reactors-cli/dist/util/std.js

Command line utility for reactors

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = std;

var _child_process = require('child_process');

var _events = require('events');

var _events2 = _interopRequireDefault(_events);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _toArray(arr) { return Array.isArray(arr) ? arr : Array.from(arr); }

function std(cmd) {
  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

  var emitter = new _events2.default();

  var _cmd$split = cmd.split(/\s+/),
      _cmd$split2 = _toArray(_cmd$split),
      entry = _cmd$split2[0],
      bits = _cmd$split2.slice(1);

  var ps = (0, _child_process.spawn)(entry, bits, options);

  var out = [];
  var err = [];

  ps.on('error', function (error) {
    return emitter.emit('error', error);
  }).on('exit', function (status) {
    process.stdin.unpipe(ps.stdin);
    process.stdin.end();
    if (status === 0) {
      emitter.emit('done', { err: err.join(''), out: out.join('') });
    } else {
      emitter.emit('error', new Error('Got status ' + status));
    }
  });

  ps.stdout.on('data', function (data) {
    out.push(data.toString());
    emitter.emit('message', {
      std: 'out',
      data: data.toString()
    });
  });

  ps.stderr.on('data', function (data) {
    err.push(data.toString());
    emitter.emit('message', {
      std: 'err',
      data: data.toString()
    });
  });

  process.stdin.pipe(ps.stdin);

  return emitter;
}