excuteSubCommand.js

Command.prototype.executeSubCommand = function(argv, args, unknown) {
  args = args.concat(unknown);

  if (!args.length) this.help();
  if ('help' == args[0] && 1 == args.length) this.help();

  // <cmd> --help
  if ('help' == args[0]) {
    args[0] = args[1];
    args[1] = '--help';
  }

  // executable
  var dir = dirname(argv[1]);
  var bin = basename(argv[1]) + '-' + args[0];

  // check for ./<bin> first
  var local = path.join(dir, bin);

  // run it
  args = args.slice(1);

  var proc = spawn(local, args, { stdio: 'inherit', customFds: [0, 1, 2] });
  proc.on('error', function(err){
    if (err.code == "ENOENT") {
      if (process.platform == 'win32') {
        return _executeSubCommandInWin();
      }
      console.error('\n  %s(1) does not exist, try --help\n', bin);
    } else if (err.code == "EACCES") {
      console.error('\n  %s(1) not executable. try chmod or run with root\n', bin);
    }
  });
  this.runningCommand = proc;

  // try to excute sub command with node in windows
  var self = this;
  function _executeSubCommandInWin() {
    args.unshift(local);
    proc = spawn(process.execPath, args, { stdio: 'inherit', customFds: [0, 1, 2] });
    proc.on('error', function () {
      if (err.code == "ENOENT") {
        console.error('\n  %s(1) does not exist, try --help\n', bin);
      } else if (err.code == "EACCES") {
        console.error('\n  %s(1) not executable. try chmod or run with root\n', bin);
      }
    });
    self.runningCommand = proc;
  }
};