Merge pull request #64375 from nilebox/delete-wait-cleanup

Automatic merge from submit-queue (batch tested with PRs 64300, 64375). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Declare kubectl wait flag in a way consistent with other deletion flags

**What this PR does / why we need it**:
A follow up PR for #64034 and #63979 that makes declaring wait flag consistent with the other flags.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #64401

**Special notes for your reviewer**:

**Release note**:

```release-note

```

pkg/kubectl/cmd/delete.go

@@ -139,8 +139,6 @@ func NewCmdDelete(f cmdutil.Factory, streams genericclioptions.IOStreams) *cobra
 
 	deleteFlags.AddFlags(cmd)
 
-	cmd.Flags().Bool("wait", true, `If true, wait for resources to be gone before returning.  This waits for finalizers.`)
-
 	cmdutil.AddIncludeUninitializedFlag(cmd)
 	return cmd
 }
@@ -165,14 +163,9 @@ func (o *DeleteOptions) Complete(f cmdutil.Factory, args []string, cmd *cobra.Co
 	}
 	if o.GracePeriod == 0 && !o.ForceDeletion {
 		// To preserve backwards compatibility, but prevent accidental data loss, we convert --grace-period=0
-		// into --grace-period=1 and wait until the object is successfully deleted. Users may provide --force
-		// to bypass this wait.
-		o.WaitForDeletion = true
+		// into --grace-period=1. Users may provide --force to bypass this conversion.
 		o.GracePeriod = 1
 	}
-	if b, err := cmd.Flags().GetBool("wait"); err == nil {
-		o.WaitForDeletion = b
-	}
 
 	includeUninitialized := cmdutil.ShouldIncludeUninitialized(cmd, false)
 	r := f.NewBuilder().
@@ -218,6 +211,11 @@ func (o *DeleteOptions) Validate(cmd *cobra.Command) error {
 		return fmt.Errorf("cannot set --all and --field-selector at the same time")
 	}
 
+	if o.GracePeriod == 0 && !o.ForceDeletion && !o.WaitForDeletion {
+		// With the explicit --wait flag we need extra validation for backward compatibility
+		return fmt.Errorf("--grace-period=0 must have either --force specified, or --wait to be set to true")
+	}
+
 	switch {
 	case o.GracePeriod == 0 && o.ForceDeletion:
 		fmt.Fprintf(o.ErrOut, "warning: Immediate deletion does not wait for confirmation that the running resource has been terminated. The resource may continue to run on the cluster indefinitely.\n")

pkg/kubectl/cmd/delete_flags.go

@@ -39,6 +39,7 @@ type DeleteFlags struct {
 	IgnoreNotFound *bool
 	Now            *bool
 	Timeout        *time.Duration
+	Wait           *bool
 	Output         *string
 }
 
@@ -85,6 +86,9 @@ func (f *DeleteFlags) ToOptions(dynamicClient dynamic.Interface, streams generic
 	if f.Timeout != nil {
 		options.Timeout = *f.Timeout
 	}
+	if f.Wait != nil {
+		options.WaitForDeletion = *f.Wait
+	}
 
 	return options
 }
@@ -118,11 +122,12 @@ func (f *DeleteFlags) AddFlags(cmd *cobra.Command) {
 	if f.IgnoreNotFound != nil {
 		cmd.Flags().BoolVar(f.IgnoreNotFound, "ignore-not-found", *f.IgnoreNotFound, "Treat \"resource not found\" as a successful delete. Defaults to \"true\" when --all is specified.")
 	}
-
+	if f.Wait != nil {
+		cmd.Flags().BoolVar(f.Wait, "wait", *f.Wait, "If true, wait for resources to be gone before returning. This waits for finalizers.")
+	}
 	if f.Output != nil {
 		cmd.Flags().StringVarP(f.Output, "output", "o", *f.Output, "Output mode. Use \"-o name\" for shorter output (resource/name).")
 	}
-
 }
 
 // NewDeleteCommandFlags provides default flags and values for use with the "delete" command
@@ -139,6 +144,7 @@ func NewDeleteCommandFlags(usage string) *DeleteFlags {
 	labelSelector := ""
 	fieldSelector := ""
 	timeout := time.Duration(0)
+	wait := true
 
 	filenames := []string{}
 	recursive := false
@@ -156,6 +162,7 @@ func NewDeleteCommandFlags(usage string) *DeleteFlags {
 		IgnoreNotFound: &ignoreNotFound,
 		Now:            &now,
 		Timeout:        &timeout,
+		Wait:           &wait,
 		Output:         &output,
 	}
 }
@@ -167,6 +174,7 @@ func NewDeleteFlags(usage string) *DeleteFlags {
 
 	force := false
 	timeout := time.Duration(0)
+	wait := false
 
 	filenames := []string{}
 	recursive := false
@@ -180,5 +188,6 @@ func NewDeleteFlags(usage string) *DeleteFlags {
 		// add non-defaults
 		Force:   &force,
 		Timeout: &timeout,
+		Wait:    &wait,
 	}
 }