git-diff-apply/src/run.js

Use an unrelated remote repository to apply a git diff

'use strict';

const { promisify } = require('util');
const { exec: _exec, spawn: _spawn } = require('child_process');
const debug = require('./debug');
const execPromise = promisify(_exec);

module.exports.exec = async function exec() {
  debug(...arguments);

  let { stdout } = await execPromise(...arguments);

  if (stdout) {
    debug(stdout);
  }

  return stdout;
};

module.exports.spawn = function spawn(cmd, args = [], options) {
  let command = [cmd, ...args.map(arg => `"${arg}"`)].join(' ');

  debug(command, options);

  let child = _spawn(...arguments);

  let promise = new Promise(function(resolve, reject) {
    let stdout = '';
    let errorMessage = '';

    child.stdout.on('data', function(data) {
      stdout += data;
    });
    child.stderr.on('data', function(data) {
      errorMessage += data;
    });
    child.on('close', function(status) {
      if (status === 0) {
        debug(stdout);

        resolve(stdout);
      } else {
        reject(new Error(`${command} failed with message ${errorMessage}`));
      }
    });
  });

  return Object.assign(promise, child);
};