polymer-cli/src/commands/init.ts

A commandline tool for Polymer projects

/**
 * @license
 * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at
 * http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at
 * http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at
 * http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at
 * http://polymer.github.io/PATENTS.txt
 */

// Be careful with these imports. As many as possible should be dynamic imports
// in the run method in order to minimize startup time from loading unused code.

import {ArgDescriptor} from 'command-line-args';
import * as logging from 'plylog';
import {ProjectConfig} from 'polymer-project-config';

import {Command, CommandOptions} from './command';

const logger = logging.getLogger('cli.command.init');

export class InitCommand implements Command {
  name = 'init';
  aliases = [];

  description = 'Initializes a Polymer project';

  args: ArgDescriptor[] = [{
    name: 'name',
    description: 'The template name to use to initialize the project',
    type: String,
    defaultOption: true,
  }];

  async run(options: CommandOptions, _config: ProjectConfig) {
    // Defer dependency loading until needed
    const polymerInit = await import('../init/init');

    const templateName = options['name'];
    if (templateName) {
      const subgen = (templateName.indexOf(':') !== -1) ? '' : ':app';
      const generatorName = `polymer-init-${templateName}${subgen}`;
      logger.debug('template name provided', {
        generator: generatorName,
        template: templateName,
      });
      return polymerInit.runGenerator(generatorName, options);
    }

    logger.debug('no template name provided, prompting user...');
    return polymerInit.promptGeneratorSelection();
  }
}