allow dependency versions to be overwritten on package update

Signed-off-by: Gregory Hill <greg.hill@monax.io>

cmd/helm/package.go

@@ -88,6 +88,7 @@ func newPackageCmd(out io.Writer) *cobra.Command {
 						Keyring:            client.Keyring,
 						Getters:            p,
 						Debug:              settings.Debug,
+						DependencyVersions: client.DependencyVersions,
 						RepositoryConfig:   settings.RepositoryConfig,
 						RepositoryCache:    settings.RepositoryCache,
 					}
@@ -114,6 +115,7 @@ func newPackageCmd(out io.Writer) *cobra.Command {
 	f.StringVar(&client.AppVersion, "app-version", "", "set the appVersion on the chart to this version")
 	f.StringVarP(&client.Destination, "destination", "d", ".", "location to write the chart.")
 	f.BoolVarP(&client.DependencyUpdate, "dependency-update", "u", false, `update dependencies from "Chart.yaml" to dir "charts/" before packaging`)
+	f.StringToStringVar(&client.DependencyVersions, "set-dependency-version", make(map[string]string), "set dependency versions. Used if --dependency-update is true")
 	addValueOptionsFlags(f, valueOpts)
 
 	return cmd

pkg/action/package.go

@@ -43,6 +43,7 @@ type Package struct {
 	AppVersion         string
 	Destination        string
 	DependencyUpdate   bool
+	DependencyVersions map[string]string
 
 	RepositoryConfig string
 	RepositoryCache  string
@@ -77,6 +78,15 @@ func (p *Package) Run(path string, vals map[string]interface{}) (string, error)
 		ch.Metadata.AppVersion = p.AppVersion
 	}
 
+	if p.DependencyUpdate {
+		// only alter these upon successful update
+		for _, d := range ch.Metadata.Dependencies {
+			if v, ok := p.DependencyVersions[d.Name]; ok {
+				d.Version = v
+			}
+		}
+	}
+
 	if reqs := ch.Metadata.Dependencies; reqs != nil {
 		if err := CheckDependencies(ch, reqs); err != nil {
 			return "", err

pkg/downloader/manager.go

@@ -57,6 +57,8 @@ type Manager struct {
 	SkipUpdate bool
 	// Getter collection for the operation
 	Getters []getter.Provider
+	// DependencyVersions allows us to explicitly set versions
+	DependencyVersions map[string]string
 	RepositoryConfig   string
 	RepositoryCache    string
 }
@@ -123,6 +125,13 @@ func (m *Manager) Update() error {
 		return nil
 	}
 
+	// Allow dependency versions to be overwritten.
+	for _, d := range c.Metadata.Dependencies {
+		if v, ok := m.DependencyVersions[d.Name]; ok {
+			d.Version = v
+		}
+	}
+
 	// Check that all of the repos we're dependent on actually exist and
 	// the repo index names.
 	repoNames, err := m.resolveRepoNames(req)