Function writeDiffOrFail

build-system/common/diff.js:39–63

* Diffs a file against new content. * If `argv.fix` is true, the file is written with the new content, otherwise * errors out. * @param {string} callerTask * @param {string} filepath * @param {string} tentative * @param {Array =} opt_gitDiffFlags * @return {Promise }

(
  callerTask,
  filepath,
  tentative,
  opt_gitDiffFlags
)

 * @return {Promise<void>}
 */
async function writeDiffOrFail(
  callerTask,
  filepath,
  tentative,
  opt_gitDiffFlags
) {
  const diff = await diffTentative(filepath, tentative, opt_gitDiffFlags);

  if (!diff.length) {
    return;
  }

  logWithoutTimestamp();
  logWithoutTimestamp(diff);
  logWithoutTimestamp();

  if (!argv.fix) {
    log(red('ERROR:'), cyan(filepath), 'is missing the changes above.');
    log('⤷ To automatically apply them, run', cyan(`amp ${callerTask} --fix`));
    throw new Error(`${filepath} is outdated`);
  }

  await writeFile(filepath, tentative);
  log('Wrote', bold(blue(filepath)));
}

module.exports = {
  diffTentative,