feat(shorebird_cli): shorebird release supports flavors (#442)

packages/shorebird_cli/lib/src/commands/release_command.dart

@@ -6,6 +6,7 @@ import 'package:mason_logger/mason_logger.dart';
 import 'package:path/path.dart' as p;
 import 'package:shorebird_cli/src/auth_logger_mixin.dart';
 import 'package:shorebird_cli/src/command.dart';
+import 'package:shorebird_cli/src/config/shorebird_yaml.dart';
 import 'package:shorebird_cli/src/shorebird_build_mixin.dart';
 import 'package:shorebird_cli/src/shorebird_config_mixin.dart';
 import 'package:shorebird_cli/src/shorebird_create_app_mixin.dart';
@@ -43,6 +44,15 @@ class ReleaseCommand extends ShorebirdCommand
         allowed: ['android'],
         allowedHelp: {'android': 'The Android platform.'},
         defaultsTo: 'android',
+      )
+      ..addOption(
+        'target',
+        abbr: 't',
+        help: 'The main entrypoint file of the application.',
+      )
+      ..addOption(
+        'flavor',
+        help: 'The product flavor to use when building the app.',
       );
   }
 
@@ -74,9 +84,11 @@ make smaller updates to your app.
 
     await logValidationIssues();
 
+    final flavor = results['flavor'] as String?;
+    final target = results['target'] as String?;
     final buildProgress = logger.progress('Building release');
     try {
-      await buildAppBundle();
+      await buildAppBundle(flavor: flavor, target: target);
       buildProgress.complete();
     } on ProcessException catch (error) {
       buildProgress.fail('Failed to build: ${error.message}');
@@ -104,7 +116,7 @@ make smaller updates to your app.
       return ExitCode.software.code;
     }
 
-    final appId = shorebirdYaml.appId;
+    final appId = shorebirdYaml.getAppId(flavor: flavor);
     final app = apps.firstWhereOrNull((a) => a.id == appId);
     if (app == null) {
       logger.err(
@@ -196,7 +208,7 @@ ${styleBold.wrap(lightGreen.wrap('🚀 Ready to create a new release!'))}
         'app',
         'intermediates',
         'stripped_native_libs',
-        'release',
+        flavor != null ? '${flavor}Release' : 'release',
         'out',
         'lib',
         archMetadata.path,
@@ -221,12 +233,16 @@ ${styleBold.wrap(lightGreen.wrap('🚀 Ready to create a new release!'))}
 
     createArtifactProgress.complete();
 
+    final bundlePath = flavor != null
+        ? './build/app/outputs/bundle/${flavor}Release/app-$flavor-release.aab'
+        : './build/app/outputs/bundle/release/app-release.aab';
+
     logger
       ..success('\n✅ Published Release!')
       ..info('''
 
 Your next step is to upload the app bundle to the Play Store.
-${lightCyan.wrap("./build/app/outputs/bundle/release/app-release.aab")}
+${lightCyan.wrap(bundlePath)}
 
 See the following link for more information:    
 ${link(uri: Uri.parse('https://support.google.com/googleplay/android-developer/answer/9859152?hl=en'))}

packages/shorebird_cli/lib/src/config/shorebird_yaml.dart

@@ -39,3 +39,10 @@ class ShorebirdYaml {
   /// The base url used to check for updates.
   final String? baseUrl;
 }
+
+extension AppIdExtension on ShorebirdYaml {
+  String getAppId({String? flavor}) {
+    if (flavor == null || flavors == null) return appId;
+    return flavors![flavor] ?? appId;
+  }
+}

packages/shorebird_cli/test/src/commands/release_command_test.dart

@@ -89,7 +89,7 @@ flutter:
       return tempDir;
     }
 
-    void setUpTempArtifacts(Directory dir) {
+    void setUpTempArtifacts(Directory dir, {String? flavor}) {
       for (final archMetadata
           in ShorebirdBuildMixin.allAndroidArchitectures.values) {
         final artifactPath = p.join(
@@ -98,7 +98,7 @@ flutter:
           'app',
           'intermediates',
           'stripped_native_libs',
-          'release',
+          flavor != null ? '${flavor}Release' : 'release',
           'out',
           'lib',
           archMetadata.path,
@@ -426,6 +426,30 @@ Did you forget to run "shorebird init"?''',
       expect(capturedHostedUri, isNull);
     });
 
+    test(
+        'succeeds when release is successful '
+        'with flavors and target', () async {
+      const flavor = 'development';
+      const target = './lib/main_development.dart';
+      when(() => argResults['flavor']).thenReturn(flavor);
+      when(() => argResults['target']).thenReturn(target);
+      final tempDir = setUpTempDir();
+      File(
+        p.join(tempDir.path, 'shorebird.yaml'),
+      ).writeAsStringSync('''
+app_id: productionAppId
+flavors:
+  development: $appId''');
+      setUpTempArtifacts(tempDir, flavor: flavor);
+      final exitCode = await IOOverrides.runZoned(
+        command.run,
+        getCurrentDirectory: () => tempDir,
+      );
+      verify(() => logger.success('\n✅ Published Release!')).called(1);
+      expect(exitCode, ExitCode.success.code);
+      expect(capturedHostedUri, isNull);
+    });
+
     test('prints flutter validation warnings', () async {
       when(() => flutterValidator.validate(any())).thenAnswer(
         (_) async => [