Move bundle output formats to their own files

Reviewed By: tadeuzagallo

Differential Revision: D2702834

fb-gh-sync-id: fca308c5078a11924e071077822fb77d762bd564

local-cli/bundle/output/prepack.js

@@ -0,0 +1,34 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const writeFile = require('./writeFile');
+
+function buildPrepackBundle(packagerClient, requestOptions) {
+  return packagerClient.buildPrepackBundle(requestOptions);
+}
+
+function savePrepackBundle(bundle, options, log) {
+  const {
+    'bundle-output': bundleOutput,
+    'bridge-config': bridgeConfig,
+  } = options;
+
+  const result = bundle.build({
+    batchedBridgeConfig: bridgeConfig
+  });
+
+  log('Writing prepack bundle output to:', bundleOutput);
+  const writePrepackBundle = writeFile(bundleOutput, result, 'ucs-2');
+  writePrepackBundle.then(() => log('Done writing prepack bundle output'));
+  return writePrepackBundle;
+}
+
+exports.build = buildPrepackBundle;
+exports.save = savePrepackBundle;