Function buildExtensionJs

build-system/tasks/extension-helpers.js:549–607

* Build the JavaScript for the extension specified * * @param {string} dir Path to the extension's directory * @param {string} name Name of the extension. Must be the sub directory in * the extensions directory and the name of the JS and optional CSS file. * @param {!Object} options * @ret

(dir, name, options)

 * @return {!Promise}
 */
async function buildExtensionJs(dir, name, options) {
  const isLatest = legacyLatestVersions[options.name] === options.version;
  const {
    filename = await findJsSourceFilename(name, dir),
    version,
    wrapper = 'extension',
  } = options;

  const wrapperOrFn = wrappers[wrapper];
  if (!wrapperOrFn) {
    throw new Error(
      `Unknown options.wrapper "${wrapper}" (${name}:${version})\n` +
        `Expected one of: ${Object.keys(wrappers).join(', ')}`
    );
  }
  const resolvedWrapper =
    typeof wrapperOrFn === 'function'
      ? wrapperOrFn(name, version, argv.esm, options.loadPriority)
      : wrapperOrFn;

  const additionalSuffix = options.additionalSuffix
    ? `.${options.additionalSuffix}`
    : '';
  await compileJs(`${dir}/`, filename, './dist/v0', {
    ...options,
    toName: `${name}-${version}.max${additionalSuffix}.js`,
    minifiedName: `${name}-${version}${additionalSuffix}.js`,
    aliasName: isLatest ? `${name}-latest${additionalSuffix}.js` : '',
    wrapper: resolvedWrapper,
    babelPlugins: wrapper === 'extension' ? extensionBabelPlugins : null,
  });

  // If an incremental watch build fails, simply return.
  if (options.errored) {
    return;
  }

  const aliasBundle = extensionAliasBundles[name];
  const isAliased = aliasBundle && aliasBundle.version == version;

  if (isAliased) {
    const {aliasedVersion} = aliasBundle;
    const src = maybeToEsmName(
      `${name}-${version}${options.minify ? '' : '.max'}${additionalSuffix}.js`
    );
    const dest = maybeToEsmName(
      `${name}-${aliasedVersion}${
        options.minify ? '' : '.max'
      }${additionalSuffix}.js`
    );
    fs.copySync(`dist/v0/${src}`, `dist/v0/${dest}`);
    fs.copySync(`dist/v0/${src}.map`, `dist/v0/${dest}.map`);
  }

  if (name === 'amp-script') {
    await copyWorkerDomResources(version);
    await buildSandboxedProxyIframe(options.minify);
  }