gistfile1.txt

let cpSpawn = require('child_process').spawn;

async function spawn(cmd, args, opts, handleStdout, handleStderr) {
  return new Promise((resolve, reject) => {
    let handle = cpSpawn(cmd, args, opts);

    handle.stdout.setEncoding('utf8');
    handle.stdout.on('data', d => handleStdout(d.toString()));

    handle.stderr.setEncoding('utf8');
    handle.stderr.on('data', d => handleStderr(d.toString()));

    handle.on('close', (res) => {
      if (res === 0) {
        resolve(res);
      }
      else {
        reject(res);
      }
    });
  });
}

module.exports = spawn;