feat(dependency): Add --skip-download-if-exists into dependency build/update

Signed-off-by: Suleiman Dibirov <idsulik@gmail.com>

pkg/action/dependency.go

@@ -37,6 +37,7 @@ type Dependency struct {
 	Verify                bool
 	Keyring               string
 	SkipRefresh           bool
+	SkipDownloadIfExists  bool
 	ColumnWidth           uint
 	Username              string
 	Password              string

pkg/cmd/dependency.go

@@ -133,4 +133,5 @@ func addDependencySubcommandFlags(f *pflag.FlagSet, client *action.Dependency) {
 	f.BoolVar(&client.InsecureSkipTLSverify, "insecure-skip-tls-verify", false, "skip tls certificate checks for the chart download")
 	f.BoolVar(&client.PlainHTTP, "plain-http", false, "use insecure HTTP connections for the chart download")
 	f.StringVar(&client.CaFile, "ca-file", "", "verify certificates of HTTPS-enabled servers using this CA bundle")
+	f.BoolVar(&client.SkipDownloadIfExists, "skip-download-if-exists", false, "skip download of the chart if it already exists in the charts directory")
 }

pkg/cmd/dependency_build.go

@@ -65,6 +65,7 @@ func newDependencyBuildCmd(out io.Writer) *cobra.Command {
 				ChartPath:        chartpath,
 				Keyring:          client.Keyring,
 				SkipUpdate:       client.SkipRefresh,
+				SkipDownloadIfExists: client.SkipDownloadIfExists,
 				Getters:          getter.All(settings),
 				RegistryClient:   registryClient,
 				RepositoryConfig: settings.RepositoryConfig,

pkg/cmd/dependency_update.go

@@ -69,6 +69,7 @@ func newDependencyUpdateCmd(_ *action.Configuration, out io.Writer) *cobra.Comma
 				ChartPath:        chartpath,
 				Keyring:          client.Keyring,
 				SkipUpdate:       client.SkipRefresh,
+				SkipDownloadIfExists: client.SkipDownloadIfExists,
 				Getters:          getter.All(settings),
 				RegistryClient:   registryClient,
 				RepositoryConfig: settings.RepositoryConfig,

pkg/downloader/manager.go

@@ -70,6 +70,8 @@ type Manager struct {
 	Keyring string
 	// SkipUpdate indicates that the repository should not be updated first.
 	SkipUpdate bool
+	// SkipDownloadIfExists indicates that the chart should not be downloaded if it already exists.
+	SkipDownloadIfExists bool
 	// Getter collection for the operation
 	Getters          []getter.Provider
 	RegistryClient   *registry.Client
@@ -326,6 +328,14 @@ func (m *Manager) downloadAll(deps []*chart.Dependency) error {
 			continue
 		}
 
+		if m.SkipDownloadIfExists {
+			name := filepath.Base(churl)
+			if _, err = os.Stat(filepath.Join(destPath, name)); err == nil {
+				fmt.Fprintf(m.Out, "Already exists locally %s from repo %s\n", dep.Name, dep.Repository)
+				continue
+			}
+		}
+
 		fmt.Fprintf(m.Out, "Downloading %s from repo %s\n", dep.Name, dep.Repository)
 
 		dl := ChartDownloader{