feat(dev-infra): create a wizard for building commit messages (#38457)

Creates a wizard to walk through creating a commit message in the correct
template for commit messages in Angular repositories.

PR Close #38457

dev-infra/utils/BUILD.bazel

@@ -17,6 +17,7 @@ ts_library(
         "@npm//@types/shelljs",
         "@npm//chalk",
         "@npm//inquirer",
+        "@npm//inquirer-autocomplete-prompt",
         "@npm//shelljs",
         "@npm//tslib",
         "@npm//typed-graphqlify",

dev-infra/utils/console.ts

@@ -7,7 +7,8 @@
  */
 
 import chalk from 'chalk';
-import {prompt} from 'inquirer';
+import {createPromptModule, ListChoiceOptions, prompt} from 'inquirer';
+import * as inquirerAutocomplete from 'inquirer-autocomplete-prompt';
 
 
 /** Reexport of chalk colors for convenient access. */
@@ -26,6 +27,52 @@ export async function promptConfirm(message: string, defaultValue = false): Prom
       .result;
 }
 
+/** Prompts the user to select an option from a filterable autocomplete list. */
+export async function promptAutocomplete(
+    message: string, choices: (string|ListChoiceOptions)[]): Promise<string>;
+/**
+ * Prompts the user to select an option from a filterable autocomplete list, with an option to
+ * choose no value.
+ */
+export async function promptAutocomplete(
+    message: string, choices: (string|ListChoiceOptions)[],
+    noChoiceText?: string): Promise<string|false>;
+export async function promptAutocomplete(
+    message: string, choices: (string|ListChoiceOptions)[],
+    noChoiceText?: string): Promise<string|false> {
+  // Creates a local prompt module with an autocomplete prompt type.
+  const prompt = createPromptModule({}).registerPrompt('autocomplete', inquirerAutocomplete);
+  if (noChoiceText) {
+    choices = [noChoiceText, ...choices];
+  }
+  // `prompt` must be cast as `any` as the autocomplete typings are not available.
+  const result = (await (prompt as any)({
+                   type: 'autocomplete',
+                   name: 'result',
+                   message,
+                   source: (_: any, input: string) => {
+                     if (!input) {
+                       return Promise.resolve(choices);
+                     }
+                     return Promise.resolve(choices.filter(choice => {
+                       if (typeof choice === 'string') {
+                         return choice.includes(input);
+                       }
+                       return choice.name!.includes(input);
+                     }));
+                   }
+                 })).result;
+  if (result === noChoiceText) {
+    return false;
+  }
+  return result;
+}
+
+/** Prompts the user for one line of input. */
+export async function promptInput(message: string): Promise<string> {
+  return (await prompt<{result: string}>({type: 'input', name: 'result', message})).result;
+}
+
 /**
  * Supported levels for logging functions.
  *

dev-infra/utils/inquirer-autocomplete-typings.d.ts

@@ -0,0 +1,17 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+// inquirer-autocomplete-prompt doesn't provide types and no types are made available via
+// DefinitelyTyped.
+declare module "inquirer-autocomplete-prompt" {
+
+  import {registerPrompt} from 'inquirer';
+
+  let AutocompletePrompt: Parameters<typeof registerPrompt>[1];
+  export = AutocompletePrompt;
+}