feat: Add --only--release option to uninstall

cmd/helm/uninstall.go

@@ -68,6 +68,7 @@ func newUninstallCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 	}
 
 	f := cmd.Flags()
+	f.BoolVar(&client.OnlyRelease, "only-release", false, "keep all k8s resources when uninstall")
 	f.BoolVar(&client.DryRun, "dry-run", false, "simulate a uninstall")
 	f.BoolVar(&client.DisableHooks, "no-hooks", false, "prevent hooks from running during uninstallation")
 	f.BoolVar(&client.KeepHistory, "keep-history", false, "remove all associated resources and mark the release as deleted, but retain the release history")

pkg/action/resource_policy.go

@@ -23,8 +23,14 @@ import (
 	"helm.sh/helm/v3/pkg/releaseutil"
 )
 
-func filterManifestsToKeep(manifests []releaseutil.Manifest) (keep, remaining []releaseutil.Manifest) {
+func filterManifestsToKeep(manifests []releaseutil.Manifest, onlyRelease bool) (keep, remaining []releaseutil.Manifest) {
 	for _, m := range manifests {
+		if onlyRelease {
+			if m.Head.Metadata != nil {
+				keep = append(keep, m)
+			}
+			continue
+		}
 		if m.Head.Metadata == nil || m.Head.Metadata.Annotations == nil || len(m.Head.Metadata.Annotations) == 0 {
 			remaining = append(remaining, m)
 			continue

pkg/action/uninstall.go

@@ -36,6 +36,7 @@ type Uninstall struct {
 	cfg *Configuration
 
 	DisableHooks bool
+	OnlyRelease  bool
 	DryRun       bool
 	KeepHistory  bool
 	Wait         bool
@@ -200,7 +201,7 @@ func (u *Uninstall) deleteRelease(rel *release.Release) (kube.ResourceList, stri
 		return nil, rel.Manifest, []error{errors.Wrap(err, "corrupted release record. You must manually delete the resources")}
 	}
 
-	filesToKeep, filesToDelete := filterManifestsToKeep(files)
+	filesToKeep, filesToDelete := filterManifestsToKeep(files, u.OnlyRelease)
 	var kept string
 	for _, f := range filesToKeep {
 		kept += "[" + f.Head.Kind + "] " + f.Head.Metadata.Name + "\n"