Support version issue #50

.gitignore

@@ -1,3 +1,5 @@
 /bin
 /helm
 *-packr.go
+
+.vscode/launch.json

README.md

@@ -12,7 +12,16 @@ appropriate helm command based on which action it is included within: `install`,
 porter mixin install helm
 ```
 
-### Configure mixin repositories
+### Mixin Configuration
+
+Helm client
+
+```yaml
+- helm:
+    clientVersion: v2.15.2
+```
+
+Repositories
 
 ```yaml
 - helm:

examples/mysql/porter.yaml

@@ -1,5 +1,9 @@
 mixins:
-- helm
+- helm:
+    clientVersion: v2.15.2
+    repositories:
+      stable:
+        url: "https://kubernetes-charts.storage.googleapis.com"
 
 name: helm-mysql
 version: 0.1.0
@@ -87,4 +91,3 @@ outputs:
       - install
       - upgrade
     sensitive: true
-

pkg/helm/build.go

@@ -9,7 +9,6 @@ import (
 )
 
 // These values may be referenced elsewhere (init.go), hence consts
-const helmClientVersion string = "v2.15.2"
 const helmArchiveTmpl string = "helm-%s-linux-amd64.tar.gz"
 const helmDownloadURLTmpl string = "https://get.helm.sh/%s"
 
@@ -22,9 +21,6 @@ const getHelm string = `RUN apt-get update && \
 RUN helm init --client-only
 `
 
-var helmArchiveVersion = fmt.Sprintf(helmArchiveTmpl, helmClientVersion)
-var helmDownloadURL = fmt.Sprintf(helmDownloadURLTmpl, helmArchiveVersion)
-
 // kubectl may be necessary; for example, to set up RBAC for Helm's Tiller component if needed
 const kubeVersion string = "v1.15.3"
 const getKubectl string = `RUN apt-get update && \
@@ -50,7 +46,8 @@ type BuildInput struct {
 //		  username: "username"
 //		  password: "password"
 type MixinConfig struct {
-	Repositories map[string]Repository
+	ClientVersion string `yaml:"clientVersion,omitempty"`
+	Repositories  map[string]Repository
 }
 
 type Repository struct {
@@ -73,6 +70,12 @@ func (m *Mixin) Build() error {
 	if err != nil {
 		return err
 	}
+	if input.Config.ClientVersion != "" {
+		m.HelmClientVersion = input.Config.ClientVersion
+	}
+
+	var helmArchiveVersion = fmt.Sprintf(helmArchiveTmpl, m.HelmClientVersion)
+	var helmDownloadURL = fmt.Sprintf(helmDownloadURLTmpl, helmArchiveVersion)
 
 	// Define helm
 	fmt.Fprintf(m.Out, getHelm, helmDownloadURL)

pkg/helm/build_test.go

@@ -2,6 +2,7 @@ package helm
 
 import (
 	"bytes"
+	"fmt"
 	"io/ioutil"
 	"testing"
 
@@ -17,7 +18,7 @@ func TestMixin_Build(t *testing.T) {
 
 	buildOutput := `RUN apt-get update && \
  apt-get install -y curl && \
- curl -o helm.tgz https://get.helm.sh/helm-v2.15.2-linux-amd64.tar.gz && \
+ curl -o helm.tgz https://get.helm.sh/helm-%s-linux-amd64.tar.gz && \
  tar -xzf helm.tgz && \
  mv linux-amd64/helm /usr/local/bin && \
  rm helm.tgz
@@ -38,9 +39,7 @@ RUN apt-get update && \
 
 		err = m.Build()
 		require.NoError(t, err, "build failed")
-
-		wantOutput := buildOutput + "\nRUN helm repo add stable kubernetes-charts --username username --password password"
-
+		wantOutput := fmt.Sprintf(buildOutput, m.HelmClientVersion) + "\nRUN helm repo add stable kubernetes-charts --username username --password password"
 		gotOutput := m.TestContext.GetOutput()
 		assert.Equal(t, wantOutput, gotOutput)
 	})
@@ -55,7 +54,23 @@ RUN apt-get update && \
 
 		err = m.Build()
 		require.NoError(t, err, "build failed")
+		wantOutput := fmt.Sprintf(buildOutput, m.HelmClientVersion)
 		gotOutput := m.TestContext.GetOutput()
-		assert.Equal(t, buildOutput, gotOutput)
+		assert.Equal(t, wantOutput, gotOutput)
+	})
+
+	t.Run("build with a defined helm client version", func(t *testing.T) {
+
+		b, err := ioutil.ReadFile("testdata/build-input-with-version.yaml")
+		require.NoError(t, err)
+
+		m := NewTestMixin(t)
+		m.Debug = false
+		m.In = bytes.NewReader(b)
+		err = m.Build()
+		require.NoError(t, err, "build failed")
+		wantOutput := fmt.Sprintf(buildOutput, m.HelmClientVersion)
+		gotOutput := m.TestContext.GetOutput()
+		assert.Equal(t, wantOutput, gotOutput)
 	})
 }

pkg/helm/helm.go

@@ -16,21 +16,25 @@ import (
 	k8s "k8s.io/client-go/kubernetes"
 )
 
+const defaultHelmClientVersion string = "v2.15.2"
+
 // Helm is the logic behind the helm mixin
 type Mixin struct {
 	*context.Context
 	schema        *packr.Box
 	ClientFactory kubernetes.ClientFactory
 	TillerIniter
+	HelmClientVersion string
 }
 
 // New helm mixin client, initialized with useful defaults.
 func New() *Mixin {
 	return &Mixin{
-		schema:        packr.New("schema", "./schema"),
-		Context:       context.New(),
-		ClientFactory: kubernetes.New(),
-		TillerIniter:  RealTillerIniter{},
+		schema:            packr.New("schema", "./schema"),
+		Context:           context.New(),
+		ClientFactory:     kubernetes.New(),
+		TillerIniter:      RealTillerIniter{},
+		HelmClientVersion: defaultHelmClientVersion,
 	}
 }
 

pkg/helm/helpers.go

@@ -9,6 +9,8 @@ import (
 	testclient "k8s.io/client-go/kubernetes/fake"
 )
 
+const MockHelmClientVersion string = "v2.15.2"
+
 type TestMixin struct {
 	*Mixin
 	TestContext *context.TestContext
@@ -47,7 +49,7 @@ func (t MockTillerIniter) installHelmClient(m *Mixin, version string) error {
 func NewMockTillerIniter() MockTillerIniter {
 	return MockTillerIniter{
 		GetTillerVersion: func(m *Mixin) (string, error) {
-			return helmClientVersion, nil
+			return MockHelmClientVersion, nil
 		},
 		SetupTillerRBAC: func(m *Mixin) error {
 			return nil
@@ -68,6 +70,7 @@ func NewTestMixin(t *testing.T) *TestMixin {
 	m.Context = c.Context
 	m.ClientFactory = &testKubernetesFactory{}
 	m.TillerIniter = NewMockTillerIniter()
+	m.HelmClientVersion = MockHelmClientVersion
 	return &TestMixin{
 		Mixin:       m,
 		TestContext: c,

pkg/helm/init.go

@@ -64,9 +64,9 @@ func (m *Mixin) Init() error {
 			return errors.Wrap(err, "unable to communicate with Tiller")
 		}
 	} else {
-		if helmClientVersion != tillerVersion {
+		if m.HelmClientVersion != tillerVersion {
 			fmt.Fprintf(m.Out, "Tiller version (%s) does not match client version (%s); downloading a compatible client.\n",
-				tillerVersion, helmClientVersion)
+				tillerVersion, m.HelmClientVersion)
 
 			err := ti.installHelmClient(m, tillerVersion)
 			if err != nil {

pkg/helm/init_test.go

@@ -1,6 +1,7 @@
 package helm
 
 import (
+	"fmt"
 	"os"
 	"testing"
 
@@ -62,7 +63,7 @@ func TestMixin_Init_MismatchedVersion(t *testing.T) {
 	require.NoError(t, err)
 
 	gotOutput := h.TestContext.GetOutput()
-	wantOutput := "Tiller version (mismatchedVersion) does not match client version (v2.15.2); downloading a compatible client.\n"
+	wantOutput := fmt.Sprintf("Tiller version (mismatchedVersion) does not match client version (%s); downloading a compatible client.\n", h.HelmClientVersion)
 	require.Equal(t, wantOutput, gotOutput)
 }
 
@@ -82,6 +83,6 @@ func TestMixin_Init_FailedClientInstall(t *testing.T) {
 	require.EqualError(t, err, "unable to install a compatible helm client: failed to install helm client")
 
 	gotOutput := h.TestContext.GetOutput()
-	wantOutput := "Tiller version (mismatchedVersion) does not match client version (v2.15.2); downloading a compatible client.\n"
+	wantOutput := fmt.Sprintf("Tiller version (mismatchedVersion) does not match client version (%s); downloading a compatible client.\n", h.HelmClientVersion)
 	require.Equal(t, wantOutput, gotOutput)
 }

pkg/helm/testdata/build-input-with-version.yaml

@@ -0,0 +1,8 @@
+config:
+  version: v2.16.1
+install:
+  - helm:
+      description: "Install MySQL"
+      name: porter-ci-mysql
+      chart: stable/mysql
+      version: 0.10.2