Function execPromise

transpile.js:93–103

(cmd)

//function to make exec promise
function execPromise(cmd) {
  return new Promise((resolve, reject) => {
    exec(cmd, (error, stdout, stderr) => {
      if (error) {
        console.warn(error);
      }
      resolve(stdout ? stdout : stderr);
      console.log(stdout);
    });
  });
}

//function to compile yulp contracts
async function yulLog() {