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Monorepo Setup Guide

This guide will help you set up the WebdriverIO Desktop & Mobile monorepo for development.

Prerequisites

Before you begin, ensure you have the following installed:

  • Node.js: Version 18 LTS or 20 LTS

    node --version  # Should be v18.x or v20.x

  • pnpm: Version 10.27.0 or higher

    npm install -g pnpm
pnpm --version  # Should be 10.27.0+

  • Git: For version control

    git --version

Initial Setup

1. Clone the Repository

git clone https://github.com/webdriverio/desktop-mobile.git
cd desktop-mobile

2. Install Dependencies

pnpm install

This will:

  • Install all root-level dependencies
  • Install dependencies for all packages
  • Link workspace packages together
  • Set up Git hooks with Husky

3. Build All Packages

pnpm turbo build

This builds all packages in the correct dependency order using Turborepo's intelligent caching.

4. Run Tests

pnpm test

This runs tests for all packages and ensures everything is working correctly.

Development Workflow

Building Packages

# Build all packages
pnpm turbo build

# Build a specific package
pnpm --filter @wdio/electron-service build
pnpm --filter @wdio/tauri-service build

# Clean and rebuild
pnpm clean
pnpm turbo build

Running Tests

# Run all tests
pnpm test

# Run tests with coverage
pnpm test:coverage

# Run tests for specific package
pnpm --filter @wdio/electron-service test

# Run tests in watch mode
pnpm --filter @wdio/electron-service vitest

Code Quality

# Lint all packages
pnpm lint

# Lint and auto-fix
pnpm lint:fix

# Format code
pnpm format

# Type check all packages
pnpm typecheck

Development Mode

# Watch mode for all packages
pnpm dev

# Watch mode for specific package
pnpm --filter wdio-electron-service dev

Monorepo Structure

desktop-mobile/
├── .github/
│   └── workflows/          # CI/CD workflows
├── packages/               # All packages
│   ├── electron-service/       # Electron WDIO service
│   ├── tauri-service/          # Tauri WDIO service
│   ├── tauri-plugin/           # Tauri v2 plugin (Rust + JS)
│   ├── electron-cdp-bridge/    # Chrome DevTools Protocol bridge
│   ├── native-utils/           # Cross-platform utilities
│   ├── native-types/           # Shared TypeScript type definitions
│   ├── native-spy/             # Spy utilities for mocking
│   └── bundler/                # Build tooling
├── fixtures/              # Test fixtures and example apps
│   ├── e2e-apps/         # E2E test applications
│   │   └── tauri/        # Tauri E2E app
│   └── package-tests/     # Package test fixtures
│       └── tauri-app/     # Tauri package test app
├── examples/              # Example applications
├── e2e/                  # E2E test scenarios
├── docs/                 # Documentation
├── scripts/              # Build and utility scripts
├── types/                # Shared type definitions
├── package.json          # Root package.json
├── pnpm-workspace.yaml   # Workspace configuration
├── turbo.json           # Turborepo configuration
├── tsconfig.base.json   # Base TypeScript config
└── vitest.config.ts     # Vitest configuration

Working with Packages

Adding a New Package

See package-structure.md for detailed guidelines.

Quick steps:

  1. Create package directory: packages/my-package/
  2. Copy structure from packages/electron-service/
  3. Update package.json with your package details
  4. Implement your code in src/
  5. Add tests in test/
  6. Build: pnpm --filter @wdio/my-package build (use the name from package.json)
  7. Test: pnpm --filter @wdio/my-package test

Adding Dependencies

# Add dependency to specific package
pnpm --filter @wdio/electron-service add some-package

# Add dev dependency
pnpm --filter @wdio/electron-service add -D some-dev-package

# Add workspace dependency
pnpm --filter @wdio/electron-service add @wdio/native-utils@workspace:*

Using the Catalog

Common dependencies are managed through pnpm's catalog feature in pnpm-workspace.yaml.

To use a catalog dependency:

{
  "devDependencies": {
    "typescript": "catalog:default",
    "vitest": "catalog:default"
  }
}

Turborepo Caching

Turborepo caches task outputs to speed up subsequent runs.

Local Cache

The local cache is stored in .turbo/ and is automatically used.

Cache Management

# Clear Turborepo cache
pnpm clean:cache

# Force rebuild (bypass cache)
pnpm turbo build --force

Common Tasks

Clean Everything

# Clean all build artifacts and caches
pnpm clean

# Clean just the Turbo cache
pnpm clean:cache

Run CI Locally

# Run the same checks as CI
pnpm lint
pnpm typecheck
pnpm test
pnpm turbo build

Update Dependencies

# Update all dependencies
pnpm update -r -i --latest

# Update specific package
pnpm --filter @wdio/electron-service update some-package

Troubleshooting

"Cannot find module" errors

Try cleaning and reinstalling:

pnpm clean
pnpm install
pnpm turbo build

TypeScript errors after adding dependencies

Rebuild the project:

pnpm turbo build --force

Test failures

Make sure packages are built:

pnpm turbo build
pnpm test

Pre-commit hooks not running

Reinstall Husky:

pnpm prepare

IDE Setup

VS Code

Recommended extensions:

  • ESLint: Microsoft ESLint extension
  • Biome: Biome formatter
  • TypeScript and JavaScript Language Features: Built-in

Workspace settings (.vscode/settings.json):

{
  "editor.formatOnSave": true,
  "editor.defaultFormatter": "biomejs.biome",
  "editor.codeActionsOnSave": {
    "source.fixAll.eslint": true,
    "source.organizeImports": true
  }
}

Platform-Specific Setup

Tauri Development

For working with Tauri packages and plugins:

  1. Install Rust (if not already installed):

    curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

  2. Install Tauri CLI:

    cargo install tauri-cli
# or
npm install -g @tauri-apps/cli

  3. Build Tauri Plugin:

    cd packages/tauri-plugin
cargo build

  4. Build Tauri Test Apps:

    cd fixtures/e2e-apps/tauri
pnpm tauri build

See the Tauri Plugin README for detailed setup instructions.

Next Steps

  • Read package-structure.md for package conventions
  • Read CONTRIBUTING.md for contribution guidelines
  • Read AGENTS.md for AI assistant context and coding standards
  • Explore the Electron service implementation in packages/electron-service/
  • Explore the Tauri service implementation in packages/tauri-service/
  • See Tauri Plugin README for Tauri plugin setup

AI-Assisted Development

This project uses Agent OS for AI-assisted development. The AGENTS.md file contains context for AI tools like Claude Code, Cursor, and others.

Available slash commands (Claude Code):

  • /discover-standards - Extract patterns from the codebase into documented standards
  • /inject-standards - Inject standards into context for consistent AI assistance
  • /shape-spec - Enhanced spec shaping with standards awareness

Getting Help