add hook only waiter

Signed-off-by: Austin Abro <AustinAbro321@gmail.com>

cmd/helm/flags.go

@@ -54,7 +54,7 @@ func addValueOptionsFlags(f *pflag.FlagSet, v *values.Options) {
 
 func AddWaitFlag(cmd *cobra.Command, wait *kube.WaitStrategy) {
 	cmd.Flags().Var(
-		newWaitValue(wait),
+		newWaitValue(kube.HookOnlyStrategy, wait),
 		"wait",
 		"if set, will wait until all resources are in the expected state before marking the operation as successful. It will wait for as long as --timeout. Options are (true, false, watcher, and legacy)",
 	)
@@ -64,7 +64,8 @@ func AddWaitFlag(cmd *cobra.Command, wait *kube.WaitStrategy) {
 
 type waitValue kube.WaitStrategy
 
-func newWaitValue(ws *kube.WaitStrategy) *waitValue {
+func newWaitValue(defaultValue kube.WaitStrategy, ws *kube.WaitStrategy) *waitValue {
+	*ws = defaultValue
 	return (*waitValue)(ws)
 }
 
@@ -77,7 +78,7 @@ func (ws *waitValue) String() string {
 
 func (ws *waitValue) Set(s string) error {
 	switch s {
-	case string(kube.StatusWatcherStrategy), string(kube.LegacyWaiterStrategy):
+	case string(kube.StatusWatcherStrategy), string(kube.LegacyStrategy):
 		*ws = waitValue(s)
 		return nil
 	case "true":
@@ -87,7 +88,7 @@ func (ws *waitValue) Set(s string) error {
 		*ws = ""
 		return nil
 	default:
-		return fmt.Errorf("invalid wait input %q. Valid inputs are true, false, %s, and %s", s, kube.StatusWatcherStrategy, kube.LegacyWaiterStrategy)
+		return fmt.Errorf("invalid wait input %q. Valid inputs are true, false, %s, and %s", s, kube.StatusWatcherStrategy, kube.LegacyStrategy)
 	}
 }
 

cmd/helm/install.go

@@ -198,7 +198,7 @@ func addInstallFlags(cmd *cobra.Command, f *pflag.FlagSet, client *action.Instal
 	f.BoolVar(&client.Devel, "devel", false, "use development versions, too. Equivalent to version '>0.0.0-0'. If --version is set, this is ignored")
 	f.BoolVar(&client.DependencyUpdate, "dependency-update", false, "update dependencies if they are missing before installing the chart")
 	f.BoolVar(&client.DisableOpenAPIValidation, "disable-openapi-validation", false, "if set, the installation process will not validate rendered templates against the Kubernetes OpenAPI Schema")
-	f.BoolVar(&client.Atomic, "atomic", false, "if set, the installation process deletes the installation on failure. The --wait flag will be set automatically if --atomic is used")
+	f.BoolVar(&client.Atomic, "atomic", false, "if set, the installation process deletes the installation on failure. The --wait flag will be set automatically to \"watcher\" if --atomic is used")
 	f.BoolVar(&client.SkipCRDs, "skip-crds", false, "if set, no CRDs will be installed. By default, CRDs are installed if not already present")
 	f.BoolVar(&client.SubNotes, "render-subchart-notes", false, "if set, render subchart notes along with the parent")
 	f.BoolVar(&client.SkipSchemaValidation, "skip-schema-validation", false, "if set, disables JSON schema validation")

cmd/helm/uninstall.go

@@ -76,10 +76,10 @@ func newUninstallCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 	f.BoolVar(&client.DisableHooks, "no-hooks", false, "prevent hooks from running during uninstallation")
 	f.BoolVar(&client.IgnoreNotFound, "ignore-not-found", false, `Treat "release not found" as a successful uninstall`)
 	f.BoolVar(&client.KeepHistory, "keep-history", false, "remove all associated resources and mark the release as deleted, but retain the release history")
-	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.StringVar(&client.DeletionPropagation, "cascade", "background", "Must be \"background\", \"orphan\", or \"foreground\". Selects the deletion cascading strategy for the dependents. Defaults to background.")
 	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")
+	AddWaitFlag(cmd, &client.Wait)
 
 	return cmd
 }

cmd/helm/upgrade.go

@@ -279,7 +279,7 @@ func newUpgradeCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 	f.BoolVar(&client.ReuseValues, "reuse-values", false, "when upgrading, reuse the last release's values and merge in any overrides from the command line via --set and -f. If '--reset-values' is specified, this is ignored")
 	f.BoolVar(&client.ResetThenReuseValues, "reset-then-reuse-values", false, "when upgrading, reset the values to the ones built into the chart, apply the last release's values and merge in any overrides from the command line via --set and -f. If '--reset-values' or '--reuse-values' is specified, this is ignored")
 	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.Atomic, "atomic", false, "if set, upgrade process rolls back changes made in case of failed upgrade. The --wait flag will be set automatically to \"watcher\" if --atomic is used")
 	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/install.go

@@ -293,9 +293,9 @@ func (i *Install) RunWithContext(ctx context.Context, chrt *chart.Chart, vals ma
 
 	// Make sure if Atomic is set, that wait is set as well. This makes it so
 	// the user doesn't have to specify both
-	if !i.shouldWait() {
+	if i.Wait == kube.HookOnlyStrategy {
 		if i.Atomic {
-			i.Wait = "watcher"
+			i.Wait = kube.StatusWatcherStrategy
 		}
 	}
 
@@ -473,7 +473,6 @@ func (i *Install) performInstall(rel *release.Release, toBeAdopted kube.Resource
 		return rel, err
 	}
 
-	if i.shouldWait() {
 	if i.WaitForJobs {
 		err = i.cfg.KubeClient.WaitWithJobs(resources, i.Timeout)
 	} else {
@@ -482,7 +481,6 @@ func (i *Install) performInstall(rel *release.Release, toBeAdopted kube.Resource
 	if err != nil {
 		return rel, err
 	}
-	}
 
 	if !i.DisableHooks {
 		if err := i.cfg.execHook(rel, release.HookPostInstall, i.Timeout); err != nil {

pkg/action/rollback.go

@@ -228,7 +228,6 @@ func (r *Rollback) performRollback(currentRelease, targetRelease *release.Releas
 		}
 	}
 
-	if r.shouldWait() {
 	if r.WaitForJobs {
 		if err := r.cfg.KubeClient.WaitWithJobs(target, r.Timeout); err != nil {
 			targetRelease.SetStatus(release.StatusFailed, fmt.Sprintf("Release %q failed: %s", targetRelease.Name, err.Error()))
@@ -244,7 +243,6 @@ func (r *Rollback) performRollback(currentRelease, targetRelease *release.Releas
 			return targetRelease, errors.Wrapf(err, "release %s failed", targetRelease.Name)
 		}
 	}
-	}
 
 	// post-rollback hooks
 	if !r.DisableHooks {

pkg/action/uninstall.go

@@ -41,7 +41,7 @@ type Uninstall struct {
 	DryRun              bool
 	IgnoreNotFound      bool
 	KeepHistory         bool
-	Wait                bool
+	Wait                kube.WaitStrategy
 	DeletionPropagation string
 	Timeout             time.Duration
 	Description         string
@@ -130,11 +130,9 @@ func (u *Uninstall) Run(name string) (*release.UninstallReleaseResponse, error)
 	}
 	res.Info = kept
 
-	if u.Wait {
 	if err := u.cfg.KubeClient.WaitForDelete(deletedResources, u.Timeout); err != nil {
 		errs = append(errs, err)
 	}
-	}
 
 	if !u.DisableHooks {
 		if err := u.cfg.execHook(rel, release.HookPostDelete, u.Timeout); err != nil {

pkg/action/uninstall_test.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 
+	"helm.sh/helm/v4/pkg/kube"
 	kubefake "helm.sh/helm/v4/pkg/kube/fake"
 	"helm.sh/helm/v4/pkg/release"
 )
@@ -82,7 +83,7 @@ func TestUninstallRelease_Wait(t *testing.T) {
 	unAction := uninstallAction(t)
 	unAction.DisableHooks = true
 	unAction.DryRun = false
-	unAction.Wait = true
+	unAction.Wait = kube.StatusWatcherStrategy
 
 	rel := releaseStub()
 	rel.Name = "come-fail-away"
@@ -113,7 +114,7 @@ func TestUninstallRelease_Cascade(t *testing.T) {
 	unAction := uninstallAction(t)
 	unAction.DisableHooks = true
 	unAction.DryRun = false
-	unAction.Wait = false
+	unAction.Wait = kube.HookOnlyStrategy
 	unAction.DeletionPropagation = "foreground"
 
 	rel := releaseStub()

pkg/action/upgrade.go

@@ -155,7 +155,7 @@ func (u *Upgrade) RunWithContext(ctx context.Context, name string, chart *chart.
 
 	// Make sure if Atomic is set, that wait is set as well. This makes it so
 	// the user doesn't have to specify both
-	if !u.shouldWait() {
+	if u.Wait == kube.HookOnlyStrategy {
 		if u.Atomic {
 			u.Wait = kube.StatusWatcherStrategy
 		}
@@ -190,10 +190,6 @@ func (u *Upgrade) RunWithContext(ctx context.Context, name string, chart *chart.
 	return res, nil
 }
 
-func (u *Upgrade) shouldWait() bool {
-	return u.Wait != ""
-}
-
 // isDryRun returns true if Upgrade is set to run as a DryRun
 func (u *Upgrade) isDryRun() bool {
 	if u.DryRun || u.DryRunOption == "client" || u.DryRunOption == "server" || u.DryRunOption == "true" {
@@ -451,10 +447,6 @@ func (u *Upgrade) releasingUpgrade(c chan<- resultMessage, upgradedRelease *rele
 		}
 	}
 
-	if u.shouldWait() {
-		u.cfg.Log(
-			"waiting for release %s resources (created: %d updated: %d  deleted: %d)",
-			upgradedRelease.Name, len(results.Created), len(results.Updated), len(results.Deleted))
 	if u.WaitForJobs {
 		if err := u.cfg.KubeClient.WaitWithJobs(target, u.Timeout); err != nil {
 			u.cfg.recordRelease(originalRelease)
@@ -468,7 +460,6 @@ func (u *Upgrade) releasingUpgrade(c chan<- resultMessage, upgradedRelease *rele
 			return
 		}
 	}
-	}
 
 	// post-upgrade hooks
 	if !u.DisableHooks {
@@ -534,7 +525,7 @@ func (u *Upgrade) failRelease(rel *release.Release, created kube.ResourceList, e
 
 		rollin := NewRollback(u.cfg)
 		rollin.Version = filteredHistory[0].Version
-		if !u.shouldWait() {
+		if u.Wait == kube.HookOnlyStrategy {
 			rollin.Wait = kube.StatusWatcherStrategy
 		}
 		rollin.WaitForJobs = u.WaitForJobs

pkg/kube/client.go

@@ -84,7 +84,8 @@ type WaitStrategy string
 
 const (
 	StatusWatcherStrategy WaitStrategy = "watcher"
-	LegacyWaiterStrategy  WaitStrategy = "legacy"
+	LegacyStrategy        WaitStrategy = "legacy"
+	HookOnlyStrategy      WaitStrategy = "noop"
 )
 
 func init() {
@@ -98,15 +99,7 @@ func init() {
 	}
 }
 
-func (c *Client) newWaiter(strategy WaitStrategy) (Waiter, error) {
+func (c *Client) newStatusWatcher() (*statusWaiter, error) {
-	switch strategy {
-	case LegacyWaiterStrategy:
-		kc, err := c.Factory.KubernetesClientSet()
-		if err != nil {
-			return nil, err
-		}
-		return &HelmWaiter{kubeClient: kc, log: c.Log}, nil
-	case StatusWatcherStrategy:
 	cfg, err := c.Factory.ToRESTConfig()
 	if err != nil {
 		return nil, err
@@ -128,6 +121,24 @@ func (c *Client) newWaiter(strategy WaitStrategy) (Waiter, error) {
 		client:     dynamicClient,
 		log:        c.Log,
 	}, nil
+}
+
+func (c *Client) newWaiter(strategy WaitStrategy) (Waiter, error) {
+	switch strategy {
+	case LegacyStrategy:
+		kc, err := c.Factory.KubernetesClientSet()
+		if err != nil {
+			return nil, err
+		}
+		return &HelmWaiter{kubeClient: kc, log: c.Log}, nil
+	case StatusWatcherStrategy:
+		return c.newStatusWatcher()
+	case HookOnlyStrategy:
+		sw, err := c.newStatusWatcher()
+		if err != nil {
+			return nil, err
+		}
+		return &hookOnlyWaiter{sw: sw}, nil
 	default:
 		return nil, errors.New("unknown wait strategy")
 	}

pkg/kube/client_test.go

@@ -513,7 +513,7 @@ func TestWait(t *testing.T) {
 		}),
 	}
 	var err error
-	c.Waiter, err = c.newWaiter(LegacyWaiterStrategy)
+	c.Waiter, err = c.newWaiter(LegacyStrategy)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -570,7 +570,7 @@ func TestWaitJob(t *testing.T) {
 		}),
 	}
 	var err error
-	c.Waiter, err = c.newWaiter(LegacyWaiterStrategy)
+	c.Waiter, err = c.newWaiter(LegacyStrategy)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -629,7 +629,7 @@ func TestWaitDelete(t *testing.T) {
 		}),
 	}
 	var err error
-	c.Waiter, err = c.newWaiter(LegacyWaiterStrategy)
+	c.Waiter, err = c.newWaiter(LegacyStrategy)
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/kube/statuswait.go

@@ -209,3 +209,23 @@ func statusObserver(cancel context.CancelFunc, desired status.Status, logFn func
 		}
 	}
 }
+
+type hookOnlyWaiter struct {
+	sw *statusWaiter
+}
+
+func (w *hookOnlyWaiter) WatchUntilReady(resourceList ResourceList, timeout time.Duration) error {
+	return w.sw.WatchUntilReady(resourceList, timeout)
+}
+
+func (w *hookOnlyWaiter) Wait(resourceList ResourceList, timeout time.Duration) error {
+	return nil
+}
+
+func (w *hookOnlyWaiter) WaitWithJobs(resourceList ResourceList, timeout time.Duration) error {
+	return nil
+}
+
+func (w *hookOnlyWaiter) WaitForDelete(resourceList ResourceList, timeout time.Duration) error {
+	return nil
+}