measure IPA size (#7158)

dev/devicelab/bin/tasks/basic_material_app__size.dart

@@ -4,9 +4,11 @@
 
 import 'dart:async';
 
-import 'package:flutter_devicelab/tasks/size_tests.dart';
+import 'package:flutter_devicelab/framework/adb.dart';
 import 'package:flutter_devicelab/framework/framework.dart';
+import 'package:flutter_devicelab/tasks/size_tests.dart';
 
 Future<Null> main() async {
+  deviceOperatingSystem = DeviceOperatingSystem.android;
   await task(createBasicMaterialAppSizeTest());
 }

dev/devicelab/bin/tasks/basic_material_app_ios__size.dart

+// Copyright 2016 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 'package:flutter_devicelab/framework/adb.dart';
+import 'package:flutter_devicelab/framework/framework.dart';
+import 'package:flutter_devicelab/tasks/size_tests.dart';
+
+Future<Null> main() async {
+  deviceOperatingSystem = DeviceOperatingSystem.ios;
+  await task(createBasicMaterialAppSizeTest());
+}

dev/devicelab/lib/tasks/size_tests.dart

@@ -7,6 +7,8 @@ import 'dart:io';
 import '../framework/framework.dart';
 import '../framework/utils.dart';
 
+import 'package:flutter_devicelab/framework/adb.dart';
+
 TaskFunction createBasicMaterialAppSizeTest() {
   return () async {
     const String sampleAppName = 'sample_flutter_app';
@@ -15,7 +17,7 @@ TaskFunction createBasicMaterialAppSizeTest() {
     if (await sampleDir.exists())
       rmTree(sampleDir);
 
-    int apkSizeInBytes;
+    int releaseSizeInBytes;
 
     await inDirectory(Directory.systemTemp, () async {
       await flutter('create', options: <String>[sampleAppName]);
@@ -26,13 +28,21 @@ TaskFunction createBasicMaterialAppSizeTest() {
       await inDirectory(sampleDir, () async {
         await flutter('packages', options: <String>['get']);
         await flutter('build', options: <String>['clean']);
-        await flutter('build', options: <String>['apk', '--release']);
-        apkSizeInBytes = await file('${sampleDir.path}/build/app.apk').length();
+
+        if (deviceOperatingSystem == DeviceOperatingSystem.ios) {
+          await flutter('build', options: <String>['ios', '--release']);
+          // IPAs are created manually AFAICT
+          await exec('tar', <String>['-zcf', 'build/app.ipa', 'build/ios/Release-iphoneos/Runner.app/']);
+          releaseSizeInBytes = await file('${sampleDir.path}/build/app.ipa').length();
+        } else {
+          await flutter('build', options: <String>['apk', '--release']);
+          releaseSizeInBytes = await file('${sampleDir.path}/build/app.apk').length();
+        }
       });
     });
 
     return new TaskResult.success(
-        <String, dynamic>{'release_size_in_bytes': apkSizeInBytes},
+        <String, dynamic>{'release_size_in_bytes': releaseSizeInBytes},
         benchmarkScoreKeys: <String>['release_size_in_bytes']);
   };
 }

dev/devicelab/manifest.yaml

@@ -52,7 +52,7 @@ tasks:
 
   basic_material_app__size:
     description: >
-      Measures the APK/IPA sizes of a basic material app.
+      Measures the APK size of a basic material app.
     stage: devicelab
     required_agent_capabilities: ["has-android-device"]
 
@@ -138,10 +138,10 @@ tasks:
     required_agent_capabilities: ["has-ios-device"]
 
   flutter_gallery_ios__start_up:
-    stage: devicelab_ios
-    required_agent_capabilities: ["has-ios-device"]
     description: >
       Measures the startup time of the Flutter Gallery app on iOS.
+    stage: devicelab_ios
+    required_agent_capabilities: ["has-ios-device"]
 
   complex_layout_ios__start_up:
     description: >
@@ -150,8 +150,14 @@ tasks:
     required_agent_capabilities: ["has-ios-device"]
 
   flutter_gallery_ios__transition_perf:
-    stage: devicelab_ios
-    required_agent_capabilities: ["has-ios-device"]
     description: >
       Measures the performance of screen transitions in Flutter Gallery on
       iOS.
+    stage: devicelab_ios
+    required_agent_capabilities: ["has-ios-device"]
+
+  basic_material_app_ios__size:
+    description: >
+      Measures the IPA size of a basic material app.
+    stage: devicelab_ios
+    required_agent_capabilities: ["has-android-device"]