Add basic repository authentication (#154)

* basic repository authentication via new `username` and `password` keys

* add warning to readme

README.md

@@ -34,6 +34,8 @@ repositories:
     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)
 
@@ -76,8 +78,8 @@ releases:
 
 Helmfile uses [Go templates](https://godoc.org/text/template) for templating your helmfile.yaml. While go ships several built-in functions, we have added all of the functions in the [Sprig library](https://godoc.org/github.com/Masterminds/sprig).
 
-We also added one special template function: `requiredEnv`.  
+We also added one special template function: `requiredEnv`.
-The `required_env` function allows you to declare a particular environment variable as required for template rendering.  
+The `required_env` function allows you to declare a particular environment variable as required for template rendering.
 If the environment variable is unset or empty, the template rendering will fail with an error message.
 
 ## Using environment variables
@@ -178,6 +180,8 @@ The `helmfile sync` sub-command sync your cluster state as described in your `he
 Under the covers, Helmfile executes `helm upgrade --install` for each `release` declared in the manifest, by optionally decrypting [secrets](#secrets) to be consumed as helm chart values. It also updates specified chart repositories and updates the
 dependencies of any referenced local charts.
 
+For Helm 2.9+ you can use a username and password to authenticate to a remote repository. WARNING - repository password will be exposed unmasked in console using literal value or environment variable.
+
 ### diff
 
 The `helmfile diff` sub-command executes the [helm-diff](https://github.com/databus23/helm-diff) plugin across all of

helmexec/exec.go

@@ -30,12 +30,15 @@ func (helm *execer) SetExtraArgs(args ...string) {
 	helm.extra = args
 }
 
-func (helm *execer) AddRepo(name, repository, certfile, keyfile string) error {
+func (helm *execer) AddRepo(name, repository, certfile, keyfile, username, password string) error {
 	var args []string
 	args = append(args, "repo", "add", name, repository)
 	if certfile != "" && keyfile != "" {
 		args = append(args, "--cert-file", certfile, "--key-file", keyfile)
 	}
+	if username != "" && password != "" {
+		args = append(args, "--username", username, "--password", password)
+	}
 	out, err := helm.exec(args...)
 	helm.write(out)
 	return err

helmexec/exec_test.go

@@ -59,18 +59,25 @@ func Test_SetExtraArgs(t *testing.T) {
 func Test_AddRepo(t *testing.T) {
 	var buffer bytes.Buffer
 	helm := MockExecer(&buffer, "dev")
-	helm.AddRepo("myRepo", "https://repo.example.com/", "cert.pem", "key.pem")
+	helm.AddRepo("myRepo", "https://repo.example.com/", "cert.pem", "key.pem", "", "")
 	expected := "exec: helm repo add myRepo https://repo.example.com/ --cert-file cert.pem --key-file key.pem --kube-context dev\n"
 	if buffer.String() != expected {
 		t.Errorf("helmexec.AddRepo()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}
 
 	buffer.Reset()
-	helm.AddRepo("myRepo", "https://repo.example.com/", "", "")
+	helm.AddRepo("myRepo", "https://repo.example.com/", "", "", "", "")
 	expected = "exec: helm repo add myRepo https://repo.example.com/ --kube-context dev\n"
 	if buffer.String() != expected {
 		t.Errorf("helmexec.AddRepo()\nactual = %v\nexpect = %v", buffer.String(), expected)
 	}
+
+	buffer.Reset()
+	helm.AddRepo("myRepo", "https://repo.example.com/", "", "", "example_user", "example_password")
+	expected = "exec: helm repo add myRepo https://repo.example.com/ --username example_user --password example_password --kube-context dev\n"
+	if buffer.String() != expected {
+		t.Errorf("helmexec.AddRepo()\nactual = %v\nexpect = %v", buffer.String(), expected)
+	}
 }
 
 func Test_UpdateRepo(t *testing.T) {

helmexec/helmexec.go

@@ -4,7 +4,7 @@ package helmexec
 type Interface interface {
 	SetExtraArgs(args ...string)
 
-	AddRepo(name, repository, certfile, keyfile string) error
+	AddRepo(name, repository, certfile, keyfile, username, password string) error
 	UpdateRepo() error
 	UpdateDeps(chart string) error
 	SyncRelease(name, chart string, flags ...string) error

state/state.go

@@ -37,6 +37,8 @@ type RepositorySpec struct {
 	URL      string `yaml:"url"`
 	CertFile string `yaml:"certFile"`
 	KeyFile  string `yaml:"keyFile"`
+	Username string `yaml:"username"`
+	Password string `yaml:"password"`
 }
 
 // ReleaseSpec defines the structure of a helm release
@@ -152,7 +154,7 @@ func (state *HelmState) SyncRepos(helm helmexec.Interface) []error {
 	errs := []error{}
 
 	for _, repo := range state.Repositories {
-		if err := helm.AddRepo(repo.Name, repo.URL, repo.CertFile, repo.KeyFile); err != nil {
+		if err := helm.AddRepo(repo.Name, repo.URL, repo.CertFile, repo.KeyFile, repo.Username, repo.Password); err != nil {
 			errs = append(errs, err)
 		}
 	}

state/state_test.go

@@ -521,8 +521,8 @@ func (helm *mockHelmExec) UpdateDeps(chart string) error {
 func (helm *mockHelmExec) SetExtraArgs(args ...string) {
 	return
 }
-func (helm *mockHelmExec) AddRepo(name, repository, certfile, keyfile string) error {
+func (helm *mockHelmExec) AddRepo(name, repository, certfile, keyfile, username, password string) error {
-	helm.repo = []string{name, repository, certfile, keyfile}
+	helm.repo = []string{name, repository, certfile, keyfile, username, password}
 	return nil
 }
 func (helm *mockHelmExec) UpdateRepo() error {
@@ -576,10 +576,12 @@ func TestHelmState_SyncRepos(t *testing.T) {
 					URL:      "http://example.com/",
 					CertFile: "",
 					KeyFile:  "",
+					Username: "",
+					Password: "",
 				},
 			},
 			helm: &mockHelmExec{},
-			want: []string{"name", "http://example.com/", "", ""},
+			want: []string{"name", "http://example.com/", "", "", "", ""},
 		},
 		{
 			name: "repository with cert and key",
@@ -589,10 +591,27 @@ func TestHelmState_SyncRepos(t *testing.T) {
 					URL:      "http://example.com/",
 					CertFile: "certfile",
 					KeyFile:  "keyfile",
+					Username: "",
+					Password: "",
 				},
 			},
 			helm: &mockHelmExec{},
-			want: []string{"name", "http://example.com/", "certfile", "keyfile"},
+			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 {