Remove the delete propagation flag (knative#770)

* Remove the delete propagation flag

In it's current state it now takes me about 25 seconds for the `kn delete`
to complete. Before knative#682 it used to be
almost immediate. This is because we now pass in the
`DeletePropagationBackground` flag. I believe this is a mistake, not only
because of the 20+ seconds of additional time to delete things, but IMO
the CLI should talk to the server in the same way regardless of the --wait
flag. That flag should just be a CLI thing to indicate if the user wants the CLI
to wait for the server to complete but not HOW the server should do the delete.

Signed-off-by: Doug Davis <dug@us.ibm.com>

* try just tweaking the --no-wait flag

Signed-off-by: Doug Davis <dug@us.ibm.com>

docs/cmd/kn_revision_delete.md

@@ -24,7 +24,7 @@ kn revision delete NAME [flags]
       --async              DEPRECATED: please use --no-wait instead. Delete revision and don't wait for it to be deleted.
   -h, --help               help for delete
   -n, --namespace string   Specify the namespace to operate in.
-      --no-wait            Delete revision and don't wait for it to be deleted.
+      --no-wait            Delete revision and don't wait for it to be deleted. (default true)
       --wait-timeout int   Seconds to wait before giving up on waiting for revision to be deleted. (default 600)
 ```
 

docs/cmd/kn_service_delete.md

@@ -27,7 +27,7 @@ kn service delete NAME [flags]
       --async              DEPRECATED: please use --no-wait instead. Delete service and don't wait for it to be deleted.
   -h, --help               help for delete
   -n, --namespace string   Specify the namespace to operate in.
-      --no-wait            Delete service and don't wait for it to be deleted.
+      --no-wait            Delete service and don't wait for it to be deleted. (default true)
       --wait-timeout int   Seconds to wait before giving up on waiting for service to be deleted. (default 600)
 ```
 

pkg/kn/commands/wait_flags.go

@@ -42,8 +42,15 @@ type WaitFlags struct {
 func (p *WaitFlags) AddConditionWaitFlags(command *cobra.Command, waitTimeoutDefault int, action, what, until string) {
 	waitUsage := fmt.Sprintf("%s %s and don't wait for it to be %s.", action, what, until)
 	//TODO: deprecated flag should be removed in next release
+
+	// Special-case 'delete' command so it comes back to the user immediately
+	noWaitDefault := false
+	if action == "Delete" {
+		noWaitDefault = true
+	}
+
 	command.Flags().BoolVar(&p.Async, "async", false, "DEPRECATED: please use --no-wait instead. "+waitUsage)
-	command.Flags().BoolVar(&p.NoWait, "no-wait", false, waitUsage)
+	command.Flags().BoolVar(&p.NoWait, "no-wait", noWaitDefault, waitUsage)
 
 	timeoutUsage := fmt.Sprintf("Seconds to wait before giving up on waiting for %s to be %s.", what, until)
 	command.Flags().IntVar(&p.TimeoutInSeconds, "wait-timeout", waitTimeoutDefault, timeoutUsage)

pkg/kn/commands/wait_flags_test.go

@@ -115,3 +115,12 @@ func TestAddWaitUsageMessage(t *testing.T) {
 		t.Error("wrong until message")
 	}
 }
+
+func TestAddWaitUsageDelete(t *testing.T) {
+	flags := &WaitFlags{}
+	cmd := cobra.Command{}
+	flags.AddConditionWaitFlags(&cmd, 60, "Delete", "blub", "deleted")
+	if !strings.Contains(cmd.UsageString(), "deleted. (default true)") {
+		t.Error("Delete has wrong default value for --no-wait")
+	}
+}