feat(shorebird_cli): recognize flavors in Flutter modules (#569)

packages/shorebird_cli/lib/src/shorebird_flavor_mixin.dart

@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:collection/collection.dart';
 import 'package:path/path.dart' as p;
 import 'package:platform/platform.dart';
@@ -12,13 +14,24 @@ mixin ShorebirdFlavorMixin on ShorebirdJavaMixin {
     String appRoot, {
     Platform platform = const LocalPlatform(),
   }) async {
+    // Flutter apps have android files in root/android
+    // Flutter modules have android files in root/.android
+    final androidRoot = [
+      Directory(p.join(appRoot, 'android')),
+      Directory(p.join(appRoot, '.android')),
+    ].firstWhereOrNull((dir) => dir.existsSync());
+
+    if (androidRoot == null) {
+      return {};
+    }
+
     final executable = platform.isWindows ? 'gradlew.bat' : 'gradlew';
     final javaHome = getJavaHome(platform);
     final result = await process.run(
-      p.join(appRoot, 'android', executable),
+      p.join(androidRoot.path, executable),
       ['app:tasks', '--all', '--console=auto'],
       runInShell: true,
-      workingDirectory: p.join(appRoot, 'android'),
+      workingDirectory: androidRoot.path,
       environment: {
         if (javaHome != null) 'JAVA_HOME': javaHome,
       },

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

@@ -53,6 +53,18 @@ environment:
     late Progress progress;
     late InitCommand command;
 
+    Directory setUpAppTempDir() {
+      final tempDir = Directory.systemTemp.createTempSync();
+      Directory(p.join(tempDir.path, 'android')).createSync(recursive: true);
+      return tempDir;
+    }
+
+    Directory setUpModuleTempDir() {
+      final tempDir = Directory.systemTemp.createTempSync();
+      Directory(p.join(tempDir.path, '.android')).createSync(recursive: true);
+      return tempDir;
+    }
+
     setUp(() {
       httpClient = _MockHttpClient();
       argResults = _MockArgResults();
@@ -108,7 +120,7 @@ environment:
         when(() => platform.isLinux).thenReturn(true);
         when(() => platform.isMacOS).thenReturn(false);
         when(() => platform.isWindows).thenReturn(false);
-        final tempDir = Directory.systemTemp.createTempSync();
+        final tempDir = setUpAppTempDir();
         const javaHome = 'test_java_home';
         when(() => platform.environment).thenReturn({'JAVA_HOME': javaHome});
         await expectLater(
@@ -125,12 +137,13 @@ environment:
           ),
         ).called(1);
       });
+
       test('uses correct executable on windows', () async {
         final platform = _MockPlatform();
         when(() => platform.isWindows).thenReturn(true);
         when(() => platform.isMacOS).thenReturn(false);
         when(() => platform.isLinux).thenReturn(false);
-        final tempDir = Directory.systemTemp.createTempSync();
+        final tempDir = setUpAppTempDir();
         when(() => platform.environment).thenReturn({
           'PROGRAMFILES': tempDir.path,
           'PROGRAMFILES(X86)': tempDir.path,
@@ -163,7 +176,7 @@ environment:
         when(() => platform.isWindows).thenReturn(false);
         when(() => platform.isMacOS).thenReturn(true);
         when(() => platform.isLinux).thenReturn(false);
-        final tempDir = Directory.systemTemp.createTempSync();
+        final tempDir = setUpAppTempDir();
         when(() => platform.environment).thenReturn({'HOME': tempDir.path});
         final androidStudioDir = Directory(
           p.join(
@@ -199,7 +212,7 @@ environment:
         when(() => platform.isWindows).thenReturn(false);
         when(() => platform.isMacOS).thenReturn(false);
         when(() => platform.isLinux).thenReturn(true);
-        final tempDir = Directory.systemTemp.createTempSync();
+        final tempDir = setUpAppTempDir();
         when(() => platform.environment).thenReturn({'HOME': tempDir.path});
         final androidStudioDir = Directory(
           p.join(tempDir.path, '.AndroidStudio'),
@@ -223,6 +236,29 @@ environment:
           ),
         ).called(1);
       });
+
+      test('extracts flavors from module directory structure', () async {
+        final platform = _MockPlatform();
+        when(() => platform.isLinux).thenReturn(true);
+        when(() => platform.isMacOS).thenReturn(false);
+        when(() => platform.isWindows).thenReturn(false);
+        final tempDir = setUpModuleTempDir();
+        const javaHome = 'test_java_home';
+        when(() => platform.environment).thenReturn({'JAVA_HOME': javaHome});
+        await expectLater(
+          command.extractProductFlavors(tempDir.path, platform: platform),
+          completes,
+        );
+        verify(
+          () => process.run(
+            p.join(tempDir.path, '.android', 'gradlew'),
+            ['app:tasks', '--all', '--console=auto'],
+            runInShell: true,
+            workingDirectory: p.join(tempDir.path, '.android'),
+            environment: {'JAVA_HOME': javaHome},
+          ),
+        ).called(1);
+      });
     });
 
     test('returns no user error when not logged in', () async {
@@ -314,7 +350,7 @@ If you want to reinitialize Shorebird, please run "shorebird init --force".''',
       when(() => result.exitCode).thenReturn(1);
       when(() => result.stdout).thenReturn('error');
       when(() => result.stderr).thenReturn('oops');
-      final tempDir = Directory.systemTemp.createTempSync();
+      final tempDir = setUpAppTempDir();
       File(
         p.join(tempDir.path, 'pubspec.yaml'),
       ).writeAsStringSync(pubspecYamlContent);
@@ -389,7 +425,7 @@ If you want to reinitialize Shorebird, please run "shorebird init --force".''',
           p.join('test', 'fixtures', 'gradle_app_tasks.txt'),
         ).readAsStringSync(),
       );
-      final tempDir = Directory.systemTemp.createTempSync();
+      final tempDir = setUpAppTempDir();
       File(
         p.join(tempDir.path, 'pubspec.yaml'),
       ).writeAsStringSync(pubspecYamlContent);