Add appengine/gcloud/mustache dependencies.

pkg/appengine/lib/api/modules.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library appengine.api.modules;
+
+import 'dart:async';
+
+import 'package:gcloud/service_scope.dart' as ss;
+
+abstract class ModulesService {
+  /**
+   * Returns the current running module name.
+   */
+  String get currentModule;
+
+  /**
+   * Returns the current running module version.
+   */
+  String get currentVersion;
+
+  /**
+   * Returns the current running module instance.
+   */
+  String get currentInstance;
+
+  /**
+   * Completes with the default version for module [module].
+   */
+  Future<String> defaultVersion(String module);
+
+  /**
+   * Completes with a list of all modules.
+   */
+  Future<List<String>> modules();
+
+  /**
+   * Completes with a list of all versions for module [module].
+   */
+  Future<List<String>> versions(String module);
+
+  /**
+   * Completes with a hostname, that can be used to contact a given part of an
+   * application.
+   *
+   * Without any arguments, the result is the hostname for the
+   * default module and default version.
+   *
+   * If [module] is specified, the result is the hostname for the
+   * specified module and the default version.
+   *
+   * If [module] and [version] is specified, the result is the hostname for the
+   * specified module and the specified version.
+   *
+   * Finally if [instance] is also specified, the result is the hostname for
+   * contacting a specific running instance for the specified [module] and
+   * [version].
+   *
+   * For applications served from the appspot.com domain, some of the dots
+   * used to separate the different parts of the hostname will be replaced
+   * by `-dot-`. This is to support application access using HTTPS, and is
+   * required as Google is no longer issuing SSL certificates for
+   * double-wildcard domains hosted at appspot.com (i.e. *.*.appspot.com).
+   */
+  Future<String> hostname([String module, String version, String instance]);
+}
+
+/**
+ * Register a new [ModulesService] object.
+ *
+ * Calling this outside of a service scope or calling it more than once inside
+ * the same service scope will result in an error.
+ *
+ * See the `package:gcloud/service_scope.dart` library for more information.
+ */
+void registerModulesService(ModulesService service) {
+  ss.register(#_appengine.modules, service);
+}
+
+/**
+ * The modules service.
+ *
+ * Request handlers will be run inside a service scope which contains the
+ * modules service.
+ */
+ModulesService get modulesService => ss.lookup(#_appengine.modules);