eject.js

// @remove-file-on-eject
/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */
'use strict';

// Makes the script crash on unhandled rejections instead of silently
// ignoring them. In the future, promise rejections that are not handled will
// terminate the Node.js process with a non-zero exit code.
process.on('unhandledRejection', err => {
  throw err;
});

const fs = require('fs-extra');
const path = require('path');
const execSync = require('child_process').execSync;
const chalk = require('chalk');
const paths = require('../config/paths');
const createJestConfig = require('./utils/createJestConfig');
const inquirer = require('react-dev-utils/inquirer');
const spawnSync = require('react-dev-utils/crossSpawn').sync;

const green = chalk.green;
const cyan = chalk.cyan;

function getGitStatus() {
  try {
    let stdout = execSync(`git status --porcelain`, {
      stdio: ['pipe', 'pipe', 'ignore'],
    }).toString();
    return stdout.trim();
  } catch (e) {
    return '';
  }
}

inquirer
  .prompt({
    type: 'confirm',
    name: 'shouldEject',
    message: 'Are you sure you want to eject? This action is permanent.',
    default: false,
  })
  .then(answer => {
    if (!answer.shouldEject) {
      console.log(cyan('Close one! Eject aborted.'));
      return;
    }

    const gitStatus = getGitStatus();
    if (gitStatus) {
      console.error(
        chalk.red(
          `This git repository has untracked files or uncommitted changes:\n\n` +
            gitStatus.split('\n').map(line => '  ' + line) +
            '\n\n' +
            'Remove untracked files, stash or commit any changes, and try again.'
        )
      );
      process.exit(1);
    }

    console.log('Ejecting...');

    const ownPath = paths.ownPath;