let argRegex = new RegExp('(\-\-[a-zA-Z0-9]+)(=)(.*)');

const parseArgs = () => {
  let _args = { '_': [] };
  [...process.argv.slice(2)].forEach(arg => {
    let result = argRegex.exec(arg);
    if (!!result) {
      _args[result[1].replace('--','')] = result[3];
    } else {
      _args['_'].push(arg);
    }
  });

  return _args;
}

export const args = parseArgs();

export const getArg = (argName) => {
  let arg = args[argName];
  if (!!arg) {
    return arg;
  } else {
    throw(`${argName} was not supplied!`);
  }
}