React Native Device Runner

Automatically detects connected physical devices and runs your React Native or Expo app with a single command. Works seamlessly with both Expo and React Native CLI projects.

📋 Requirements

iOS

• Xcode 15+ (recommended)
• Connected iOS device (Developer Mode enabled)
• Device trusted in Xcode

Android

• Android SDK installed
• adb command available
• USB debugging enabled on device

Common

• Node.js & npm or pnpm
• For Expo projects: Expo SDK installed
• For React Native CLI projects: React Native CLI installed
• jq (optional, for advanced JSON parsing)

🚀 Installation & Usage

Method 1: Run directly with npx (Recommended)

# Auto-detect (iOS preferred)
npx react-native-device-runner

# Prefer Android
npx react-native-device-runner --prefer android

# Prefer iOS
npx react-native-device-runner --prefer ios

# Help
npx react-native-device-runner --help

# Version
npx react-native-device-runner --version

Method 2: Global Install

npm install -g react-native-device-runner

# Usage after install
rn-device
# or
rndr
# or
react-native-device-runner

⚙️ Configuration

You can configure build options using one of the following methods:

Note: The tool automatically uses Debug for iOS configuration and debug for Android variant - these values are hardcoded and don't need to be configured.

1. app.json extra section (Expo projects)

{
  "expo": {
    "extra": {
      "IOS_SCHEME": "myapp",
      "IOS_BUNDLE_ID": "com.mycompany.myapp",
      "AOS_APP_ID": "com.mycompany.myapp"
    }
  }
}

2. .env file

IOS_SCHEME=myapp
IOS_BUNDLE_ID=com.mycompany.myapp
AOS_APP_ID=com.mycompany.myapp

3. Environment variables

export IOS_SCHEME="myapp"
export IOS_BUNDLE_ID="com.mycompany.myapp"
npx react-native-device-runner

4. Force project type

If automatic detection fails or you need to override:

# Force Expo mode
export FORCE_PROJECT_TYPE="expo"
npx react-native-device-runner

# Force React Native CLI mode
export FORCE_PROJECT_TYPE="react-native-cli"
npx react-native-device-runner

🎯 Example Usage

$ npx react-native-device-runner

┌─────────────────────────────────────────────────────────────────────────────┐
│                🚀 React Native Device Runner                          │
│              Auto Device Detection & Runner Script                         │
└─────────────────────────────────────────────────────────────────────────────┘

## 📝 Configuration Variables

| Variable            | Description             | Default      | Example                 |
| ------------------- | ----------------------- | ------------ | ----------------------- |
| `IOS_SCHEME`        | iOS build scheme        | -            | `myapp`                 |
| `IOS_BUNDLE_ID`     | iOS bundle ID           | -            | `com.mycompany.myapp`   |
| `IOS_WORKSPACE`     | iOS workspace path      | -            | `ios/MyApp.xcworkspace` |
| `IOS_DERIVED_DATA`  | iOS build data path     | `.build/ios` | `.build/ios`            |
| `AOS_APP_ID`        | Android app ID          | -            | `com.mycompany.myapp`   |
| `AOS_MODULE`        | Android module name     | `app`        | `app`                   |

> **Note:** The tool automatically uses `Debug` for iOS configuration and `debug` for Android variant. These values are hardcoded and don't need to be configured.

## Project Type Detection

React Native Device Runner automatically detects whether your project is using Expo or React Native CLI based on several factors:

1. **Package Dependencies**: Checks if `expo` is listed in your package.json dependencies
2. **Configuration Files**: Looks for Expo-specific files like app.json with an expo section
3. **Directory Structure**: Checks for the presence of ios/ and android/ folders
4. **Command Availability**: Verifies that the necessary CLI tools are installed

The tool will optimize the build and run commands based on the detected project type. If automatic detection fails, it defaults to React Native CLI mode.

## 🚫 Troubleshooting

### Metro/Expo compatibility errors

If you encounter errors related to Metro bundler or Expo CLI internals like:

- `Package subpath './src/lib/TerminalReporter' is not defined by 'exports'`
- `Cannot find module 'metro/src/lib/TerminalReporter'`

Try one of these solutions:

1. Force React Native CLI mode:

```bash
export FORCE_PROJECT_TYPE="react-native-cli"
npx react-native-device-runner

2. Run with the --no-bundler option (for Expo projects):

npx expo run:ios --device YOUR_DEVICE_ID --no-bundler
npx expo run:android --device YOUR_DEVICE_ID --no-bundler

3. Update your Metro and Expo dependencies to compatible versions:

npx expo install metro metro-resolver

Note: The tool automatically uses Debug build configuration for iOS and debug variant for Android - you don't need to specify these values.

iOS device not detected

• Check device trust settings in Xcode
• Make sure the device is trusted
• Check device status in Xcode > Window > Devices and Simulators

Android device not detected

• Make sure USB debugging is enabled
• Check device connection with adb devices
• Try a different USB cable or port

Expo/React Native config not loading

• Test with npx expo config --json (for Expo)
• Make sure your config files are valid JSON
• Install jq if needed: brew install jq (macOS) or apt install jq (Ubuntu)

📄 License

This project is licensed under the MIT License. See LICENSE for details.

• Expo
• React Native