From 0cf7b19b216ccc17314dccb9a0d1322f4bfe1983 Mon Sep 17 00:00:00 2001
From: Suleiman Dibirov <idsulik@gmail.com>
Date: Sat, 10 Aug 2024 08:20:24 +0300
Subject: [PATCH] feat(dependency): Add --skip-download-if-exists into
 dependency build/update

Signed-off-by: Suleiman Dibirov <idsulik@gmail.com>
---
 pkg/action/dependency.go     |  1 +
 pkg/cmd/dependency.go        |  1 +
 pkg/cmd/dependency_build.go  |  1 +
 pkg/cmd/dependency_update.go |  1 +
 pkg/downloader/manager.go    | 10 ++++++++++
 5 files changed, 14 insertions(+)

diff --git a/pkg/action/dependency.go b/pkg/action/dependency.go
index 03c370c8e..82b69b676 100644
--- a/pkg/action/dependency.go
+++ b/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
diff --git a/pkg/cmd/dependency.go b/pkg/cmd/dependency.go
index 34bbff6be..587b16dc7 100644
--- a/pkg/cmd/dependency.go
+++ b/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")
 }
diff --git a/pkg/cmd/dependency_build.go b/pkg/cmd/dependency_build.go
index 320fe12ae..08075845e 100644
--- a/pkg/cmd/dependency_build.go
+++ b/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,
diff --git a/pkg/cmd/dependency_update.go b/pkg/cmd/dependency_update.go
index b534fb48a..714893ea1 100644
--- a/pkg/cmd/dependency_update.go
+++ b/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,
diff --git a/pkg/downloader/manager.go b/pkg/downloader/manager.go
index d41b8fdb4..3bb776473 100644
--- a/pkg/downloader/manager.go
+++ b/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{