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Dart contracts client generator for a CQRS API.

contracts_generator #

Dart contracts client generator for a CQRS API. Generated code is based on the format described in

Prerequisites #

You will need to have .NET 6 and the .NET version used in your project installed on your system and have dotnet available in your PATH.

M1 macs #

When installing multiple .NET sdks you need to make sure all of them are for the same architecture. Unfortunately since .NET 6 is the first .NET version to include native arm64 macOS builds, you will be forced to install the x64 version regardless:

# tap into repo that hosts mutually compatible dotnet casks
brew tap isen-ng/dotnet-sdk-versions
# force x64 .NET6
arch -x86_64 brew install dotnet-sdk6-0-100
# install your needed version (see
brew install --cask dotnet-sdk5-0-400

Finally, add the x64 dotnet to your PATH: /usr/local/share/dotnet/x64

Installation #

dart pub add contracts_generator --dev

Then install dependencies needed by generated contracts:

dart pub add cqrs
dart pub add equatable
dart pub add json_annotation

Usage #

First run will take longer due to the need to download external dependencies.


First initialize a config file filled with defaults with dart run contracts_generator init, then generate client contracts code with dart run contracts_generator.

$ dart run contracts_generator --help
Command line utility for generating dart CQRS contracts

Usage: contracts_generator <command> [arguments]

Global options:
-h, --help    Print this usage information.

Available commands:
  init   Initialize a config file

Run "contracts_generator help <command>" for more information about a command.

Library #

import 'dart:io';

import 'package:contracts_generator/contracts_generator.dart';

Future<void> main(List<String> arguments) async {
  final generator = ContractsGenerator(
      input: GeneratorScript.path(['ExampleContracts/**']),
      name: 'cool_name',
      output: Directory('lib'),
      extra: '// :)',
      include: RegExp(r'\w+(\.\w+)*'),

  await generator.writeAll();