feat(helm): allow overriding values

This supports the `-f` flag for overriding values with a specified
TOML file.

_proto/hapi/chart/chart.proto

@@ -23,4 +23,9 @@ message Chart {
 	// Default config for this template.
 	hapi.chart.Config values = 4;
 
+	// License is the text of the LICENSE file, if included.
+	string license = 5;
+
+	// Readme is the text of the README.md file, if included.
+	string readme = 6;
 }

cmd/helm/install.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"io/ioutil"
 
 	"github.com/spf13/cobra"
 
@@ -24,6 +25,8 @@ var (
 	installArg string
 	// installDryRun performs a dry-run install
 	installDryRun bool
+	// installValues is the filename of supplied values.
+	installValues string
 )
 
 var installCmd = &cobra.Command{
@@ -33,13 +36,27 @@ var installCmd = &cobra.Command{
 	RunE:  runInstall,
 }
 
+func init() {
+	f := installCmd.Flags()
+	f.StringVar(&tillerHost, "host", "", "address of tiller server (default \":44134\")")
+	f.StringVarP(&installValues, "values", "f", "", "path to a values TOML file")
+	f.BoolVar(&installDryRun, "dry-run", false, "simulate an install")
+
+	RootCommand.AddCommand(installCmd)
+}
+
 func runInstall(cmd *cobra.Command, args []string) error {
 	if err := checkArgsLength(1, len(args), "chart name"); err != nil {
 		return err
 	}
 	installArg = args[0]
 
-	res, err := helm.InstallRelease(installArg, installDryRun)
+	rawVals, err := vals()
+	if err != nil {
+		return err
+	}
+
+	res, err := helm.InstallRelease(rawVals, installArg, installDryRun)
 	if err != nil {
 		return prettyError(err)
 	}
@@ -49,6 +66,13 @@ func runInstall(cmd *cobra.Command, args []string) error {
 	return nil
 }
 
+func vals() ([]byte, error) {
+	if installValues == "" {
+		return []byte{}, nil
+	}
+	return ioutil.ReadFile(installValues)
+}
+
 func printRelease(rel *release.Release) {
 	if rel == nil {
 		return
@@ -62,9 +86,3 @@ func printRelease(rel *release.Release) {
 		fmt.Println(rel.Name)
 	}
 }
-
-func init() {
-	installCmd.Flags().BoolVar(&installDryRun, "dry-run", false, "simulate an install")
-
-	RootCommand.AddCommand(installCmd)
-}

pkg/helm/convert.go

@@ -101,6 +101,13 @@ func TemplatesToProto(ch *chartutil.Chart) (tpls []*chartpbs.Template, err error
 	return
 }
 
+// OverridesToProto converts arbitary TOML override data to Config data.
+func OverridesToProto(values []byte) *chartpbs.Config {
+	return &chartpbs.Config{
+		Raw: string(values),
+	}
+}
+
 // ValuesToProto converts a chart's values.toml data to protobuf.
 func ValuesToProto(ch *chartutil.Chart) (*chartpbs.Config, error) {
 	if ch == nil {

pkg/helm/convert_test.go

+package helm
+
+import (
+	"testing"
+
+	chartutil "github.com/kubernetes/helm/pkg/chart"
+	"gopkg.in/yaml.v2"
+)
+
+func TestInstallReleaseOverrides(t *testing.T) {
+	vals := `name = "mariner"`
+	ch := "./testdata/albatross"
+	ir, err := InstallRelease([]byte(vals), ch, true)
+	if err != nil {
+		t.Fatalf("Failed to release: %s", err)
+	}
+
+	if len(ir.Release.Manifest) == 0 {
+		t.Fatalf("Expected a manifest.")
+	}
+
+	// Parse the result and see if the override worked
+	d := map[string]interface{}{}
+	if err := yaml.Unmarshal([]byte(ir.Release.Manifest), d); err != nil {
+		t.Fatalf("Failed to unmarshal manifest: %s", err)
+	}
+
+	if d["name"] != "mariner" {
+		t.Errorf("Unexpected name %q", d["name"])
+	}
+
+	if d["home"] != "nest" {
+		t.Errorf("Unexpected home %q", d["home"])
+	}
+}
+
+func TestOverridesToProto(t *testing.T) {
+	override := []byte(`test = "foo"`)
+	c := OverridesToProto(override)
+	if c.Raw != string(override) {
+		t.Errorf("Expected %q to match %q", c.Raw, override)
+	}
+}
+
+func TestChartToProto(t *testing.T) {
+	c, err := chartutil.LoadDir("./testdata/albatross")
+	if err != nil {
+		t.Fatalf("failed to load testdata chart: %s", err)
+	}
+
+	p, err := ChartToProto(c)
+	if err != nil {
+		t.Fatalf("failed to conver chart to proto: %s", err)
+	}
+
+	if p.Metadata.Name != c.Chartfile().Name {
+		t.Errorf("Expected names to match.")
+	}
+}

pkg/helm/helm.go

@@ -74,7 +74,7 @@ func UninstallRelease(name string) (*services.UninstallReleaseResponse, error) {
 }
 
 // InstallRelease installs a new chart and returns the release response.
-func InstallRelease(chStr string, dryRun bool) (*services.InstallReleaseResponse, error) {
+func InstallRelease(rawVals []byte, chStr string, dryRun bool) (*services.InstallReleaseResponse, error) {
 	chfi, err := chartutil.LoadChart(chStr)
 	if err != nil {
 		return nil, err
@@ -85,10 +85,7 @@ func InstallRelease(chStr string, dryRun bool) (*services.InstallReleaseResponse
 		return nil, err
 	}
 
-	vals, err := ValuesToProto(chfi)
-	if err != nil {
-		return nil, err
-	}
+	vals := OverridesToProto(rawVals)
 
 	return Config.client().install(&services.InstallReleaseRequest{
 		Chart:  chpb,

pkg/helm/testdata/albatross-overrides.toml

+name = "foo"

pkg/helm/testdata/albatross/Chart.yaml

+name: albatross
+description: testing chart
+version: 0.1.0
+home: "https://github.com/kubernetes/helm"

pkg/helm/testdata/albatross/templates/albatross.yaml

+# Test data. Not a valid Kubernetes manifest
+name: {{.name}}
+home: {{.home}}

pkg/helm/testdata/albatross/values.toml

+name = "albatross"
+home = "nest"