react-native/local-cli/core/makeCommand.js

/**
 * 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';

const spawn = require('child_process').spawn;

module.exports = function makeCommand(command) {
  return (cb) => {
    if (!cb) {
      throw new Error(`You missed a callback function for the ${command} command`);
    }

    const args = command.split(' ');
    const cmd = args.shift();

    const commandProcess = spawn(cmd, args, {
      stdio: 'inherit',
      stdin: 'inherit',
    });

    commandProcess.on('close', function prelink(code) {
      if (code) {
        throw new Error(`Error occured during executing "${command}" command`);
      }

      cb();
    });
  };
};