function saveAsAssets()

in packages/metro/src/shared/output/RamBundle/as-assets.js [36:86]

• 46 lines of code
• 3 McCabe index (conditional complexity)

function saveAsAssets(
  bundle: RamBundleInfo,
  options: OutputOptions,
  log: (...args: Array<string>) => void,
): Promise<mixed> {
  const {
    bundleOutput,
    bundleEncoding: encoding,
    sourcemapOutput,
    sourcemapSourcesRoot,
  } = options;

  log('start');
  const {startupModules, lazyModules} = bundle;
  log('finish');
  const startupCode = joinModules(startupModules);

  log('Writing bundle output to:', bundleOutput);
  const modulesDir = path.join(path.dirname(bundleOutput), MODULES_DIR);
  const writeUnbundle = createDir(modulesDir).then(
    // create the modules directory first
    () =>
      Promise.all([
        writeModules(lazyModules, modulesDir, encoding),
        writeFile(bundleOutput, startupCode, encoding),
        writeMagicFlagFile(modulesDir),
      ]),
  );
  writeUnbundle.then(() => log('Done writing unbundle output'));

  if (sourcemapOutput) {
    const sourceMap = buildSourcemapWithMetadata({
      fixWrapperOffset: true,
      lazyModules: lazyModules.concat(),
      moduleGroups: null,
      startupModules: startupModules.concat(),
    });
    if (sourcemapSourcesRoot !== undefined) {
      relativizeSourceMapInline(sourceMap, sourcemapSourcesRoot);
    }
    const wroteSourceMap = writeSourceMap(
      sourcemapOutput,
      JSON.stringify(sourceMap),
      log,
    );

    return Promise.all([writeUnbundle, wroteSourceMap]);
  } else {
    return writeUnbundle;
  }
}