feat(@angular/cli): don't prompt to set up autocompletion for ng update and ng completion commands

`ng update` is most likely called when upgrading a project to the next version and users should be more concerned about their project than their personal terminal setup.

`ng completion` is unconditionally setting up autocompletion, while `ng completion script` is getting the shell script for autocompletion setup. As a result, both of these don't benefit from a prompt and should be safe to skip it.

Author: dgp1130

packages/angular/cli/src/command-builder/command-module.ts

@@ -125,7 +125,10 @@ export abstract class CommandModule<T extends {} = {}> implements CommandModuleI
     }
 
     // Set up autocompletion if appropriate.
-    const autocompletionExitCode = await considerSettingUpAutocompletion(this.context.logger);
+    const autocompletionExitCode = await considerSettingUpAutocompletion(
+      this.commandName,
+      this.context.logger,
+    );
     if (autocompletionExitCode !== undefined) {
       process.exitCode = autocompletionExitCode;
 

packages/angular/cli/src/utilities/completion.ts

@@ -31,11 +31,12 @@ interface CompletionConfig {
  * @returns an exit code if the program should terminate, undefined otherwise.
  */
 export async function considerSettingUpAutocompletion(
+  command: string,
   logger: logging.Logger,
 ): Promise<number | undefined> {
   // Check if we should prompt the user to setup autocompletion.
   const completionConfig = await getCompletionConfig();
-  if (!(await shouldPromptForAutocompletionSetup(completionConfig))) {
+  if (!(await shouldPromptForAutocompletionSetup(command, completionConfig))) {
     return undefined; // Already set up or prompted previously, nothing to do.
   }
 
@@ -106,12 +107,20 @@ async function setCompletionConfig(config: CompletionConfig): Promise<void> {
   await wksp.save();
 }
 
-async function shouldPromptForAutocompletionSetup(config?: CompletionConfig): Promise<boolean> {
+async function shouldPromptForAutocompletionSetup(
+  command: string,
+  config?: CompletionConfig,
+): Promise<boolean> {
   // Force whether or not to prompt for autocomplete to give an easy path for e2e testing to skip.
   if (forceAutocomplete !== undefined) {
     return forceAutocomplete;
   }
 
+  // Don't prompt on `ng update` or `ng completion`.
+  if (command === 'update' || command === 'completion') {
+    return false;
+  }
+
   // Non-interactive and continuous integration systems don't care about autocompletion.
   if (!isTTY()) {
     return false;

tests/legacy-cli/e2e/tests/misc/completion-prompt.ts

@@ -240,6 +240,31 @@ export default async function () {
     }
   });
 
+  // Does *not* prompt for `ng update` commands.
+  await mockHome(async (home) => {
+    // Use `ng update --help` so it's actually a no-op and we don't need to setup a project.
+    const { stdout } = await execWithEnv('ng', ['update', '--help'], {
+      ...DEFAULT_ENV,
+      HOME: home,
+    });
+
+    if (AUTOCOMPLETION_PROMPT.test(stdout)) {
+      throw new Error('`ng update` command incorrectly prompted for autocompletion setup.');
+    }
+  });
+
+  // Does *not* prompt for `ng completion` commands.
+  await mockHome(async (home) => {
+    const { stdout } = await execWithEnv('ng', ['completion'], {
+      ...DEFAULT_ENV,
+      HOME: home,
+    });
+
+    if (AUTOCOMPLETION_PROMPT.test(stdout)) {
+      throw new Error('`ng completion` command incorrectly prompted for autocompletion setup.');
+    }
+  });
+
   // Does *not* prompt user for CI executions.
   {
     const { stdout } = await execWithEnv('ng', ['version'], {