moarch 1.1.8

Flutter CLI — scaffold Clean Architecture projects with Riverpod, FVM and your own conventions.

🧱 moarch

A Flutter CLI tool to scaffold Clean Architecture projects with Riverpod — your conventions, your structure, no code generation required.

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Features

• ⚡ One command setup — moarch init scaffolds your full lib/ structure with routing, theme, security, and shared widgets
• 🎯 Layered feature generation — moarch create feature <n> generates Clean Architecture with an interactive checklist
• ✨ Minimal code generation — build_runner used only for secure .env handling; no freezed or riverpod_annotation boilerplate
• 🧪 Test scaffolding — moarch create feature auto-generates notifier/repository/usecase tests in test/features/<feature>
• 🏗️ Your conventions — Fully customizable templates, pre-configured with proven patterns
• 🔒 Security included — Secure storage integration with flutter_secure_storage
• 📍 Router ready — GoRouter setup out of the box
• 🎨 Reusable widgets — Pre-built button, input, loading, and error view components
• 📦 Environment-aware — .env and .fvmrc generated at project root

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Installation

dart pub global activate moarch

Make sure ~/.pub-cache/bin is in your PATH:

# macOS / Linux — add to .zshrc or .bashrc
export PATH="$PATH:$HOME/.pub-cache/bin"

# Windows — add %APPDATA%\Pub\Cache\bin to your PATH via Environment Variables

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Quick start

# 1. create your Flutter project
flutter create my_app && cd my_app

# 2. add dependencies to pubspec.yaml (see below)
flutter pub get

# 3. remove the generated main.dart
rm lib/main.dart

# 4. scaffold the project structure
moarch init

# 5. create your first feature
moarch create feature auth

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Required dependencies

dependencies:
    flutter:
        sdk: flutter
    flutter_riverpod: ^2.5.1
    envied: ^1.3.3
    dio: ^5.4.3
    go_router: ^14.0.0
    flutter_secure_storage: ^9.2.2

Dev dependencies (for build_runner + envied_generator)

dev_dependencies:
    lints: ^3.0.0
    test: ^1.24.0
    build_runner: ^2.4.0
    envied_generator: ^1.0.0

Envied support (added by moarch init)

When you run moarch init, it scaffolds:

• lib/config/env/app_env.dart with @Envied(... obfuscate: true)
• .env entries: BASE_URL= (auto-generated)
• .gitignore entry .env

In your app, execute codegen:

fvm flutter pub add envied
fvm flutter pub add --dev build_runner envied_generator
dart run build_runner build --delete-conflicting-outputs

Then use AppEnv values safely:

final baseUrl = AppEnv.baseUrl;

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moarch init

Generates a complete, production-ready project structure:

.env                             ← BASE_URL= (generated by moarch init)
.fvmrc                           ← { "flutter": "stable" }
lib/
├── main.dart                    ← App with routing & theme setup
├── core/
│   ├── constants/
│   │   ├── app_constants.dart   ← spacing (4pt), text sizes, touch targets, radii, durations
│   │   └── api_constants.dart   ← API timeout, BASE_URL from .env
│   ├── errors/
│   │   └── app_exception.dart   ← unified error handling
│   ├── network/
│   │   └── dio_client.dart      ← HTTP client with interceptors
│   ├── security/
│   │   └── secure_storage.dart  ← flutter_secure_storage wrapper
│   └── utils/
│       ├── extensions.dart      ← ContextX, StringX, DateTimeX
│       └── logger.dart          ← single log() function
├── config/
│   ├── env/
│   │   └── app_env.dart         ← Envied wrapper for secure .env values
│   ├── router/
│   │   └── app_router.dart      ← GoRouter setup with routes
│   └── theme/
│       └── app_theme.dart       ← Material 3 theme, light/dark modes
├── shared/widgets/
│   ├── buttons/
│   │   └── app_button.dart      ← filled / outlined / text variants
│   ├── inputs/
│   │   └── app_input.dart       ← themed input widget
│   ├── loadings/
│   │   ├── app_loading_data.dart    ← progress indicators for data loading
│   │   └── app_loading_action.dart  ← indicators for actions (submit, delete)
│   └── error_view.dart          ← error display component
└── features/                    ← your features go here

Note on tests

• moarch create feature generates tests in test/features/<feature> for selected layers:
  • ${feature}_notifier_test.dart
  • ${feature}_repository_test.dart
  • ${feature}_usecase_test.dart

Optional test folder for manual setup

test/
└── features/
    └── <feature>/
        ├── <feature>_notifier_test.dart
        ├── <feature>_repository_test.dart
        └── <feature>_usecase_test.dart

What you get:

• ✅ Routing configured with GoRouter
• ✅ Secure storage integration ready
• ✅ DIO client with error handling
• ✅ Theme system with Material 3 support
• ✅ Reusable widgets library (buttons, inputs, loading states, error view)
• ✅ Environment variables (.env) support
• ✅ Envied config scaffolding (lib/config/env/app_env.dart, .env + .gitignore entry)
• ✅ Test scaffolding in test/features/<feature> (notifier/repository/usecase as selected)
• ✅ Extension methods for common operations

moarch create feature

Generates a complete feature with Clean Architecture layers and an interactive checklist.

moarch create feature auth
moarch create feature user_profile
moarch create feature ProductCatalog    # casing doesn't matter
moarch create feature auth --all        # skip checklist, generate all layers

Interactive Checklist

The CLI presents a checklist to select which layers to generate:

  Select layers for "Auth" (space = toggle, enter = confirm):
▶ [✓]  Remote Datasource
  [ ]  Local/Cache Datasource        ← optional, default: off
  [✓]  Repository (interface + impl)
  [ ]  Use Cases                     ← optional, default: off
  [✓]  State + Notifier
  [✓]  View

This lets you generate only what you need — skip local datasources if your feature is API-only, or skip use cases if your logic fits in the notifier.

Generated Structure

lib/features/auth/
├── domain/
│   ├── entities/
│   │   └── auth_entity.dart
│   ├── repositories/
│   │   └── auth_repository.dart     ← interface
│   └── usecases/
│       └── get_auth.dart            ← if selected
├── data/
│   ├── datasources/
│   │   ├── auth_remote_datasource.dart
│   │   └── auth_local_datasource.dart  ← if selected
│   ├── models/
│   │   └── auth_model.dart          ← copyWith, fromJson, toJson
│   └── repositories/
│       └── auth_repository_impl.dart
└── presentation/
    ├── states/
    │   └── auth_state.dart
    ├── notifiers/
    │   └── auth_notifier.dart       ← StateNotifier with error handling
    ├── views/
    │   └── auth_view.dart
    └── widgets/

Generated Test Files

moarch create feature now also generates tests in test/features/<feature>:

• ${feature}_notifier_test.dart — when State + Notifier and Repository are selected
• ${feature}_repository_test.dart — when Repository is selected
• ${feature}_usecase_test.dart — when Use Cases is selected

State Management Pattern

Your state uses a simple, flexible model with copyWith:

class AuthState {
  const AuthState({
    this.isLoadingAction = false,
    this.error,
    this.success,
  });

  final bool isLoadingAction;
  final String? error;
  final String? success;

  AuthState copyWith({
    bool? isLoadingAction,
    String? error,
    String? success,
  }) {
    return AuthState(
      isLoadingAction: isLoadingAction ?? false,
      error: error,
      success: success,
    );
  }
}

Error handling in views uses state.value?.error — your AppException message from the repository, not the AsyncValue error:

ref.listen(authNotifierProvider, (_, next) {
  final value = next.value;
  if (value?.error != null) {
    // show snackbar with value.error
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(content: Text(value!.error!)),
    );
  }
});

Tips

• Remote datasource only? Unselect "Local/Cache Datasource" in the checklist
• No use cases? Skip them if your feature is simple — the repository covers most cases
• Reuse widgets? Put shared feature widgets in shared/widgets/, not in the feature folder
• Models with JSON? The generated model includes fromJson() and toJson()

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Customizing moarch

moarch templates are generated from production-ready code that matches default Flutter best practices. If you want to customize what gets generated, clone the repository and modify the templates:

Template files

File	Generates
core_templates.dart	main.dart, dio_client, secure_storage, constants, errors, utils, extensions, logger
config_templates.dart	app_theme.dart, app_router.dart
shared_templates.dart	app_button, app_input, app_loading_action, app_loading_data, error_view
feature_templates.dart	entity, model, datasources, repository, state, notifier, view

Steps to customize

1. Clone the repository

   git clone https://github.com/SuperMoooo/moarch.git
   cd moarch
   

2. Edit templates in lib/src/templates/

   • Each method returns a string of Dart code
   • Your changes will be inserted as-is into generated files

3. Re-activate locally

   dart pub global activate --source path ./
   

4. Test your changes

   moarch init
   moarch create feature test_feature
   

Pro Tips

• Keep method signatures consistent — users expect certain class names and patterns
• Use triple-quoted strings (r'''...''') to avoid escaping special characters
• Test across different feature names (snake_case, PascalCase, UPPER_CASE)
• If you change core templates, test moarch init first before features
• Pull requests for improvements are welcome!

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Common use cases

Starting fresh

# Quick start with all layers
moarch create feature user --all

API-only feature

# Skip local datasource and use cases, generate only remote
moarch create feature products
# Then unselect "Local/Cache Datasource" and "Use Cases" in the checklist

Feature with offline support

# Select "Local/Cache Datasource" in the checklist
moarch create feature downloads

Add routing to your features

Your app_router.dart is ready for GoRouter routes. Add them under a new screen route:

GoRoute(
  path: '/auth',
  builder: (context, state) => const AuthView(),
),

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Troubleshooting

Command not found: moarch

• Check that ~/.pub-cache/bin (or %APPDATA%\Pub\Cache\bin on Windows) is in your PATH
• Try: dart pub global activate moarch again

Feature already exists

• moarch won't overwrite existing features — delete or rename the folder first

Wrong package imports after init

• All generated files use relative imports for core/config/shared — verify your lib structure matches

Customization not working

• After editing templates, run: dart pub global activate --source path ./
• Make sure you've saved the file and are using the updated version

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License

MIT © André Montoito