Function writeIfUpdated

build-system/common/update-packages.js:18–26

* Writes the given contents to the patched file if updated * @param {string} patchedName Name of patched file * @param {string} file Contents to write

(patchedName, file)

 * @param {string} file Contents to write
 */
function writeIfUpdated(patchedName, file) {
  if (
    !fs.existsSync(patchedName) ||
    fs.readFileSync(patchedName, 'utf8') != file
  ) {
    fs.writeFileSync(patchedName, file);
    logLocalDev('Patched', cyan(patchedName));
  }
}

/**
 * Patches Web Animations polyfill by wrapping its body into `install` function.