Add presync event hook (#580)

* Add presync hook

* Add note to README about new hook

.circleci/config.yml

@@ -4,31 +4,51 @@ jobs:
 
   build:
     docker:
-      - image: circleci/golang:1.10.1
-    working_directory: /go/src/github.com/roboll/helmfile
+      - image: circleci/golang:1.12.4
+    environment:
+      GOPATH: /go
+    working_directory: /home/circleci/workspace/helmfile
     steps:
       - checkout
+      - restore_cache:
+          keys:
+          - go-mod-cache-v1-{{ checksum "./go.sum" }}
+          - go-mod-cache-v1-
+      - run: go env
       - run: make build
+      - save_cache:
+          key: go-mod-cache-v1-{{ checksum "./go.sum" }}
+          paths:
+          - /go/pkg/mod
       - persist_to_workspace:
-          root: /go/src/github.com/roboll/helmfile
+          root: ./
           paths:
             - .
 
   test:
+    environment:
+      GOPATH: /go
     docker:
-      - image: circleci/golang:1.10.1
-    working_directory: /go/src/github.com/roboll/helmfile
+      - image: circleci/golang:1.12.4
+    working_directory: /home/circleci/workspace/helmfile
     steps:
       - checkout
+      - restore_cache:
+          keys:
+          - go-mod-cache-v1-{{ checksum "./go.sum" }}
+          - go-mod-cache-v1-
       - run: make check
       - run: make pristine
       - run: make test
 
   # thanks to https://raw.githubusercontent.com/weaveworks/launcher/master/.circleci/config.yml
   integration_tests:
-    machine: true
+    machine:
+      image: circleci/classic:201808-01
     environment:
       CHANGE_MINIKUBE_NONE_USER: true
+      MINIKUBE_WANTUPDATENOTIFICATION: false
+      MINIKUBE_WANTREPORTERRORPROMPT: false
     steps:
       - checkout
       - run: mkdir ~/build
@@ -38,7 +58,7 @@ jobs:
       - run:
           name: Install helm
           environment:
-            HELM_VERSION: v2.9.0
+            HELM_VERSION: v2.13.0
           command: |
             HELM_FILENAME="helm-${HELM_VERSION}-linux-amd64.tar.gz"
             curl -Lo ${HELM_FILENAME} "https://kubernetes-helm.storage.googleapis.com/${HELM_FILENAME}"
@@ -49,14 +69,13 @@ jobs:
           name: Deploy minikube
           environment:
             CHANGE_MINIKUBE_NONE_USER: true
-            K8S_VERSION: v1.9.0
-            MINIKUBE_VERSION: v0.25.2
+            K8S_VERSION: v1.12.3
+            MINIKUBE_VERSION: v0.30.0
           command: |
             curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/${K8S_VERSION}/bin/linux/amd64/kubectl
             chmod +x kubectl && sudo mv kubectl /usr/local/bin/
             curl -Lo minikube https://storage.googleapis.com/minikube/releases/${MINIKUBE_VERSION}/minikube-linux-amd64
             chmod +x minikube && sudo mv minikube /usr/local/bin/
-            sudo minikube config set WantReportErrorPrompt false
             sudo -E minikube start --vm-driver=none --kubernetes-version=${K8S_VERSION}
             sudo -E minikube update-context
       - run:
@@ -72,16 +91,21 @@ jobs:
 
   release:
     docker:
-      - image: circleci/golang:1.10.1
-    working_directory: /go/src/github.com/roboll/helmfile
+      - image: circleci/golang:1.12.4
+    working_directory: /home/circleci/workspace/helmfile
     steps:
     - checkout
+    - restore_cache:
+        keys:
+        - go-mod-cache-v1-{{ checksum "./go.sum" }}
+        - go-mod-cache-v1-
     - setup_remote_docker
     - run:
         command: |
           docker login -u="$DOCKER_USER" -p="$DOCKER_PASS" quay.io
           make tools
-          BUILD_URL="$CIRCLE_BUILD_URL" make push release
+          go mod vendor
+          ORG=roboll BUILD_URL="$CIRCLE_BUILD_URL" make push release
 
 workflows:
   version: 2

CONTRIBUTING.md

@@ -0,0 +1,39 @@
+# DCO + License
+
+By contributing to `helmfile`, you accept and agree to the following DCO and license terms and
+conditions for your present and future Contributions submitted to the `helmfile` project.
+
+[DCO](https://developercertificate.org/)
+[License](https://github.com/roboll/helmfile/blob/master/LICENSE)
+
+# Developing helmfile
+
+Locate your `GOPATH`, usually `~/go`, and run:
+
+```console
+$ go get github.com/roboll/helmfile
+
+$ cd $GOPATH/src/github.com/roboll/helmfile
+
+$ git checkout -b your-shiny-new-feature origin/master
+
+...
+
+$ git commit -m 'feat: do whatever for whatever purpose
+
+This adds ... by:
+
+- Adding ...
+- Changing ...
+- Removing...
+
+Resolves #ISSUE_NUMBER
+'
+
+$ hub fork
+$ git push YOUR_GITHUB_USER your-shiny-new-feature
+$ hub pull-request
+```
+
+Note that the above tutorial uses [hub](https://github.com/github/hub) just for ease of explanation.
+Please use whatever tool or way to author your pull request!

Dockerfile

@@ -1,20 +1,20 @@
-FROM golang:1.10.1-alpine3.7 as builder
+FROM golang:1.12.4-alpine3.9 as builder
 
 RUN apk add --no-cache make git
-WORKDIR /go/src/github.com/roboll/helmfile/
-COPY . /go/src/github.com/roboll/helmfile/
+WORKDIR /workspace/helmfile
+COPY . /workspace/helmfile
 RUN make static-linux
 
 # -----------------------------------------------------------------------------
 
-FROM alpine:3.7
+FROM alpine:3.8
 
 RUN apk add --no-cache ca-certificates git bash curl
 
-ARG HELM_VERSION=v2.10.0
+ARG HELM_VERSION=v2.13.0
 ARG HELM_LOCATION="https://kubernetes-helm.storage.googleapis.com"
 ARG HELM_FILENAME="helm-${HELM_VERSION}-linux-amd64.tar.gz"
-ARG HELM_SHA256="0fa2ed4983b1e4a3f90f776d08b88b0c73fd83f305b5b634175cb15e61342ffe"
+ARG HELM_SHA256="15eca6ad225a8279de80c7ced42305e24bc5ac60bb7d96f2d2fa4af86e02c794"
 RUN wget ${HELM_LOCATION}/${HELM_FILENAME} && \
     sha256sum ${HELM_FILENAME} | grep -q "${HELM_SHA256}" && \
     tar zxf ${HELM_FILENAME} && mv /linux-amd64/helm /usr/local/bin/ && \
@@ -24,6 +24,6 @@ RUN mkdir -p "$(helm home)/plugins"
 RUN helm plugin install https://github.com/databus23/helm-diff && \
     helm plugin install https://github.com/futuresimple/helm-secrets
 
-COPY --from=builder /go/src/github.com/roboll/helmfile/dist/helmfile_linux_amd64 /usr/local/bin/helmfile
+COPY --from=builder /workspace/helmfile/dist/helmfile_linux_amd64 /usr/local/bin/helmfile
 
 CMD ["/usr/local/bin/helmfile"]

Gopkg.lock

@@ -1,90 +0,0 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  name = "github.com/Masterminds/semver"
-  packages = ["."]
-  revision = "8d82589cda2d7b5b9167396841975c4535c9bec6"
-  version = "v1.4.1"
-
-[[projects]]
-  name = "github.com/Masterminds/sprig"
-  packages = ["."]
-  revision = "6b2a58267f6a8b1dc8e2eb5519b984008fa85e8c"
-  version = "v2.15.0"
-
-[[projects]]
-  name = "github.com/aokoli/goutils"
-  packages = ["."]
-  revision = "3391d3790d23d03408670993e957e8f408993c34"
-  version = "v1.0.1"
-
-[[projects]]
-  name = "github.com/google/uuid"
-  packages = ["."]
-  revision = "064e2069ce9c359c118179501254f67d7d37ba24"
-  version = "0.2"
-
-[[projects]]
-  name = "github.com/huandu/xstrings"
-  packages = ["."]
-  revision = "2bf18b218c51864a87384c06996e40ff9dcff8e1"
-  version = "v1.0.0"
-
-[[projects]]
-  name = "github.com/imdario/mergo"
-  packages = ["."]
-  revision = "9d5f1277e9a8ed20c3684bda8fde67c05628518c"
-  version = "v0.3.4"
-
-[[projects]]
-  name = "github.com/urfave/cli"
-  packages = ["."]
-  revision = "6011f165dc288c72abd8acd7722f837c5c64198d"
-
-[[projects]]
-  name = "go.uber.org/atomic"
-  packages = ["."]
-  revision = "1ea20fb1cbb1cc08cbd0d913a96dead89aa18289"
-  version = "v1.3.2"
-
-[[projects]]
-  name = "go.uber.org/multierr"
-  packages = ["."]
-  revision = "3c4937480c32f4c13a875a1829af76c98ca3d40a"
-  version = "v1.1.0"
-
-[[projects]]
-  name = "go.uber.org/zap"
-  packages = [
-    ".",
-    "buffer",
-    "internal/bufferpool",
-    "internal/color",
-    "internal/exit",
-    "zapcore"
-  ]
-  revision = "eeedf312bc6c57391d84767a4cd413f02a917974"
-  version = "v1.8.0"
-
-[[projects]]
-  branch = "master"
-  name = "golang.org/x/crypto"
-  packages = [
-    "pbkdf2",
-    "scrypt"
-  ]
-  revision = "b2aa35443fbc700ab74c586ae79b81c171851023"
-
-[[projects]]
-  name = "gopkg.in/yaml.v2"
-  packages = ["."]
-  revision = "5420a8b6744d3b0345ab293f6fcba19c978f1183"
-  version = "v2.2.1"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  inputs-digest = "b1f000751afc0a44973307c69b6a4b8e8c1b807fd9881a13f370c30fcbcab7a2"
-  solver-name = "gps-cdcl"
-  solver-version = 1

Gopkg.toml

@@ -1,15 +0,0 @@
-[[constraint]]
-  name = "github.com/Masterminds/sprig"
-  version = "2.15.0"
-
-[[constraint]]
-  branch = "v2"
-  name = "gopkg.in/yaml.v2"
-
-[prune]
-  go-tests = true
-  unused-packages = true
-
-[[constraint]]
-  name = "github.com/imdario/mergo"
-  version = "0.3.4"

Makefile

@@ -33,12 +33,17 @@ static-linux:
 	env CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o "dist/helmfile_linux_amd64" -ldflags '-X main.Version=${TAG}' ${TARGETS}
 .PHONY: linux
 
+install:
+	env CGO_ENABLED=0 go install -ldflags '-X main.Version=${TAG}' ${TARGETS}
+.PHONY: install
+
 clean:
 	rm dist/helmfile_*
 .PHONY: clean
 
 pristine: generate fmt
-	git ls-files --exclude-standard --modified --deleted --others | diff /dev/null -
+	git diff | cat
+	git ls-files --exclude-standard --modified --deleted --others -x vendor  | grep -v '^go.' | diff /dev/null -
 .PHONY: pristine
 
 release: pristine cross
@@ -61,3 +66,19 @@ tools:
 TAG  = $(shell git describe --tags --abbrev=0 HEAD)
 LAST = $(shell git describe --tags --abbrev=0 HEAD^)
 BODY = "`git log ${LAST}..HEAD --oneline --decorate` `printf '\n\#\#\# [Build Info](${BUILD_URL})'`"
+
+release/minor:
+	git checkout master
+	git pull --rebase origin master
+	bash -c 'if git branch | grep autorelease; then git branch -D autorelease; else echo no branch to be cleaned; fi'
+	git checkout -b autorelease origin/master
+	bash -c 'SEMTAG_REMOTE=origin hack/semtag final -s minor'
+	git checkout master
+
+release/patch:
+	git checkout master
+	git pull --rebase origin master
+	bash -c 'if git branch | grep autorelease; then git branch -D autorelease; else echo no branch to be cleaned; fi'
+	git checkout -b autorelease origin/master
+	bash -c 'SEMTAG_REMOTE=origin hack/semtag final -s patch'
+	git checkout master

README.md

@@ -3,6 +3,7 @@
 Deploy Kubernetes Helm Charts
 
 [![Docker Repository on Quay](https://quay.io/repository/roboll/helmfile/status "Docker Repository on Quay")](https://quay.io/repository/roboll/helmfile)
+[![Slack Community #helmfile](https://slack.sweetops.com/badge.svg)](https://slack.sweetops.com)
 
 ## status
 
@@ -24,7 +25,7 @@ To avoid upgrades for each iteration of `helm`, the `helmfile` executable delega
 
 ## configuration syntax
 
-**CAUTION**: This documentation is for the development version of helmfile. If you are looking for the documentation for any of releases, please switch to the corresponding branch like [v0.12.0](https://github.com/roboll/helmfile/tree/v0.12.0).
+**CAUTION**: This documentation is for the development version of Helmfile. If you are looking for the documentation for any of releases, please switch to the corresponding release tag like [v0.31.0](https://github.com/roboll/helmfile/tree/v0.31.0).
 
 The default helmfile is `helmfile.yaml`:
 
@@ -37,12 +38,13 @@ repositories:
     username: optional_username
     password: optional_password
 
-context: kube-context					 # kube-context (--kube-context)
+# context: kube-context # this directive is deprecated, please consider using helmDefaults.kubeContext
 
-#default values to set for args along with dedicated keys that can be set by contributers, cli args take precedence overe these
-helmDefaults:           
+#default values to set for args along with dedicated keys that can be set by contributers, cli args take precedence over these
+helmDefaults:
   tillerNamespace: tiller-namespace  #dedicated default key for tiller-namespace
-  kubeContext: kube-context          #dedicated default key for kube-context
+  tillerless: false                  #dedicated default key for tillerless
+  kubeContext: kube-context          #dedicated default key for kube-context (--kube-context)
   # additional and global args passed to helm
   args:
     - "--set k=v"
@@ -52,6 +54,14 @@ helmDefaults:
   timeout: 600
   recreatePods: true
   force: true
+  # enable TLS for request to Tiller
+  tls: true
+  # path to TLS CA certificate file (default "$HELM_HOME/ca.pem")
+  tlsCACert: "path/to/ca.pem"
+  # path to TLS certificate file (default "$HELM_HOME/cert.pem")
+  tlsCert: "path/to/cert.pem"
+  # path to TLS key file (default "$HELM_HOME/key.pem")
+  tlsKey: "path/to/key.pem"
 
 releases:
   # Published chart example
@@ -61,6 +71,7 @@ releases:
       foo: bar
     chart: roboll/vault-secret-manager     # the chart being installed to create this release, referenced by `repository/chart` syntax
     version: ~1.24.1                       # the semver of the chart. range constraint is supported
+    missingFileHandler: warn # set to either "Error" or "Warn". "Error" instructs helmfile to fail when unable to find a values or secrets file. When "Warn", it prints the file and continues.
     values:
       # value files passed via --values
       - vault.yaml
@@ -83,6 +94,9 @@ releases:
       values:
       - 1
       - 2
+    # set a templated value
+    - name: namespace
+      value: {{ .Namespace }}
     # will attempt to decrypt it using helm-secrets plugin
     secrets:
       - vault_secret.yaml
@@ -94,11 +108,27 @@ releases:
     recreatePods: true
     # forces resource update through delete/recreate if needed
     force: true
+    # set `false` to uninstall on sync
+    installed: true
+    # restores previous state in case of failed release
+    atomic: true
+    # name of the tiller namespace
+    tillerNamespace: vault
+    # if true, will use the helm-tiller plugin
+    tillerless: false
+    # enable TLS for request to Tiller
+    tls: true
+    # path to TLS CA certificate file (default "$HELM_HOME/ca.pem")
+    tlsCACert: "path/to/ca.pem"
+    # path to TLS certificate file (default "$HELM_HOME/cert.pem")
+    tlsCert: "path/to/cert.pem"
+    # path to TLS key file (default "$HELM_HOME/key.pem")
+    tlsKey: "path/to/key.pem"
 
   # Local chart example
   - name: grafana                            # name of this release
     namespace: another                       # target namespace
-    chart: ../my-charts/grafana              # the chart being installed to create this release, referenced by relative path to local chart
+    chart: ../my-charts/grafana              # the chart being installed to create this release, referenced by relative path to local helmfile
     values:
     - "../../my-values/grafana/values.yaml"             # Values file (relative path to manifest)
     - ./values/{{ requiredEnv "PLATFORM_ENV" }}/config.yaml # Values file taken from path with environment variable. $PLATFORM_ENV must be set in the calling environment.
@@ -121,7 +151,7 @@ Environment variables can be used in most places for templating the helmfile. Cu
 Examples:
 
 ```yaml
-respositories:
+repositories:
 - name: your-private-git-repo-hosted-charts
   url: https://{{ requiredEnv "GITHUB_TOKEN"}}@raw.githubusercontent.com/kmzfs/helm-repo-in-github/master/
 ```
@@ -144,9 +174,11 @@ releases:
 
 ## installation
 
-- `go get github.com/roboll/helmfile` or
 - download one of [releases](https://github.com/roboll/helmfile/releases) or
-- run as a [container](https://quay.io/roboll/helmfile)
+- run as a [container](https://quay.io/roboll/helmfile) or
+- install from [AUR](https://aur.archlinux.org/packages/kubernetes-helmfile-bin/) for Archlinux or
+- Windows (using [scoop](https://scoop.sh/)): `scoop install helmfile`
+- macOS (using [homebrew](https://brew.sh/)): `brew install helmfile`
 
 ## getting started
 
@@ -167,12 +199,16 @@ releases:
 Sync your Kubernetes cluster state to the desired one by running:
 
 ```console
-helmfile sync
+helmfile apply
 ```
 
 Congratulations! You now have your first Prometheus deployment running inside your cluster.
 
-Iterate on the `helmfile.yaml` by referencing the [configuration syntax](#configuration-syntax) and the [cli reference](#cli-reference).
+Iterate on the `helmfile.yaml` by referencing:
+
+- [Configuration syntax](#configuration-syntax)
+- [CLI reference](#cli-reference).
+- [Helmfile Best Practices Guide](https://github.com/roboll/helmfile/blob/master/docs/writing-helmfile.md)
 
 ## cli reference
 
@@ -183,28 +219,35 @@ NAME:
 USAGE:
    helmfile [global options] command [command options] [arguments...]
 
+VERSION:
+   v0.52.0
+
 COMMANDS:
-     repos   sync repositories from state file (helm repo add && helm repo update)
-     charts  sync releases from state file (helm upgrade --install)
-     diff    diff releases from state file against env (helm diff)
-     lint    lint charts from state file (helm lint)
-     sync    sync all resources from state file (repos, releases and chart deps)
-     apply   apply all resources from state file only when there are changes
-     status  retrieve status of releases in state file
-     delete  delete releases from state file (helm delete)
-     test    test releases from state file (helm test)
+     repos     sync repositories from state file (helm repo add && helm repo update)
+     charts    DEPRECATED: sync releases from state file (helm upgrade --install)
+     diff      diff releases from state file against env (helm diff)
+     template  template releases from state file against env (helm template)
+     lint      lint charts from state file (helm lint)
+     sync      sync all resources from state file (repos, releases and chart deps)
+     apply     apply all resources from state file only when there are changes
+     status    retrieve status of releases in state file
+     delete    DEPRECATED: delete releases from state file (helm delete)
+     destroy   deletes and then purges releases
+     test      test releases from state file (helm test)
 
 GLOBAL OPTIONS:
    --helm-binary value, -b value           path to helm binary
    --file helmfile.yaml, -f helmfile.yaml  load config from file or directory. defaults to helmfile.yaml or `helmfile.d`(means `helmfile.d/*.yaml`) in this preference
+   --environment default, -e default       specify the environment name. defaults to default
    --quiet, -q                             Silence output. Equivalent to log-level warn
    --kube-context value                    Set kubectl context. Uses current context by default
    --log-level value                       Set log level, default info
-   --namespace value, -n value             Set namespace. Uses the namespace set in the context by default
+   --namespace value, -n value             Set namespace. Uses the namespace set in the context by default, and is available in templates as {{ .Namespace }}
    --selector value, -l value              Only run using the releases that match labels. Labels can take the form of foo=bar or foo!=bar.
                                            A release must match all labels in a group in order to be used. Multiple groups can be specified at once.
                                            --selector tier=frontend,tier!=proxy --selector tier=backend. Will match all frontend, non-proxy releases AND all backend releases.
                                            The name of a release can be used as a label. --selector name=myrelease
+   --interactive, -i                       Request confirmation before attempting to modify clusters
    --help, -h                              show help
    --version, -v                           print the version
 ```
@@ -229,13 +272,23 @@ please look at their [documentation](https://github.com/databus23/helm-diff#helm
 
 ### apply
 
-The `helmfile apply` sub-command begins by executing `diff`. If `diff` finds that there is any changes, `sync` is executed after prompting you for an confirmation. `--auto-approve` skips the confirmation.
+The `helmfile apply` sub-command begins by executing `diff`. If `diff` finds that there is any changes, `sync` is executed. Adding `--interactive` instructs Helmfile to request your confirmation before `sync`.
 
 An expected use-case of `apply` is to schedule it to run periodically, so that you can auto-fix skews between the desired and the current state of your apps running on Kubernetes clusters.
 
-### delete
+### destroy
 
-The `helmfile delete` sub-command deletes all the releases defined in the manfiests
+The `helmfile destroy` sub-command deletes and purges all the releases defined in the manifests.
+
+`helmfile --interactive destroy` instructs Helmfile to request your confirmation before actually deleting releases.
+
+`destroy` basically runs `helm delete --purge` on all the targeted releases. If you don't want purging, use `helmfile delete` instead.
+
+### delete (DEPRECATED)
+
+The `helmfile delete` sub-command deletes all the releases defined in the manifests.
+
+`helmfile --interactive delete` instructs Helmfile to request your confirmation before actually deleting releases.
 
 Note that `delete` doesn't purge releases. So `helmfile delete && helmfile sync` results in sync failed due to that releases names are not deleted but preserved for future references. If you really want to remove releases for reuse, add `--purge` flag to run it like `helmfile delete --purge`.
 
@@ -263,13 +316,13 @@ Using manifest files in conjunction with command line argument can be a bit conf
 A few rules to clear up this ambiguity:
 
 - Absolute paths are always resolved as absolute paths
-- Relative paths referenced *in* the helmfile manifest itself are relative to that manifest
+- Relative paths referenced *in* the Helmfile manifest itself are relative to that manifest
 - Relative paths referenced on the command line are relative to the current working directory the user is in
 
 For additional context, take a look at [paths examples](PATHS.md)
 
 ## Labels Overview
-A selector can be used to only target a subset of releases when running helmfile. This is useful for large helmfiles with releases that are logically grouped together.
+A selector can be used to only target a subset of releases when running Helmfile. This is useful for large helmfiles with releases that are logically grouped together.
 
 Labels are simple key value pairs that are an optional field of the release spec. When selecting by label, the search can be inverted. `tier!=backend` would match all releases that do NOT have the `tier: backend` label. `tier=fronted` would only match releases with the `tier: frontend` label.
 
@@ -279,15 +332,20 @@ The `selector` parameter can be specified multiple times. Each parameter is reso
 
 `--selector tier=frontend --selector tier=backend` will select all the charts
 
+In addition to user supplied labels, the name, the namespace, and the chart are available to be used as selectors.  The chart will just be the chart name excluding the repository (Example `stable/filebeat` would be selected using `--selector chart=filebeat`).
+
 ## Templates
 
-You can use go's text/template expressions in `helmfile.yaml` and `values.yaml`(helm values files).
+You can use go's text/template expressions in `helmfile.yaml` and `values.yaml.gotmpl` (templated helm values files). `values.yaml` references will be used verbatim. In other words:
+
+- for value files ending with `.gotmpl`, template expressions will be rendered
+- for plain value files (ending in `.yaml`), content will be used as-is
 
 In addition to built-in ones, the following custom template functions are available:
 
 - `readFile` reads the specified local file and generate a golang string
 - `fromYaml` reads a golang string and generates a map
-- `setValuleAtPath PATH NEW_VALUE` traverses a golang map, replaces the value at the PATH with NEW_VALUE
+- `setValueAtPath PATH NEW_VALUE` traverses a golang map, replaces the value at the PATH with NEW_VALUE
 - `toYaml` marshals a map into a string
 
 ### Values Files Templates
@@ -302,7 +360,7 @@ releases
   - values.yaml.gotmpl
 ```
 
-Every values file whose file extension is `.gotmpl` is considered as a tempalte file.
+Every values file whose file extension is `.gotmpl` is considered as a template file.
 
 Suppose `values.yaml.gotmpl` was something like:
 
@@ -391,12 +449,12 @@ environments:
 
 releases:
 
-{{ if (eq .Environment.Name "production" }}
+{{ if eq .Environment.Name "production" }}
 - name: newrelic-agent
   # snip
 {{ end }}
 - name: myapp
-  # snip  
+  # snip
 ```
 
 ## Environment Values
@@ -424,30 +482,73 @@ releases:
 
 ```yaml
 domain: prod.example.com
+releaseName: prod
 ```
 
 `values.yaml.gotmpl`
 
 ```yaml
-domain: {{ .Environment.Values.domain | default "dev.example.com" }}
+domain: {{ .Environment.Values | getOrNil "my.domain" | default "dev.example.com" }}
 ```
 
 `helmfile sync` installs `myapp` with the value `domain=dev.example.com`,
 whereas `helmfile --environment production sync` installs the app with the value `domain=production.example.com`.
 
+For even more flexibility, you can now use values declared in the `environments:` section in other parts of your helmfiles:
+
+consider:
+`default.yaml`
+
+```yaml
+domain: dev.example.com
+releaseName: dev
+```
+
+```yaml
+environments:
+  default:
+    values:
+    - default.yaml
+  production:
+    values:
+    - production.yaml #  bare .yaml file, content will be used verbatim
+    - other.yaml.gotmpl  #  template directives with potential side-effects like `exec` and `readFile` will be honoured
+
+releases:
+- name: myapp-{{ .Environment.Values.releaseName }} # release name will be one of `dev` or `prod` depending on selected environment
+  values:
+  - values.yaml.gotmpl
+
+{{ if eq (.Environment.Values.releaseName "prod" ) }}
+# this release would be installed only if selected environment is `production`
+- name: production-specific-release
+  ...
+{{ end }}
+```
+
 ## Environment Secrets
 
-Environment Secrets are encrypted versions of `Environment Values`.
+Environment Secrets (not to be confused with Kubernetes Secrets) are encrypted versions of `Environment Values`.
 You can list any number of `secrets.yaml` files created using `helm secrets` or `sops`, so that
-helmfile could automatically decrypt and merge the secrets into the environment values.
+Helmfile could automatically decrypt and merge the secrets into the environment values.
 
-Suppose you have environment secrets defined in `hemlfile.yaml`:
+First you must have the [helm-secrets](https://github.com/futuresimple/helm-secrets) plugin installed along with a
+`.sops.yaml` file to configure the method of encryption (this can be in the same directory as your helmfile or
+in the sub-directory containing your secrets files).
 
+Then suppose you have a a foo.bar secret defined in `environments/production/secrets.yaml`:
+```yaml
+foo.bar: "mysupersecretstring"
+```
+
+You can then encrypt it with `helm secrets enc environments/production/secrets.yaml`
+
+Then reference that encrypted file in `helmfile.yaml`:
 ```yaml
 environments:
   production:
     secrets:
-    - environments/produdction/secrets.yaml
+    - environments/production/secrets.yaml
 
 releases:
 - name: myapp
@@ -456,12 +557,21 @@ releases:
   - values.yaml.gotmpl
 ```
 
-an environment secret `foo.bar` can be referenced by the below template expression in your `values.yaml.gotmpl`:
+Then the environment secret `foo.bar` can be referenced by the below template expression in your `values.yaml.gotmpl`:
 
 ```yaml
-{{ .Values.foo.bar }
+{{ .Environment.Values.foo.bar }}
 ```
 
+## Tillerless
+
+With the [helm-tiller](https://github.com/rimusz/helm-tiller) plugin installed, you can work without tiller installed.
+
+To enable this mode, you need to define `tillerless: true` and set the `tillerNamespace` in the `helmDefaults` section
+or in the `releases` entries.
+
+Since every commands is run with `helm tiller run ...`, you have to disable concurrency. Otherwise you'll get
+mysterious errors about the tiller daemon.
 
 ## Separating helmfile.yaml into multiple independent files
 
@@ -491,7 +601,7 @@ All the yaml files under the specified directory are processed in the alphabetic
 
 In case you want more control over how multiple `helmfile.yaml` files are organized, use `helmfiles:` configuration key in the `helmfile.yaml`:
 
-Suppose you have multiple microservices organized in a Git reposistory that looks like:
+Suppose you have multiple microservices organized in a Git repository that looks like:
 
 - `myteam/` (sometimes it is equivalent to a k8s ns, that is `kube-system` for `clusterops` team)
   - `apps/`
@@ -519,7 +629,7 @@ for d in apps/*; do helmfile -f $d diff; if [ $? -eq 2 ]; then helmfile -f $d sy
 
 At this point, you'll start writing a `Makefile` under `myteam/` so that `make sync-all` will do the job.
 
-It does work, but you can rely on the helmfile's feature instead.
+It does work, but you can rely on the Helmfile feature instead.
 
 Put `myteam/helmfile.yaml` that looks like:
 
@@ -533,9 +643,171 @@ Just run `helmfile sync` inside `myteam/`, and you are done.
 
 All the files are sorted alphabetically per group = array item inside `helmfiles:`, so that you have granular control over ordering, too.
 
+#### selectors
+When composing helmfiles you can use selectors from the command line as well as explicit selectors inside the parent helmfile to filter the releases to be used.
+```yaml
+helmfiles:
+- apps/*/helmfile.yaml
+- path: apps/a-helmfile.yaml
+    selectors:          # list of selectors
+    - name=prometheus
+    - tier=frontend
+- path: apps/b-helmfile.yaml # no selector, so all releases are used
+    selectors: []
+- path: apps/c-helmfile.yaml # parent selector to be used or cli selector for the initial helmfile
+    selectorsInherited: true
+```
+* When a selector is specified, only this selector applies and the parents or CLI selectors are ignored.
+* When not selector is specified there are 2 modes for the selector inheritance because we would like to change the current inheritance behavior (see [issue #344](https://github.com/roboll/helmfile/issues/344)  ).
+  * Legacy mode, sub-helmfiles without selectors inherit selectors from their parent helmfile. The initial helmfiles inherit from the command line selectors.
+  * explicit mode, sub-helmfile without selectors do not inherit from their parent or the CLI selector. If you want them to inherit from their parent selector then use `selectorsInherited: true`. To enable this explicit mode you need to set the following environment variable `HELMFILE_EXPERIMENTAL=explicit-selector-inheritance` (see [experimental](#experimental-features)).
+* Using `selector: []` will select all releases regardless of the parent selector or cli for the initial helmfile
+* using `selectorsInherited: true` make the sub-helmfile selects releases with the parent selector or the cli for the initial helmfile. You cannot specify an explicit selector while using `selectorsInherited: true`
+
+## Importing values from any source
+
+The `exec` template function that is available in `values.yaml.gotmpl` is useful for importing values from any source
+that is accessible by running a command:
+
+A usual usage of `exec` would look like this:
+
+```
+mysetting: |
+{{ exec "./mycmd" (list "arg1" "arg2" "--flag1") | indent 2 }}
+```
+
+Or even with a pipeline:
+
+```
+mysetting: |
+{{ yourinput | exec "./mycmd-consume-stdin" (list "arg1" "arg2") | indent 2 }}
+```
+
+The possibility is endless. Try importing values from your golang app, bash script, jsonnet, or anything!
+
+## Hooks
+
+A Helmfile hook is a per-release extension point that is composed of:
+
+- `events`
+- `command`
+- `args`
+
+Helmfile triggers various `events` while it is running.
+Once `events` are triggered, associated `hooks` are executed, by running the `command` with `args`.
+
+Currently supported `events` are:
+
+- `prepare`
+- `cleanup`
+- `presync`
+
+Hooks associated to `prepare` events are triggered after each release in your helmfile is loaded from YAML, before execution.
+
+Hooks associated to `cleanup` events are triggered after each release is processed.
+
+Hooks associated to `presync` events are triggered before each release is applied to the remote cluster. This is the ideal event to execute any commands that may mutate the cluster state as it will not be run for read-only operations like `lint`, `diff` or `template`.
+
+The following is an example hook that just prints the contextual information provided to hook:
+
+```
+releases:
+- name: myapp
+  chart: mychart
+  # *snip*
+  hooks:
+  - events: ["prepare", "cleanup"]
+    command: "echo"
+    args: ["{{`{{.Environment.Name}}`}}", "{{`{{.Release.Name}}`}}", "{{`{{.HelmfileCommand}}`}}\
+"]
+```
+
+Let's say you ran `helmfile --environment prod sync`, the above hook results in executing:
+
+```
+echo {{Environment.Name}} {{.Release.Name}} {{.HelmfileCommand}}
+```
+
+Whereas the template expressions are executed thus the command becomes:
+
+```
+echo prod myapp sync
+```
+
+Now, replace `echo` with any command you like, and rewrite `args` that actually conforms to the command, so that you can integrate any command that does:
+
+- templating
+- linting
+- testing
+
+For templating, imagine that you created a hook that generates a helm chart on-the-fly by running an external tool like ksonnet, kustomize, or your own template engine.
+It will allow you to write your helm releases with any language you like, while still leveraging goodies provided by helm.
+
+### Helmfile + Kustomize
+
+Do you prefer `kustomize` to write and organize your Kubernetes apps, but still want to leverage helm's useful features
+like rollback, history, and so on? This section is for you!
+
+The combination of `hooks` and [helmify-kustomize](https://gist.github.com/mumoshu/f9d0bd98e0eb77f636f79fc2fb130690)
+enables you to integrate [kustomize](https://github.com/kubernetes-sigs/kustomize) into Helmfile.
+
+That is, you can use `kustommize` to build a local helm chart from a kustomize overlay.
+
+Let's assume you have a kustomize project named `foo-kustomize` like this:
+
+```
+foo-kustomize/
+├── base
+│   ├── configMap.yaml
+│   ├── deployment.yaml
+│   ├── kustomization.yaml
+│   └── service.yaml
+└── overlays
+    ├── default
+    │   ├── kustomization.yaml
+    │   └── map.yaml
+    ├── production
+    │   ├── deployment.yaml
+    │   └── kustomization.yaml
+    └── staging
+        ├── kustomization.yaml
+        └── map.yaml
+
+5 directories, 10 files
+```
+
+Write `helmfile.yaml`:
+
+```yaml
+- name: kustomize
+  chart: ./foo
+  hooks:
+  - events: ["prepare", "cleanup"]
+    command: "../helmify"
+    args: ["{{`{{if eq .Event.Name \"prepare\"}}build{{else}}clean{{end}}`}}", "{{`{{.Release.Ch\
+art}}`}}", "{{`{{.Environment.Name}}`}}"]
+```
+
+Run `helmfile --environment staging sync` and see it results in helmfile running `kustomize build foo-kustomize/overlays/staging > foo/templates/all.yaml`.
+
+Voilà! You can mix helm releases that are backed by remote charts, local charts, and even kustomize overlays.
+
+## Guides
+
+Use the [Helmfile Best Practices Guide](/docs/writing-helmfile.md) to write advanced helmfiles that feature:
+
+- Default values
+- Layering
+
+We also have dedicated documentation on the following topics which might interest you:
+
+- [Shared Configurations Across Teams](/docs/shared-configuration-across-teams.md)
+
+Or join our friendly slack community in the [`#helmfile`](https://slack.sweetops.com) channel to ask questions and get help. Check out our [slack archive](https://archive.sweetops.com/helmfile/) for good examples of how others are using it.
+
 ## Using env files
 
-helmfile itself doesn't have an ability to load env files. But you can write some bash script to achieve the goal:
+Helmfile itself doesn't have an ability to load env files. But you can write some bash script to achieve the goal:
 
 ```console
 set -a; . .env; set +a; helmfile sync
@@ -543,13 +815,33 @@ set -a; . .env; set +a; helmfile sync
 
 Please see #203 for more context.
 
-## Running helmfile without an Internet connection
+## Running helmfile interactively
+
+`helmfile --interactive [apply|destroy]` requests confirmation from you before actually modifying your cluster.
+
+Use it when you're running `helmfile` manually on your local machine or a kind of secure administrative hosts.
+
+For your local use-case, aliasing it like `alias hi='helmfile --interactive'` would be convenient.
+
+## Running Helmfile without an Internet connection
 
 Once you download all required charts into your machine, you can run `helmfile charts` to deploy your apps.
 It basically run only `helm upgrade --install` with your already-downloaded charts, hence no Internet connection is required.
 See #155 for more information on this topic.
 
+## Experimental features
+Some experimental features may be available for testing in perspective of being (or not) included in a future release.
+Those features are set using the environment variable `HELMFILE_EXPERIMENTAL`. Here is the current experimental feature :
+* `explicit-selector-inheritance` : remove today implicit cli selectors inheritance for composed helmfiles, see [composition selector](#selectors)
+
+If you want to enable all experimental features set the env var to `HELMFILE_EXPERIMENTAL=true`
 
 ## Examples
 
-For more examples, see the [examples/README.md](https://github.com/roboll/helmfile/blob/master/examples/README.md) or the [`helmfile.d`](https://github.com/cloudposse/helmfiles/tree/master/helmfile.d) distribution of helmfiles by [Cloud Posse](https://github.com/cloudposse/).
+For more examples, see the [examples/README.md](https://github.com/roboll/helmfile/blob/master/examples/README.md) or the [`helmfile`](https://github.com/cloudposse/helmfiles/tree/master/releases) distribution by [Cloud Posse](https://github.com/cloudposse/).
+
+# Attribution
+
+We use:
+
+- [semtag](https://github.com/pnikosis/semtag) for automated semver tagging. I greatly appreciate the author(pnikosis)'s effort on creating it and their kindness to share it!

args/args.go

@@ -83,9 +83,6 @@ func GetArgs(args string, state *state.HelmState) []string {
 		}
 	}
 
-	if state.HelmDefaults.TillerNamespace != "" {
-		argsMap.SetArg("--tiller-namespace", state.HelmDefaults.TillerNamespace, false)
-	}
 	if state.HelmDefaults.KubeContext != "" {
 		argsMap.SetArg("--kube-context", state.HelmDefaults.KubeContext, false)
 	}

cmd/cmd.go

@@ -0,0 +1,100 @@
+package cmd
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/helmexec"
+	"github.com/roboll/helmfile/pkg/app"
+	"github.com/roboll/helmfile/state"
+	"github.com/urfave/cli"
+	"go.uber.org/zap"
+	"os/exec"
+	"strings"
+	"syscall"
+)
+
+func VisitAllDesiredStates(c *cli.Context, converge func(*state.HelmState, helmexec.Interface, app.Context) (bool, []error)) error {
+	a, fileOrDir, err := InitAppEntry(c, false)
+	if err != nil {
+		return err
+	}
+
+	ctx := app.NewContext()
+
+	convergeWithHelmBinary := func(st *state.HelmState, helm helmexec.Interface) (bool, []error) {
+		if c.GlobalString("helm-binary") != "" {
+			helm.SetHelmBinary(c.GlobalString("helm-binary"))
+		}
+		return converge(st, helm, ctx)
+	}
+
+	err = a.VisitDesiredStates(fileOrDir, a.Selectors, convergeWithHelmBinary)
+
+	return toCliError(err)
+}
+
+func InitAppEntry(c *cli.Context, reverse bool) (*app.App, string, error) {
+	if c.NArg() > 0 {
+		cli.ShowAppHelp(c)
+		return nil, "", fmt.Errorf("err: extraneous arguments: %s", strings.Join(c.Args(), ", "))
+	}
+
+	fileOrDir := c.GlobalString("file")
+	kubeContext := c.GlobalString("kube-context")
+	namespace := c.GlobalString("namespace")
+	selectors := c.GlobalStringSlice("selector")
+	logger := c.App.Metadata["logger"].(*zap.SugaredLogger)
+
+	env := c.GlobalString("environment")
+	if env == "" {
+		env = state.DefaultEnv
+	}
+
+	app := app.Init(&app.App{
+		KubeContext: kubeContext,
+		Logger:      logger,
+		Reverse:     reverse,
+		Env:         env,
+		Namespace:   namespace,
+		Selectors:   selectors,
+	})
+
+	return app, fileOrDir, nil
+}
+
+func FindAndIterateOverDesiredStatesUsingFlagsWithReverse(c *cli.Context, reverse bool, converge func(*state.HelmState, helmexec.Interface, app.Context) []error) error {
+	a, fileOrDir, err := InitAppEntry(c, reverse)
+	if err != nil {
+		return err
+	}
+
+	ctx := app.NewContext()
+
+	convergeWithHelmBinary := func(st *state.HelmState, helm helmexec.Interface) []error {
+		if c.GlobalString("helm-binary") != "" {
+			helm.SetHelmBinary(c.GlobalString("helm-binary"))
+		}
+		return converge(st, helm, ctx)
+	}
+
+	err = a.VisitDesiredStatesWithReleasesFiltered(fileOrDir, convergeWithHelmBinary)
+
+	return toCliError(err)
+}
+
+func toCliError(err error) error {
+	if err != nil {
+		switch e := err.(type) {
+		case *app.NoMatchingHelmfileError:
+			return cli.NewExitError(e.Error(), 2)
+		case *exec.ExitError:
+			// Propagate any non-zero exit status from the external command like `helm` that is failed under the hood
+			status := e.Sys().(syscall.WaitStatus)
+			return cli.NewExitError(e.Error(), status.ExitStatus())
+		case *state.DiffError:
+			return cli.NewExitError(e.Error(), e.Code)
+		default:
+			return cli.NewExitError(e.Error(), 1)
+		}
+	}
+	return err
+}

cmd/deps.go

@@ -0,0 +1,37 @@
+package cmd
+
+import (
+	"github.com/roboll/helmfile/args"
+	"github.com/roboll/helmfile/helmexec"
+	"github.com/roboll/helmfile/pkg/app"
+	"github.com/roboll/helmfile/state"
+	"github.com/urfave/cli"
+)
+
+func Deps(a *app.App) cli.Command {
+	return cli.Command{
+		Name:  "deps",
+		Usage: "update charts based on the contents of requirements.yaml",
+		Flags: []cli.Flag{
+			cli.StringFlag{
+				Name:  "args",
+				Value: "",
+				Usage: "pass args to helm exec",
+			},
+		},
+		Action: func(c *cli.Context) error {
+			return VisitAllDesiredStates(c, func(state *state.HelmState, helm helmexec.Interface, ctx app.Context) (bool, []error) {
+				args := args.GetArgs(c.String("args"), state)
+				if len(args) > 0 {
+					helm.SetExtraArgs(args...)
+				}
+
+				errs := state.UpdateDeps(helm)
+
+				ok := len(errs) == 0
+
+				return ok, errs
+			})
+		},
+	}
+}

docs/shared-configuration-across-teams.md

@@ -0,0 +1,152 @@
+# Shared Configuration Across Teams
+
+Assume you have a two or more teams, each works for a different internal or external service, like:
+
+- Product 1
+- Product 2
+- Observability
+
+The simplest `helmfile.yaml` that declares the whole cluster that is composed of the three services would look like the below:
+
+```yaml
+releases:
+- name: product1-api
+  chart: product1-charts/api
+  # snip
+- name: product1-web
+  chart: product1-charts/web
+  # snip
+- name: product2-api
+  chart: saas-charts/api
+  # snip
+- name: product2-web
+  chart: product2-charts/web
+  # snip
+- name: observability-prometheus-operator
+  chart: stable/prometheus-operator
+  # snip
+- name: observability-process-exporter
+  chart: stable/prometheus-operator
+  # snip
+```
+
+This works, but what if you wanted to a separate cluster per service to achieve smaller blast radius?
+
+Let's start by creating a `helmfile.yaml` for each service.
+
+`product1/helmfile.yaml`:
+
+```yaml
+releases:
+- name: product1-api
+  chart: product1-charts/api
+  # snip
+- name: product1-web
+  chart: product1-charts/web
+  # snip
+- name: observability-prometheus-operator
+  chart: stable/prometheus-operator
+  # snip
+- name: observability-process-exporter
+  chart: stable/prometheus-operator
+  # snip
+```
+
+`product2/helmfile.yaml`:
+
+```yaml
+releases:
+- name: product2-api
+  chart: product2-charts/api
+  # snip
+- name: product2-web
+  chart: product2-charts/web
+  # snip
+- name: observability-prometheus-operator
+  chart: stable/prometheus-operator
+  # snip
+- name: observability-process-exporter
+  chart: stable/prometheus-operator
+  # snip
+```
+
+You will (of course!) notice this isn't DRY.
+
+To remove the duplication of observability stack between the two helmfiles, create a "sub-helmfile" for the observability stack.
+
+`observability/helmfile.yaml`:
+
+```yaml
+- name: observability-prometheus-operator
+  chart: stable/prometheus-operator
+  # snip
+- name: observability-process-exporter
+  chart: stable/prometheus-operator
+  # snip
+```
+
+As you might have imagined, the observability helmfile can be reused from the two product helmfiles by declaring `helmfiles`.
+
+`product1/helmfile.yaml`:
+
+```yaml
+helmfiles:
+- ../observability/helmfile.yaml
+
+releases:
+- name: product1-api
+  chart: product1-charts/api
+  # snip
+- name: product1-web
+  chart: product1-charts/web
+  # snip
+```
+
+`product2/helmfile.yaml`:
+
+```yaml
+helmfiles:
+- ../observability/helmfile.yaml
+
+releases:
+- name: product2-api
+  chart: product2-charts/api
+  # snip
+- name: product2-web
+  chart: product2-charts/web
+  # snip
+```
+
+## Using sub-helmfile as a template
+
+You can go even further by generalizing the product related releases as a pair of `api` and `web`:
+
+`shared/helmfile.yaml`:
+
+```yaml
+releases:
+- name: product{{ env "PRODUCT_ID" }}-api
+  chart: product{{ env "PRODUCT_ID" }}-charts/api
+  # snip
+- name: product{{ env "PRODUCT_ID" }}-web
+  chart: product{{ env "PRODUCT_ID" }}-charts/web
+  # snip
+```
+
+Then you only need one single product helmfile
+
+
+`product/helmfile.yaml`:
+
+```yaml
+helmfiles:
+- ../observability/helmfile.yaml
+- ../shared/helmfile.yaml
+```
+
+Now that we use the environment variable `PRODUCT_ID` to as the parameters of release names, you need to set it before running `helmfile`, so that it produces the differently named releases per product:
+
+```console
+$ PRODUCT_ID=1 helmfile -f product/helmfile.yaml apply
+$ PRODUCT_ID=2 helmfile -f product/helmfile.yaml apply
+```

docs/writing-helmfile.md

@@ -0,0 +1,161 @@
+# The Helmfile Best Practices Guide
+
+This guide covers the Helmfile’s considered patterns for writing advanced helmfiles. It focuses on how helmfile should be structured and executed.
+
+## Missing keys and Default values
+
+helmfile tries its best to inform users for noticing potential mistakes.
+
+One example of how helmfile achieves it is that, `helmfile` fails when you tried to access missing keys in environment values.
+
+That is, the following example let `helmfile` fail when you have no `eventApi.replicas` defined in environment values.
+
+```
+{{ .Environment.Values.eventApi.replicas | default 1 }}
+```
+
+In case it isn't a mistake and you do want to allow missing keys, use the `getOrNil` template function:
+
+```
+{{ .Environment.Values | getOrNil "eventApi.replicas" }}
+```
+
+This result in printing `<no value` in your template, that may or may not result in a failure.
+
+If you want a kind of default values that is used when a missing key was referenced, use `default` like:
+
+```
+{{ .Environment.Values | getOrNil "eventApi.replicas" | default 1 }}
+```
+
+Now, you get `1` when there is no `eventApi.replicas` defined in environment values.
+
+## Release Template / Conventional Directory Structure
+
+Introducing helmfile into a large-scale project that involes dozens of releases often results in a lot of repetitions in `helmfile.yaml` files.
+
+The example below shows repetitions in `namespace`, `chart`, `values`, and `secrets`:
+
+```yaml
+releases:
+# *snip*
+- name: heapster
+  namespace: kube-system
+  chart: stable/heapster
+  version: 0.3.2
+  values:
+  - "./config/heapster/values.yaml"
+  - "./config/heapster/{{ .Environment.Name }}.yaml"
+  secrets:
+  - "./config/heapster/secrets.yaml"
+  - "./config/heapster/{{ .Environment.Name }}-secrets.yaml"
+
+- name: kubernetes-dashboard
+  namespace: kube-system
+  chart: stable/kubernetes-dashboard
+  version: 0.10.0
+  values:
+  - "./config/kubernetes-dashboard/values.yaml"
+  - "./config/kubernetes-dashboard/{{ .Environment.Name }}.yaml"
+  values:
+  - "./config/kubernetes-dashboard/secrets.yaml"
+  - "./config/kubernetes-dashboard/{{ .Environment.Name }}-secrets.yaml"
+```
+
+This is where Helmfile's advanced feature called Release Template comes handy.
+
+It allows you to abstract away the repetitions in releases into a template, which is then included and executed by using YAML anchor/alias:
+
+```yaml
+templates:
+  default: &default
+    chart: stable/{{`{{ .Release.Name }}`}}
+    namespace: kube-system
+    # This prevents helmfile exiting when it encounters a missing file
+    # Valid values are "Error", "Warn", "Info", "Debug". The default is "Error"
+    # Use "Debug" to make missing files errors invisible at the default log level(--log-level=INFO)
+    missingFileHandler: Warn
+    values:
+    - config/{{`{{ .Release.Name }}`}}/values.yaml
+    - config/{{`{{ .Release.Name }}`}}/{{`{{ .Environment.Name }}`}}.yaml
+    secrets:
+    - config/{{`{{ .Release.Name }}`}}/secrets.yaml
+    - config/{{`{{ .Release.Name }}`}}/{{`{{ .Environment.Name }}`}}-secrets.yaml
+
+releases:
+- name: heapster
+  <<: *default
+- name: kubernetes-dashboard
+  <<: *default
+```
+
+See the [issue 428](https://github.com/roboll/helmfile/issues/428) for more context on how this is supposed to work.
+
+## Layering
+
+You may occasionally end up with many helmfiles that shares common parts like which repositories to use, and whichi release to be bundled by default.
+
+Use Layering to extract the common parts into a dedicated *library helmfile*s, so that each helmfile becomes DRY.
+
+Let's assume that your `helmfile.yaml` looks like:
+
+```
+{ readFile "commons.yaml" }}
+---
+{{ readFile "environments.yaml" }}
+---
+releases:
+- name: myapp
+  chart: mychart
+```
+
+Whereas `commons.yaml` contained a monitoring agent:
+
+```yaml
+releases:
+- name: metricbaet
+  chart: stable/metricbeat
+```
+
+And `environments.yaml` contained well-known environments:
+
+```yaml
+environments:
+  development:
+  production:
+```
+
+At run time, template expressions in your `helmfile.yaml` are executed:
+
+```yaml
+releases:
+- name: metricbaet
+  chart: stable/metricbeat
+---
+environments:
+  development:
+  production:
+---
+releases:
+- name: myapp
+  chart: mychart
+```
+
+Resulting YAML documents are merged in the order of occurrence,
+so that your `helmfile.yaml` becomes:
+
+```yaml
+environments:
+  development:
+  production:
+
+releases:
+- name: metricbaet
+  chart: stable/metricbeat
+- name: myapp
+  chart: mychart
+```
+
+Great!
+
+Now, repeat the above steps for each your `helmfile.yaml`, so that all your helmfiles becomes DRY.

event/bus.go

@@ -0,0 +1,102 @@
+package event
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/environment"
+	"github.com/roboll/helmfile/helmexec"
+	"github.com/roboll/helmfile/tmpl"
+	"go.uber.org/zap"
+	"os"
+)
+
+type Hook struct {
+	Name    string   `yaml:"name"`
+	Events  []string `yaml:"events"`
+	Command string   `yaml:"command"`
+	Args    []string `yaml:"args"`
+}
+
+type event struct {
+	Name string
+}
+
+type Bus struct {
+	Runner helmexec.Runner
+	Hooks  []Hook
+
+	BasePath      string
+	StateFilePath string
+	Namespace     string
+
+	Env environment.Environment
+
+	ReadFile func(string) ([]byte, error)
+	Logger   *zap.SugaredLogger
+}
+
+func (bus *Bus) Trigger(evt string, context map[string]interface{}) (bool, error) {
+	if bus.Runner == nil {
+		bus.Runner = helmexec.ShellRunner{
+			Dir: bus.BasePath,
+		}
+	}
+
+	executed := false
+
+	for _, hook := range bus.Hooks {
+		contained := false
+		for _, e := range hook.Events {
+			contained = contained || e == evt
+		}
+		if !contained {
+			continue
+		}
+
+		var err error
+
+		name := hook.Name
+		if name == "" {
+			name = hook.Command
+		}
+
+		fmt.Fprintf(os.Stderr, "%s: basePath=%s\n", bus.StateFilePath, bus.BasePath)
+
+		data := map[string]interface{}{
+			"Environment": bus.Env,
+			"Namespace":   bus.Namespace,
+			"Event": event{
+				Name: evt,
+			},
+		}
+		for k, v := range context {
+			data[k] = v
+		}
+		render := tmpl.NewTextRenderer(bus.ReadFile, bus.BasePath, data)
+
+		bus.Logger.Debugf("hook[%s]: triggered by event \"%s\"\n", name, evt)
+
+		command, err := render.RenderTemplateText(hook.Command)
+		if err != nil {
+			return false, fmt.Errorf("hook[%s]: %v", name, err)
+		}
+
+		args := make([]string, len(hook.Args))
+		for i, raw := range hook.Args {
+			args[i], err = render.RenderTemplateText(raw)
+			if err != nil {
+				return false, fmt.Errorf("hook[%s]: %v", name, err)
+			}
+		}
+
+		bytes, err := bus.Runner.Execute(command, args, map[string]string{})
+		bus.Logger.Debugf("hook[%s]: %s\n", name, string(bytes))
+
+		if err != nil {
+			return false, fmt.Errorf("hook[%s]: command `%s` failed: %v", name, command, err)
+		}
+
+		executed = true
+	}
+
+	return executed, nil
+}

event/bus_test.go

@@ -0,0 +1,113 @@
+package event
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/environment"
+	"github.com/roboll/helmfile/helmexec"
+	"os"
+	"testing"
+)
+
+var logger = helmexec.NewLogger(os.Stdout, "warn")
+
+type runner struct {
+}
+
+func (r *runner) Execute(cmd string, args []string, env map[string]string) ([]byte, error) {
+	if cmd == "ng" {
+		return nil, fmt.Errorf("cmd failed due to invalid cmd: %s", cmd)
+	}
+	for _, a := range args {
+		if a == "ng" {
+			return nil, fmt.Errorf("cmd failed due to invalid arg: %s", a)
+		}
+	}
+	return []byte(""), nil
+}
+
+func TestTrigger(t *testing.T) {
+	cases := []struct {
+		name           string
+		hook           *Hook
+		triggeredEvt   string
+		expectedResult bool
+		expectedErr    string
+	}{
+		{
+			"okhook1",
+			&Hook{"okhook1", []string{"foo"}, "ok", []string{}},
+			"foo",
+			true,
+			"",
+		},
+		{
+			"missinghook1",
+			&Hook{"okhook1", []string{"foo"}, "ok", []string{}},
+			"bar",
+			false,
+			"",
+		},
+		{
+			"nohook1",
+			nil,
+			"bar",
+			false,
+			"",
+		},
+		{
+			"nghook1",
+			&Hook{"nghook1", []string{"foo"}, "ng", []string{}},
+			"foo",
+			false,
+			"hook[nghook1]: command `ng` failed: cmd failed due to invalid cmd: ng",
+		},
+		{
+			"nghook2",
+			&Hook{"nghook2", []string{"foo"}, "ok", []string{"ng"}},
+			"foo",
+			false,
+			"hook[nghook2]: command `ok` failed: cmd failed due to invalid arg: ng",
+		},
+	}
+	readFile := func(filename string) ([]byte, error) {
+		return nil, fmt.Errorf("unexpected call to readFile: %s", filename)
+	}
+	for _, c := range cases {
+		hooks := []Hook{}
+		if c.hook != nil {
+			hooks = append(hooks, *c.hook)
+		}
+		bus := &Bus{
+			Hooks:         hooks,
+			StateFilePath: "path/to/helmfile.yaml",
+			BasePath:      "path/to",
+			Namespace:     "myns",
+			Env:           environment.Environment{Name: "prod"},
+			Logger:        logger,
+			ReadFile:      readFile,
+		}
+
+		bus.Runner = &runner{}
+		data := map[string]interface{}{
+			"Release":         "myrel",
+			"HelmfileCommand": "mycmd",
+		}
+		ok, err := bus.Trigger(c.triggeredEvt, data)
+
+		if ok != c.expectedResult {
+			t.Errorf("unexpected result for case \"%s\": expected=%v, actual=%v", c.name, c.expectedResult, ok)
+		}
+
+		if c.expectedErr != "" {
+			if err == nil {
+				t.Error("error expected, but not occurred")
+			} else if err.Error() != c.expectedErr {
+				t.Errorf("unexpected error for case \"%s\": expected=%s, actual=%v", c.name, c.expectedErr, err)
+			}
+		} else {
+			if err != nil {
+				t.Errorf("unexpected error for case \"%s\": %v", c.name, err)
+			}
+		}
+	}
+}

go.mod

@@ -0,0 +1,23 @@
+module github.com/roboll/helmfile
+
+go 1.12
+
+require (
+	github.com/Masterminds/semver v1.4.1 // indirect
+	github.com/Masterminds/sprig v2.15.0+incompatible
+	github.com/aokoli/goutils v1.0.1 // indirect
+	github.com/google/go-cmp v0.3.0 // indirect
+	github.com/google/uuid v0.0.0-20161128191214-064e2069ce9c // indirect
+	github.com/huandu/xstrings v1.0.0 // indirect
+	github.com/imdario/mergo v0.3.6
+	github.com/mattn/go-runewidth v0.0.4 // indirect
+	github.com/pkg/errors v0.8.1 // indirect
+	github.com/tatsushid/go-prettytable v0.0.0-20141013043238-ed2d14c29939
+	github.com/urfave/cli v0.0.0-20160620154522-6011f165dc28
+	go.uber.org/atomic v1.3.2 // indirect
+	go.uber.org/multierr v1.1.0 // indirect
+	go.uber.org/zap v1.8.0
+	golang.org/x/crypto v0.0.0-20180403160946-b2aa35443fbc // indirect
+	gopkg.in/yaml.v2 v2.2.1
+	gotest.tools v2.2.0+incompatible
+)

go.sum

@@ -0,0 +1,35 @@
+github.com/Masterminds/semver v1.4.1 h1:CaDA1wAoM3rj9sAFyyZP37LloExUzxFGYt+DqJ870JA=
+github.com/Masterminds/semver v1.4.1/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
+github.com/Masterminds/sprig v2.15.0+incompatible h1:0gSxPGWS9PAr7U2NsQ2YQg6juRDINkUyuvbb4b2Xm8w=
+github.com/Masterminds/sprig v2.15.0+incompatible/go.mod h1:y6hNFY5UBTIWBxnzTeuNhlNS5hqE0NB0E6fgfo2Br3o=
+github.com/aokoli/goutils v1.0.1 h1:7fpzNGoJ3VA8qcrm++XEE1QUe0mIwNeLa02Nwq7RDkg=
+github.com/aokoli/goutils v1.0.1/go.mod h1:SijmP0QR8LtwsmDs8Yii5Z/S4trXFGFC2oO5g9DP+DQ=
+github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/uuid v0.0.0-20161128191214-064e2069ce9c h1:jWtZjFEUE/Bz0IeIhqCnyZ3HG6KRXSntXe4SjtuTH7c=
+github.com/google/uuid v0.0.0-20161128191214-064e2069ce9c/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/huandu/xstrings v1.0.0 h1:pO2K/gKgKaat5LdpAhxhluX2GPQMaI3W5FUz/I/UnWk=
+github.com/huandu/xstrings v1.0.0/go.mod h1:4qWG/gcEcfX4z/mBDHJ++3ReCw9ibxbsNJbcucJdbSo=
+github.com/imdario/mergo v0.3.6 h1:xTNEAn+kxVO7dTZGu0CegyqKZmoWFI0rF8UxjlB2d28=
+github.com/imdario/mergo v0.3.6/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
+github.com/mattn/go-runewidth v0.0.4 h1:2BvfKmzob6Bmd4YsL0zygOqfdFnK7GR4QL06Do4/p7Y=
+github.com/mattn/go-runewidth v0.0.4/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/tatsushid/go-prettytable v0.0.0-20141013043238-ed2d14c29939 h1:BhIUXV2ySTLrKgh/Hnts+QTQlIbWtomXt3LMdzME0A0=
+github.com/tatsushid/go-prettytable v0.0.0-20141013043238-ed2d14c29939/go.mod h1:omGxs4/6hNjxPKUTjmaNkPzehSnNJOJN6pMEbrlYIT4=
+github.com/urfave/cli v0.0.0-20160620154522-6011f165dc28 h1:Yf7/DcGM+61oLBGXQV2Q+ztEGBcOe3EUnbKSOn4fQuE=
+github.com/urfave/cli v0.0.0-20160620154522-6011f165dc28/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
+go.uber.org/atomic v1.3.2 h1:2Oa65PReHzfn29GpvgsYwloV9AVFHPDk8tYxt2c2tr4=
+go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
+go.uber.org/multierr v1.1.0 h1:HoEmRHQPVSqub6w2z2d2EOVs2fjyFRGyofhKuyDq0QI=
+go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
+go.uber.org/zap v1.8.0 h1:r6Za1Rii8+EGOYRDLvpooNOF6kP3iyDnkpzbw67gCQ8=
+go.uber.org/zap v1.8.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
+golang.org/x/crypto v0.0.0-20180403160946-b2aa35443fbc h1:Kx1Ke+iCR1aDjbWXgmEQGFxoHtNL49aRZGV7/+jJ41Y=
+golang.org/x/crypto v0.0.0-20180403160946-b2aa35443fbc/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
+gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=

hack/semtag

@@ -0,0 +1,623 @@
+#!/usr/bin/env bash
+
+PROG=semtag
+PROG_VERSION="v0.1.0"
+
+SEMVER_REGEX="^v?(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(\-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$"
+IDENTIFIER_REGEX="^\-([0-9A-Za-z-]+)\.([0-9A-Za-z-]+)*$"
+
+# Global variables
+FIRST_VERSION="v0.0.0"
+finalversion=$FIRST_VERSION
+lastversion=$FIRST_VERSION
+hasversiontag="false"
+scope="patch"
+displayonly="false"
+forcetag="false"
+forcedversion=
+versionname=
+identifier=
+
+HELP="\
+Usage:
+  $PROG
+  $PROG getlast
+  $PROG getfinal
+  $PROG (final|alpha|beta|candidate) [-s <scope> (major|minor|patch|auto) | -o]
+  $PROG --help
+  $PROG --version
+Options:
+  -s         The scope that must be increased, can be major, minor or patch.
+               The resulting version will match X.Y.Z(-PRERELEASE)(+BUILD)
+               where X, Y and Z are positive integers, PRERELEASE is an optionnal
+               string composed of alphanumeric characters describing if the build is
+               a release candidate, alpha or beta version, with a number.
+               BUILD is also an optional string composed of alphanumeric
+               characters and hyphens.
+               Setting the scope as 'auto', the script will chose the scope between
+               'minor' and 'patch', depending on the amount of lines added (<10% will
+               choose patch).
+  -v         Specifies manually the version to be tagged, must be a valid semantic version
+               in the format X.Y.Z where X, Y and Z are positive integers.
+  -o         Output the version only, shows the bumped version, but doesn't tag.
+  -f         Forces to tag, even if there are unstaged or uncommited changes.
+Commands:
+  --help     Print this help message.
+  --version  Prints the program's version.
+  get        Returns both current final version and last tagged version.
+  getlast    Returns the latest tagged version.
+  getfinal   Returns the latest tagged final version.
+  getcurrent Returns the current version, based on the latest one, if there are uncommited or
+               unstaged changes, they will be reflected in the version, adding the number of
+               pending commits, current branch and commit hash.
+  final      Tags the current build as a final version, this only can be done on the master branch.
+  candidate  Tags the current build as a release candidate, the tag will contain all
+               the commits from the last final version.
+  alpha      Tags the current build as an alpha version, the tag will contain all
+               the commits from the last final version.
+  beta       Tags the current build as a beta version, the tag will contain all
+               the commits from the last final version."
+
+# Commands and options
+ACTION="getlast"
+ACTION="$1"
+shift
+
+# We get the parameters
+while getopts "v:s:of" opt; do
+  case $opt in
+    v)
+      forcedversion="$OPTARG"
+      ;;
+    s)
+      scope="$OPTARG"
+      ;;
+    o)
+      displayonly="true"
+      ;;
+    f)
+      forcetag="true"
+      ;;
+    \?)
+      echo "Invalid option: -$OPTARG" >&2
+      exit 1
+      ;;
+    :)
+      echo "Option -$OPTARG requires an argument." >&2
+      exit 1
+      ;;
+  esac
+done
+
+# Gets a string with the version and returns an array of maximum size of 5 with all the parts of the sematinc version
+# $1 The string containing the version in semantic format
+# $2 The variable to store the result array:
+#      position 0: major number
+#      position 1: minor number
+#      position 2: patch number
+#      position 3: identifier (or prerelease identifier)
+#      position 4: build info
+function explode_version {
+  local __version=$1
+  local __result=$2
+  if [[ $__version =~ $SEMVER_REGEX ]] ; then
+    local __major=${BASH_REMATCH[1]}
+    local __minor=${BASH_REMATCH[2]}
+    local __patch=${BASH_REMATCH[3]}
+    local __prere=${BASH_REMATCH[4]}
+    local __build=${BASH_REMATCH[5]}
+    eval "$__result=(\"$__major\" \"$__minor\" \"$__patch\" \"$__prere\" \"$__build\")"
+  else
+    eval "$__result="
+  fi
+}
+
+# Compare two versions and returns -1, 0 or 1
+# $1 The first version to compare
+# $2 The second version to compare
+# $3 The variable where to store the result
+function compare_versions {
+  local __first
+  local __second
+  explode_version $1 __first
+  explode_version $2 __second
+  local lv=$3
+
+  # Compares MAJOR, MINOR and PATCH
+  for i in 0 1 2; do
+    local __numberfirst=${__first[$i]}
+    local __numbersecond=${__second[$i]}
+    case $(($__numberfirst - $__numbersecond)) in
+      0)
+        ;;
+      -[0-9]*)
+        eval "$lv=-1"
+        return 0
+        ;;
+      [0-9]*)
+        eval "$lv=1"
+        return 0
+        ;;
+    esac
+  done
+
+  # Identifiers should compare with the ASCII order.
+  local __identifierfirst=${__first[3]}
+  local __identifiersecond=${__second[3]}
+  if [[ -n "$__identifierfirst" ]] && [[ -n "$__identifiersecond" ]]; then
+    if [[ "$__identifierfirst" > "$__identifiersecond" ]]; then
+      eval "$lv=1"
+      return 0
+    elif [[ "$__identifierfirst" < "$__identifiersecond" ]]; then
+      eval "$lv=-1"
+      return 0
+    fi
+  elif [[ -z "$__identifierfirst" ]] && [[ -n "$__identifiersecond" ]]; then
+    eval "$lv=1"
+    return 0
+  elif [[ -n "$__identifierfirst" ]] && [[ -z "$__identifiersecond" ]]; then
+    eval "$lv=-1"
+    return 0
+  fi
+
+  eval "$lv=0"
+}
+
+# Returns the last version of two
+# $1 The first version to compare
+# $2 The second version to compare
+# $3 The variable where to store the last one
+function get_latest_of_two {
+  local __first=$1
+  local __second=$2
+  local __result
+  local __latest=$3
+  compare_versions $__first $__second __result
+  case $__result in
+    0)
+      eval "$__latest=$__second"
+      ;;
+    -1)
+      eval "$__latest=$__second"
+      ;;
+    1)
+      eval "$__latest=$__first"
+      ;;
+  esac
+}
+
+# Assigns a 2 size array with the identifier, having the identifier at pos 0, and the number in pos 1
+# $1 The identifier in the format -id.#
+# $2 The vferiable where to store the 2 size array
+function explode_identifier {
+  local __identifier=$1
+  local __result=$2
+  if [[ $__identifier =~ $IDENTIFIER_REGEX ]] ; then
+    local __id=${BASH_REMATCH[1]}
+    local __number=${BASH_REMATCH[2]}
+    if [[ -z "$__number" ]]; then
+      __number=1
+    fi
+    eval "$__result=(\"$__id\" \"$__number\")"
+  else
+    eval "$__result="
+  fi
+}
+
+# Gets a list of tags and assigns the base and latest versions
+# Receives an array with the tags containing the versions
+# Assigns to the global variables finalversion and lastversion the final version and the latest version
+function get_latest {
+  local __taglist=("$@")
+  local __tagsnumber=${#__taglist[@]}
+  local __current
+  case $__tagsnumber in
+    0)
+      finalversion=$FIRST_VERSION
+      lastversion=$FIRST_VERSION
+      ;;
+    1)
+      __current=${__taglist[0]}
+      explode_version $__current ver
+      if [ -n "$ver" ]; then
+        if [ -n "${ver[3]}" ]; then
+          finalversion=$FIRST_VERSION
+        else
+          finalversion=$__current
+        fi
+        lastversion=$__current
+      else
+        finalversion=$FIRST_VERSION
+        lastversion=$FIRST_VERSION
+      fi
+      ;;
+    *)
+      local __lastpos=$(($__tagsnumber-1))
+      for i in $(seq 0 $__lastpos)
+      do
+        __current=${__taglist[i]}
+        explode_version ${__taglist[i]} ver
+        if [ -n "$ver" ]; then
+          if [ -z "${ver[3]}" ]; then
+            get_latest_of_two $finalversion $__current finalversion
+            get_latest_of_two $lastversion $finalversion lastversion
+          else
+            get_latest_of_two $lastversion $__current lastversion
+          fi
+        fi
+      done
+      ;;
+  esac
+
+  if git rev-parse -q --verify "refs/tags/$lastversion" >/dev/null; then
+    hasversiontag="true"
+  else
+    hasversiontag="false"
+  fi
+}
+
+# Gets the next version given the provided scope
+# $1 The version that is going to be bumped
+# $2 The scope to bump
+# $3 The variable where to stoer the result
+function get_next_version {
+  local __exploded
+  local __fromversion=$1
+  local __scope=$2
+  local __result=$3
+  explode_version $__fromversion __exploded
+  case $__scope in
+    major)
+      __exploded[0]=$((${__exploded[0]}+1))
+      __exploded[1]=0
+      __exploded[2]=0
+    ;;
+    minor)
+      __exploded[1]=$((${__exploded[1]}+1))
+      __exploded[2]=0
+    ;;
+    patch)
+      __exploded[2]=$((${__exploded[2]}+1))
+    ;;
+  esac
+
+  eval "$__result=v${__exploded[0]}.${__exploded[1]}.${__exploded[2]}"
+}
+
+function bump_version {
+  ## First we try to get the next version based on the existing last one
+  if [ "$scope" == "auto" ]; then
+    get_scope_auto scope
+  fi
+
+  local __candidatefromlast=$FIRST_VERSION
+  local __explodedlast
+  explode_version $lastversion __explodedlast
+  if [[ -n "${__explodedlast[3]}" ]]; then
+    # Last version is not final
+    local __idlast
+    explode_identifier ${__explodedlast[3]} __idlast
+    
+    # We get the last, given the desired id based on the scope
+    __candidatefromlast="v${__explodedlast[0]}.${__explodedlast[1]}.${__explodedlast[2]}"
+    if [[ -n "$identifier" ]]; then
+      local __nextid="$identifier.1"
+      if [ "$identifier" == "${__idlast[0]}" ]; then
+        # We target the same identifier as the last so we increase one
+        __nextid="$identifier.$(( ${__idlast[1]}+1 ))"
+        __candidatefromlast="$__candidatefromlast-$__nextid"
+      else
+        # Different identifiers, we make sure we are assigning a higher identifier, if not, we increase the version
+        __candidatefromlast="$__candidatefromlast-$__nextid"
+        local __comparedwithlast
+        compare_versions $__candidatefromlast $lastversion __comparedwithlast
+        if [ "$__comparedwithlast" == -1 ]; then
+          get_next_version $__candidatefromlast $scope __candidatefromlast
+          __candidatefromlast="$__candidatefromlast-$__nextid"
+        fi
+      fi
+    fi
+  fi
+
+  # Then we try to get the version based on the latest final one
+  local __candidatefromfinal=$FIRST_VERSION
+  get_next_version $finalversion $scope __candidatefromfinal
+  if [[ -n "$identifier" ]]; then
+    __candidatefromfinal="$__candidatefromfinal-$identifier.1"
+  fi
+
+  # Finally we compare both candidates
+  local __resultversion
+  local __result
+  compare_versions $__candidatefromlast $__candidatefromfinal __result
+  case $__result in
+    0)
+      __resultversion=$__candidatefromlast
+      ;;
+    -1)
+      __resultversion="$__candidatefromfinal"
+      ;;
+    1)
+      __resultversion=$__candidatefromlast
+      ;;
+  esac
+
+  eval "$1=$__resultversion"
+}
+
+function increase_version {
+  local __version=
+
+  if [ -z $forcedversion ]; then
+    bump_version __version
+  else
+    if [[ $forcedversion =~ $SEMVER_REGEX ]] ; then
+      compare_versions $forcedversion $lastversion __result
+      if [ $__result -le 0 ]; then
+        echo "Version can't be lower than last version: $lastversion"
+        exit 1
+      fi
+    else
+      echo "Non valid version to bump"
+      exit 1
+    fi
+    __version=$forcedversion
+  fi
+
+  if [ "$displayonly" == "true" ]; then
+    echo "$__version"
+  else
+    if [ "$forcetag" == "false" ]; then
+      check_git_dirty_status
+    fi
+    local __commitlist
+    if [ "$finalversion" == "$FIRST_VERSION" ] || [ "$hasversiontag" != "true" ]; then
+      __commitlist="$(git log --pretty=oneline | cat)"
+    else
+      __commitlist="$(git log --pretty=oneline $finalversion... | cat)"
+    fi
+
+    # If we are forcing a bump, we add bump to the commit list
+    if [[ -z $__commitlist && "$forcetag" == "true" ]]; then
+      __commitlist="bump"
+    fi
+
+    if [[ -z $__commitlist ]]; then
+      echo "No commits since the last final version, not bumping version"
+    else
+      if [[ -z $versionname ]]; then
+        versionname=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+      fi
+      local __message="$versionname
+$__commitlist"
+
+      # We check we have info on the user
+      local __username=$(git config user.name)
+      if [ -z "$__username" ]; then
+        __username=$(id -u -n)
+        git config user.name $__username
+      fi
+      local __useremail=$(git config user.email)
+      if [ -z "$__useremail" ]; then
+        __useremail=$(hostname)
+        git config user.email "$__username@$__useremail"
+      fi
+
+      git tag -a $__version -m "$__message" 
+
+      # If we have a remote, we push there
+      local __remote=${SEMTAG_REMOTE:-$(git remote)}
+      if [[ -n $__remote ]]; then
+        git push $__remote $__version > /dev/null
+        if [ $? -eq 0 ]; then
+          echo "$__version"
+        else
+          echo "Error pushing the tag $__version to $__remote"
+          exit 1
+        fi
+      else
+        echo "$__version"
+      fi
+    fi
+  fi
+}
+
+function check_git_dirty_status {
+  local __repostatus=
+  get_work_tree_status __repostatus
+
+  if [ "$__repostatus" == "uncommitted" ]; then
+    echo "ERROR: You have uncommitted changes"
+    git status --porcelain
+    exit 1
+  fi
+
+  if [ "$__repostatus" == "unstaged" ]; then
+    echo "ERROR: You have unstaged changes"
+    git status --porcelain
+    exit 1
+  fi
+}
+
+# Get the total amount of lines of code in the repo
+function get_total_lines {
+  local __empty_id="$(git hash-object -t tree /dev/null)"
+  local __changes="$(git diff --numstat $__empty_id | cat)"
+  local __added_deleted=$1
+  get_changed_lines "$__changes" $__added_deleted
+}
+
+# Get the total amount of lines of code since the provided tag
+function get_sincetag_lines {
+  local __sincetag=$1
+  local __changes="$(git diff --numstat $__sincetag | cat)"
+  local __added_deleted=$2
+  get_changed_lines "$__changes" $__added_deleted
+}
+
+function get_changed_lines {
+  local __changes_numstat=$1
+  local __result=$2
+  IFS=$'\n' read -rd '' -a __changes_array <<<"$__changes_numstat"
+  local __diff_regex="^([0-9]+)[[:space:]]+([0-9]+)[[:space:]]+.+$"
+
+  local __total_added=0
+  local __total_deleted=0
+  for i in "${__changes_array[@]}"
+  do
+    if [[ $i =~ $__diff_regex ]] ; then
+      local __added=${BASH_REMATCH[1]}
+      local __deleted=${BASH_REMATCH[2]}
+      __total_added=$(( $__total_added+$__added ))
+      __total_deleted=$(( $__total_deleted+$__deleted ))
+    fi
+  done
+  eval "$2=( $__total_added $__total_deleted )"
+}
+
+function get_scope_auto {
+  local __verbose=$2
+  local __total=0
+  local __since=0
+  local __scope=
+
+  get_total_lines __total
+  get_sincetag_lines $finalversion __since
+
+  local __percentage=0
+  if [ "$__total" != "0" ]; then
+    local __percentage=$(( 100*$__since/$__total ))
+    if [ $__percentage -gt "10" ]; then
+      __scope="minor"
+    else
+      __scope="patch"
+    fi
+  fi
+
+  eval "$1=$__scope"
+  if [[ -n "$__verbose" ]]; then
+    echo "[Auto Scope] Percentage of lines changed: $__percentage"
+    echo "[Auto Scope] : $__scope"
+  fi
+}
+
+function get_work_tree_status {
+  # Update the index
+  git update-index -q --ignore-submodules --refresh > /dev/null
+  eval "$1="
+
+  if ! git diff-files --quiet --ignore-submodules -- > /dev/null
+  then
+    eval "$1=unstaged"
+  fi
+
+  if ! git diff-index --cached --quiet HEAD --ignore-submodules -- > /dev/null
+  then
+    eval "$1=uncommitted"
+  fi
+}
+
+function get_current {
+  if [ "$hasversiontag" == "true" ]; then
+    local __commitcount="$(git rev-list $lastversion.. --count)"
+  else
+    local __commitcount="$(git rev-list --count HEAD)"
+  fi
+  local __status=
+  get_work_tree_status __status
+  
+  if [ "$__commitcount" == "0" ] && [ -z "$__status" ]; then
+    eval "$1=$lastversion"
+  else
+    local __buildinfo="$(git rev-parse --short HEAD)"
+    local __currentbranch="$(git rev-parse --abbrev-ref HEAD)"
+    if [ "$__currentbranch" != "master" ]; then
+      __buildinfo="$__currentbranch.$__buildinfo"
+    fi
+
+    local __suffix=
+    if [ "$__commitcount" != "0" ]; then
+      if [ -n "$__suffix" ]; then
+        __suffix="$__suffix."
+      fi
+      __suffix="$__suffix$__commitcount"
+    fi
+    if [ -n "$__status" ]; then
+      if [ -n "$__suffix" ]; then
+        __suffix="$__suffix."
+      fi
+      __suffix="$__suffix$__status"
+    fi
+
+    __suffix="$__suffix+$__buildinfo"
+    if [ "$lastversion" == "$finalversion" ]; then
+      scope="patch"
+      identifier=
+      local __bumped=
+      bump_version __bumped
+      eval "$1=$__bumped-dev.$__suffix"
+    else
+      eval "$1=$lastversion.$__suffix"
+    fi
+  fi
+}
+
+function init {
+  git fetch > /dev/null
+  TAGS="$(git tag)"
+  IFS=$'\n' read -rd '' -a TAG_ARRAY <<<"$TAGS"
+
+  get_latest ${TAG_ARRAY[@]}
+  currentbranch="$(git rev-parse --abbrev-ref HEAD)"
+}
+
+case $ACTION in
+  --help)
+    echo -e "$HELP"
+    ;;
+  --version)
+    echo -e "${PROG}: $PROG_VERSION"
+    ;;
+  final)
+    init
+    diff=$(git diff master | cat)
+    if [ "$forcetag" == "false" ]; then
+      if [ -n "$diff" ]; then
+        echo "ERROR: Branch must be updated with master for final versions"
+        exit 1
+      fi
+    fi
+    increase_version
+    ;;
+  alpha|beta)
+    init
+    identifier="$ACTION"
+    increase_version
+    ;;
+  candidate)
+    init
+    identifier="rc"
+    increase_version
+    ;;
+  getlast)
+    init
+    echo "$lastversion"
+    ;;
+  getfinal)
+    init
+    echo "$finalversion"
+    ;;
+  getcurrent)
+    init
+    get_current current
+    echo "$current"
+    ;;
+  get)
+    init
+    echo "Current final version: $finalversion"
+    echo "Last tagged version:   $lastversion"
+    ;;
+  *)
+    echo "'$ACTION' is not a valid command, see --help for available commands."
+    ;;
+esac

helmexec/context.go

@@ -0,0 +1,44 @@
+package helmexec
+
+import (
+	"os"
+	"path/filepath"
+)
+
+type HelmContext struct {
+	Tillerless      bool
+	TillerNamespace string
+	WorkerIndex     int
+}
+
+func (context *HelmContext) GetTillerlessArgs(helmBinary string) []string {
+	if context.Tillerless {
+		if context.TillerNamespace != "" {
+			return []string{"tiller", "run", context.TillerNamespace, "--", helmBinary}
+		} else {
+			return []string{"tiller", "run", "--", helmBinary}
+		}
+	} else {
+		return []string{}
+	}
+}
+
+func (context *HelmContext) getTillerlessEnv() map[string]string {
+	if context.Tillerless {
+		result := map[string]string{
+			"HELM_TILLER_SILENT": "true",
+			// Changing the TILLER port doesn't really work: https://github.com/helm/helm/issues/3159
+			// So this is not used for the moment.
+			// "HELM_TILLER_PORT":   strconv.Itoa(44134 + context.WorkerIndex),
+		}
+		if config := os.Getenv("KUBECONFIG"); config != "" {
+			absConfig, err := filepath.Abs(config)
+			if err == nil {
+				result["KUBECONFIG"] = absConfig
+			}
+		}
+		return result
+	} else {
+		return map[string]string{}
+	}
+}

helmexec/exec.go

@@ -6,9 +6,10 @@ import (
 	"os"
 	"strings"
 
+	"sync"
+
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
-	"sync"
 )
 
 const (
@@ -69,47 +70,72 @@ func (helm *execer) AddRepo(name, repository, certfile, keyfile, username, passw
 		args = append(args, "--username", username, "--password", password)
 	}
 	helm.logger.Infof("Adding repo %v %v", name, repository)
-	out, err := helm.exec(args...)
+	out, err := helm.exec(args, map[string]string{})
 	helm.write(out)
 	return err
 }
 
 func (helm *execer) UpdateRepo() error {
 	helm.logger.Info("Updating repo")
-	out, err := helm.exec("repo", "update")
+	out, err := helm.exec([]string{"repo", "update"}, map[string]string{})
 	helm.write(out)
 	return err
 }
 
 func (helm *execer) UpdateDeps(chart string) error {
 	helm.logger.Infof("Updating dependency %v", chart)
-	out, err := helm.exec("dependency", "update", chart)
+	out, err := helm.exec([]string{"dependency", "update", chart}, map[string]string{})
 	helm.write(out)
 	return err
 }
 
-func (helm *execer) SyncRelease(name, chart string, flags ...string) error {
+func (helm *execer) BuildDeps(chart string) error {
+	helm.logger.Infof("Building dependency %v", chart)
+	out, err := helm.exec([]string{"dependency", "build", chart}, map[string]string{})
+	helm.write(out)
+	return err
+}
+
+func (helm *execer) SyncRelease(context HelmContext, name, chart string, flags ...string) error {
 	helm.logger.Infof("Upgrading %v", chart)
-	out, err := helm.exec(append([]string{"upgrade", "--install", "--reset-values", name, chart}, flags...)...)
+	preArgs := context.GetTillerlessArgs(helm.helmBinary)
+	env := context.getTillerlessEnv()
+	out, err := helm.exec(append(append(preArgs, "upgrade", "--install", "--reset-values", name, chart), flags...), env)
 	helm.write(out)
 	return err
 }
 
-func (helm *execer) ReleaseStatus(name string) error {
+func (helm *execer) ReleaseStatus(context HelmContext, name string, flags ...string) error {
 	helm.logger.Infof("Getting status %v", name)
-	out, err := helm.exec(append([]string{"status", name})...)
+	preArgs := context.GetTillerlessArgs(helm.helmBinary)
+	env := context.getTillerlessEnv()
+	out, err := helm.exec(append(append(preArgs, "status", name), flags...), env)
 	helm.write(out)
 	return err
 }
 
-func (helm *execer) DecryptSecret(name string) (string, error) {
+func (helm *execer) List(context HelmContext, filter string, flags ...string) (string, error) {
+	helm.logger.Infof("Listing releases matching %v", filter)
+	preArgs := context.GetTillerlessArgs(helm.helmBinary)
+	env := context.getTillerlessEnv()
+	out, err := helm.exec(append(append(preArgs, "list", filter), flags...), env)
+	helm.write(out)
+	return string(out), err
+}
+
+func (helm *execer) DecryptSecret(context HelmContext, name string, flags ...string) (string, error) {
 	// Prevents https://github.com/roboll/helmfile/issues/258
 	helm.decryptionMutex.Lock()
 	defer helm.decryptionMutex.Unlock()
 
 	helm.logger.Infof("Decrypting secret %v", name)
-	out, err := helm.exec(append([]string{"secrets", "dec", name})...)
+	preArgs := context.GetTillerlessArgs(helm.helmBinary)
+	env := context.getTillerlessEnv()
+	out, err := helm.exec(append(append(preArgs, "secrets", "dec", name), flags...), env)
 	helm.write(out)
+	if err != nil {
+		return "", err
+	}
 
 	tmpFile, err := ioutil.TempFile("", "secret")
 	if err != nil {
@@ -143,42 +169,54 @@ func (helm *execer) DecryptSecret(name string) (string, error) {
 	return tmpFile.Name(), err
 }
 
-func (helm *execer) DiffRelease(name, chart string, flags ...string) error {
+func (helm *execer) TemplateRelease(chart string, flags ...string) error {
+	out, err := helm.exec(append([]string{"template", chart}, flags...), map[string]string{})
+	helm.write(out)
+	return err
+}
+
+func (helm *execer) DiffRelease(context HelmContext, name, chart string, flags ...string) error {
 	helm.logger.Infof("Comparing %v %v", name, chart)
-	out, err := helm.exec(append([]string{"diff", "upgrade", "--allow-unreleased", name, chart}, flags...)...)
+	preArgs := context.GetTillerlessArgs(helm.helmBinary)
+	env := context.getTillerlessEnv()
+	out, err := helm.exec(append(append(preArgs, "diff", "upgrade", "--allow-unreleased", name, chart), flags...), env)
 	helm.write(out)
 	return err
 }
 
 func (helm *execer) Lint(chart string, flags ...string) error {
 	helm.logger.Infof("Linting %v", chart)
-	out, err := helm.exec(append([]string{"lint", chart}, flags...)...)
+	out, err := helm.exec(append([]string{"lint", chart}, flags...), map[string]string{})
 	helm.write(out)
 	return err
 }
 
 func (helm *execer) Fetch(chart string, flags ...string) error {
 	helm.logger.Infof("Fetching %v", chart)
-	out, err := helm.exec(append([]string{"fetch", chart}, flags...)...)
+	out, err := helm.exec(append([]string{"fetch", chart}, flags...), map[string]string{})
 	helm.write(out)
 	return err
 }
 
-func (helm *execer) DeleteRelease(name string, flags ...string) error {
+func (helm *execer) DeleteRelease(context HelmContext, name string, flags ...string) error {
 	helm.logger.Infof("Deleting %v", name)
-	out, err := helm.exec(append([]string{"delete", name}, flags...)...)
+	preArgs := context.GetTillerlessArgs(helm.helmBinary)
+	env := context.getTillerlessEnv()
+	out, err := helm.exec(append(append(preArgs, "delete", name), flags...), env)
 	helm.write(out)
 	return err
 }
 
-func (helm *execer) TestRelease(name string, flags ...string) error {
+func (helm *execer) TestRelease(context HelmContext, name string, flags ...string) error {
 	helm.logger.Infof("Testing %v", name)
-	out, err := helm.exec(append([]string{"test", name}, flags...)...)
+	preArgs := context.GetTillerlessArgs(helm.helmBinary)
+	env := context.getTillerlessEnv()
+	out, err := helm.exec(append(append(preArgs, "test", name), flags...), env)
 	helm.write(out)
 	return err
 }
 
-func (helm *execer) exec(args ...string) ([]byte, error) {
+func (helm *execer) exec(args []string, env map[string]string) ([]byte, error) {
 	cmdargs := args
 	if len(helm.extra) > 0 {
 		cmdargs = append(cmdargs, helm.extra...)
@@ -187,7 +225,7 @@ func (helm *execer) exec(args ...string) ([]byte, error) {
 		cmdargs = append(cmdargs, "--kube-context", helm.kubeContext)
 	}
 	helm.logger.Debugf("exec: %s %s", helm.helmBinary, strings.Join(cmdargs, " "))
-	return helm.runner.Execute(helm.helmBinary, cmdargs)
+	return helm.runner.Execute(helm.helmBinary, cmdargs, env)
 }
 
 func (helm *execer) write(out []byte) {

helmexec/exec_test.go

@@ -3,6 +3,7 @@ package helmexec
 import (
 	"bytes"
 	"os"
+	"path"
 	"reflect"
 	"testing"
 
@@ -16,7 +17,7 @@ type mockRunner struct {
 	err    error
 }
 
-func (mock *mockRunner) Execute(cmd string, args []string) ([]byte, error) {
+func (mock *mockRunner) Execute(cmd string, args []string, env map[string]string) ([]byte, error) {
 	return []byte{}, nil
 }
 
@@ -118,7 +119,7 @@ func Test_SyncRelease(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "dev")
-	helm.SyncRelease("release", "chart", "--timeout 10", "--wait")
+	helm.SyncRelease(HelmContext{}, "release", "chart", "--timeout 10", "--wait")
 	expected := `Upgrading chart
 exec: helm upgrade --install --reset-values release chart --timeout 10 --wait --kube-context dev
 `
@@ -127,7 +128,7 @@ exec: helm upgrade --install --reset-values release chart --timeout 10 --wait --
 	}
 
 	buffer.Reset()
-	helm.SyncRelease("release", "chart")
+	helm.SyncRelease(HelmContext{}, "release", "chart")
 	expected = `Upgrading chart
 exec: helm upgrade --install --reset-values release chart --kube-context dev
 `
@@ -136,6 +137,20 @@ exec: helm upgrade --install --reset-values release chart --kube-context dev
 	}
 }
 
+func Test_SyncReleaseTillerless(t *testing.T) {
+	var buffer bytes.Buffer
+	logger := NewLogger(&buffer, "debug")
+	helm := MockExecer(logger, "dev")
+	helm.SyncRelease(HelmContext{Tillerless: true, TillerNamespace: "foo"}, "release", "chart",
+		"--timeout 10", "--wait")
+	expected := `Upgrading chart
+exec: helm tiller run foo -- helm upgrade --install --reset-values release chart --timeout 10 --wait --kube-context dev
+`
+	if buffer.String() != expected {
+		t.Errorf("helmexec.SyncRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
+	}
+}
+
 func Test_UpdateDeps(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
@@ -159,11 +174,34 @@ exec: helm dependency update ./chart/foo --verify --kube-context dev
 	}
 }
 
+func Test_BuildDeps(t *testing.T) {
+	var buffer bytes.Buffer
+	logger := NewLogger(&buffer, "debug")
+	helm := MockExecer(logger, "dev")
+	helm.BuildDeps("./chart/foo")
+	expected := `Building dependency ./chart/foo
+exec: helm dependency build ./chart/foo --kube-context dev
+`
+	if buffer.String() != expected {
+		t.Errorf("helmexec.BuildDeps()\nactual = %v\nexpect = %v", buffer.String(), expected)
+	}
+
+	buffer.Reset()
+	helm.SetExtraArgs("--verify")
+	helm.BuildDeps("./chart/foo")
+	expected = `Building dependency ./chart/foo
+exec: helm dependency build ./chart/foo --verify --kube-context dev
+`
+	if buffer.String() != expected {
+		t.Errorf("helmexec.BuildDeps()\nactual = %v\nexpect = %v", buffer.String(), expected)
+	}
+}
+
 func Test_DecryptSecret(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "dev")
-	helm.DecryptSecret("secretName")
+	helm.DecryptSecret(HelmContext{}, "secretName")
 	expected := `Decrypting secret secretName
 exec: helm secrets dec secretName --kube-context dev
 `
@@ -176,7 +214,7 @@ func Test_DiffRelease(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "dev")
-	helm.DiffRelease("release", "chart", "--timeout 10", "--wait")
+	helm.DiffRelease(HelmContext{}, "release", "chart", "--timeout 10", "--wait")
 	expected := `Comparing release chart
 exec: helm diff upgrade --allow-unreleased release chart --timeout 10 --wait --kube-context dev
 `
@@ -185,7 +223,7 @@ exec: helm diff upgrade --allow-unreleased release chart --timeout 10 --wait --k
 	}
 
 	buffer.Reset()
-	helm.DiffRelease("release", "chart")
+	helm.DiffRelease(HelmContext{}, "release", "chart")
 	expected = `Comparing release chart
 exec: helm diff upgrade --allow-unreleased release chart --kube-context dev
 `
@@ -194,11 +232,24 @@ exec: helm diff upgrade --allow-unreleased release chart --kube-context dev
 	}
 }
 
+func Test_DiffReleaseTillerless(t *testing.T) {
+	var buffer bytes.Buffer
+	logger := NewLogger(&buffer, "debug")
+	helm := MockExecer(logger, "dev")
+	helm.DiffRelease(HelmContext{Tillerless: true}, "release", "chart", "--timeout 10", "--wait")
+	expected := `Comparing release chart
+exec: helm tiller run -- helm diff upgrade --allow-unreleased release chart --timeout 10 --wait --kube-context dev
+`
+	if buffer.String() != expected {
+		t.Errorf("helmexec.DiffRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
+	}
+}
+
 func Test_DeleteRelease(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "dev")
-	helm.DeleteRelease("release")
+	helm.DeleteRelease(HelmContext{}, "release")
 	expected := `Deleting release
 exec: helm delete release --kube-context dev
 `
@@ -210,7 +261,7 @@ func Test_DeleteRelease_Flags(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "dev")
-	helm.DeleteRelease("release", "--purge")
+	helm.DeleteRelease(HelmContext{}, "release", "--purge")
 	expected := `Deleting release
 exec: helm delete release --purge --kube-context dev
 `
@@ -223,7 +274,7 @@ func Test_TestRelease(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "dev")
-	helm.TestRelease("release")
+	helm.TestRelease(HelmContext{}, "release")
 	expected := `Testing release
 exec: helm test release --kube-context dev
 `
@@ -235,7 +286,7 @@ func Test_TestRelease_Flags(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "dev")
-	helm.TestRelease("release", "--cleanup", "--timeout", "60")
+	helm.TestRelease(HelmContext{}, "release", "--cleanup", "--timeout", "60")
 	expected := `Testing release
 exec: helm test release --cleanup --timeout 60 --kube-context dev
 `
@@ -248,7 +299,7 @@ func Test_ReleaseStatus(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "dev")
-	helm.ReleaseStatus("myRelease")
+	helm.ReleaseStatus(HelmContext{}, "myRelease")
 	expected := `Getting status myRelease
 exec: helm status myRelease --kube-context dev
 `
@@ -261,28 +312,29 @@ func Test_exec(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "")
-	helm.exec("version")
+	env := map[string]string{}
+	helm.exec([]string{"version"}, env)
 	expected := "exec: helm version\n"
 	if buffer.String() != expected {
 		t.Errorf("helmexec.exec()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}
 
 	helm = MockExecer(logger, "dev")
-	ret, _ := helm.exec("diff")
+	ret, _ := helm.exec([]string{"diff"}, env)
 	if len(ret) != 0 {
 		t.Error("helmexec.exec() - expected empty return value")
 	}
 
 	buffer.Reset()
 	helm = MockExecer(logger, "dev")
-	helm.exec("diff", "release", "chart", "--timeout 10", "--wait")
+	helm.exec([]string{"diff", "release", "chart", "--timeout 10", "--wait"}, env)
 	expected = "exec: helm diff release chart --timeout 10 --wait --kube-context dev\n"
 	if buffer.String() != expected {
 		t.Errorf("helmexec.exec()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}
 
 	buffer.Reset()
-	helm.exec("version")
+	helm.exec([]string{"version"}, env)
 	expected = "exec: helm version --kube-context dev\n"
 	if buffer.String() != expected {
 		t.Errorf("helmexec.exec()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -290,7 +342,7 @@ func Test_exec(t *testing.T) {
 
 	buffer.Reset()
 	helm.SetExtraArgs("foo")
-	helm.exec("version")
+	helm.exec([]string{"version"}, env)
 	expected = "exec: helm version foo --kube-context dev\n"
 	if buffer.String() != expected {
 		t.Errorf("helmexec.exec()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -299,7 +351,7 @@ func Test_exec(t *testing.T) {
 	buffer.Reset()
 	helm = MockExecer(logger, "")
 	helm.SetHelmBinary("overwritten")
-	helm.exec("version")
+	helm.exec([]string{"version"}, env)
 	expected = "exec: overwritten version\n"
 	if buffer.String() != expected {
 		t.Errorf("helmexec.exec()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -353,3 +405,37 @@ func Test_LogLevels(t *testing.T) {
 		}
 	}
 }
+
+func Test_getTillerlessEnv(t *testing.T) {
+	context := HelmContext{Tillerless: true, TillerNamespace: "foo", WorkerIndex: 1}
+
+	os.Unsetenv("KUBECONFIG")
+	actual := context.getTillerlessEnv()
+	if val, found := actual["HELM_TILLER_SILENT"]; !found || val != "true" {
+		t.Errorf("getTillerlessEnv() HELM_TILLER_SILENT\nactual = %s\nexpect = true", val)
+	}
+	// This feature is disabled until it is fixed in helm
+	/*if val, found := actual["HELM_TILLER_PORT"]; !found || val != "44135" {
+		t.Errorf("getTillerlessEnv() HELM_TILLER_PORT\nactual = %s\nexpect = 44135", val)
+	}*/
+	if val, found := actual["KUBECONFIG"]; found {
+		t.Errorf("getTillerlessEnv() KUBECONFIG\nactual = %s\nexpect = nil", val)
+	}
+
+	os.Setenv("KUBECONFIG", "toto")
+	actual = context.getTillerlessEnv()
+	cwd, _ := os.Getwd()
+	expected := path.Join(cwd, "toto")
+	if val, found := actual["KUBECONFIG"]; !found || val != expected {
+		t.Errorf("getTillerlessEnv() KUBECONFIG\nactual = %s\nexpect = %s", val, expected)
+	}
+	os.Unsetenv("KUBECONFIG")
+}
+
+func Test_mergeEnv(t *testing.T) {
+	actual := env2map(mergeEnv([]string{"A=1", "B=c=d", "E=2"}, map[string]string{"B": "3", "F": "4"}))
+	expected := map[string]string{"A": "1", "B": "3", "E": "2", "F": "4"}
+	if !reflect.DeepEqual(actual, expected) {
+		t.Errorf("mergeEnv()\nactual = %v\nexpect = %v", actual, expected)
+	}
+}

helmexec/helmexec.go

@@ -7,14 +7,16 @@ type Interface interface {
 
 	AddRepo(name, repository, certfile, keyfile, username, password string) error
 	UpdateRepo() error
+	BuildDeps(chart string) error
 	UpdateDeps(chart string) error
-	SyncRelease(name, chart string, flags ...string) error
-	DiffRelease(name, chart string, flags ...string) error
+	SyncRelease(context HelmContext, name, chart string, flags ...string) error
+	DiffRelease(context HelmContext, name, chart string, flags ...string) error
+	TemplateRelease(chart string, flags ...string) error
 	Fetch(chart string, flags ...string) error
 	Lint(chart string, flags ...string) error
-	ReleaseStatus(name string) error
-	DeleteRelease(name string, flags ...string) error
-	TestRelease(name string, flags ...string) error
-
-	DecryptSecret(name string) (string, error)
+	ReleaseStatus(context HelmContext, name string, flags ...string) error
+	DeleteRelease(context HelmContext, name string, flags ...string) error
+	TestRelease(context HelmContext, name string, flags ...string) error
+	List(context HelmContext, filter string, flags ...string) (string, error)
+	DecryptSecret(context HelmContext, name string, flags ...string) (string, error)
 }

helmexec/runner.go

@@ -1,7 +1,9 @@
 package helmexec
 
 import (
+	"os"
 	"os/exec"
+	"strings"
 )
 
 const (
@@ -11,14 +13,43 @@ const (
 
 // Runner interface for shell commands
 type Runner interface {
-	Execute(cmd string, args []string) ([]byte, error)
+	Execute(cmd string, args []string, env map[string]string) ([]byte, error)
 }
 
 // ShellRunner implemention for shell commands
-type ShellRunner struct{}
+type ShellRunner struct {
+	Dir string
+}
 
 // Execute a shell command
-func (shell ShellRunner) Execute(cmd string, args []string) ([]byte, error) {
+func (shell ShellRunner) Execute(cmd string, args []string, env map[string]string) ([]byte, error) {
 	preparedCmd := exec.Command(cmd, args...)
+	preparedCmd.Dir = shell.Dir
+	preparedCmd.Env = mergeEnv(os.Environ(), env)
 	return preparedCmd.CombinedOutput()
 }
+
+func mergeEnv(orig []string, new map[string]string) []string {
+	wanted := env2map(orig)
+	for k, v := range new {
+		wanted[k] = v
+	}
+	return map2env(wanted)
+}
+
+func map2env(wanted map[string]string) []string {
+	result := []string{}
+	for k, v := range wanted {
+		result = append(result, k+"="+v)
+	}
+	return result
+}
+
+func env2map(env []string) map[string]string {
+	wanted := map[string]string{}
+	for _, cur := range env {
+		pair := strings.SplitN(cur, "=", 2)
+		wanted[pair[0]] = pair[1]
+	}
+	return wanted
+}

main.go

@@ -2,30 +2,16 @@ package main
 
 import (
 	"fmt"
-	"log"
-	"os"
-	"os/signal"
-	"path/filepath"
-	"sort"
-	"syscall"
-
-	"os/exec"
-
 	"github.com/roboll/helmfile/args"
-	"github.com/roboll/helmfile/environment"
+	"github.com/roboll/helmfile/cmd"
 	"github.com/roboll/helmfile/helmexec"
+	"github.com/roboll/helmfile/pkg/app"
 	"github.com/roboll/helmfile/state"
-	"github.com/roboll/helmfile/tmpl"
 	"github.com/urfave/cli"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
-	"io/ioutil"
-)
-
-const (
-	DefaultHelmfile          = "helmfile.yaml"
-	DeprecatedHelmfile       = "charts.yaml"
-	DefaultHelmfileDirectory = "helmfile.d"
+	"os"
+	"strings"
 )
 
 var Version string
@@ -56,11 +42,11 @@ func configureLogging(c *cli.Context) error {
 
 func main() {
 
-	app := cli.NewApp()
-	app.Name = "helmfile"
-	app.Usage = ""
-	app.Version = Version
-	app.Flags = []cli.Flag{
+	cliApp := cli.NewApp()
+	cliApp.Name = "helmfile"
+	cliApp.Usage = ""
+	cliApp.Version = Version
+	cliApp.Flags = []cli.Flag{
 		cli.StringFlag{
 			Name:  "helm-binary, b",
 			Usage: "path to helm binary",
@@ -87,7 +73,7 @@ func main() {
 		},
 		cli.StringFlag{
 			Name:  "namespace, n",
-			Usage: "Set namespace. Uses the namespace set in the context by default",
+			Usage: "Set namespace. Uses the namespace set in the context by default, and is available in templates as {{ .Namespace }}",
 		},
 		cli.StringSliceFlag{
 			Name: "selector, l",
@@ -96,10 +82,14 @@ func main() {
 	--selector tier=frontend,tier!=proxy --selector tier=backend. Will match all frontend, non-proxy releases AND all backend releases.
 	The name of a release can be used as a label. --selector name=myrelease`,
 		},
+		cli.BoolFlag{
+			Name:  "interactive, i",
+			Usage: "Request confirmation before attempting to modify clusters",
+		},
 	}
 
-	app.Before = configureLogging
-	app.Commands = []cli.Command{
+	cliApp.Before = configureLogging
+	cliApp.Commands = []cli.Command{
 		{
 			Name:  "repos",
 			Usage: "sync repositories from state file (helm repo add && helm repo update)",
@@ -111,22 +101,23 @@ func main() {
 				},
 			},
 			Action: func(c *cli.Context) error {
-				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface) []error {
+				return cmd.VisitAllDesiredStates(c, func(state *state.HelmState, helm helmexec.Interface, ctx app.Context) (bool, []error) {
 					args := args.GetArgs(c.String("args"), state)
 					if len(args) > 0 {
 						helm.SetExtraArgs(args...)
 					}
-					if c.GlobalString("helm-binary") != "" {
-						helm.SetHelmBinary(c.GlobalString("helm-binary"))
-					}
 
-					return state.SyncRepos(helm)
+					errs := ctx.SyncReposOnce(state, helm)
+
+					ok := len(state.Repositories) > 0 && len(errs) == 0
+
+					return ok, errs
 				})
 			},
 		},
 		{
 			Name:  "charts",
-			Usage: "sync releases from state file (helm upgrade --install)",
+			Usage: "DEPRECATED: sync releases from state file (helm upgrade --install)",
 			Flags: []cli.Flag{
 				cli.StringFlag{
 					Name:  "args",
@@ -144,20 +135,12 @@ func main() {
 				},
 			},
 			Action: func(c *cli.Context) error {
-				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface) []error {
-					args := args.GetArgs(c.String("args"), state)
-					if len(args) > 0 {
-						helm.SetExtraArgs(args...)
-					}
-					if c.GlobalString("helm-binary") != "" {
-						helm.SetHelmBinary(c.GlobalString("helm-binary"))
-					}
-
-					values := c.StringSlice("values")
-					workers := c.Int("concurrency")
-
-					return state.SyncReleases(helm, values, workers)
+				affectedReleases := state.AffectedReleases{}
+				errs := findAndIterateOverDesiredStatesUsingFlags(c, func(st *state.HelmState, helm helmexec.Interface, _ app.Context) []error {
+					return executeSyncCommand(c, &affectedReleases, st, helm)
 				})
+				affectedReleases.DisplayAffectedReleases(c.App.Metadata["logger"].(*zap.SugaredLogger))
+				return errs
 			},
 		},
 		{
@@ -174,8 +157,8 @@ func main() {
 					Usage: "additional value files to be merged into the command",
 				},
 				cli.BoolFlag{
-					Name:  "sync-repos",
-					Usage: "enable a repo sync prior to diffing",
+					Name:  "skip-deps",
+					Usage: "skip running `helm repo update` and `helm dependency build`",
 				},
 				cli.BoolFlag{
 					Name:  "detailed-exitcode",
@@ -192,8 +175,61 @@ func main() {
 				},
 			},
 			Action: func(c *cli.Context) error {
-				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface) []error {
-					return executeDiffCommand(c, state, helm, c.Bool("detailed-exitcode"), c.Bool("suppress-secrets"))
+				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface, ctx app.Context) []error {
+					if !c.Bool("skip-deps") {
+						if errs := ctx.SyncReposOnce(state, helm); errs != nil && len(errs) > 0 {
+							return errs
+						}
+						if errs := state.BuildDeps(helm); errs != nil && len(errs) > 0 {
+							return errs
+						}
+					}
+					if errs := state.PrepareRelease(helm, "diff"); errs != nil && len(errs) > 0 {
+						return errs
+					}
+
+					_, errs := executeDiffCommand(c, state, helm, c.Bool("detailed-exitcode"), c.Bool("suppress-secrets"))
+					return errs
+				})
+			},
+		},
+		{
+			Name:  "template",
+			Usage: "template releases from state file against env (helm template)",
+			Flags: []cli.Flag{
+				cli.StringFlag{
+					Name:  "args",
+					Value: "",
+					Usage: "pass args to helm template",
+				},
+				cli.StringSliceFlag{
+					Name:  "values",
+					Usage: "additional value files to be merged into the command",
+				},
+				cli.IntFlag{
+					Name:  "concurrency",
+					Value: 0,
+					Usage: "maximum number of concurrent downloads of release charts",
+				},
+				cli.BoolFlag{
+					Name:  "skip-deps",
+					Usage: "skip running `helm repo update` and `helm dependency build`",
+				},
+			},
+			Action: func(c *cli.Context) error {
+				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface, ctx app.Context) []error {
+					if !c.Bool("skip-deps") {
+						if errs := ctx.SyncReposOnce(state, helm); errs != nil && len(errs) > 0 {
+							return errs
+						}
+						if errs := state.BuildDeps(helm); errs != nil && len(errs) > 0 {
+							return errs
+						}
+					}
+					if errs := state.PrepareRelease(helm, "template"); errs != nil && len(errs) > 0 {
+						return errs
+					}
+					return executeTemplateCommand(c, state, helm)
 				})
 			},
 		},
@@ -213,23 +249,21 @@ func main() {
 				cli.IntFlag{
 					Name:  "concurrency",
 					Value: 0,
-					Usage: "maximum number of concurrent helm processes to run, 0 is unlimited",
+					Usage: "maximum number of concurrent downloads of release charts",
 				},
 			},
 			Action: func(c *cli.Context) error {
-				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface) []error {
-					args := args.GetArgs(c.String("args"), state)
-					if len(args) > 0 {
-						helm.SetExtraArgs(args...)
-					}
-					if c.GlobalString("helm-binary") != "" {
-						helm.SetHelmBinary(c.GlobalString("helm-binary"))
-					}
-
+				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface, ctx app.Context) []error {
 					values := c.StringSlice("values")
+					args := args.GetArgs(c.String("args"), state)
 					workers := c.Int("concurrency")
-
-					return state.LintReleases(helm, values, workers)
+					if errs := ctx.SyncReposOnce(state, helm); errs != nil && len(errs) > 0 {
+						return errs
+					}
+					if errs := state.PrepareRelease(helm, "lint"); errs != nil && len(errs) > 0 {
+						return errs
+					}
+					return state.LintReleases(helm, values, args, workers)
 				})
 			},
 		},
@@ -251,11 +285,29 @@ func main() {
 					Value: "",
 					Usage: "pass args to helm exec",
 				},
+				cli.BoolFlag{
+					Name:  "skip-deps",
+					Usage: "skip running `helm repo update` and `helm dependency build`",
+				},
 			},
 			Action: func(c *cli.Context) error {
-				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface) []error {
-					return executeSyncCommand(c, state, helm)
+				affectedReleases := state.AffectedReleases{}
+				errs := findAndIterateOverDesiredStatesUsingFlags(c, func(st *state.HelmState, helm helmexec.Interface, ctx app.Context) []error {
+					if !c.Bool("skip-deps") {
+						if errs := ctx.SyncReposOnce(st, helm); errs != nil && len(errs) > 0 {
+							return errs
+						}
+						if errs := st.BuildDeps(helm); errs != nil && len(errs) > 0 {
+							return errs
+						}
+					}
+					if errs := st.PrepareRelease(helm, "sync"); errs != nil && len(errs) > 0 {
+						return errs
+					}
+					return executeSyncCommand(c, &affectedReleases, st, helm)
 				})
+				affectedReleases.DisplayAffectedReleases(c.App.Metadata["logger"].(*zap.SugaredLogger))
+				return errs
 			},
 		},
 		{
@@ -276,47 +328,90 @@ func main() {
 					Value: "",
 					Usage: "pass args to helm exec",
 				},
-				cli.BoolFlag{
-					Name:  "auto-approve",
-					Usage: "Skip interactive approval before applying",
-				},
 				cli.BoolFlag{
 					Name:  "suppress-secrets",
 					Usage: "suppress secrets in the diff output. highly recommended to specify on CI/CD use-cases",
 				},
+				cli.BoolFlag{
+					Name:  "skip-deps",
+					Usage: "skip running `helm repo update` and `helm dependency build`",
+				},
 			},
 			Action: func(c *cli.Context) error {
-				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface) []error {
-					errs := executeDiffCommand(c, state, helm, true, c.Bool("suppress-secrets"))
+				affectedReleases := state.AffectedReleases{}
+				errs := findAndIterateOverDesiredStatesUsingFlags(c, func(st *state.HelmState, helm helmexec.Interface, ctx app.Context) []error {
+					if !c.Bool("skip-deps") {
+						if errs := ctx.SyncReposOnce(st, helm); errs != nil && len(errs) > 0 {
+							return errs
+						}
+						if errs := st.BuildDeps(helm); errs != nil && len(errs) > 0 {
+							return errs
+						}
+					}
+					if errs := st.PrepareRelease(helm, "apply"); errs != nil && len(errs) > 0 {
+						return errs
+					}
+
+					releases, errs := executeDiffCommand(c, st, helm, true, c.Bool("suppress-secrets"))
+
+					releasesToBeDeleted, err := st.DetectReleasesToBeDeleted(helm)
+					if err != nil {
+						errs = append(errs, err)
+					}
+
+					noError := true
+					for _, e := range errs {
+						switch err := e.(type) {
+						case *state.DiffError:
+							noError = noError && err.Code == 2
+						default:
+							noError = false
+						}
+					}
 
 					// sync only when there are changes
-					if len(errs) > 0 {
-						allErrsIndicateChanges := true
-						for _, err := range errs {
-							switch e := err.(type) {
-							case *exec.ExitError:
-								status := e.Sys().(syscall.WaitStatus)
-								// `helm diff --detailed-exitcode` returns 2 when there are changes
-								allErrsIndicateChanges = allErrsIndicateChanges && status.ExitStatus() == 2
-							default:
-								allErrsIndicateChanges = false
+					if noError {
+						if len(releases) == 0 && len(releasesToBeDeleted) == 0 {
+							// TODO better way to get the logger
+							logger := c.App.Metadata["logger"].(*zap.SugaredLogger)
+							logger.Infof("")
+							logger.Infof("No affected releases")
+						} else {
+							names := []string{}
+							for _, r := range releases {
+								names = append(names, fmt.Sprintf("  %s (%s) UPDATED", r.Name, r.Chart))
+							}
+							for _, r := range releasesToBeDeleted {
+								names = append(names, fmt.Sprintf("  %s (%s) DELETED", r.Name, r.Chart))
 							}
-						}
 
-						msg := `Do you really want to apply?
+							msg := fmt.Sprintf(`Affected releases are:
+%s
+
+Do you really want to apply?
   Helmfile will apply all your changes, as shown above.
 
-`
-						if allErrsIndicateChanges {
-							autoApprove := c.Bool("auto-approve")
-							if autoApprove || !autoApprove && askForConfirmation(msg) {
-								return executeSyncCommand(c, state, helm)
+`, strings.Join(names, "\n"))
+							interactive := c.GlobalBool("interactive")
+							if !interactive || interactive && askForConfirmation(msg) {
+								rs := []state.ReleaseSpec{}
+								for _, r := range releases {
+									rs = append(rs, *r)
+								}
+								for _, r := range releasesToBeDeleted {
+									rs = append(rs, *r)
+								}
+
+								st.Releases = rs
+								return executeSyncCommand(c, &affectedReleases, st, helm)
 							}
 						}
 					}
 
 					return errs
 				})
+				affectedReleases.DisplayAffectedReleases(c.App.Metadata["logger"].(*zap.SugaredLogger))
+				return errs
 			},
 		},
 		{
@@ -335,16 +430,13 @@ func main() {
 				},
 			},
 			Action: func(c *cli.Context) error {
-				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface) []error {
+				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface, _ app.Context) []error {
 					workers := c.Int("concurrency")
 
 					args := args.GetArgs(c.String("args"), state)
 					if len(args) > 0 {
 						helm.SetExtraArgs(args...)
 					}
-					if c.GlobalString("helm-binary") != "" {
-						helm.SetHelmBinary(c.GlobalString("helm-binary"))
-					}
 
 					return state.ReleaseStatuses(helm, workers)
 				})
@@ -352,7 +444,7 @@ func main() {
 		},
 		{
 			Name:  "delete",
-			Usage: "delete releases from state file (helm delete)",
+			Usage: "DEPRECATED: delete releases from state file (helm delete)",
 			Flags: []cli.Flag{
 				cli.StringFlag{
 					Name:  "args",
@@ -365,7 +457,8 @@ func main() {
 				},
 			},
 			Action: func(c *cli.Context) error {
-				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface) []error {
+				affectedReleases := state.AffectedReleases{}
+				errs := cmd.FindAndIterateOverDesiredStatesUsingFlagsWithReverse(c, true, func(state *state.HelmState, helm helmexec.Interface, _ app.Context) []error {
 					purge := c.Bool("purge")
 
 					args := args.GetArgs(c.String("args"), state)
@@ -373,12 +466,66 @@ func main() {
 						helm.SetExtraArgs(args...)
 					}
 
-					if c.GlobalString("helm-binary") != "" {
-						helm.SetHelmBinary(c.GlobalString("helm-binary"))
+					names := make([]string, len(state.Releases))
+					for i, r := range state.Releases {
+						names[i] = fmt.Sprintf("  %s (%s)", r.Name, r.Chart)
 					}
 
-					return state.DeleteReleases(helm, purge)
+					msg := fmt.Sprintf(`Affected releases are:
+%s
+
+Do you really want to delete?
+  Helmfile will delete all your releases, as shown above.
+
+`, strings.Join(names, "\n"))
+					interactive := c.GlobalBool("interactive")
+					if !interactive || interactive && askForConfirmation(msg) {
+						return state.DeleteReleases(&affectedReleases, helm, purge)
+					}
+					return nil
 				})
+				affectedReleases.DisplayAffectedReleases(c.App.Metadata["logger"].(*zap.SugaredLogger))
+				return errs
+			},
+		},
+		{
+			Name:  "destroy",
+			Usage: "deletes and then purges releases",
+			Flags: []cli.Flag{
+				cli.StringFlag{
+					Name:  "args",
+					Value: "",
+					Usage: "pass args to helm exec",
+				},
+			},
+			Action: func(c *cli.Context) error {
+				affectedReleases := state.AffectedReleases{}
+				errs := cmd.FindAndIterateOverDesiredStatesUsingFlagsWithReverse(c, true, func(state *state.HelmState, helm helmexec.Interface, _ app.Context) []error {
+					args := args.GetArgs(c.String("args"), state)
+					if len(args) > 0 {
+						helm.SetExtraArgs(args...)
+					}
+
+					names := make([]string, len(state.Releases))
+					for i, r := range state.Releases {
+						names[i] = fmt.Sprintf("  %s (%s)", r.Name, r.Chart)
+					}
+
+					msg := fmt.Sprintf(`Affected releases are:
+%s
+
+Do you really want to delete?
+  Helmfile will delete all your releases, as shown above.
+
+`, strings.Join(names, "\n"))
+					interactive := c.GlobalBool("interactive")
+					if !interactive || interactive && askForConfirmation(msg) {
+						return state.DeleteReleases(&affectedReleases, helm, true)
+					}
+					return nil
+				})
+				affectedReleases.DisplayAffectedReleases(c.App.Metadata["logger"].(*zap.SugaredLogger))
+				return errs
 			},
 		},
 		{
@@ -399,285 +546,69 @@ func main() {
 					Value: 300,
 					Usage: "maximum time for tests to run before being considered failed",
 				},
+				cli.IntFlag{
+					Name:  "concurrency",
+					Value: 0,
+					Usage: "maximum number of concurrent helm processes to run, 0 is unlimited",
+				},
 			},
 			Action: func(c *cli.Context) error {
-				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface) []error {
+				return findAndIterateOverDesiredStatesUsingFlags(c, func(state *state.HelmState, helm helmexec.Interface, _ app.Context) []error {
 					cleanup := c.Bool("cleanup")
 					timeout := c.Int("timeout")
+					concurrency := c.Int("concurrency")
 
 					args := args.GetArgs(c.String("args"), state)
 					if len(args) > 0 {
 						helm.SetExtraArgs(args...)
 					}
-					if c.GlobalString("helm-binary") != "" {
-						helm.SetHelmBinary(c.GlobalString("helm-binary"))
-					}
 
-					return state.TestReleases(helm, cleanup, timeout)
+					return state.TestReleases(helm, cleanup, timeout, concurrency)
 				})
 			},
 		},
 	}
 
-	err := app.Run(os.Args)
+	err := cliApp.Run(os.Args)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "%v\n", err)
 		os.Exit(3)
 	}
 }
 
-func executeSyncCommand(c *cli.Context, state *state.HelmState, helm helmexec.Interface) []error {
-	if errs := state.SyncRepos(helm); errs != nil && len(errs) > 0 {
-		return errs
-	}
-
-	if errs := state.UpdateDeps(helm); errs != nil && len(errs) > 0 {
-		return errs
-	}
-
+func executeSyncCommand(c *cli.Context, affectedReleases *state.AffectedReleases, state *state.HelmState, helm helmexec.Interface) []error {
 	args := args.GetArgs(c.String("args"), state)
 	if len(args) > 0 {
 		helm.SetExtraArgs(args...)
 	}
-	if c.GlobalString("helm-binary") != "" {
-		helm.SetHelmBinary(c.GlobalString("helm-binary"))
-	}
 
 	values := c.StringSlice("values")
 	workers := c.Int("concurrency")
 
-	return state.SyncReleases(helm, values, workers)
+	return state.SyncReleases(affectedReleases, helm, values, workers)
 }
 
-func executeDiffCommand(c *cli.Context, state *state.HelmState, helm helmexec.Interface, detailedExitCode, suppressSecrets bool) []error {
+func executeTemplateCommand(c *cli.Context, state *state.HelmState, helm helmexec.Interface) []error {
 	args := args.GetArgs(c.String("args"), state)
+	values := c.StringSlice("values")
+	workers := c.Int("concurrency")
+
+	return state.TemplateReleases(helm, values, args, workers)
+}
+
+func executeDiffCommand(c *cli.Context, st *state.HelmState, helm helmexec.Interface, detailedExitCode, suppressSecrets bool) ([]*state.ReleaseSpec, []error) {
+	args := args.GetArgs(c.String("args"), st)
 	if len(args) > 0 {
 		helm.SetExtraArgs(args...)
 	}
-	if c.GlobalString("helm-binary") != "" {
-		helm.SetHelmBinary(c.GlobalString("helm-binary"))
-	}
-
-	if c.Bool("sync-repos") {
-		if errs := state.SyncRepos(helm); errs != nil && len(errs) > 0 {
-			return errs
-		}
-	}
 
 	values := c.StringSlice("values")
 	workers := c.Int("concurrency")
+	triggerCleanupEvents := c.Command.HasName("diff")
 
-	return state.DiffReleases(helm, values, workers, detailedExitCode, suppressSecrets)
+	return st.DiffReleases(helm, values, workers, detailedExitCode, suppressSecrets, triggerCleanupEvents)
 }
 
-func findAndIterateOverDesiredStatesUsingFlags(c *cli.Context, converge func(*state.HelmState, helmexec.Interface) []error) error {
-	fileOrDir := c.GlobalString("file")
-	kubeContext := c.GlobalString("kube-context")
-	namespace := c.GlobalString("namespace")
-	selectors := c.GlobalStringSlice("selector")
-	logger := c.App.Metadata["logger"].(*zap.SugaredLogger)
-
-	env := c.GlobalString("environment")
-	if env == "" {
-		env = state.DefaultEnv
-	}
-
-	return findAndIterateOverDesiredStates(fileOrDir, converge, kubeContext, namespace, selectors, env, logger)
-}
-
-func findAndIterateOverDesiredStates(fileOrDir string, converge func(*state.HelmState, helmexec.Interface) []error, kubeContext, namespace string, selectors []string, env string, logger *zap.SugaredLogger) error {
-	desiredStateFiles, err := findDesiredStateFiles(fileOrDir)
-	if err != nil {
-		return err
-	}
-	allSelectorNotMatched := true
-	for _, f := range desiredStateFiles {
-		logger.Debugf("Processing %s", f)
-		yamlBuf, err := tmpl.NewFileRenderer(ioutil.ReadFile, "", environment.EmptyEnvironment).RenderTemplateFileToBuffer(f)
-		if err != nil {
-			return err
-		}
-		state, helm, noReleases, err := loadDesiredStateFromFile(
-			yamlBuf.Bytes(),
-			f,
-			kubeContext,
-			namespace,
-			selectors,
-			env,
-			logger,
-		)
-		if err != nil {
-			return err
-		}
-
-		if len(state.Helmfiles) > 0 {
-			for _, globPattern := range state.Helmfiles {
-				matches, err := filepath.Glob(globPattern)
-				if err != nil {
-					return fmt.Errorf("failed processing %s: %v", globPattern, err)
-				}
-				sort.Strings(matches)
-				for _, m := range matches {
-					if err := findAndIterateOverDesiredStates(m, converge, kubeContext, namespace, selectors, env, logger); err != nil {
-						return fmt.Errorf("failed processing %s: %v", globPattern, err)
-					}
-				}
-			}
-			return nil
-		}
-
-		allSelectorNotMatched = allSelectorNotMatched && noReleases
-		if noReleases {
-			continue
-		}
-		errs := converge(state, helm)
-		if err := clean(state, errs); err != nil {
-			return err
-		}
-	}
-	if allSelectorNotMatched {
-		logger.Error("specified selector did not match any releases in any helmfile")
-		os.Exit(2)
-	}
-	return nil
-}
-
-func findDesiredStateFiles(specifiedPath string) ([]string, error) {
-	var helmfileDir string
-	if specifiedPath != "" {
-		if fileExistsAt(specifiedPath) {
-			return []string{specifiedPath}, nil
-		} else if directoryExistsAt(specifiedPath) {
-			helmfileDir = specifiedPath
-		} else {
-			return []string{}, fmt.Errorf("specified state file %s is not found", specifiedPath)
-		}
-	} else {
-		var defaultFile string
-		if fileExistsAt(DefaultHelmfile) {
-			defaultFile = DefaultHelmfile
-		} else if fileExistsAt(DeprecatedHelmfile) {
-			log.Printf(
-				"warn: %s is being loaded: %s is deprecated in favor of %s. See https://github.com/roboll/helmfile/issues/25 for more information",
-				DeprecatedHelmfile,
-				DeprecatedHelmfile,
-				DefaultHelmfile,
-			)
-			defaultFile = DeprecatedHelmfile
-		}
-
-		if directoryExistsAt(DefaultHelmfileDirectory) {
-			if defaultFile != "" {
-				return []string{}, fmt.Errorf("configuration conlict error: you can have either %s or %s, but not both", defaultFile, DefaultHelmfileDirectory)
-			}
-
-			helmfileDir = DefaultHelmfileDirectory
-		} else if defaultFile != "" {
-			return []string{defaultFile}, nil
-		} else {
-			return []string{}, fmt.Errorf("no state file found. It must be named %s/*.yaml, %s, or %s, or otherwise specified with the --file flag", DefaultHelmfileDirectory, DefaultHelmfile, DeprecatedHelmfile)
-		}
-	}
-
-	files, err := filepath.Glob(filepath.Join(helmfileDir, "*.yaml"))
-	if err != nil {
-		return []string{}, err
-	}
-	sort.Slice(files, func(i, j int) bool {
-		return files[i] < files[j]
-	})
-	return files, nil
-}
-
-func fileExistsAt(path string) bool {
-	fileInfo, err := os.Stat(path)
-	return err == nil && fileInfo.Mode().IsRegular()
-}
-
-func directoryExistsAt(path string) bool {
-	fileInfo, err := os.Stat(path)
-	return err == nil && fileInfo.Mode().IsDir()
-}
-
-func loadDesiredStateFromFile(yaml []byte, file string, kubeContext, namespace string, labels []string, env string, logger *zap.SugaredLogger) (*state.HelmState, helmexec.Interface, bool, error) {
-	st, err := state.CreateFromYaml(yaml, file, env, logger)
-	if err != nil {
-		return nil, nil, false, fmt.Errorf("failed to read %s: %v", file, err)
-	}
-
-	if st.Context != "" {
-		if kubeContext != "" {
-			log.Printf("err: Cannot use option --kube-context and set attribute context.")
-			os.Exit(1)
-		}
-
-		kubeContext = st.Context
-	}
-	if namespace != "" {
-		if st.Namespace != "" {
-			log.Printf("err: Cannot use option --namespace and set attribute namespace.")
-			os.Exit(1)
-		}
-		st.Namespace = namespace
-	}
-
-	if len(labels) > 0 {
-		err = st.FilterReleases(labels)
-		if err != nil {
-			log.Print(err)
-			return nil, nil, true, nil
-		}
-	}
-
-	releaseNameCounts := map[string]int{}
-	for _, r := range st.Releases {
-		releaseNameCounts[r.Name] += 1
-	}
-	for name, c := range releaseNameCounts {
-		if c > 1 {
-			return nil, nil, false, fmt.Errorf("duplicate release \"%s\" found: there were %d releases named \"%s\" matching specified selector", name, c, name)
-		}
-	}
-
-	sigs := make(chan os.Signal, 1)
-	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
-	go func() {
-		sig := <-sigs
-
-		errs := []error{fmt.Errorf("Received [%s] to shutdown ", sig)}
-		clean(st, errs)
-	}()
-
-	return st, helmexec.New(logger, kubeContext), len(st.Releases) == 0, nil
-}
-
-func clean(st *state.HelmState, errs []error) error {
-	if errs == nil {
-		errs = []error{}
-	}
-
-	cleanErrs := st.Clean()
-	if cleanErrs != nil {
-		errs = append(errs, cleanErrs...)
-	}
-
-	if errs != nil && len(errs) > 0 {
-		for _, err := range errs {
-			switch e := err.(type) {
-			case *state.ReleaseError:
-				fmt.Printf("err: release \"%s\" in \"%s\" failed: %v\n", e.Name, st.FilePath, e)
-			default:
-				fmt.Printf("err: %v\n", e)
-			}
-		}
-		switch e := errs[0].(type) {
-		case *exec.ExitError:
-			// Propagate any non-zero exit status from the external command like `helm` that is failed under the hood
-			status := e.Sys().(syscall.WaitStatus)
-			os.Exit(status.ExitStatus())
-		default:
-			os.Exit(1)
-		}
-	}
-	return nil
+func findAndIterateOverDesiredStatesUsingFlags(c *cli.Context, converge func(*state.HelmState, helmexec.Interface, app.Context) []error) error {
+	return cmd.FindAndIterateOverDesiredStatesUsingFlagsWithReverse(c, false, converge)
 }

main_test.go

@@ -1,26 +0,0 @@
-package main
-
-import "testing"
-
-// See https://github.com/roboll/helmfile/issues/193
-func TestReadFromYaml_DuplicateReleaseName(t *testing.T) {
-	yamlFile := "example/path/to/yaml/file"
-	yamlContent := []byte(`releases:
-- name: myrelease1
-  chart: mychart1
-  labels:
-    stage: pre
-    foo: bar
-- name: myrelease1
-  chart: mychart2
-  labels:
-    stage: post
-`)
-	_, _, _, err := loadDesiredStateFromFile(yamlContent, yamlFile, "default", "default", []string{}, "default", logger)
-	if err == nil {
-		t.Error("error expected but not happened")
-	}
-	if err.Error() != "duplicate release \"myrelease1\" found: there were 2 releases named \"myrelease1\" matching specified selector" {
-		t.Errorf("unexpected error happened: %v", err)
-	}
-}

pkg/app/app.go

@@ -0,0 +1,407 @@
+package app
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/signal"
+
+	"github.com/roboll/helmfile/helmexec"
+	"github.com/roboll/helmfile/state"
+	"go.uber.org/zap"
+
+	"path/filepath"
+	"sort"
+	"syscall"
+)
+
+type App struct {
+	KubeContext string
+	Logger      *zap.SugaredLogger
+	Reverse     bool
+	Env         string
+	Namespace   string
+	Selectors   []string
+
+	readFile          func(string) ([]byte, error)
+	glob              func(string) ([]string, error)
+	abs               func(string) (string, error)
+	fileExistsAt      func(string) bool
+	directoryExistsAt func(string) bool
+
+	getwd func() (string, error)
+	chdir func(string) error
+}
+
+func Init(app *App) *App {
+	app.readFile = ioutil.ReadFile
+	app.glob = filepath.Glob
+	app.abs = filepath.Abs
+	app.getwd = os.Getwd
+	app.chdir = os.Chdir
+	app.fileExistsAt = fileExistsAt
+	app.directoryExistsAt = directoryExistsAt
+	return app
+}
+
+func (a *App) within(dir string, do func() error) error {
+	if dir == "." {
+		return do()
+	}
+
+	prev, err := a.getwd()
+	if err != nil {
+		return fmt.Errorf("failed getting current working direcotyr: %v", err)
+	}
+
+	absDir, err := a.abs(dir)
+	if err != nil {
+		return err
+	}
+
+	a.Logger.Debugf("changing working directory to \"%s\"", absDir)
+
+	if err := a.chdir(absDir); err != nil {
+		return fmt.Errorf("failed changing working directory to \"%s\": %v", absDir, err)
+	}
+
+	appErr := do()
+
+	a.Logger.Debugf("changing working directory back to \"%s\"", prev)
+
+	if chdirBackErr := a.chdir(prev); chdirBackErr != nil {
+		if appErr != nil {
+			a.Logger.Warnf("%v", appErr)
+		}
+		return fmt.Errorf("failed chaging working directory back to \"%s\": %v", prev, chdirBackErr)
+	}
+
+	return appErr
+}
+
+func (a *App) visitStateFiles(fileOrDir string, do func(string) error) error {
+	desiredStateFiles, err := a.findDesiredStateFiles(fileOrDir)
+	if err != nil {
+		return err
+	}
+
+	for _, relPath := range desiredStateFiles {
+		var file string
+		var dir string
+		if a.directoryExistsAt(relPath) {
+			file = relPath
+			dir = relPath
+		} else {
+			file = filepath.Base(relPath)
+			dir = filepath.Dir(relPath)
+		}
+
+		a.Logger.Debugf("processing file \"%s\" in directory \"%s\"", file, dir)
+
+		err := a.within(dir, func() error {
+			return do(file)
+		})
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (a *App) VisitDesiredStates(fileOrDir string, selector []string, converge func(*state.HelmState, helmexec.Interface) (bool, []error)) error {
+	noMatchInHelmfiles := true
+
+	err := a.visitStateFiles(fileOrDir, func(f string) error {
+		content, err := a.readFile(f)
+		if err != nil {
+			return err
+		}
+		// render template, in two runs
+		r := &twoPassRenderer{
+			reader:    a.readFile,
+			env:       a.Env,
+			namespace: a.Namespace,
+			filename:  f,
+			logger:    a.Logger,
+			abs:       a.abs,
+		}
+		yamlBuf, err := r.renderTemplate(content)
+		if err != nil {
+			return fmt.Errorf("error during %s parsing: %v", f, err)
+		}
+
+		st, err := a.loadDesiredStateFromYaml(
+			yamlBuf.Bytes(),
+			f,
+			a.Namespace,
+			a.Env,
+		)
+
+		helm := helmexec.New(a.Logger, a.KubeContext)
+
+		if err != nil {
+			switch stateLoadErr := err.(type) {
+			// Addresses https://github.com/roboll/helmfile/issues/279
+			case *state.StateLoadError:
+				switch stateLoadErr.Cause.(type) {
+				case *state.UndefinedEnvError:
+					return nil
+				default:
+					return err
+				}
+			default:
+				return err
+			}
+		}
+		st.Selectors = selector
+
+		if len(st.Helmfiles) > 0 {
+			noMatchInSubHelmfiles := true
+			for _, m := range st.Helmfiles {
+				//assign parent selector to sub helm selector in legacy mode or do not inherit in experimental mode
+				if (m.Selectors == nil && !isExplicitSelectorInheritanceEnabled()) || m.SelectorsInherited {
+					m.Selectors = selector
+				}
+				if err := a.VisitDesiredStates(m.Path, m.Selectors, converge); err != nil {
+					switch err.(type) {
+					case *NoMatchingHelmfileError:
+
+					default:
+						return fmt.Errorf("failed processing %s: %v", m.Path, err)
+					}
+				} else {
+					noMatchInSubHelmfiles = false
+				}
+			}
+			noMatchInHelmfiles = noMatchInHelmfiles && noMatchInSubHelmfiles
+		}
+
+		templated, tmplErr := st.ExecuteTemplates()
+		if tmplErr != nil {
+			return fmt.Errorf("failed executing release templates in \"%s\": %v", f, tmplErr)
+		}
+		processed, errs := converge(templated, helm)
+		noMatchInHelmfiles = noMatchInHelmfiles && !processed
+		return clean(templated, errs)
+	})
+
+	if err != nil {
+		return err
+	}
+
+	if noMatchInHelmfiles {
+		return &NoMatchingHelmfileError{selectors: a.Selectors, env: a.Env}
+	}
+
+	return nil
+}
+
+func (a *App) VisitDesiredStatesWithReleasesFiltered(fileOrDir string, converge func(*state.HelmState, helmexec.Interface) []error) error {
+
+	err := a.VisitDesiredStates(fileOrDir, a.Selectors, func(st *state.HelmState, helm helmexec.Interface) (bool, []error) {
+		if len(st.Selectors) > 0 {
+			err := st.FilterReleases()
+			if err != nil {
+				return false, []error{err}
+			}
+		}
+
+		type Key struct {
+			TillerNamespace, Name string
+		}
+		releaseNameCounts := map[Key]int{}
+		for _, r := range st.Releases {
+			tillerNamespace := st.HelmDefaults.TillerNamespace
+			if r.TillerNamespace != "" {
+				tillerNamespace = r.TillerNamespace
+			}
+			releaseNameCounts[Key{tillerNamespace, r.Name}]++
+		}
+		for name, c := range releaseNameCounts {
+			if c > 1 {
+				return false, []error{fmt.Errorf("duplicate release \"%s\" found in \"%s\": there were %d releases named \"%s\" matching specified selector", name.Name, name.TillerNamespace, c, name.Name)}
+			}
+		}
+
+		errs := converge(st, helm)
+
+		processed := len(st.Releases) != 0 && len(errs) == 0
+
+		return processed, errs
+	})
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (a *App) findStateFilesInAbsPaths(specifiedPath string) ([]string, error) {
+	rels, err := a.findDesiredStateFiles(specifiedPath)
+	if err != nil {
+		return rels, err
+	}
+
+	files := make([]string, len(rels))
+	for i := range rels {
+		files[i], err = filepath.Abs(rels[i])
+		if err != nil {
+			return []string{}, err
+		}
+	}
+	return files, nil
+}
+
+func (a *App) findDesiredStateFiles(specifiedPath string) ([]string, error) {
+	var helmfileDir string
+	if specifiedPath != "" {
+		if a.fileExistsAt(specifiedPath) {
+			return []string{specifiedPath}, nil
+		} else if a.directoryExistsAt(specifiedPath) {
+			helmfileDir = specifiedPath
+		} else {
+			return []string{}, fmt.Errorf("specified state file %s is not found", specifiedPath)
+		}
+	} else {
+		var defaultFile string
+		if a.fileExistsAt(DefaultHelmfile) {
+			defaultFile = DefaultHelmfile
+		} else if a.fileExistsAt(DeprecatedHelmfile) {
+			log.Printf(
+				"warn: %s is being loaded: %s is deprecated in favor of %s. See https://github.com/roboll/helmfile/issues/25 for more information",
+				DeprecatedHelmfile,
+				DeprecatedHelmfile,
+				DefaultHelmfile,
+			)
+			defaultFile = DeprecatedHelmfile
+		}
+
+		if a.directoryExistsAt(DefaultHelmfileDirectory) {
+			if defaultFile != "" {
+				return []string{}, fmt.Errorf("configuration conlict error: you can have either %s or %s, but not both", defaultFile, DefaultHelmfileDirectory)
+			}
+
+			helmfileDir = DefaultHelmfileDirectory
+		} else if defaultFile != "" {
+			return []string{defaultFile}, nil
+		} else {
+			return []string{}, fmt.Errorf("no state file found. It must be named %s/*.{yaml,yml}, %s, or %s, or otherwise specified with the --file flag", DefaultHelmfileDirectory, DefaultHelmfile, DeprecatedHelmfile)
+		}
+	}
+
+	files, err := a.glob(filepath.Join(helmfileDir, "*.y*ml"))
+	if err != nil {
+		return []string{}, err
+	}
+	sort.Slice(files, func(i, j int) bool {
+		return files[i] < files[j]
+	})
+	return files, nil
+}
+
+func fileExistsAt(path string) bool {
+	fileInfo, err := os.Stat(path)
+	return err == nil && fileInfo.Mode().IsRegular()
+}
+
+func directoryExistsAt(path string) bool {
+	fileInfo, err := os.Stat(path)
+	return err == nil && fileInfo.Mode().IsDir()
+}
+
+func (a *App) loadDesiredStateFromYaml(yaml []byte, file string, namespace string, env string) (*state.HelmState, error) {
+	c := state.NewCreator(a.Logger, a.readFile, a.abs)
+	st, err := c.CreateFromYaml(yaml, file, env)
+	if err != nil {
+		return nil, err
+	}
+
+	helmfiles := []state.SubHelmfileSpec{}
+	for _, hf := range st.Helmfiles {
+		globPattern := hf.Path
+		var absPathPattern string
+		if filepath.IsAbs(globPattern) {
+			absPathPattern = globPattern
+		} else {
+			absPathPattern = st.JoinBase(globPattern)
+		}
+		matches, err := a.glob(absPathPattern)
+		if err != nil {
+			return nil, fmt.Errorf("failed processing %s: %v", globPattern, err)
+		}
+		sort.Strings(matches)
+		for _, match := range matches {
+			newHelmfile := hf
+			newHelmfile.Path = match
+			helmfiles = append(helmfiles, newHelmfile)
+		}
+
+	}
+	st.Helmfiles = helmfiles
+
+	if a.Reverse {
+		rev := func(i, j int) bool {
+			return j < i
+		}
+		sort.Slice(st.Releases, rev)
+		sort.Slice(st.Helmfiles, rev)
+	}
+
+	if a.KubeContext != "" {
+		if st.HelmDefaults.KubeContext != "" {
+			log.Printf("err: Cannot use option --kube-context and set attribute helmDefaults.kubeContext.")
+			os.Exit(1)
+		}
+		st.HelmDefaults.KubeContext = a.KubeContext
+	}
+	if namespace != "" {
+		if st.Namespace != "" {
+			log.Printf("err: Cannot use option --namespace and set attribute namespace.")
+			os.Exit(1)
+		}
+		st.Namespace = namespace
+	}
+
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		sig := <-sigs
+
+		errs := []error{fmt.Errorf("Received [%s] to shutdown ", sig)}
+		_ = clean(st, errs)
+		// See http://tldp.org/LDP/abs/html/exitcodes.html
+		switch sig {
+		case syscall.SIGINT:
+			os.Exit(130)
+		case syscall.SIGTERM:
+			os.Exit(143)
+		}
+	}()
+
+	return st, nil
+}
+
+func clean(st *state.HelmState, errs []error) error {
+	if errs == nil {
+		errs = []error{}
+	}
+
+	cleanErrs := st.Clean()
+	if cleanErrs != nil {
+		errs = append(errs, cleanErrs...)
+	}
+
+	if errs != nil && len(errs) > 0 {
+		for _, err := range errs {
+			switch e := err.(type) {
+			case *state.ReleaseError:
+				fmt.Printf("err: release \"%s\" in \"%s\" failed: %v\n", e.Name, st.FilePath, e)
+			default:
+				fmt.Printf("err: %v\n", e)
+			}
+		}
+		return errs[0]
+	}
+	return nil
+}

pkg/app/app_test.go

@@ -0,0 +1,654 @@
+package app
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"reflect"
+	"strings"
+	"testing"
+
+	"github.com/roboll/helmfile/helmexec"
+	"github.com/roboll/helmfile/state"
+	"gotest.tools/env"
+)
+
+type testFs struct {
+	wd    string
+	dirs  map[string]bool
+	files map[string]string
+}
+
+func appWithFs(app *App, files map[string]string) *App {
+	fs := newTestFs(files)
+	return injectFs(app, fs)
+}
+
+func injectFs(app *App, fs *testFs) *App {
+	app.readFile = fs.readFile
+	app.glob = fs.glob
+	app.abs = fs.abs
+	app.getwd = fs.getwd
+	app.chdir = fs.chdir
+	app.fileExistsAt = fs.fileExistsAt
+	app.directoryExistsAt = fs.directoryExistsAt
+	return app
+}
+
+func newTestFs(files map[string]string) *testFs {
+	dirs := map[string]bool{}
+	for abs, _ := range files {
+		d := filepath.Dir(abs)
+		dirs[d] = true
+	}
+	return &testFs{
+		wd:    "/path/to",
+		dirs:  dirs,
+		files: files,
+	}
+}
+
+func (f *testFs) fileExistsAt(path string) bool {
+	var ok bool
+	if strings.Contains(path, "/") {
+		_, ok = f.files[path]
+	} else {
+		_, ok = f.files[filepath.Join(f.wd, path)]
+	}
+	return ok
+}
+
+func (f *testFs) directoryExistsAt(path string) bool {
+	var ok bool
+	if strings.Contains(path, "/") {
+		_, ok = f.dirs[path]
+	} else {
+		_, ok = f.dirs[filepath.Join(f.wd, path)]
+	}
+	return ok
+}
+
+func (f *testFs) readFile(filename string) ([]byte, error) {
+	var str string
+	var ok bool
+	if strings.Contains(filename, "/") {
+		str, ok = f.files[filename]
+	} else {
+		str, ok = f.files[filepath.Join(f.wd, filename)]
+	}
+	if !ok {
+		return []byte(nil), fmt.Errorf("no file found: %s", filename)
+	}
+	return []byte(str), nil
+}
+
+func (f *testFs) glob(pattern string) ([]string, error) {
+	matches := []string{}
+	for name, _ := range f.files {
+		matched, err := filepath.Match(pattern, name)
+		if err != nil {
+			return nil, err
+		}
+		if matched {
+			matches = append(matches, name)
+		}
+	}
+	if len(matches) == 0 {
+		return []string(nil), fmt.Errorf("no file matched: %s", pattern)
+	}
+	return matches, nil
+}
+
+func (f *testFs) abs(path string) (string, error) {
+	var p string
+	if path[0] == '/' {
+		p = path
+	} else {
+		p = filepath.Join(f.wd, path)
+	}
+	return filepath.Clean(p), nil
+}
+
+func (f *testFs) getwd() (string, error) {
+	return f.wd, nil
+}
+
+func (f *testFs) chdir(dir string) error {
+	if dir == "/path/to" || dir == "/path/to/helmfile.d" {
+		f.wd = dir
+		return nil
+	}
+	return fmt.Errorf("unexpected chdir \"%s\"", dir)
+}
+
+// See https://github.com/roboll/helmfile/issues/193
+func TestVisitDesiredStatesWithReleasesFiltered(t *testing.T) {
+	files := map[string]string{
+		"/path/to/helmfile.yaml": `
+helmfiles:
+- helmfile.d/a*.yaml
+- helmfile.d/b*.yaml
+`,
+		"/path/to/helmfile.d/a1.yaml": `
+releases:
+- name: zipkin
+  chart: stable/zipkin
+`,
+		"/path/to/helmfile.d/a2.yaml": `
+releases:
+- name: prometheus
+  chart: stable/prometheus
+`,
+		"/path/to/helmfile.d/b.yaml": `
+releases:
+- name: grafana
+  chart: stable/grafana
+`,
+	}
+	noop := func(st *state.HelmState, helm helmexec.Interface) []error {
+		return []error{}
+	}
+
+	testcases := []struct {
+		name      string
+		expectErr bool
+	}{
+		{name: "prometheus", expectErr: false},
+		{name: "zipkin", expectErr: false},
+		{name: "grafana", expectErr: false},
+		{name: "elasticsearch", expectErr: true},
+	}
+
+	for _, testcase := range testcases {
+		app := appWithFs(&App{
+			KubeContext: "default",
+			Logger:      helmexec.NewLogger(os.Stderr, "debug"),
+			Selectors:   []string{fmt.Sprintf("name=%s", testcase.name)},
+			Namespace:   "",
+			Env:         "default",
+		}, files)
+		err := app.VisitDesiredStatesWithReleasesFiltered(
+			"helmfile.yaml", noop,
+		)
+		if testcase.expectErr && err == nil {
+			t.Errorf("error expected but not happened for name=%s", testcase.name)
+		} else if !testcase.expectErr && err != nil {
+			t.Errorf("unexpected error for name=%s: %v", testcase.name, err)
+		}
+	}
+}
+
+// See https://github.com/roboll/helmfile/issues/320
+func TestVisitDesiredStatesWithReleasesFiltered_UndefinedEnv(t *testing.T) {
+	files := map[string]string{
+		"/path/to/helmfile.yaml": `
+environments:
+  prod:
+
+helmfiles:
+- helmfile.d/a*.yaml
+`,
+		"/path/to/helmfile.d/a1.yaml": `
+environments:
+  prod:
+
+releases:
+- name: zipkin
+  chart: stable/zipkin
+`,
+	}
+	noop := func(st *state.HelmState, helm helmexec.Interface) []error {
+		return []error{}
+	}
+
+	testcases := []struct {
+		name      string
+		expectErr bool
+	}{
+		{name: "undefined_env", expectErr: true},
+		{name: "default", expectErr: false},
+		{name: "prod", expectErr: false},
+	}
+
+	for _, testcase := range testcases {
+		app := appWithFs(&App{
+			KubeContext: "default",
+			Logger:      helmexec.NewLogger(os.Stderr, "debug"),
+			Namespace:   "",
+			Selectors:   []string{},
+			Env:         testcase.name,
+		}, files)
+		err := app.VisitDesiredStatesWithReleasesFiltered(
+			"helmfile.yaml", noop,
+		)
+		if testcase.expectErr && err == nil {
+			t.Errorf("error expected but not happened for environment=%s", testcase.name)
+		} else if !testcase.expectErr && err != nil {
+			t.Errorf("unexpected error for environment=%s: %v", testcase.name, err)
+		}
+	}
+}
+
+// See https://github.com/roboll/helmfile/issues/322
+func TestVisitDesiredStatesWithReleasesFiltered_Selectors(t *testing.T) {
+	files := map[string]string{
+		"/path/to/helmfile.yaml": `
+helmfiles:
+- helmfile.d/a*.yaml
+- helmfile.d/b*.yaml
+`,
+		"/path/to/helmfile.d/a1.yaml": `
+releases:
+- name: zipkin
+  chart: stable/zipkin
+`,
+		"/path/to/helmfile.d/a2.yaml": `
+releases:
+- name: prometheus
+  chart: stable/prometheus
+`,
+		"/path/to/helmfile.d/b.yaml": `
+helmDefaults:
+  tillerNamespace: zoo
+releases:
+- name: grafana
+  chart: stable/grafana
+- name: foo
+  chart: charts/foo
+  labels:
+    duplicated: yes
+- name: foo
+  chart: charts/foo
+  labels:
+    duplicated: yes
+- name: bar
+  chart: charts/foo
+  tillerNamespace:  bar1
+  labels:
+    duplicatedOK: yes
+- name: bar
+  chart: charts/foo
+  tillerNamespace: bar2
+  labels:
+    duplicatedOK: yes
+`,
+	}
+
+	testcases := []struct {
+		label         string
+		expectedCount int
+		expectErr     bool
+		errMsg        string
+	}{
+		{label: "name=prometheus", expectedCount: 1, expectErr: false},
+		{label: "name=", expectedCount: 0, expectErr: true, errMsg: "failed processing /path/to/helmfile.d/a1.yaml: Malformed label: name=. Expected label in form k=v or k!=v"},
+		{label: "name!=", expectedCount: 0, expectErr: true, errMsg: "failed processing /path/to/helmfile.d/a1.yaml: Malformed label: name!=. Expected label in form k=v or k!=v"},
+		{label: "name", expectedCount: 0, expectErr: true, errMsg: "failed processing /path/to/helmfile.d/a1.yaml: Malformed label: name. Expected label in form k=v or k!=v"},
+		// See https://github.com/roboll/helmfile/issues/193
+		{label: "duplicated=yes", expectedCount: 0, expectErr: true, errMsg: "failed processing /path/to/helmfile.d/b.yaml: duplicate release \"foo\" found in \"zoo\": there were 2 releases named \"foo\" matching specified selector"},
+		{label: "duplicatedOK=yes", expectedCount: 2, expectErr: false},
+	}
+
+	for _, testcase := range testcases {
+		actual := []string{}
+
+		collectReleases := func(st *state.HelmState, helm helmexec.Interface) []error {
+			for _, r := range st.Releases {
+				actual = append(actual, r.Name)
+			}
+			return []error{}
+		}
+
+		app := appWithFs(&App{
+			KubeContext: "default",
+			Logger:      helmexec.NewLogger(os.Stderr, "debug"),
+			Namespace:   "",
+			Selectors:   []string{testcase.label},
+			Env:         "default",
+		}, files)
+
+		err := app.VisitDesiredStatesWithReleasesFiltered(
+			"helmfile.yaml", collectReleases,
+		)
+		if testcase.expectErr {
+			if err == nil {
+				t.Errorf("error expected but not happened for selector %s", testcase.label)
+			} else if err.Error() != testcase.errMsg {
+				t.Errorf("unexpected error message: expected=\"%s\", actual=\"%s\"", testcase.errMsg, err.Error())
+			}
+		} else if !testcase.expectErr && err != nil {
+			t.Errorf("unexpected error for selector %s: %v", testcase.label, err)
+		}
+		if len(actual) != testcase.expectedCount {
+			t.Errorf("unexpected release count for selector %s: expected=%d, actual=%d", testcase.label, testcase.expectedCount, len(actual))
+		}
+	}
+}
+
+func TestVisitDesiredStatesWithReleasesFiltered_EmbeddedSelectors(t *testing.T) {
+	files := map[string]string{
+		"/path/to/helmfile.yaml": `
+helmfiles:
+- path: helmfile.d/a*.yaml
+  selectors:
+  - name=prometheus      
+  - name=zipkin      
+- helmfile.d/b*.yaml
+- path: helmfile.d/c*.yaml
+  selectors: []
+`,
+		"/path/to/helmfile.d/a1.yaml": `
+releases:
+- name: zipkin
+  chart: stable/zipkin
+`,
+		"/path/to/helmfile.d/a2.yaml": `
+releases:
+- name: prometheus
+  chart: stable/prometheus
+`,
+		"/path/to/helmfile.d/a3.yaml": `
+releases:
+- name: mongodb
+  chart: stable/mongodb
+`,
+		"/path/to/helmfile.d/b.yaml": `
+releases:
+- name: grafana
+  chart: stable/grafana
+- name: bar
+  chart: charts/foo
+  tillerNamespace:  bar1
+  labels:
+    duplicatedOK: yes
+- name: bar
+  chart: charts/foo
+  tillerNamespace: bar2
+  labels:
+    duplicatedOK: yes
+`,
+		"/path/to/helmfile.d/c.yaml": `
+releases:
+- name: grafana
+  chart: stable/grafana
+- name: postgresql
+  chart: charts/postgresql
+  labels:
+    whatever: yes
+`,
+	}
+	//Check with legacy behavior, that is when no explicit selector then sub-helmfiles inherits from command line selector
+	legacyTestcases := []struct {
+		label            string
+		expectedReleases []string
+		expectErr        bool
+		errMsg           string
+	}{
+		{label: "duplicatedOK=yes", expectedReleases: []string{"zipkin", "prometheus", "bar", "bar", "grafana", "postgresql"}, expectErr: false},
+		{label: "name=zipkin", expectedReleases: []string{"zipkin", "prometheus", "grafana", "postgresql"}, expectErr: false},
+		{label: "name=grafana", expectedReleases: []string{"zipkin", "prometheus", "grafana", "grafana", "postgresql"}, expectErr: false},
+		{label: "name=doesnotexists", expectedReleases: []string{"zipkin", "prometheus", "grafana", "postgresql"}, expectErr: false},
+	}
+	runFilterSubHelmFilesTests(legacyTestcases, files, t, "1st EmbeddedSelectors")
+
+	//Check with experimental behavior, that is when no explicit selector then sub-helmfiles do no inherit from any selector
+	desiredTestcases := []struct {
+		label            string
+		expectedReleases []string
+		expectErr        bool
+		errMsg           string
+	}{
+		{label: "duplicatedOK=yes", expectedReleases: []string{"zipkin", "prometheus", "grafana", "bar", "bar", "grafana", "postgresql"}, expectErr: false},
+		{label: "name=doesnotexists", expectedReleases: []string{"zipkin", "prometheus", "grafana", "bar", "bar", "grafana", "postgresql"}, expectErr: false},
+	}
+
+	defer env.Patch(t, ExperimentalEnvVar, ExperimentalSelectorExplicit)()
+
+	runFilterSubHelmFilesTests(desiredTestcases, files, t, "2nd EmbeddedSelectors")
+
+}
+
+func TestVisitDesiredStatesWithReleasesFiltered_InheritedSelectors_3leveldeep(t *testing.T) {
+	files := map[string]string{
+		"/path/to/helmfile.yaml": `
+helmfiles:
+- helmfile.d/a*.yaml
+releases:
+- name: mongodb
+  chart: stable/mongodb
+`,
+		"/path/to/helmfile.d/a.yaml": `
+helmfiles:
+- b*.yaml
+releases:
+- name: zipkin
+  chart: stable/zipkin
+`,
+		"/path/to/helmfile.d/b.yaml": `
+releases:
+- name: grafana
+  chart: stable/grafana
+`,
+	}
+	//Check with legacy behavior, that is when no explicit selector then sub-helmfiles inherits from command line selector
+	legacyTestcases := []struct {
+		label            string
+		expectedReleases []string
+		expectErr        bool
+		errMsg           string
+	}{
+		{label: "name!=grafana", expectedReleases: []string{"zipkin", "mongodb"}, expectErr: false},
+	}
+	runFilterSubHelmFilesTests(legacyTestcases, files, t, "1st 3leveldeep")
+
+	//Check with experimental behavior, that is when no explicit selector then sub-helmfiles do no inherit from any selector
+	desiredTestcases := []struct {
+		label            string
+		expectedReleases []string
+		expectErr        bool
+		errMsg           string
+	}{
+		{label: "name!=grafana", expectedReleases: []string{"grafana", "zipkin", "mongodb"}, expectErr: false},
+	}
+
+	defer env.Patch(t, ExperimentalEnvVar, ExperimentalSelectorExplicit)()
+
+	runFilterSubHelmFilesTests(desiredTestcases, files, t, "2nd 3leveldeep")
+
+}
+
+func TestVisitDesiredStatesWithReleasesFiltered_InheritedSelectors_inherits(t *testing.T) {
+	files := map[string]string{
+		"/path/to/helmfile.yaml": `
+helmfiles:
+- helmfile.d/a*.yaml
+- path: helmfile.d/a*.yaml
+  selectors:
+  - select=foo
+releases:
+- name: mongodb
+  chart: stable/mongodb
+`,
+		"/path/to/helmfile.d/a.yaml": `
+helmfiles:
+- path: b*.yaml
+  selectorsInherited: true
+releases:
+- name: zipkin
+  chart: stable/zipkin
+  labels:
+    select: foo
+`,
+		"/path/to/helmfile.d/b.yaml": `
+releases:
+- name: grafana
+  chart: stable/grafana
+- name: prometheus
+  chart: stable/prometheus
+  labels:
+    select: foo
+`,
+	}
+	//Check with legacy behavior, that is when no explicit selector then sub-helmfiles inherits from command line selector
+	legacyTestcases := []struct {
+		label            string
+		expectedReleases []string
+		expectErr        bool
+		errMsg           string
+	}{
+		{label: "name=grafana", expectedReleases: []string{"grafana", "prometheus", "zipkin"}, expectErr: false},
+		{label: "select!=foo", expectedReleases: []string{"grafana", "prometheus", "zipkin", "mongodb"}, expectErr: false},
+	}
+	runFilterSubHelmFilesTests(legacyTestcases, files, t, "1st inherits")
+
+	//Check with experimental behavior, that is when no explicit selector then sub-helmfiles do no inherit from any selector
+	desiredTestcases := []struct {
+		label            string
+		expectedReleases []string
+		expectErr        bool
+		errMsg           string
+	}{
+		{label: "name=grafana", expectedReleases: []string{"grafana", "prometheus", "zipkin", "prometheus", "zipkin"}, expectErr: false},
+		{label: "select!=foo", expectedReleases: []string{"grafana", "prometheus", "zipkin", "prometheus", "zipkin", "mongodb"}, expectErr: false},
+	}
+
+	defer env.Patch(t, ExperimentalEnvVar, ExperimentalSelectorExplicit)()
+
+	runFilterSubHelmFilesTests(desiredTestcases, files, t, "2nd inherits")
+
+}
+
+func runFilterSubHelmFilesTests(testcases []struct {
+	label            string
+	expectedReleases []string
+	expectErr        bool
+	errMsg           string
+}, files map[string]string, t *testing.T, testName string) {
+	for _, testcase := range testcases {
+		actual := []string{}
+
+		collectReleases := func(st *state.HelmState, helm helmexec.Interface) []error {
+			for _, r := range st.Releases {
+				actual = append(actual, r.Name)
+			}
+			return []error{}
+		}
+
+		app := appWithFs(&App{
+			KubeContext: "default",
+			Logger:      helmexec.NewLogger(os.Stderr, "debug"),
+			Namespace:   "",
+			Selectors:   []string{testcase.label},
+			Env:         "default",
+		}, files)
+
+		err := app.VisitDesiredStatesWithReleasesFiltered(
+			"helmfile.yaml", collectReleases,
+		)
+		if testcase.expectErr {
+			if err == nil {
+				t.Errorf("[%s]error expected but not happened for selector %s", testName, testcase.label)
+			} else if err.Error() != testcase.errMsg {
+				t.Errorf("[%s]unexpected error message: expected=\"%s\", actual=\"%s\"", testName, testcase.errMsg, err.Error())
+			}
+		} else if !testcase.expectErr && err != nil {
+			t.Errorf("[%s]unexpected error for selector %s: %v", testName, testcase.label, err)
+		}
+		if !reflect.DeepEqual(actual, testcase.expectedReleases) {
+			t.Errorf("[%s]unexpected releases for selector %s: expected=%v, actual=%v", testName, testcase.label, testcase.expectedReleases, actual)
+		}
+	}
+
+}
+
+// See https://github.com/roboll/helmfile/issues/312
+func TestVisitDesiredStatesWithReleasesFiltered_ReverseOrder(t *testing.T) {
+	files := map[string]string{
+		"/path/to/helmfile.yaml": `
+helmfiles:
+- helmfile.d/a*.yaml
+- helmfile.d/b*.yaml
+`,
+		"/path/to/helmfile.d/a1.yaml": `
+releases:
+- name: zipkin
+  chart: stable/zipkin
+`,
+		"/path/to/helmfile.d/a2.yaml": `
+releases:
+- name: prometheus
+  chart: stable/prometheus
+- name: elasticsearch
+  chart: stable/elasticsearch
+`,
+		"/path/to/helmfile.d/b.yaml": `
+releases:
+- name: grafana
+  chart: stable/grafana
+`,
+	}
+
+	expected := []string{"grafana", "elasticsearch", "prometheus", "zipkin"}
+
+	testcases := []struct {
+		reverse  bool
+		expected []string
+	}{
+		{reverse: false, expected: []string{"zipkin", "prometheus", "elasticsearch", "grafana"}},
+		{reverse: true, expected: []string{"grafana", "elasticsearch", "prometheus", "zipkin"}},
+	}
+	for _, testcase := range testcases {
+		actual := []string{}
+
+		collectReleases := func(st *state.HelmState, helm helmexec.Interface) []error {
+			for _, r := range st.Releases {
+				actual = append(actual, r.Name)
+			}
+			return []error{}
+		}
+		app := appWithFs(&App{
+			KubeContext: "default",
+			Logger:      helmexec.NewLogger(os.Stderr, "debug"),
+			Reverse:     testcase.reverse,
+			Namespace:   "",
+			Selectors:   []string{},
+			Env:         "default",
+		}, files)
+		err := app.VisitDesiredStatesWithReleasesFiltered(
+			"helmfile.yaml", collectReleases,
+		)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if !reflect.DeepEqual(testcase.expected, actual) {
+			t.Errorf("releases did not match: expected=%v actual=%v", expected, actual)
+		}
+	}
+}
+
+func TestLoadDesiredStateFromYaml_DuplicateReleaseName(t *testing.T) {
+	yamlFile := "example/path/to/yaml/file"
+	yamlContent := []byte(`releases:
+- name: myrelease1
+  chart: mychart1
+  labels:
+    stage: pre
+    foo: bar
+- name: myrelease1
+  chart: mychart2
+  labels:
+    stage: post
+`)
+	app := &App{
+		readFile:    ioutil.ReadFile,
+		glob:        filepath.Glob,
+		abs:         filepath.Abs,
+		KubeContext: "default",
+		Logger:      helmexec.NewLogger(os.Stderr, "debug"),
+	}
+	_, err := app.loadDesiredStateFromYaml(yamlContent, yamlFile, "default", "default")
+	if err != nil {
+		t.Error("unexpected error")
+	}
+}

pkg/app/constants.go

@@ -0,0 +1,18 @@
+package app
+
+import (
+	"os"
+	"strings"
+)
+
+const (
+	DefaultHelmfile              = "helmfile.yaml"
+	DeprecatedHelmfile           = "charts.yaml"
+	DefaultHelmfileDirectory     = "helmfile.d"
+	ExperimentalEnvVar           = "HELMFILE_EXPERIMENTAL"         // environment variable for experimental features, expecting "true" lower case
+	ExperimentalSelectorExplicit = "explicit-selector-inheritance" // value to remove default selector inheritance to sub-helmfiles and use the explicit one
+)
+
+func isExplicitSelectorInheritanceEnabled() bool {
+	return os.Getenv(ExperimentalEnvVar) == "true" || strings.Contains(os.Getenv(ExperimentalEnvVar), ExperimentalSelectorExplicit)
+}

pkg/app/constants_test.go

@@ -0,0 +1,27 @@
+package app
+
+import (
+	. "gotest.tools/assert"
+	is "gotest.tools/assert/cmp"
+	"gotest.tools/env"
+	"os"
+	"testing"
+)
+
+func TestIsExplicitSelectorInheritanceEnabled(t *testing.T) {
+	//env var ExperimentalEnvVar is set
+	Assert(t, is.Equal(os.Getenv(ExperimentalEnvVar), ""))
+	Check(t, !isExplicitSelectorInheritanceEnabled())
+
+	//check for env var ExperimentalEnvVar set to true
+	defer env.Patch(t, ExperimentalEnvVar, "true")()
+	Check(t, isExplicitSelectorInheritanceEnabled())
+
+	//check for env var ExperimentalEnvVar set to anything
+	defer env.Patch(t, ExperimentalEnvVar, "foo")()
+	Check(t, !isExplicitSelectorInheritanceEnabled())
+
+	//check for env var ExperimentalEnvVar set to ExperimentalSelectorExplicit
+	defer env.Patch(t, ExperimentalEnvVar, ExperimentalSelectorExplicit)()
+	Check(t, isExplicitSelectorInheritanceEnabled())
+}

pkg/app/context.go

@@ -0,0 +1,33 @@
+package app
+
+import "github.com/roboll/helmfile/state"
+
+type Context struct {
+	updatedRepos map[string]struct{}
+}
+
+func NewContext() Context {
+	return Context{
+		updatedRepos: map[string]struct{}{},
+	}
+}
+
+func (ctx Context) SyncReposOnce(st *state.HelmState, helm state.RepoUpdater) []error {
+	var errs []error
+
+	allUpdated := true
+	for _, r := range st.Repositories {
+		_, exists := ctx.updatedRepos[r.Name]
+		allUpdated = allUpdated && exists
+	}
+
+	if !allUpdated {
+		errs = st.SyncRepos(helm)
+
+		for _, r := range st.Repositories {
+			ctx.updatedRepos[r.Name] = struct{}{}
+		}
+	}
+
+	return errs
+}

pkg/app/errors.go

@@ -0,0 +1,19 @@
+package app
+
+import (
+	"fmt"
+	"strings"
+)
+
+type NoMatchingHelmfileError struct {
+	selectors []string
+	env       string
+}
+
+func (e *NoMatchingHelmfileError) Error() string {
+	return fmt.Sprintf(
+		"err: no releases found that matches specified selector(%s) and environment(%s), in any helmfile",
+		strings.Join(e.selectors, ", "),
+		e.env,
+	)
+}

pkg/app/two_pass_renderer.go

@@ -0,0 +1,80 @@
+package app
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/roboll/helmfile/environment"
+	"github.com/roboll/helmfile/state"
+	"github.com/roboll/helmfile/tmpl"
+	"go.uber.org/zap"
+	"path/filepath"
+	"strings"
+)
+
+func prependLineNumbers(text string) string {
+	buf := bytes.NewBufferString("")
+	lines := strings.Split(text, "\n")
+	for i, line := range lines {
+		buf.WriteString(fmt.Sprintf("%2d: %s\n", i, line))
+	}
+	return buf.String()
+}
+
+type twoPassRenderer struct {
+	reader    func(string) ([]byte, error)
+	env       string
+	namespace string
+	filename  string
+	logger    *zap.SugaredLogger
+	abs       func(string) (string, error)
+}
+
+func (r *twoPassRenderer) renderEnvironment(content []byte) environment.Environment {
+	firstPassEnv := environment.Environment{Name: r.env, Values: map[string]interface{}(nil)}
+	tmplData := state.EnvironmentTemplateData{Environment: firstPassEnv, Namespace: r.namespace}
+	firstPassRenderer := tmpl.NewFirstPassRenderer(filepath.Dir(r.filename), tmplData)
+
+	// parse as much as we can, tolerate errors, this is a preparse
+	yamlBuf, err := firstPassRenderer.RenderTemplateContentToBuffer(content)
+	if err != nil && r.logger != nil {
+		r.logger.Debugf("first-pass rendering input of \"%s\":\n%s", r.filename, prependLineNumbers(string(content)))
+		if yamlBuf == nil { // we have a template syntax error, let the second parse report
+			r.logger.Debugf("template syntax error: %v", err)
+			return firstPassEnv
+		}
+	}
+	c := state.NewCreator(r.logger, r.reader, r.abs)
+	c.Strict = false
+	// create preliminary state, as we may have an environment. Tolerate errors.
+	prestate, err := c.CreateFromYaml(yamlBuf.Bytes(), r.filename, r.env)
+	if err != nil && r.logger != nil {
+		switch err.(type) {
+		case *state.StateLoadError:
+			r.logger.Infof("could not deduce `environment:` block, configuring only .Environment.Name. error: %v", err)
+		}
+		r.logger.Debugf("error in first-pass rendering: result of \"%s\":\n%s", r.filename, prependLineNumbers(yamlBuf.String()))
+	}
+	if prestate != nil {
+		firstPassEnv = prestate.Env
+	}
+	return firstPassEnv
+}
+
+func (r *twoPassRenderer) renderTemplate(content []byte) (*bytes.Buffer, error) {
+	// try a first pass render. This will always succeed, but can produce a limited env
+	firstPassEnv := r.renderEnvironment(content)
+
+	tmplData := state.EnvironmentTemplateData{Environment: firstPassEnv, Namespace: r.namespace}
+	secondPassRenderer := tmpl.NewFileRenderer(r.reader, filepath.Dir(r.filename), tmplData)
+	yamlBuf, err := secondPassRenderer.RenderTemplateContentToBuffer(content)
+	if err != nil {
+		if r.logger != nil {
+			r.logger.Debugf("second-pass rendering failed, input of \"%s\":\n%s", r.filename, prependLineNumbers(string(content)))
+		}
+		return nil, err
+	}
+	if r.logger != nil {
+		r.logger.Debugf("second-pass rendering result of \"%s\":\n%s", r.filename, prependLineNumbers(yamlBuf.String()))
+	}
+	return yamlBuf, nil
+}

pkg/app/two_pass_renderer_test.go

@@ -0,0 +1,256 @@
+package app
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/roboll/helmfile/helmexec"
+	"github.com/roboll/helmfile/state"
+	"gopkg.in/yaml.v2"
+)
+
+func makeRenderer(readFile func(string) ([]byte, error), env string) *twoPassRenderer {
+	return &twoPassRenderer{
+		reader:    readFile,
+		env:       env,
+		namespace: "namespace",
+		filename:  "",
+		logger:    helmexec.NewLogger(os.Stdout, "debug"),
+		abs:       filepath.Abs,
+	}
+}
+
+func TestReadFromYaml_MakeEnvironmentHasNoSideEffects(t *testing.T) {
+
+	yamlContent := []byte(`
+environments:
+  staging:
+    values:
+    - default/values.yaml
+  production:
+
+releases:
+- name: {{ readFile "other/default/values.yaml" }}
+  chart: mychart1
+`)
+
+	fileReaderCalls := 0
+	// make a reader that returns a simulated context
+	fileReader := func(filename string) ([]byte, error) {
+		expectedFilename := filepath.Clean("default/values.yaml")
+		if !strings.HasSuffix(filename, expectedFilename) {
+			return nil, fmt.Errorf("unexpected filename: expected=%s, actual=%s", expectedFilename, filename)
+		}
+		fileReaderCalls++
+		if fileReaderCalls == 2 {
+			return []byte("SecondPass"), nil
+		}
+		return []byte(""), nil
+	}
+
+	r := makeRenderer(fileReader, "staging")
+	yamlBuf, err := r.renderTemplate(yamlContent)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+
+	var state state.HelmState
+	err = yaml.Unmarshal(yamlBuf.Bytes(), &state)
+
+	if fileReaderCalls > 2 {
+		t.Error("reader should be called only twice")
+	}
+
+	if state.Releases[0].Name != "SecondPass" {
+		t.Errorf("release name should have ben set as SecondPass")
+	}
+}
+
+func TestReadFromYaml_RenderTemplate(t *testing.T) {
+
+	defaultValuesYaml := []byte(`
+releaseName: "hello"
+conditionalReleaseTag: "yes"
+`)
+
+	yamlContent := []byte(`
+environments:
+  staging:
+    values:
+    - default/values.yaml
+  production:
+
+releases:
+- name: {{ .Environment.Values.releaseName }}
+  chart: mychart1
+
+{{ if (eq .Environment.Values.conditionalReleaseTag "yes") }}
+- name: conditionalRelease
+{{ end }}
+
+`)
+
+	// make a reader that returns a simulated context
+	fileReader := func(filename string) ([]byte, error) {
+		expectedFilename := filepath.Clean("default/values.yaml")
+		if !strings.HasSuffix(filename, expectedFilename) {
+			return nil, fmt.Errorf("unexpected filename: expected=%s, actual=%s", expectedFilename, filename)
+		}
+		return defaultValuesYaml, nil
+	}
+
+	r := makeRenderer(fileReader, "staging")
+	// test the double rendering
+	yamlBuf, err := r.renderTemplate(yamlContent)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	var state state.HelmState
+	err = yaml.Unmarshal(yamlBuf.Bytes(), &state)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+
+	if len(state.Releases) != 2 {
+		t.Fatal("there should be 2 releases")
+	}
+
+	if state.Releases[0].Name != "hello" {
+		t.Errorf("release name should be hello")
+	}
+
+	if state.Releases[1].Name != "conditionalRelease" {
+		t.Error("conditional release should have been present")
+	}
+}
+
+func TestReadFromYaml_RenderTemplateWithValuesReferenceError(t *testing.T) {
+	defaultValuesYaml := []byte("")
+
+	yamlContent := []byte(`
+environments:
+  staging:
+    values:
+    - default/values.yaml
+  production:
+
+{{ if (eq .Environment.Values.releaseName "a") }} # line 8
+releases:
+- name: a
+	chart: mychart1
+{{ end }}
+`)
+
+	// make a reader that returns a simulated context
+	fileReader := func(filename string) ([]byte, error) {
+		return defaultValuesYaml, nil
+	}
+
+	r := makeRenderer(fileReader, "staging")
+	// test the double rendering
+	_, err := r.renderTemplate(yamlContent)
+
+	if !strings.Contains(err.Error(), "stringTemplate:8") {
+		t.Fatalf("error should contain a stringTemplate error (reference to unknow key) %v", err)
+	}
+}
+
+// This test shows that a gotmpl reference will get rendered correctly
+// even if the pre-render disables the readFile and exec functions.
+// This does not apply to .gotmpl files, which is a nice side-effect.
+func TestReadFromYaml_RenderTemplateWithGotmpl(t *testing.T) {
+
+	defaultValuesYamlGotmpl := []byte(`
+releaseName: {{ readFile "nonIgnoredFile" }}
+`)
+
+	yamlContent := []byte(`
+environments:
+  staging:
+    values:
+    - values.yaml.gotmpl
+  production:
+
+{{ if (eq .Environment.Values.releaseName "release-a") }} # line 8
+releases:
+- name: a
+  chart: mychart1
+{{ end }}
+`)
+
+	fileReader := func(filename string) ([]byte, error) {
+		if strings.HasSuffix(filename, "nonIgnoredFile") {
+			return []byte("release-a"), nil
+		}
+		return defaultValuesYamlGotmpl, nil
+	}
+
+	r := makeRenderer(fileReader, "staging")
+	rendered, _ := r.renderTemplate(yamlContent)
+
+	var state state.HelmState
+	yaml.Unmarshal(rendered.Bytes(), &state)
+
+	if len(state.Releases) != 1 {
+		t.Fatal("there should be 1 release")
+	}
+
+	if state.Releases[0].Name != "a" {
+		t.Fatal("release should have been declared")
+	}
+}
+
+func TestReadFromYaml_RenderTemplateWithNamespace(t *testing.T) {
+	defaultValuesYaml := []byte(``)
+	yamlContent := []byte(`releases:
+- name: {{ .Namespace }}-myrelease
+  chart: mychart
+`)
+
+	// make a reader that returns a simulated context
+	fileReader := func(filename string) ([]byte, error) {
+		return defaultValuesYaml, nil
+	}
+
+	r := makeRenderer(fileReader, "staging")
+	yamlBuf, err := r.renderTemplate(yamlContent)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	var state state.HelmState
+	err = yaml.Unmarshal(yamlBuf.Bytes(), &state)
+
+	if state.Releases[0].Name != "namespace-myrelease" {
+		t.Errorf("release name should be namespace-myrelease")
+	}
+}
+
+func TestReadFromYaml_HelfileShouldBeResilentToTemplateErrors(t *testing.T) {
+	yamlContent := []byte(`environments:
+  staging:
+	production:
+
+releases:
+{{ if (eq .Environment.Name "production" }}  # notice syntax error: unclosed left paren
+- name: prod-myrelease
+{{ else }}
+- name: myapp
+{{ end }}
+  chart: mychart
+`)
+	fileReader := func(filename string) ([]byte, error) {
+		return yamlContent, nil
+	}
+
+	r := makeRenderer(fileReader, "staging")
+	_, err := r.renderTemplate(yamlContent)
+	if err == nil {
+		t.Fatalf("wanted error, none returned")
+	}
+}

state/create.go

@@ -1,30 +1,98 @@
 package state
 
 import (
+	"bytes"
 	"fmt"
-	"github.com/imdario/mergo"
-	"github.com/roboll/helmfile/environment"
-	"github.com/roboll/helmfile/helmexec"
-	"github.com/roboll/helmfile/valuesfile"
-	"go.uber.org/zap"
-	"gopkg.in/yaml.v2"
+	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
+
+	"github.com/imdario/mergo"
+	"github.com/roboll/helmfile/environment"
+	"github.com/roboll/helmfile/helmexec"
+	"github.com/roboll/helmfile/tmpl"
+	"go.uber.org/zap"
+	"gopkg.in/yaml.v2"
 )
 
-func CreateFromYaml(content []byte, file string, env string, logger *zap.SugaredLogger) (*HelmState, error) {
-	return createFromYamlWithFileReader(content, file, env, logger, ioutil.ReadFile)
+type StateLoadError struct {
+	msg   string
+	Cause error
 }
 
-func createFromYamlWithFileReader(content []byte, file string, env string, logger *zap.SugaredLogger, readFile func(string) ([]byte, error)) (*HelmState, error) {
+func (e *StateLoadError) Error() string {
+	return fmt.Sprintf("%s: %v", e.msg, e.Cause)
+}
+
+type UndefinedEnvError struct {
+	msg string
+}
+
+func (e *UndefinedEnvError) Error() string {
+	return e.msg
+}
+
+func createFromYaml(content []byte, file string, env string, logger *zap.SugaredLogger) (*HelmState, error) {
+	c := &creator{
+		logger,
+		ioutil.ReadFile,
+		filepath.Abs,
+		true,
+	}
+	return c.CreateFromYaml(content, file, env)
+}
+
+type creator struct {
+	logger   *zap.SugaredLogger
+	readFile func(string) ([]byte, error)
+	abs      func(string) (string, error)
+
+	Strict bool
+}
+
+func NewCreator(logger *zap.SugaredLogger, readFile func(string) ([]byte, error), abs func(string) (string, error)) *creator {
+	return &creator{
+		logger:   logger,
+		readFile: readFile,
+		abs:      abs,
+		Strict:   true,
+	}
+}
+
+func (c *creator) CreateFromYaml(content []byte, file string, env string) (*HelmState, error) {
 	var state HelmState
 
-	state.basePath, _ = filepath.Abs(filepath.Dir(file))
-	if err := yaml.UnmarshalStrict(content, &state); err != nil {
-		return nil, err
+	basePath, err := c.abs(filepath.Dir(file))
+	if err != nil {
+		return nil, &StateLoadError{fmt.Sprintf("failed to read %s", file), err}
 	}
 	state.FilePath = file
+	state.basePath = basePath
+
+	decoder := yaml.NewDecoder(bytes.NewReader(content))
+	if !c.Strict {
+		decoder.SetStrict(false)
+	} else {
+		decoder.SetStrict(true)
+	}
+	i := 0
+	for {
+		i++
+
+		var intermediate HelmState
+
+		err := decoder.Decode(&intermediate)
+		if err == io.EOF {
+			break
+		} else if err != nil {
+			return nil, &StateLoadError{fmt.Sprintf("failed to read %s: reading document at index %d", file, i), err}
+		}
+
+		if err := mergo.Merge(&state, &intermediate, mergo.WithAppendSlice); err != nil {
+			return nil, &StateLoadError{fmt.Sprintf("failed to read %s: merging document at index %d", file, i), err}
+		}
+	}
 
 	if len(state.DeprecatedReleases) > 0 {
 		if len(state.Releases) > 0 {
@@ -34,26 +102,44 @@ func createFromYamlWithFileReader(content []byte, file string, env string, logge
 		state.DeprecatedReleases = []ReleaseSpec{}
 	}
 
-	state.logger = logger
-
-	e, err := state.loadEnv(env, readFile)
-	if err != nil {
-		return nil, err
+	if state.DeprecatedContext != "" && state.HelmDefaults.KubeContext == "" {
+		state.HelmDefaults.KubeContext = state.DeprecatedContext
 	}
-	state.env = *e
 
-	state.readFile = readFile
+	state.logger = c.logger
+
+	e, err := state.loadEnv(env, c.readFile)
+	if err != nil {
+		return nil, &StateLoadError{fmt.Sprintf("failed to read %s", file), err}
+	}
+	state.Env = *e
+
+	state.readFile = c.readFile
+	state.removeFile = os.Remove
+	state.fileExists = func(path string) (bool, error) {
+		_, err := os.Stat(path)
+
+		if err != nil {
+			if os.IsNotExist(err) {
+				return false, nil
+			}
+			return false, err
+		}
+		return true, nil
+	}
 
 	return &state, nil
 }
 
-func (state *HelmState) loadEnv(name string, readFile func(string) ([]byte, error)) (*environment.Environment, error) {
+func (st *HelmState) loadEnv(name string, readFile func(string) ([]byte, error)) (*environment.Environment, error) {
 	envVals := map[string]interface{}{}
-	envSpec, ok := state.Environments[name]
+	envSpec, ok := st.Environments[name]
 	if ok {
-		r := valuesfile.NewRenderer(readFile, state.basePath, environment.EmptyEnvironment)
 		for _, envvalFile := range envSpec.Values {
-			bytes, err := r.RenderToBytes(filepath.Join(state.basePath, envvalFile))
+			envvalFullPath := filepath.Join(st.basePath, envvalFile)
+			tmplData := EnvironmentTemplateData{Environment: environment.EmptyEnvironment, Namespace: ""}
+			r := tmpl.NewFileRenderer(readFile, filepath.Dir(envvalFullPath), tmplData)
+			bytes, err := r.RenderToBytes(envvalFullPath)
 			if err != nil {
 				return nil, fmt.Errorf("failed to load environment values file \"%s\": %v", envvalFile, err)
 			}
@@ -67,14 +153,23 @@ func (state *HelmState) loadEnv(name string, readFile func(string) ([]byte, erro
 		}
 
 		if len(envSpec.Secrets) > 0 {
-			helm := helmexec.New(state.logger, "")
+			helm := helmexec.New(st.logger, "")
 			for _, secFile := range envSpec.Secrets {
-				path := filepath.Join(state.basePath, secFile)
+				path := filepath.Join(st.basePath, secFile)
 				if _, err := os.Stat(path); os.IsNotExist(err) {
 					return nil, err
 				}
-
-				decFile, err := helm.DecryptSecret(path)
+				// Work-around to allow decrypting environment secrets
+				//
+				// We don't have releases loaded yet and therefore unable to decide whether
+				// helmfile should use helm-tiller to call helm-secrets or not.
+				//
+				// This means that, when you use environment secrets + tillerless setup, you still need a tiller
+				// installed on the cluster, just for decrypting secrets!
+				// Related: https://github.com/futuresimple/helm-secrets/issues/83
+				release := &ReleaseSpec{}
+				flags := st.appendTillerFlags([]string{}, release)
+				decFile, err := helm.DecryptSecret(st.createHelmContext(release, 0), path, flags...)
 				if err != nil {
 					return nil, err
 				}
@@ -92,7 +187,7 @@ func (state *HelmState) loadEnv(name string, readFile func(string) ([]byte, erro
 			}
 		}
 	} else if name != DefaultEnv {
-		return nil, fmt.Errorf("environment \"%s\" is not defined in \"%s\"", name, state.FilePath)
+		return nil, &UndefinedEnvError{msg: fmt.Sprintf("environment \"%s\" is not defined", name)}
 	}
 
 	return &environment.Environment{Name: name, Values: envVals}, nil

state/create_test.go

@@ -2,8 +2,12 @@ package state
 
 import (
 	"fmt"
+	"path/filepath"
 	"reflect"
 	"testing"
+
+	. "gotest.tools/assert"
+	"gotest.tools/assert/cmp"
 )
 
 func TestReadFromYaml(t *testing.T) {
@@ -13,7 +17,7 @@ func TestReadFromYaml(t *testing.T) {
   namespace: mynamespace
   chart: mychart
 `)
-	state, err := CreateFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
+	state, err := createFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
 	if err != nil {
 		t.Errorf("unxpected error: %v", err)
 	}
@@ -36,7 +40,7 @@ func TestReadFromYaml_InexistentEnv(t *testing.T) {
   namespace: mynamespace
   chart: mychart
 `)
-	_, err := CreateFromYaml(yamlContent, yamlFile, "production", logger)
+	_, err := createFromYaml(yamlContent, yamlFile, "production", logger)
 	if err == nil {
 		t.Error("expected error")
 	}
@@ -97,12 +101,12 @@ bar: {{ readFile "bar.txt" }}
 		return nil, fmt.Errorf("unexpected filename: %s", filename)
 	}
 
-	state, err := createFromYamlWithFileReader(yamlContent, yamlFile, "production", logger, readFile)
+	state, err := NewCreator(logger, readFile, filepath.Abs).CreateFromYaml(yamlContent, yamlFile, "production")
 	if err != nil {
 		t.Errorf("unexpected error: %v", err)
 	}
 
-	actual := state.env.Values
+	actual := state.Env.Values
 	if !reflect.DeepEqual(actual, expected) {
 		t.Errorf("unexpected environment values: expected=%v, actual=%v", expected, actual)
 	}
@@ -125,7 +129,7 @@ func TestReadFromYaml_StrictUnmarshalling(t *testing.T) {
   namespace: mynamespace
   releases: mychart
 `)
-	_, err := CreateFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
+	_, err := createFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
 	if err == nil {
 		t.Error("expected an error for wrong key 'releases' which is not in struct")
 	}
@@ -137,7 +141,7 @@ func TestReadFromYaml_DeprecatedReleaseReferences(t *testing.T) {
 - name: myrelease
   chart: mychart
 `)
-	state, err := CreateFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
+	state, err := createFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
 	if err != nil {
 		t.Errorf("unxpected error: %v", err)
 	}
@@ -159,7 +163,7 @@ releases:
 - name: myrelease2
   chart: mychart2
 `)
-	_, err := CreateFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
+	_, err := createFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
 	if err == nil {
 		t.Error("expected error")
 	}
@@ -195,7 +199,7 @@ func TestReadFromYaml_FilterReleasesOnLabels(t *testing.T) {
 		{LabelFilter{positiveLabels: [][]string{[]string{"tier", "frontend"}}, negativeLabels: [][]string{[]string{"foo", "bar"}}},
 			[]bool{false, true, false}},
 	}
-	state, err := CreateFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
+	state, err := createFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
 	if err != nil {
 		t.Errorf("unexpected error: %v", err)
 	}
@@ -234,7 +238,7 @@ func TestReadFromYaml_FilterNegatives(t *testing.T) {
 		{LabelFilter{negativeLabels: [][]string{[]string{"stage", "pre"}, []string{"stage", "post"}}},
 			[]bool{false, false, true}},
 	}
-	state, err := CreateFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
+	state, err := createFromYaml(yamlContent, yamlFile, DefaultEnv, logger)
 	if err != nil {
 		t.Errorf("unexpected error: %v", err)
 	}
@@ -246,3 +250,95 @@ func TestReadFromYaml_FilterNegatives(t *testing.T) {
 		}
 	}
 }
+
+func TestReadFromYaml_Helmfiles_Selectors(t *testing.T) {
+	tests := []struct {
+		path      string
+		content   []byte
+		wantErr   bool
+		helmfiles []SubHelmfileSpec
+	}{
+		{
+			path: "working/selector",
+			content: []byte(`helmfiles:
+- simple/helmfile.yaml
+- path: path/prefix/selector.yaml
+  selectors:
+    - name=zorba
+    - foo=bar
+- path: path/prefix/empty/selector.yaml
+  selectors: []
+- path: path/prefix/inherits/selector.yaml
+  selectorsInherited: true
+`),
+			wantErr: false,
+			helmfiles: []SubHelmfileSpec{{Path: "simple/helmfile.yaml", Selectors: nil, SelectorsInherited: false},
+				{Path: "path/prefix/selector.yaml", Selectors: []string{"name=zorba", "foo=bar"}, SelectorsInherited: false},
+				{Path: "path/prefix/empty/selector.yaml", Selectors: []string{}, SelectorsInherited: false},
+				{Path: "path/prefix/inherits/selector.yaml", Selectors: nil, SelectorsInherited: true},
+			},
+		},
+		{
+			path: "failing2/selector",
+			content: []byte(`helmfiles:
+- path: failing2/helmfile.yaml
+    wrongkey:
+`),
+			wantErr: true,
+		},
+		{
+			path: "failing3/selector",
+			content: []byte(`helmfiles:
+- path: failing3/helmfile.yaml
+    selectors: foo
+`),
+			wantErr: true,
+		},
+		{
+			path: "failing4/selector",
+			content: []byte(`helmfiles:
+- path: failing4/helmfile.yaml
+    selectors:
+`),
+			wantErr: true,
+		},
+		{
+			path: "failing4/selector",
+			content: []byte(`helmfiles:
+- path: failing4/helmfile.yaml
+    selectors:
+      - colon: not-authorized
+`),
+			wantErr: true,
+		},
+		{
+			path: "failing6/selector",
+			content: []byte(`helmfiles:
+- selectors:
+    - whatever
+`),
+			wantErr: true,
+		},
+		{
+			path: "failing7/selector",
+			content: []byte(`helmfiles:
+- path: foo/bar
+  selectors:
+  - foo=bar
+  selectorsInherited: true
+`),
+			wantErr: true,
+		},
+	}
+	for _, test := range tests {
+		st, err := createFromYaml(test.content, test.path, DefaultEnv, logger)
+		if err != nil {
+			if test.wantErr {
+				continue
+			} else {
+				t.Error("unexpected error:", err)
+			}
+		}
+		Assert(t, cmp.DeepEqual(st.Helmfiles, test.helmfiles), "for path %v", test.path)
+	}
+}

state/release.go

@@ -0,0 +1,73 @@
+package state
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/tmpl"
+	"gopkg.in/yaml.v2"
+)
+
+func (r ReleaseSpec) ExecuteTemplateExpressions(renderer *tmpl.FileRenderer) (*ReleaseSpec, error) {
+	var result *ReleaseSpec
+	var err error
+
+	result, err = r.Clone()
+	if err != nil {
+		return nil, fmt.Errorf("failed executing template expressions in release \"%s\": %v", r.Name, err)
+	}
+
+	{
+		ts := result.Chart
+		result.Chart, err = renderer.RenderTemplateContentToString([]byte(ts))
+		if err != nil {
+			return nil, fmt.Errorf("failed executing template expressions in release \"%s\".chart = \"%s\": %v", r.Name, ts, err)
+		}
+	}
+
+	{
+		ts := result.Namespace
+		result.Namespace, err = renderer.RenderTemplateContentToString([]byte(ts))
+		if err != nil {
+			return nil, fmt.Errorf("failed executing template expressions in release \"%s\".namespace = \"%s\": %v", r.Name, ts, err)
+		}
+	}
+
+	for i, t := range result.Values {
+		switch ts := t.(type) {
+		case string:
+			s, err := renderer.RenderTemplateContentToBuffer([]byte(ts))
+			if err != nil {
+				return nil, fmt.Errorf("failed executing template expressions in release \"%s\".values[%d] = \"%s\": %v", r.Name, i, ts, err)
+			}
+			result.Values[i] = s.String()
+		}
+	}
+
+	for i, ts := range result.Secrets {
+		s, err := renderer.RenderTemplateContentToBuffer([]byte(ts))
+		if err != nil {
+			return nil, fmt.Errorf("failed executing template expressions in release \"%s\".secrets[%d] = \"%s\": %v", r.Name, i, ts, err)
+		}
+		result.Secrets[i] = s.String()
+	}
+
+	return result, nil
+}
+
+func (r ReleaseSpec) Clone() (*ReleaseSpec, error) {
+	serialized, err := yaml.Marshal(r)
+	if err != nil {
+		return nil, fmt.Errorf("failed cloning release \"%s\": %v", r.Name, err)
+	}
+
+	var deserialized ReleaseSpec
+
+	if err := yaml.Unmarshal(serialized, &deserialized); err != nil {
+		return nil, fmt.Errorf("failed cloning release \"%s\": %v", r.Name, err)
+	}
+
+	return &deserialized, nil
+}
+
+func (r ReleaseSpec) Desired() bool {
+	return r.Installed == nil || *r.Installed
+}

state/release_filters.go

@@ -62,7 +62,7 @@ func ParseLabels(l string) (LabelFilter, error) {
 			kv := strings.Split(label, "=")
 			lf.positiveLabels = append(lf.positiveLabels, kv)
 		} else { // malformed case
-			err = fmt.Errorf("Malformed label: %s. Expected label in form k=v or k!=v", label)
+			return lf, fmt.Errorf("Malformed label: %s. Expected label in form k=v or k!=v", label)
 		}
 	}
 	return lf, err

state/state_exec_tmpl.go

@@ -0,0 +1,32 @@
+package state
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/tmpl"
+)
+
+func (st *HelmState) envTemplateData() EnvironmentTemplateData {
+	return EnvironmentTemplateData{
+		st.Env,
+		st.Namespace,
+	}
+}
+
+func (st *HelmState) ExecuteTemplates() (*HelmState, error) {
+	r := *st
+
+	for i, rt := range st.Releases {
+		tmplData := ReleaseTemplateData{
+			Environment: st.Env,
+			Release:     rt,
+		}
+		renderer := tmpl.NewFileRenderer(st.readFile, st.basePath, tmplData)
+		r, err := rt.ExecuteTemplateExpressions(renderer)
+		if err != nil {
+			return nil, fmt.Errorf("failed executing templates in release \"%s\".\"%s\": %v", st.FilePath, rt.Name, err)
+		}
+		st.Releases[i] = *r
+	}
+
+	return &r, nil
+}

state/state_exec_tmpl_test.go

@@ -0,0 +1,76 @@
+package state
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/roboll/helmfile/environment"
+)
+
+func TestHelmState_executeTemplates(t *testing.T) {
+	tests := []struct {
+		name  string
+		input ReleaseSpec
+		want  ReleaseSpec
+	}{
+		{
+			name: "Has template expressions in chart, values, and secrets",
+			input: ReleaseSpec{
+				Chart:     "test-charts/{{ .Release.Name }}",
+				Version:   "0.1",
+				Verify:    nil,
+				Name:      "test-app",
+				Namespace: "test-namespace-{{ .Release.Name }}",
+				Values:    []interface{}{"config/{{ .Environment.Name }}/{{ .Release.Name }}/values.yaml"},
+				Secrets:   []string{"config/{{ .Environment.Name }}/{{ .Release.Name }}/secrets.yaml"},
+			},
+			want: ReleaseSpec{
+				Chart:     "test-charts/test-app",
+				Version:   "0.1",
+				Verify:    nil,
+				Name:      "test-app",
+				Namespace: "test-namespace-test-app",
+				Values:    []interface{}{"config/test_env/test-app/values.yaml"},
+				Secrets:   []string{"config/test_env/test-app/secrets.yaml"},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			state := &HelmState{
+				basePath: ".",
+				HelmDefaults: HelmSpec{
+					KubeContext: "test_context",
+				},
+				Env:          environment.Environment{Name: "test_env"},
+				Namespace:    "test-namespace_",
+				Repositories: nil,
+				Releases: []ReleaseSpec{
+					tt.input,
+				},
+			}
+
+			r, err := state.ExecuteTemplates()
+			if err != nil {
+				t.Errorf("Unexpected error: %v", err)
+				t.FailNow()
+			}
+
+			actual := r.Releases[0]
+
+			if !reflect.DeepEqual(actual.Chart, tt.want.Chart) {
+				t.Errorf("expected %+v, got %+v", tt.want.Chart, actual.Chart)
+			}
+			if !reflect.DeepEqual(actual.Namespace, tt.want.Namespace) {
+				t.Errorf("expected %+v, got %+v", tt.want.Namespace, actual.Namespace)
+			}
+			if !reflect.DeepEqual(actual.Values, tt.want.Values) {
+				t.Errorf("expected %+v, got %+v", tt.want.Values, actual.Values)
+			}
+			if !reflect.DeepEqual(actual.Secrets, tt.want.Secrets) {
+				t.Errorf("expected %+v, got %+v", tt.want.Secrets, actual.Secrets)
+			}
+		})
+	}
+}

state/state_run.go

@@ -0,0 +1,89 @@
+package state
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/helmexec"
+	"sync"
+)
+
+type result struct {
+	release ReleaseSpec
+	err     error
+}
+
+func (st *HelmState) scatterGather(concurrency int, items int, produceInputs func(), receiveInputsAndProduceIntermediates func(int), aggregateIntermediates func()) {
+	numReleases := len(st.Releases)
+	if concurrency < 1 {
+		concurrency = numReleases
+	} else if concurrency > numReleases {
+		concurrency = numReleases
+	}
+
+	// WaitGroup is required to wait until goroutine per job in job queue cleanly stops.
+	var waitGroup sync.WaitGroup
+	waitGroup.Add(concurrency)
+
+	go produceInputs()
+
+	for w := 1; w <= concurrency; w++ {
+		go func(id int) {
+			st.logger.Debugf("worker %d/%d started", id, concurrency)
+			receiveInputsAndProduceIntermediates(id)
+			st.logger.Debugf("worker %d/%d finished", id, concurrency)
+			waitGroup.Done()
+		}(w)
+	}
+
+	aggregateIntermediates()
+
+	// Wait until all the goroutines to gracefully finish
+	waitGroup.Wait()
+}
+
+func (st *HelmState) scatterGatherReleases(helm helmexec.Interface, concurrency int,
+	do func(ReleaseSpec, int) error) []error {
+	var errs []error
+
+	inputs := st.Releases
+	inputsSize := len(inputs)
+
+	releases := make(chan ReleaseSpec)
+	results := make(chan result)
+
+	st.scatterGather(
+		concurrency,
+		inputsSize,
+		func() {
+			for _, release := range inputs {
+				releases <- release
+			}
+			close(releases)
+		},
+		func(id int) {
+			for release := range releases {
+				err := do(release, id)
+				st.logger.Debugf("sending result for release: %s\n", release.Name)
+				results <- result{release: release, err: err}
+				st.logger.Debugf("sent result for release: %s\n", release.Name)
+			}
+		},
+		func() {
+			for i := range inputs {
+				st.logger.Debugf("receiving result %d", i)
+				r := <-results
+				if r.err != nil {
+					errs = append(errs, fmt.Errorf("release \"%s\" failed: %v", r.release.Name, r.err))
+				} else {
+					st.logger.Debugf("received result for release \"%s\"", r.release.Name)
+				}
+				st.logger.Debugf("received result for %d", i)
+			}
+		},
+	)
+
+	if len(errs) != 0 {
+		return errs
+	}
+
+	return nil
+}

state/types.go

@@ -0,0 +1,24 @@
+package state
+
+import "github.com/roboll/helmfile/environment"
+
+// TemplateSpec defines the structure of a reusable and composable template for helm releases.
+type TemplateSpec struct {
+	ReleaseSpec `yaml:",inline"`
+}
+
+// EnvironmentTemplateData provides variables accessible while executing golang text/template expressions in helmfile and values YAML files
+type EnvironmentTemplateData struct {
+	// Environment is accessible as `.Environment` from any template executed by the renderer
+	Environment environment.Environment
+	// Namespace is accessible as `.Namespace` from any non-values template executed by the renderer
+	Namespace string
+}
+
+// ReleaseTemplateData provides variables accessible while executing golang text/template expressions in releases of a helmfile YAML file
+type ReleaseTemplateData struct {
+	// Environment is accessible as `.Environment` from any template expression executed by the renderer
+	Environment environment.Environment
+	// Release is accessible as `.Release` from any template expression executed by the renderer
+	Release ReleaseSpec
+}

test/integration/happypath.yaml

@@ -2,7 +2,8 @@ repositories:
   - name: stable
     url: https://kubernetes-charts.storage.googleapis.com/
 
-context: minikube
+helmDefaults:
+  kubeContext: minikube
 
 releases:
 

test/integration/run.sh

@@ -47,6 +47,7 @@ set -e
 info "Using namespace: ${test_ns}"
 info "Using Helm version: $(helm version --short --client | grep -o v.*$)"
 ${helm} init --wait --override spec.template.spec.automountServiceAccountToken=true
+${helm} plugin install https://github.com/databus23/helm-diff --version master
 ${kubectl} get namespace ${test_ns} &> /dev/null && warn "Namespace ${test_ns} exists, from a previous test run?"
 $kubectl create namespace ${test_ns} || fail "Could not create namespace ${test_ns}"
 trap "{ $kubectl delete namespace ${test_ns}; }" EXIT # remove namespace whenever we exit this script
@@ -55,14 +56,33 @@ trap "{ $kubectl delete namespace ${test_ns}; }" EXIT # remove namespace wheneve
 # TEST CASES----------------------------------------------------------------------------------------------------------
 
 test_start "happypath - simple rollout of httpbin chart"
+
+info "Diffing ${dir}/happypath.yaml"
+bash -c "${helmfile} -f ${dir}/happypath.yaml diff --detailed-exitcode; code="'$?'"; [ "'${code}'" -eq 2 ]" || fail "unexpected exit code returned by helmfile diff"
+
+info "Templating ${dir}/happypath.yaml"
+${helmfile} -f ${dir}/happypath.yaml template
+code=$?
+[ ${code} -eq 0 ] || fail "unexpected exit code returned by helmfile template: ${code}"
+
 info "Syncing ${dir}/happypath.yaml"
 ${helmfile} -f ${dir}/happypath.yaml sync
 wait_deploy_ready httpbin-httpbin
 retry 5 "curl --fail $(minikube service --url --namespace=${test_ns} httpbin-httpbin)/status/200"
 [ ${retry_result} -eq 0 ] || fail "httpbin failed to return 200 OK"
+
+info "Applying ${dir}/happypath.yaml"
+${helmfile} -f ${dir}/happypath.yaml apply
+code=$?
+[ ${code} -eq 0 ] || fail "unexpected exit code returned by helmfile apply: ${code}"
+
 info "Deleting release"
 ${helmfile} -f ${dir}/happypath.yaml delete
 ${helm} status --namespace=${test_ns} httpbin &> /dev/null && fail "release should not exist anymore after a delete"
+
+info "Ensuring \"helmfile delete\" doesn't fail when no releases installed"
+${helmfile} -f ${dir}/happypath.yaml delete || fail "\"helmfile delete\" shouldn't fail when there are no installed releases"
+
 test_pass "happypath"
 
 

tmpl/context.go

@@ -1,6 +1,7 @@
 package tmpl
 
 type Context struct {
-	basePath string
-	readFile func(string) ([]byte, error)
+	preRender bool
+	basePath  string
+	readFile  func(string) ([]byte, error)
 }

tmpl/context_funcs.go

@@ -3,8 +3,11 @@ package tmpl
 import (
 	"fmt"
 	"gopkg.in/yaml.v2"
+	"io"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"reflect"
 	"strings"
 	"text/template"
 )
@@ -12,17 +15,112 @@ import (
 type Values = map[string]interface{}
 
 func (c *Context) createFuncMap() template.FuncMap {
-	return template.FuncMap{
+	funcMap := template.FuncMap{
+		"exec":           c.Exec,
 		"readFile":       c.ReadFile,
 		"toYaml":         ToYaml,
 		"fromYaml":       FromYaml,
 		"setValueAtPath": SetValueAtPath,
 		"requiredEnv":    RequiredEnv,
+		"get":            get,
+		"getOrNil":       getOrNil,
+		"tpl":            c.Tpl,
+	}
+	if c.preRender {
+		// disable potential side-effect template calls
+		funcMap["exec"] = func(string, []interface{}, ...string) (string, error) {
+			return "", nil
+		}
+		funcMap["readFile"] = func(string) (string, error) {
+			return "", nil
+		}
+	}
+
+	return funcMap
+}
+
+func (c *Context) Exec(command string, args []interface{}, inputs ...string) (string, error) {
+	var input string
+	if len(inputs) > 0 {
+		input = inputs[0]
+	}
+
+	strArgs := make([]string, len(args))
+	for i, a := range args {
+		switch a.(type) {
+		case string:
+			strArgs[i] = a.(string)
+		default:
+			return "", fmt.Errorf("unexpected type of arg \"%s\" in args %v at index %d", reflect.TypeOf(a), args, i)
+		}
+	}
+
+	cmd := exec.Command(command, strArgs...)
+	cmd.Dir = c.basePath
+
+	writeErrs := make(chan error)
+	cmdErrs := make(chan error)
+	cmdOuts := make(chan []byte)
+
+	if len(input) > 0 {
+		stdin, err := cmd.StdinPipe()
+		if err != nil {
+			return "", err
+		}
+		go func(input string, stdin io.WriteCloser) {
+			defer stdin.Close()
+			defer close(writeErrs)
+
+			size := len(input)
+
+			var n int
+			var err error
+			i := 0
+			for {
+				n, err = io.WriteString(stdin, input[i:])
+				if err != nil {
+					writeErrs <- fmt.Errorf("failed while writing %d bytes to stdin of \"%s\": %v", len(input), command, err)
+					break
+				}
+				i += n
+				if n == size {
+					break
+				}
+			}
+		}(input, stdin)
+	}
+
+	go func() {
+		defer close(cmdOuts)
+		defer close(cmdErrs)
+
+		bytes, err := cmd.Output()
+		if err != nil {
+			cmdErrs <- fmt.Errorf("exec cmd=%s args=[%s] failed: %v", command, strings.Join(strArgs, ", "), err)
+		} else {
+			cmdOuts <- bytes
+		}
+	}()
+
+	for {
+		select {
+		case bytes := <-cmdOuts:
+			return string(bytes), nil
+		case err := <-cmdErrs:
+			return "", err
+		case err := <-writeErrs:
+			return "", err
+		}
 	}
 }
 
 func (c *Context) ReadFile(filename string) (string, error) {
-	path := filepath.Join(c.basePath, filename)
+	var path string
+	if filepath.IsAbs(filename) {
+		path = filename
+	} else {
+		path = filepath.Join(c.basePath, filename)
+	}
 
 	bytes, err := c.readFile(path)
 	if err != nil {
@@ -31,6 +129,14 @@ func (c *Context) ReadFile(filename string) (string, error) {
 	return string(bytes), nil
 }
 
+func (c *Context) Tpl(text string, data interface{}) (string, error) {
+	buf, err := c.RenderTemplateToBuffer(text, data)
+	if err != nil {
+		return "", err
+	}
+	return buf.String(), nil
+}
+
 func ToYaml(v interface{}) (string, error) {
 	data, err := yaml.Marshal(v)
 	if err != nil {

tmpl/context_funcs_test.go

@@ -2,6 +2,7 @@ package tmpl
 
 import (
 	"fmt"
+	"path/filepath"
 	"reflect"
 	"testing"
 )
@@ -11,7 +12,27 @@ func TestReadFile(t *testing.T) {
   bar: BAR
 `
 	expectedFilename := "values.yaml"
-	ctx := &Context{readFile: func(filename string) ([]byte, error) {
+	ctx := &Context{basePath: ".", readFile: func(filename string) ([]byte, error) {
+		if filename != expectedFilename {
+			return nil, fmt.Errorf("unexpected filename: expected=%v, actual=%s", expectedFilename, filename)
+		}
+		return []byte(expected), nil
+	}}
+	actual, err := ctx.ReadFile(expectedFilename)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if !reflect.DeepEqual(actual, expected) {
+		t.Errorf("unexpected result: expected=%v, actual=%v", expected, actual)
+	}
+}
+
+func TestReadFile_PassAbsPath(t *testing.T) {
+	expected := `foo:
+  bar: BAR
+`
+	expectedFilename, _ := filepath.Abs("values.yaml")
+	ctx := &Context{basePath: ".", readFile: func(filename string) ([]byte, error) {
 		if filename != expectedFilename {
 			return nil, fmt.Errorf("unexpected filename: expected=%v, actual=%s", expectedFilename, filename)
 		}
@@ -97,3 +118,18 @@ func TestSetValueAtPath_TwoComponents(t *testing.T) {
 		t.Errorf("unexpected result: expected=%v, actual=%v", expected, actual)
 	}
 }
+
+func TestTpl(t *testing.T) {
+	text := `foo: {{ .foo }}
+`
+	expected := `foo: FOO
+`
+	ctx := &Context{basePath: "."}
+	actual, err := ctx.Tpl(text, map[string]interface{}{"foo": "FOO"})
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if !reflect.DeepEqual(actual, expected) {
+		t.Errorf("unexpected result: expected=%v, actual=%v", expected, actual)
+	}
+}

tmpl/context_tmpl.go

@@ -11,7 +11,13 @@ func (c *Context) stringTemplate() *template.Template {
 	for name, f := range c.createFuncMap() {
 		funcMap[name] = f
 	}
-	return template.New("stringTemplate").Funcs(funcMap)
+	tmpl := template.New("stringTemplate").Funcs(funcMap)
+	if c.preRender {
+		tmpl.Option("missingkey=zero")
+	} else {
+		tmpl.Option("missingkey=error")
+	}
+	return tmpl
 }
 
 func (c *Context) RenderTemplateToBuffer(s string, data ...interface{}) (*bytes.Buffer, error) {
@@ -28,7 +34,7 @@ func (c *Context) RenderTemplateToBuffer(s string, data ...interface{}) (*bytes.
 	var execErr = t.Execute(&tplString, d)
 
 	if execErr != nil {
-		return nil, execErr
+		return &tplString, execErr
 	}
 
 	return &tplString, nil

tmpl/context_tmpl_test.go

@@ -60,11 +60,61 @@ func TestRenderTemplate_WithData(t *testing.T) {
 	}
 }
 
-func renderTemplateToString(s string) (string, error) {
+func TestRenderTemplate_AccessingMissingKeyWithGetOrNil(t *testing.T) {
+	valuesYamlContent := `foo:
+  bar: {{ . | getOrNil "foo.bar" }}
+`
+	expected := `foo:
+  bar: <no value>
+`
+	expectedFilename := "values.yaml"
+	data := map[string]interface{}{}
+	ctx := &Context{readFile: func(filename string) ([]byte, error) {
+		if filename != expectedFilename {
+			return nil, fmt.Errorf("unexpected filename: expected=%v, actual=%s", expectedFilename, filename)
+		}
+		return []byte(valuesYamlContent), nil
+	}}
+	buf, err := ctx.RenderTemplateToBuffer(valuesYamlContent, data)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	actual := buf.String()
+	if !reflect.DeepEqual(actual, expected) {
+		t.Errorf("unexpected result: expected=%v, actual=%v", expected, actual)
+	}
+}
+
+func TestRenderTemplate_Defaulting(t *testing.T) {
+	valuesYamlContent := `foo:
+  bar: {{ . | getOrNil "foo.bar" | default "DEFAULT" }}
+`
+	expected := `foo:
+  bar: DEFAULT
+`
+	expectedFilename := "values.yaml"
+	data := map[string]interface{}{}
+	ctx := &Context{readFile: func(filename string) ([]byte, error) {
+		if filename != expectedFilename {
+			return nil, fmt.Errorf("unexpected filename: expected=%v, actual=%s", expectedFilename, filename)
+		}
+		return []byte(valuesYamlContent), nil
+	}}
+	buf, err := ctx.RenderTemplateToBuffer(valuesYamlContent, data)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	actual := buf.String()
+	if !reflect.DeepEqual(actual, expected) {
+		t.Errorf("unexpected result: expected=%v, actual=%v", expected, actual)
+	}
+}
+
+func renderTemplateToString(s string, data ...interface{}) (string, error) {
 	ctx := &Context{readFile: func(filename string) ([]byte, error) {
 		return nil, fmt.Errorf("unexpected call to readFile: filename=%s", filename)
 	}}
-	tplString, err := ctx.RenderTemplateToBuffer(s)
+	tplString, err := ctx.RenderTemplateToBuffer(s, data...)
 	if err != nil {
 		return "", err
 	}
@@ -75,6 +125,7 @@ func Test_renderTemplateToString(t *testing.T) {
 	type args struct {
 		s    string
 		envs map[string]string
+		data interface{}
 	}
 	tests := []struct {
 		name    string
@@ -127,6 +178,18 @@ func Test_renderTemplateToString(t *testing.T) {
 			want:    "7",
 			wantErr: false,
 		},
+		{
+			name: "get",
+			args: args{
+				s:    `{{ . | get "Foo" }}, {{ . | get "Bar" "2" }}`,
+				envs: map[string]string{},
+				data: map[string]interface{}{
+					"Foo": "1",
+				},
+			},
+			want:    "1, 2",
+			wantErr: false,
+		},
 		{
 			name: "env var not set",
 			args: args{
@@ -175,7 +238,7 @@ func Test_renderTemplateToString(t *testing.T) {
 					t.Error("renderTemplateToString() could not set env var for testing")
 				}
 			}
-			got, err := renderTemplateToString(tt.args.s)
+			got, err := renderTemplateToString(tt.args.s, tt.args.data)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("renderTemplateToString() for %s error = %v, wantErr %v", tt.name, err, tt.wantErr)
 				return

tmpl/file.go

@@ -1,43 +0,0 @@
-package tmpl
-
-import (
-	"bytes"
-	"github.com/roboll/helmfile/environment"
-)
-
-type templateFileRenderer struct {
-	ReadFile func(string) ([]byte, error)
-	Context  *Context
-	Data     TemplateData
-}
-
-type TemplateData struct {
-	// Environment is accessible as `.Environment` from any template executed by the renderer
-	Environment environment.Environment
-}
-
-type FileRenderer interface {
-	RenderTemplateFileToBuffer(file string) (*bytes.Buffer, error)
-}
-
-func NewFileRenderer(readFile func(filename string) ([]byte, error), basePath string, env environment.Environment) *templateFileRenderer {
-	return &templateFileRenderer{
-		ReadFile: readFile,
-		Context: &Context{
-			basePath: basePath,
-			readFile: readFile,
-		},
-		Data: TemplateData{
-			Environment: env,
-		},
-	}
-}
-
-func (r *templateFileRenderer) RenderTemplateFileToBuffer(file string) (*bytes.Buffer, error) {
-	content, err := r.ReadFile(file)
-	if err != nil {
-		return nil, err
-	}
-
-	return r.Context.RenderTemplateToBuffer(string(content), r.Data)
-}

tmpl/file_renderer.go

@@ -0,0 +1,78 @@
+package tmpl
+
+import (
+	"bytes"
+	"io/ioutil"
+
+	"fmt"
+	"strings"
+)
+
+type FileRenderer struct {
+	ReadFile func(string) ([]byte, error)
+	Context  *Context
+	Data     interface{}
+}
+
+func NewFileRenderer(readFile func(filename string) ([]byte, error), basePath string, data interface{}) *FileRenderer {
+	return &FileRenderer{
+		ReadFile: readFile,
+		Context: &Context{
+			basePath: basePath,
+			readFile: readFile,
+		},
+		Data: data,
+	}
+}
+
+func NewFirstPassRenderer(basePath string, data interface{}) *FileRenderer {
+	return &FileRenderer{
+		ReadFile: ioutil.ReadFile,
+		Context: &Context{
+			preRender: true,
+			basePath:  basePath,
+			readFile:  ioutil.ReadFile,
+		},
+		Data: data,
+	}
+}
+
+func (r *FileRenderer) RenderTemplateFileToBuffer(file string) (*bytes.Buffer, error) {
+	content, err := r.ReadFile(file)
+	if err != nil {
+		return nil, err
+	}
+
+	return r.RenderTemplateContentToBuffer(content)
+}
+
+func (r *FileRenderer) RenderToBytes(path string) ([]byte, error) {
+	var yamlBytes []byte
+	splits := strings.Split(path, ".")
+	if len(splits) > 0 && splits[len(splits)-1] == "gotmpl" {
+		yamlBuf, err := r.RenderTemplateFileToBuffer(path)
+		if err != nil {
+			return nil, fmt.Errorf("failed to render [%s], because of %v", path, err)
+		}
+		yamlBytes = yamlBuf.Bytes()
+	} else {
+		var err error
+		yamlBytes, err = r.ReadFile(path)
+		if err != nil {
+			return nil, fmt.Errorf("failed to load [%s]: %v", path, err)
+		}
+	}
+	return yamlBytes, nil
+}
+
+func (r *FileRenderer) RenderTemplateContentToBuffer(content []byte) (*bytes.Buffer, error) {
+	return r.Context.RenderTemplateToBuffer(string(content), r.Data)
+}
+
+func (r *FileRenderer) RenderTemplateContentToString(content []byte) (string, error) {
+	buf, err := r.Context.RenderTemplateToBuffer(string(content), r.Data)
+	if err != nil {
+		return "", err
+	}
+	return buf.String(), nil
+}

tmpl/file_renderer_test.go

@@ -1,4 +1,4 @@
-package valuesfile
+package tmpl
 
 import (
 	"fmt"
@@ -7,6 +7,11 @@ import (
 	"testing"
 )
 
+var emptyEnvTmplData = map[string]interface{}{
+	"Environment": environment.EmptyEnvironment,
+	"Namespace":   "",
+}
+
 func TestRenderToBytes_Gotmpl(t *testing.T) {
 	valuesYamlTmplContent := `foo:
   bar: '{{ readFile "data.txt" }}'
@@ -17,7 +22,7 @@ func TestRenderToBytes_Gotmpl(t *testing.T) {
 `
 	dataFile := "data.txt"
 	valuesTmplFile := "values.yaml.gotmpl"
-	r := NewRenderer(func(filename string) ([]byte, error) {
+	r := NewFileRenderer(func(filename string) ([]byte, error) {
 		switch filename {
 		case valuesTmplFile:
 			return []byte(valuesYamlTmplContent), nil
@@ -25,7 +30,7 @@ func TestRenderToBytes_Gotmpl(t *testing.T) {
 			return []byte(dataFileContent), nil
 		}
 		return nil, fmt.Errorf("unexpected filename: expected=%v or %v, actual=%s", dataFile, valuesTmplFile, filename)
-	}, "", environment.EmptyEnvironment)
+	}, "", emptyEnvTmplData)
 	buf, err := r.RenderToBytes(valuesTmplFile)
 	if err != nil {
 		t.Errorf("unexpected error: %v", err)
@@ -44,13 +49,13 @@ func TestRenderToBytes_Yaml(t *testing.T) {
   bar: '{{ readFile "data.txt" }}'
 `
 	valuesFile := "values.yaml"
-	r := NewRenderer(func(filename string) ([]byte, error) {
+	r := NewFileRenderer(func(filename string) ([]byte, error) {
 		switch filename {
 		case valuesFile:
 			return []byte(valuesYamlContent), nil
 		}
 		return nil, fmt.Errorf("unexpected filename: expected=%v, actual=%s", valuesFile, filename)
-	}, "", environment.EmptyEnvironment)
+	}, "", emptyEnvTmplData)
 	buf, err := r.RenderToBytes(valuesFile)
 	if err != nil {
 		t.Errorf("unexpected error: %v", err)

tmpl/get_or_nil.go

@@ -0,0 +1,91 @@
+package tmpl
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+type noValueError struct {
+	msg string
+}
+
+func (e *noValueError) Error() string {
+	return e.msg
+}
+
+func get(path string, varArgs ...interface{}) (interface{}, error) {
+	var defSet bool
+	var def interface{}
+	var obj interface{}
+	switch len(varArgs) {
+	case 1:
+		defSet = false
+		def = nil
+		obj = varArgs[0]
+	case 2:
+		defSet = true
+		def = varArgs[0]
+		obj = varArgs[1]
+	default:
+		return nil, fmt.Errorf("unexpected number of args pased to the template function get(path, [def, ]obj): expected 1 or 2, got %d, args was %v", len(varArgs), varArgs)
+	}
+
+	if path == "" {
+		return obj, nil
+	}
+	keys := strings.Split(path, ".")
+	var v interface{}
+	var ok bool
+	switch typedObj := obj.(type) {
+	case map[string]interface{}:
+		v, ok = typedObj[keys[0]]
+		if !ok {
+			if defSet {
+				return def, nil
+			}
+			return nil, &noValueError{fmt.Sprintf("no value exist for key \"%s\" in %v", keys[0], typedObj)}
+		}
+	case map[interface{}]interface{}:
+		v, ok = typedObj[keys[0]]
+		if !ok {
+			if defSet {
+				return def, nil
+			}
+			return nil, &noValueError{fmt.Sprintf("no value exist for key \"%s\" in %v", keys[0], typedObj)}
+		}
+	default:
+		maybeStruct := reflect.ValueOf(typedObj)
+		if maybeStruct.Kind() != reflect.Struct {
+			return nil, &noValueError{fmt.Sprintf("unexpected type(%v) of value for key \"%s\": it must be either map[string]interface{} or any struct", reflect.TypeOf(obj), keys[0])}
+		} else if maybeStruct.NumField() < 1 {
+			return nil, &noValueError{fmt.Sprintf("no accessible struct fields for key \"%s\"", keys[0])}
+		}
+		f := maybeStruct.FieldByName(keys[0])
+		if !f.IsValid() {
+			if defSet {
+				return def, nil
+			}
+			return nil, &noValueError{fmt.Sprintf("no field named \"%s\" exist in %v", keys[0], typedObj)}
+		}
+		v = f.Interface()
+	}
+
+	if defSet {
+		return get(strings.Join(keys[1:], "."), def, v)
+	}
+	return get(strings.Join(keys[1:], "."), v)
+}
+
+func getOrNil(path string, o interface{}) (interface{}, error) {
+	v, err := get(path, o)
+	if err != nil {
+		switch err.(type) {
+		case *noValueError:
+			return nil, nil
+		default:
+			return nil, err
+		}
+	}
+	return v, nil
+}

tmpl/get_or_nil_test.go

@@ -0,0 +1,128 @@
+package tmpl
+
+import (
+	"testing"
+)
+
+type EmptyStruct struct {
+}
+
+func TestGetStruct(t *testing.T) {
+	type Foo struct{ Bar string }
+
+	obj := struct{ Foo }{Foo{Bar: "Bar"}}
+
+	v1, err := get("Foo.Bar", obj)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if v1 != "Bar" {
+		t.Errorf("unexpected value for path Foo.Bar in %v: expected=Bar, actual=%v", obj, v1)
+	}
+
+	_, err = get("Foo.baz", obj)
+
+	if err == nil {
+		t.Errorf("expected error but was not occurred")
+	}
+
+	_, err = get("foo", EmptyStruct{})
+
+	if err == nil {
+		t.Errorf("expected error but was not occurred")
+	}
+}
+
+func TestGetMap(t *testing.T) {
+	obj := map[string]interface{}{"Foo": map[string]interface{}{"Bar": "Bar"}}
+
+	v1, err := get("Foo.Bar", obj)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if v1 != "Bar" {
+		t.Errorf("unexpected value for path Foo.Bar in %v: expected=Bar, actual=%v", obj, v1)
+	}
+
+	_, err = get("Foo.baz", obj)
+
+	if err == nil {
+		t.Errorf("expected error but was not occurred")
+	}
+}
+
+func TestGet_Default(t *testing.T) {
+	obj := map[string]interface{}{"Foo": map[string]interface{}{}, "foo": 1}
+
+	v1, err := get("Foo.Bar", "Bar", obj)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if v1 != "Bar" {
+		t.Errorf("unexpected value for path Foo.Bar in %v: expected=Bar, actual=%v", obj, v1)
+	}
+
+	v2, err := get("Baz", "Baz", obj)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if v2 != "Baz" {
+		t.Errorf("unexpected value for path Baz in %v: expected=Baz, actual=%v", obj, v2)
+	}
+
+	_, err = get("foo.Bar", "fooBar", obj)
+
+	if err == nil {
+		t.Errorf("expected error but was not occurred")
+	}
+}
+
+func TestGetOrNilStruct(t *testing.T) {
+	type Foo struct{ Bar string }
+
+	obj := struct{ Foo }{Foo{Bar: "Bar"}}
+
+	v1, err := getOrNil("Foo.Bar", obj)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if v1 != "Bar" {
+		t.Errorf("unexpected value for path Foo.Bar in %v: expected=Bar, actual=%v", obj, v1)
+	}
+
+	v2, err := getOrNil("Foo.baz", obj)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if v2 != nil {
+		t.Errorf("unexpected value for path Foo.baz in %v: expected=nil, actual=%v", obj, v2)
+	}
+}
+
+func TestGetOrNilMap(t *testing.T) {
+	obj := map[string]interface{}{"Foo": map[string]interface{}{"Bar": "Bar"}}
+
+	v1, err := getOrNil("Foo.Bar", obj)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if v1 != "Bar" {
+		t.Errorf("unexpected value for path Foo.Bar in %v: expected=Bar, actual=%v", obj, v1)
+	}
+
+	v2, err := getOrNil("Foo.baz", obj)
+
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if v2 != nil {
+		t.Errorf("unexpected value for path Foo.baz in %v: expected=nil, actual=%v", obj, v2)
+	}
+}

tmpl/text_renderer.go

@@ -0,0 +1,30 @@
+package tmpl
+
+type templateTextRenderer struct {
+	ReadText func(string) ([]byte, error)
+	Context  *Context
+	Data     interface{}
+}
+
+type TextRenderer interface {
+	RenderTemplateText(text string) (string, error)
+}
+
+func NewTextRenderer(readFile func(filename string) ([]byte, error), basePath string, data interface{}) *templateTextRenderer {
+	return &templateTextRenderer{
+		ReadText: readFile,
+		Context: &Context{
+			basePath: basePath,
+			readFile: readFile,
+		},
+		Data: data,
+	}
+}
+
+func (r *templateTextRenderer) RenderTemplateText(text string) (string, error) {
+	buf, err := r.Context.RenderTemplateToBuffer(text, r.Data)
+	if err != nil {
+		return "", err
+	}
+	return buf.String(), nil
+}

valuesfile/valuesfile.go

@@ -1,39 +0,0 @@
-package valuesfile
-
-import (
-	"fmt"
-	"github.com/roboll/helmfile/environment"
-	"github.com/roboll/helmfile/tmpl"
-	"strings"
-)
-
-type renderer struct {
-	readFile         func(string) ([]byte, error)
-	tmplFileRenderer tmpl.FileRenderer
-}
-
-func NewRenderer(readFile func(filename string) ([]byte, error), basePath string, env environment.Environment) *renderer {
-	return &renderer{
-		readFile:         readFile,
-		tmplFileRenderer: tmpl.NewFileRenderer(readFile, basePath, env),
-	}
-}
-
-func (r *renderer) RenderToBytes(path string) ([]byte, error) {
-	var yamlBytes []byte
-	splits := strings.Split(path, ".")
-	if len(splits) > 0 && splits[len(splits)-1] == "gotmpl" {
-		yamlBuf, err := r.tmplFileRenderer.RenderTemplateFileToBuffer(path)
-		if err != nil {
-			return nil, fmt.Errorf("failed to render [%s], because of %v", path, err)
-		}
-		yamlBytes = yamlBuf.Bytes()
-	} else {
-		var err error
-		yamlBytes, err = r.readFile(path)
-		if err != nil {
-			return nil, fmt.Errorf("failed to load [%s]: %v", path, err)
-		}
-	}
-	return yamlBytes, nil
-}

vendor/github.com/Masterminds/semver/.travis.yml

@@ -1,27 +0,0 @@
-language: go
-
-go:
-  - 1.6.x
-  - 1.7.x
-  - 1.8.x
-  - 1.9.x
-  - 1.10.x
-  - tip
-
-# Setting sudo access to false will let Travis CI use containers rather than
-# VMs to run the tests. For more details see:
-# - http://docs.travis-ci.com/user/workers/container-based-infrastructure/
-# - http://docs.travis-ci.com/user/workers/standard-infrastructure/
-sudo: false
-
-script:
-  - make setup
-  - make test
-
-notifications:
-  webhooks:
-    urls:
-      - https://webhooks.gitter.im/e/06e3328629952dabe3e0
-    on_success: change  # options: [always|never|change] default: always
-    on_failure: always  # options: [always|never|change] default: always
-    on_start: never     # options: [always|never|change] default: always

vendor/github.com/Masterminds/semver/CHANGELOG.md

@@ -1,77 +0,0 @@
-# 1.4.1 (2018-04-02)
-
-## Fixed
-- Fixed #64: Fix pre-release precedence issue (thanks @uudashr)
-
-# 1.4.0 (2017-10-04)
-
-## Changed
-- #61: Update NewVersion to parse ints with a 64bit int size (thanks @zknill)
-
-# 1.3.1 (2017-07-10)
-
-## Fixed
-- Fixed #57: number comparisons in prerelease sometimes inaccurate
-
-# 1.3.0 (2017-05-02)
-
-## Added
-- #45: Added json (un)marshaling support (thanks @mh-cbon)
-- Stability marker. See https://masterminds.github.io/stability/
-
-## Fixed
-- #51: Fix handling of single digit tilde constraint (thanks @dgodd)
-
-## Changed
-- #55: The godoc icon moved from png to svg
-
-# 1.2.3 (2017-04-03)
-
-## Fixed
-- #46: Fixed 0.x.x and 0.0.x in constraints being treated as *
-
-# Release 1.2.2 (2016-12-13)
-
-## Fixed
-- #34: Fixed issue where hyphen range was not working with pre-release parsing.
-
-# Release 1.2.1 (2016-11-28)
-
-## Fixed
-- #24: Fixed edge case issue where constraint "> 0" does not handle "0.0.1-alpha"
-  properly.
-
-# Release 1.2.0 (2016-11-04)
-
-## Added
-- #20: Added MustParse function for versions (thanks @adamreese)
-- #15: Added increment methods on versions (thanks @mh-cbon)
-
-## Fixed
-- Issue #21: Per the SemVer spec (section 9) a pre-release is unstable and
-  might not satisfy the intended compatibility. The change here ignores pre-releases
-  on constraint checks (e.g., ~ or ^) when a pre-release is not part of the
-  constraint. For example, `^1.2.3` will ignore pre-releases while
-  `^1.2.3-alpha` will include them.
-
-# Release 1.1.1 (2016-06-30)
-
-## Changed
-- Issue #9: Speed up version comparison performance (thanks @sdboyer)
-- Issue #8: Added benchmarks (thanks @sdboyer)
-- Updated Go Report Card URL to new location
-- Updated Readme to add code snippet formatting (thanks @mh-cbon)
-- Updating tagging to v[SemVer] structure for compatibility with other tools.
-
-# Release 1.1.0 (2016-03-11)
-
-- Issue #2: Implemented validation to provide reasons a versions failed a
-  constraint.
-
-# Release 1.0.1 (2015-12-31)
-
-- Fixed #1: * constraint failing on valid versions.
-
-# Release 1.0.0 (2015-10-20)
-
-- Initial release

vendor/github.com/Masterminds/semver/LICENSE.txt

@@ -1,20 +0,0 @@
-The Masterminds
-Copyright (C) 2014-2015, Matt Butcher and Matt Farina
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.

vendor/github.com/Masterminds/semver/Makefile

@@ -1,36 +0,0 @@
-.PHONY: setup
-setup:
-	go get -u gopkg.in/alecthomas/gometalinter.v1
-	gometalinter.v1 --install
-
-.PHONY: test
-test: validate lint
-	@echo "==> Running tests"
-	go test -v
-
-.PHONY: validate
-validate:
-	@echo "==> Running static validations"
-	@gometalinter.v1 \
-	  --disable-all \
-	  --enable deadcode \
-	  --severity deadcode:error \
-	  --enable gofmt \
-	  --enable gosimple \
-	  --enable ineffassign \
-	  --enable misspell \
-	  --enable vet \
-	  --tests \
-	  --vendor \
-	  --deadline 60s \
-	  ./... || exit_code=1
-
-.PHONY: lint
-lint:
-	@echo "==> Running linters"
-	@gometalinter.v1 \
-	  --disable-all \
-	  --enable golint \
-	  --vendor \
-	  --deadline 60s \
-	  ./... || :

vendor/github.com/Masterminds/semver/README.md

@@ -1,165 +0,0 @@
-# SemVer
-
-The `semver` package provides the ability to work with [Semantic Versions](http://semver.org) in Go. Specifically it provides the ability to:
-
-* Parse semantic versions
-* Sort semantic versions
-* Check if a semantic version fits within a set of constraints
-* Optionally work with a `v` prefix
-
-[![Stability:
-Active](https://masterminds.github.io/stability/active.svg)](https://masterminds.github.io/stability/active.html)
-[![Build Status](https://travis-ci.org/Masterminds/semver.svg)](https://travis-ci.org/Masterminds/semver) [![Build status](https://ci.appveyor.com/api/projects/status/jfk66lib7hb985k8/branch/master?svg=true&passingText=windows%20build%20passing&failingText=windows%20build%20failing)](https://ci.appveyor.com/project/mattfarina/semver/branch/master) [![GoDoc](https://godoc.org/github.com/Masterminds/semver?status.svg)](https://godoc.org/github.com/Masterminds/semver) [![Go Report Card](https://goreportcard.com/badge/github.com/Masterminds/semver)](https://goreportcard.com/report/github.com/Masterminds/semver)
-
-## Parsing Semantic Versions
-
-To parse a semantic version use the `NewVersion` function. For example,
-
-```go
-    v, err := semver.NewVersion("1.2.3-beta.1+build345")
-```
-
-If there is an error the version wasn't parseable. The version object has methods
-to get the parts of the version, compare it to other versions, convert the
-version back into a string, and get the original string. For more details
-please see the [documentation](https://godoc.org/github.com/Masterminds/semver).
-
-## Sorting Semantic Versions
-
-A set of versions can be sorted using the [`sort`](https://golang.org/pkg/sort/)
-package from the standard library. For example,
-
-```go
-    raw := []string{"1.2.3", "1.0", "1.3", "2", "0.4.2",}
-    vs := make([]*semver.Version, len(raw))
-	for i, r := range raw {
-		v, err := semver.NewVersion(r)
-		if err != nil {
-			t.Errorf("Error parsing version: %s", err)
-		}
-
-		vs[i] = v
-	}
-
-	sort.Sort(semver.Collection(vs))
-```
-
-## Checking Version Constraints
-
-Checking a version against version constraints is one of the most featureful
-parts of the package.
-
-```go
-    c, err := semver.NewConstraint(">= 1.2.3")
-    if err != nil {
-        // Handle constraint not being parseable.
-    }
-
-    v, _ := semver.NewVersion("1.3")
-    if err != nil {
-        // Handle version not being parseable.
-    }
-    // Check if the version meets the constraints. The a variable will be true.
-    a := c.Check(v)
-```
-
-## Basic Comparisons
-
-There are two elements to the comparisons. First, a comparison string is a list
-of comma separated and comparisons. These are then separated by || separated or
-comparisons. For example, `">= 1.2, < 3.0.0 || >= 4.2.3"` is looking for a
-comparison that's greater than or equal to 1.2 and less than 3.0.0 or is
-greater than or equal to 4.2.3.
-
-The basic comparisons are:
-
-* `=`: equal (aliased to no operator)
-* `!=`: not equal
-* `>`: greater than
-* `<`: less than
-* `>=`: greater than or equal to
-* `<=`: less than or equal to
-
-_Note, according to the Semantic Version specification pre-releases may not be
-API compliant with their release counterpart. It says,_
-
-> _A pre-release version indicates that the version is unstable and might not satisfy the intended compatibility requirements as denoted by its associated normal version._
-
-_SemVer comparisons without a pre-release value will skip pre-release versions.
-For example, `>1.2.3` will skip pre-releases when looking at a list of values
-while `>1.2.3-alpha.1` will evaluate pre-releases._
-
-## Hyphen Range Comparisons
-
-There are multiple methods to handle ranges and the first is hyphens ranges.
-These look like:
-
-* `1.2 - 1.4.5` which is equivalent to `>= 1.2, <= 1.4.5`
-* `2.3.4 - 4.5` which is equivalent to `>= 2.3.4, <= 4.5`
-
-## Wildcards In Comparisons
-
-The `x`, `X`, and `*` characters can be used as a wildcard character. This works
-for all comparison operators. When used on the `=` operator it falls
-back to the pack level comparison (see tilde below). For example,
-
-* `1.2.x` is equivalent to `>= 1.2.0, < 1.3.0`
-* `>= 1.2.x` is equivalent to `>= 1.2.0`
-* `<= 2.x` is equivalent to `<= 3`
-* `*` is equivalent to `>= 0.0.0`
-
-## Tilde Range Comparisons (Patch)
-
-The tilde (`~`) comparison operator is for patch level ranges when a minor
-version is specified and major level changes when the minor number is missing.
-For example,
-
-* `~1.2.3` is equivalent to `>= 1.2.3, < 1.3.0`
-* `~1` is equivalent to `>= 1, < 2`
-* `~2.3` is equivalent to `>= 2.3, < 2.4`
-* `~1.2.x` is equivalent to `>= 1.2.0, < 1.3.0`
-* `~1.x` is equivalent to `>= 1, < 2`
-
-## Caret Range Comparisons (Major)
-
-The caret (`^`) comparison operator is for major level changes. This is useful
-when comparisons of API versions as a major change is API breaking. For example,
-
-* `^1.2.3` is equivalent to `>= 1.2.3, < 2.0.0`
-* `^1.2.x` is equivalent to `>= 1.2.0, < 2.0.0`
-* `^2.3` is equivalent to `>= 2.3, < 3`
-* `^2.x` is equivalent to `>= 2.0.0, < 3`
-
-# Validation
-
-In addition to testing a version against a constraint, a version can be validated
-against a constraint. When validation fails a slice of errors containing why a
-version didn't meet the constraint is returned. For example,
-
-```go
-    c, err := semver.NewConstraint("<= 1.2.3, >= 1.4")
-    if err != nil {
-        // Handle constraint not being parseable.
-    }
-
-    v, _ := semver.NewVersion("1.3")
-    if err != nil {
-        // Handle version not being parseable.
-    }
-
-    // Validate a version against a constraint.
-    a, msgs := c.Validate(v)
-    // a is false
-    for _, m := range msgs {
-        fmt.Println(m)
-
-        // Loops over the errors which would read
-        // "1.3 is greater than 1.2.3"
-        // "1.3 is less than 1.4"
-    }
-```
-
-# Contribute
-
-If you find an issue or want to contribute please file an [issue](https://github.com/Masterminds/semver/issues)
-or [create a pull request](https://github.com/Masterminds/semver/pulls).

vendor/github.com/Masterminds/semver/appveyor.yml

@@ -1,44 +0,0 @@
-version: build-{build}.{branch}
-
-clone_folder: C:\gopath\src\github.com\Masterminds\semver
-shallow_clone: true
-
-environment:
-  GOPATH: C:\gopath
-
-platform:
-  - x64
-
-install:
-  - go version
-  - go env
-  - go get -u gopkg.in/alecthomas/gometalinter.v1
-  - set PATH=%PATH%;%GOPATH%\bin
-  - gometalinter.v1.exe --install
-
-build_script:
-  - go install -v ./...
-
-test_script:
-  - "gometalinter.v1 \
-    --disable-all \
-    --enable deadcode \
-    --severity deadcode:error \
-    --enable gofmt \
-    --enable gosimple \
-    --enable ineffassign \
-    --enable misspell \
-    --enable vet \
-    --tests \
-    --vendor \
-    --deadline 60s \
-    ./... || exit_code=1"
-  - "gometalinter.v1 \
-    --disable-all \
-    --enable golint \
-    --vendor \
-    --deadline 60s \
-    ./... || :"
-  - go test -v
-
-deploy: off

vendor/github.com/Masterminds/semver/collection.go

@@ -1,24 +0,0 @@
-package semver
-
-// Collection is a collection of Version instances and implements the sort
-// interface. See the sort package for more details.
-// https://golang.org/pkg/sort/
-type Collection []*Version
-
-// Len returns the length of a collection. The number of Version instances
-// on the slice.
-func (c Collection) Len() int {
-	return len(c)
-}
-
-// Less is needed for the sort interface to compare two Version objects on the
-// slice. If checks if one is less than the other.
-func (c Collection) Less(i, j int) bool {
-	return c[i].LessThan(c[j])
-}
-
-// Swap is needed for the sort interface to replace the Version objects
-// at two different positions in the slice.
-func (c Collection) Swap(i, j int) {
-	c[i], c[j] = c[j], c[i]
-}

vendor/github.com/Masterminds/semver/constraints.go

@@ -1,426 +0,0 @@
-package semver
-
-import (
-	"errors"
-	"fmt"
-	"regexp"
-	"strings"
-)
-
-// Constraints is one or more constraint that a semantic version can be
-// checked against.
-type Constraints struct {
-	constraints [][]*constraint
-}
-
-// NewConstraint returns a Constraints instance that a Version instance can
-// be checked against. If there is a parse error it will be returned.
-func NewConstraint(c string) (*Constraints, error) {
-
-	// Rewrite - ranges into a comparison operation.
-	c = rewriteRange(c)
-
-	ors := strings.Split(c, "||")
-	or := make([][]*constraint, len(ors))
-	for k, v := range ors {
-		cs := strings.Split(v, ",")
-		result := make([]*constraint, len(cs))
-		for i, s := range cs {
-			pc, err := parseConstraint(s)
-			if err != nil {
-				return nil, err
-			}
-
-			result[i] = pc
-		}
-		or[k] = result
-	}
-
-	o := &Constraints{constraints: or}
-	return o, nil
-}
-
-// Check tests if a version satisfies the constraints.
-func (cs Constraints) Check(v *Version) bool {
-	// loop over the ORs and check the inner ANDs
-	for _, o := range cs.constraints {
-		joy := true
-		for _, c := range o {
-			if !c.check(v) {
-				joy = false
-				break
-			}
-		}
-
-		if joy {
-			return true
-		}
-	}
-
-	return false
-}
-
-// Validate checks if a version satisfies a constraint. If not a slice of
-// reasons for the failure are returned in addition to a bool.
-func (cs Constraints) Validate(v *Version) (bool, []error) {
-	// loop over the ORs and check the inner ANDs
-	var e []error
-	for _, o := range cs.constraints {
-		joy := true
-		for _, c := range o {
-			if !c.check(v) {
-				em := fmt.Errorf(c.msg, v, c.orig)
-				e = append(e, em)
-				joy = false
-			}
-		}
-
-		if joy {
-			return true, []error{}
-		}
-	}
-
-	return false, e
-}
-
-var constraintOps map[string]cfunc
-var constraintMsg map[string]string
-var constraintRegex *regexp.Regexp
-
-func init() {
-	constraintOps = map[string]cfunc{
-		"":   constraintTildeOrEqual,
-		"=":  constraintTildeOrEqual,
-		"!=": constraintNotEqual,
-		">":  constraintGreaterThan,
-		"<":  constraintLessThan,
-		">=": constraintGreaterThanEqual,
-		"=>": constraintGreaterThanEqual,
-		"<=": constraintLessThanEqual,
-		"=<": constraintLessThanEqual,
-		"~":  constraintTilde,
-		"~>": constraintTilde,
-		"^":  constraintCaret,
-	}
-
-	constraintMsg = map[string]string{
-		"":   "%s is not equal to %s",
-		"=":  "%s is not equal to %s",
-		"!=": "%s is equal to %s",
-		">":  "%s is less than or equal to %s",
-		"<":  "%s is greater than or equal to %s",
-		">=": "%s is less than %s",
-		"=>": "%s is less than %s",
-		"<=": "%s is greater than %s",
-		"=<": "%s is greater than %s",
-		"~":  "%s does not have same major and minor version as %s",
-		"~>": "%s does not have same major and minor version as %s",
-		"^":  "%s does not have same major version as %s",
-	}
-
-	ops := make([]string, 0, len(constraintOps))
-	for k := range constraintOps {
-		ops = append(ops, regexp.QuoteMeta(k))
-	}
-
-	constraintRegex = regexp.MustCompile(fmt.Sprintf(
-		`^\s*(%s)\s*(%s)\s*$`,
-		strings.Join(ops, "|"),
-		cvRegex))
-
-	constraintRangeRegex = regexp.MustCompile(fmt.Sprintf(
-		`\s*(%s)\s+-\s+(%s)\s*`,
-		cvRegex, cvRegex))
-}
-
-// An individual constraint
-type constraint struct {
-	// The callback function for the restraint. It performs the logic for
-	// the constraint.
-	function cfunc
-
-	msg string
-
-	// The version used in the constraint check. For example, if a constraint
-	// is '<= 2.0.0' the con a version instance representing 2.0.0.
-	con *Version
-
-	// The original parsed version (e.g., 4.x from != 4.x)
-	orig string
-
-	// When an x is used as part of the version (e.g., 1.x)
-	minorDirty bool
-	dirty      bool
-	patchDirty bool
-}
-
-// Check if a version meets the constraint
-func (c *constraint) check(v *Version) bool {
-	return c.function(v, c)
-}
-
-type cfunc func(v *Version, c *constraint) bool
-
-func parseConstraint(c string) (*constraint, error) {
-	m := constraintRegex.FindStringSubmatch(c)
-	if m == nil {
-		return nil, fmt.Errorf("improper constraint: %s", c)
-	}
-
-	ver := m[2]
-	orig := ver
-	minorDirty := false
-	patchDirty := false
-	dirty := false
-	if isX(m[3]) {
-		ver = "0.0.0"
-		dirty = true
-	} else if isX(strings.TrimPrefix(m[4], ".")) || m[4] == "" {
-		minorDirty = true
-		dirty = true
-		ver = fmt.Sprintf("%s.0.0%s", m[3], m[6])
-	} else if isX(strings.TrimPrefix(m[5], ".")) {
-		dirty = true
-		patchDirty = true
-		ver = fmt.Sprintf("%s%s.0%s", m[3], m[4], m[6])
-	}
-
-	con, err := NewVersion(ver)
-	if err != nil {
-
-		// The constraintRegex should catch any regex parsing errors. So,
-		// we should never get here.
-		return nil, errors.New("constraint Parser Error")
-	}
-
-	cs := &constraint{
-		function:   constraintOps[m[1]],
-		msg:        constraintMsg[m[1]],
-		con:        con,
-		orig:       orig,
-		minorDirty: minorDirty,
-		patchDirty: patchDirty,
-		dirty:      dirty,
-	}
-	return cs, nil
-}
-
-// Constraint functions
-func constraintNotEqual(v *Version, c *constraint) bool {
-	if c.dirty {
-
-		// If there is a pre-release on the version but the constraint isn't looking
-		// for them assume that pre-releases are not compatible. See issue 21 for
-		// more details.
-		if v.Prerelease() != "" && c.con.Prerelease() == "" {
-			return false
-		}
-
-		if c.con.Major() != v.Major() {
-			return true
-		}
-		if c.con.Minor() != v.Minor() && !c.minorDirty {
-			return true
-		} else if c.minorDirty {
-			return false
-		}
-
-		return false
-	}
-
-	return !v.Equal(c.con)
-}
-
-func constraintGreaterThan(v *Version, c *constraint) bool {
-
-	// An edge case the constraint is 0.0.0 and the version is 0.0.0-someprerelease
-	// exists. This that case.
-	if !isNonZero(c.con) && isNonZero(v) {
-		return true
-	}
-
-	// If there is a pre-release on the version but the constraint isn't looking
-	// for them assume that pre-releases are not compatible. See issue 21 for
-	// more details.
-	if v.Prerelease() != "" && c.con.Prerelease() == "" {
-		return false
-	}
-
-	return v.Compare(c.con) == 1
-}
-
-func constraintLessThan(v *Version, c *constraint) bool {
-	// If there is a pre-release on the version but the constraint isn't looking
-	// for them assume that pre-releases are not compatible. See issue 21 for
-	// more details.
-	if v.Prerelease() != "" && c.con.Prerelease() == "" {
-		return false
-	}
-
-	if !c.dirty {
-		return v.Compare(c.con) < 0
-	}
-
-	if v.Major() > c.con.Major() {
-		return false
-	} else if v.Minor() > c.con.Minor() && !c.minorDirty {
-		return false
-	}
-
-	return true
-}
-
-func constraintGreaterThanEqual(v *Version, c *constraint) bool {
-	// An edge case the constraint is 0.0.0 and the version is 0.0.0-someprerelease
-	// exists. This that case.
-	if !isNonZero(c.con) && isNonZero(v) {
-		return true
-	}
-
-	// If there is a pre-release on the version but the constraint isn't looking
-	// for them assume that pre-releases are not compatible. See issue 21 for
-	// more details.
-	if v.Prerelease() != "" && c.con.Prerelease() == "" {
-		return false
-	}
-
-	return v.Compare(c.con) >= 0
-}
-
-func constraintLessThanEqual(v *Version, c *constraint) bool {
-	// If there is a pre-release on the version but the constraint isn't looking
-	// for them assume that pre-releases are not compatible. See issue 21 for
-	// more details.
-	if v.Prerelease() != "" && c.con.Prerelease() == "" {
-		return false
-	}
-
-	if !c.dirty {
-		return v.Compare(c.con) <= 0
-	}
-
-	if v.Major() > c.con.Major() {
-		return false
-	} else if v.Minor() > c.con.Minor() && !c.minorDirty {
-		return false
-	}
-
-	return true
-}
-
-// ~*, ~>* --> >= 0.0.0 (any)
-// ~2, ~2.x, ~2.x.x, ~>2, ~>2.x ~>2.x.x --> >=2.0.0, <3.0.0
-// ~2.0, ~2.0.x, ~>2.0, ~>2.0.x --> >=2.0.0, <2.1.0
-// ~1.2, ~1.2.x, ~>1.2, ~>1.2.x --> >=1.2.0, <1.3.0
-// ~1.2.3, ~>1.2.3 --> >=1.2.3, <1.3.0
-// ~1.2.0, ~>1.2.0 --> >=1.2.0, <1.3.0
-func constraintTilde(v *Version, c *constraint) bool {
-	// If there is a pre-release on the version but the constraint isn't looking
-	// for them assume that pre-releases are not compatible. See issue 21 for
-	// more details.
-	if v.Prerelease() != "" && c.con.Prerelease() == "" {
-		return false
-	}
-
-	if v.LessThan(c.con) {
-		return false
-	}
-
-	// ~0.0.0 is a special case where all constraints are accepted. It's
-	// equivalent to >= 0.0.0.
-	if c.con.Major() == 0 && c.con.Minor() == 0 && c.con.Patch() == 0 &&
-		!c.minorDirty && !c.patchDirty {
-		return true
-	}
-
-	if v.Major() != c.con.Major() {
-		return false
-	}
-
-	if v.Minor() != c.con.Minor() && !c.minorDirty {
-		return false
-	}
-
-	return true
-}
-
-// When there is a .x (dirty) status it automatically opts in to ~. Otherwise
-// it's a straight =
-func constraintTildeOrEqual(v *Version, c *constraint) bool {
-	// If there is a pre-release on the version but the constraint isn't looking
-	// for them assume that pre-releases are not compatible. See issue 21 for
-	// more details.
-	if v.Prerelease() != "" && c.con.Prerelease() == "" {
-		return false
-	}
-
-	if c.dirty {
-		c.msg = constraintMsg["~"]
-		return constraintTilde(v, c)
-	}
-
-	return v.Equal(c.con)
-}
-
-// ^* --> (any)
-// ^2, ^2.x, ^2.x.x --> >=2.0.0, <3.0.0
-// ^2.0, ^2.0.x --> >=2.0.0, <3.0.0
-// ^1.2, ^1.2.x --> >=1.2.0, <2.0.0
-// ^1.2.3 --> >=1.2.3, <2.0.0
-// ^1.2.0 --> >=1.2.0, <2.0.0
-func constraintCaret(v *Version, c *constraint) bool {
-	// If there is a pre-release on the version but the constraint isn't looking
-	// for them assume that pre-releases are not compatible. See issue 21 for
-	// more details.
-	if v.Prerelease() != "" && c.con.Prerelease() == "" {
-		return false
-	}
-
-	if v.LessThan(c.con) {
-		return false
-	}
-
-	if v.Major() != c.con.Major() {
-		return false
-	}
-
-	return true
-}
-
-var constraintRangeRegex *regexp.Regexp
-
-const cvRegex string = `v?([0-9|x|X|\*]+)(\.[0-9|x|X|\*]+)?(\.[0-9|x|X|\*]+)?` +
-	`(-([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` +
-	`(\+([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?`
-
-func isX(x string) bool {
-	switch x {
-	case "x", "*", "X":
-		return true
-	default:
-		return false
-	}
-}
-
-func rewriteRange(i string) string {
-	m := constraintRangeRegex.FindAllStringSubmatch(i, -1)
-	if m == nil {
-		return i
-	}
-	o := i
-	for _, v := range m {
-		t := fmt.Sprintf(">= %s, <= %s", v[1], v[11])
-		o = strings.Replace(o, v[0], t, 1)
-	}
-
-	return o
-}
-
-// Detect if a version is not zero (0.0.0)
-func isNonZero(v *Version) bool {
-	if v.Major() != 0 || v.Minor() != 0 || v.Patch() != 0 || v.Prerelease() != "" {
-		return true
-	}
-
-	return false
-}

vendor/github.com/Masterminds/semver/doc.go

@@ -1,115 +0,0 @@
-/*
-Package semver provides the ability to work with Semantic Versions (http://semver.org) in Go.
-
-Specifically it provides the ability to:
-
-    * Parse semantic versions
-    * Sort semantic versions
-    * Check if a semantic version fits within a set of constraints
-    * Optionally work with a `v` prefix
-
-Parsing Semantic Versions
-
-To parse a semantic version use the `NewVersion` function. For example,
-
-    v, err := semver.NewVersion("1.2.3-beta.1+build345")
-
-If there is an error the version wasn't parseable. The version object has methods
-to get the parts of the version, compare it to other versions, convert the
-version back into a string, and get the original string. For more details
-please see the documentation at https://godoc.org/github.com/Masterminds/semver.
-
-Sorting Semantic Versions
-
-A set of versions can be sorted using the `sort` package from the standard library.
-For example,
-
-    raw := []string{"1.2.3", "1.0", "1.3", "2", "0.4.2",}
-    vs := make([]*semver.Version, len(raw))
-	for i, r := range raw {
-		v, err := semver.NewVersion(r)
-		if err != nil {
-			t.Errorf("Error parsing version: %s", err)
-		}
-
-		vs[i] = v
-	}
-
-	sort.Sort(semver.Collection(vs))
-
-Checking Version Constraints
-
-Checking a version against version constraints is one of the most featureful
-parts of the package.
-
-    c, err := semver.NewConstraint(">= 1.2.3")
-    if err != nil {
-        // Handle constraint not being parseable.
-    }
-
-    v, _ := semver.NewVersion("1.3")
-    if err != nil {
-        // Handle version not being parseable.
-    }
-    // Check if the version meets the constraints. The a variable will be true.
-    a := c.Check(v)
-
-Basic Comparisons
-
-There are two elements to the comparisons. First, a comparison string is a list
-of comma separated and comparisons. These are then separated by || separated or
-comparisons. For example, `">= 1.2, < 3.0.0 || >= 4.2.3"` is looking for a
-comparison that's greater than or equal to 1.2 and less than 3.0.0 or is
-greater than or equal to 4.2.3.
-
-The basic comparisons are:
-
-    * `=`: equal (aliased to no operator)
-    * `!=`: not equal
-    * `>`: greater than
-    * `<`: less than
-    * `>=`: greater than or equal to
-    * `<=`: less than or equal to
-
-Hyphen Range Comparisons
-
-There are multiple methods to handle ranges and the first is hyphens ranges.
-These look like:
-
-    * `1.2 - 1.4.5` which is equivalent to `>= 1.2, <= 1.4.5`
-    * `2.3.4 - 4.5` which is equivalent to `>= 2.3.4, <= 4.5`
-
-Wildcards In Comparisons
-
-The `x`, `X`, and `*` characters can be used as a wildcard character. This works
-for all comparison operators. When used on the `=` operator it falls
-back to the pack level comparison (see tilde below). For example,
-
-    * `1.2.x` is equivalent to `>= 1.2.0, < 1.3.0`
-    * `>= 1.2.x` is equivalent to `>= 1.2.0`
-    * `<= 2.x` is equivalent to `<= 3`
-    * `*` is equivalent to `>= 0.0.0`
-
-Tilde Range Comparisons (Patch)
-
-The tilde (`~`) comparison operator is for patch level ranges when a minor
-version is specified and major level changes when the minor number is missing.
-For example,
-
-    * `~1.2.3` is equivalent to `>= 1.2.3, < 1.3.0`
-    * `~1` is equivalent to `>= 1, < 2`
-    * `~2.3` is equivalent to `>= 2.3, < 2.4`
-    * `~1.2.x` is equivalent to `>= 1.2.0, < 1.3.0`
-    * `~1.x` is equivalent to `>= 1, < 2`
-
-Caret Range Comparisons (Major)
-
-The caret (`^`) comparison operator is for major level changes. This is useful
-when comparisons of API versions as a major change is API breaking. For example,
-
-    * `^1.2.3` is equivalent to `>= 1.2.3, < 2.0.0`
-    * `^1.2.x` is equivalent to `>= 1.2.0, < 2.0.0`
-    * `^2.3` is equivalent to `>= 2.3, < 3`
-    * `^2.x` is equivalent to `>= 2.0.0, < 3`
-*/
-package semver

vendor/github.com/Masterminds/semver/version.go

@@ -1,421 +0,0 @@
-package semver
-
-import (
-	"bytes"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"regexp"
-	"strconv"
-	"strings"
-)
-
-// The compiled version of the regex created at init() is cached here so it
-// only needs to be created once.
-var versionRegex *regexp.Regexp
-var validPrereleaseRegex *regexp.Regexp
-
-var (
-	// ErrInvalidSemVer is returned a version is found to be invalid when
-	// being parsed.
-	ErrInvalidSemVer = errors.New("Invalid Semantic Version")
-
-	// ErrInvalidMetadata is returned when the metadata is an invalid format
-	ErrInvalidMetadata = errors.New("Invalid Metadata string")
-
-	// ErrInvalidPrerelease is returned when the pre-release is an invalid format
-	ErrInvalidPrerelease = errors.New("Invalid Prerelease string")
-)
-
-// SemVerRegex is the regular expression used to parse a semantic version.
-const SemVerRegex string = `v?([0-9]+)(\.[0-9]+)?(\.[0-9]+)?` +
-	`(-([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` +
-	`(\+([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?`
-
-// ValidPrerelease is the regular expression which validates
-// both prerelease and metadata values.
-const ValidPrerelease string = `^([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*)`
-
-// Version represents a single semantic version.
-type Version struct {
-	major, minor, patch int64
-	pre                 string
-	metadata            string
-	original            string
-}
-
-func init() {
-	versionRegex = regexp.MustCompile("^" + SemVerRegex + "$")
-	validPrereleaseRegex = regexp.MustCompile(ValidPrerelease)
-}
-
-// NewVersion parses a given version and returns an instance of Version or
-// an error if unable to parse the version.
-func NewVersion(v string) (*Version, error) {
-	m := versionRegex.FindStringSubmatch(v)
-	if m == nil {
-		return nil, ErrInvalidSemVer
-	}
-
-	sv := &Version{
-		metadata: m[8],
-		pre:      m[5],
-		original: v,
-	}
-
-	var temp int64
-	temp, err := strconv.ParseInt(m[1], 10, 64)
-	if err != nil {
-		return nil, fmt.Errorf("Error parsing version segment: %s", err)
-	}
-	sv.major = temp
-
-	if m[2] != "" {
-		temp, err = strconv.ParseInt(strings.TrimPrefix(m[2], "."), 10, 64)
-		if err != nil {
-			return nil, fmt.Errorf("Error parsing version segment: %s", err)
-		}
-		sv.minor = temp
-	} else {
-		sv.minor = 0
-	}
-
-	if m[3] != "" {
-		temp, err = strconv.ParseInt(strings.TrimPrefix(m[3], "."), 10, 64)
-		if err != nil {
-			return nil, fmt.Errorf("Error parsing version segment: %s", err)
-		}
-		sv.patch = temp
-	} else {
-		sv.patch = 0
-	}
-
-	return sv, nil
-}
-
-// MustParse parses a given version and panics on error.
-func MustParse(v string) *Version {
-	sv, err := NewVersion(v)
-	if err != nil {
-		panic(err)
-	}
-	return sv
-}
-
-// String converts a Version object to a string.
-// Note, if the original version contained a leading v this version will not.
-// See the Original() method to retrieve the original value. Semantic Versions
-// don't contain a leading v per the spec. Instead it's optional on
-// impelementation.
-func (v *Version) String() string {
-	var buf bytes.Buffer
-
-	fmt.Fprintf(&buf, "%d.%d.%d", v.major, v.minor, v.patch)
-	if v.pre != "" {
-		fmt.Fprintf(&buf, "-%s", v.pre)
-	}
-	if v.metadata != "" {
-		fmt.Fprintf(&buf, "+%s", v.metadata)
-	}
-
-	return buf.String()
-}
-
-// Original returns the original value passed in to be parsed.
-func (v *Version) Original() string {
-	return v.original
-}
-
-// Major returns the major version.
-func (v *Version) Major() int64 {
-	return v.major
-}
-
-// Minor returns the minor version.
-func (v *Version) Minor() int64 {
-	return v.minor
-}
-
-// Patch returns the patch version.
-func (v *Version) Patch() int64 {
-	return v.patch
-}
-
-// Prerelease returns the pre-release version.
-func (v *Version) Prerelease() string {
-	return v.pre
-}
-
-// Metadata returns the metadata on the version.
-func (v *Version) Metadata() string {
-	return v.metadata
-}
-
-// originalVPrefix returns the original 'v' prefix if any.
-func (v *Version) originalVPrefix() string {
-
-	// Note, only lowercase v is supported as a prefix by the parser.
-	if v.original != "" && v.original[:1] == "v" {
-		return v.original[:1]
-	}
-	return ""
-}
-
-// IncPatch produces the next patch version.
-// If the current version does not have prerelease/metadata information,
-// it unsets metadata and prerelease values, increments patch number.
-// If the current version has any of prerelease or metadata information,
-// it unsets both values and keeps curent patch value
-func (v Version) IncPatch() Version {
-	vNext := v
-	// according to http://semver.org/#spec-item-9
-	// Pre-release versions have a lower precedence than the associated normal version.
-	// according to http://semver.org/#spec-item-10
-	// Build metadata SHOULD be ignored when determining version precedence.
-	if v.pre != "" {
-		vNext.metadata = ""
-		vNext.pre = ""
-	} else {
-		vNext.metadata = ""
-		vNext.pre = ""
-		vNext.patch = v.patch + 1
-	}
-	vNext.original = v.originalVPrefix() + "" + vNext.String()
-	return vNext
-}
-
-// IncMinor produces the next minor version.
-// Sets patch to 0.
-// Increments minor number.
-// Unsets metadata.
-// Unsets prerelease status.
-func (v Version) IncMinor() Version {
-	vNext := v
-	vNext.metadata = ""
-	vNext.pre = ""
-	vNext.patch = 0
-	vNext.minor = v.minor + 1
-	vNext.original = v.originalVPrefix() + "" + vNext.String()
-	return vNext
-}
-
-// IncMajor produces the next major version.
-// Sets patch to 0.
-// Sets minor to 0.
-// Increments major number.
-// Unsets metadata.
-// Unsets prerelease status.
-func (v Version) IncMajor() Version {
-	vNext := v
-	vNext.metadata = ""
-	vNext.pre = ""
-	vNext.patch = 0
-	vNext.minor = 0
-	vNext.major = v.major + 1
-	vNext.original = v.originalVPrefix() + "" + vNext.String()
-	return vNext
-}
-
-// SetPrerelease defines the prerelease value.
-// Value must not include the required 'hypen' prefix.
-func (v Version) SetPrerelease(prerelease string) (Version, error) {
-	vNext := v
-	if len(prerelease) > 0 && !validPrereleaseRegex.MatchString(prerelease) {
-		return vNext, ErrInvalidPrerelease
-	}
-	vNext.pre = prerelease
-	vNext.original = v.originalVPrefix() + "" + vNext.String()
-	return vNext, nil
-}
-
-// SetMetadata defines metadata value.
-// Value must not include the required 'plus' prefix.
-func (v Version) SetMetadata(metadata string) (Version, error) {
-	vNext := v
-	if len(metadata) > 0 && !validPrereleaseRegex.MatchString(metadata) {
-		return vNext, ErrInvalidMetadata
-	}
-	vNext.metadata = metadata
-	vNext.original = v.originalVPrefix() + "" + vNext.String()
-	return vNext, nil
-}
-
-// LessThan tests if one version is less than another one.
-func (v *Version) LessThan(o *Version) bool {
-	return v.Compare(o) < 0
-}
-
-// GreaterThan tests if one version is greater than another one.
-func (v *Version) GreaterThan(o *Version) bool {
-	return v.Compare(o) > 0
-}
-
-// Equal tests if two versions are equal to each other.
-// Note, versions can be equal with different metadata since metadata
-// is not considered part of the comparable version.
-func (v *Version) Equal(o *Version) bool {
-	return v.Compare(o) == 0
-}
-
-// Compare compares this version to another one. It returns -1, 0, or 1 if
-// the version smaller, equal, or larger than the other version.
-//
-// Versions are compared by X.Y.Z. Build metadata is ignored. Prerelease is
-// lower than the version without a prerelease.
-func (v *Version) Compare(o *Version) int {
-	// Compare the major, minor, and patch version for differences. If a
-	// difference is found return the comparison.
-	if d := compareSegment(v.Major(), o.Major()); d != 0 {
-		return d
-	}
-	if d := compareSegment(v.Minor(), o.Minor()); d != 0 {
-		return d
-	}
-	if d := compareSegment(v.Patch(), o.Patch()); d != 0 {
-		return d
-	}
-
-	// At this point the major, minor, and patch versions are the same.
-	ps := v.pre
-	po := o.Prerelease()
-
-	if ps == "" && po == "" {
-		return 0
-	}
-	if ps == "" {
-		return 1
-	}
-	if po == "" {
-		return -1
-	}
-
-	return comparePrerelease(ps, po)
-}
-
-// UnmarshalJSON implements JSON.Unmarshaler interface.
-func (v *Version) UnmarshalJSON(b []byte) error {
-	var s string
-	if err := json.Unmarshal(b, &s); err != nil {
-		return err
-	}
-	temp, err := NewVersion(s)
-	if err != nil {
-		return err
-	}
-	v.major = temp.major
-	v.minor = temp.minor
-	v.patch = temp.patch
-	v.pre = temp.pre
-	v.metadata = temp.metadata
-	v.original = temp.original
-	temp = nil
-	return nil
-}
-
-// MarshalJSON implements JSON.Marshaler interface.
-func (v *Version) MarshalJSON() ([]byte, error) {
-	return json.Marshal(v.String())
-}
-
-func compareSegment(v, o int64) int {
-	if v < o {
-		return -1
-	}
-	if v > o {
-		return 1
-	}
-
-	return 0
-}
-
-func comparePrerelease(v, o string) int {
-
-	// split the prelease versions by their part. The separator, per the spec,
-	// is a .
-	sparts := strings.Split(v, ".")
-	oparts := strings.Split(o, ".")
-
-	// Find the longer length of the parts to know how many loop iterations to
-	// go through.
-	slen := len(sparts)
-	olen := len(oparts)
-
-	l := slen
-	if olen > slen {
-		l = olen
-	}
-
-	// Iterate over each part of the prereleases to compare the differences.
-	for i := 0; i < l; i++ {
-		// Since the lentgh of the parts can be different we need to create
-		// a placeholder. This is to avoid out of bounds issues.
-		stemp := ""
-		if i < slen {
-			stemp = sparts[i]
-		}
-
-		otemp := ""
-		if i < olen {
-			otemp = oparts[i]
-		}
-
-		d := comparePrePart(stemp, otemp)
-		if d != 0 {
-			return d
-		}
-	}
-
-	// Reaching here means two versions are of equal value but have different
-	// metadata (the part following a +). They are not identical in string form
-	// but the version comparison finds them to be equal.
-	return 0
-}
-
-func comparePrePart(s, o string) int {
-	// Fastpath if they are equal
-	if s == o {
-		return 0
-	}
-
-	// When s or o are empty we can use the other in an attempt to determine
-	// the response.
-	if s == "" {
-		if o != "" {
-			return -1
-		}
-		return 1
-	}
-
-	if o == "" {
-		if s != "" {
-			return 1
-		}
-		return -1
-	}
-
-	// When comparing strings "99" is greater than "103". To handle
-	// cases like this we need to detect numbers and compare them.
-
-	oi, n1 := strconv.ParseInt(o, 10, 64)
-	si, n2 := strconv.ParseInt(s, 10, 64)
-
-	// The case where both are strings compare the strings
-	if n1 != nil && n2 != nil {
-		if s > o {
-			return 1
-		}
-		return -1
-	} else if n1 != nil {
-		// o is a string and s is a number
-		return -1
-	} else if n2 != nil {
-		// s is a string and o is a number
-		return 1
-	}
-	// Both are numbers
-	if si > oi {
-		return 1
-	}
-	return -1
-
-}

vendor/github.com/Masterminds/sprig/.gitignore

@@ -1,2 +0,0 @@
-vendor/
-/.glide

vendor/github.com/Masterminds/sprig/.travis.yml

@@ -1,23 +0,0 @@
-language: go
-
-go:
-  - 1.9.x
-  - 1.10.x
-  - tip
-
-# Setting sudo access to false will let Travis CI use containers rather than
-# VMs to run the tests. For more details see:
-# - http://docs.travis-ci.com/user/workers/container-based-infrastructure/
-# - http://docs.travis-ci.com/user/workers/standard-infrastructure/
-sudo: false
-
-script:
-  - make setup test
-
-notifications:
-  webhooks:
-    urls:
-      - https://webhooks.gitter.im/e/06e3328629952dabe3e0
-    on_success: change  # options: [always|never|change] default: always
-    on_failure: always  # options: [always|never|change] default: always
-    on_start: never     # options: [always|never|change] default: always

vendor/github.com/Masterminds/sprig/CHANGELOG.md

@@ -1,153 +0,0 @@
-# Changelog
-
-## Release 2.15.0 (2018-04-02)
-
-### Added
-
-- #68 and #69: Add json helpers to docs (thanks @arunvelsriram)
-- #66: Add ternary function (thanks @binoculars)
-- #67: Allow keys function to take multiple dicts (thanks @binoculars)
-- #89: Added sha1sum to crypto function (thanks @benkeil)
-- #81: Allow customizing Root CA that used by genSignedCert (thanks @chenzhiwei)
-- #92: Add travis testing for go 1.10
-- #93: Adding appveyor config for windows testing
-
-### Changed
-
-- #90: Updating to more recent dependencies
-- #73: replace satori/go.uuid with google/uuid (thanks @petterw)
-
-### Fixed
-
-- #76: Fixed documentation typos (thanks @Thiht)
-- Fixed rounding issue on the `ago` function. Note, the removes support for Go 1.8 and older
-
-## Release 2.14.1 (2017-12-01)
-
-### Fixed
-
-- #60: Fix typo in function name documentation (thanks @neil-ca-moore)
-- #61: Removing line with {{ due to blocking github pages genertion
-- #64: Update the list functions to handle int, string, and other slices for compatibility
-
-## Release 2.14.0 (2017-10-06)
-
-This new version of Sprig adds a set of functions for generating and working with SSL certificates.
-
-- `genCA` generates an SSL Certificate Authority
-- `genSelfSignedCert` generates an SSL self-signed certificate
-- `genSignedCert` generates an SSL certificate and key based on a given CA
-
-## Release 2.13.0 (2017-09-18)
-
-This release adds new functions, including:
-
-- `regexMatch`, `regexFindAll`, `regexFind`, `regexReplaceAll`, `regexReplaceAllLiteral`, and `regexSplit` to work with regular expressions
-- `floor`, `ceil`, and `round` math functions
-- `toDate` converts a string to a date
-- `nindent` is just like `indent` but also prepends a new line
-- `ago` returns the time from `time.Now`
-
-### Added
-
-- #40: Added basic regex functionality (thanks @alanquillin)
-- #41: Added ceil floor and round functions (thanks @alanquillin)
-- #48: Added toDate function (thanks @andreynering)
-- #50: Added nindent function (thanks @binoculars)
-- #46: Added ago function (thanks @slayer)
-
-### Changed
-
-- #51: Updated godocs to include new string functions (thanks @curtisallen)
-- #49: Added ability to merge multiple dicts (thanks @binoculars)
-
-## Release 2.12.0 (2017-05-17)
-
-- `snakecase`, `camelcase`, and `shuffle` are three new string functions
-- `fail` allows you to bail out of a template render when conditions are not met
-
-## Release 2.11.0 (2017-05-02)
-
-- Added `toJson` and `toPrettyJson`
-- Added `merge`
-- Refactored documentation
-
-## Release 2.10.0 (2017-03-15)
-
-- Added `semver` and `semverCompare` for Semantic Versions
-- `list` replaces `tuple`
-- Fixed issue with `join`
-- Added `first`, `last`, `intial`, `rest`, `prepend`, `append`, `toString`, `toStrings`, `sortAlpha`, `reverse`, `coalesce`, `pluck`, `pick`, `compact`, `keys`, `omit`, `uniq`, `has`, `without`
-
-## Release 2.9.0 (2017-02-23)
-
-- Added `splitList` to split a list
-- Added crypto functions of `genPrivateKey` and `derivePassword`
-
-## Release 2.8.0 (2016-12-21)
-
-- Added access to several path functions (`base`, `dir`, `clean`, `ext`, and `abs`)
-- Added functions for _mutating_ dictionaries (`set`, `unset`, `hasKey`)
-
-## Release 2.7.0 (2016-12-01)
-
-- Added `sha256sum` to generate a hash of an input
-- Added functions to convert a numeric or string to `int`, `int64`, `float64`
-
-## Release 2.6.0 (2016-10-03)
-
-- Added a `uuidv4` template function for generating UUIDs inside of a template.
-
-## Release 2.5.0 (2016-08-19)
-
-- New `trimSuffix`, `trimPrefix`, `hasSuffix`, and `hasPrefix` functions
-- New aliases have been added for a few functions that didn't follow the naming conventions (`trimAll` and `abbrevBoth`)
-- `trimall` and `abbrevboth` (notice the case) are deprecated and will be removed in 3.0.0
-
-## Release 2.4.0 (2016-08-16)
-
-- Adds two functions: `until` and `untilStep`
-
-## Release 2.3.0 (2016-06-21)
-
-- cat: Concatenate strings with whitespace separators.
-- replace: Replace parts of a string: `replace " " "-" "Me First"` renders "Me-First"
-- plural: Format plurals: `len "foo" | plural "one foo" "many foos"` renders "many foos"
-- indent: Indent blocks of text in a way that is sensitive to "\n" characters.
-
-## Release 2.2.0 (2016-04-21)
-
-- Added a `genPrivateKey` function (Thanks @bacongobbler)
-
-## Release 2.1.0 (2016-03-30)
-
-- `default` now prints the default value when it does not receive a value down the pipeline. It is much safer now to do `{{.Foo | default "bar"}}`.
-- Added accessors for "hermetic" functions. These return only functions that, when given the same input, produce the same output.
-
-## Release 2.0.0 (2016-03-29)
-
-Because we switched from `int` to `int64` as the return value for all integer math functions, the library's major version number has been incremented.
-
-- `min` complements `max` (formerly `biggest`)
-- `empty` indicates that a value is the empty value for its type
-- `tuple` creates a tuple inside of a template: `{{$t := tuple "a", "b" "c"}}`
-- `dict` creates a dictionary inside of a template `{{$d := dict "key1" "val1" "key2" "val2"}}` 
-- Date formatters have been added for HTML dates (as used in `date` input fields)
-- Integer math functions can convert from a number of types, including `string` (via `strconv.ParseInt`).
-
-## Release 1.2.0 (2016-02-01)
-
-- Added quote and squote
-- Added b32enc and b32dec
-- add now takes varargs
-- biggest now takes varargs
-
-## Release 1.1.0 (2015-12-29)
-
-- Added #4: Added contains function. strings.Contains, but with the arguments
-  switched to simplify common pipelines. (thanks krancour)
-- Added Travis-CI testing support
-
-## Release 1.0.0 (2015-12-23)
-
-- Initial release

vendor/github.com/Masterminds/sprig/LICENSE.txt

@@ -1,20 +0,0 @@
-Sprig
-Copyright (C) 2013 Masterminds
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.

vendor/github.com/Masterminds/sprig/Makefile

@@ -1,13 +0,0 @@
-
-HAS_GLIDE := $(shell command -v glide;)
-
-.PHONY: test
-test:
-	go test -v .
-
-.PHONY: setup
-setup:
-ifndef HAS_GLIDE
-	go get -u github.com/Masterminds/glide
-endif
-	glide install

vendor/github.com/Masterminds/sprig/README.md

@@ -1,81 +0,0 @@
-# Sprig: Template functions for Go templates
-[![Stability: Sustained](https://masterminds.github.io/stability/sustained.svg)](https://masterminds.github.io/stability/sustained.html)
-[![Build Status](https://travis-ci.org/Masterminds/sprig.svg?branch=master)](https://travis-ci.org/Masterminds/sprig)
-
-The Go language comes with a [built-in template
-language](http://golang.org/pkg/text/template/), but not
-very many template functions. This library provides a group of commonly
-used template functions.
-
-It is inspired by the template functions found in
-[Twig](http://twig.sensiolabs.org/documentation) and also in various
-JavaScript libraries, such as [underscore.js](http://underscorejs.org/).
-
-## Usage
-
-Template developers can read the [Sprig function documentation](http://masterminds.github.io/sprig/) to
-learn about the >100 template functions available.
-
-For Go developers wishing to include Sprig as a library in their programs,
-API documentation is available [at GoDoc.org](http://godoc.org/github.com/Masterminds/sprig), but
-read on for standard usage.
-
-### Load the Sprig library
-
-To load the Sprig `FuncMap`:
-
-```go
-
-import (
-  "github.com/Masterminds/sprig"
-  "html/template"
-)
-
-// This example illustrates that the FuncMap *must* be set before the
-// templates themselves are loaded.
-tpl := template.Must(
-  template.New("base").Funcs(sprig.FuncMap()).ParseGlob("*.html")
-)
-
-
-```
-
-### Call the functions inside of templates
-
-By convention, all functions are lowercase. This seems to follow the Go
-idiom for template functions (as opposed to template methods, which are
-TitleCase).
-
-
-Example:
-
-```
-{{ "hello!" | upper | repeat 5 }}
-```
-
-Produces:
-
-```
-HELLO!HELLO!HELLO!HELLO!HELLO!
-```
-
-## Principles:
-
-The following principles were used in deciding on which functions to add, and
-determining how to implement them.
-
-- Template functions should be used to build layout. Therefore, the following
-  types of operations are within the domain of template functions:
-  - Formatting
-  - Layout
-  - Simple type conversions
-  - Utilities that assist in handling common formatting and layout needs (e.g. arithmetic)
-- Template functions should not return errors unless there is no way to print
-  a sensible value. For example, converting a string to an integer should not
-  produce an error if conversion fails. Instead, it should display a default
-  value that can be displayed.
-- Simple math is necessary for grid layouts, pagers, and so on. Complex math
-  (anything other than arithmetic) should be done outside of templates.
-- Template functions only deal with the data passed into them. They never retrieve
-  data from a source.
-- Finally, do not override core Go template functions.

vendor/github.com/Masterminds/sprig/appveyor.yml

@@ -1,26 +0,0 @@
-
-version: build-{build}.{branch}
-
-clone_folder: C:\gopath\src\github.com\Masterminds\sprig
-shallow_clone: true
-
-environment:
-  GOPATH: C:\gopath
-
-platform:
-  - x64
-
-install:
-  - go get -u github.com/Masterminds/glide
-  - set PATH=%GOPATH%\bin;%PATH%
-  - go version
-  - go env
-
-build_script:
-  - glide install
-  - go install ./...
-
-test_script:
-  - go test -v
-
-deploy: off

vendor/github.com/Masterminds/sprig/crypto.go

@@ -1,430 +0,0 @@
-package sprig
-
-import (
-	"bytes"
-	"crypto/dsa"
-	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/hmac"
-	"crypto/rand"
-	"crypto/rsa"
-	"crypto/sha1"
-	"crypto/sha256"
-	"crypto/x509"
-	"crypto/x509/pkix"
-	"encoding/asn1"
-	"encoding/base64"
-	"encoding/binary"
-	"encoding/hex"
-	"encoding/pem"
-	"errors"
-	"fmt"
-	"math/big"
-	"net"
-	"time"
-
-	"github.com/google/uuid"
-	"golang.org/x/crypto/scrypt"
-)
-
-func sha256sum(input string) string {
-	hash := sha256.Sum256([]byte(input))
-	return hex.EncodeToString(hash[:])
-}
-
-func sha1sum(input string) string {
-	hash := sha1.Sum([]byte(input))
-	return hex.EncodeToString(hash[:])
-}
-
-// uuidv4 provides a safe and secure UUID v4 implementation
-func uuidv4() string {
-	return fmt.Sprintf("%s", uuid.New())
-}
-
-var master_password_seed = "com.lyndir.masterpassword"
-
-var password_type_templates = map[string][][]byte{
-	"maximum": {[]byte("anoxxxxxxxxxxxxxxxxx"), []byte("axxxxxxxxxxxxxxxxxno")},
-	"long": {[]byte("CvcvnoCvcvCvcv"), []byte("CvcvCvcvnoCvcv"), []byte("CvcvCvcvCvcvno"), []byte("CvccnoCvcvCvcv"), []byte("CvccCvcvnoCvcv"),
-		[]byte("CvccCvcvCvcvno"), []byte("CvcvnoCvccCvcv"), []byte("CvcvCvccnoCvcv"), []byte("CvcvCvccCvcvno"), []byte("CvcvnoCvcvCvcc"),
-		[]byte("CvcvCvcvnoCvcc"), []byte("CvcvCvcvCvccno"), []byte("CvccnoCvccCvcv"), []byte("CvccCvccnoCvcv"), []byte("CvccCvccCvcvno"),
-		[]byte("CvcvnoCvccCvcc"), []byte("CvcvCvccnoCvcc"), []byte("CvcvCvccCvccno"), []byte("CvccnoCvcvCvcc"), []byte("CvccCvcvnoCvcc"),
-		[]byte("CvccCvcvCvccno")},
-	"medium": {[]byte("CvcnoCvc"), []byte("CvcCvcno")},
-	"short":  {[]byte("Cvcn")},
-	"basic":  {[]byte("aaanaaan"), []byte("aannaaan"), []byte("aaannaaa")},
-	"pin":    {[]byte("nnnn")},
-}
-
-var template_characters = map[byte]string{
-	'V': "AEIOU",
-	'C': "BCDFGHJKLMNPQRSTVWXYZ",
-	'v': "aeiou",
-	'c': "bcdfghjklmnpqrstvwxyz",
-	'A': "AEIOUBCDFGHJKLMNPQRSTVWXYZ",
-	'a': "AEIOUaeiouBCDFGHJKLMNPQRSTVWXYZbcdfghjklmnpqrstvwxyz",
-	'n': "0123456789",
-	'o': "@&%?,=[]_:-+*$#!'^~;()/.",
-	'x': "AEIOUaeiouBCDFGHJKLMNPQRSTVWXYZbcdfghjklmnpqrstvwxyz0123456789!@#$%^&*()",
-}
-
-func derivePassword(counter uint32, password_type, password, user, site string) string {
-	var templates = password_type_templates[password_type]
-	if templates == nil {
-		return fmt.Sprintf("cannot find password template %s", password_type)
-	}
-
-	var buffer bytes.Buffer
-	buffer.WriteString(master_password_seed)
-	binary.Write(&buffer, binary.BigEndian, uint32(len(user)))
-	buffer.WriteString(user)
-
-	salt := buffer.Bytes()
-	key, err := scrypt.Key([]byte(password), salt, 32768, 8, 2, 64)
-	if err != nil {
-		return fmt.Sprintf("failed to derive password: %s", err)
-	}
-
-	buffer.Truncate(len(master_password_seed))
-	binary.Write(&buffer, binary.BigEndian, uint32(len(site)))
-	buffer.WriteString(site)
-	binary.Write(&buffer, binary.BigEndian, counter)
-
-	var hmacv = hmac.New(sha256.New, key)
-	hmacv.Write(buffer.Bytes())
-	var seed = hmacv.Sum(nil)
-	var temp = templates[int(seed[0])%len(templates)]
-
-	buffer.Truncate(0)
-	for i, element := range temp {
-		pass_chars := template_characters[element]
-		pass_char := pass_chars[int(seed[i+1])%len(pass_chars)]
-		buffer.WriteByte(pass_char)
-	}
-
-	return buffer.String()
-}
-
-func generatePrivateKey(typ string) string {
-	var priv interface{}
-	var err error
-	switch typ {
-	case "", "rsa":
-		// good enough for government work
-		priv, err = rsa.GenerateKey(rand.Reader, 4096)
-	case "dsa":
-		key := new(dsa.PrivateKey)
-		// again, good enough for government work
-		if err = dsa.GenerateParameters(&key.Parameters, rand.Reader, dsa.L2048N256); err != nil {
-			return fmt.Sprintf("failed to generate dsa params: %s", err)
-		}
-		err = dsa.GenerateKey(key, rand.Reader)
-		priv = key
-	case "ecdsa":
-		// again, good enough for government work
-		priv, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
-	default:
-		return "Unknown type " + typ
-	}
-	if err != nil {
-		return fmt.Sprintf("failed to generate private key: %s", err)
-	}
-
-	return string(pem.EncodeToMemory(pemBlockForKey(priv)))
-}
-
-type DSAKeyFormat struct {
-	Version       int
-	P, Q, G, Y, X *big.Int
-}
-
-func pemBlockForKey(priv interface{}) *pem.Block {
-	switch k := priv.(type) {
-	case *rsa.PrivateKey:
-		return &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(k)}
-	case *dsa.PrivateKey:
-		val := DSAKeyFormat{
-			P: k.P, Q: k.Q, G: k.G,
-			Y: k.Y, X: k.X,
-		}
-		bytes, _ := asn1.Marshal(val)
-		return &pem.Block{Type: "DSA PRIVATE KEY", Bytes: bytes}
-	case *ecdsa.PrivateKey:
-		b, _ := x509.MarshalECPrivateKey(k)
-		return &pem.Block{Type: "EC PRIVATE KEY", Bytes: b}
-	default:
-		return nil
-	}
-}
-
-type certificate struct {
-	Cert string
-	Key  string
-}
-
-func buildCustomCertificate(b64cert string, b64key string) (certificate, error) {
-	crt := certificate{}
-
-	cert, err := base64.StdEncoding.DecodeString(b64cert)
-	if err != nil {
-		return crt, errors.New("unable to decode base64 certificate")
-	}
-
-	key, err := base64.StdEncoding.DecodeString(b64key)
-	if err != nil {
-		return crt, errors.New("unable to decode base64 private key")
-	}
-
-	decodedCert, _ := pem.Decode(cert)
-	if decodedCert == nil {
-		return crt, errors.New("unable to decode certificate")
-	}
-	_, err = x509.ParseCertificate(decodedCert.Bytes)
-	if err != nil {
-		return crt, fmt.Errorf(
-			"error parsing certificate: decodedCert.Bytes: %s",
-			err,
-		)
-	}
-
-	decodedKey, _ := pem.Decode(key)
-	if decodedKey == nil {
-		return crt, errors.New("unable to decode key")
-	}
-	_, err = x509.ParsePKCS1PrivateKey(decodedKey.Bytes)
-	if err != nil {
-		return crt, fmt.Errorf(
-			"error parsing prive key: decodedKey.Bytes: %s",
-			err,
-		)
-	}
-
-	crt.Cert = string(cert)
-	crt.Key = string(key)
-
-	return crt, nil
-}
-
-func generateCertificateAuthority(
-	cn string,
-	daysValid int,
-) (certificate, error) {
-	ca := certificate{}
-
-	template, err := getBaseCertTemplate(cn, nil, nil, daysValid)
-	if err != nil {
-		return ca, err
-	}
-	// Override KeyUsage and IsCA
-	template.KeyUsage = x509.KeyUsageKeyEncipherment |
-		x509.KeyUsageDigitalSignature |
-		x509.KeyUsageCertSign
-	template.IsCA = true
-
-	priv, err := rsa.GenerateKey(rand.Reader, 2048)
-	if err != nil {
-		return ca, fmt.Errorf("error generating rsa key: %s", err)
-	}
-
-	ca.Cert, ca.Key, err = getCertAndKey(template, priv, template, priv)
-	if err != nil {
-		return ca, err
-	}
-
-	return ca, nil
-}
-
-func generateSelfSignedCertificate(
-	cn string,
-	ips []interface{},
-	alternateDNS []interface{},
-	daysValid int,
-) (certificate, error) {
-	cert := certificate{}
-
-	template, err := getBaseCertTemplate(cn, ips, alternateDNS, daysValid)
-	if err != nil {
-		return cert, err
-	}
-
-	priv, err := rsa.GenerateKey(rand.Reader, 2048)
-	if err != nil {
-		return cert, fmt.Errorf("error generating rsa key: %s", err)
-	}
-
-	cert.Cert, cert.Key, err = getCertAndKey(template, priv, template, priv)
-	if err != nil {
-		return cert, err
-	}
-
-	return cert, nil
-}
-
-func generateSignedCertificate(
-	cn string,
-	ips []interface{},
-	alternateDNS []interface{},
-	daysValid int,
-	ca certificate,
-) (certificate, error) {
-	cert := certificate{}
-
-	decodedSignerCert, _ := pem.Decode([]byte(ca.Cert))
-	if decodedSignerCert == nil {
-		return cert, errors.New("unable to decode certificate")
-	}
-	signerCert, err := x509.ParseCertificate(decodedSignerCert.Bytes)
-	if err != nil {
-		return cert, fmt.Errorf(
-			"error parsing certificate: decodedSignerCert.Bytes: %s",
-			err,
-		)
-	}
-	decodedSignerKey, _ := pem.Decode([]byte(ca.Key))
-	if decodedSignerKey == nil {
-		return cert, errors.New("unable to decode key")
-	}
-	signerKey, err := x509.ParsePKCS1PrivateKey(decodedSignerKey.Bytes)
-	if err != nil {
-		return cert, fmt.Errorf(
-			"error parsing prive key: decodedSignerKey.Bytes: %s",
-			err,
-		)
-	}
-
-	template, err := getBaseCertTemplate(cn, ips, alternateDNS, daysValid)
-	if err != nil {
-		return cert, err
-	}
-
-	priv, err := rsa.GenerateKey(rand.Reader, 2048)
-	if err != nil {
-		return cert, fmt.Errorf("error generating rsa key: %s", err)
-	}
-
-	cert.Cert, cert.Key, err = getCertAndKey(
-		template,
-		priv,
-		signerCert,
-		signerKey,
-	)
-	if err != nil {
-		return cert, err
-	}
-
-	return cert, nil
-}
-
-func getCertAndKey(
-	template *x509.Certificate,
-	signeeKey *rsa.PrivateKey,
-	parent *x509.Certificate,
-	signingKey *rsa.PrivateKey,
-) (string, string, error) {
-	derBytes, err := x509.CreateCertificate(
-		rand.Reader,
-		template,
-		parent,
-		&signeeKey.PublicKey,
-		signingKey,
-	)
-	if err != nil {
-		return "", "", fmt.Errorf("error creating certificate: %s", err)
-	}
-
-	certBuffer := bytes.Buffer{}
-	if err := pem.Encode(
-		&certBuffer,
-		&pem.Block{Type: "CERTIFICATE", Bytes: derBytes},
-	); err != nil {
-		return "", "", fmt.Errorf("error pem-encoding certificate: %s", err)
-	}
-
-	keyBuffer := bytes.Buffer{}
-	if err := pem.Encode(
-		&keyBuffer,
-		&pem.Block{
-			Type:  "RSA PRIVATE KEY",
-			Bytes: x509.MarshalPKCS1PrivateKey(signeeKey),
-		},
-	); err != nil {
-		return "", "", fmt.Errorf("error pem-encoding key: %s", err)
-	}
-
-	return string(certBuffer.Bytes()), string(keyBuffer.Bytes()), nil
-}
-
-func getBaseCertTemplate(
-	cn string,
-	ips []interface{},
-	alternateDNS []interface{},
-	daysValid int,
-) (*x509.Certificate, error) {
-	ipAddresses, err := getNetIPs(ips)
-	if err != nil {
-		return nil, err
-	}
-	dnsNames, err := getAlternateDNSStrs(alternateDNS)
-	if err != nil {
-		return nil, err
-	}
-	return &x509.Certificate{
-		SerialNumber: big.NewInt(1),
-		Subject: pkix.Name{
-			CommonName: cn,
-		},
-		IPAddresses: ipAddresses,
-		DNSNames:    dnsNames,
-		NotBefore:   time.Now(),
-		NotAfter:    time.Now().Add(time.Hour * 24 * time.Duration(daysValid)),
-		KeyUsage:    x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
-		ExtKeyUsage: []x509.ExtKeyUsage{
-			x509.ExtKeyUsageServerAuth,
-			x509.ExtKeyUsageClientAuth,
-		},
-		BasicConstraintsValid: true,
-	}, nil
-}
-
-func getNetIPs(ips []interface{}) ([]net.IP, error) {
-	if ips == nil {
-		return []net.IP{}, nil
-	}
-	var ipStr string
-	var ok bool
-	var netIP net.IP
-	netIPs := make([]net.IP, len(ips))
-	for i, ip := range ips {
-		ipStr, ok = ip.(string)
-		if !ok {
-			return nil, fmt.Errorf("error parsing ip: %v is not a string", ip)
-		}
-		netIP = net.ParseIP(ipStr)
-		if netIP == nil {
-			return nil, fmt.Errorf("error parsing ip: %s", ipStr)
-		}
-		netIPs[i] = netIP
-	}
-	return netIPs, nil
-}
-
-func getAlternateDNSStrs(alternateDNS []interface{}) ([]string, error) {
-	if alternateDNS == nil {
-		return []string{}, nil
-	}
-	var dnsStr string
-	var ok bool
-	alternateDNSStrs := make([]string, len(alternateDNS))
-	for i, dns := range alternateDNS {
-		dnsStr, ok = dns.(string)
-		if !ok {
-			return nil, fmt.Errorf(
-				"error processing alternate dns name: %v is not a string",
-				dns,
-			)
-		}
-		alternateDNSStrs[i] = dnsStr
-	}
-	return alternateDNSStrs, nil
-}

vendor/github.com/Masterminds/sprig/date.go

@@ -1,76 +0,0 @@
-package sprig
-
-import (
-	"time"
-)
-
-// Given a format and a date, format the date string.
-//
-// Date can be a `time.Time` or an `int, int32, int64`.
-// In the later case, it is treated as seconds since UNIX
-// epoch.
-func date(fmt string, date interface{}) string {
-	return dateInZone(fmt, date, "Local")
-}
-
-func htmlDate(date interface{}) string {
-	return dateInZone("2006-01-02", date, "Local")
-}
-
-func htmlDateInZone(date interface{}, zone string) string {
-	return dateInZone("2006-01-02", date, zone)
-}
-
-func dateInZone(fmt string, date interface{}, zone string) string {
-	var t time.Time
-	switch date := date.(type) {
-	default:
-		t = time.Now()
-	case time.Time:
-		t = date
-	case int64:
-		t = time.Unix(date, 0)
-	case int:
-		t = time.Unix(int64(date), 0)
-	case int32:
-		t = time.Unix(int64(date), 0)
-	}
-
-	loc, err := time.LoadLocation(zone)
-	if err != nil {
-		loc, _ = time.LoadLocation("UTC")
-	}
-
-	return t.In(loc).Format(fmt)
-}
-
-func dateModify(fmt string, date time.Time) time.Time {
-	d, err := time.ParseDuration(fmt)
-	if err != nil {
-		return date
-	}
-	return date.Add(d)
-}
-
-func dateAgo(date interface{}) string {
-	var t time.Time
-
-	switch date := date.(type) {
-	default:
-		t = time.Now()
-	case time.Time:
-		t = date
-	case int64:
-		t = time.Unix(date, 0)
-	case int:
-		t = time.Unix(int64(date), 0)
-	}
-	// Drop resolution to seconds
-	duration := time.Since(t).Round(time.Second)
-	return duration.String()
-}
-
-func toDate(fmt, str string) time.Time {
-	t, _ := time.ParseInLocation(fmt, str, time.Local)
-	return t
-}

vendor/github.com/Masterminds/sprig/defaults.go

@@ -1,84 +0,0 @@
-package sprig
-
-import (
-	"encoding/json"
-	"reflect"
-)
-
-// dfault checks whether `given` is set, and returns default if not set.
-//
-// This returns `d` if `given` appears not to be set, and `given` otherwise.
-//
-// For numeric types 0 is unset.
-// For strings, maps, arrays, and slices, len() = 0 is considered unset.
-// For bool, false is unset.
-// Structs are never considered unset.
-//
-// For everything else, including pointers, a nil value is unset.
-func dfault(d interface{}, given ...interface{}) interface{} {
-
-	if empty(given) || empty(given[0]) {
-		return d
-	}
-	return given[0]
-}
-
-// empty returns true if the given value has the zero value for its type.
-func empty(given interface{}) bool {
-	g := reflect.ValueOf(given)
-	if !g.IsValid() {
-		return true
-	}
-
-	// Basically adapted from text/template.isTrue
-	switch g.Kind() {
-	default:
-		return g.IsNil()
-	case reflect.Array, reflect.Slice, reflect.Map, reflect.String:
-		return g.Len() == 0
-	case reflect.Bool:
-		return g.Bool() == false
-	case reflect.Complex64, reflect.Complex128:
-		return g.Complex() == 0
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		return g.Int() == 0
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		return g.Uint() == 0
-	case reflect.Float32, reflect.Float64:
-		return g.Float() == 0
-	case reflect.Struct:
-		return false
-	}
-	return true
-}
-
-// coalesce returns the first non-empty value.
-func coalesce(v ...interface{}) interface{} {
-	for _, val := range v {
-		if !empty(val) {
-			return val
-		}
-	}
-	return nil
-}
-
-// toJson encodes an item into a JSON string
-func toJson(v interface{}) string {
-	output, _ := json.Marshal(v)
-	return string(output)
-}
-
-// toPrettyJson encodes an item into a pretty (indented) JSON string
-func toPrettyJson(v interface{}) string {
-	output, _ := json.MarshalIndent(v, "", "  ")
-	return string(output)
-}
-
-// ternary returns the first value if the last value is true, otherwise returns the second value.
-func ternary(vt interface{}, vf interface{}, v bool) interface{} {
-	if v {
-		return vt
-	}
-
-	return vf
-}

vendor/github.com/Masterminds/sprig/dict.go

@@ -1,88 +0,0 @@
-package sprig
-
-import "github.com/imdario/mergo"
-
-func set(d map[string]interface{}, key string, value interface{}) map[string]interface{} {
-	d[key] = value
-	return d
-}
-
-func unset(d map[string]interface{}, key string) map[string]interface{} {
-	delete(d, key)
-	return d
-}
-
-func hasKey(d map[string]interface{}, key string) bool {
-	_, ok := d[key]
-	return ok
-}
-
-func pluck(key string, d ...map[string]interface{}) []interface{} {
-	res := []interface{}{}
-	for _, dict := range d {
-		if val, ok := dict[key]; ok {
-			res = append(res, val)
-		}
-	}
-	return res
-}
-
-func keys(dicts ...map[string]interface{}) []string {
-	k := []string{}
-	for _, dict := range dicts {
-		for key := range dict {
-			k = append(k, key)
-		}
-	}
-	return k
-}
-
-func pick(dict map[string]interface{}, keys ...string) map[string]interface{} {
-	res := map[string]interface{}{}
-	for _, k := range keys {
-		if v, ok := dict[k]; ok {
-			res[k] = v
-		}
-	}
-	return res
-}
-
-func omit(dict map[string]interface{}, keys ...string) map[string]interface{} {
-	res := map[string]interface{}{}
-
-	omit := make(map[string]bool, len(keys))
-	for _, k := range keys {
-		omit[k] = true
-	}
-
-	for k, v := range dict {
-		if _, ok := omit[k]; !ok {
-			res[k] = v
-		}
-	}
-	return res
-}
-
-func dict(v ...interface{}) map[string]interface{} {
-	dict := map[string]interface{}{}
-	lenv := len(v)
-	for i := 0; i < lenv; i += 2 {
-		key := strval(v[i])
-		if i+1 >= lenv {
-			dict[key] = ""
-			continue
-		}
-		dict[key] = v[i+1]
-	}
-	return dict
-}
-
-func merge(dst map[string]interface{}, srcs ...map[string]interface{}) interface{} {
-	for _, src := range srcs {
-		if err := mergo.Merge(&dst, src); err != nil {
-			// Swallow errors inside of a template.
-			return ""
-		}
-	}
-	return dst
-}

vendor/github.com/Masterminds/sprig/doc.go

@@ -1,233 +0,0 @@
-/*
-Sprig: Template functions for Go.
-
-This package contains a number of utility functions for working with data
-inside of Go `html/template` and `text/template` files.
-
-To add these functions, use the `template.Funcs()` method:
-
-	t := templates.New("foo").Funcs(sprig.FuncMap())
-
-Note that you should add the function map before you parse any template files.
-
-	In several cases, Sprig reverses the order of arguments from the way they
-	appear in the standard library. This is to make it easier to pipe
-	arguments into functions.
-
-Date Functions
-
-	- date FORMAT TIME: Format a date, where a date is an integer type or a time.Time type, and
-	  format is a time.Format formatting string.
-	- dateModify: Given a date, modify it with a duration: `date_modify "-1.5h" now`. If the duration doesn't
-	  parse, it returns the time unaltered. See `time.ParseDuration` for info on duration strings.
-	- now: Current time.Time, for feeding into date-related functions.
-	- htmlDate TIME: Format a date for use in the value field of an HTML "date" form element.
-	- dateInZone FORMAT TIME TZ: Like date, but takes three arguments: format, timestamp,
-	  timezone.
-	- htmlDateInZone TIME TZ: Like htmlDate, but takes two arguments: timestamp,
-	  timezone.
-
-String Functions
-
-	- abbrev: Truncate a string with ellipses. `abbrev 5 "hello world"` yields "he..."
-	- abbrevboth: Abbreviate from both sides, yielding "...lo wo..."
-	- trunc: Truncate a string (no suffix). `trunc 5 "Hello World"` yields "hello".
-	- trim: strings.TrimSpace
-	- trimAll: strings.Trim, but with the argument order reversed `trimAll "$" "$5.00"` or `"$5.00 | trimAll "$"`
-	- trimSuffix: strings.TrimSuffix, but with the argument order reversed: `trimSuffix "-" "ends-with-"`
-	- trimPrefix: strings.TrimPrefix, but with the argument order reversed `trimPrefix "$" "$5"`
-	- upper: strings.ToUpper
-	- lower: strings.ToLower
-	- nospace: Remove all space characters from a string. `nospace "h e l l o"` becomes "hello"
-	- title: strings.Title
-	- untitle: Remove title casing
-	- repeat: strings.Repeat, but with the arguments switched: `repeat count str`. (This simplifies common pipelines)
-	- substr: Given string, start, and length, return a substr.
-	- initials: Given a multi-word string, return the initials. `initials "Matt Butcher"` returns "MB"
-	- randAlphaNum: Given a length, generate a random alphanumeric sequence
-	- randAlpha: Given a length, generate an alphabetic string
-	- randAscii: Given a length, generate a random ASCII string (symbols included)
-	- randNumeric: Given a length, generate a string of digits.
-	- swapcase: SwapCase swaps the case of a string using a word based algorithm. see https://godoc.org/github.com/Masterminds/goutils#SwapCase
-	- shuffle: Shuffle randomizes runes in a string and returns the result. It uses default random source in `math/rand`
-	- snakecase: convert all upper case characters in a string to underscore format.
-	- camelcase: convert all lower case characters behind underscores to upper case character
-	- wrap: Force a line wrap at the given width. `wrap 80 "imagine a longer string"`
-	- wrapWith: Wrap a line at the given length, but using 'sep' instead of a newline. `wrapWith 50, "<br>", $html`
-	- contains: strings.Contains, but with the arguments switched: `contains substr str`. (This simplifies common pipelines)
-	- hasPrefix: strings.hasPrefix, but with the arguments switched
-	- hasSuffix: strings.hasSuffix, but with the arguments switched
-	- quote: Wrap string(s) in double quotation marks, escape the contents by adding '\' before '"'.
-	- squote: Wrap string(s) in double quotation marks, does not escape content.
-	- cat: Concatenate strings, separating them by spaces. `cat $a $b $c`.
-	- indent: Indent a string using space characters. `indent 4 "foo\nbar"` produces "    foo\n    bar"
-	- nindent: Indent a string using space characters and prepend a new line. `indent 4 "foo\nbar"` produces "\n    foo\n    bar"
-	- replace: Replace an old with a new in a string: `$name | replace " " "-"`
-	- plural: Choose singular or plural based on length: `len $fish | plural "one anchovy" "many anchovies"`
-	- sha256sum: Generate a hex encoded sha256 hash of the input
-	- toString: Convert something to a string
-
-String Slice Functions:
-
-	- join: strings.Join, but as `join SEP SLICE`
-	- split: strings.Split, but as `split SEP STRING`. The results are returned
-	  as a map with the indexes set to _N, where N is an integer starting from 0.
-	  Use it like this: `{{$v := "foo/bar/baz" | split "/"}}{{$v._0}}` (Prints `foo`)
-	- splitList: strings.Split, but as `split SEP STRING`. The results are returned
-	  as an array.
-	- toStrings: convert a list to a list of strings. 'list 1 2 3 | toStrings' produces '["1" "2" "3"]'
-	- sortAlpha: sort a list lexicographically.
-
-Integer Slice Functions:
-
-	- until: Given an integer, returns a slice of counting integers from 0 to one
-	  less than the given integer: `range $i, $e := until 5`
-	- untilStep: Given start, stop, and step, return an integer slice starting at
-	  'start', stopping at `stop`, and incrementing by 'step. This is the same
-	  as Python's long-form of 'range'.
-
-Conversions:
-
-	- atoi: Convert a string to an integer. 0 if the integer could not be parsed.
-	- int64: Convert a string or another numeric type to an int64.
-	- int: Convert a string or another numeric type to an int.
-	- float64: Convert a string or another numeric type to a float64.
-
-Defaults:
-
-	- default: Give a default value. Used like this: trim "   "| default "empty".
-	  Since trim produces an empty string, the default value is returned. For
-	  things with a length (strings, slices, maps), len(0) will trigger the default.
-	  For numbers, the value 0 will trigger the default. For booleans, false will
-	  trigger the default. For structs, the default is never returned (there is
-	  no clear empty condition). For everything else, nil value triggers a default.
-	- empty: Return true if the given value is the zero value for its type.
-	  Caveats: structs are always non-empty. This should match the behavior of
-	  {{if pipeline}}, but can be used inside of a pipeline.
-	- coalesce: Given a list of items, return the first non-empty one.
-	  This follows the same rules as 'empty'. '{{ coalesce .someVal 0 "hello" }}`
-	  will return `.someVal` if set, or else return "hello". The 0 is skipped
-	  because it is an empty value.
-	- compact: Return a copy of a list with all of the empty values removed.
-	  'list 0 1 2 "" | compact' will return '[1 2]'
-	- ternary: Given a value,'true | ternary "b" "c"' will return "b".
-	  'false | ternary "b" "c"' will return '"c"'. Similar to the JavaScript ternary
-	  operator.
-
-OS:
-	- env: Resolve an environment variable
-	- expandenv: Expand a string through the environment
-
-File Paths:
-	- base: Return the last element of a path. https://golang.org/pkg/path#Base
-	- dir: Remove the last element of a path. https://golang.org/pkg/path#Dir
-	- clean: Clean a path to the shortest equivalent name.  (e.g. remove "foo/.."
-	  from "foo/../bar.html") https://golang.org/pkg/path#Clean
-	- ext: https://golang.org/pkg/path#Ext
-	- isAbs: https://golang.org/pkg/path#IsAbs
-
-Encoding:
-	- b64enc: Base 64 encode a string.
-	- b64dec: Base 64 decode a string.
-
-Reflection:
-
-	- typeOf: Takes an interface and returns a string representation of the type.
-	  For pointers, this will return a type prefixed with an asterisk(`*`). So
-	  a pointer to type `Foo` will be `*Foo`.
-	- typeIs: Compares an interface with a string name, and returns true if they match.
-	  Note that a pointer will not match a reference. For example `*Foo` will not
-	  match `Foo`.
-	- typeIsLike: Compares an interface with a string name and returns true if
-	  the interface is that `name` or that `*name`. In other words, if the given
-	  value matches the given type or is a pointer to the given type, this returns
-	  true.
-	- kindOf: Takes an interface and returns a string representation of its kind.
-	- kindIs: Returns true if the given string matches the kind of the given interface.
-
-	Note: None of these can test whether or not something implements a given
-	interface, since doing so would require compiling the interface in ahead of
-	time.
-
-Data Structures:
-
-	- tuple: Takes an arbitrary list of items and returns a slice of items. Its
-	  tuple-ish properties are mainly gained through the template idiom, and not
-	  through an API provided here. WARNING: The implementation of tuple will
-	  change in the future.
-	- list: An arbitrary ordered list of items. (This is prefered over tuple.)
-	- dict: Takes a list of name/values and returns a map[string]interface{}.
-	  The first parameter is converted to a string and stored as a key, the
-	  second parameter is treated as the value. And so on, with odds as keys and
-	  evens as values. If the function call ends with an odd, the last key will
-	  be assigned the empty string. Non-string keys are converted to strings as
-	  follows: []byte are converted, fmt.Stringers will have String() called.
-	  errors will have Error() called. All others will be passed through
-	  fmt.Sprintf("%v").
-
-Lists Functions:
-
-These are used to manipulate lists: '{{ list 1 2 3 | reverse | first }}'
-
-	- first: Get the first item in a 'list'. 'list 1 2 3 | first' prints '1'
-	- last: Get the last item in a 'list': 'list 1 2 3 | last ' prints '3'
-	- rest: Get all but the first item in a list: 'list 1 2 3 | rest' returns '[2 3]'
-	- initial: Get all but the last item in a list: 'list 1 2 3 | initial' returns '[1 2]'
-	- append: Add an item to the end of a list: 'append $list 4' adds '4' to the end of '$list'
-	- prepend: Add an item to the beginning of a list: 'prepend $list 4' puts 4 at the beginning of the list.
-	- reverse: Reverse the items in a list.
-	- uniq: Remove duplicates from a list.
-	- without: Return a list with the given values removed: 'without (list 1 2 3) 1' would return '[2 3]'
-	- has: Return 'true' if the item is found in the list: 'has "foo" $list' will return 'true' if the list contains "foo"
-
-Dict Functions:
-
-These are used to manipulate dicts.
-
-	- set: Takes a dict, a key, and a value, and sets that key/value pair in
-	  the dict. `set $dict $key $value`. For convenience, it returns the dict,
-	  even though the dict was modified in place.
-	- unset: Takes a dict and a key, and deletes that key/value pair from the
-	  dict. `unset $dict $key`. This returns the dict for convenience.
-	- hasKey: Takes a dict and a key, and returns boolean true if the key is in
-	  the dict.
-	- pluck: Given a key and one or more maps, get all of the values for that key.
-	- keys: Get an array of all of the keys in one or more dicts.
-	- pick: Select just the given keys out of the dict, and return a new dict.
-	- omit: Return a dict without the given keys.
-
-Math Functions:
-
-Integer functions will convert integers of any width to `int64`. If a
-string is passed in, functions will attempt to convert with
-`strconv.ParseInt(s, 1064)`. If this fails, the value will be treated as 0.
-
-	- add1: Increment an integer by 1
-	- add: Sum an arbitrary number of integers
-	- sub: Subtract the second integer from the first
-	- div: Divide the first integer by the second
-	- mod: Module of first integer divided by second
-	- mul: Multiply integers
-	- max: Return the biggest of a series of one or more integers
-	- min: Return the smallest of a series of one or more integers
-	- biggest: DEPRECATED. Return the biggest of a series of one or more integers
-
-Crypto Functions:
-
-	- genPrivateKey: Generate a private key for the given cryptosystem. If no
-	  argument is supplied, by default it will generate a private key using
-	  the RSA algorithm. Accepted values are `rsa`, `dsa`, and `ecdsa`.
-	- derivePassword: Derive a password from the given parameters according to the ["Master Password" algorithm](http://masterpasswordapp.com/algorithm.html)
-	  Given parameters (in order) are:
-          `counter` (starting with 1), `password_type` (maximum, long, medium, short, basic, or pin), `password`,
-           `user`, and `site`
-
-SemVer Functions:
-
-These functions provide version parsing and comparisons for SemVer 2 version
-strings.
-
-	- semver: Parse a semantic version and return a Version object.
-	- semverCompare: Compare a SemVer range to a particular version.
-*/
-package sprig

vendor/github.com/Masterminds/sprig/functions.go

@@ -1,281 +0,0 @@
-package sprig
-
-import (
-	"errors"
-	"html/template"
-	"os"
-	"path"
-	"strconv"
-	"strings"
-	ttemplate "text/template"
-	"time"
-
-	util "github.com/aokoli/goutils"
-	"github.com/huandu/xstrings"
-)
-
-// Produce the function map.
-//
-// Use this to pass the functions into the template engine:
-//
-// 	tpl := template.New("foo").Funcs(sprig.FuncMap()))
-//
-func FuncMap() template.FuncMap {
-	return HtmlFuncMap()
-}
-
-// HermeticTextFuncMap returns a 'text/template'.FuncMap with only repeatable functions.
-func HermeticTxtFuncMap() ttemplate.FuncMap {
-	r := TxtFuncMap()
-	for _, name := range nonhermeticFunctions {
-		delete(r, name)
-	}
-	return r
-}
-
-// HermeticHtmlFuncMap returns an 'html/template'.Funcmap with only repeatable functions.
-func HermeticHtmlFuncMap() template.FuncMap {
-	r := HtmlFuncMap()
-	for _, name := range nonhermeticFunctions {
-		delete(r, name)
-	}
-	return r
-}
-
-// TextFuncMap returns a 'text/template'.FuncMap
-func TxtFuncMap() ttemplate.FuncMap {
-	return ttemplate.FuncMap(GenericFuncMap())
-}
-
-// HtmlFuncMap returns an 'html/template'.Funcmap
-func HtmlFuncMap() template.FuncMap {
-	return template.FuncMap(GenericFuncMap())
-}
-
-// GenericFuncMap returns a copy of the basic function map as a map[string]interface{}.
-func GenericFuncMap() map[string]interface{} {
-	gfm := make(map[string]interface{}, len(genericMap))
-	for k, v := range genericMap {
-		gfm[k] = v
-	}
-	return gfm
-}
-
-// These functions are not guaranteed to evaluate to the same result for given input, because they
-// refer to the environemnt or global state.
-var nonhermeticFunctions = []string{
-	// Date functions
-	"date",
-	"date_in_zone",
-	"date_modify",
-	"now",
-	"htmlDate",
-	"htmlDateInZone",
-	"dateInZone",
-	"dateModify",
-
-	// Strings
-	"randAlphaNum",
-	"randAlpha",
-	"randAscii",
-	"randNumeric",
-	"uuidv4",
-
-	// OS
-	"env",
-	"expandenv",
-}
-
-var genericMap = map[string]interface{}{
-	"hello": func() string { return "Hello!" },
-
-	// Date functions
-	"date":           date,
-	"date_in_zone":   dateInZone,
-	"date_modify":    dateModify,
-	"now":            func() time.Time { return time.Now() },
-	"htmlDate":       htmlDate,
-	"htmlDateInZone": htmlDateInZone,
-	"dateInZone":     dateInZone,
-	"dateModify":     dateModify,
-	"ago":            dateAgo,
-	"toDate":         toDate,
-
-	// Strings
-	"abbrev":     abbrev,
-	"abbrevboth": abbrevboth,
-	"trunc":      trunc,
-	"trim":       strings.TrimSpace,
-	"upper":      strings.ToUpper,
-	"lower":      strings.ToLower,
-	"title":      strings.Title,
-	"untitle":    untitle,
-	"substr":     substring,
-	// Switch order so that "foo" | repeat 5
-	"repeat": func(count int, str string) string { return strings.Repeat(str, count) },
-	// Deprecated: Use trimAll.
-	"trimall": func(a, b string) string { return strings.Trim(b, a) },
-	// Switch order so that "$foo" | trimall "$"
-	"trimAll":      func(a, b string) string { return strings.Trim(b, a) },
-	"trimSuffix":   func(a, b string) string { return strings.TrimSuffix(b, a) },
-	"trimPrefix":   func(a, b string) string { return strings.TrimPrefix(b, a) },
-	"nospace":      util.DeleteWhiteSpace,
-	"initials":     initials,
-	"randAlphaNum": randAlphaNumeric,
-	"randAlpha":    randAlpha,
-	"randAscii":    randAscii,
-	"randNumeric":  randNumeric,
-	"swapcase":     util.SwapCase,
-	"shuffle":      xstrings.Shuffle,
-	"snakecase":    xstrings.ToSnakeCase,
-	"camelcase":    xstrings.ToCamelCase,
-	"wrap":         func(l int, s string) string { return util.Wrap(s, l) },
-	"wrapWith":     func(l int, sep, str string) string { return util.WrapCustom(str, l, sep, true) },
-	// Switch order so that "foobar" | contains "foo"
-	"contains":  func(substr string, str string) bool { return strings.Contains(str, substr) },
-	"hasPrefix": func(substr string, str string) bool { return strings.HasPrefix(str, substr) },
-	"hasSuffix": func(substr string, str string) bool { return strings.HasSuffix(str, substr) },
-	"quote":     quote,
-	"squote":    squote,
-	"cat":       cat,
-	"indent":    indent,
-	"nindent":   nindent,
-	"replace":   replace,
-	"plural":    plural,
-	"sha1sum":   sha1sum,
-	"sha256sum": sha256sum,
-	"toString":  strval,
-
-	// Wrap Atoi to stop errors.
-	"atoi":    func(a string) int { i, _ := strconv.Atoi(a); return i },
-	"int64":   toInt64,
-	"int":     toInt,
-	"float64": toFloat64,
-
-	//"gt": func(a, b int) bool {return a > b},
-	//"gte": func(a, b int) bool {return a >= b},
-	//"lt": func(a, b int) bool {return a < b},
-	//"lte": func(a, b int) bool {return a <= b},
-
-	// split "/" foo/bar returns map[int]string{0: foo, 1: bar}
-	"split":     split,
-	"splitList": func(sep, orig string) []string { return strings.Split(orig, sep) },
-	"toStrings": strslice,
-
-	"until":     until,
-	"untilStep": untilStep,
-
-	// VERY basic arithmetic.
-	"add1": func(i interface{}) int64 { return toInt64(i) + 1 },
-	"add": func(i ...interface{}) int64 {
-		var a int64 = 0
-		for _, b := range i {
-			a += toInt64(b)
-		}
-		return a
-	},
-	"sub": func(a, b interface{}) int64 { return toInt64(a) - toInt64(b) },
-	"div": func(a, b interface{}) int64 { return toInt64(a) / toInt64(b) },
-	"mod": func(a, b interface{}) int64 { return toInt64(a) % toInt64(b) },
-	"mul": func(a interface{}, v ...interface{}) int64 {
-		val := toInt64(a)
-		for _, b := range v {
-			val = val * toInt64(b)
-		}
-		return val
-	},
-	"biggest": max,
-	"max":     max,
-	"min":     min,
-	"ceil":    ceil,
-	"floor":   floor,
-	"round":   round,
-
-	// string slices. Note that we reverse the order b/c that's better
-	// for template processing.
-	"join":      join,
-	"sortAlpha": sortAlpha,
-
-	// Defaults
-	"default":      dfault,
-	"empty":        empty,
-	"coalesce":     coalesce,
-	"compact":      compact,
-	"toJson":       toJson,
-	"toPrettyJson": toPrettyJson,
-	"ternary":      ternary,
-
-	// Reflection
-	"typeOf":     typeOf,
-	"typeIs":     typeIs,
-	"typeIsLike": typeIsLike,
-	"kindOf":     kindOf,
-	"kindIs":     kindIs,
-
-	// OS:
-	"env":       func(s string) string { return os.Getenv(s) },
-	"expandenv": func(s string) string { return os.ExpandEnv(s) },
-
-	// File Paths:
-	"base":  path.Base,
-	"dir":   path.Dir,
-	"clean": path.Clean,
-	"ext":   path.Ext,
-	"isAbs": path.IsAbs,
-
-	// Encoding:
-	"b64enc": base64encode,
-	"b64dec": base64decode,
-	"b32enc": base32encode,
-	"b32dec": base32decode,
-
-	// Data Structures:
-	"tuple":  list, // FIXME: with the addition of append/prepend these are no longer immutable.
-	"list":   list,
-	"dict":   dict,
-	"set":    set,
-	"unset":  unset,
-	"hasKey": hasKey,
-	"pluck":  pluck,
-	"keys":   keys,
-	"pick":   pick,
-	"omit":   omit,
-	"merge":  merge,
-
-	"append": push, "push": push,
-	"prepend": prepend,
-	"first":   first,
-	"rest":    rest,
-	"last":    last,
-	"initial": initial,
-	"reverse": reverse,
-	"uniq":    uniq,
-	"without": without,
-	"has":     has,
-
-	// Crypto:
-	"genPrivateKey":     generatePrivateKey,
-	"derivePassword":    derivePassword,
-	"buildCustomCert":   buildCustomCertificate,
-	"genCA":             generateCertificateAuthority,
-	"genSelfSignedCert": generateSelfSignedCertificate,
-	"genSignedCert":     generateSignedCertificate,
-
-	// UUIDs:
-	"uuidv4": uuidv4,
-
-	// SemVer:
-	"semver":        semver,
-	"semverCompare": semverCompare,
-
-	// Flow Control:
-	"fail": func(msg string) (string, error) { return "", errors.New(msg) },
-
-	// Regex
-	"regexMatch":             regexMatch,
-	"regexFindAll":           regexFindAll,
-	"regexFind":              regexFind,
-	"regexReplaceAll":        regexReplaceAll,
-	"regexReplaceAllLiteral": regexReplaceAllLiteral,
-	"regexSplit":             regexSplit,
-}

vendor/github.com/Masterminds/sprig/glide.lock

@@ -1,33 +0,0 @@
-hash: 770b6a1132b743dadf6a0bb5fb8bf7083b1a5209f6d6c07826234ab2a97aade9
-updated: 2018-04-02T23:08:56.947456531+02:00
-imports:
-- name: github.com/aokoli/goutils
-  version: 9c37978a95bd5c709a15883b6242714ea6709e64
-- name: github.com/google/uuid
-  version: 064e2069ce9c359c118179501254f67d7d37ba24
-- name: github.com/huandu/xstrings
-  version: 3959339b333561bf62a38b424fd41517c2c90f40
-- name: github.com/imdario/mergo
-  version: 7fe0c75c13abdee74b09fcacef5ea1c6bba6a874
-- name: github.com/Masterminds/goutils
-  version: 3391d3790d23d03408670993e957e8f408993c34
-- name: github.com/Masterminds/semver
-  version: 59c29afe1a994eacb71c833025ca7acf874bb1da
-- name: github.com/stretchr/testify
-  version: e3a8ff8ce36581f87a15341206f205b1da467059
-  subpackages:
-  - assert
-- name: golang.org/x/crypto
-  version: d172538b2cfce0c13cee31e647d0367aa8cd2486
-  subpackages:
-  - pbkdf2
-  - scrypt
-testImports:
-- name: github.com/davecgh/go-spew
-  version: 5215b55f46b2b919f50a1df0eaa5886afe4e3b3d
-  subpackages:
-  - spew
-- name: github.com/pmezard/go-difflib
-  version: d8ed2627bdf02c080bf22230dbb337003b7aba2d
-  subpackages:
-  - difflib

vendor/github.com/Masterminds/sprig/glide.yaml

@@ -1,15 +0,0 @@
-package: github.com/Masterminds/sprig
-import:
-- package: github.com/Masterminds/goutils
-  version: ^1.0.0
-- package: github.com/google/uuid
-  version: ^0.2
-- package: golang.org/x/crypto
-  subpackages:
-  - scrypt
-- package: github.com/Masterminds/semver
-  version: v1.2.2
-- package: github.com/stretchr/testify
-- package: github.com/imdario/mergo
-  version: ~0.2.2
-- package: github.com/huandu/xstrings

vendor/github.com/Masterminds/sprig/list.go

@@ -1,259 +0,0 @@
-package sprig
-
-import (
-	"fmt"
-	"reflect"
-	"sort"
-)
-
-// Reflection is used in these functions so that slices and arrays of strings,
-// ints, and other types not implementing []interface{} can be worked with.
-// For example, this is useful if you need to work on the output of regexs.
-
-func list(v ...interface{}) []interface{} {
-	return v
-}
-
-func push(list interface{}, v interface{}) []interface{} {
-	tp := reflect.TypeOf(list).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(list)
-
-		l := l2.Len()
-		nl := make([]interface{}, l)
-		for i := 0; i < l; i++ {
-			nl[i] = l2.Index(i).Interface()
-		}
-
-		return append(nl, v)
-
-	default:
-		panic(fmt.Sprintf("Cannot push on type %s", tp))
-	}
-}
-
-func prepend(list interface{}, v interface{}) []interface{} {
-	//return append([]interface{}{v}, list...)
-
-	tp := reflect.TypeOf(list).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(list)
-
-		l := l2.Len()
-		nl := make([]interface{}, l)
-		for i := 0; i < l; i++ {
-			nl[i] = l2.Index(i).Interface()
-		}
-
-		return append([]interface{}{v}, nl...)
-
-	default:
-		panic(fmt.Sprintf("Cannot prepend on type %s", tp))
-	}
-}
-
-func last(list interface{}) interface{} {
-	tp := reflect.TypeOf(list).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(list)
-
-		l := l2.Len()
-		if l == 0 {
-			return nil
-		}
-
-		return l2.Index(l - 1).Interface()
-	default:
-		panic(fmt.Sprintf("Cannot find last on type %s", tp))
-	}
-}
-
-func first(list interface{}) interface{} {
-	tp := reflect.TypeOf(list).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(list)
-
-		l := l2.Len()
-		if l == 0 {
-			return nil
-		}
-
-		return l2.Index(0).Interface()
-	default:
-		panic(fmt.Sprintf("Cannot find first on type %s", tp))
-	}
-}
-
-func rest(list interface{}) []interface{} {
-	tp := reflect.TypeOf(list).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(list)
-
-		l := l2.Len()
-		if l == 0 {
-			return nil
-		}
-
-		nl := make([]interface{}, l-1)
-		for i := 1; i < l; i++ {
-			nl[i-1] = l2.Index(i).Interface()
-		}
-
-		return nl
-	default:
-		panic(fmt.Sprintf("Cannot find rest on type %s", tp))
-	}
-}
-
-func initial(list interface{}) []interface{} {
-	tp := reflect.TypeOf(list).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(list)
-
-		l := l2.Len()
-		if l == 0 {
-			return nil
-		}
-
-		nl := make([]interface{}, l-1)
-		for i := 0; i < l-1; i++ {
-			nl[i] = l2.Index(i).Interface()
-		}
-
-		return nl
-	default:
-		panic(fmt.Sprintf("Cannot find initial on type %s", tp))
-	}
-}
-
-func sortAlpha(list interface{}) []string {
-	k := reflect.Indirect(reflect.ValueOf(list)).Kind()
-	switch k {
-	case reflect.Slice, reflect.Array:
-		a := strslice(list)
-		s := sort.StringSlice(a)
-		s.Sort()
-		return s
-	}
-	return []string{strval(list)}
-}
-
-func reverse(v interface{}) []interface{} {
-	tp := reflect.TypeOf(v).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(v)
-
-		l := l2.Len()
-		// We do not sort in place because the incoming array should not be altered.
-		nl := make([]interface{}, l)
-		for i := 0; i < l; i++ {
-			nl[l-i-1] = l2.Index(i).Interface()
-		}
-
-		return nl
-	default:
-		panic(fmt.Sprintf("Cannot find reverse on type %s", tp))
-	}
-}
-
-func compact(list interface{}) []interface{} {
-	tp := reflect.TypeOf(list).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(list)
-
-		l := l2.Len()
-		nl := []interface{}{}
-		var item interface{}
-		for i := 0; i < l; i++ {
-			item = l2.Index(i).Interface()
-			if !empty(item) {
-				nl = append(nl, item)
-			}
-		}
-
-		return nl
-	default:
-		panic(fmt.Sprintf("Cannot compact on type %s", tp))
-	}
-}
-
-func uniq(list interface{}) []interface{} {
-	tp := reflect.TypeOf(list).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(list)
-
-		l := l2.Len()
-		dest := []interface{}{}
-		var item interface{}
-		for i := 0; i < l; i++ {
-			item = l2.Index(i).Interface()
-			if !inList(dest, item) {
-				dest = append(dest, item)
-			}
-		}
-
-		return dest
-	default:
-		panic(fmt.Sprintf("Cannot find uniq on type %s", tp))
-	}
-}
-
-func inList(haystack []interface{}, needle interface{}) bool {
-	for _, h := range haystack {
-		if reflect.DeepEqual(needle, h) {
-			return true
-		}
-	}
-	return false
-}
-
-func without(list interface{}, omit ...interface{}) []interface{} {
-	tp := reflect.TypeOf(list).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(list)
-
-		l := l2.Len()
-		res := []interface{}{}
-		var item interface{}
-		for i := 0; i < l; i++ {
-			item = l2.Index(i).Interface()
-			if !inList(omit, item) {
-				res = append(res, item)
-			}
-		}
-
-		return res
-	default:
-		panic(fmt.Sprintf("Cannot find without on type %s", tp))
-	}
-}
-
-func has(needle interface{}, haystack interface{}) bool {
-	tp := reflect.TypeOf(haystack).Kind()
-	switch tp {
-	case reflect.Slice, reflect.Array:
-		l2 := reflect.ValueOf(haystack)
-		var item interface{}
-		l := l2.Len()
-		for i := 0; i < l; i++ {
-			item = l2.Index(i).Interface()
-			if reflect.DeepEqual(needle, item) {
-				return true
-			}
-		}
-
-		return false
-	default:
-		panic(fmt.Sprintf("Cannot find has on type %s", tp))
-	}
-}

vendor/github.com/Masterminds/sprig/numeric.go

@@ -1,159 +0,0 @@
-package sprig
-
-import (
-	"math"
-	"reflect"
-	"strconv"
-)
-
-// toFloat64 converts 64-bit floats
-func toFloat64(v interface{}) float64 {
-	if str, ok := v.(string); ok {
-		iv, err := strconv.ParseFloat(str, 64)
-		if err != nil {
-			return 0
-		}
-		return iv
-	}
-
-	val := reflect.Indirect(reflect.ValueOf(v))
-	switch val.Kind() {
-	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
-		return float64(val.Int())
-	case reflect.Uint8, reflect.Uint16, reflect.Uint32:
-		return float64(val.Uint())
-	case reflect.Uint, reflect.Uint64:
-		return float64(val.Uint())
-	case reflect.Float32, reflect.Float64:
-		return val.Float()
-	case reflect.Bool:
-		if val.Bool() == true {
-			return 1
-		}
-		return 0
-	default:
-		return 0
-	}
-}
-
-func toInt(v interface{}) int {
-	//It's not optimal. Bud I don't want duplicate toInt64 code.
-	return int(toInt64(v))
-}
-
-// toInt64 converts integer types to 64-bit integers
-func toInt64(v interface{}) int64 {
-	if str, ok := v.(string); ok {
-		iv, err := strconv.ParseInt(str, 10, 64)
-		if err != nil {
-			return 0
-		}
-		return iv
-	}
-
-	val := reflect.Indirect(reflect.ValueOf(v))
-	switch val.Kind() {
-	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
-		return val.Int()
-	case reflect.Uint8, reflect.Uint16, reflect.Uint32:
-		return int64(val.Uint())
-	case reflect.Uint, reflect.Uint64:
-		tv := val.Uint()
-		if tv <= math.MaxInt64 {
-			return int64(tv)
-		}
-		// TODO: What is the sensible thing to do here?
-		return math.MaxInt64
-	case reflect.Float32, reflect.Float64:
-		return int64(val.Float())
-	case reflect.Bool:
-		if val.Bool() == true {
-			return 1
-		}
-		return 0
-	default:
-		return 0
-	}
-}
-
-func max(a interface{}, i ...interface{}) int64 {
-	aa := toInt64(a)
-	for _, b := range i {
-		bb := toInt64(b)
-		if bb > aa {
-			aa = bb
-		}
-	}
-	return aa
-}
-
-func min(a interface{}, i ...interface{}) int64 {
-	aa := toInt64(a)
-	for _, b := range i {
-		bb := toInt64(b)
-		if bb < aa {
-			aa = bb
-		}
-	}
-	return aa
-}
-
-func until(count int) []int {
-	step := 1
-	if count < 0 {
-		step = -1
-	}
-	return untilStep(0, count, step)
-}
-
-func untilStep(start, stop, step int) []int {
-	v := []int{}
-
-	if stop < start {
-		if step >= 0 {
-			return v
-		}
-		for i := start; i > stop; i += step {
-			v = append(v, i)
-		}
-		return v
-	}
-
-	if step <= 0 {
-		return v
-	}
-	for i := start; i < stop; i += step {
-		v = append(v, i)
-	}
-	return v
-}
-
-func floor(a interface{}) float64 {
-	aa := toFloat64(a)
-	return math.Floor(aa)
-}
-
-func ceil(a interface{}) float64 {
-	aa := toFloat64(a)
-	return math.Ceil(aa)
-}
-
-func round(a interface{}, p int, r_opt ...float64) float64 {
-	roundOn := .5
-	if len(r_opt) > 0 {
-		roundOn = r_opt[0]
-	}
-	val := toFloat64(a)
-	places := toFloat64(p)
-
-	var round float64
-	pow := math.Pow(10, places)
-	digit := pow * val
-	_, div := math.Modf(digit)
-	if div >= roundOn {
-		round = math.Ceil(digit)
-	} else {
-		round = math.Floor(digit)
-	}
-	return round / pow
-}

vendor/github.com/Masterminds/sprig/reflect.go

@@ -1,28 +0,0 @@
-package sprig
-
-import (
-	"fmt"
-	"reflect"
-)
-
-// typeIs returns true if the src is the type named in target.
-func typeIs(target string, src interface{}) bool {
-	return target == typeOf(src)
-}
-
-func typeIsLike(target string, src interface{}) bool {
-	t := typeOf(src)
-	return target == t || "*"+target == t
-}
-
-func typeOf(src interface{}) string {
-	return fmt.Sprintf("%T", src)
-}
-
-func kindIs(target string, src interface{}) bool {
-	return target == kindOf(src)
-}
-
-func kindOf(src interface{}) string {
-	return reflect.ValueOf(src).Kind().String()
-}

vendor/github.com/Masterminds/sprig/regex.go

@@ -1,35 +0,0 @@
-package sprig
-
-import (
-	"regexp"
-)
-
-func regexMatch(regex string, s string) bool {
-	match, _ := regexp.MatchString(regex, s)
-	return match
-}
-
-func regexFindAll(regex string, s string, n int) []string {
-	r := regexp.MustCompile(regex)
-	return r.FindAllString(s, n)
-}
-
-func regexFind(regex string, s string) string {
-	r := regexp.MustCompile(regex)
-	return r.FindString(s)
-}
-
-func regexReplaceAll(regex string, s string, repl string) string {
-	r := regexp.MustCompile(regex)
-	return r.ReplaceAllString(s, repl)
-}
-
-func regexReplaceAllLiteral(regex string, s string, repl string) string {
-	r := regexp.MustCompile(regex)
-	return r.ReplaceAllLiteralString(s, repl)
-}
-
-func regexSplit(regex string, s string, n int) []string {
-	r := regexp.MustCompile(regex)
-	return r.Split(s, n)
-}

vendor/github.com/Masterminds/sprig/semver.go

@@ -1,23 +0,0 @@
-package sprig
-
-import (
-	sv2 "github.com/Masterminds/semver"
-)
-
-func semverCompare(constraint, version string) (bool, error) {
-	c, err := sv2.NewConstraint(constraint)
-	if err != nil {
-		return false, err
-	}
-
-	v, err := sv2.NewVersion(version)
-	if err != nil {
-		return false, err
-	}
-
-	return c.Check(v), nil
-}
-
-func semver(version string) (*sv2.Version, error) {
-	return sv2.NewVersion(version)
-}

vendor/github.com/Masterminds/sprig/strings.go

@@ -1,201 +0,0 @@
-package sprig
-
-import (
-	"encoding/base32"
-	"encoding/base64"
-	"fmt"
-	"reflect"
-	"strconv"
-	"strings"
-
-	util "github.com/aokoli/goutils"
-)
-
-func base64encode(v string) string {
-	return base64.StdEncoding.EncodeToString([]byte(v))
-}
-
-func base64decode(v string) string {
-	data, err := base64.StdEncoding.DecodeString(v)
-	if err != nil {
-		return err.Error()
-	}
-	return string(data)
-}
-
-func base32encode(v string) string {
-	return base32.StdEncoding.EncodeToString([]byte(v))
-}
-
-func base32decode(v string) string {
-	data, err := base32.StdEncoding.DecodeString(v)
-	if err != nil {
-		return err.Error()
-	}
-	return string(data)
-}
-
-func abbrev(width int, s string) string {
-	if width < 4 {
-		return s
-	}
-	r, _ := util.Abbreviate(s, width)
-	return r
-}
-
-func abbrevboth(left, right int, s string) string {
-	if right < 4 || left > 0 && right < 7 {
-		return s
-	}
-	r, _ := util.AbbreviateFull(s, left, right)
-	return r
-}
-func initials(s string) string {
-	// Wrap this just to eliminate the var args, which templates don't do well.
-	return util.Initials(s)
-}
-
-func randAlphaNumeric(count int) string {
-	// It is not possible, it appears, to actually generate an error here.
-	r, _ := util.RandomAlphaNumeric(count)
-	return r
-}
-
-func randAlpha(count int) string {
-	r, _ := util.RandomAlphabetic(count)
-	return r
-}
-
-func randAscii(count int) string {
-	r, _ := util.RandomAscii(count)
-	return r
-}
-
-func randNumeric(count int) string {
-	r, _ := util.RandomNumeric(count)
-	return r
-}
-
-func untitle(str string) string {
-	return util.Uncapitalize(str)
-}
-
-func quote(str ...interface{}) string {
-	out := make([]string, len(str))
-	for i, s := range str {
-		out[i] = fmt.Sprintf("%q", strval(s))
-	}
-	return strings.Join(out, " ")
-}
-
-func squote(str ...interface{}) string {
-	out := make([]string, len(str))
-	for i, s := range str {
-		out[i] = fmt.Sprintf("'%v'", s)
-	}
-	return strings.Join(out, " ")
-}
-
-func cat(v ...interface{}) string {
-	r := strings.TrimSpace(strings.Repeat("%v ", len(v)))
-	return fmt.Sprintf(r, v...)
-}
-
-func indent(spaces int, v string) string {
-	pad := strings.Repeat(" ", spaces)
-	return pad + strings.Replace(v, "\n", "\n"+pad, -1)
-}
-
-func nindent(spaces int, v string) string {
-	return "\n" + indent(spaces, v)
-}
-
-func replace(old, new, src string) string {
-	return strings.Replace(src, old, new, -1)
-}
-
-func plural(one, many string, count int) string {
-	if count == 1 {
-		return one
-	}
-	return many
-}
-
-func strslice(v interface{}) []string {
-	switch v := v.(type) {
-	case []string:
-		return v
-	case []interface{}:
-		l := len(v)
-		b := make([]string, l)
-		for i := 0; i < l; i++ {
-			b[i] = strval(v[i])
-		}
-		return b
-	default:
-		val := reflect.ValueOf(v)
-		switch val.Kind() {
-		case reflect.Array, reflect.Slice:
-			l := val.Len()
-			b := make([]string, l)
-			for i := 0; i < l; i++ {
-				b[i] = strval(val.Index(i).Interface())
-			}
-			return b
-		default:
-			return []string{strval(v)}
-		}
-	}
-}
-
-func strval(v interface{}) string {
-	switch v := v.(type) {
-	case string:
-		return v
-	case []byte:
-		return string(v)
-	case error:
-		return v.Error()
-	case fmt.Stringer:
-		return v.String()
-	default:
-		return fmt.Sprintf("%v", v)
-	}
-}
-
-func trunc(c int, s string) string {
-	if len(s) <= c {
-		return s
-	}
-	return s[0:c]
-}
-
-func join(sep string, v interface{}) string {
-	return strings.Join(strslice(v), sep)
-}
-
-func split(sep, orig string) map[string]string {
-	parts := strings.Split(orig, sep)
-	res := make(map[string]string, len(parts))
-	for i, v := range parts {
-		res["_"+strconv.Itoa(i)] = v
-	}
-	return res
-}
-
-// substring creates a substring of the given string.
-//
-// If start is < 0, this calls string[:length].
-//
-// If start is >= 0 and length < 0, this calls string[start:]
-//
-// Otherwise, this calls string[start, length].
-func substring(start, length int, s string) string {
-	if start < 0 {
-		return s[:length]
-	}
-	if length < 0 {
-		return s[start:]
-	}
-	return s[start:length]
-}

vendor/github.com/aokoli/goutils/.travis.yml

@@ -1,18 +0,0 @@
-language: go
-
-go:
-  - 1.6
-  - 1.7
-  - 1.8
-  - tip
-
-script:
-  - go test -v
-
-notifications:
-  webhooks:
-    urls:
-      - https://webhooks.gitter.im/e/06e3328629952dabe3e0
-    on_success: change  # options: [always|never|change] default: always
-    on_failure: always  # options: [always|never|change] default: always
-    on_start: never     # options: [always|never|change] default: always

vendor/github.com/aokoli/goutils/CHANGELOG.md

@@ -1,8 +0,0 @@
-# 1.0.1 (2017-05-31)
-
-## Fixed
-- #21: Fix generation of alphanumeric strings (thanks @dbarranco)
-
-# 1.0.0 (2014-04-30)
-
-- Initial release.

vendor/github.com/aokoli/goutils/LICENSE.txt

@@ -1,202 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
-      or by an individual or Legal Entity authorized to submit on behalf of
-      the copyright owner. For the purposes of this definition, "submitted"
-      means any form of electronic, verbal, or written communication sent
-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
-      excluding communication that is conspicuously marked or otherwise
-      designated in writing by the copyright owner as "Not a Contribution."
-
-      "Contributor" shall mean Licensor and any individual or Legal Entity
-      on behalf of whom a Contribution has been received by Licensor and
-      subsequently incorporated within the Work.
-
-   2. Grant of Copyright License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      copyright license to reproduce, prepare Derivative Works of,
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-      Work and such Derivative Works in Source or Object form.
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-          stating that You changed the files; and
-
-      (c) You must retain, in the Source form of any Derivative Works
-          that You distribute, all copyright, patent, trademark, and
-          attribution notices from the Source form of the Work,
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-      (d) If the Work includes a "NOTICE" text file as part of its
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-          include a readable copy of the attribution notices contained
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-          notices within Derivative Works that You distribute, alongside
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-      for use, reproduction, or distribution of Your modifications, or
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-      the conditions stated in this License.
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-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
-
-   7. Disclaimer of Warranty. Unless required by applicable law or
-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
-      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-      implied, including, without limitation, any warranties or conditions
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-      PARTICULAR PURPOSE. You are solely responsible for determining the
-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
-
-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
-      incidental, or consequential damages of any character arising as a
-      result of this License or out of the use or inability to use the
-      Work (including but not limited to damages for loss of goodwill,
-      work stoppage, computer failure or malfunction, or any and all
-      other commercial damages or losses), even if such Contributor
-      has been advised of the possibility of such damages.
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-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
-      replaced with your own identifying information. (Don't include
-      the brackets!)  The text should be enclosed in the appropriate
-      comment syntax for the file format. We also recommend that a
-      file or class name and description of purpose be included on the
-      same "printed page" as the copyright notice for easier
-      identification within third-party archives.
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-   Copyright [yyyy] [name of copyright owner]
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.

vendor/github.com/aokoli/goutils/README.md

@@ -1,70 +0,0 @@
-GoUtils
-===========
-[![Stability: Maintenance](https://masterminds.github.io/stability/maintenance.svg)](https://masterminds.github.io/stability/maintenance.html)
-[![GoDoc](https://godoc.org/github.com/Masterminds/goutils?status.png)](https://godoc.org/github.com/Masterminds/goutils) [![Build Status](https://travis-ci.org/Masterminds/goutils.svg?branch=master)](https://travis-ci.org/Masterminds/goutils) [![Build status](https://ci.appveyor.com/api/projects/status/sc2b1ew0m7f0aiju?svg=true)](https://ci.appveyor.com/project/mattfarina/goutils)
-
-
-GoUtils provides users with utility functions to manipulate strings in various ways. It is a Go implementation of some
-string manipulation libraries of Java Apache Commons. GoUtils includes the following Java Apache Commons classes:
-* WordUtils    
-* RandomStringUtils  
-* StringUtils (partial implementation)
-
-## Installation
-If you have Go set up on your system, from the GOPATH directory within the command line/terminal, enter this:
-
-	go get github.com/Masterminds/goutils
-
-If you do not have Go set up on your system, please follow the [Go installation directions from the documenation](http://golang.org/doc/install), and then follow the instructions above to install GoUtils.
-
-
-## Documentation
-GoUtils doc is available here: [![GoDoc](https://godoc.org/github.com/Masterminds/goutils?status.png)](https://godoc.org/github.com/Masterminds/goutils)
-
-
-## Usage
-The code snippets below show examples of how to use GoUtils. Some functions return errors while others do not. The first instance below, which does not return an error, is the `Initials` function (located within the `wordutils.go` file).
-
-    package main
-
-    import (
-        "fmt"
-    	"github.com/Masterminds/goutils"
-    )
-
-    func main() {
-
-    	// EXAMPLE 1: A goutils function which returns no errors
-        fmt.Println (goutils.Initials("John Doe Foo")) // Prints out "JDF"
-
-    }
-Some functions return errors mainly due to illegal arguements used as parameters. The code example below illustrates how to deal with function that returns an error. In this instance, the function is the `Random` function (located within the `randomstringutils.go` file).
-
-    package main
-
-    import (
-        "fmt"
-        "github.com/Masterminds/goutils"
-    )
-
-    func main() {
-
-        // EXAMPLE 2: A goutils function which returns an error
-        rand1, err1 := goutils.Random (-1, 0, 0, true, true)  
-
-        if err1 != nil {
-			fmt.Println(err1) // Prints out error message because -1 was entered as the first parameter in goutils.Random(...)
-		} else {
-			fmt.Println(rand1)
-		}
-
-    }
-
-## License
-GoUtils is licensed under the Apache License, Version 2.0. Please check the LICENSE.txt file or visit http://www.apache.org/licenses/LICENSE-2.0 for a copy of the license.
-
-## Issue Reporting
-Make suggestions or report issues using the Git issue tracker: https://github.com/Masterminds/goutils/issues
-
-## Website
-* [GoUtils webpage](http://Masterminds.github.io/goutils/)

vendor/github.com/aokoli/goutils/appveyor.yml

@@ -1,21 +0,0 @@
-version: build-{build}.{branch}
-
-clone_folder: C:\gopath\src\github.com\Masterminds\goutils
-shallow_clone: true
-
-environment:
-  GOPATH: C:\gopath
-
-platform:
-  - x64
-
-build: off
-
-install:
-  - go version
-  - go env
-
-test_script:
-  - go test -v
-
-deploy: off

vendor/github.com/aokoli/goutils/randomstringutils.go

@@ -1,268 +0,0 @@
-/*
-Copyright 2014 Alexander Okoli
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package goutils
-
-import (
-	"fmt"
-	"math"
-	"math/rand"
-	"regexp"
-	"time"
-	"unicode"
-)
-
-// RANDOM provides the time-based seed used to generate random numbers
-var RANDOM = rand.New(rand.NewSource(time.Now().UnixNano()))
-
-/*
-RandomNonAlphaNumeric creates a random string whose length is the number of characters specified.
-Characters will be chosen from the set of all characters (ASCII/Unicode values between 0 to 2,147,483,647 (math.MaxInt32)).
-
-Parameter:
-	count - the length of random string to create
-
-Returns:
-	string - the random string
-	error - an error stemming from an invalid parameter within underlying function, RandomSeed(...)
-*/
-func RandomNonAlphaNumeric(count int) (string, error) {
-	return RandomAlphaNumericCustom(count, false, false)
-}
-
-/*
-RandomAscii creates a random string whose length is the number of characters specified.
-Characters will be chosen from the set of characters whose ASCII value is between 32 and 126 (inclusive).
-
-Parameter:
-	count - the length of random string to create
-
-Returns:
-	string - the random string
-	error - an error stemming from an invalid parameter within underlying function, RandomSeed(...)
-*/
-func RandomAscii(count int) (string, error) {
-	return Random(count, 32, 127, false, false)
-}
-
-/*
-RandomNumeric creates a random string whose length is the number of characters specified.
-Characters will be chosen from the set of numeric characters.
-
-Parameter:
-	count - the length of random string to create
-
-Returns:
-	string - the random string
-	error - an error stemming from an invalid parameter within underlying function, RandomSeed(...)
-*/
-func RandomNumeric(count int) (string, error) {
-	return Random(count, 0, 0, false, true)
-}
-
-/*
-RandomAlphabetic creates a random string whose length is the number of characters specified.
-Characters will be chosen from the set of alpha-numeric characters as indicated by the arguments.
-
-Parameters:
-	count - the length of random string to create
-	letters - if true, generated string may include alphabetic characters
-	numbers - if true, generated string may include numeric characters
-
-Returns:
-	string - the random string
-	error - an error stemming from an invalid parameter within underlying function, RandomSeed(...)
-*/
-func RandomAlphabetic(count int) (string, error) {
-	return Random(count, 0, 0, true, false)
-}
-
-/*
-RandomAlphaNumeric creates a random string whose length is the number of characters specified.
-Characters will be chosen from the set of alpha-numeric characters.
-
-Parameter:
-	count - the length of random string to create
-
-Returns:
-	string - the random string
-	error - an error stemming from an invalid parameter within underlying function, RandomSeed(...)
-*/
-func RandomAlphaNumeric(count int) (string, error) {
-	RandomString, err := Random(count, 0, 0, true, true)
-	if err != nil {
-		return "", fmt.Errorf("Error: %s", err)
-	}
-	match, err := regexp.MatchString("([0-9]+)", RandomString)
-	if err != nil {
-		panic(err)
-	}
-
-	if !match {
-		//Get the position between 0 and the length of the string-1  to insert a random number
-		position := rand.Intn(count)
-		//Insert a random number between [0-9] in the position
-		RandomString = RandomString[:position] + string('0'+rand.Intn(10)) + RandomString[position+1:]
-		return RandomString, err
-	}
-	return RandomString, err
-
-}
-
-/*
-RandomAlphaNumericCustom creates a random string whose length is the number of characters specified.
-Characters will be chosen from the set of alpha-numeric characters as indicated by the arguments.
-
-Parameters:
-	count - the length of random string to create
-	letters - if true, generated string may include alphabetic characters
-	numbers - if true, generated string may include numeric characters
-
-Returns:
-	string - the random string
-	error - an error stemming from an invalid parameter within underlying function, RandomSeed(...)
-*/
-func RandomAlphaNumericCustom(count int, letters bool, numbers bool) (string, error) {
-	return Random(count, 0, 0, letters, numbers)
-}
-
-/*
-Random creates a random string based on a variety of options, using default source of randomness.
-This method has exactly the same semantics as RandomSeed(int, int, int, bool, bool, []char, *rand.Rand), but
-instead of using an externally supplied source of randomness, it uses the internal *rand.Rand instance.
-
-Parameters:
-	count - the length of random string to create
-	start - the position in set of chars (ASCII/Unicode int) to start at
-	end - the position in set of chars (ASCII/Unicode int) to end before
-	letters - if true, generated string may include alphabetic characters
-	numbers - if true, generated string may include numeric characters
-	chars - the set of chars to choose randoms from. If nil, then it will use the set of all chars.
-
-Returns:
-	string - the random string
-	error - an error stemming from an invalid parameter within underlying function, RandomSeed(...)
-*/
-func Random(count int, start int, end int, letters bool, numbers bool, chars ...rune) (string, error) {
-	return RandomSeed(count, start, end, letters, numbers, chars, RANDOM)
-}
-
-/*
-RandomSeed creates a random string based on a variety of options, using supplied source of randomness.
-If the parameters start and end are both 0, start and end are set to ' ' and 'z', the ASCII printable characters, will be used,
-unless letters and numbers are both false, in which case, start and end are set to 0 and math.MaxInt32, respectively.
-If chars is not nil, characters stored in chars that are between start and end are chosen.
-This method accepts a user-supplied *rand.Rand instance to use as a source of randomness. By seeding a single *rand.Rand instance
-with a fixed seed and using it for each call, the same random sequence of strings can be generated repeatedly and predictably.
-
-Parameters:
-	count - the length of random string to create
-	start - the position in set of chars (ASCII/Unicode decimals) to start at
-	end - the position in set of chars (ASCII/Unicode decimals) to end before
-	letters - if true, generated string may include alphabetic characters
-	numbers - if true, generated string may include numeric characters
-	chars - the set of chars to choose randoms from. If nil, then it will use the set of all chars.
-	random - a source of randomness.
-
-Returns:
-	string - the random string
-	error - an error stemming from invalid parameters: if count < 0; or the provided chars array is empty; or end <= start; or end > len(chars)
-*/
-func RandomSeed(count int, start int, end int, letters bool, numbers bool, chars []rune, random *rand.Rand) (string, error) {
-
-	if count == 0 {
-		return "", nil
-	} else if count < 0 {
-		err := fmt.Errorf("randomstringutils illegal argument: Requested random string length %v is less than 0.", count) // equiv to err := errors.New("...")
-		return "", err
-	}
-	if chars != nil && len(chars) == 0 {
-		err := fmt.Errorf("randomstringutils illegal argument: The chars array must not be empty")
-		return "", err
-	}
-
-	if start == 0 && end == 0 {
-		if chars != nil {
-			end = len(chars)
-		} else {
-			if !letters && !numbers {
-				end = math.MaxInt32
-			} else {
-				end = 'z' + 1
-				start = ' '
-			}
-		}
-	} else {
-		if end <= start {
-			err := fmt.Errorf("randomstringutils illegal argument: Parameter end (%v) must be greater than start (%v)", end, start)
-			return "", err
-		}
-
-		if chars != nil && end > len(chars) {
-			err := fmt.Errorf("randomstringutils illegal argument: Parameter end (%v) cannot be greater than len(chars) (%v)", end, len(chars))
-			return "", err
-		}
-	}
-
-	buffer := make([]rune, count)
-	gap := end - start
-
-	// high-surrogates range, (\uD800-\uDBFF) = 55296 - 56319
-	//  low-surrogates range, (\uDC00-\uDFFF) = 56320 - 57343
-
-	for count != 0 {
-		count--
-		var ch rune
-		if chars == nil {
-			ch = rune(random.Intn(gap) + start)
-		} else {
-			ch = chars[random.Intn(gap)+start]
-		}
-
-		if letters && unicode.IsLetter(ch) || numbers && unicode.IsDigit(ch) || !letters && !numbers {
-			if ch >= 56320 && ch <= 57343 { // low surrogate range
-				if count == 0 {
-					count++
-				} else {
-					// Insert low surrogate
-					buffer[count] = ch
-					count--
-					// Insert high surrogate
-					buffer[count] = rune(55296 + random.Intn(128))
-				}
-			} else if ch >= 55296 && ch <= 56191 { // High surrogates range (Partial)
-				if count == 0 {
-					count++
-				} else {
-					// Insert low surrogate
-					buffer[count] = rune(56320 + random.Intn(128))
-					count--
-					// Insert high surrogate
-					buffer[count] = ch
-				}
-			} else if ch >= 56192 && ch <= 56319 {
-				// private high surrogate, skip it
-				count++
-			} else {
-				// not one of the surrogates*
-				buffer[count] = ch
-			}
-		} else {
-			count++
-		}
-	}
-	return string(buffer), nil
-}

vendor/github.com/aokoli/goutils/stringutils.go

@@ -1,224 +0,0 @@
-/*
-Copyright 2014 Alexander Okoli
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package goutils
-
-import (
-	"bytes"
-	"fmt"
-	"strings"
-	"unicode"
-)
-
-// Typically returned by functions where a searched item cannot be found
-const INDEX_NOT_FOUND = -1
-
-/*
-Abbreviate abbreviates a string using ellipses. This will turn  the string "Now is the time for all good men" into "Now is the time for..."
-
-Specifically, the algorithm is as follows:
-
-    - If str is less than maxWidth characters long, return it.
-    - Else abbreviate it to (str[0:maxWidth - 3] + "...").
-    - If maxWidth is less than 4, return an illegal argument error.
-    - In no case will it return a string of length greater than maxWidth.
-
-Parameters:
-    str -  the string to check
-    maxWidth - maximum length of result string, must be at least 4
-
-Returns:
-    string - abbreviated string
-    error - if the width is too small
-*/
-func Abbreviate(str string, maxWidth int) (string, error) {
-	return AbbreviateFull(str, 0, maxWidth)
-}
-
-/*
-AbbreviateFull abbreviates a string using ellipses. This will turn the string "Now is the time for all good men" into "...is the time for..."
-This function works like Abbreviate(string, int), but allows you to specify a "left edge" offset. Note that this left edge is not
-necessarily going to be the leftmost character in the result, or the first character following the ellipses, but it will appear
-somewhere in the result.
-In no case will it return a string of length greater than maxWidth.
-
-Parameters:
-    str - the string to check
-    offset - left edge of source string
-    maxWidth - maximum length of result string, must be at least 4
-
-Returns:
-    string - abbreviated string
-    error - if the width is too small
-*/
-func AbbreviateFull(str string, offset int, maxWidth int) (string, error) {
-	if str == "" {
-		return "", nil
-	}
-	if maxWidth < 4 {
-		err := fmt.Errorf("stringutils illegal argument: Minimum abbreviation width is 4")
-		return "", err
-	}
-	if len(str) <= maxWidth {
-		return str, nil
-	}
-	if offset > len(str) {
-		offset = len(str)
-	}
-	if len(str)-offset < (maxWidth - 3) { // 15 - 5 < 10 - 3 =  10 < 7
-		offset = len(str) - (maxWidth - 3)
-	}
-	abrevMarker := "..."
-	if offset <= 4 {
-		return str[0:maxWidth-3] + abrevMarker, nil // str.substring(0, maxWidth - 3) + abrevMarker;
-	}
-	if maxWidth < 7 {
-		err := fmt.Errorf("stringutils illegal argument: Minimum abbreviation width with offset is 7")
-		return "", err
-	}
-	if (offset + maxWidth - 3) < len(str) { // 5 + (10-3) < 15 = 12 < 15
-		abrevStr, _ := Abbreviate(str[offset:len(str)], (maxWidth - 3))
-		return abrevMarker + abrevStr, nil // abrevMarker + abbreviate(str.substring(offset), maxWidth - 3);
-	}
-	return abrevMarker + str[(len(str)-(maxWidth-3)):len(str)], nil // abrevMarker + str.substring(str.length() - (maxWidth - 3));
-}
-
-/*
-DeleteWhiteSpace deletes all whitespaces from a string as defined by unicode.IsSpace(rune).
-It returns the string without whitespaces.
-
-Parameter:
-    str - the string to delete whitespace from, may be nil
-
-Returns:
-    the string without whitespaces
-*/
-func DeleteWhiteSpace(str string) string {
-	if str == "" {
-		return str
-	}
-	sz := len(str)
-	var chs bytes.Buffer
-	count := 0
-	for i := 0; i < sz; i++ {
-		ch := rune(str[i])
-		if !unicode.IsSpace(ch) {
-			chs.WriteRune(ch)
-			count++
-		}
-	}
-	if count == sz {
-		return str
-	}
-	return chs.String()
-}
-
-/*
-IndexOfDifference compares two strings, and returns the index at which the strings begin to differ.
-
-Parameters:
-    str1 - the first string
-    str2 - the second string
-
-Returns:
-    the index where str1 and str2 begin to differ; -1 if they are equal
-*/
-func IndexOfDifference(str1 string, str2 string) int {
-	if str1 == str2 {
-		return INDEX_NOT_FOUND
-	}
-	if IsEmpty(str1) || IsEmpty(str2) {
-		return 0
-	}
-	var i int
-	for i = 0; i < len(str1) && i < len(str2); i++ {
-		if rune(str1[i]) != rune(str2[i]) {
-			break
-		}
-	}
-	if i < len(str2) || i < len(str1) {
-		return i
-	}
-	return INDEX_NOT_FOUND
-}
-
-/*
-IsBlank checks if a string is whitespace or empty (""). Observe the following behavior:
-
-    goutils.IsBlank("")        = true
-    goutils.IsBlank(" ")       = true
-    goutils.IsBlank("bob")     = false
-    goutils.IsBlank("  bob  ") = false
-
-Parameter:
-    str - the string to check
-
-Returns:
-    true - if the string is whitespace or empty ("")
-*/
-func IsBlank(str string) bool {
-	strLen := len(str)
-	if str == "" || strLen == 0 {
-		return true
-	}
-	for i := 0; i < strLen; i++ {
-		if unicode.IsSpace(rune(str[i])) == false {
-			return false
-		}
-	}
-	return true
-}
-
-/*
-IndexOf returns the index of the first instance of sub in str, with the search beginning from the
-index start point specified. -1 is returned if sub is not present in str.
-
-An empty string ("") will return -1 (INDEX_NOT_FOUND). A negative start position is treated as zero.
-A start position greater than the string length returns -1.
-
-Parameters:
-    str - the string to check
-    sub - the substring to find
-    start - the start position; negative treated as zero
-
-Returns:
-    the first index where the sub string was found  (always >= start)
-*/
-func IndexOf(str string, sub string, start int) int {
-
-	if start < 0 {
-		start = 0
-	}
-
-	if len(str) < start {
-		return INDEX_NOT_FOUND
-	}
-
-	if IsEmpty(str) || IsEmpty(sub) {
-		return INDEX_NOT_FOUND
-	}
-
-	partialIndex := strings.Index(str[start:len(str)], sub)
-	if partialIndex == -1 {
-		return INDEX_NOT_FOUND
-	}
-	return partialIndex + start
-}
-
-// IsEmpty checks if a string is empty (""). Returns true if empty, and false otherwise.
-func IsEmpty(str string) bool {
-	return len(str) == 0
-}

vendor/github.com/aokoli/goutils/wordutils.go

@@ -1,356 +0,0 @@
-/*
-Copyright 2014 Alexander Okoli
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-/*
-Package goutils provides utility functions to manipulate strings in various ways.
-The code snippets below show examples of how to use goutils. Some functions return
-errors while others do not, so usage would vary as a result.
-
-Example:
-
-    package main
-
-    import (
-        "fmt"
-        "github.com/aokoli/goutils"
-    )
-
-    func main() {
-
-        // EXAMPLE 1: A goutils function which returns no errors
-        fmt.Println (goutils.Initials("John Doe Foo")) // Prints out "JDF"
-
-
-
-        // EXAMPLE 2: A goutils function which returns an error
-        rand1, err1 := goutils.Random (-1, 0, 0, true, true)
-
-        if err1 != nil {
-            fmt.Println(err1) // Prints out error message because -1 was entered as the first parameter in goutils.Random(...)
-        } else {
-            fmt.Println(rand1)
-        }
-    }
-*/
-package goutils
-
-import (
-	"bytes"
-	"strings"
-	"unicode"
-)
-
-// VERSION indicates the current version of goutils
-const VERSION = "1.0.0"
-
-/*
-Wrap wraps a single line of text, identifying words by ' '.
-New lines will be separated by '\n'. Very long words, such as URLs will not be wrapped.
-Leading spaces on a new line are stripped. Trailing spaces are not stripped.
-
-Parameters:
-    str - the string to be word wrapped
-    wrapLength - the column (a column can fit only one character) to wrap the words at, less than 1 is treated as 1
-
-Returns:
-    a line with newlines inserted
-*/
-func Wrap(str string, wrapLength int) string {
-	return WrapCustom(str, wrapLength, "", false)
-}
-
-/*
-WrapCustom wraps a single line of text, identifying words by ' '.
-Leading spaces on a new line are stripped. Trailing spaces are not stripped.
-
-Parameters:
-    str - the string to be word wrapped
-    wrapLength - the column number (a column can fit only one character) to wrap the words at, less than 1 is treated as 1
-    newLineStr - the string to insert for a new line, "" uses '\n'
-    wrapLongWords - true if long words (such as URLs) should be wrapped
-
-Returns:
-    a line with newlines inserted
-*/
-func WrapCustom(str string, wrapLength int, newLineStr string, wrapLongWords bool) string {
-
-	if str == "" {
-		return ""
-	}
-	if newLineStr == "" {
-		newLineStr = "\n" // TODO Assumes "\n" is seperator. Explore SystemUtils.LINE_SEPARATOR from Apache Commons
-	}
-	if wrapLength < 1 {
-		wrapLength = 1
-	}
-
-	inputLineLength := len(str)
-	offset := 0
-
-	var wrappedLine bytes.Buffer
-
-	for inputLineLength-offset > wrapLength {
-
-		if rune(str[offset]) == ' ' {
-			offset++
-			continue
-		}
-
-		end := wrapLength + offset + 1
-		spaceToWrapAt := strings.LastIndex(str[offset:end], " ") + offset
-
-		if spaceToWrapAt >= offset {
-			// normal word (not longer than wrapLength)
-			wrappedLine.WriteString(str[offset:spaceToWrapAt])
-			wrappedLine.WriteString(newLineStr)
-			offset = spaceToWrapAt + 1
-
-		} else {
-			// long word or URL
-			if wrapLongWords {
-				end := wrapLength + offset
-				// long words are wrapped one line at a time
-				wrappedLine.WriteString(str[offset:end])
-				wrappedLine.WriteString(newLineStr)
-				offset += wrapLength
-			} else {
-				// long words aren't wrapped, just extended beyond limit
-				end := wrapLength + offset
-				spaceToWrapAt = strings.IndexRune(str[end:len(str)], ' ') + end
-				if spaceToWrapAt >= 0 {
-					wrappedLine.WriteString(str[offset:spaceToWrapAt])
-					wrappedLine.WriteString(newLineStr)
-					offset = spaceToWrapAt + 1
-				} else {
-					wrappedLine.WriteString(str[offset:len(str)])
-					offset = inputLineLength
-				}
-			}
-		}
-	}
-
-	wrappedLine.WriteString(str[offset:len(str)])
-
-	return wrappedLine.String()
-
-}
-
-/*
-Capitalize capitalizes all the delimiter separated words in a string. Only the first letter of each word is changed.
-To convert the rest of each word to lowercase at the same time, use CapitalizeFully(str string, delimiters ...rune).
-The delimiters represent a set of characters understood to separate words. The first string character
-and the first non-delimiter character after a delimiter will be capitalized. A "" input string returns "".
-Capitalization uses the Unicode title case, normally equivalent to upper case.
-
-Parameters:
-    str - the string to capitalize
-    delimiters - set of characters to determine capitalization, exclusion of this parameter means whitespace would be delimeter
-
-Returns:
-    capitalized string
-*/
-func Capitalize(str string, delimiters ...rune) string {
-
-	var delimLen int
-
-	if delimiters == nil {
-		delimLen = -1
-	} else {
-		delimLen = len(delimiters)
-	}
-
-	if str == "" || delimLen == 0 {
-		return str
-	}
-
-	buffer := []rune(str)
-	capitalizeNext := true
-	for i := 0; i < len(buffer); i++ {
-		ch := buffer[i]
-		if isDelimiter(ch, delimiters...) {
-			capitalizeNext = true
-		} else if capitalizeNext {
-			buffer[i] = unicode.ToTitle(ch)
-			capitalizeNext = false
-		}
-	}
-	return string(buffer)
-
-}
-
-/*
-CapitalizeFully converts all the delimiter separated words in a string into capitalized words, that is each word is made up of a
-titlecase character and then a series of lowercase characters. The delimiters represent a set of characters understood
-to separate words. The first string character and the first non-delimiter character after a delimiter will be capitalized.
-Capitalization uses the Unicode title case, normally equivalent to upper case.
-
-Parameters:
-    str - the string to capitalize fully
-    delimiters - set of characters to determine capitalization, exclusion of this parameter means whitespace would be delimeter
-
-Returns:
-    capitalized string
-*/
-func CapitalizeFully(str string, delimiters ...rune) string {
-
-	var delimLen int
-
-	if delimiters == nil {
-		delimLen = -1
-	} else {
-		delimLen = len(delimiters)
-	}
-
-	if str == "" || delimLen == 0 {
-		return str
-	}
-	str = strings.ToLower(str)
-	return Capitalize(str, delimiters...)
-}
-
-/*
-Uncapitalize uncapitalizes all the whitespace separated words in a string. Only the first letter of each word is changed.
-The delimiters represent a set of characters understood to separate words. The first string character and the first non-delimiter
-character after a delimiter will be uncapitalized. Whitespace is defined by unicode.IsSpace(char).
-
-Parameters:
-    str - the string to uncapitalize fully
-    delimiters - set of characters to determine capitalization, exclusion of this parameter means whitespace would be delimeter
-
-Returns:
-    uncapitalized string
-*/
-func Uncapitalize(str string, delimiters ...rune) string {
-
-	var delimLen int
-
-	if delimiters == nil {
-		delimLen = -1
-	} else {
-		delimLen = len(delimiters)
-	}
-
-	if str == "" || delimLen == 0 {
-		return str
-	}
-
-	buffer := []rune(str)
-	uncapitalizeNext := true // TODO Always makes capitalize/un apply to first char.
-	for i := 0; i < len(buffer); i++ {
-		ch := buffer[i]
-		if isDelimiter(ch, delimiters...) {
-			uncapitalizeNext = true
-		} else if uncapitalizeNext {
-			buffer[i] = unicode.ToLower(ch)
-			uncapitalizeNext = false
-		}
-	}
-	return string(buffer)
-}
-
-/*
-SwapCase swaps the case of a string using a word based algorithm.
-
-Conversion algorithm:
-
-    Upper case character converts to Lower case
-    Title case character converts to Lower case
-    Lower case character after Whitespace or at start converts to Title case
-    Other Lower case character converts to Upper case
-    Whitespace is defined by unicode.IsSpace(char).
-
-Parameters:
-    str - the string to swap case
-
-Returns:
-    the changed string
-*/
-func SwapCase(str string) string {
-	if str == "" {
-		return str
-	}
-	buffer := []rune(str)
-
-	whitespace := true
-
-	for i := 0; i < len(buffer); i++ {
-		ch := buffer[i]
-		if unicode.IsUpper(ch) {
-			buffer[i] = unicode.ToLower(ch)
-			whitespace = false
-		} else if unicode.IsTitle(ch) {
-			buffer[i] = unicode.ToLower(ch)
-			whitespace = false
-		} else if unicode.IsLower(ch) {
-			if whitespace {
-				buffer[i] = unicode.ToTitle(ch)
-				whitespace = false
-			} else {
-				buffer[i] = unicode.ToUpper(ch)
-			}
-		} else {
-			whitespace = unicode.IsSpace(ch)
-		}
-	}
-	return string(buffer)
-}
-
-/*
-Initials extracts the initial letters from each word in the string. The first letter of the string and all first
-letters after the defined delimiters are returned as a new string. Their case is not changed. If the delimiters
-parameter is excluded, then Whitespace is used. Whitespace is defined by unicode.IsSpacea(char). An empty delimiter array returns an empty string.
-
-Parameters:
-    str - the string to get initials from
-    delimiters - set of characters to determine words, exclusion of this parameter means whitespace would be delimeter
-Returns:
-    string of initial letters
-*/
-func Initials(str string, delimiters ...rune) string {
-	if str == "" {
-		return str
-	}
-	if delimiters != nil && len(delimiters) == 0 {
-		return ""
-	}
-	strLen := len(str)
-	var buf bytes.Buffer
-	lastWasGap := true
-	for i := 0; i < strLen; i++ {
-		ch := rune(str[i])
-
-		if isDelimiter(ch, delimiters...) {
-			lastWasGap = true
-		} else if lastWasGap {
-			buf.WriteRune(ch)
-			lastWasGap = false
-		}
-	}
-	return buf.String()
-}
-
-// private function (lower case func name)
-func isDelimiter(ch rune, delimiters ...rune) bool {
-	if delimiters == nil {
-		return unicode.IsSpace(ch)
-	}
-	for _, delimiter := range delimiters {
-		if ch == delimiter {
-			return true
-		}
-	}
-	return false
-}

vendor/github.com/google/uuid/.travis.yml

@@ -1,9 +0,0 @@
-language: go
-
-go:
-  - 1.4.3
-  - 1.5.3
-  - tip
-
-script:
-  - go test -v ./...

vendor/github.com/google/uuid/CONTRIBUTING.md

@@ -1,10 +0,0 @@
-# How to contribute
-
-We definitely welcome patches and contribution to this project!
-
-### Legal requirements
-
-In order to protect both you and ourselves, you will need to sign the
-[Contributor License Agreement](https://cla.developers.google.com/clas).
-
-You may have already signed it for other Google projects.

vendor/github.com/google/uuid/CONTRIBUTORS

@@ -1,9 +0,0 @@
-Paul Borman <borman@google.com>
-bmatsuo
-shawnps
-theory
-jboverfelt
-dsymonds
-cd1
-wallclockbuilder
-dansouza

vendor/github.com/google/uuid/LICENSE

@@ -1,27 +0,0 @@
-Copyright (c) 2009,2014 Google Inc. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/google/uuid/README.md

@@ -1,23 +0,0 @@
-**This package is currently in development and the API may not be stable.**
-
-The API will become stable with v1.
-
-# uuid ![build status](https://travis-ci.org/google/uuid.svg?branch=master)
-The uuid package generates and inspects UUIDs based on
-[RFC 4122](http://tools.ietf.org/html/rfc4122)
-and DCE 1.1: Authentication and Security Services. 
-
-This package is based on the github.com/pborman/uuid package (previously named
-code.google.com/p/go-uuid).  It differs from these earlier packages in that
-a UUID is a 16 byte array rather than a byte slice.  One loss due to this
-change is the ability to represent an invalid UUID (vs a NIL UUID).
-
-###### Install
-`go get github.com/google/uuid`
-
-###### Documentation 
-[![GoDoc](https://godoc.org/github.com/google/uuid?status.svg)](http://godoc.org/github.com/google/uuid)
-
-Full `go doc` style documentation for the package can be viewed online without
-installing this package by using the GoDoc site here: 
-http://godoc.org/github.com/google/uuid