Add --dependency-update for upgrade cmd

Signed-off-by: Oliver Bähler <oliverbaehler@hotmail.com>

cmd/helm/upgrade.go

@@ -30,6 +30,7 @@ import (
 	"helm.sh/helm/v3/pkg/chart/loader"
 	"helm.sh/helm/v3/pkg/cli/output"
 	"helm.sh/helm/v3/pkg/cli/values"
+	"helm.sh/helm/v3/pkg/downloader"
 	"helm.sh/helm/v3/pkg/getter"
 	"helm.sh/helm/v3/pkg/storage/driver"
 )
@@ -105,6 +106,7 @@ func newUpgradeCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 					instClient.Wait = client.Wait
 					instClient.WaitForJobs = client.WaitForJobs
 					instClient.Devel = client.Devel
+					instClient.DependencyUpdate = client.DependencyUpdate
 					instClient.Namespace = client.Namespace
 					instClient.Atomic = client.Atomic
 					instClient.PostRenderer = client.PostRenderer
@@ -132,6 +134,7 @@ func newUpgradeCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 				return err
 			}
 
+			p := getter.All(settings)
 			vals, err := valueOpts.MergeValues(getter.All(settings))
 			if err != nil {
 				return err
@@ -142,7 +145,37 @@ func newUpgradeCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 			if err != nil {
 				return err
 			}
+
+			// Only check dependencies if there are any
 			if req := ch.Metadata.Dependencies; req != nil {
+				// Update all dependencies if DependencyUpdate is true
+				if client.DependencyUpdate {
+					man := &downloader.Manager{
+						Out:              out,
+						ChartPath:        chartPath,
+						Keyring:          client.ChartPathOptions.Keyring,
+						SkipUpdate:       false,
+						Getters:          p,
+						RepositoryConfig: settings.RepositoryConfig,
+						RepositoryCache:  settings.RepositoryCache,
+						Debug:            settings.Debug,
+					}
+
+					// reload chart dependencies
+					if err := man.Update(); err != nil {
+						return err
+					}
+
+					// Reload the chart with the updated Chart.lock file.
+					if ch, err = loader.Load(chartPath); err != nil {
+						return errors.Wrap(err, "failed reloading chart after repo update")
+					}
+				}
+
+				// If CheckDependencies returns an error, we have unfulfilled dependencies.
+				// As of Helm 2.4.0, this is treated as a stopping condition:
+				// https://github.com/helm/helm/issues/2209
+				// Update all dependencies if DependencyUpdate is true
 				if err := action.CheckDependencies(ch, req); err != nil {
 					return err
 				}
@@ -182,6 +215,7 @@ func newUpgradeCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 	f.BoolVar(&client.Wait, "wait", false, "if set, will wait until all Pods, PVCs, Services, and minimum number of Pods of a Deployment, StatefulSet, or ReplicaSet are in a ready state before marking the release as successful. It will wait for as long as --timeout")
 	f.BoolVar(&client.WaitForJobs, "wait-for-jobs", false, "if set and --wait enabled, will wait until all Jobs have been completed before marking the release as successful. It will wait for as long as --timeout")
 	f.BoolVar(&client.Atomic, "atomic", false, "if set, upgrade process rolls back changes made in case of failed upgrade. The --wait flag will be set automatically if --atomic is used")
+	f.BoolVar(&client.DependencyUpdate, "dependency-update", false, "run helm dependency update before upgrading the chart")
 	f.IntVar(&client.MaxHistory, "history-max", settings.MaxHistory, "limit the maximum number of revisions saved per release. Use 0 for no limit")
 	f.BoolVar(&client.CleanupOnFail, "cleanup-on-fail", false, "allow deletion of new resources created in this upgrade when upgrade fails")
 	f.BoolVar(&client.SubNotes, "render-subchart-notes", false, "if set, render subchart notes along with the parent")

pkg/action/upgrade.go

@@ -98,6 +98,8 @@ type Upgrade struct {
 	PostRenderer postrender.PostRenderer
 	// DisableOpenAPIValidation controls whether OpenAPI validation is enforced.
 	DisableOpenAPIValidation bool
+	// Upgrade Chart dependencies before upgrade if true
+	DependencyUpdate bool
 }
 
 // NewUpgrade creates a new Upgrade object with the given configuration.