angular-cli/packages/angular/cli/commands/help.ts

/**
 * @license
 * Copyright Google Inc. 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
 */

// tslint:disable:no-global-tslint-disable no-any
import { terminal } from '@angular-devkit/core';
import { Command, Option } from '../models/command';


export class HelpCommand extends Command {
  public readonly name = 'help';
  public readonly description = 'Help.';
  public readonly arguments: string[] = [];
  public readonly options: Option[] = [];

  run(options: any) {
    const commands = Object.keys(options.commandMap)
      .map(key => {
        const Cmd = options.commandMap[key];
        const command: Command = new Cmd(null, null);

        return command;
      })
      .filter(cmd => !cmd.hidden && !cmd.unknown)
      .map(cmd => ({
        name: cmd.name,
        description: cmd.description,
      }));
    this.logger.info(`Available Commands:`);
    commands.forEach(cmd => {
      this.logger.info(`  ${terminal.cyan(cmd.name)} ${cmd.description}`);
    });

    this.logger.info(`\nFor more detailed help run "ng [command name] --help"`);
  }

  printHelp(options: any) {
    return this.run(options);
  }
}