Contributing to Flutter InApp Purchase

October 4, 2025 ยท View on GitHub

Thank you for your interest in contributing! This guide will help you get started with development and submitting your contributions.

Getting Started

1. Clone the Repository

git clone https://github.com/hyochan/flutter_inapp_purchase.git
cd flutter_inapp_purchase

2. Install Dependencies

flutter pub get

Platform-Specific Setup

iOS

  • This plugin uses the OpenIAP Apple native module via CocoaPods. See openiap-versions.json for the current version.
  • After upgrading or cloning, run pod install in your iOS project (e.g., example/ios).
  • Minimum iOS deployment target is 15.0 for StoreKit 2 support.

Android

  • This plugin uses the OpenIAP Google native module. See openiap-versions.json for the current version.
  • The module is automatically fetched from Maven Central during build.

This repo ships with Git hooks under .githooks that auto-format, analyze, and test your changes before committing. Enable them once per clone:

git config core.hooksPath .githooks

After this, committing will:

  • Run flutter pub get
  • Auto-format staged Dart files
  • Verify repo-wide formatting (same as CI)
  • Run flutter analyze (non-blocking by default)
  • Run flutter test

Hook options (env vars):

  • SKIP_PRECOMMIT_TESTS=1 to skip tests
  • PRECOMMIT_TEST_CONCURRENCY=<N> to control concurrency (default 4)
  • PRECOMMIT_FAIL_FAST=0 to disable --fail-fast
  • PRECOMMIT_RUN_ALL_TESTS=0 to only run changed tests
  • ENFORCE_ANALYZE=1 to fail on analyzer warnings

3. Run the Example App

Navigate to the example directory and run the app:

cd example
flutter pub get

# For iOS
flutter run --dart-define=IOS_PRODUCTS="your_product_ids"

# For Android
flutter run --dart-define=ANDROID_PRODUCTS="your_product_ids"

Note: You'll need to configure your app with valid product IDs from your App Store Connect or Google Play Console.

Making Changes

1. Fork the Repository

  1. Go to https://github.com/hyochan/flutter_inapp_purchase

  2. Click the "Fork" button in the top-right corner

  3. Clone your fork locally:

    git clone https://github.com/YOUR_USERNAME/flutter_inapp_purchase.git
cd flutter_inapp_purchase

2. Create a Feature Branch

git checkout -b feature/your-feature-name

3. Make Your Changes

  • Write your code following the project conventions
  • Add tests for new functionality
  • Update documentation as needed

4. Test Your Changes

# Format your code
dart format .

# Run tests
flutter test

# Run the example app to verify functionality
cd example
flutter run

Android: Use local openiap-google for debugging (optional)

By default, this plugin depends on the published artifact:

implementation "io.github.hyochan.openiap:openiap-google:1.1.12"

If you need to debug against a local checkout of the OpenIAP Android module:

  1. Clone the module

    git clone https://github.com/hyodotdev/openiap-google

  2. Point Gradle to the local module (uncomment/edit paths)

    Edit android/settings.gradle and uncomment the lines, updating the path:

    include ':openiap'
project(':openiap').projectDir = new File('/Users/you/path/to/openiap-google/openiap')

  3. Switch the dependency for debug builds

    Edit android/build.gradle dependencies to use the local project in debug only:

    // implementation "io.github.hyochan.openiap:openiap-google:1.1.12"
debugImplementation project(":openiap")
releaseImplementation "io.github.hyochan.openiap:openiap-google:1.1.12"

  4. Sync and run

    Run a Gradle sync from Android Studio or rebuild the Flutter module.

    To revert, comment out the include lines in settings.gradle and restore the single implementation "io.github.hyochan.openiap:openiap-google:1.1.12" line in android/build.gradle.

5. Commit Your Changes

git add .
git commit -m "feat: add your feature description"

Follow conventional commit messages:

  • feat: for new features
  • fix: for bug fixes
  • docs: for documentation changes
  • refactor: for code refactoring
  • test: for test additions/changes
  • chore: for maintenance tasks

6. Push to Your Fork

git push origin feature/your-feature-name

7. Create a Pull Request

  1. Go to your fork on GitHub
  2. Click "Pull request" button
  3. Select your branch and target main branch of the original repository
  4. Fill in the PR template with:
    • Description of changes
    • Related issue number (if applicable)
    • Testing performed
  5. Submit the pull request

Development Guidelines

Coding Standards

Please refer to CLAUDE.md for:

  • Naming conventions
  • Platform-specific guidelines
  • API method naming
  • OpenIAP specification compliance

Before Submitting

  • Code is formatted with dart format .
  • All tests pass with flutter test
  • Example app runs without errors
  • Documentation is updated if needed
  • Commit messages follow conventional format

Questions or Issues?

Thank you for contributing!