fix: sprig dict funcs are failing on dicts nested under arrays (#646)

Fixes #643

.circleci/config.yml

@@ -4,31 +4,51 @@ jobs:
 
   build:
     docker:
-      - image: circleci/golang:1.11.0
-    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:1.11.0
-    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:1.11.0
-    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=v2.11.0
+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="02a4751586d6a80f6848b58e7f6bd6c973ffffadc52b4c06652db7def02773a1"
+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

@@ -1,121 +0,0 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  digest = "1:d9141c149f722217d35834972878499a4781fe5ae46a152e8ac843ff15efc80f"
-  name = "github.com/Masterminds/semver"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "8d82589cda2d7b5b9167396841975c4535c9bec6"
-  version = "v1.4.1"
-
-[[projects]]
-  digest = "1:46a054a232ea2b7f0a35398d682b433d26ba9975fce9197b1784824402059f5b"
-  name = "github.com/Masterminds/sprig"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "6b2a58267f6a8b1dc8e2eb5519b984008fa85e8c"
-  version = "v2.15.0"
-
-[[projects]]
-  digest = "1:8f5416c7f59da8600725ae1ff00a99af1da8b04c211ae6f3c8f8bcab0164f650"
-  name = "github.com/aokoli/goutils"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "3391d3790d23d03408670993e957e8f408993c34"
-  version = "v1.0.1"
-
-[[projects]]
-  digest = "1:8f8811f9be822914c3a25c6a071e93beb4c805d7b026cbf298bc577bc1cc945b"
-  name = "github.com/google/uuid"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "064e2069ce9c359c118179501254f67d7d37ba24"
-  version = "0.2"
-
-[[projects]]
-  digest = "1:6b1e7618931d0ed9a17fec1c1d84271907aa61172c50b8272327f6cd4fafb650"
-  name = "github.com/huandu/xstrings"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "2bf18b218c51864a87384c06996e40ff9dcff8e1"
-  version = "v1.0.0"
-
-[[projects]]
-  digest = "1:8eb1de8112c9924d59bf1d3e5c26f5eaa2bfc2a5fcbb92dc1c2e4546d695f277"
-  name = "github.com/imdario/mergo"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "9f23e2d6bd2a77f959b2bf6acdbefd708a83a4a4"
-  version = "v0.3.6"
-
-[[projects]]
-  digest = "1:55d0f7127962b0657acfd69650634057b3a08958226feee1b64a379666bb915e"
-  name = "github.com/urfave/cli"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "6011f165dc288c72abd8acd7722f837c5c64198d"
-
-[[projects]]
-  digest = "1:3c1a69cdae3501bf75e76d0d86dc6f2b0a7421bc205c0cb7b96b19eed464a34d"
-  name = "go.uber.org/atomic"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "1ea20fb1cbb1cc08cbd0d913a96dead89aa18289"
-  version = "v1.3.2"
-
-[[projects]]
-  digest = "1:60bf2a5e347af463c42ed31a493d817f8a72f102543060ed992754e689805d1a"
-  name = "go.uber.org/multierr"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "3c4937480c32f4c13a875a1829af76c98ca3d40a"
-  version = "v1.1.0"
-
-[[projects]]
-  digest = "1:9580b1b079114140ade8cec957685344d14f00119e0241f6b369633cb346eeb3"
-  name = "go.uber.org/zap"
-  packages = [
-    ".",
-    "buffer",
-    "internal/bufferpool",
-    "internal/color",
-    "internal/exit",
-    "zapcore",
-  ]
-  pruneopts = "UT"
-  revision = "eeedf312bc6c57391d84767a4cd413f02a917974"
-  version = "v1.8.0"
-
-[[projects]]
-  branch = "master"
-  digest = "1:7b1c378a71f617ec07229a1fcbb90b6a5344295823e1d732398f50fd9ae4bbec"
-  name = "golang.org/x/crypto"
-  packages = [
-    "pbkdf2",
-    "scrypt",
-  ]
-  pruneopts = "UT"
-  revision = "b2aa35443fbc700ab74c586ae79b81c171851023"
-
-[[projects]]
-  branch = "v2"
-  digest = "1:342378ac4dcb378a5448dd723f0784ae519383532f5e70ade24132c4c8693202"
-  name = "gopkg.in/yaml.v2"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "5420a8b6744d3b0345ab293f6fcba19c978f1183"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  input-imports = [
-    "github.com/Masterminds/sprig",
-    "github.com/imdario/mergo",
-    "github.com/urfave/cli",
-    "go.uber.org/zap",
-    "go.uber.org/zap/zapcore",
-    "gopkg.in/yaml.v2",
-  ]
-  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 = "0.3.6"

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
 
@@ -29,20 +30,35 @@ To avoid upgrades for each iteration of `helm`, the `helmfile` executable delega
 The default helmfile is `helmfile.yaml`:
 
 ```yaml
+# Chart repositories used from within this state file
+#
+# Use `helm-s3` and `helm-git` and whatever Helm Downloader plugins
+# to use repositories other than the official repository or one backend by chartmuseum.
 repositories:
-  - name: roboll
-    url: http://roboll.io/charts
-    certFile: optional_client_cert
-    keyFile: optional_client_key
-    username: optional_username
-    password: optional_password
+# To use official "stable" charts a.k.a https://github.com/helm/charts/tree/master/stable
+- name: stable
+  url: https://kubernetes-charts.storage.googleapis.com
+# To use official "incubator" charts a.k.a https://github.com/helm/charts/tree/master/incubator
+- name: incubator
+  url: https://kubernetes-charts-incubator.storage.googleapis.com
+# helm-git powered repository: You can treat any Git repository as a charts repository
+- name: polaris
+  url: git+https://github.com/reactiveops/polaris@deploy/helm?ref=master
+# Advanced configuration: You can setup basic or tls auth
+- name: roboll
+  url: http://roboll.io/charts
+  certFile: optional_client_cert
+  keyFile: optional_client_key
+  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 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"
@@ -52,7 +68,18 @@ 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"
 
+# The desired states of Helm releases.
+#
+# Helmfile runs various helm commands to converge the current state in the live cluster to the desired state defined here.
 releases:
   # Published chart example
   - name: vault                            # name of this release
@@ -61,11 +88,21 @@ 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 files used for rendering the chart
     values:
-      # value files passed via --values
+      # Value files passed via --values
       - vault.yaml
-      # inline values, passed via a temporary values file and --values
+      # Inline values, passed via a temporary values file and --values, so that it doesn't suffer from type issues like --set
       - address: https://vault.example.com
+      # Go template available in inline values and values files.
+      - image:
+          # The end result is more or less YAML. So do `quote` to prevent number-like strings from accidentally parsed into numbers!
+          # See https://github.com/roboll/helmfile/issues/608
+          tag: {{ requiredEnv "IMAGE_TAG" | quote }}
+          # Otherwise:
+          #   tag: "{{ requiredEnv "IMAGE_TAG" }}"
+          #   tag: !!string {{ requiredEnv "IMAGE_TAG" }}
         db:
           username: {{ requiredEnv "DB_USERNAME" }}
           # value taken from environment variable. Quotes are necessary. Will throw an error if the environment variable is not set. $DB_PASSWORD needs to be set in the calling environment ex: export DB_PASSWORD='password1'
@@ -74,6 +111,8 @@ releases:
           # Interpolate environment variable with a fixed string
           domain: {{ requiredEnv "PLATFORM_ID" }}.my-domain.com
           scheme: {{ env "SCHEME" | default "https" }}
+    # Use `values` whenever possible!
+    # `set` translates to helm's `--set key=val`, that is known to suffer from type issues like https://github.com/roboll/helmfile/issues/608
     set:
     # single value loaded from a local file, translates to --set-file foo.config=path/to/file
     - name: foo.config
@@ -89,6 +128,8 @@ releases:
     # will attempt to decrypt it using helm-secrets plugin
     secrets:
       - vault_secret.yaml
+    # verify the chart before upgrading (only works with packaged charts not directories)
+    verify: true
     # wait for k8s resources via --wait. Defaults to `false`
     wait: true
     # time in seconds to wait for any individual Kubernetes operation (like Jobs for hooks, and waits on pod/pvc/svc/deployment readiness) (default 300)
@@ -99,16 +140,100 @@ releases:
     force: true
     # set `false` to uninstall on sync
     installed: true
+    # restores previous state in case of failed release
+    atomic: true
+    # name of the tiller namespace
+    tillerNamespace: vault
+    # if true, will use the helm-tiller plugin
+    tillerless: false
+    # enable TLS for request to Tiller
+    tls: true
+    # path to TLS CA certificate file (default "$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.
     wait: true
 
+#
+# Advanced Configuration: Nested States
+#
+helmfiles:
+- # Path to the helmfile state file being processed BEFORE releases in this state file
+  path: path/to/subhelmfile.yaml
+  # Label selector used for filtering releases in the nested state.
+  # For example, `name=prometheus` in this context is equivalent to processing the nested state like
+  #   helmfile -f path/to/subhelmfile.yaml -l name=prometheus sync
+  selectors:
+  - name=prometheus
+  # Override state values
+  values:
+  # Values files merged into the nested state's values
+  - additiona.values.yaml
+  # Inline state values merged into the nested state's values
+  - key1: val1
+- # All the nested state files under `helmfiles:` is processed in the order of definition.
+  # So it can be used for preparation for your main `releases`. An example would be creating CRDs required by `reelases` in the parent state file. 
+  path: path/to/mycrd.helmfile.yaml
+
+#
+# Advanced Configuration: Environments
+#
+
+# The list of environments managed by helmfile.
+#
+# The default is `environments: {"default": {}}` which implies:
+#
+# - `{{ .Environment.Name }}` evaluates to "default"
+# - `{{ .Environment.Values }}` being empty
+environments:
+  # The "default" environment is available and used when `helmfile` is run without `--environment NAME`.
+  default:
+    # Everything from the values.yaml is available via `{{ .Environment.Values.KEY }}`.
+    # Suppose `{"foo": {"bar": 1}}` contained in the values.yaml below,
+    # `{{ .Environment.Values.foo.bar }}` is evaluated to `1`.
+    values:
+    - environments/default/values.yaml
+    # Each entry in values can be either a file path or inline values.
+    # The below is an example of inline values, which is merged to the `.Environment.Values`
+    - myChartVer: 1.0.0-dev
+  # Any environment other than `default` is used only when `helmfile` is run with `--environment NAME`.
+  # That is, the "production" env below is used when and only when it is run like `helmfile --environment production sync`.
+  production:
+    values:
+    - environment/production/values.yaml
+    - myChartVer: 1.0.0
+    ## `secrets.yaml` is decrypted by `helm-secrets` and available via `{{ .Environment.Secrets.KEY }}`
+    secrets:
+    - environment/production/secrets.yaml
+    # Instructs helmfile to fail when unable to find a environment values file listed under `environments.NAME.values`.
+    #
+    # Possible values are  "Error", "Warn", "Info", "Debug". The default is "Error".
+    #
+    # Use "Warn", "Info", or "Debug" if you want helmfile to not fail when a values file is missing, while just leaving
+    # a message about the missing file at the log-level.
+    missingFileHandler: Error
+
+#
+# Advanced Configuration: Layering
+#
+# Helmfile merges all the "base" state files and this state file before processing.
+#
+# Assuming this state file is named `helmfile.yaml`, all the files are merged in the order of:
+#   environments.yaml <- defaults.yaml <- templates.yaml <- helmfile.yaml
+bases:
+- environments.yaml
+- defaults.yaml
+- templates.yaml
 ```
 
 ## Templating
@@ -126,7 +251,7 @@ 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/
 ```
@@ -149,10 +274,11 @@ 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
 
@@ -178,7 +304,11 @@ 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
 
@@ -189,22 +319,29 @@ NAME:
 USAGE:
    helmfile [global options] command [command options] [arguments...]
 
+VERSION:
+   v0.70.0
+
 COMMANDS:
+     deps      update charts based on the contents of requirements.yaml
      repos     sync repositories from state file (helm repo add && helm repo update)
-     charts    sync releases from state file (helm upgrade --install)
+     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    delete releases from state file (helm delete)
+     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
+   --state-values-set value                set state values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)
+   --state-values-file value               specify state values in a YAML file
    --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
@@ -213,6 +350,7 @@ GLOBAL OPTIONS:
                                            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
+   --allow-no-matching-release             Do not exit with an error code if the provided selector has no matching releases.
    --interactive, -i                       Request confirmation before attempting to modify clusters
    --help, -h                              show help
    --version, -v                           print the version
@@ -227,6 +365,20 @@ dependencies of any referenced local charts.
 
 For Helm 2.9+ you can use a username and password to authenticate to a remote repository.
 
+### deps
+
+The `helmfile deps` sub-command locks your helmfile state and local charts dependencies.
+
+It basically runs `helm dependency update` on your helmfile state file and all the referenced local charts, so that you get a "lock" file per each helmfile state or local chart.
+
+All the other `helmfile` sub-commands like `sync` use chart versions recorded in the lock files, so that e.g. untested chart versions won't suddenly get deployed to the production environment.
+
+For example, the lock file for a helmfile state file named `helmfile.1.yaml` will be `helmfile.1.lock`. The lock file for a local chart would be `requirements.lock`, which is the same as `helm`.
+
+It is recommended to version-control all the lock files, so that they can be used in the production deployment pipeline for extra reproducibility.
+
+To bring in chart updates systematically, it would also be a good idea to run `helmfile deps` regularly, test it, and then update the lock files in the version-control system.
+
 ### diff
 
 The `helmfile diff` sub-command executes the [helm-diff](https://github.com/databus23/helm-diff) plugin across all of
@@ -242,7 +394,15 @@ The `helmfile apply` sub-command begins by executing `diff`. If `diff` finds tha
 
 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 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.
 
@@ -250,6 +410,7 @@ The `helmfile delete` sub-command deletes all the releases defined in the manife
 
 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`.
 
+
 ### secrets
 
 The `secrets` parameter in a `helmfile.yaml` causes the [helm-secrets](https://github.com/futuresimple/helm-secrets) plugin to be executed to decrypt the file.
@@ -290,6 +451,8 @@ 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.gotmpl` (templated helm values files). `values.yaml` references will be used verbatim. In other words:
@@ -488,8 +651,8 @@ Environment Secrets (not to be confused with Kubernetes Secrets) are encrypted v
 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.
 
-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 
+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`:
@@ -519,6 +682,16 @@ Then the environment secret `foo.bar` can be referenced by the below template ex
 {{ .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
 
 Once your `helmfile.yaml` got to contain too many releases,
@@ -589,6 +762,30 @@ 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
@@ -624,12 +821,18 @@ Once `events` are triggered, associated `hooks` are executed, by running the `co
 Currently supported `events` are:
 
 - `prepare`
+- `presync`
+- `postsync`
 - `cleanup`
 
 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`.
+
+Hooks associated to `postsync` events are triggered after 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:
 
 ```
@@ -721,6 +924,12 @@ Use the [Helmfile Best Practices Guide](/docs/writing-helmfile.md) to write adva
 - 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:
@@ -733,7 +942,7 @@ Please see #203 for more context.
 
 ## Running helmfile interactively
 
-`helmfile --interactive [apply|delete]` requests confirmation from you before actually modifying your cluster.
+`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.
 
@@ -745,7 +954,19 @@ Once you download all required charts into your machine, you can run `helmfile c
 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!

app_test.go

@@ -1,474 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"github.com/roboll/helmfile/helmexec"
-	"github.com/roboll/helmfile/state"
-	"io/ioutil"
-	"os"
-	"path/filepath"
-	"reflect"
-	"testing"
-)
-
-// See https://github.com/roboll/helmfile/issues/193
-func TestVisitDesiredStatesWithReleasesFiltered(t *testing.T) {
-	absPaths := map[string]string{
-		".":                   "/path/to",
-		"/path/to/helmfile.d": "/path/to/helmfile.d",
-	}
-	dirs := map[string]bool{
-		"helmfile.d": true,
-	}
-	files := map[string]string{
-		"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
-`,
-	}
-	globMatches := map[string][]string{
-		"/path/to/helmfile.d/a*.yaml": []string{"/path/to/helmfile.d/a1.yaml", "/path/to/helmfile.d/a2.yaml"},
-		"/path/to/helmfile.d/b*.yaml": []string{"/path/to/helmfile.d/b.yaml"},
-	}
-	fileExistsAt := func(path string) bool {
-		_, ok := files[path]
-		return ok
-	}
-	directoryExistsAt := func(path string) bool {
-		_, ok := dirs[path]
-		return ok
-	}
-	readFile := func(filename string) ([]byte, error) {
-		str, ok := files[filename]
-		if !ok {
-			return []byte(nil), fmt.Errorf("no file found: %s", filename)
-		}
-		return []byte(str), nil
-	}
-	glob := func(pattern string) ([]string, error) {
-		matches, ok := globMatches[pattern]
-		if !ok {
-			return []string(nil), fmt.Errorf("no file matched: %s", pattern)
-		}
-		return matches, nil
-	}
-	abs := func(path string) (string, error) {
-		a, ok := absPaths[path]
-		if !ok {
-			return "", fmt.Errorf("abs: unexpected path: %s", path)
-		}
-		return a, nil
-	}
-	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 := &app{
-			readFile:          readFile,
-			glob:              glob,
-			abs:               abs,
-			fileExistsAt:      fileExistsAt,
-			directoryExistsAt: directoryExistsAt,
-			kubeContext:       "default",
-			logger:            helmexec.NewLogger(os.Stderr, "debug"),
-			selectors:         []string{fmt.Sprintf("name=%s", testcase.name)},
-			namespace:         "",
-			env:               "default",
-		}
-		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) {
-	absPaths := map[string]string{
-		".":                   "/path/to",
-		"/path/to/helmfile.d": "/path/to/helmfile.d",
-	}
-	dirs := map[string]bool{
-		"helmfile.d": true,
-	}
-	files := map[string]string{
-		"helmfile.yaml": `
-environments:
-  prod:
-
-helmfiles:
-- helmfile.d/a*.yaml
-`,
-		"/path/to/helmfile.d/a1.yaml": `
-environments:
-  prod:
-
-releases:
-- name: zipkin
-  chart: stable/zipkin
-`,
-	}
-	globMatches := map[string][]string{
-		"/path/to/helmfile.d/a*.yaml": []string{"/path/to/helmfile.d/a1.yaml"},
-	}
-	fileExistsAt := func(path string) bool {
-		_, ok := files[path]
-		return ok
-	}
-	directoryExistsAt := func(path string) bool {
-		_, ok := dirs[path]
-		return ok
-	}
-	readFile := func(filename string) ([]byte, error) {
-		str, ok := files[filename]
-		if !ok {
-			return []byte(nil), fmt.Errorf("no file found: %s", filename)
-		}
-		return []byte(str), nil
-	}
-	glob := func(pattern string) ([]string, error) {
-		matches, ok := globMatches[pattern]
-		if !ok {
-			return []string(nil), fmt.Errorf("no file matched: %s", pattern)
-		}
-		return matches, nil
-	}
-	abs := func(path string) (string, error) {
-		a, ok := absPaths[path]
-		if !ok {
-			return "", fmt.Errorf("abs: unexpected path: %s", path)
-		}
-		return a, nil
-	}
-	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 := &app{
-			readFile:          readFile,
-			glob:              glob,
-			abs:               abs,
-			fileExistsAt:      fileExistsAt,
-			directoryExistsAt: directoryExistsAt,
-			kubeContext:       "default",
-			logger:            helmexec.NewLogger(os.Stderr, "debug"),
-			namespace:         "",
-			selectors:         []string{},
-			env:               testcase.name,
-		}
-		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) {
-	absPaths := map[string]string{
-		".":                   "/path/to",
-		"/path/to/helmfile.d": "/path/to/helmfile.d",
-	}
-	dirs := map[string]bool{
-		"helmfile.d": true,
-	}
-	files := map[string]string{
-		"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
-- name: foo
-  chart: charts/foo
-  labels:
-    duplicated: yes
-- name: foo
-  chart: charts/foo
-  labels:
-    duplicated: yes
-`,
-	}
-	globMatches := map[string][]string{
-		"/path/to/helmfile.d/a*.yaml": []string{"/path/to/helmfile.d/a1.yaml", "/path/to/helmfile.d/a2.yaml"},
-		"/path/to/helmfile.d/b*.yaml": []string{"/path/to/helmfile.d/b.yaml"},
-	}
-	fileExistsAt := func(path string) bool {
-		_, ok := files[path]
-		return ok
-	}
-	directoryExistsAt := func(path string) bool {
-		_, ok := dirs[path]
-		return ok
-	}
-	readFile := func(filename string) ([]byte, error) {
-		str, ok := files[filename]
-		if !ok {
-			return []byte(nil), fmt.Errorf("no file found: %s", filename)
-		}
-		return []byte(str), nil
-	}
-	glob := func(pattern string) ([]string, error) {
-		matches, ok := globMatches[pattern]
-		if !ok {
-			return []string(nil), fmt.Errorf("no file matched: %s", pattern)
-		}
-		return matches, nil
-	}
-	abs := func(path string) (string, error) {
-		a, ok := absPaths[path]
-		if !ok {
-			return "", fmt.Errorf("abs: unexpected path: %s", path)
-		}
-		return a, nil
-	}
-
-	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: there were 2 releases named \"foo\" matching specified selector"},
-	}
-
-	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 := &app{
-			readFile:          readFile,
-			glob:              glob,
-			abs:               abs,
-			fileExistsAt:      fileExistsAt,
-			directoryExistsAt: directoryExistsAt,
-			kubeContext:       "default",
-			logger:            helmexec.NewLogger(os.Stderr, "debug"),
-			namespace:         "",
-			selectors:         []string{testcase.label},
-			env:               "default",
-		}
-
-		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))
-		}
-	}
-}
-
-// See https://github.com/roboll/helmfile/issues/312
-func TestVisitDesiredStatesWithReleasesFiltered_ReverseOrder(t *testing.T) {
-	absPaths := map[string]string{
-		".":                   "/path/to",
-		"/path/to/helmfile.d": "/path/to/helmfile.d",
-	}
-	dirs := map[string]bool{
-		"helmfile.d": true,
-	}
-	files := map[string]string{
-		"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
-`,
-	}
-	globMatches := map[string][]string{
-		"/path/to/helmfile.d/a*.yaml": []string{"/path/to/helmfile.d/a1.yaml", "/path/to/helmfile.d/a2.yaml"},
-		"/path/to/helmfile.d/b*.yaml": []string{"/path/to/helmfile.d/b.yaml"},
-	}
-	fileExistsAt := func(path string) bool {
-		_, ok := files[path]
-		return ok
-	}
-	directoryExistsAt := func(path string) bool {
-		_, ok := dirs[path]
-		return ok
-	}
-	readFile := func(filename string) ([]byte, error) {
-		str, ok := files[filename]
-		if !ok {
-			return []byte(nil), fmt.Errorf("no file found: %s", filename)
-		}
-		return []byte(str), nil
-	}
-	glob := func(pattern string) ([]string, error) {
-		matches, ok := globMatches[pattern]
-		if !ok {
-			return []string(nil), fmt.Errorf("no file matched: %s", pattern)
-		}
-		return matches, nil
-	}
-	abs := func(path string) (string, error) {
-		a, ok := absPaths[path]
-		if !ok {
-			return "", fmt.Errorf("abs: unexpected path: %s", path)
-		}
-		return a, nil
-	}
-
-	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 := &app{
-			readFile:          readFile,
-			glob:              glob,
-			abs:               abs,
-			fileExistsAt:      fileExistsAt,
-			directoryExistsAt: directoryExistsAt,
-			kubeContext:       "default",
-			logger:            helmexec.NewLogger(os.Stderr, "debug"),
-			reverse:           testcase.reverse,
-			namespace:         "",
-			selectors:         []string{},
-			env:               "default",
-		}
-		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:      logger,
-	}
-	_, err := app.loadDesiredStateFromYaml(yamlContent, yamlFile, "default", "default")
-	if err != nil {
-		t.Error("unexpected error")
-	}
-}

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

@@ -30,19 +30,82 @@ If you want a kind of default values that is used when a missing key was referen
 
 Now, you get `1` when there is no `eventApi.replicas` defined in environment values.
 
-## Layering
+## 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 State Files
+
+> See **Layering State Template Files** if you're layering templates.
 
 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 te common parts into a dedicated *library helmfile*s, so that each helmfile becomes DRY.
+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" }}
----
+bases:
+- commons.yaml
+- environments.yaml
+
 releases:
 - name: myapp
   chart: mychart
@@ -64,23 +127,26 @@ environments:
   production:
 ```
 
-At run time, template expressions in your `helmfile.yaml` are executed:
+At run time, `bases` in your `helmfile.yaml` are evaluated to produce:
 
 ```yaml
+# commons.yaml
 releases:
 - name: metricbaet
   chart: stable/metricbeat
 ---
+# environments.yaml
 environments:
   development:
   production:
 ---
+# helmfile.yaml
 releases:
 - name: myapp
   chart: mychart
 ```
 
-Resulting YAML documents are merged in the order of occurrence,
+Finally the resulting YAML documents are merged in the order of occurrence,
 so that your `helmfile.yaml` becomes:
 
 ```yaml
@@ -98,3 +164,119 @@ releases:
 Great!
 
 Now, repeat the above steps for each your `helmfile.yaml`, so that all your helmfiles becomes DRY.
+
+Please also see [the discussion in the issue 388](https://github.com/roboll/helmfile/issues/388#issuecomment-491710348) for more advanced layering examples.
+
+## Layering State Template Files
+
+Do you need to make your state file even more DRY?
+
+Turned out layering state files wasn't enough for you?
+
+Helmfile supports an advanced feature that allows you to compose state "template" files to generate the final state to be processed.
+
+In the following example `helmfile.yaml.gotmpl`, each `---` separated part of the file is a go template.
+
+`helmfile.yaml.gotmpl`:
+
+```yaml
+# Part 1: Reused Enviroment Values
+bases:
+  - myenv.yaml
+---
+# Part 2: Reused Defaults
+bases:
+  - mydefaults.yaml
+---
+# Part 3: Dynamic Releases
+releases:
+  - name: test1
+    chart: mychart-{{ .Environment.Values.myname }}
+    values:
+      replicaCount: 1
+      image:
+        repository: "nginx"
+        tag: "latest"
+```
+
+Suppose the `myenv.yaml` and `test.env.yaml` loaded in the first part looks like:
+
+`myenv.yaml`:
+
+```yaml
+environments:
+  test:
+    values:
+      - test.env.yaml
+```
+
+`test.env.yaml`:
+
+```yaml
+kubeContext: test
+wait: false
+cvOnly: false
+myname: "dog"
+```
+
+Where the gotmpl file loaded in the second part looks like:
+
+`mydefaults.yaml.gotmpl`:
+
+```yaml
+helmDefaults:
+  tillerNamespace: kube-system
+  kubeContext: {{ .Environment.Values.kubeContext }}
+  verify: false
+  {{ if .Environment.Values.wait }}
+  wait: true
+  {{ else }}
+  wait: false
+  {{ end }}
+  timeout: 600
+  recreatePods: false
+  force: true
+```
+
+Each go template is rendered in the context where `.Environment.Values` is inherited from the previous part. 
+
+So in `mydefaults.yaml.gotmpl`, both `.Environment.Values.kubeContext` and `.Environment.Values.wait` are valid as they do exist in the environment values inherited from the previous part(=the first part) of your `helmfile.yaml.gotmpl`, and therefore the template is rendered to:
+
+```yaml
+helmDefaults:
+  tillerNamespace: kube-system
+  kubeContext: test
+  verify: false
+  wait: false
+  timeout: 600
+  recreatePods: false
+  force: true
+```
+
+Similarly, the third part of the top-level `helmfile.yaml.gotmpl`, `.Environment.Values.myname` is valid as it is included in the environment values inherited from the previous parts:
+
+```yaml
+# Part 3: Dynamic Releases
+releases:
+  - name: test1
+    chart: mychart-{{ .Environment.Values.myname }}
+    values:
+      replicaCount: 1
+      image:
+        repository: "nginx"
+        tag: "latest"
+````
+
+hence rendered to:
+
+```yaml
+# Part 3: Dynamic Releases
+releases:
+  - name: test1
+    chart: mychart-dog
+    values:
+      replicaCount: 1
+      image:
+        repository: "nginx"
+        tag: "latest"
+```

environment/environment.go

@@ -1,8 +0,0 @@
-package environment
-
-type Environment struct {
-	Name   string
-	Values map[string]interface{}
-}
-
-var EmptyEnvironment Environment

go.mod

@@ -0,0 +1,23 @@
+module github.com/roboll/helmfile
+
+go 1.12
+
+require (
+	github.com/Masterminds/semver v1.4.1
+	github.com/Masterminds/sprig v2.16.0+incompatible
+	github.com/aokoli/goutils v1.0.1 // indirect
+	github.com/google/go-cmp v0.3.0
+	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 +1,37 @@
+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/Masterminds/sprig v2.16.0+incompatible h1:QZbMUPxRQ50EKAq3LFMnxddMu88/EUUG3qmxwtDmPsY=
+github.com/Masterminds/sprig v2.16.0+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/helmexec.go

@@ -1,21 +0,0 @@
-package helmexec
-
-// Interface for executing helm commands
-type Interface interface {
-	SetExtraArgs(args ...string)
-	SetHelmBinary(bin string)
-
-	AddRepo(name, repository, certfile, keyfile, username, password string) error
-	UpdateRepo() error
-	UpdateDeps(chart string) error
-	SyncRelease(name, chart string, flags ...string) error
-	DiffRelease(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)
-}

helmexec/runner.go

@@ -1,27 +0,0 @@
-package helmexec
-
-import (
-	"os/exec"
-)
-
-const (
-	tmpPrefix = "helmfile-"
-	tmpSuffix = "-exec"
-)
-
-// Runner interface for shell commands
-type Runner interface {
-	Execute(cmd string, args []string) ([]byte, error)
-}
-
-// ShellRunner implemention for shell commands
-type ShellRunner struct {
-	Dir string
-}
-
-// Execute a shell command
-func (shell ShellRunner) Execute(cmd string, args []string) ([]byte, error) {
-	preparedCmd := exec.Command(cmd, args...)
-	preparedCmd.Dir = shell.Dir
-	return preparedCmd.CombinedOutput()
-}

pkg/app/app.go

@@ -0,0 +1,602 @@
+package app
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/pkg/helmexec"
+	"github.com/roboll/helmfile/pkg/state"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+
+	"go.uber.org/zap"
+
+	"path/filepath"
+	"sort"
+)
+
+type App struct {
+	KubeContext string
+	Logger      *zap.SugaredLogger
+	Reverse     bool
+	Env         string
+	Namespace   string
+	Selectors   []string
+	HelmBinary  string
+	Args        string
+	ValuesFiles []string
+	Set         map[string]interface{}
+
+	FileOrDir string
+
+	ErrorHandler func(error) error
+
+	readFile          func(string) ([]byte, error)
+	fileExists        func(string) (bool, 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 New(conf ConfigProvider) *App {
+	return Init(&App{
+		KubeContext: conf.KubeContext(),
+		Logger:      conf.Logger(),
+		Env:         conf.Env(),
+		Namespace:   conf.Namespace(),
+		Selectors:   conf.Selectors(),
+		HelmBinary:  conf.HelmBinary(),
+		Args:        conf.Args(),
+		FileOrDir:   conf.FileOrDir(),
+		ValuesFiles: conf.ValuesFiles(),
+		Set:         conf.Set(),
+	})
+}
+
+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.fileExists = fileExists
+	app.directoryExistsAt = directoryExistsAt
+	return app
+}
+
+func (a *App) Deps(c DepsConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.Deps(c)
+	})
+}
+
+func (a *App) Repos(c ReposConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.Repos(c)
+	})
+}
+
+func (a *App) reverse() *App {
+	new := *a
+	new.Reverse = true
+	return &new
+}
+
+func (a *App) DeprecatedSyncCharts(c DeprecatedChartsConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.DeprecatedSyncCharts(c)
+	})
+}
+
+func (a *App) Diff(c DiffConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.Diff(c)
+	})
+}
+
+func (a *App) Template(c TemplateConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.Template(c)
+	})
+}
+
+func (a *App) Lint(c LintConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.Lint(c)
+	})
+}
+
+func (a *App) Sync(c SyncConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.Sync(c)
+	})
+}
+
+func (a *App) Apply(c ApplyConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.Apply(c)
+	})
+}
+
+func (a *App) Status(c StatusesConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.Status(c)
+	})
+}
+
+func (a *App) Delete(c DeleteConfigProvider) error {
+	return a.reverse().ForEachState(func(run *Run) []error {
+		return run.Delete(c)
+	})
+}
+
+func (a *App) Destroy(c DestroyConfigProvider) error {
+	return a.reverse().ForEachState(func(run *Run) []error {
+		return run.Destroy(c)
+	})
+}
+
+func (a *App) Test(c TestConfigProvider) error {
+	return a.ForEachState(func(run *Run) []error {
+		return run.Test(c)
+	})
+}
+
+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, string) error) error {
+	desiredStateFiles, err := a.findDesiredStateFiles(fileOrDir)
+	if err != nil {
+		return appError("", 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 {
+			absd, err := a.abs(dir)
+			if err != nil {
+				return err
+			}
+
+			return do(file, absd)
+		})
+		if err != nil {
+			return appError(fmt.Sprintf("in %s/%s", dir, file), err)
+		}
+	}
+
+	return nil
+}
+
+func (a *App) loadDesiredStateFromYaml(file string, opts ...LoadOpts) (*state.HelmState, error) {
+	ld := &desiredStateLoader{
+		readFile:   a.readFile,
+		fileExists: a.fileExists,
+		env:        a.Env,
+		namespace:  a.Namespace,
+		logger:     a.Logger,
+		abs:        a.abs,
+
+		Reverse:     a.Reverse,
+		KubeContext: a.KubeContext,
+		glob:        a.glob,
+	}
+
+	var op LoadOpts
+	if len(opts) > 0 {
+		op = opts[0]
+	}
+
+	return ld.Load(file, op)
+}
+
+func (a *App) visitStates(fileOrDir string, defOpts LoadOpts, converge func(*state.HelmState, helmexec.Interface) (bool, []error)) error {
+	noMatchInHelmfiles := true
+
+	err := a.visitStateFiles(fileOrDir, func(f, d string) error {
+		opts := defOpts.DeepCopy()
+
+		if opts.CalleePath == "" {
+			opts.CalleePath = f
+		}
+
+		st, err := a.loadDesiredStateFromYaml(f, opts)
+
+		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)}
+			_ = context{a, st}.clean(errs)
+			// See http://tldp.org/LDP/abs/html/exitcodes.html
+			switch sig {
+			case syscall.SIGINT:
+				os.Exit(130)
+			case syscall.SIGTERM:
+				os.Exit(143)
+			}
+		}()
+
+		ctx := context{a, st}
+
+		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 ctx.wrapErrs(err)
+				}
+			default:
+				return ctx.wrapErrs(err)
+			}
+		}
+		st.Selectors = opts.Selectors
+
+		if len(st.Helmfiles) > 0 {
+			noMatchInSubHelmfiles := true
+			for i, m := range st.Helmfiles {
+				optsForNestedState := LoadOpts{
+					CalleePath:  filepath.Join(d, f),
+					Environment: m.Environment,
+				}
+				//assign parent selector to sub helm selector in legacy mode or do not inherit in experimental mode
+				if (m.Selectors == nil && !isExplicitSelectorInheritanceEnabled()) || m.SelectorsInherited {
+					optsForNestedState.Selectors = opts.Selectors
+				} else {
+					optsForNestedState.Selectors = m.Selectors
+				}
+				if err := a.visitStates(m.Path, optsForNestedState, converge); err != nil {
+					switch err.(type) {
+					case *NoMatchingHelmfileError:
+
+					default:
+						return appError(fmt.Sprintf("in .helmfiles[%d]", i), err)
+					}
+				} else {
+					noMatchInSubHelmfiles = false
+				}
+			}
+			noMatchInHelmfiles = noMatchInHelmfiles && noMatchInSubHelmfiles
+		}
+
+		templated, tmplErr := st.ExecuteTemplates()
+		if tmplErr != nil {
+			return appError(fmt.Sprintf("failed executing release templates in \"%s\"", f), tmplErr)
+		}
+		processed, errs := converge(templated, helm)
+		noMatchInHelmfiles = noMatchInHelmfiles && !processed
+		return context{a, templated}.clean(errs)
+	})
+
+	if err != nil {
+		return err
+	}
+
+	if noMatchInHelmfiles {
+		return &NoMatchingHelmfileError{selectors: a.Selectors, env: a.Env}
+	}
+
+	return nil
+}
+
+func (a *App) ForEachState(do func(*Run) []error) error {
+	err := a.VisitDesiredStatesWithReleasesFiltered(a.FileOrDir, func(st *state.HelmState, helm helmexec.Interface) []error {
+		ctx := NewContext()
+
+		run := NewRun(st, helm, ctx)
+
+		return do(run)
+	})
+
+	if err != nil && a.ErrorHandler != nil {
+		return a.ErrorHandler(err)
+	}
+
+	return err
+}
+
+func (a *App) VisitDesiredStatesWithReleasesFiltered(fileOrDir string, converge func(*state.HelmState, helmexec.Interface) []error) error {
+	opts := LoadOpts{
+		Selectors: a.Selectors,
+	}
+
+	envvals := []interface{}{}
+
+	if a.ValuesFiles != nil {
+		for i := range a.ValuesFiles {
+			envvals = append(envvals, a.ValuesFiles[i])
+		}
+	}
+
+	if a.Set != nil {
+		envvals = append(envvals, a.Set)
+	}
+
+	if len(envvals) > 0 {
+		opts.Environment.OverrideValues = envvals
+	}
+
+	err := a.visitStates(fileOrDir, opts, func(st *state.HelmState, helm helmexec.Interface) (bool, []error) {
+		if len(st.Selectors) > 0 {
+			err := st.FilterReleases()
+			if err != nil {
+				return false, []error{err}
+			}
+		}
+
+		if a.HelmBinary != "" {
+			helm.SetHelmBinary(a.HelmBinary)
+		}
+
+		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 fileExists(path string) (bool, error) {
+	_, err := os.Stat(path)
+
+	if err != nil {
+		if os.IsNotExist(err) {
+			return false, nil
+		}
+		return false, err
+	}
+	return true, nil
+}
+
+func directoryExistsAt(path string) bool {
+	fileInfo, err := os.Stat(path)
+	return err == nil && fileInfo.Mode().IsDir()
+}
+
+type Error struct {
+	msg string
+
+	Errors []error
+}
+
+func (e *Error) Error() string {
+	var cause string
+	if e.Errors == nil {
+		return e.msg
+	}
+	if len(e.Errors) == 1 {
+		if e.Errors[0] == nil {
+			panic(fmt.Sprintf("[bug] assertion error: unexpected state: e.Errors: %v", e.Errors))
+		}
+		cause = e.Errors[0].Error()
+	} else {
+		msgs := []string{}
+		for i, err := range e.Errors {
+			if err == nil {
+				continue
+			}
+			msgs = append(msgs, fmt.Sprintf("err %d: %v", i, err.Error()))
+		}
+		cause = fmt.Sprintf("%d errors:\n%s", len(e.Errors), strings.Join(msgs, "\n"))
+	}
+	msg := ""
+	if e.msg != "" {
+		msg = fmt.Sprintf("%s: %s", e.msg, cause)
+	} else {
+		msg = cause
+	}
+	return msg
+}
+
+func (e *Error) Code() int {
+	allDiff := false
+	anyNonZero := false
+	for _, err := range e.Errors {
+		switch ee := err.(type) {
+		case *state.ReleaseError:
+			if anyNonZero {
+				allDiff = allDiff && ee.Code == 2
+			} else {
+				allDiff = ee.Code == 2
+			}
+		case *Error:
+			if anyNonZero {
+				allDiff = allDiff && ee.Code() == 2
+			} else {
+				allDiff = ee.Code() == 2
+			}
+		}
+		anyNonZero = true
+	}
+
+	if anyNonZero {
+		if allDiff {
+			return 2
+		}
+		return 1
+	}
+	panic(fmt.Sprintf("[bug] assertion error: unexpected state: unable to handle errors: %v", e.Errors))
+}
+
+func appError(msg string, err error) error {
+	return &Error{msg, []error{err}}
+}
+
+func (c context) clean(errs []error) error {
+	if errs == nil {
+		errs = []error{}
+	}
+
+	cleanErrs := c.st.Clean()
+	if cleanErrs != nil {
+		errs = append(errs, cleanErrs...)
+	}
+
+	return c.wrapErrs(errs...)
+}
+
+type context struct {
+	app *App
+	st  *state.HelmState
+}
+
+func (c context) wrapErrs(errs ...error) error {
+	if errs != nil && len(errs) > 0 {
+		for _, err := range errs {
+			switch e := err.(type) {
+			case *state.ReleaseError:
+				c.app.Logger.Debugf("err: release \"%s\" in \"%s\" failed: %v", e.Name, c.st.FilePath, e)
+			default:
+				c.app.Logger.Debugf("err: %v", e)
+			}
+		}
+		return &Error{Errors: errs}
+	}
+	return nil
+}

pkg/app/ask.go

@@ -1,4 +1,4 @@
-package main
+package app
 
 import (
 	"bufio"
@@ -11,7 +11,7 @@ import (
 // Copyright (c) 2017 Roland Singer [roland.singer@desertbit.com]
 //
 // Shamelessly borrowed from @r0l1's awesome work that is available at https://gist.github.com/r0l1/3dcbb0c8f6cfe9c66ab8008f55f8f28b
-func askForConfirmation(s string) bool {
+func AskForConfirmation(s string) bool {
 	reader := bufio.NewReader(os.Stdin)
 
 	for {

pkg/app/config.go

@@ -0,0 +1,130 @@
+package app
+
+import "go.uber.org/zap"
+
+type ConfigProvider interface {
+	Args() string
+	HelmBinary() string
+
+	FileOrDir() string
+	KubeContext() string
+	Namespace() string
+	Selectors() []string
+	Set() map[string]interface{}
+	ValuesFiles() []string
+	Env() string
+
+	loggingConfig
+}
+
+type DeprecatedChartsConfigProvider interface {
+	Values() []string
+
+	concurrencyConfig
+	loggingConfig
+}
+
+type DepsConfigProvider interface {
+	Args() string
+}
+
+type ReposConfigProvider interface {
+	Args() string
+}
+
+type ApplyConfigProvider interface {
+	Args() string
+
+	Values() []string
+	SkipDeps() bool
+
+	SuppressSecrets() bool
+
+	concurrencyConfig
+	interactive
+	loggingConfig
+}
+
+type SyncConfigProvider interface {
+	Args() string
+
+	Values() []string
+	SkipDeps() bool
+
+	concurrencyConfig
+	loggingConfig
+}
+
+type DiffConfigProvider interface {
+	Args() string
+
+	Values() []string
+	SkipDeps() bool
+
+	SuppressSecrets() bool
+
+	DetailedExitcode() bool
+
+	concurrencyConfig
+}
+
+type DeleteConfigProvider interface {
+	Args() string
+
+	Purge() bool
+
+	interactive
+	loggingConfig
+}
+
+type DestroyConfigProvider interface {
+	Args() string
+
+	interactive
+	loggingConfig
+}
+
+type TestConfigProvider interface {
+	Args() string
+
+	Timeout() int
+	Cleanup() bool
+
+	concurrencyConfig
+}
+
+type LintConfigProvider interface {
+	Args() string
+
+	Values() []string
+	SkipDeps() bool
+
+	concurrencyConfig
+}
+
+type TemplateConfigProvider interface {
+	Args() string
+
+	Values() []string
+	SkipDeps() bool
+
+	concurrencyConfig
+}
+
+type StatusesConfigProvider interface {
+	Args() string
+
+	concurrencyConfig
+}
+
+type concurrencyConfig interface {
+	Concurrency() int
+}
+
+type loggingConfig interface {
+	Logger() *zap.SugaredLogger
+}
+
+type interactive interface {
+	Interactive() bool
+}

pkg/app/constants.go

@@ -0,0 +1,22 @@
+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 experimentalModeEnabled() bool {
+	return os.Getenv(ExperimentalEnvVar) == "true"
+}
+
+func isExplicitSelectorInheritanceEnabled() bool {
+	return experimentalModeEnabled() || 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.Assert(t, is.Equal(os.Getenv(ExperimentalEnvVar), ""))
+	assert.Check(t, !isExplicitSelectorInheritanceEnabled())
+
+	//check for env var ExperimentalEnvVar set to true
+	defer env.Patch(t, ExperimentalEnvVar, "true")()
+	assert.Check(t, isExplicitSelectorInheritanceEnabled())
+
+	//check for env var ExperimentalEnvVar set to anything
+	defer env.Patch(t, ExperimentalEnvVar, "foo")()
+	assert.Check(t, !isExplicitSelectorInheritanceEnabled())
+
+	//check for env var ExperimentalEnvVar set to ExperimentalSelectorExplicit
+	defer env.Patch(t, ExperimentalEnvVar, ExperimentalSelectorExplicit)()
+	assert.Check(t, isExplicitSelectorInheritanceEnabled())
+}

pkg/app/context.go

@@ -0,0 +1,35 @@
+package app
+
+import (
+	"github.com/roboll/helmfile/pkg/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/desired_state_file_loader.go

@@ -0,0 +1,201 @@
+package app
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"github.com/imdario/mergo"
+	"github.com/roboll/helmfile/pkg/environment"
+	"github.com/roboll/helmfile/pkg/state"
+	"go.uber.org/zap"
+	"path/filepath"
+	"sort"
+)
+
+type desiredStateLoader struct {
+	KubeContext string
+	Reverse     bool
+
+	env       string
+	namespace string
+
+	readFile   func(string) ([]byte, error)
+	fileExists func(string) (bool, error)
+	abs        func(string) (string, error)
+	glob       func(string) ([]string, error)
+
+	logger *zap.SugaredLogger
+}
+
+func (ld *desiredStateLoader) Load(f string, opts LoadOpts) (*state.HelmState, error) {
+	var overrodeEnv *environment.Environment
+
+	args := opts.Environment.OverrideValues
+
+	if len(args) > 0 {
+		if opts.CalleePath == "" {
+			return nil, fmt.Errorf("bug: opts.CalleePath was nil: f=%s, opts=%v", f, opts)
+		}
+		storage := state.NewStorage(opts.CalleePath, ld.logger, ld.glob)
+		envld := state.NewEnvironmentValuesLoader(storage, ld.readFile)
+		handler := state.MissingFileHandlerError
+		vals, err := envld.LoadEnvironmentValues(&handler, args)
+		if err != nil {
+			return nil, err
+		}
+
+		overrodeEnv = &environment.Environment{
+			Name:   ld.env,
+			Values: vals,
+		}
+	}
+
+	st, err := ld.loadFileWithOverrides(nil, overrodeEnv, filepath.Dir(f), filepath.Base(f), true)
+	if err != nil {
+		return nil, err
+	}
+
+	if ld.Reverse {
+		rev := func(i, j int) bool {
+			return j < i
+		}
+		sort.Slice(st.Releases, rev)
+		sort.Slice(st.Helmfiles, rev)
+	}
+
+	if ld.KubeContext != "" {
+		if st.HelmDefaults.KubeContext != "" {
+			return nil, errors.New("err: Cannot use option --kube-context and set attribute helmDefaults.kubeContext.")
+		}
+		st.HelmDefaults.KubeContext = ld.KubeContext
+	}
+
+	if ld.namespace != "" {
+		if st.Namespace != "" {
+			return nil, errors.New("err: Cannot use option --namespace and set attribute namespace.")
+		}
+		st.Namespace = ld.namespace
+	}
+
+	return st, nil
+}
+
+func (ld *desiredStateLoader) loadFile(inheritedEnv *environment.Environment, baseDir, file string, evaluateBases bool) (*state.HelmState, error) {
+	return ld.loadFileWithOverrides(inheritedEnv, nil, baseDir, file, evaluateBases)
+}
+func (ld *desiredStateLoader) loadFileWithOverrides(inheritedEnv, overrodeEnv *environment.Environment, baseDir, file string, evaluateBases bool) (*state.HelmState, error) {
+	var f string
+	if filepath.IsAbs(file) {
+		f = file
+	} else {
+		f = filepath.Join(baseDir, file)
+	}
+
+	fileBytes, err := ld.readFile(f)
+	if err != nil {
+		return nil, err
+	}
+
+	ext := filepath.Ext(f)
+
+	var self *state.HelmState
+
+	if !experimentalModeEnabled() || ext == ".gotmpl" {
+		self, err = ld.renderAndLoad(
+			inheritedEnv,
+			overrodeEnv,
+			baseDir,
+			f,
+			fileBytes,
+			evaluateBases,
+		)
+	} else {
+		self, err = ld.load(
+			fileBytes,
+			baseDir,
+			file,
+			evaluateBases,
+			inheritedEnv,
+			overrodeEnv,
+		)
+	}
+
+	return self, err
+}
+
+func (a *desiredStateLoader) underlying() *state.StateCreator {
+	c := state.NewCreator(a.logger, a.readFile, a.fileExists, a.abs, a.glob)
+	c.LoadFile = a.loadFile
+	return c
+}
+
+func (a *desiredStateLoader) load(yaml []byte, baseDir, file string, evaluateBases bool, env, overrodeEnv *environment.Environment) (*state.HelmState, error) {
+	merged, err := env.Merge(overrodeEnv)
+	if err != nil {
+		return nil, err
+	}
+
+	st, err := a.underlying().ParseAndLoad(yaml, baseDir, file, a.env, evaluateBases, merged)
+	if err != nil {
+		return nil, err
+	}
+
+	helmfiles, err := st.ExpandedHelmfiles()
+	if err != nil {
+		return nil, err
+	}
+	st.Helmfiles = helmfiles
+
+	return st, nil
+}
+
+func (ld *desiredStateLoader) renderAndLoad(env, overrodeEnv *environment.Environment, baseDir, filename string, content []byte, evaluateBases bool) (*state.HelmState, error) {
+	parts := bytes.Split(content, []byte("\n---\n"))
+
+	var finalState *state.HelmState
+
+	for i, part := range parts {
+		var yamlBuf *bytes.Buffer
+		var err error
+
+		id := fmt.Sprintf("%s.part.%d", filename, i)
+
+		if env == nil && overrodeEnv == nil {
+			yamlBuf, err = ld.renderTemplatesToYaml(baseDir, id, part)
+			if err != nil {
+				return nil, fmt.Errorf("error during %s parsing: %v", id, err)
+			}
+		} else {
+			yamlBuf, err = ld.renderTemplatesToYamlWithEnv(baseDir, id, part, env, overrodeEnv)
+			if err != nil {
+				return nil, fmt.Errorf("error during %s parsing: %v", id, err)
+			}
+		}
+
+		currentState, err := ld.load(
+			yamlBuf.Bytes(),
+			baseDir,
+			filename,
+			evaluateBases,
+			env,
+			overrodeEnv,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		if finalState == nil {
+			finalState = currentState
+		} else {
+			if err := mergo.Merge(finalState, currentState, mergo.WithOverride); err != nil {
+				return nil, err
+			}
+		}
+
+		env = &finalState.Env
+
+		ld.logger.Debugf("merged environment: %v", env)
+	}
+
+	return finalState, nil
+}

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/load_opts.go

@@ -0,0 +1,28 @@
+package app
+
+import (
+	"github.com/roboll/helmfile/pkg/state"
+	"gopkg.in/yaml.v2"
+)
+
+type LoadOpts struct {
+	Selectors   []string
+	Environment state.SubhelmfileEnvironmentSpec
+
+	// CalleePath is the absolute path to the file being loaded
+	CalleePath string
+}
+
+func (o LoadOpts) DeepCopy() LoadOpts {
+	bytes, err := yaml.Marshal(o)
+	if err != nil {
+		panic(err)
+	}
+
+	new := LoadOpts{}
+	if err := yaml.Unmarshal(bytes, &new); err != nil {
+		panic(err)
+	}
+
+	return new
+}

pkg/app/run.go

@@ -0,0 +1,302 @@
+package app
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/pkg/argparser"
+	"github.com/roboll/helmfile/pkg/helmexec"
+	"github.com/roboll/helmfile/pkg/state"
+	"strings"
+)
+
+type Run struct {
+	state *state.HelmState
+	helm  helmexec.Interface
+	ctx   Context
+
+	Ask func(string) bool
+}
+
+func NewRun(st *state.HelmState, helm helmexec.Interface, ctx Context) *Run {
+	return &Run{state: st, helm: helm, ctx: ctx}
+}
+
+func (r *Run) askForConfirmation(msg string) bool {
+	if r.Ask != nil {
+		return r.Ask(msg)
+	}
+	return AskForConfirmation(msg)
+}
+
+func (r *Run) Deps(c DepsConfigProvider) []error {
+	r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
+
+	return r.state.UpdateDeps(r.helm)
+}
+
+func (r *Run) Repos(c ReposConfigProvider) []error {
+	r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
+
+	return r.ctx.SyncReposOnce(r.state, r.helm)
+}
+
+func (r *Run) DeprecatedSyncCharts(c DeprecatedChartsConfigProvider) []error {
+	st := r.state
+	helm := r.helm
+
+	affectedReleases := state.AffectedReleases{}
+	errs := st.SyncReleases(&affectedReleases, helm, c.Values(), c.Concurrency())
+	affectedReleases.DisplayAffectedReleases(c.Logger())
+	return errs
+}
+
+func (r *Run) Status(c StatusesConfigProvider) []error {
+	workers := c.Concurrency()
+
+	r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
+
+	return r.state.ReleaseStatuses(r.helm, workers)
+}
+
+func (r *Run) Delete(c DeleteConfigProvider) []error {
+	affectedReleases := state.AffectedReleases{}
+	purge := c.Purge()
+
+	errs := []error{}
+
+	names := make([]string, len(r.state.Releases))
+	for i, r := range r.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.Interactive()
+	if !interactive || interactive && r.askForConfirmation(msg) {
+		r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
+
+		errs = r.state.DeleteReleases(&affectedReleases, r.helm, purge)
+	}
+	affectedReleases.DisplayAffectedReleases(c.Logger())
+	return errs
+}
+
+func (r *Run) Destroy(c DestroyConfigProvider) []error {
+	errs := []error{}
+	affectedReleases := state.AffectedReleases{}
+
+	names := make([]string, len(r.state.Releases))
+	for i, r := range r.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.Interactive()
+	if !interactive || interactive && r.askForConfirmation(msg) {
+		r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
+
+		errs = r.state.DeleteReleases(&affectedReleases, r.helm, true)
+	}
+	affectedReleases.DisplayAffectedReleases(c.Logger())
+	return errs
+}
+
+func (r *Run) Apply(c ApplyConfigProvider) []error {
+	st := r.state
+	helm := r.helm
+	ctx := r.ctx
+
+	affectedReleases := state.AffectedReleases{}
+	if !c.SkipDeps() {
+		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.PrepareReleases(helm, "apply"); errs != nil && len(errs) > 0 {
+		return errs
+	}
+
+	// helm must be 2.11+ and helm-diff should be provided `--detailed-exitcode` in order for `helmfile apply` to work properly
+	detailedExitCode := true
+
+	releases, errs := st.DiffReleases(helm, c.Values(), c.Concurrency(), detailedExitCode, c.SuppressSecrets(), false)
+
+	releasesToBeDeleted, err := st.DetectReleasesToBeDeleted(helm)
+	if err != nil {
+		errs = append(errs, err)
+	}
+
+	fatalErrs := []error{}
+
+	noError := true
+	for _, e := range errs {
+		switch err := e.(type) {
+		case *state.ReleaseError:
+			if err.Code != 2 {
+				noError = false
+				fatalErrs = append(fatalErrs, e)
+			}
+		default:
+			noError = false
+			fatalErrs = append(fatalErrs, e)
+		}
+	}
+
+	// sync only when there are changes
+	if noError {
+		if len(releases) == 0 && len(releasesToBeDeleted) == 0 {
+			// TODO better way to get the logger
+			logger := c.Logger()
+			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 := fmt.Sprintf(`Affected releases are:
+%s
+
+Do you really want to apply?
+  Helmfile will apply all your changes, as shown above.
+
+`, strings.Join(names, "\n"))
+			interactive := c.Interactive()
+			if !interactive || interactive && r.askForConfirmation(msg) {
+				rs := []state.ReleaseSpec{}
+				for _, r := range releases {
+					rs = append(rs, *r)
+				}
+				for _, r := range releasesToBeDeleted {
+					rs = append(rs, *r)
+				}
+
+				r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
+
+				st.Releases = rs
+				return st.SyncReleases(&affectedReleases, helm, c.Values(), c.Concurrency())
+			}
+		}
+	}
+
+	affectedReleases.DisplayAffectedReleases(c.Logger())
+	return fatalErrs
+}
+
+func (r *Run) Diff(c DiffConfigProvider) []error {
+	st := r.state
+	helm := r.helm
+	ctx := r.ctx
+
+	if !c.SkipDeps() {
+		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.PrepareReleases(helm, "diff"); errs != nil && len(errs) > 0 {
+		return errs
+	}
+
+	r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
+
+	_, errs := st.DiffReleases(helm, c.Values(), c.Concurrency(), c.DetailedExitcode(), c.SuppressSecrets(), true)
+	return errs
+}
+
+func (r *Run) Sync(c SyncConfigProvider) []error {
+	st := r.state
+	helm := r.helm
+	ctx := r.ctx
+
+	affectedReleases := state.AffectedReleases{}
+	if !c.SkipDeps() {
+		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.PrepareReleases(helm, "sync"); errs != nil && len(errs) > 0 {
+		return errs
+	}
+
+	r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
+
+	errs := st.SyncReleases(&affectedReleases, helm, c.Values(), c.Concurrency())
+	affectedReleases.DisplayAffectedReleases(c.Logger())
+	return errs
+}
+
+func (r *Run) Template(c TemplateConfigProvider) []error {
+	state := r.state
+	helm := r.helm
+	ctx := r.ctx
+
+	if !c.SkipDeps() {
+		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.PrepareReleases(helm, "template"); errs != nil && len(errs) > 0 {
+		return errs
+	}
+
+	args := argparser.GetArgs(c.Args(), state)
+	return state.TemplateReleases(helm, c.Values(), args, c.Concurrency())
+}
+
+func (r *Run) Test(c TestConfigProvider) []error {
+	cleanup := c.Cleanup()
+	timeout := c.Timeout()
+	concurrency := c.Concurrency()
+
+	r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
+
+	return r.state.TestReleases(r.helm, cleanup, timeout, concurrency)
+}
+
+func (r *Run) Lint(c LintConfigProvider) []error {
+	state := r.state
+	helm := r.helm
+	ctx := r.ctx
+
+	values := c.Values()
+	args := argparser.GetArgs(c.Args(), state)
+	workers := c.Concurrency()
+	if !c.SkipDeps() {
+		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.PrepareReleases(helm, "lint"); errs != nil && len(errs) > 0 {
+		return errs
+	}
+	return state.LintReleases(helm, values, args, workers)
+}

pkg/app/two_pass_renderer.go

@@ -0,0 +1,119 @@
+package app
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/google/go-cmp/cmp"
+	"github.com/roboll/helmfile/pkg/environment"
+	"github.com/roboll/helmfile/pkg/state"
+	"github.com/roboll/helmfile/pkg/tmpl"
+	"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()
+}
+
+func (r *desiredStateLoader) renderEnvironment(firstPassEnv *environment.Environment, baseDir, filename string, content []byte) *environment.Environment {
+	tmplData := state.EnvironmentTemplateData{Environment: *firstPassEnv, Namespace: r.namespace}
+	firstPassRenderer := tmpl.NewFirstPassRenderer(baseDir, 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", 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
+		}
+	}
+	yamlData := yamlBuf.String()
+
+	// Work-around for https://github.com/golang/go/issues/24963
+	sanitized := strings.ReplaceAll(yamlData, "<no value>", "")
+
+	if len(yamlData) != len(sanitized) {
+		msg := "replaced <no value>s to workaround https://github.com/golang/go/issues/24963 to address https://github.com/roboll/helmfile/issues/553:\n%s"
+		r.logger.Debugf(msg, cmp.Diff(yamlData, sanitized))
+	}
+
+	c := r.underlying()
+	c.Strict = false
+	// create preliminary state, as we may have an environment. Tolerate errors.
+	prestate, err := c.ParseAndLoad([]byte(sanitized), baseDir, filename, r.env, false, firstPassEnv)
+	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", filename, prependLineNumbers(yamlBuf.String()))
+	}
+
+	if prestate != nil {
+		firstPassEnv = &prestate.Env
+	}
+	return firstPassEnv
+}
+
+type RenderOpts struct {
+}
+
+func (r *desiredStateLoader) renderTemplatesToYaml(baseDir, filename string, content []byte) (*bytes.Buffer, error) {
+	env := &environment.Environment{Name: r.env, Values: map[string]interface{}(nil)}
+
+	return r.renderTemplatesToYamlWithEnv(baseDir, filename, content, env, nil)
+}
+
+func (r *desiredStateLoader) renderTemplatesToYamlWithEnv(baseDir, filename string, content []byte, inherited, overrode *environment.Environment) (*bytes.Buffer, error) {
+	return r.twoPassRenderTemplateToYaml(inherited, overrode, baseDir, filename, content)
+}
+
+func (r *desiredStateLoader) twoPassRenderTemplateToYaml(inherited, overrode *environment.Environment, baseDir, filename string, content []byte) (*bytes.Buffer, error) {
+	// try a first pass render. This will always succeed, but can produce a limited env
+	if r.logger != nil {
+		r.logger.Debugf("first-pass rendering starting for \"%s\": inherited=%v, overrode=%v", filename, inherited, overrode)
+	}
+
+	initEnv, err := inherited.Merge(overrode)
+	if err != nil {
+		return nil, err
+	}
+
+	if r.logger != nil {
+		r.logger.Debugf("first-pass uses: %v", initEnv)
+	}
+
+	renderedEnv := r.renderEnvironment(initEnv, baseDir, filename, content)
+
+	if r.logger != nil {
+		r.logger.Debugf("first-pass produced: %v", renderedEnv)
+	}
+
+	finalEnv, err := renderedEnv.Merge(overrode)
+	if err != nil {
+		return nil, err
+	}
+
+	if r.logger != nil {
+		r.logger.Debugf("first-pass rendering result of \"%s\": %v", filename, *finalEnv)
+	}
+
+	tmplData := state.EnvironmentTemplateData{Environment: *finalEnv, Namespace: r.namespace}
+	secondPassRenderer := tmpl.NewFileRenderer(r.readFile, baseDir, 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", filename, prependLineNumbers(string(content)))
+		}
+		return nil, err
+	}
+	if r.logger != nil {
+		r.logger.Debugf("second-pass rendering result of \"%s\":\n%s", filename, prependLineNumbers(yamlBuf.String()))
+	}
+	return yamlBuf, nil
+}

pkg/app/two_pass_renderer_test.go

@@ -1,26 +1,26 @@
-package main
+package app
 
 import (
-	"fmt"
+	"github.com/roboll/helmfile/pkg/helmexec"
+	"github.com/roboll/helmfile/pkg/state"
 	"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 makeLoader(files map[string]string, env string) (*desiredStateLoader, *state.TestFs) {
+	testfs := state.NewTestFs(files)
+	return &desiredStateLoader{
+		env:        env,
+		namespace:  "namespace",
+		logger:     helmexec.NewLogger(os.Stdout, "debug"),
+		readFile:   testfs.ReadFile,
+		fileExists: testfs.FileExists,
+		abs:        testfs.Abs,
+		glob:       testfs.Glob,
+	}, testfs
 }
 
 func TestReadFromYaml_MakeEnvironmentHasNoSideEffects(t *testing.T) {
@@ -37,30 +37,21 @@ releases:
   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
+	files := map[string]string{
+		"/path/to/default/values.yaml":       ``,
+		"/path/to/other/default/values.yaml": `SecondPass`,
 	}
 
-	r := makeRenderer(fileReader, "staging")
-	yamlBuf, err := r.renderTemplate(yamlContent)
+	r, testfs := makeLoader(files, "staging")
+	yamlBuf, err := r.renderTemplatesToYaml("", "", yamlContent)
 	if err != nil {
-		t.Errorf("unexpected error: %v", err)
+		t.Fatalf("unexpected error: %v", err)
 	}
 
 	var state state.HelmState
 	err = yaml.Unmarshal(yamlBuf.Bytes(), &state)
 
-	if fileReaderCalls > 2 {
+	if testfs.FileReaderCalls() > 2 {
 		t.Error("reader should be called only twice")
 	}
 
@@ -71,10 +62,10 @@ releases:
 
 func TestReadFromYaml_RenderTemplate(t *testing.T) {
 
-	defaultValuesYaml := []byte(`
+	defaultValuesYaml := `
 releaseName: "hello"
 conditionalReleaseTag: "yes"
-`)
+`
 
 	yamlContent := []byte(`
 environments:
@@ -93,18 +84,13 @@ releases:
 
 `)
 
-	// 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
+	files := map[string]string{
+		"/path/to/default/values.yaml": defaultValuesYaml,
 	}
 
-	r := makeRenderer(fileReader, "staging")
+	r, _ := makeLoader(files, "staging")
 	// test the double rendering
-	yamlBuf, err := r.renderTemplate(yamlContent)
+	yamlBuf, err := r.renderTemplatesToYaml("", "", yamlContent)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -130,7 +116,7 @@ releases:
 }
 
 func TestReadFromYaml_RenderTemplateWithValuesReferenceError(t *testing.T) {
-	defaultValuesYaml := []byte("")
+	defaultValuesYaml := ``
 
 	yamlContent := []byte(`
 environments:
@@ -146,14 +132,13 @@ releases:
 {{ end }}
 `)
 
-	// make a reader that returns a simulated context
-	fileReader := func(filename string) ([]byte, error) {
-		return defaultValuesYaml, nil
+	files := map[string]string{
+		"/path/to/default/values.yaml": defaultValuesYaml,
 	}
 
-	r := makeRenderer(fileReader, "staging")
+	r, _ := makeLoader(files, "staging")
 	// test the double rendering
-	_, err := r.renderTemplate(yamlContent)
+	_, err := r.renderTemplatesToYaml("", "", yamlContent)
 
 	if !strings.Contains(err.Error(), "stringTemplate:8") {
 		t.Fatalf("error should contain a stringTemplate error (reference to unknow key) %v", err)
@@ -165,9 +150,9 @@ releases:
 // This does not apply to .gotmpl files, which is a nice side-effect.
 func TestReadFromYaml_RenderTemplateWithGotmpl(t *testing.T) {
 
-	defaultValuesYamlGotmpl := []byte(`
+	defaultValuesYamlGotmpl := `
 releaseName: {{ readFile "nonIgnoredFile" }}
-`)
+`
 
 	yamlContent := []byte(`
 environments:
@@ -183,15 +168,13 @@ releases:
 {{ end }}
 `)
 
-	fileReader := func(filename string) ([]byte, error) {
-		if strings.HasSuffix(filename, "nonIgnoredFile") {
-			return []byte("release-a"), nil
-		}
-		return defaultValuesYamlGotmpl, nil
+	files := map[string]string{
+		"/path/to/nonIgnoredFile":     `release-a`,
+		"/path/to/values.yaml.gotmpl": defaultValuesYamlGotmpl,
 	}
 
-	r := makeRenderer(fileReader, "staging")
-	rendered, _ := r.renderTemplate(yamlContent)
+	r, _ := makeLoader(files, "staging")
+	rendered, _ := r.renderTemplatesToYaml("", "", yamlContent)
 
 	var state state.HelmState
 	yaml.Unmarshal(rendered.Bytes(), &state)
@@ -206,19 +189,15 @@ releases:
 }
 
 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
-	}
+	files := map[string]string{}
 
-	r := makeRenderer(fileReader, "staging")
-	yamlBuf, err := r.renderTemplate(yamlContent)
+	r, _ := makeLoader(files, "staging")
+	yamlBuf, err := r.renderTemplatesToYaml("", "", yamlContent)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -231,7 +210,7 @@ func TestReadFromYaml_RenderTemplateWithNamespace(t *testing.T) {
 	}
 }
 
-func TestReadFromYaml_HelfileShouldBeResilentToTemplateErrors(t *testing.T) {
+func TestReadFromYaml_HelmfileShouldBeResilentToTemplateErrors(t *testing.T) {
 	yamlContent := []byte(`environments:
   staging:
 	production:
@@ -244,12 +223,9 @@ releases:
 {{ end }}
   chart: mychart
 `)
-	fileReader := func(filename string) ([]byte, error) {
-		return yamlContent, nil
-	}
 
-	r := makeRenderer(fileReader, "staging")
-	_, err := r.renderTemplate(yamlContent)
+	r, _ := makeLoader(map[string]string{}, "staging")
+	_, err := r.renderTemplatesToYaml("", "", yamlContent)
 	if err == nil {
 		t.Fatalf("wanted error, none returned")
 	}

pkg/argparser/args.go

@@ -1,10 +1,9 @@
-package args
+package argparser
 
 import (
 	"fmt"
+	"github.com/roboll/helmfile/pkg/state"
 	"strings"
-
-	"github.com/roboll/helmfile/state"
 )
 
 type keyVal struct {
@@ -83,9 +82,6 @@ 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)
 	}

pkg/argparser/args_test.go

@@ -1,10 +1,9 @@
-package args
+package argparser
 
 import (
+	"github.com/roboll/helmfile/pkg/state"
 	"strings"
 	"testing"
-
-	"github.com/roboll/helmfile/state"
 )
 
 func TestGetArgs(t *testing.T) {

pkg/environment/environment.go

@@ -0,0 +1,50 @@
+package environment
+
+import (
+	"github.com/imdario/mergo"
+	"github.com/roboll/helmfile/pkg/maputil"
+	"gopkg.in/yaml.v2"
+)
+
+type Environment struct {
+	Name   string
+	Values map[string]interface{}
+}
+
+var EmptyEnvironment Environment
+
+func (e Environment) DeepCopy() Environment {
+	bytes, err := yaml.Marshal(e.Values)
+	if err != nil {
+		panic(err)
+	}
+	var values map[string]interface{}
+	if err := yaml.Unmarshal(bytes, &values); err != nil {
+		panic(err)
+	}
+	values, err = maputil.CastKeysToStrings(values)
+	if err != nil {
+		panic(err)
+	}
+	return Environment{
+		Name:   e.Name,
+		Values: values,
+	}
+}
+
+func (e *Environment) Merge(other *Environment) (*Environment, error) {
+	if e == nil {
+		if other != nil {
+			copy := other.DeepCopy()
+			return &copy, nil
+		}
+		return nil, nil
+	}
+	copy := e.DeepCopy()
+	if other != nil {
+		if err := mergo.Merge(&copy, other, mergo.WithOverride); err != nil {
+			return nil, err
+		}
+	}
+	return &copy, nil
+}

pkg/event/bus.go

@@ -2,9 +2,9 @@ package event
 
 import (
 	"fmt"
-	"github.com/roboll/helmfile/environment"
-	"github.com/roboll/helmfile/helmexec"
-	"github.com/roboll/helmfile/tmpl"
+	"github.com/roboll/helmfile/pkg/environment"
+	"github.com/roboll/helmfile/pkg/helmexec"
+	"github.com/roboll/helmfile/pkg/tmpl"
 	"go.uber.org/zap"
 	"os"
 )
@@ -88,7 +88,7 @@ func (bus *Bus) Trigger(evt string, context map[string]interface{}) (bool, error
 			}
 		}
 
-		bytes, err := bus.Runner.Execute(command, args)
+		bytes, err := bus.Runner.Execute(command, args, map[string]string{})
 		bus.Logger.Debugf("hook[%s]: %s\n", name, string(bytes))
 
 		if err != nil {

pkg/event/bus_test.go

@@ -2,8 +2,8 @@ package event
 
 import (
 	"fmt"
-	"github.com/roboll/helmfile/environment"
-	"github.com/roboll/helmfile/helmexec"
+	"github.com/roboll/helmfile/pkg/environment"
+	"github.com/roboll/helmfile/pkg/helmexec"
 	"os"
 	"testing"
 )
@@ -13,7 +13,7 @@ var logger = helmexec.NewLogger(os.Stdout, "warn")
 type runner struct {
 }
 
-func (r *runner) Execute(cmd string, args []string) ([]byte, error) {
+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)
 	}

pkg/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{}
+	}
+}

pkg/helmexec/exec.go

@@ -1,11 +1,11 @@
 package helmexec
 
 import (
+	"fmt"
 	"io"
 	"io/ioutil"
 	"os"
 	"strings"
-
 	"sync"
 
 	"go.uber.org/zap"
@@ -48,7 +48,9 @@ func New(logger *zap.SugaredLogger, kubeContext string) *execer {
 		helmBinary:  command,
 		logger:      logger,
 		kubeContext: kubeContext,
-		runner:      &ShellRunner{},
+		runner: &ShellRunner{
+			logger: logger,
+		},
 	}
 }
 
@@ -70,47 +72,72 @@ 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...)
-	helm.write(out)
+	out, err := helm.exec(args, map[string]string{})
+	helm.info(out)
 	return err
 }
 
 func (helm *execer) UpdateRepo() error {
 	helm.logger.Info("Updating repo")
-	out, err := helm.exec("repo", "update")
-	helm.write(out)
+	out, err := helm.exec([]string{"repo", "update"}, map[string]string{})
+	helm.info(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.info(out)
+	return err
+}
+
+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(name, chart string, flags ...string) error {
+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 {
@@ -145,47 +172,72 @@ func (helm *execer) DecryptSecret(name string) (string, error) {
 }
 
 func (helm *execer) TemplateRelease(chart string, flags ...string) error {
-	out, err := helm.exec(append([]string{"template", chart}, flags...)...)
+	out, err := helm.exec(append([]string{"template", chart}, flags...), map[string]string{})
 	helm.write(out)
 	return err
 }
 
-func (helm *execer) DiffRelease(name, chart string, flags ...string) error {
+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...)...)
-	helm.write(out)
+	preArgs := context.GetTillerlessArgs(helm.helmBinary)
+	env := context.getTillerlessEnv()
+	out, err := helm.exec(append(append(preArgs, "diff", "upgrade", "--allow-unreleased", name, chart), flags...), env)
+	// Do our best to write STDOUT only when diff existed
+	// Unfortunately, this works only when you run helmfile with `--detailed-exitcode`
+	detailedExitcodeEnabled := false
+	for _, f := range flags {
+		if strings.Contains(f, "detailed-exitcode") {
+			detailedExitcodeEnabled = true
+			break
+		}
+	}
+	if detailedExitcodeEnabled {
+		switch e := err.(type) {
+		case ExitError:
+			if e.ExitStatus() == 2 {
+				helm.write(out)
+				return err
+			}
+		}
+	} else {
+		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...)...)
-	helm.write(out)
+	out, err := helm.exec(append([]string{"fetch", chart}, flags...), map[string]string{})
+	helm.info(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...)
@@ -193,12 +245,21 @@ func (helm *execer) exec(args ...string) ([]byte, error) {
 	if helm.kubeContext != "" {
 		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)
+	cmd := fmt.Sprintf("exec: %s %s", helm.helmBinary, strings.Join(cmdargs, " "))
+	helm.logger.Debug(cmd)
+	bytes, err := helm.runner.Execute(helm.helmBinary, cmdargs, env)
+	helm.logger.Debugf("%s: %s", cmd, bytes)
+	return bytes, err
 }
 
-func (helm *execer) write(out []byte) {
+func (helm *execer) info(out []byte) {
 	if len(out) > 0 {
 		helm.logger.Infof("%s", out)
 	}
 }
+
+func (helm *execer) write(out []byte) {
+	if len(out) > 0 {
+		fmt.Printf("%s\n", out)
+	}
+}

pkg/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
 }
 
@@ -77,6 +78,7 @@ func Test_AddRepo(t *testing.T) {
 	helm.AddRepo("myRepo", "https://repo.example.com/", "cert.pem", "key.pem", "", "")
 	expected := `Adding repo myRepo https://repo.example.com/
 exec: helm repo add myRepo https://repo.example.com/ --cert-file cert.pem --key-file key.pem --kube-context dev
+exec: helm repo add myRepo https://repo.example.com/ --cert-file cert.pem --key-file key.pem --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.AddRepo()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -86,6 +88,7 @@ exec: helm repo add myRepo https://repo.example.com/ --cert-file cert.pem --key-
 	helm.AddRepo("myRepo", "https://repo.example.com/", "", "", "", "")
 	expected = `Adding repo myRepo https://repo.example.com/
 exec: helm repo add myRepo https://repo.example.com/ --kube-context dev
+exec: helm repo add myRepo https://repo.example.com/ --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.AddRepo()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -95,6 +98,7 @@ exec: helm repo add myRepo https://repo.example.com/ --kube-context dev
 	helm.AddRepo("myRepo", "https://repo.example.com/", "", "", "example_user", "example_password")
 	expected = `Adding repo myRepo https://repo.example.com/
 exec: helm repo add myRepo https://repo.example.com/ --username example_user --password example_password --kube-context dev
+exec: helm repo add myRepo https://repo.example.com/ --username example_user --password example_password --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.AddRepo()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -108,6 +112,7 @@ func Test_UpdateRepo(t *testing.T) {
 	helm.UpdateRepo()
 	expected := `Updating repo
 exec: helm repo update --kube-context dev
+exec: helm repo update --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.UpdateRepo()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -118,18 +123,35 @@ 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
+exec: 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)
 	}
 
 	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
+exec: helm upgrade --install --reset-values release chart --kube-context dev: 
+`
+	if buffer.String() != expected {
+		t.Errorf("helmexec.SyncRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
+	}
+}
+
+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
+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)
@@ -143,6 +165,7 @@ func Test_UpdateDeps(t *testing.T) {
 	helm.UpdateDeps("./chart/foo")
 	expected := `Updating dependency ./chart/foo
 exec: helm dependency update ./chart/foo --kube-context dev
+exec: helm dependency update ./chart/foo --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.UpdateDeps()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -153,19 +176,46 @@ exec: helm dependency update ./chart/foo --kube-context dev
 	helm.UpdateDeps("./chart/foo")
 	expected = `Updating dependency ./chart/foo
 exec: helm dependency update ./chart/foo --verify --kube-context dev
+exec: helm dependency update ./chart/foo --verify --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.AddRepo()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}
 }
 
+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
+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
+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
+exec: helm secrets dec secretName --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.DecryptSecret()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -176,18 +226,34 @@ 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
+exec: 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)
 	}
 
 	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
+exec: helm diff upgrade --allow-unreleased release chart --kube-context dev: 
+`
+	if buffer.String() != expected {
+		t.Errorf("helmexec.DiffRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
+	}
+}
+
+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
+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)
@@ -198,9 +264,10 @@ 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
+exec: helm delete release --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.DeleteRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -210,9 +277,10 @@ 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
+exec: helm delete release --purge --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.DeleteRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -223,9 +291,10 @@ 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
+exec: helm test release --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.TestRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -235,9 +304,10 @@ 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
+exec: helm test release --cleanup --timeout 60 --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.TestRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -248,9 +318,10 @@ 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
+exec: helm status myRelease --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.ReleaseStatus()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -261,37 +332,46 @@ func Test_exec(t *testing.T) {
 	var buffer bytes.Buffer
 	logger := NewLogger(&buffer, "debug")
 	helm := MockExecer(logger, "")
-	helm.exec("version")
-	expected := "exec: helm version\n"
+	env := map[string]string{}
+	helm.exec([]string{"version"}, env)
+	expected := `exec: helm version
+exec: helm version: 
+`
 	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")
-	expected = "exec: helm diff release chart --timeout 10 --wait --kube-context dev\n"
+	helm.exec([]string{"diff", "release", "chart", "--timeout 10", "--wait"}, env)
+	expected = `exec: helm diff release chart --timeout 10 --wait --kube-context dev
+exec: helm diff release chart --timeout 10 --wait --kube-context dev: 
+`
 	if buffer.String() != expected {
 		t.Errorf("helmexec.exec()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}
 
 	buffer.Reset()
-	helm.exec("version")
-	expected = "exec: helm version --kube-context dev\n"
+	helm.exec([]string{"version"}, env)
+	expected = `exec: helm version --kube-context dev
+exec: helm version --kube-context dev: 
+`
 	if buffer.String() != expected {
 		t.Errorf("helmexec.exec()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}
 
 	buffer.Reset()
 	helm.SetExtraArgs("foo")
-	helm.exec("version")
-	expected = "exec: helm version foo --kube-context dev\n"
+	helm.exec([]string{"version"}, env)
+	expected = `exec: helm version foo --kube-context dev
+exec: helm version foo --kube-context dev: 
+`
 	if buffer.String() != expected {
 		t.Errorf("helmexec.exec()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}
@@ -299,8 +379,10 @@ func Test_exec(t *testing.T) {
 	buffer.Reset()
 	helm = MockExecer(logger, "")
 	helm.SetHelmBinary("overwritten")
-	helm.exec("version")
-	expected = "exec: overwritten version\n"
+	helm.exec([]string{"version"}, env)
+	expected = `exec: overwritten version
+exec: overwritten version: 
+`
 	if buffer.String() != expected {
 		t.Errorf("helmexec.exec()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}
@@ -313,6 +395,7 @@ func Test_Lint(t *testing.T) {
 	helm.Lint("path/to/chart", "--values", "file.yml")
 	expected := `Linting path/to/chart
 exec: helm lint path/to/chart --values file.yml --kube-context dev
+exec: helm lint path/to/chart --values file.yml --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.Lint()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -326,6 +409,7 @@ func Test_Fetch(t *testing.T) {
 	helm.Fetch("chart", "--version", "1.2.3", "--untar", "--untardir", "/tmp/dir")
 	expected := `Fetching chart
 exec: helm fetch chart --version 1.2.3 --untar --untardir /tmp/dir --kube-context dev
+exec: helm fetch chart --version 1.2.3 --untar --untardir /tmp/dir --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.Lint()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -335,6 +419,7 @@ exec: helm fetch chart --version 1.2.3 --untar --untardir /tmp/dir --kube-contex
 var logLevelTests = map[string]string{
 	"debug": `Adding repo myRepo https://repo.example.com/
 exec: helm repo add myRepo https://repo.example.com/ --username example_user --password example_password
+exec: helm repo add myRepo https://repo.example.com/ --username example_user --password example_password: 
 `,
 	"info": `Adding repo myRepo https://repo.example.com/
 `,
@@ -353,3 +438,37 @@ 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)
+	}
+}

pkg/helmexec/exit_error.go

@@ -0,0 +1,36 @@
+package helmexec
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+)
+
+func newExitError(helmCmdPath string, exitStatus int, errorMessage string) ExitError {
+	return ExitError{
+		msg:        fmt.Sprintf("%s exited with status %d:\n%s", filepath.Base(helmCmdPath), exitStatus, indent(strings.TrimSpace(errorMessage))),
+		exitStatus: exitStatus,
+	}
+}
+
+func indent(text string) string {
+	lines := strings.Split(text, "\n")
+	for i := range lines {
+		lines[i] = "  " + lines[i]
+	}
+	return strings.Join(lines, "\n")
+}
+
+// ExitError is created whenever your shell command exits with a non-zero exit status
+type ExitError struct {
+	msg        string
+	exitStatus int
+}
+
+func (e ExitError) Error() string {
+	return e.msg
+}
+
+func (e ExitError) ExitStatus() int {
+	return e.exitStatus
+}

pkg/helmexec/helmexec.go

@@ -0,0 +1,26 @@
+package helmexec
+
+// Interface for executing helm commands
+type Interface interface {
+	SetExtraArgs(args ...string)
+	SetHelmBinary(bin string)
+
+	AddRepo(name, repository, certfile, keyfile, username, password string) error
+	UpdateRepo() error
+	BuildDeps(chart string) error
+	UpdateDeps(chart 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(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)
+}
+
+type DependencyUpdater interface {
+	UpdateDeps(chart string) error
+}

pkg/helmexec/runner.go

@@ -0,0 +1,99 @@
+package helmexec
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"go.uber.org/zap"
+	"os"
+	"os/exec"
+	"strings"
+	"syscall"
+)
+
+const (
+	tmpPrefix = "helmfile-"
+	tmpSuffix = "-exec"
+)
+
+// Runner interface for shell commands
+type Runner interface {
+	Execute(cmd string, args []string, env map[string]string) ([]byte, error)
+}
+
+// ShellRunner implemention for shell commands
+type ShellRunner struct {
+	Dir string
+
+	logger *zap.SugaredLogger
+}
+
+// Execute a shell command
+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 combinedOutput(preparedCmd, shell.logger)
+}
+
+func combinedOutput(c *exec.Cmd, logger *zap.SugaredLogger) ([]byte, error) {
+	if c.Stdout != nil {
+		return nil, errors.New("exec: Stdout already set")
+	}
+	if c.Stderr != nil {
+		return nil, errors.New("exec: Stderr already set")
+	}
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	c.Stdout = &stdout
+	c.Stderr = &stderr
+	err := c.Run()
+
+	o := stdout.Bytes()
+	e := stderr.Bytes()
+
+	if err != nil {
+		// TrimSpace is necessary, because otherwise helmfile prints the redundant new-lines after each error like:
+		//
+		//   err: release "envoy2" in "helmfile.yaml" failed: exit status 1: Error: could not find a ready tiller pod
+		//   <redundant new line!>
+		//   err: release "envoy" in "helmfile.yaml" failed: exit status 1: Error: could not find a ready tiller pod
+		switch ee := err.(type) {
+		case *exec.ExitError:
+			// Propagate any non-zero exit status from the external command, rather than throwing it away,
+			// so that helmfile could return its own exit code accordingly
+			waitStatus := ee.Sys().(syscall.WaitStatus)
+			exitStatus := waitStatus.ExitStatus()
+			err = newExitError(c.Path, exitStatus, string(e))
+		default:
+			panic(fmt.Sprintf("unexpected error: %v", err))
+		}
+	}
+
+	return o, err
+}
+
+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
+}

pkg/maputil/maputil.go

@@ -0,0 +1,86 @@
+package maputil
+
+import "fmt"
+
+func CastKeysToStrings(s interface{}) (map[string]interface{}, error) {
+	new := map[string]interface{}{}
+	switch src := s.(type) {
+	case map[interface{}]interface{}:
+		for k, v := range src {
+			var str_k string
+			switch typed_k := k.(type) {
+			case string:
+				str_k = typed_k
+			default:
+				return nil, fmt.Errorf("unexpected type of key in map: expected string, got %T: value=%v, map=%v", typed_k, typed_k, src)
+			}
+
+			casted_v, err := recursivelyStringifyMapKey(v)
+			if err != nil {
+				return nil, err
+			}
+
+			new[str_k] = casted_v
+		}
+	case map[string]interface{}:
+		for k, v := range src {
+			casted_v, err := recursivelyStringifyMapKey(v)
+			if err != nil {
+				return nil, err
+			}
+
+			new[k] = casted_v
+		}
+	}
+	return new, nil
+}
+
+func recursivelyStringifyMapKey(v interface{}) (interface{}, error) {
+	var casted_v interface{}
+	switch typed_v := v.(type) {
+	case map[interface{}]interface{}, map[string]interface{}:
+		tmp, err := CastKeysToStrings(typed_v)
+		if err != nil {
+			return nil, err
+		}
+		casted_v = tmp
+	case []interface{}:
+		a := []interface{}{}
+		for i := range typed_v {
+			res, err := recursivelyStringifyMapKey(typed_v[i])
+			if err != nil {
+				return nil, err
+			}
+			a = append(a, res)
+		}
+		casted_v = a
+	default:
+		casted_v = typed_v
+	}
+	return casted_v, nil
+}
+
+func Set(m map[string]interface{}, key []string, value string) map[string]interface{} {
+	if len(key) == 0 {
+		panic(fmt.Errorf("bug: unexpected length of key: %d", len(key)))
+	}
+
+	k := key[0]
+
+	if len(key) == 1 {
+		m[k] = value
+		return m
+	}
+
+	remain := key[1:]
+
+	nested, ok := m[k]
+	if !ok {
+		new_m := map[string]interface{}{}
+		nested = Set(new_m, remain, value)
+	}
+
+	m[k] = nested
+
+	return m
+}

pkg/state/chart_dependency.go

@@ -0,0 +1,381 @@
+package state
+
+import (
+	"fmt"
+	"github.com/Masterminds/semver"
+	"github.com/roboll/helmfile/pkg/helmexec"
+	"go.uber.org/zap"
+	"gopkg.in/yaml.v2"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type ChartMeta struct {
+	Name string `yaml:"name"`
+}
+
+type unresolvedChartDependency struct {
+	// ChartName identifies the dependant chart. In Helmfile, ChartName for `chart: stable/envoy` would be just `envoy`.
+	// It can't be collided with other charts referenced in the same helmfile spec.
+	// That is, collocating `chart: incubator/foo` and `chart: stable/foo` isn't allowed. Name them differently for a work-around.
+	ChartName string `yaml:"name"`
+	// Repository contains the URL for the helm chart repository that hosts the chart identified by ChartName
+	Repository string `yaml:"repository"`
+	// VersionConstraint is the version constraint of the dependent chart. "*" means the latest version.
+	VersionConstraint string `yaml:"version"`
+}
+
+type ResolvedChartDependency struct {
+	// ChartName identifies the dependant chart. In Helmfile, ChartName for `chart: stable/envoy` would be just `envoy`.
+	// It can't be collided with other charts referenced in the same helmfile spec.
+	// That is, collocating `chart: incubator/foo` and `chart: stable/foo` isn't allowed. Name them differently for a work-around.
+	ChartName string `yaml:"name"`
+	// Repository contains the URL for the helm chart repository that hosts the chart identified by ChartName
+	Repository string `yaml:"repository"`
+	// Version is the version number of the dependent chart.
+	// In the context of helmfile this can be omitted. When omitted, it is considered `*` which results helm/helmfile fetching the latest version.
+	Version string `yaml:"version"`
+}
+
+type UnresolvedDependencies struct {
+	deps map[string][]unresolvedChartDependency
+}
+
+type ChartRequirements struct {
+	UnresolvedDependencies []unresolvedChartDependency `yaml:"dependencies"`
+}
+
+type ChartLockedRequirements struct {
+	ResolvedDependencies []ResolvedChartDependency `yaml:"dependencies"`
+}
+
+func (d *UnresolvedDependencies) Add(chart, url, versionConstraint string) error {
+	dep := unresolvedChartDependency{
+		ChartName:         chart,
+		Repository:        url,
+		VersionConstraint: versionConstraint,
+	}
+	return d.add(dep)
+}
+
+func (d *UnresolvedDependencies) add(dep unresolvedChartDependency) error {
+	deps := d.deps[dep.ChartName]
+	if deps == nil {
+		deps = []unresolvedChartDependency{dep}
+	} else {
+		deps = append(deps, dep)
+	}
+	d.deps[dep.ChartName] = deps
+	return nil
+}
+
+func (d *UnresolvedDependencies) ToChartRequirements() *ChartRequirements {
+	deps := []unresolvedChartDependency{}
+
+	for _, ds := range d.deps {
+		for _, d := range ds {
+			if d.VersionConstraint == "" {
+				d.VersionConstraint = "*"
+			}
+			deps = append(deps, d)
+		}
+	}
+
+	return &ChartRequirements{UnresolvedDependencies: deps}
+}
+
+type ResolvedDependencies struct {
+	deps map[string][]ResolvedChartDependency
+}
+
+func (d *ResolvedDependencies) add(dep ResolvedChartDependency) error {
+	deps := d.deps[dep.ChartName]
+	if deps == nil {
+		deps = []ResolvedChartDependency{dep}
+	} else {
+		deps = append(deps, dep)
+	}
+	d.deps[dep.ChartName] = deps
+	return nil
+}
+
+func (d *ResolvedDependencies) Get(chart, versionConstraint string) (string, error) {
+	if versionConstraint == "" {
+		versionConstraint = "*"
+	}
+
+	deps, exists := d.deps[chart]
+	if exists {
+		for _, dep := range deps {
+			constraint, err := semver.NewConstraint(versionConstraint)
+			if err != nil {
+				return "", err
+			}
+			version, err := semver.NewVersion(dep.Version)
+			if err != nil {
+				return "", err
+			}
+			if constraint.Check(version) {
+				return dep.Version, nil
+			}
+		}
+	}
+	return "", fmt.Errorf("no resolved dependency found for \"%s\"", chart)
+}
+
+func resolveRemoteChart(repoAndChart string) (string, string, bool) {
+	parts := strings.Split(repoAndChart, "/")
+	if isLocalChart(repoAndChart) {
+		return "", "", false
+	}
+	if len(parts) != 2 {
+		panic(fmt.Sprintf("unsupported format of chart name: %s", repoAndChart))
+	}
+
+	repo := parts[0]
+	chart := parts[1]
+
+	return repo, chart, true
+}
+
+func (st *HelmState) mergeLockedDependencies() (*HelmState, error) {
+	filename, unresolved, err := getUnresolvedDependenciess(st)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(unresolved.deps) == 0 {
+		return st, nil
+	}
+
+	depMan := NewChartDependencyManager(filename, st.logger)
+
+	if st.readFile != nil {
+		depMan.readFile = st.readFile
+	}
+
+	return resolveDependencies(st, depMan, unresolved)
+}
+
+func resolveDependencies(st *HelmState, depMan *chartDependencyManager, unresolved *UnresolvedDependencies) (*HelmState, error) {
+	resolved, lockfileExists, err := depMan.Resolve(unresolved)
+	if err != nil {
+		return nil, fmt.Errorf("unable to resolve %d deps: %v", len(unresolved.deps), err)
+	}
+	if !lockfileExists {
+		return st, nil
+	}
+
+	repoToURL := map[string]string{}
+
+	for _, r := range st.Repositories {
+		repoToURL[r.Name] = r.URL
+	}
+
+	updated := *st
+	for i, r := range updated.Releases {
+		repo, chart, ok := resolveRemoteChart(r.Chart)
+		if !ok {
+			continue
+		}
+
+		_, ok = repoToURL[repo]
+		// Skip this chart from dependency management, as there's no matching `repository` in the helmfile state,
+		// which may imply that this is a local chart within a directory, like `charts/myapp`
+		if !ok {
+			continue
+		}
+
+		ver, err := resolved.Get(chart, r.Version)
+		if err != nil {
+			return nil, err
+		}
+
+		updated.Releases[i].Version = ver
+	}
+
+	return &updated, nil
+}
+
+func (st *HelmState) updateDependenciesInTempDir(shell helmexec.DependencyUpdater, tempDir func(string, string) (string, error)) (*HelmState, error) {
+	filename, unresolved, err := getUnresolvedDependenciess(st)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(unresolved.deps) == 0 {
+		return st, nil
+	}
+
+	d, err := tempDir("", "")
+	if err != nil {
+		return nil, fmt.Errorf("unable to create dir: %v", err)
+	}
+	defer os.RemoveAll(d)
+
+	return updateDependencies(st, shell, unresolved, filename, d)
+}
+
+func getUnresolvedDependenciess(st *HelmState) (string, *UnresolvedDependencies, error) {
+	repoToURL := map[string]string{}
+
+	for _, r := range st.Repositories {
+		repoToURL[r.Name] = r.URL
+	}
+
+	unresolved := &UnresolvedDependencies{deps: map[string][]unresolvedChartDependency{}}
+	//if err := unresolved.Add("stable/envoy", "https://kubernetes-charts.storage.googleapis.com", ""); err != nil {
+	//	panic(err)
+	//}
+
+	for _, r := range st.Releases {
+		repo, chart, ok := resolveRemoteChart(r.Chart)
+		if !ok {
+			continue
+		}
+
+		url, ok := repoToURL[repo]
+		// Skip this chart from dependency management, as there's no matching `repository` in the helmfile state,
+		// which may imply that this is a local chart within a directory, like `charts/myapp`
+		if !ok {
+			continue
+		}
+
+		if err := unresolved.Add(chart, url, r.Version); err != nil {
+			return "", nil, err
+		}
+	}
+
+	filename := filepath.Base(st.FilePath)
+	filename = strings.TrimSuffix(filename, ".gotmpl")
+	filename = strings.TrimSuffix(filename, ".yaml")
+	filename = strings.TrimSuffix(filename, ".yml")
+
+	return filename, unresolved, nil
+}
+
+func updateDependencies(st *HelmState, shell helmexec.DependencyUpdater, unresolved *UnresolvedDependencies, filename, wd string) (*HelmState, error) {
+	depMan := NewChartDependencyManager(filename, st.logger)
+
+	_, err := depMan.Update(shell, wd, unresolved)
+	if err != nil {
+		return nil, fmt.Errorf("unable to resolve %d deps: %v", len(unresolved.deps), err)
+	}
+
+	return resolveDependencies(st, depMan, unresolved)
+}
+
+type chartDependencyManager struct {
+	Name string
+
+	logger *zap.SugaredLogger
+
+	readFile  func(string) ([]byte, error)
+	writeFile func(string, []byte, os.FileMode) error
+}
+
+func NewChartDependencyManager(name string, logger *zap.SugaredLogger) *chartDependencyManager {
+	return &chartDependencyManager{
+		Name:      name,
+		readFile:  ioutil.ReadFile,
+		writeFile: ioutil.WriteFile,
+		logger:    logger,
+	}
+}
+
+func (m *chartDependencyManager) lockFileName() string {
+	return fmt.Sprintf("%s.lock", m.Name)
+}
+
+func (m *chartDependencyManager) Update(shell helmexec.DependencyUpdater, wd string, unresolved *UnresolvedDependencies) (*ResolvedDependencies, error) {
+	// Generate `Chart.yaml` of the temporary local chart
+	if err := m.writeBytes(filepath.Join(wd, "Chart.yaml"), []byte(fmt.Sprintf("name: %s\n", m.Name))); err != nil {
+		return nil, err
+	}
+
+	// Generate `requirements.yaml` of the temporary local chart from the helmfile state
+	reqsContent, err := yaml.Marshal(unresolved.ToChartRequirements())
+	if err != nil {
+		return nil, err
+	}
+	if err := m.writeBytes(filepath.Join(wd, "requirements.yaml"), reqsContent); err != nil {
+		return nil, err
+	}
+
+	// Generate `requirements.lock` of the temporary local chart by coping `<basename>.lock`
+	lockFile := m.lockFileName()
+
+	lockFileContent, err := m.readBytes(lockFile)
+	if err != nil && !os.IsNotExist(err) {
+		return nil, err
+	}
+
+	if lockFileContent != nil {
+		if err := m.writeBytes(filepath.Join(wd, "requirements.lock"), lockFileContent); err != nil {
+			return nil, err
+		}
+	}
+
+	// Update the lock file by running `helm dependency update`
+	if err := shell.UpdateDeps(wd); err != nil {
+		return nil, err
+	}
+
+	updatedLockFileContent, err := m.readBytes(filepath.Join(wd, "requirements.lock"))
+	if err != nil {
+		return nil, err
+	}
+
+	// Commit the lock file if and only if everything looks ok
+	if err := m.writeBytes(lockFile, updatedLockFileContent); err != nil {
+		return nil, err
+	}
+
+	resolved, _, err := m.Resolve(unresolved)
+	return resolved, err
+}
+
+func (m *chartDependencyManager) Resolve(unresolved *UnresolvedDependencies) (*ResolvedDependencies, bool, error) {
+	updatedLockFileContent, err := m.readBytes(m.lockFileName())
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, false, nil
+		}
+		return nil, false, err
+	}
+
+	// Load resolved dependencies into memory
+	lockedReqs := &ChartLockedRequirements{}
+	if err := yaml.Unmarshal(updatedLockFileContent, lockedReqs); err != nil {
+		return nil, false, err
+	}
+
+	resolved := &ResolvedDependencies{deps: map[string][]ResolvedChartDependency{}}
+	for _, d := range lockedReqs.ResolvedDependencies {
+		if err := resolved.add(d); err != nil {
+			return nil, false, err
+		}
+	}
+
+	return resolved, true, nil
+}
+
+func (m *chartDependencyManager) readBytes(filename string) ([]byte, error) {
+	bytes, err := m.readFile(filename)
+	if err != nil {
+		return nil, err
+	}
+	m.logger.Debugf("readBytes: read from %s:\n%s", filename, bytes)
+	return bytes, nil
+}
+
+func (m *chartDependencyManager) writeBytes(filename string, data []byte) error {
+	err := m.writeFile(filename, data, 0644)
+	if err != nil {
+		return err
+	}
+	m.logger.Debugf("writeBytes: wrote to %s:\n%s", filename, data)
+	return nil
+}

pkg/state/create.go

@@ -0,0 +1,239 @@
+package state
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"github.com/imdario/mergo"
+	"github.com/roboll/helmfile/pkg/environment"
+	"github.com/roboll/helmfile/pkg/helmexec"
+	"go.uber.org/zap"
+	"gopkg.in/yaml.v2"
+	"io"
+	"os"
+)
+
+type StateLoadError struct {
+	msg   string
+	Cause 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
+}
+
+type StateCreator struct {
+	logger     *zap.SugaredLogger
+	readFile   func(string) ([]byte, error)
+	fileExists func(string) (bool, error)
+	abs        func(string) (string, error)
+	glob       func(string) ([]string, error)
+
+	Strict bool
+
+	LoadFile func(inheritedEnv *environment.Environment, baseDir, file string, evaluateBases bool) (*HelmState, error)
+}
+
+func NewCreator(logger *zap.SugaredLogger, readFile func(string) ([]byte, error), fileExists func(string) (bool, error), abs func(string) (string, error), glob func(string) ([]string, error)) *StateCreator {
+	return &StateCreator{
+		logger:     logger,
+		readFile:   readFile,
+		fileExists: fileExists,
+		abs:        abs,
+		glob:       glob,
+		Strict:     true,
+	}
+}
+
+// Parse parses YAML into HelmState
+func (c *StateCreator) Parse(content []byte, baseDir, file string) (*HelmState, error) {
+	var state HelmState
+
+	state.FilePath = file
+	state.basePath = baseDir
+
+	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 {
+			return nil, fmt.Errorf("failed to parse %s: you can't specify both `charts` and `releases` sections", file)
+		}
+		state.Releases = state.DeprecatedReleases
+		state.DeprecatedReleases = []ReleaseSpec{}
+	}
+
+	if state.DeprecatedContext != "" && state.HelmDefaults.KubeContext == "" {
+		state.HelmDefaults.KubeContext = state.DeprecatedContext
+	}
+
+	state.logger = c.logger
+
+	state.readFile = c.readFile
+	state.removeFile = os.Remove
+	state.fileExists = c.fileExists
+	state.glob = c.glob
+
+	return &state, nil
+}
+
+// LoadEnvValues loads environment values files relative to the `baseDir`
+func (c *StateCreator) LoadEnvValues(target *HelmState, env string, ctxEnv *environment.Environment) (*HelmState, error) {
+	state := *target
+
+	e, err := state.loadEnvValues(env, ctxEnv, c.readFile, c.glob)
+	if err != nil {
+		return nil, &StateLoadError{fmt.Sprintf("failed to read %s", state.FilePath), err}
+	}
+	state.Env = *e
+
+	return &state, nil
+}
+
+// Parses YAML into HelmState, while loading environment values files relative to the `baseDir`
+func (c *StateCreator) ParseAndLoad(content []byte, baseDir, file string, envName string, evaluateBases bool, envValues *environment.Environment) (*HelmState, error) {
+	state, err := c.Parse(content, baseDir, file)
+	if err != nil {
+		return nil, err
+	}
+
+	if !evaluateBases {
+		if len(state.Bases) > 0 {
+			return nil, errors.New("nested `base` helmfile is unsupported. please submit a feature request if you need this!")
+		}
+	}
+
+	state, err = c.loadBases(envValues, state, baseDir)
+	if err != nil {
+		return nil, err
+	}
+
+	return c.LoadEnvValues(state, envName, envValues)
+}
+
+func (c *StateCreator) loadBases(envValues *environment.Environment, st *HelmState, baseDir string) (*HelmState, error) {
+	layers := []*HelmState{}
+	for _, b := range st.Bases {
+		base, err := c.LoadFile(envValues, baseDir, b, false)
+		if err != nil {
+			return nil, err
+		}
+		layers = append(layers, base)
+	}
+	layers = append(layers, st)
+
+	for i := 1; i < len(layers); i++ {
+		if err := mergo.Merge(layers[0], layers[i], mergo.WithAppendSlice); err != nil {
+			return nil, err
+		}
+	}
+
+	return layers[0], nil
+}
+
+func (st *HelmState) loadEnvValues(name string, ctxEnv *environment.Environment, readFile func(string) ([]byte, error), glob func(string) ([]string, error)) (*environment.Environment, error) {
+	envVals := map[string]interface{}{}
+	envSpec, ok := st.Environments[name]
+	if ok {
+		envValues := append([]interface{}{}, envSpec.Values...)
+		ld := &EnvironmentValuesLoader{
+			storage:  st.storage(),
+			readFile: st.readFile,
+		}
+		var err error
+		envVals, err = ld.LoadEnvironmentValues(envSpec.MissingFileHandler, envValues)
+		if err != nil {
+			return nil, err
+		}
+
+		if len(envSpec.Secrets) > 0 {
+			helm := helmexec.New(st.logger, "")
+
+			var envSecretFiles []string
+			for _, urlOrPath := range envSpec.Secrets {
+				resolved, skipped, err := st.storage().resolveFile(envSpec.MissingFileHandler, "environment values", urlOrPath)
+				if err != nil {
+					return nil, err
+				}
+				if skipped {
+					continue
+				}
+
+				envSecretFiles = append(envSecretFiles, resolved...)
+			}
+
+			for _, path := range envSecretFiles {
+				// 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
+				}
+				bytes, err := readFile(decFile)
+				if err != nil {
+					return nil, fmt.Errorf("failed to load environment secrets file \"%s\": %v", path, err)
+				}
+				m := map[string]interface{}{}
+				if err := yaml.Unmarshal(bytes, &m); err != nil {
+					return nil, fmt.Errorf("failed to load environment secrets file \"%s\": %v", path, err)
+				}
+				if err := mergo.Merge(&envVals, &m, mergo.WithOverride); err != nil {
+					return nil, fmt.Errorf("failed to load \"%s\": %v", path, err)
+				}
+			}
+		}
+	} else if ctxEnv == nil && name != DefaultEnv {
+		return nil, &UndefinedEnvError{msg: fmt.Sprintf("environment \"%s\" is not defined", name)}
+	}
+
+	newEnv := &environment.Environment{Name: name, Values: envVals}
+
+	if ctxEnv != nil {
+		intEnv := *ctxEnv
+
+		if err := mergo.Merge(&intEnv, newEnv, mergo.WithOverride); err != nil {
+			return nil, fmt.Errorf("error while merging environment values for \"%s\": %v", name, err)
+		}
+
+		newEnv = &intEnv
+	}
+
+	return newEnv, nil
+}

pkg/state/create_test.go

@@ -1,12 +1,26 @@
 package state
 
 import (
-	"fmt"
+	"go.uber.org/zap"
+	"io/ioutil"
 	"path/filepath"
 	"reflect"
 	"testing"
+
+	. "gotest.tools/assert"
+	"gotest.tools/assert/cmp"
 )
 
+func createFromYaml(content []byte, file string, env string, logger *zap.SugaredLogger) (*HelmState, error) {
+	c := &StateCreator{
+		logger:   logger,
+		readFile: ioutil.ReadFile,
+		abs:      filepath.Abs,
+		Strict:   true,
+	}
+	return c.ParseAndLoad(content, filepath.Dir(file), file, env, false, nil)
+}
+
 func TestReadFromYaml(t *testing.T) {
 	yamlFile := "example/path/to/yaml/file"
 	yamlContent := []byte(`releases:
@@ -84,23 +98,17 @@ bar: {{ readFile "bar.txt" }}
 
 	expectedValues := `env: production`
 
-	readFile := func(filename string) ([]byte, error) {
-		switch filename {
-		case fooYamlFile:
-			return fooYamlContent, nil
-		case barYamlFile:
-			return barYamlContent, nil
-		case barTextFile:
-			return barTextContent, nil
-		case valuesFile:
-			return valuesContent, nil
-		}
-		return nil, fmt.Errorf("unexpected filename: %s", filename)
-	}
+	testFs := NewTestFs(map[string]string{
+		fooYamlFile: string(fooYamlContent),
+		barYamlFile: string(barYamlContent),
+		barTextFile: string(barTextContent),
+		valuesFile:  string(valuesContent),
+	})
+	testFs.Cwd = "/example/path/to"
 
-	state, err := NewCreator(logger, readFile, filepath.Abs).CreateFromYaml(yamlContent, yamlFile, "production")
+	state, err := NewCreator(logger, testFs.ReadFile, testFs.FileExists, testFs.Abs, testFs.Glob).ParseAndLoad(yamlContent, filepath.Dir(yamlFile), yamlFile, "production", false, nil)
 	if err != nil {
-		t.Errorf("unexpected error: %v", err)
+		t.Fatalf("unexpected error: %v", err)
 	}
 
 	actual := state.Env.Values
@@ -247,3 +255,95 @@ 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)
+	}
+}

pkg/state/environment.go

@@ -0,0 +1,15 @@
+package state
+
+type EnvironmentSpec struct {
+	Values  []interface{} `yaml:"values"`
+	Secrets []string      `yaml:"secrets"`
+
+	// MissingFileHandler instructs helmfile to fail when unable to find a environment values file listed
+	// under `environments.NAME.values`.
+	//
+	// Possible values are  "Error", "Warn", "Info", "Debug". The default is "Error".
+	//
+	// Use "Warn", "Info", or "Debug" if you want helmfile to not fail when a values file is missing, while just leaving
+	// a message about the missing file at the log-level.
+	MissingFileHandler *string `yaml:"missingFileHandler"`
+}

pkg/state/environment_values_loader.go

@@ -0,0 +1,71 @@
+package state
+
+import (
+	"fmt"
+	"github.com/imdario/mergo"
+	"github.com/roboll/helmfile/pkg/environment"
+	"github.com/roboll/helmfile/pkg/maputil"
+	"github.com/roboll/helmfile/pkg/tmpl"
+	"gopkg.in/yaml.v2"
+	"path/filepath"
+)
+
+type EnvironmentValuesLoader struct {
+	storage *Storage
+
+	readFile func(string) ([]byte, error)
+}
+
+func NewEnvironmentValuesLoader(storage *Storage, readFile func(string) ([]byte, error)) *EnvironmentValuesLoader {
+	return &EnvironmentValuesLoader{
+		storage:  storage,
+		readFile: readFile,
+	}
+}
+
+func (ld *EnvironmentValuesLoader) LoadEnvironmentValues(missingFileHandler *string, envValues []interface{}) (map[string]interface{}, error) {
+	envVals := map[string]interface{}{}
+
+	for _, v := range envValues {
+		switch typedValue := v.(type) {
+		case string:
+			urlOrPath := typedValue
+			resolved, skipped, err := ld.storage.resolveFile(missingFileHandler, "environment values", urlOrPath)
+			if err != nil {
+				return nil, err
+			}
+			if skipped {
+				continue
+			}
+
+			for _, envvalFullPath := range resolved {
+				tmplData := EnvironmentTemplateData{Environment: environment.EmptyEnvironment, Namespace: ""}
+				r := tmpl.NewFileRenderer(ld.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", envvalFullPath, err)
+				}
+				m := map[string]interface{}{}
+				if err := yaml.Unmarshal(bytes, &m); err != nil {
+					return nil, fmt.Errorf("failed to load environment values file \"%s\": %v", envvalFullPath, err)
+				}
+				if err := mergo.Merge(&envVals, &m, mergo.WithOverride); err != nil {
+					return nil, fmt.Errorf("failed to load \"%s\": %v", envvalFullPath, err)
+				}
+			}
+		case map[interface{}]interface{}:
+			m, err := maputil.CastKeysToStrings(typedValue)
+			if err != nil {
+				return nil, err
+			}
+			if err := mergo.Merge(&envVals, &m, mergo.WithOverride); err != nil {
+				return nil, fmt.Errorf("failed to merge %v: %v", typedValue, err)
+			}
+			continue
+		default:
+			return nil, fmt.Errorf("unexpected type of value: value=%v, type=%T", typedValue, typedValue)
+		}
+	}
+
+	return envVals, nil
+}

pkg/state/release.go

@@ -0,0 +1,73 @@
+package state
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/pkg/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
+}

pkg/state/release_error.go

@@ -0,0 +1,21 @@
+package state
+
+import (
+	"fmt"
+)
+
+const ReleaseErrorCodeFailure = 1
+
+type ReleaseError struct {
+	*ReleaseSpec
+	err  error
+	Code int
+}
+
+func (e *ReleaseError) Error() string {
+	return fmt.Sprintf("failed processing release %s: %v", e.Name, e.err.Error())
+}
+
+func newReleaseError(release *ReleaseSpec, err error) *ReleaseError {
+	return &ReleaseError{release, err, ReleaseErrorCodeFailure}
+}

pkg/state/state_exec_tmpl.go

@@ -0,0 +1,32 @@
+package state
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/pkg/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
+}

pkg/state/state_exec_tmpl_test.go

@@ -0,0 +1,76 @@
+package state
+
+import (
+	"github.com/roboll/helmfile/pkg/environment"
+	"reflect"
+	"testing"
+)
+
+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 i := range tests {
+		tt := tests[i]
+		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)
+			}
+		})
+	}
+}

pkg/state/state_run.go

@@ -0,0 +1,89 @@
+package state
+
+import (
+	"fmt"
+	"github.com/roboll/helmfile/pkg/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
+}

pkg/state/storage.go

@@ -0,0 +1,99 @@
+package state
+
+import (
+	"fmt"
+	"go.uber.org/zap"
+	"net/url"
+	"path/filepath"
+	"sort"
+)
+
+type Storage struct {
+	logger *zap.SugaredLogger
+
+	FilePath string
+
+	basePath string
+	glob     func(string) ([]string, error)
+}
+
+func NewStorage(forFile string, logger *zap.SugaredLogger, glob func(string) ([]string, error)) *Storage {
+	return &Storage{
+		FilePath: forFile,
+		basePath: filepath.Dir(forFile),
+		logger:   logger,
+		glob:     glob,
+	}
+}
+
+func (st *Storage) resolveFile(missingFileHandler *string, tpe, path string) ([]string, bool, error) {
+	title := fmt.Sprintf("%s file", tpe)
+
+	files, err := st.ExpandPaths(path)
+	if err != nil {
+		return nil, false, err
+	}
+
+	var handlerId string
+
+	if missingFileHandler != nil {
+		handlerId = *missingFileHandler
+	} else {
+		handlerId = MissingFileHandlerError
+	}
+
+	if len(files) == 0 {
+		switch handlerId {
+		case MissingFileHandlerError:
+			return nil, false, fmt.Errorf("%s matching \"%s\" does not exist in \"%s\"", title, path, st.basePath)
+		case MissingFileHandlerWarn:
+			st.logger.Warnf("skipping missing %s matching \"%s\"", title, path)
+			return nil, true, nil
+		case MissingFileHandlerInfo:
+			st.logger.Infof("skipping missing %s matching \"%s\"", title, path)
+			return nil, true, nil
+		case MissingFileHandlerDebug:
+			st.logger.Debugf("skipping missing %s matching \"%s\"", title, path)
+			return nil, true, nil
+		default:
+			available := []string{
+				MissingFileHandlerError,
+				MissingFileHandlerWarn,
+				MissingFileHandlerInfo,
+				MissingFileHandlerDebug,
+			}
+			return nil, false, fmt.Errorf("invalid missing file handler \"%s\" while processing \"%s\" in \"%s\": it must be one of %s", handlerId, path, st.FilePath, available)
+		}
+	}
+
+	return files, false, nil
+}
+
+func (st *Storage) ExpandPaths(globPattern string) ([]string, error) {
+	result := []string{}
+	absPathPattern := st.normalizePath(globPattern)
+	matches, err := st.glob(absPathPattern)
+	if err != nil {
+		return nil, fmt.Errorf("failed processing %s: %v", globPattern, err)
+	}
+
+	sort.Strings(matches)
+
+	result = append(result, matches...)
+	return result, nil
+}
+
+// normalizes relative path to absolute one
+func (st *Storage) normalizePath(path string) string {
+	u, _ := url.Parse(path)
+	if u.Scheme != "" || filepath.IsAbs(path) {
+		return path
+	} else {
+		return st.JoinBase(path)
+	}
+}
+
+// JoinBase returns an absolute path in the form basePath/relative
+func (st *Storage) JoinBase(relPath string) string {
+	return filepath.Join(st.basePath, relPath)
+}

pkg/state/testfs.go

@@ -0,0 +1,134 @@
+package state
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+)
+
+type TestFs struct {
+	Cwd   string
+	dirs  map[string]bool
+	files map[string]string
+
+	GlobFixtures map[string][]string
+
+	fileReaderCalls int
+	successfulReads []string
+}
+
+func NewTestFs(files map[string]string) *TestFs {
+	dirs := map[string]bool{}
+	for abs, _ := range files {
+		d := filepath.Dir(abs)
+		dirs[d] = true
+	}
+	return &TestFs{
+		Cwd:   "/path/to",
+		dirs:  dirs,
+		files: files,
+
+		successfulReads: []string{},
+
+		GlobFixtures: map[string][]string{},
+	}
+}
+
+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.Cwd, path)]
+	}
+	return ok
+}
+
+func (f *TestFs) FileExists(path string) (bool, error) {
+	return f.FileExistsAt(path), nil
+}
+
+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.Cwd, path)]
+	}
+	return ok
+}
+
+func (f *TestFs) ReadFile(filename string) ([]byte, error) {
+	var str string
+	var ok bool
+	if filename[0] == '/' {
+		str, ok = f.files[filename]
+	} else {
+		str, ok = f.files[filepath.Join(f.Cwd, filename)]
+	}
+	if !ok {
+		return []byte(nil), fmt.Errorf("no registered file found: %s", filename)
+	}
+
+	f.fileReaderCalls += 1
+
+	f.successfulReads = append(f.successfulReads, filename)
+
+	return []byte(str), nil
+}
+
+func (f *TestFs) SuccessfulReads() []string {
+	return f.successfulReads
+}
+
+func (f *TestFs) FileReaderCalls() int {
+	return f.fileReaderCalls
+}
+
+func (f *TestFs) Glob(relPattern string) ([]string, error) {
+	var pattern string
+	if relPattern[0] == '/' {
+		pattern = relPattern
+	} else {
+		pattern = filepath.Join(f.Cwd, relPattern)
+	}
+
+	fixtures, ok := f.GlobFixtures[pattern]
+	if ok {
+		return fixtures, nil
+	}
+
+	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)
+		}
+	}
+	return matches, nil
+}
+
+func (f *TestFs) Abs(path string) (string, error) {
+	var p string
+	if path[0] == '/' {
+		p = path
+	} else {
+		p = filepath.Join(f.Cwd, path)
+	}
+	return filepath.Clean(p), nil
+}
+
+func (f *TestFs) Getwd() (string, error) {
+	return f.Cwd, nil
+}
+
+func (f *TestFs) Chdir(dir string) error {
+	if _, ok := f.dirs[dir]; ok {
+		f.Cwd = dir
+		return nil
+	}
+	return fmt.Errorf("unexpected chdir \"%s\"", dir)
+}

pkg/state/types.go

@@ -0,0 +1,26 @@
+package state
+
+import (
+	"github.com/roboll/helmfile/pkg/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
+}

pkg/tmpl/context_funcs.go

@@ -24,6 +24,7 @@ func (c *Context) createFuncMap() template.FuncMap {
 		"requiredEnv":    RequiredEnv,
 		"get":            get,
 		"getOrNil":       getOrNil,
+		"tpl":            c.Tpl,
 	}
 	if c.preRender {
 		// disable potential side-effect template calls
@@ -114,7 +115,12 @@ func (c *Context) Exec(command string, args []interface{}, inputs ...string) (st
 }
 
 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 {
@@ -123,6 +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 {

pkg/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)
+	}
+}

pkg/tmpl/context_tmpl.go

@@ -13,9 +13,9 @@ func (c *Context) stringTemplate() *template.Template {
 	}
 	tmpl := template.New("stringTemplate").Funcs(funcMap)
 	if c.preRender {
-		tmpl.Option("missingkey=zero")
+		tmpl = tmpl.Option("missingkey=zero")
 	} else {
-		tmpl.Option("missingkey=error")
+		tmpl = tmpl.Option("missingkey=error")
 	}
 	return tmpl
 }

pkg/tmpl/context_tmpl_test.go

@@ -110,11 +110,11 @@ func TestRenderTemplate_Defaulting(t *testing.T) {
 	}
 }
 
-func renderTemplateToString(s string) (string, error) {
+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
 	}
@@ -125,6 +125,7 @@ func Test_renderTemplateToString(t *testing.T) {
 	type args struct {
 		s    string
 		envs map[string]string
+		data interface{}
 	}
 	tests := []struct {
 		name    string
@@ -177,6 +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{
@@ -217,7 +230,8 @@ func Test_renderTemplateToString(t *testing.T) {
 			wantErr: true,
 		},
 	}
-	for _, tt := range tests {
+	for i := range tests {
+		tt := tests[i]
 		t.Run(tt.name, func(t *testing.T) {
 			for k, v := range tt.args.envs {
 				err := os.Setenv(k, v)
@@ -225,7 +239,7 @@ 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

pkg/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
+}

pkg/tmpl/file_renderer_test.go

@@ -1,12 +1,17 @@
-package valuesfile
+package tmpl
 
 import (
 	"fmt"
-	"github.com/roboll/helmfile/environment"
+	"github.com/roboll/helmfile/pkg/environment"
 	"reflect"
 	"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)

pkg/tmpl/get_or_nil.go

@@ -14,36 +14,67 @@ func (e *noValueError) Error() string {
 	return e.msg
 }
 
-func get(path string, obj interface{}) (interface{}, error) {
+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]]
+		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)}
 		}
-		return get(strings.Join(keys[1:], "."), v)
 	case map[interface{}]interface{}:
-		v, ok := typedObj[keys[0]]
+		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)}
 		}
-		return get(strings.Join(keys[1:], "."), v)
 	default:
 		maybeStruct := reflect.ValueOf(typedObj)
-		if maybeStruct.NumField() < 1 {
+		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()
-		return get(strings.Join(keys[1:], "."), v)
+		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) {

pkg/tmpl/get_or_nil_test.go

@@ -4,6 +4,9 @@ import (
 	"testing"
 )
 
+type EmptyStruct struct {
+}
+
 func TestGetStruct(t *testing.T) {
 	type Foo struct{ Bar string }
 
@@ -23,6 +26,12 @@ func TestGetStruct(t *testing.T) {
 	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) {
@@ -44,6 +53,34 @@ func TestGetMap(t *testing.T) {
 	}
 }
 
+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 }
 

state/create.go

@@ -1,171 +0,0 @@
-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"
-)
-
-type StateLoadError struct {
-	msg   string
-	Cause 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
-
-	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 {
-			return nil, fmt.Errorf("failed to parse %s: you can't specify both `charts` and `releases` sections", file)
-		}
-		state.Releases = state.DeprecatedReleases
-		state.DeprecatedReleases = []ReleaseSpec{}
-	}
-
-	if state.DeprecatedContext != "" && state.HelmDefaults.KubeContext == "" {
-		state.HelmDefaults.KubeContext = state.DeprecatedContext
-	}
-
-	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
-
-	return &state, nil
-}
-
-func (state *HelmState) loadEnv(name string, readFile func(string) ([]byte, error)) (*environment.Environment, error) {
-	envVals := map[string]interface{}{}
-	envSpec, ok := state.Environments[name]
-	if ok {
-		for _, envvalFile := range envSpec.Values {
-			envvalFullPath := filepath.Join(state.basePath, envvalFile)
-			r := valuesfile.NewRenderer(readFile, filepath.Dir(envvalFullPath), environment.EmptyEnvironment)
-			bytes, err := r.RenderToBytes(envvalFullPath)
-			if err != nil {
-				return nil, fmt.Errorf("failed to load environment values file \"%s\": %v", envvalFile, err)
-			}
-			m := map[string]interface{}{}
-			if err := yaml.Unmarshal(bytes, &m); err != nil {
-				return nil, fmt.Errorf("failed to load environment values file \"%s\": %v", envvalFile, err)
-			}
-			if err := mergo.Merge(&envVals, &m, mergo.WithOverride); err != nil {
-				return nil, fmt.Errorf("failed to load \"%s\": %v", envvalFile, err)
-			}
-		}
-
-		if len(envSpec.Secrets) > 0 {
-			helm := helmexec.New(state.logger, "")
-			for _, secFile := range envSpec.Secrets {
-				path := filepath.Join(state.basePath, secFile)
-				if _, err := os.Stat(path); os.IsNotExist(err) {
-					return nil, err
-				}
-
-				decFile, err := helm.DecryptSecret(path)
-				if err != nil {
-					return nil, err
-				}
-				bytes, err := readFile(decFile)
-				if err != nil {
-					return nil, fmt.Errorf("failed to load environment secrets file \"%s\": %v", secFile, err)
-				}
-				m := map[string]interface{}{}
-				if err := yaml.Unmarshal(bytes, &m); err != nil {
-					return nil, fmt.Errorf("failed to load environment secrets file \"%s\": %v", secFile, err)
-				}
-				if err := mergo.Merge(&envVals, &m, mergo.WithOverride); err != nil {
-					return nil, fmt.Errorf("failed to load \"%s\": %v", secFile, err)
-				}
-			}
-		}
-	} else if name != DefaultEnv {
-		return nil, &UndefinedEnvError{msg: fmt.Sprintf("environment \"%s\" is not defined", name)}
-	}
-
-	return &environment.Environment{Name: name, Values: envVals}, nil
-}

state/environment.go

@@ -1,6 +0,0 @@
-package state
-
-type EnvironmentSpec struct {
-	Values  []string `yaml:"values"`
-	Secrets []string `yaml:"secrets"`
-}

state/state_test.go

@@ -1,936 +0,0 @@
-package state
-
-import (
-	"os"
-	"reflect"
-	"testing"
-
-	"errors"
-	"strings"
-
-	"github.com/roboll/helmfile/helmexec"
-)
-
-var logger = helmexec.NewLogger(os.Stdout, "warn")
-
-func TestLabelParsing(t *testing.T) {
-	cases := []struct {
-		labelString    string
-		expectedFilter LabelFilter
-		errorExected   bool
-	}{
-		{"foo=bar", LabelFilter{positiveLabels: [][]string{[]string{"foo", "bar"}}, negativeLabels: [][]string{}}, false},
-		{"foo!=bar", LabelFilter{positiveLabels: [][]string{}, negativeLabels: [][]string{[]string{"foo", "bar"}}}, false},
-		{"foo!=bar,baz=bat", LabelFilter{positiveLabels: [][]string{[]string{"baz", "bat"}}, negativeLabels: [][]string{[]string{"foo", "bar"}}}, false},
-		{"foo", LabelFilter{positiveLabels: [][]string{}, negativeLabels: [][]string{}}, true},
-		{"foo!=bar=baz", LabelFilter{positiveLabels: [][]string{}, negativeLabels: [][]string{}}, true},
-		{"=bar", LabelFilter{positiveLabels: [][]string{}, negativeLabels: [][]string{}}, true},
-	}
-	for idx, c := range cases {
-		filter, err := ParseLabels(c.labelString)
-		if err != nil && !c.errorExected {
-			t.Errorf("[%d] Didn't expect an error parsing labels: %s", idx, err)
-		} else if err == nil && c.errorExected {
-			t.Errorf("[%d] Expected %s to result in an error but got none", idx, c.labelString)
-		} else if !reflect.DeepEqual(filter, c.expectedFilter) {
-			t.Errorf("[%d] parsed label did not result in expected filter: %v, expected: %v", idx, filter, c.expectedFilter)
-		}
-	}
-}
-
-func TestHelmState_applyDefaultsTo(t *testing.T) {
-	type fields struct {
-		BaseChartPath      string
-		Context            string
-		DeprecatedReleases []ReleaseSpec
-		Namespace          string
-		Repositories       []RepositorySpec
-		Releases           []ReleaseSpec
-	}
-	type args struct {
-		spec ReleaseSpec
-	}
-	verify := false
-	specWithNamespace := ReleaseSpec{
-		Chart:     "test/chart",
-		Version:   "0.1",
-		Verify:    &verify,
-		Name:      "test-charts",
-		Namespace: "test-namespace",
-		Values:    nil,
-		SetValues: nil,
-		EnvValues: nil,
-	}
-
-	specWithoutNamespace := specWithNamespace
-	specWithoutNamespace.Namespace = ""
-	specWithNamespaceFromFields := specWithNamespace
-	specWithNamespaceFromFields.Namespace = "test-namespace-field"
-
-	fieldsWithNamespace := fields{
-		BaseChartPath:      ".",
-		Context:            "test_context",
-		DeprecatedReleases: nil,
-		Namespace:          specWithNamespaceFromFields.Namespace,
-		Repositories:       nil,
-		Releases: []ReleaseSpec{
-			specWithNamespace,
-		},
-	}
-
-	fieldsWithoutNamespace := fieldsWithNamespace
-	fieldsWithoutNamespace.Namespace = ""
-
-	tests := []struct {
-		name   string
-		fields fields
-		args   args
-		want   ReleaseSpec
-	}{
-		{
-			name:   "Has a namespace from spec",
-			fields: fieldsWithoutNamespace,
-			args: args{
-				spec: specWithNamespace,
-			},
-			want: specWithNamespace,
-		},
-		{
-			name:   "Has a namespace from flags",
-			fields: fieldsWithoutNamespace,
-			args: args{
-				spec: specWithNamespace,
-			},
-			want: specWithNamespace,
-		},
-		{
-			name:   "Has a namespace from flags and from spec",
-			fields: fieldsWithNamespace,
-			args: args{
-				spec: specWithNamespace,
-			},
-			want: specWithNamespaceFromFields,
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			state := &HelmState{
-				basePath:           tt.fields.BaseChartPath,
-				DeprecatedContext:  tt.fields.Context,
-				DeprecatedReleases: tt.fields.DeprecatedReleases,
-				Namespace:          tt.fields.Namespace,
-				Repositories:       tt.fields.Repositories,
-				Releases:           tt.fields.Releases,
-			}
-			if state.applyDefaultsTo(&tt.args.spec); !reflect.DeepEqual(tt.args.spec, tt.want) {
-				t.Errorf("HelmState.applyDefaultsTo() = %v, want %v", tt.args.spec, tt.want)
-			}
-		})
-	}
-}
-
-func TestHelmState_flagsForUpgrade(t *testing.T) {
-	enable := true
-	disable := false
-
-	some := func(v int) *int {
-		return &v
-	}
-
-	tests := []struct {
-		name     string
-		defaults HelmSpec
-		release  *ReleaseSpec
-		want     []string
-	}{
-		{
-			name: "no-options",
-			defaults: HelmSpec{
-				Verify: false,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Verify:    &disable,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "verify",
-			defaults: HelmSpec{
-				Verify: false,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Verify:    &enable,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--verify",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "verify-from-default",
-			defaults: HelmSpec{
-				Verify: true,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Verify:    &disable,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--verify",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "force",
-			defaults: HelmSpec{
-				Force: false,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Force:     &enable,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--force",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "force-from-default",
-			defaults: HelmSpec{
-				Force: true,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Force:     &disable,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--force",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "recreate-pods",
-			defaults: HelmSpec{
-				RecreatePods: false,
-			},
-			release: &ReleaseSpec{
-				Chart:        "test/chart",
-				Version:      "0.1",
-				RecreatePods: &enable,
-				Name:         "test-charts",
-				Namespace:    "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--recreate-pods",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "recreate-pods-from-default",
-			defaults: HelmSpec{
-				RecreatePods: true,
-			},
-			release: &ReleaseSpec{
-				Chart:        "test/chart",
-				Version:      "0.1",
-				RecreatePods: &disable,
-				Name:         "test-charts",
-				Namespace:    "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--recreate-pods",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "wait",
-			defaults: HelmSpec{
-				Wait: false,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Wait:      &enable,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--wait",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "devel",
-			defaults: HelmSpec{
-				Devel: true,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Wait:      &enable,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--devel",
-				"--wait",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "devel-release",
-			defaults: HelmSpec{
-				Devel: true,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Devel:     &disable,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "wait-from-default",
-			defaults: HelmSpec{
-				Wait: true,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Wait:      &disable,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--wait",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "timeout",
-			defaults: HelmSpec{
-				Timeout: 0,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Timeout:   some(123),
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--timeout", "123",
-				"--namespace", "test-namespace",
-			},
-		},
-		{
-			name: "timeout-from-default",
-			defaults: HelmSpec{
-				Timeout: 123,
-			},
-			release: &ReleaseSpec{
-				Chart:     "test/chart",
-				Version:   "0.1",
-				Timeout:   nil,
-				Name:      "test-charts",
-				Namespace: "test-namespace",
-			},
-			want: []string{
-				"--version", "0.1",
-				"--timeout", "123",
-				"--namespace", "test-namespace",
-			},
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			state := &HelmState{
-				basePath:          "./",
-				DeprecatedContext: "default",
-				Releases:          []ReleaseSpec{*tt.release},
-				HelmDefaults:      tt.defaults,
-			}
-			helm := helmexec.New(logger, "default")
-			args, err := state.flagsForUpgrade(helm, tt.release)
-			if err != nil {
-				t.Errorf("unexpected error flagsForUpgade: %v", err)
-			}
-			if !reflect.DeepEqual(args, tt.want) {
-				t.Errorf("flagsForUpgrade returned = %v, want %v", args, tt.want)
-			}
-		})
-	}
-}
-
-func Test_isLocalChart(t *testing.T) {
-	type args struct {
-		chart string
-	}
-	tests := []struct {
-		name string
-		args args
-		want bool
-	}{
-		{
-			name: "local chart",
-			args: args{
-				chart: "./",
-			},
-			want: true,
-		},
-		{
-			name: "repo chart",
-			args: args{
-				chart: "stable/genius",
-			},
-			want: false,
-		},
-		{
-			name: "empty",
-			args: args{
-				chart: "",
-			},
-			want: false,
-		},
-		{
-			name: "parent local path",
-			args: args{
-				chart: "../examples",
-			},
-			want: true,
-		},
-		{
-			name: "parent-parent local path",
-			args: args{
-				chart: "../../",
-			},
-			want: true,
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if got := isLocalChart(tt.args.chart); got != tt.want {
-				t.Errorf("pathExists() = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}
-
-func Test_normalizeChart(t *testing.T) {
-	type args struct {
-		basePath string
-		chart    string
-	}
-	tests := []struct {
-		name string
-		args args
-		want string
-	}{
-		{
-			name: "construct local chart path",
-			args: args{
-				basePath: "/Users/jane/code/deploy/charts",
-				chart:    "./app",
-			},
-			want: "/Users/jane/code/deploy/charts/app",
-		},
-		{
-			name: "repo path",
-			args: args{
-				basePath: "/Users/jane/code/deploy/charts",
-				chart:    "remote/app",
-			},
-			want: "remote/app",
-		},
-		{
-			name: "construct local chart path, parent dir",
-			args: args{
-				basePath: "/Users/jane/code/deploy/charts",
-				chart:    "../app",
-			},
-			want: "/Users/jane/code/deploy/app",
-		},
-		{
-			name: "too much parent levels",
-			args: args{
-				basePath: "/src",
-				chart:    "../../app",
-			},
-			want: "/app",
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if got := normalizeChart(tt.args.basePath, tt.args.chart); got != tt.want {
-				t.Errorf("normalizeChart() = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}
-
-// mocking helmexec.Interface
-
-type mockHelmExec struct {
-	charts   []string
-	repo     []string
-	releases []mockRelease
-}
-
-type mockRelease struct {
-	name  string
-	flags []string
-}
-
-func (helm *mockHelmExec) UpdateDeps(chart string) error {
-	if strings.Contains(chart, "error") {
-		return errors.New("error")
-	}
-	helm.charts = append(helm.charts, chart)
-	return nil
-}
-
-func (helm *mockHelmExec) SetExtraArgs(args ...string) {
-	return
-}
-func (helm *mockHelmExec) SetHelmBinary(bin string) {
-	return
-}
-func (helm *mockHelmExec) AddRepo(name, repository, certfile, keyfile, username, password string) error {
-	helm.repo = []string{name, repository, certfile, keyfile, username, password}
-	return nil
-}
-func (helm *mockHelmExec) UpdateRepo() error {
-	return nil
-}
-func (helm *mockHelmExec) SyncRelease(name, chart string, flags ...string) error {
-	if strings.Contains(name, "error") {
-		return errors.New("error")
-	}
-	helm.releases = append(helm.releases, mockRelease{name: name, flags: flags})
-	helm.charts = append(helm.charts, chart)
-	return nil
-}
-func (helm *mockHelmExec) DiffRelease(name, chart string, flags ...string) error {
-	return nil
-}
-func (helm *mockHelmExec) ReleaseStatus(release string) error {
-	if strings.Contains(release, "error") {
-		return errors.New("error")
-	}
-	helm.releases = append(helm.releases, mockRelease{name: release, flags: []string{}})
-	return nil
-}
-func (helm *mockHelmExec) DeleteRelease(name string, flags ...string) error {
-	return nil
-}
-func (helm *mockHelmExec) DecryptSecret(name string) (string, error) {
-	return "", nil
-}
-func (helm *mockHelmExec) TestRelease(name string, flags ...string) error {
-	if strings.Contains(name, "error") {
-		return errors.New("error")
-	}
-	helm.releases = append(helm.releases, mockRelease{name: name, flags: flags})
-	return nil
-}
-func (helm *mockHelmExec) Fetch(chart string, flags ...string) error {
-	return nil
-}
-func (helm *mockHelmExec) Lint(chart string, flags ...string) error {
-	return nil
-}
-func (helm *mockHelmExec) TemplateRelease(chart string, flags ...string) error {
-	return nil
-}
-func TestHelmState_SyncRepos(t *testing.T) {
-	tests := []struct {
-		name  string
-		repos []RepositorySpec
-		helm  *mockHelmExec
-		envs  map[string]string
-		want  []string
-	}{
-		{
-			name: "normal repository",
-			repos: []RepositorySpec{
-				{
-					Name:     "name",
-					URL:      "http://example.com/",
-					CertFile: "",
-					KeyFile:  "",
-					Username: "",
-					Password: "",
-				},
-			},
-			helm: &mockHelmExec{},
-			want: []string{"name", "http://example.com/", "", "", "", ""},
-		},
-		{
-			name: "repository with cert and key",
-			repos: []RepositorySpec{
-				{
-					Name:     "name",
-					URL:      "http://example.com/",
-					CertFile: "certfile",
-					KeyFile:  "keyfile",
-					Username: "",
-					Password: "",
-				},
-			},
-			helm: &mockHelmExec{},
-			want: []string{"name", "http://example.com/", "certfile", "keyfile", "", ""},
-		},
-		{
-			name: "repository with username and password",
-			repos: []RepositorySpec{
-				{
-					Name:     "name",
-					URL:      "http://example.com/",
-					CertFile: "",
-					KeyFile:  "",
-					Username: "example_user",
-					Password: "example_password",
-				},
-			},
-			helm: &mockHelmExec{},
-			want: []string{"name", "http://example.com/", "", "", "example_user", "example_password"},
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			for k, v := range tt.envs {
-				err := os.Setenv(k, v)
-				if err != nil {
-					t.Error("HelmState.SyncRepos() could not set env var for testing")
-				}
-			}
-			state := &HelmState{
-				Repositories: tt.repos,
-			}
-			if _ = state.SyncRepos(tt.helm); !reflect.DeepEqual(tt.helm.repo, tt.want) {
-				t.Errorf("HelmState.SyncRepos() for [%s] = %v, want %v", tt.name, tt.helm.repo, tt.want)
-			}
-		})
-	}
-}
-
-func TestHelmState_SyncReleases(t *testing.T) {
-	tests := []struct {
-		name         string
-		releases     []ReleaseSpec
-		helm         *mockHelmExec
-		wantReleases []mockRelease
-	}{
-		{
-			name: "normal release",
-			releases: []ReleaseSpec{
-				{
-					Name:  "releaseName",
-					Chart: "foo",
-				},
-			},
-			helm:         &mockHelmExec{},
-			wantReleases: []mockRelease{{"releaseName", []string{}}},
-		},
-		{
-			name: "escaped values",
-			releases: []ReleaseSpec{
-				{
-					Name:  "releaseName",
-					Chart: "foo",
-					SetValues: []SetValue{
-						{
-							Name:  "someList",
-							Value: "a,b,c",
-						},
-						{
-							Name:  "json",
-							Value: "{\"name\": \"john\"}",
-						},
-					},
-				},
-			},
-			helm:         &mockHelmExec{},
-			wantReleases: []mockRelease{{"releaseName", []string{"--set", "someList=a\\,b\\,c", "--set", "json=\\{\"name\": \"john\"\\}"}}},
-		},
-		{
-			name: "set single value from file",
-			releases: []ReleaseSpec{
-				{
-					Name:  "releaseName",
-					Chart: "foo",
-					SetValues: []SetValue{
-						{
-							Name:  "foo",
-							Value: "FOO",
-						},
-						{
-							Name: "bar",
-							File: "path/to/bar",
-						},
-						{
-							Name:  "baz",
-							Value: "BAZ",
-						},
-					},
-				},
-			},
-			helm:         &mockHelmExec{},
-			wantReleases: []mockRelease{{"releaseName", []string{"--set", "foo=FOO", "--set-file", "bar=path/to/bar", "--set", "baz=BAZ"}}},
-		},
-		{
-			name: "set single array value in an array",
-			releases: []ReleaseSpec{
-				{
-					Name:  "releaseName",
-					Chart: "foo",
-					SetValues: []SetValue{
-						{
-							Name: "foo.bar[0]",
-							Values: []string{
-								"A",
-								"B",
-							},
-						},
-					},
-				},
-			},
-			helm:         &mockHelmExec{},
-			wantReleases: []mockRelease{{"releaseName", []string{"--set", "foo.bar[0]={A,B}"}}},
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			state := &HelmState{
-				Releases: tt.releases,
-			}
-			if _ = state.SyncReleases(tt.helm, []string{}, 1); !reflect.DeepEqual(tt.helm.releases, tt.wantReleases) {
-				t.Errorf("HelmState.SyncReleases() for [%s] = %v, want %v", tt.name, tt.helm.releases, tt.wantReleases)
-			}
-		})
-	}
-}
-
-func TestHelmState_UpdateDeps(t *testing.T) {
-	state := &HelmState{
-		basePath: "/src",
-		Releases: []ReleaseSpec{
-			{
-				Chart: "./..",
-			},
-			{
-				Chart: "../examples",
-			},
-			{
-				Chart: "../../helmfile",
-			},
-			{
-				Chart: "published",
-			},
-			{
-				Chart: "published/deeper",
-			},
-			{
-				Chart: ".error",
-			},
-		},
-	}
-
-	want := []string{"/", "/examples", "/helmfile"}
-	helm := &mockHelmExec{}
-	errs := state.UpdateDeps(helm)
-	if !reflect.DeepEqual(helm.charts, want) {
-		t.Errorf("HelmState.UpdateDeps() = %v, want %v", helm.charts, want)
-	}
-	if len(errs) != 0 {
-		t.Errorf("HelmState.UpdateDeps() - no errors, but got: %v", len(errs))
-	}
-}
-
-func TestHelmState_ReleaseStatuses(t *testing.T) {
-	tests := []struct {
-		name     string
-		releases []ReleaseSpec
-		helm     *mockHelmExec
-		want     []mockRelease
-		wantErr  bool
-	}{
-		{
-			name: "happy path",
-			releases: []ReleaseSpec{
-				{
-					Name: "releaseA",
-				},
-			},
-			helm: &mockHelmExec{},
-			want: []mockRelease{{"releaseA", []string{}}},
-		},
-		{
-			name: "happy path",
-			releases: []ReleaseSpec{
-				{
-					Name: "error",
-				},
-			},
-			helm:    &mockHelmExec{},
-			wantErr: true,
-		},
-	}
-	for _, tt := range tests {
-		i := func(t *testing.T) {
-			state := &HelmState{
-				Releases: tt.releases,
-			}
-			errs := state.ReleaseStatuses(tt.helm, 1)
-			if (errs != nil) != tt.wantErr {
-				t.Errorf("ReleaseStatuses() for %s error = %v, wantErr %v", tt.name, errs, tt.wantErr)
-				return
-			}
-			if !reflect.DeepEqual(tt.helm.releases, tt.want) {
-				t.Errorf("HelmState.ReleaseStatuses() for [%s] = %v, want %v", tt.name, tt.helm.releases, tt.want)
-			}
-		}
-		t.Run(tt.name, i)
-	}
-}
-
-func TestHelmState_TestReleasesNoCleanUp(t *testing.T) {
-	tests := []struct {
-		name     string
-		cleanup  bool
-		releases []ReleaseSpec
-		helm     *mockHelmExec
-		want     []mockRelease
-		wantErr  bool
-	}{
-		{
-			name: "happy path",
-			releases: []ReleaseSpec{
-				{
-					Name: "releaseA",
-				},
-			},
-			helm: &mockHelmExec{},
-			want: []mockRelease{{"releaseA", []string{"--timeout", "1"}}},
-		},
-		{
-			name:    "do cleanup",
-			cleanup: true,
-			releases: []ReleaseSpec{
-				{
-					Name: "releaseB",
-				},
-			},
-			helm: &mockHelmExec{},
-			want: []mockRelease{{"releaseB", []string{"--cleanup", "--timeout", "1"}}},
-		},
-		{
-			name: "happy path",
-			releases: []ReleaseSpec{
-				{
-					Name: "error",
-				},
-			},
-			helm:    &mockHelmExec{},
-			wantErr: true,
-		},
-	}
-	for _, tt := range tests {
-		i := func(t *testing.T) {
-			state := &HelmState{
-				Releases: tt.releases,
-			}
-			errs := state.TestReleases(tt.helm, tt.cleanup, 1)
-			if (errs != nil) != tt.wantErr {
-				t.Errorf("TestReleases() for %s error = %v, wantErr %v", tt.name, errs, tt.wantErr)
-				return
-			}
-			if !reflect.DeepEqual(tt.helm.releases, tt.want) {
-				t.Errorf("HelmState.TestReleases() for [%s] = %v, want %v", tt.name, tt.helm.releases, tt.want)
-			}
-		}
-		t.Run(tt.name, i)
-	}
-}
-
-func TestHelmState_NoReleaseMatched(t *testing.T) {
-	releases := []ReleaseSpec{
-		{
-			Name: "releaseA",
-			Labels: map[string]string{
-				"foo": "bar",
-			},
-		},
-	}
-	tests := []struct {
-		name    string
-		labels  string
-		wantErr bool
-	}{
-		{
-			name: "happy path",
-
-			labels:  "foo=bar",
-			wantErr: false,
-		},
-		{
-			name:    "name does not exist",
-			labels:  "name=releaseB",
-			wantErr: false,
-		},
-		{
-			name:    "label does not match anything",
-			labels:  "foo=notbar",
-			wantErr: false,
-		},
-	}
-	for _, tt := range tests {
-		i := func(t *testing.T) {
-			state := &HelmState{
-				Releases: releases,
-				logger:   logger,
-			}
-			errs := state.FilterReleases([]string{tt.labels})
-			if (errs != nil) != tt.wantErr {
-				t.Errorf("ReleaseStatuses() for %s error = %v, wantErr %v", tt.name, errs, tt.wantErr)
-				return
-			}
-		}
-		t.Run(tt.name, i)
-	}
-}

test/integration/environment.values.yaml

@@ -0,0 +1 @@
+mysecret: MYSECRET

test/integration/happypath.yaml

@@ -1,8 +1,16 @@
+environments:
+  default:
+    values:
+      - environment.values.yaml
+---
 repositories:
   - name: stable
     url: https://kubernetes-charts.storage.googleapis.com/
+  - name: incubator
+    url: https://kubernetes-charts-incubator.storage.googleapis.com
 
-context: minikube
+helmDefaults:
+  kubeContext: minikube
 
 releases:
 
@@ -11,3 +19,9 @@ releases:
     set:
       - name: ingress.enabled
         value: false
+
+  - name: raw
+    chart: incubator/raw
+    values:
+      - mysecret: {{ .Environment.Values.mysecret }}
+      - values.yaml

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 +56,43 @@ 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: ${code}"
+
+info "Locking dependencies"
+${helmfile} -f ${dir}/happypath.yaml deps
+code=$?
+[ ${code} -eq 0 ] || fail "unexpected exit code returned by helmfile deps: ${code}"
+
+info "Applying ${dir}/happypath.yaml with locked dependencies"
+${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"
 
 

test/integration/values.yaml

@@ -0,0 +1,9 @@
+resources: []
+templates:
+  - |
+    apiVersion: v1
+    kind: Secret
+    metadata:
+      name: common-secret
+    stringData:
+      mykey: {{ .Values.mysecret }}

tmpl/file.go

@@ -1,66 +0,0 @@
-package tmpl
-
-import (
-	"bytes"
-	"io/ioutil"
-
-	"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
-	// Namespace is accessible as `.Namespace` from any non-values template executed by the renderer
-	Namespace string
-}
-
-type FileRenderer interface {
-	RenderTemplateFileToBuffer(file string) (*bytes.Buffer, error)
-}
-
-func NewFileRenderer(readFile func(filename string) ([]byte, error), basePath string, env environment.Environment, namespace string) *templateFileRenderer {
-	return &templateFileRenderer{
-		ReadFile: readFile,
-		Context: &Context{
-			basePath: basePath,
-			readFile: readFile,
-		},
-		Data: TemplateData{
-			Environment: env,
-			Namespace:   namespace,
-		},
-	}
-}
-
-func NewFirstPassRenderer(basePath string, env environment.Environment) *templateFileRenderer {
-	return &templateFileRenderer{
-		ReadFile: ioutil.ReadFile,
-		Context: &Context{
-			preRender: true,
-			basePath:  basePath,
-			readFile:  ioutil.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.RenderTemplateContentToBuffer(content)
-}
-
-func (r *templateFileRenderer) RenderTemplateContentToBuffer(content []byte) (*bytes.Buffer, error) {
-	return r.Context.RenderTemplateToBuffer(string(content), r.Data)
-}

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