Feat #575 - Add fvm flavor command (#736)

* Feat #575: Spwan on a flavor - This commit include the new command fvm flavor to execute this action.

* Feat #575 : Update two pages from the docs with the new command - Basic Commands and Flavors

docs/pages/documentation/guides/basic-commands.mdx

@@ -329,3 +329,35 @@ To destroy the FVM cache and delete all cached Flutter SDK versions, simply run:
 ```bash
 fvm destroy
 ```
+
+## Flavor
+
+The `flavor` command is used to execute Flutter commands using a specific Flutter SDK version defined by a project flavor.
+
+This command is particularly useful when you need to run a Flutter command (such as flutter build) with a version of the SDK associated with a particular flavor of your project.
+
+### Usage
+
+```bash
+> fvm flavor [flavor] [flutter_command] [flutter_command_args]
+```
+
+`[flavor]`: The flavor of your project which defines the Flutter SDK version you want to use for running the command.
+
+`[flutter_command]`: The Flutter command you want to execute.
+
+`[flutter_command_args]`: Any additional arguments you want to pass to the Flutter command.
+
+### Examples
+**Running a Build with a Specific Flavor**:
+To build your Flutter project using the Flutter SDK version associated with the `development` flavor:
+
+```bash
+> fvm flavor development flutter build
+```
+**Running Tests with a Different Flavor**:
+If you need to run tests using the Flutter SDK version associated with the `staging` flavor:
+
+```bash
+> fvm flavor staging flutter test
+```

docs/pages/documentation/guides/project-flavors.md

@@ -38,4 +38,12 @@ Will get the version configured for the flavor and set as the project version.
 fvm use {flavor_name}
 ```
 
+## Spwan a command with a flavor version
+
+Will get the version configured for the flavor and use to run a Flutter command.
+
+```bash
+fvm flavor {flavor_name} {flutter_command} {flutter_command_args}
+```
+
 

lib/src/commands/flavor_command.dart

@@ -0,0 +1,66 @@
+import 'package:args/args.dart';
+import 'package:args/command_runner.dart';
+
+import '../services/logger_service.dart';
+import '../services/project_service.dart';
+import '../utils/commands.dart';
+import '../workflows/ensure_cache.workflow.dart';
+import 'base_command.dart';
+
+/// Executes a Flutter command using a specified version defined by the project flavor
+class FlavorCommand extends BaseCommand {
+  @override
+  final name = 'flavor';
+  @override
+  final description =
+      'Executes a Flutter command using a specified version defined by the project flavor';
+  @override
+  final argParser = ArgParser.allowAnything();
+  @override
+  String get invocation => 'fvm flavor {flavor}';
+
+  /// Constructor
+  FlavorCommand();
+
+  @override
+  Future<int> run() async {
+    if (argResults!.rest.isEmpty) {
+      throw UsageException(
+        'A flavor must be specified to execute the Flutter command',
+        usage,
+      );
+    }
+
+    final project = ProjectService.fromContext.findAncestor();
+
+    final flavor = argResults!.rest[0];
+
+    if (!project.flavors.containsKey(flavor)) {
+      throw UsageException(
+        'The specified flavor is not defined in the project configuration file',
+        usage,
+      );
+    }
+
+    final version = project.flavors[flavor];
+    if (version != null) {
+      // Removes flavor from first arg
+      final flutterArgs = [...?argResults?.rest]..removeAt(0);
+
+      // Will install version if not already instaled
+      final cacheVersion = await ensureCacheWorkflow(version);
+      // Runs flutter command with pinned version
+      logger
+          .info('Using Flutter version "$version" for the "$flavor" flavor...');
+
+      final results = await runFlutter(flutterArgs, version: cacheVersion);
+
+      return results.exitCode;
+    } else {
+      throw UsageException(
+        'A version must be specified for the flavor "$flavor" in the project configuration file to execute the Flutter command',
+        usage,
+      );
+    }
+  }
+}

lib/src/runner.dart

@@ -14,6 +14,7 @@ import 'commands/dart_command.dart';
 import 'commands/destroy_command.dart';
 import 'commands/doctor_command.dart';
 import 'commands/exec_command.dart';
+import 'commands/flavor_command.dart';
 import 'commands/flutter_command.dart';
 import 'commands/global_command.dart';
 import 'commands/install_command.dart';
@@ -60,6 +61,7 @@ class FvmCommandRunner extends CompletionCommandRunner<int> {
     addCommand(DestroyCommand());
     addCommand(APICommand());
     addCommand(GlobalCommand());
+    addCommand(FlavorCommand());
   }
 
   /// Checks if the current version (set by the build runner on the