1 files changed, 48 insertions, 0 deletions
diff --git a/node_modules/workbox-build/src/lib/cdn-utils.js b/node_modules/workbox-build/src/lib/cdn-utils.js
new file mode 100644
index 00000000..4231341a
--- /dev/null
+++ b/node_modules/workbox-build/src/lib/cdn-utils.js
@@ -0,0 +1,48 @@
+/*
+  Copyright 2017 Google Inc.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+      https://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+const assert = require('assert');
+
+const cdn = require('../cdn-details.json');
+const errors = require('./errors');
+
+const getCDNOrigin = () => {
+  return `${cdn.origin}/${cdn.bucketName}/${cdn.releasesDir}`;
+};
+
+const getVersionedCDNUrl = () => {
+  return `${getCDNOrigin()}/${cdn.latestVersion}`;
+};
+
+const getModuleUrl = (moduleName, buildType) => {
+  assert(moduleName, errors['no-module-name']);
+
+  if (buildType) {
+    const pkgJson = require(`${moduleName}/package.json`);
+    if (buildType === 'dev' && pkgJson.workbox.prodOnly) {
+      // This is not due to a public-facing exception, so just throw an Error(),
+      // without creating an entry in errors.js.
+      throw Error(`The 'dev' build of ${moduleName} is not available.`);
+    }
+    return `${getVersionedCDNUrl()}/${moduleName}.${buildType.slice(0, 4)}.js`;
+  }
+  return `${getVersionedCDNUrl()}/${moduleName}.js`;
+};
+
+module.exports = {
+  getCDNOrigin,
+  getModuleUrl,
+};