Refactor service-related code to be shared between android and IOS.

The IOS code is totally untested. Need a Mac to test it.

packages/flutter_tools/lib/src/artifacts.dart

@@ -253,26 +253,34 @@ class ArtifactStore {
   }
 
   /// Download a file from the given url and write it to the cache.
-  static Future _downloadFileToCache(Uri url, File cachedFile) async {
+  /// If [unzip] is true, treat the url as a zip file, and unzip it to the
+  /// directory given.
+  static Future _downloadFileToCache(Uri url, FileSystemEntity cachedFile, bool unzip) async {
     if (!cachedFile.parent.existsSync())
       cachedFile.parent.createSync(recursive: true);
 
     List<int> fileBytes = await _downloadFile(url);
-    cachedFile.writeAsBytesSync(fileBytes, flush: true);
+    if (unzip) {
+      if (cachedFile is Directory && !cachedFile.existsSync())
+        cachedFile.createSync(recursive: true);
+
+      Archive archive = new ZipDecoder().decodeBytes(fileBytes);
+      for (ArchiveFile archiveFile in archive) {
+        File subFile = new File(path.join(cachedFile.path, archiveFile.name));
+        subFile.writeAsBytesSync(archiveFile.content, flush: true);
+      }
+    } else {
+      File asFile = new File(cachedFile.path);
+      asFile.writeAsBytesSync(fileBytes, flush: true);
+    }
   }
 
   /// Download the artifacts.zip archive for the given platform from GCS
   /// and extract it to the local cache.
   static Future _doDownloadArtifactsFromZip(String platform) async {
     String url = getCloudStorageBaseUrl(platform) + 'artifacts.zip';
-    List<int> zipBytes = await _downloadFile(Uri.parse(url));
-
-    Archive archive = new ZipDecoder().decodeBytes(zipBytes);
     Directory cacheDir = _getCacheDirForPlatform(platform);
-    for (ArchiveFile archiveFile in archive) {
-      File cacheFile = new File(path.join(cacheDir.path, archiveFile.name));
-      cacheFile.writeAsBytesSync(archiveFile.content, flush: true);
-    }
+    await _downloadFileToCache(Uri.parse(url), cacheDir, true);
 
     for (Artifact artifact in knownArtifacts) {
       if (artifact.platform == platform && artifact.executable) {
@@ -334,7 +342,7 @@ class ArtifactStore {
     return cachedFile.path;
   }
 
-  static Future<String> getThirdPartyFile(String urlStr, String cacheSubdir) async {
+  static Future<String> getThirdPartyFile(String urlStr, String cacheSubdir, bool unzip) async {
     Uri url = Uri.parse(urlStr);
     Directory baseDir = _getBaseCacheDir();
     Directory cacheDir = new Directory(path.join(
@@ -343,7 +351,7 @@ class ArtifactStore {
         path.join(cacheDir.path, url.pathSegments[url.pathSegments.length-1]));
     if (!cachedFile.existsSync()) {
       try {
-        await _downloadFileToCache(url, cachedFile);
+        await _downloadFileToCache(url, cachedFile, unzip);
       } catch (e) {
         printError('Failed to fetch third-party artifact: $url: $e');
         throw new ProcessExit(2);

packages/flutter_tools/lib/src/commands/apk.dart

@@ -3,11 +3,9 @@
 // found in the LICENSE file.
 
 import 'dart:async';
-import 'dart:convert';
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
-import 'package:yaml/yaml.dart';
 
 import '../android/device_android.dart';
 import '../application_package.dart';
@@ -19,6 +17,7 @@ import '../build_configuration.dart';
 import '../device.dart';
 import '../flx.dart' as flx;
 import '../runner/flutter_command.dart';
+import '../services.dart';
 import '../toolchain.dart';
 import 'start.dart';
 
@@ -27,7 +26,6 @@ const String _kDefaultOutputPath = 'build/app.apk';
 const String _kDefaultResourcesPath = 'apk/res';
 
 const String _kFlutterManifestPath = 'flutter.yaml';
-const String _kPubspecYamlPath = 'pubspec.yaml';
 const String _kPackagesStatusPath = '.packages';
 
 // Alias of the key provided in the Chromium debug keystore
@@ -144,14 +142,6 @@ class ApkKeystoreInfo {
   ApkKeystoreInfo({ this.keystore, this.password, this.keyAlias, this.keyPassword });
 }
 
-// TODO(mpcomplete): find a better home for this.
-dynamic _loadYamlFile(String path) {
-  if (!FileSystemEntity.isFileSync(path))
-    return null;
-  String manifestString = new File(path).readAsStringSync();
-  return loadYaml(manifestString);
-}
-
 class ApkCommand extends FlutterCommand {
   final String name = 'apk';
   final String description = 'Build an Android APK package.';
@@ -214,37 +204,6 @@ class ApkCommand extends FlutterCommand {
   }
 }
 
-Future _findServices(_ApkComponents components) async {
-  if (!ArtifactStore.isPackageRootValid)
-    return;
-
-  dynamic manifest = _loadYamlFile(_kFlutterManifestPath);
-  if (manifest['services'] == null)
-    return;
-
-  for (String service in manifest['services']) {
-    String serviceRoot = '${ArtifactStore.packageRoot}/$service/apk';
-    dynamic serviceConfig = _loadYamlFile('$serviceRoot/config.yaml');
-    if (serviceConfig == null || serviceConfig['jars'] == null)
-      continue;
-    components.services.addAll(serviceConfig['services']);
-    for (String jar in serviceConfig['jars']) {
-      if (jar.startsWith("android-sdk:")) {
-        // Jar is something shipped in the standard android SDK.
-        jar = jar.replaceAll('android-sdk:', '${components.androidSdk.path}/');
-        components.jars.add(new File(jar));
-      } else if (jar.startsWith("http")) {
-        // Jar is a URL to download.
-        String cachePath = await ArtifactStore.getThirdPartyFile(jar, service);
-        components.jars.add(new File(cachePath));
-      } else {
-        // Assume jar is a path relative to the service's root dir.
-        components.jars.add(new File(path.join(serviceRoot, jar)));
-      }
-    }
-  }
-}
-
 Future<_ApkComponents> _findApkComponents(
   BuildConfiguration config, String enginePath, String manifest, String resources
 ) async {
@@ -283,7 +242,9 @@ Future<_ApkComponents> _findApkComponents(
   components.debugKeystore = new File(artifactPaths[3]);
   components.resources = new Directory(resources);
 
-  await _findServices(components);
+  await parseServiceConfigs(components.services,
+                            jars: components.jars,
+                            androidSdk: components.androidSdk.path);
 
   if (!components.resources.existsSync()) {
     // TODO(eseidel): This level should be higher when path is manually set.
@@ -313,24 +274,6 @@ Future<_ApkComponents> _findApkComponents(
   return components;
 }
 
-// Outputs a services.json file for the flutter engine to read. Format:
-// {
-//   services: [
-//     { name: string, class: string },
-//     ...
-//   ]
-// }
-void _generateServicesConfig(File servicesConfig, List<Map<String, String>> servicesIn) {
-  List<Map<String, String>> services =
-      servicesIn.map((Map<String, String> service) => {
-        'name': service['name'],
-        'class': service['registration-class']
-      }).toList();
-
-  Map<String, dynamic> json = { 'services': services };
-  servicesConfig.writeAsStringSync(JSON.encode(json), mode: FileMode.WRITE, flush: true);
-}
-
 int _buildApk(
   _ApkComponents components, String flxPath, ApkKeystoreInfo keystore, String outputFile
 ) {
@@ -341,8 +284,8 @@ int _buildApk(
     File classesDex = new File('${tempDir.path}/classes.dex');
     builder.compileClassesDex(classesDex, components.jars);
 
-    File servicesConfig = new File('${tempDir.path}/services.json');
-    _generateServicesConfig(servicesConfig, components.services);
+    File servicesConfig =
+        generateServiceDefinitions(tempDir.path, components.services, ios: false);
 
     _AssetBuilder assetBuilder = new _AssetBuilder(tempDir, 'assets');
     assetBuilder.add(components.icuData, 'icudtl.dat');
@@ -438,7 +381,7 @@ Future<int> buildAndroid({
   String flxPath: '',
   ApkKeystoreInfo keystore
 }) async {
-  if (!_needsRebuild(outputFile, manifest)) {
+  if (!force && !_needsRebuild(outputFile, manifest)) {
     printTrace('APK up to date. Skipping build step.');
     return 0;
   }

packages/flutter_tools/lib/src/ios/device_ios.dart

@@ -13,6 +13,7 @@ import '../base/globals.dart';
 import '../base/process.dart';
 import '../build_configuration.dart';
 import '../device.dart';
+import '../services.dart';
 import '../toolchain.dart';
 import 'simulator.dart';
 
@@ -171,7 +172,6 @@ class IOSDevice extends Device {
 
     // Step 1: Install the precompiled application if necessary
     bool buildResult = await _buildIOSXcodeProject(app, true);
-
     if (!buildResult) {
       printError('Could not build the precompiled application for the device');
       return false;
@@ -179,13 +179,15 @@ class IOSDevice extends Device {
 
     // Step 2: Check that the application exists at the specified path
     Directory bundle = new Directory(path.join(app.localPath, 'build', 'Release-iphoneos', 'Runner.app'));
-
     bool bundleExists = bundle.existsSync();
     if (!bundleExists) {
       printError('Could not find the built application bundle at ${bundle.path}');
       return false;
     }
 
+    // Step 2.5: Copy any third-party sevices to the app bundle.
+    await _addServicesToBundle(bundle);
+
     // Step 3: Attempt to install the application on the device
     int installationResult = await runCommandAndStreamOutput([
       '/usr/bin/env',
@@ -324,6 +326,9 @@ class IOSSimulator extends Device {
       return false;
     }
 
+    // Step 2.5: Copy any third-party sevices to the app bundle.
+    await _addServicesToBundle(bundle);
+
     // Step 3: Install the updated bundle to the simulator
     SimControl.install(id, path.absolute(bundle.path));
 
@@ -536,3 +541,53 @@ Future<bool> _buildIOSXcodeProject(ApplicationPackage app, bool isDevice) async
     return false;
   }
 }
+
+bool enabled = false;
+Future _addServicesToBundle(Directory bundle) async {
+  if (enabled) {
+    List<Map<String, String>> services = [];
+    await parseServiceConfigs(services);
+    await _fetchFrameworks(services);
+    _copyFrameworksToBundle(bundle.path, services);
+
+    generateServiceDefinitions(bundle.path, services, ios: true);
+  }
+}
+
+Future _fetchFrameworks(List<Map<String, String>> services) async {
+  for (Map<String, String> service in services) {
+    String frameworkUrl = service['framework'];
+    service['framework-path'] = await getServiceFromUrl(
+       frameworkUrl, service['root'], service['name'], unzip: true);
+  }
+}
+
+void _copyFrameworksToBundle(String destDir, List<Map<String, String>> services) {
+  // TODO(mpcomplete): check timestamps.
+  for (Map<String, String> service in services) {
+    String basename = path.basename(service['framework-path']);
+    String destPath = path.join(destDir, basename);
+    _copyDirRecursive(service['framework-path'], destPath);
+  }
+}
+
+void _copyDirRecursive(String fromPath, String toPath) {
+  Directory fromDir = new Directory(fromPath);
+  if (!fromDir.existsSync())
+    throw new Exception('Source directory "${fromDir.path}" does not exist');
+
+  Directory toDir = new Directory(toPath);
+  if (!toDir.existsSync())
+    toDir.createSync(recursive: true);
+
+  for (FileSystemEntity entity in fromDir.listSync()) {
+    String newPath = '${toDir.path}/${path.basename(entity.path)}';
+    if (entity is File) {
+      entity.copySync(newPath);
+    } else if (entity is Directory) {
+      _copyDirRecursive(entity.path, newPath);
+    } else {
+      throw new Exception('Unsupported file type for recursive copy.');
+    }
+  };
+}

packages/flutter_tools/lib/src/services.dart

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:path/path.dart' as path;
+import 'package:yaml/yaml.dart';
+
+import 'artifacts.dart';
+
+const String _kFlutterManifestPath = 'flutter.yaml';
+
+dynamic _loadYamlFile(String path) {
+  if (!FileSystemEntity.isFileSync(path))
+    return null;
+  String manifestString = new File(path).readAsStringSync();
+  return loadYaml(manifestString);
+}
+
+/// Loads all services specified in `flutter.yaml`. Parses each service config file,
+/// storing metadata in [services] and the list of jar files in [jars].
+Future parseServiceConfigs(
+  List<Map<String, String>> services, { List<File> jars, String androidSdk }
+) async {
+  if (!ArtifactStore.isPackageRootValid)
+    return;
+
+  dynamic manifest = _loadYamlFile(_kFlutterManifestPath);
+  if (manifest['services'] == null)
+    return;
+
+  for (String service in manifest['services']) {
+    String serviceRoot = '${ArtifactStore.packageRoot}/$service';
+    dynamic serviceConfig = _loadYamlFile('$serviceRoot/config.yaml');
+    if (serviceConfig == null)
+      continue;
+
+    for (Map<String, String> service in serviceConfig['services']) {
+      services.add({
+        'root': serviceRoot,
+        'name': service['name'],
+        'android-class': service['android-class'],
+        'ios-framework': service['ios-framework']
+      });
+    }
+
+    if (jars != null) {
+      for (String jar in serviceConfig['jars'])
+        jars.add(new File(await getServiceFromUrl(jar, serviceRoot, service, androidSdk: androidSdk, unzip: false)));
+    }
+  }
+}
+
+Future<String> getServiceFromUrl(
+  String url, String rootDir, String serviceName, { String androidSdk, bool unzip: false }
+) async {
+  if (url.startsWith("android-sdk:")) {
+    // It's something shipped in the standard android SDK.
+    return url.replaceAll('android-sdk:', '$androidSdk/');
+  } else if (url.startsWith("http")) {
+    // It's a regular file to download.
+    return await ArtifactStore.getThirdPartyFile(url, serviceName, unzip);
+  } else {
+    // Assume url is a path relative to the service's root dir.
+    return path.join(rootDir, url);
+  }
+}
+
+/// Outputs a services.json file for the flutter engine to read. Format:
+/// {
+///   services: [
+///     { name: string, framework: string },
+///     ...
+///   ]
+/// }
+File generateServiceDefinitions(
+  String dir, List<Map<String, String>> servicesIn, { bool ios }
+) {
+  assert(ios != null);
+
+  String keyOut = ios ? 'framework' : 'class';
+  String keyIn = ios ? 'framework-path' : 'android-class';
+  // TODO(mpcomplete): we should use the same filename for consistency.
+  String filename = ios ? 'ServiceDefinitions.json' : 'services.json';
+  List<Map<String, String>> services =
+      servicesIn.map((Map<String, String> service) => {
+        'name': service['name'],
+        keyOut: service[keyIn]
+      }).toList();
+
+  Map<String, dynamic> json = { 'services': services };
+  File servicesFile = new File(path.join(dir, filename));
+  servicesFile.writeAsStringSync(JSON.encode(json), mode: FileMode.WRITE, flush: true);
+  return servicesFile;
+}

packages/gcm/lib/apk/config.yaml → packages/gcm/lib/config.yaml

 services:
   - name: gcm::GcmService
-    registration-class: org.domokit.gcm.RegistrationIntentService$MojoService
+    android-class: org.domokit.gcm.RegistrationIntentService$MojoService
 jars:
   - android-sdk:extras/google/google_play_services/libproject/google-play-services_lib/libs/google-play-services.jar
   - android-sdk:extras/android/support/v13/android-support-v13.jar
@@ -8,6 +8,3 @@ jars:
   - android-sdk:extras/android/support/v7/mediarouter/libs/android-support-v7-mediarouter.jar
   - https://storage.googleapis.com/mojo_infra/flutter/7bce54b79ef9ee57999cc8e258d664a88723d56d/android-arm/gcm/gcm_lib.dex.jar
   - https://storage.googleapis.com/mojo_infra/flutter/7bce54b79ef9ee57999cc8e258d664a88723d56d/android-arm/gcm/interfaces_java.dex.jar
-todo: >
-  Maybe we should link to a URL to download the jars. Might need different
-  versions per platform, etc.