feat: adding gradlew version to the doctor output

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

@@ -73,6 +73,12 @@ Engine • revision ${shorebirdEnv.shorebirdEngineRevision}''',
               .join('${Platform.lineTerminator}                  ');
         }
       }
+
+      String? gradlewVersion;
+      if (gradlew.exists(Directory.current.path)) {
+        gradlewVersion = await gradlew.version(Directory.current.path);
+      }
+
       output.writeln('''
 
 Logs: ${shorebirdEnv.logsDirectory.path}
@@ -82,7 +88,8 @@ Android Toolchain
   • ADB: ${androidSdk.adbPath ?? notDetected}
   • JAVA_HOME: ${java.home ?? notDetected}
   • JAVA_EXECUTABLE: ${javaExe ?? notDetected}
-  • JAVA_VERSION: $javaVersion''');
+  • JAVA_VERSION: $javaVersion
+  • Gradle: ${gradlewVersion ?? notDetected}''');
     }
 
     logger.info(output.toString());

packages/shorebird_cli/lib/src/executables/gradlew.dart

@@ -58,9 +58,7 @@ Gradlew get gradlew => read(gradlewRef);
 class Gradlew {
   String get executable => platform.isWindows ? 'gradlew.bat' : 'gradlew';
 
-  /// Return the set of product flavors configured for the app at [projectPath].
-  /// Returns an empty set for apps that do not use product flavors.
-  Future<Set<String>> productFlavors(String projectPath) async {
+  Future<ShorebirdProcessResult> _run(List<String> args, String projectPath) {
     final javaHome = java.home;
     final androidRoot = Directory(p.join(projectPath, 'android'));
 
@@ -75,15 +73,40 @@ class Gradlew {
     }
 
     final executablePath = executableFile.path;
-    final result = await process.run(
+    return process.run(
       executablePath,
-      ['app:tasks', '--all', '--console=auto'],
+      args,
       runInShell: true,
       workingDirectory: p.dirname(executablePath),
       environment: {
         if (!javaHome.isNullOrEmpty) 'JAVA_HOME': javaHome!,
       },
     );
+  }
+
+  /// Returns whether the gradle wrapper exists at [projectPath].
+  bool exists(String projectPath) {
+    final androidRoot = Directory(p.join(projectPath, 'android'));
+    return File(p.join(androidRoot.path, executable)).existsSync();
+  }
+
+  /// Return the version of the gradle wrapper at [projectPath].
+  Future<String> version(String projectPath) async {
+    final result = await _run(['--version'], projectPath);
+
+    final versionPattern = RegExp(r'Gradle (\d+\.\d+\.\d+)');
+    final match = versionPattern.firstMatch(result.stdout.toString());
+
+    return match?.group(1) ?? 'unknown';
+  }
+
+  /// Return the set of product flavors configured for the app at [projectPath].
+  /// Returns an empty set for apps that do not use product flavors.
+  Future<Set<String>> productFlavors(String projectPath) async {
+    final result = await _run(
+      ['app:tasks', '--all', '--console=auto'],
+      projectPath,
+    );
 
     if (result.exitCode != 0) {
       throw Exception('${result.stdout}\n${result.stderr}');

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

@@ -28,6 +28,7 @@ void main() {
     late AndroidSdk androidSdk;
     late Directory logsDirectory;
     late Doctor doctor;
+    late Gradlew gradlew;
     late Java java;
     late ShorebirdLogger logger;
     late ShorebirdEnv shorebirdEnv;
@@ -42,6 +43,7 @@ void main() {
           androidStudioRef.overrideWith(() => androidStudio),
           androidSdkRef.overrideWith(() => androidSdk),
           doctorRef.overrideWith(() => doctor),
+          gradlewRef.overrideWith(() => gradlew),
           javaRef.overrideWith(() => java),
           loggerRef.overrideWith(() => logger),
           shorebirdEnvRef.overrideWith(() => shorebirdEnv),
@@ -55,6 +57,7 @@ void main() {
       androidStudio = MockAndroidStudio();
       androidSdk = MockAndroidSdk();
       doctor = MockDoctor();
+      gradlew = MockGradlew();
       logsDirectory = Directory.systemTemp.createTempSync('shorebird_logs');
       java = MockJava();
       logger = MockShorebirdLogger();
@@ -67,6 +70,7 @@ void main() {
       when(() => androidStudio.path).thenReturn(null);
       when(() => androidSdk.path).thenReturn(null);
       when(() => androidSdk.adbPath).thenReturn(null);
+      when(() => gradlew.exists(any())).thenReturn(false);
       when(() => java.home).thenReturn(null);
       when(
         () => shorebirdEnv.shorebirdEngineRevision,
@@ -142,6 +146,7 @@ Android Toolchain
   • JAVA_HOME: $notDetectedText
   • JAVA_EXECUTABLE: $notDetectedText
   • JAVA_VERSION: $notDetectedText
+  • Gradle: $notDetectedText
 '''),
         );
       });
@@ -166,6 +171,7 @@ OpenJDK 64-Bit Server VM (build 17.0.9+0-17.0.9b1087.7-11185874, mixed mode)'''
         final msg =
             verify(() => logger.info(captureAny())).captured.first as String;
 
+        final notDetectedText = red.wrap('not detected');
         expect(
           msg.replaceAll(
             Platform.lineTerminator,
@@ -187,10 +193,65 @@ Android Toolchain
   • JAVA_VERSION: openjdk version "17.0.9" 2023-10-17
                   OpenJDK Runtime Environment (build 17.0.9+0-17.0.9b1087.7-11185874)
                   OpenJDK 64-Bit Server VM (build 17.0.9+0-17.0.9b1087.7-11185874, mixed mode)
+  • Gradle: $notDetectedText
 ''',
           ),
         );
       });
+
+      group('when a gradlew executable exists', () {
+        setUp(() {
+          when(() => gradlew.exists(any())).thenReturn(true);
+          when(() => gradlew.version(any())).thenAnswer((_) async => '7.6.3');
+        });
+
+        test('prints the gradle version', () async {
+          when(() => argResults['verbose']).thenReturn(true);
+          when(() => androidStudio.path).thenReturn('test-studio-path');
+          when(() => androidSdk.path).thenReturn('test-sdk-path');
+          when(() => androidSdk.adbPath).thenReturn('test-adb-path');
+          when(() => java.home).thenReturn('test-java-home');
+          when(() => java.executable).thenReturn('test-java-executable');
+
+          when(() => java.version).thenReturn(
+            '''
+openjdk version "17.0.9" 2023-10-17
+OpenJDK Runtime Environment (build 17.0.9+0-17.0.9b1087.7-11185874)
+OpenJDK 64-Bit Server VM (build 17.0.9+0-17.0.9b1087.7-11185874, mixed mode)'''
+                .replaceAll('\n', Platform.lineTerminator),
+          );
+          await runWithOverrides(command.run);
+
+          final msg =
+              verify(() => logger.info(captureAny())).captured.first as String;
+
+          expect(
+            msg.replaceAll(
+              Platform.lineTerminator,
+              '\n',
+            ),
+            equals(
+              '''
+Shorebird $packageVersion • git@github.com:shorebirdtech/shorebird.git
+Flutter • revision ${shorebirdEnv.flutterRevision}
+Engine • revision $shorebirdEngineRevision
+
+Logs: ${logsDirectory.path}
+Android Toolchain
+  • Android Studio: test-studio-path
+  • Android SDK: test-sdk-path
+  • ADB: test-adb-path
+  • JAVA_HOME: test-java-home
+  • JAVA_EXECUTABLE: test-java-executable
+  • JAVA_VERSION: openjdk version "17.0.9" 2023-10-17
+                  OpenJDK Runtime Environment (build 17.0.9+0-17.0.9b1087.7-11185874)
+                  OpenJDK 64-Bit Server VM (build 17.0.9+0-17.0.9b1087.7-11185874, mixed mode)
+  • Gradle: 7.6.3
+''',
+            ),
+          );
+        });
+      });
     });
 
     test('runs validators without applying fixes if no fix flag exists',

packages/shorebird_cli/test/src/executables/gradlew_test.dart

@@ -76,13 +76,13 @@ Make sure you have run "flutter build apk" at least once.''',
       });
     });
 
-    group('productFlavors', () {
-      Directory setUpAppTempDir() {
-        final tempDir = Directory.systemTemp.createTempSync();
-        Directory(p.join(tempDir.path, 'android')).createSync(recursive: true);
-        return tempDir;
-      }
+    Directory setUpAppTempDir() {
+      final tempDir = Directory.systemTemp.createTempSync();
+      Directory(p.join(tempDir.path, 'android')).createSync(recursive: true);
+      return tempDir;
+    }
 
+    group('productFlavors', () {
       test(
           'throws MissingAndroidProjectException '
           'when android root does not exist', () async {
@@ -329,5 +329,101 @@ Make sure you have run "flutter build apk" at least once.''',
         },
       );
     });
+
+    group('exists', () {
+      late Directory tempDir;
+      setUp(() {
+        tempDir = setUpAppTempDir();
+      });
+
+      group('when gradlew does not exist', () {
+        test('returns false', () {
+          expect(gradlew.exists(tempDir.path), isFalse);
+        });
+      });
+
+      group('when gradlew exists', () {
+        group(
+          'when on mac and linux',
+          () {
+            test('returns true', () {
+              File(
+                p.join(tempDir.path, 'android', 'gradlew'),
+              ).createSync(recursive: true);
+              expect(gradlew.exists(tempDir.path), isTrue);
+            });
+          },
+          onPlatform: {'windows': const Skip()},
+        );
+
+        group(
+          'when on windows',
+          () {
+            test('returns true', () {
+              File(
+                p.join(tempDir.path, 'android', 'gradlew.bat'),
+              ).createSync(recursive: true);
+              expect(gradlew.exists(tempDir.path), isTrue);
+            });
+          },
+          onPlatform: {
+            'mac-os': const Skip(),
+            'linux': const Skip(),
+          },
+        );
+      });
+    });
+
+    group('version', () {
+      late Directory tempDir;
+
+      setUp(() {
+        when(() => platform.isLinux).thenReturn(true);
+        when(() => platform.isMacOS).thenReturn(false);
+        when(() => platform.isWindows).thenReturn(false);
+        tempDir = setUpAppTempDir();
+        File(
+          p.join(tempDir.path, 'android', 'gradlew'),
+        ).createSync(recursive: true);
+        const javaHome = 'test_java_home';
+        when(() => platform.environment).thenReturn({'JAVA_HOME': javaHome});
+
+        when(() => result.stdout).thenReturn('''
+
+------------------------------------------------------------
+Gradle 7.6.3
+------------------------------------------------------------
+
+Build time:   2023-10-04 15:59:47 UTC
+Revision:     1694251d59e0d4752d547e1fd5b5020b798a7e71
+
+Kotlin:       1.7.10
+Groovy:       3.0.13
+Ant:          Apache Ant(TM) version 1.10.11 compiled on July 10 2021
+JVM:          11.0.23 (Azul Systems, Inc. 11.0.23+9-LTS)
+OS:           Mac OS X 14.4.1 aarch64
+''');
+      });
+
+      test('returns the correct version', () async {
+        final version = await runWithOverrides(
+          () => gradlew.version(tempDir.path),
+        );
+        expect(version, '7.6.3');
+      });
+
+      group('when the output cannot be parsed', () {
+        setUp(() {
+          when(() => result.stdout).thenReturn('not a real version');
+        });
+
+        test('returns unknown', () async {
+          final version = await runWithOverrides(
+            () => gradlew.version(tempDir.path),
+          );
+          expect(version, 'unknown');
+        });
+      });
+    });
   });
 }