import promisify from 'util.promisify';
import childProcess from 'child_process';
import {validatePath, resolveHome} from './util';

const exec = promisify(childProcess.exec);

/**
 * Pulls a repo given its path.
 *
 * Returns void. Throws error on failure.
 */
const gitPull = async pathToRepo => {
  const resolvedPath = resolveHome(pathToRepo);

  try {
    validatePath(resolvedPath);
  } catch (e) {
    return Promise.reject(e);
  }

  return exec(`git pull`, {cwd: resolvedPath});
};

export default gitPull;