ember-cli/lib/tasks/create-and-step-into-directory.js

Command line tool for developing ambitious ember.js apps

'use strict';

// Creates a directory with the name directoryName in cwd and then sets cwd to
// this directory.

const fs = require('fs-extra');
const Task = require('../models/task');
const SilentError = require('silent-error');

class CreateTask extends Task {
  // Options: String directoryName, Boolean: dryRun

  warnDirectoryAlreadyExists() {
    let message = `Directory '${this.directoryName}' already exists.`;
    return new SilentError(message);
  }

  async run(options) {
    let directoryName = (this.directoryName = options.directoryName);
    if (options.dryRun) {
      if (fs.existsSync(directoryName) && fs.readdirSync(directoryName).length) {
        throw this.warnDirectoryAlreadyExists();
      }
      return;
    }

    try {
      await fs.mkdir(directoryName);
    } catch (err) {
      if (err.code === 'EEXIST') {
        // Allow using directory if it is empty.
        if (fs.readdirSync(directoryName).length) {
          throw this.warnDirectoryAlreadyExists();
        }
      } else {
        throw err;
      }
    }
    let cwd = process.cwd();
    process.chdir(directoryName);
    return { initialDirectory: cwd };
  }
}

module.exports = CreateTask;