feat(uninstall): add flag allow-not-found

It would accept release: not found as successful uninstallation, as technically it was successfully
uninstalled.

Fixes #9687

Signed-off-by: cndoit18 <cndoit18@outlook.com>

cmd/helm/uninstall.go

@@ -74,6 +74,6 @@ func newUninstallCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 	f.BoolVar(&client.Wait, "wait", false, "if set, will wait until all the resources are deleted before returning. It will wait for as long as --timeout")
 	f.DurationVar(&client.Timeout, "timeout", 300*time.Second, "time to wait for any individual Kubernetes operation (like Jobs for hooks)")
 	f.StringVar(&client.Description, "description", "", "add a custom description")
-
+	f.BoolVar(&client.AllowNotFound, "allow-not-found", false, "if a release by this name doesn't already exist, it will not return an error")
 	return cmd
 }

pkg/action/uninstall.go

@@ -26,6 +26,7 @@ import (
 	"helm.sh/helm/v3/pkg/kube"
 	"helm.sh/helm/v3/pkg/release"
 	"helm.sh/helm/v3/pkg/releaseutil"
+	"helm.sh/helm/v3/pkg/storage/driver"
 	helmtime "helm.sh/helm/v3/pkg/time"
 )
 
@@ -41,6 +42,7 @@ type Uninstall struct {
 	Wait          bool
 	Timeout       time.Duration
 	Description   string
+	AllowNotFound bool
 }
 
 // NewUninstall creates a new Uninstall object with the given configuration.
@@ -70,6 +72,9 @@ func (u *Uninstall) Run(name string) (*release.UninstallReleaseResponse, error)
 	}
 
 	rels, err := u.cfg.Releases.History(name)
+	if u.AllowNotFound && errors.Is(err, driver.ErrReleaseNotFound) {
+		return &release.UninstallReleaseResponse{}, nil
+	}
 	if err != nil {
 		return nil, errors.Wrapf(err, "uninstall: Release not loaded: %s", name)
 	}

pkg/action/uninstall_test.go

@@ -95,3 +95,16 @@ func TestUninstallRelease_Wait(t *testing.T) {
 	is.Contains(err.Error(), "U timed out")
 	is.Equal(res.Release.Info.Status, release.StatusUninstalled)
 }
+
+func TestUninstallRelease_allowNotFound(t *testing.T) {
+	is := assert.New(t)
+
+	unAction := uninstallAction(t)
+	unAction.DisableHooks = true
+	unAction.DryRun = false
+	unAction.KeepHistory = true
+	unAction.AllowNotFound = true
+	res, err := unAction.Run("chart-release-that-does-not-exist")
+	is.NoError(err)
+	is.Nil(res.Release)
+}