# Building Antigravity from Source

This guide explains how to extract, modify, and rebuild the Antigravity IDE from source.

## Prerequisites

- Linux system (Ubuntu/Debian recommended)
- Node.js 18+ with npm
- Git
- Standard build tools
- ~1GB disk space

## Quick Build

If you just want to rebuild the package without modifications:

```bash
# Clone repository
git clone https://github.rommark.dev/admin/antigravity-ai-providers.git
cd antigravity-ai-providers

# Build .deb package
./scripts/build-deb.sh

# Install
sudo dpkg -i packages/antigravity_2.0.1-ai-providers-1_amd64.deb
```

## Detailed Build Process

### Step 1: Extract app.asar

The application code is packaged in `app.asar`. Extract it to modify:

```bash
# Extract app
./scripts/extract-app.sh

# This creates: src/app-extracted/
```

### Step 2: Modify Code

Navigate to extracted files:

```bash
cd src/app-extracted/dist/
```

**Key Files:**

- `services/aiProviderService.js` - AI provider management
- `services/settingsService.js` - Application settings
- `ipcHandlers.js` - IPC communication
- `aiProviderAPI.ts` - TypeScript API wrapper
- `ai-provider-settings.html` - Complete GUI

**Example Modifications:**

#### Add a New Provider Preset

Edit `services/aiProviderService.js`:

```javascript
const PROVIDER_PRESETS = {
  // ... existing presets ...
  
  "My Custom Provider": {
    type: AIProviderType.CUSTOM,
    endpoint: "https://api.myprovider.com/v1",
    models: ["model-1", "model-2"],
    capabilities: [AIProviderCapability.CHAT, AIProviderCapability.STREAMING],
  },
};
```

#### Add New IPC Handler

Edit `ipcHandlers.js`:

```javascript
electron_1.ipcMain.handle('ai:my-new-handler', async (_event, arg) => {
  // Your handler logic
  return result;
});
```

#### Customize GUI

Edit `ai-provider-settings.html`:

```html
<!-- Add your UI changes -->
<div id="my-new-section">
  <h2>My New Feature</h2>
  <!-- ... -->
</div>
```

### Step 3: Repack app.asar

After making changes, repack:

```bash
# Repack
./scripts/repack-app.sh

# This updates: src/app.asar
```

### Step 4: Build Package

Create the .deb package:

```bash
# Build
./scripts/build-deb.sh

# Output: packages/antigravity_2.0.1-ai-providers-1_amd64.deb
```

### Step 5: Install & Test

```bash
# Install
sudo dpkg -i packages/antigravity_2.0.1-ai-providers-1_amd64.deb

# Test
antigravity
```

## Development Workflow

### Watching for Changes

For rapid development:

```bash
# Terminal 1: Extract and watch
./scripts/extract-app.sh
# (Manual repack after changes)

# Terminal 2: Build and install
./scripts/build-deb.sh && sudo dpkg -i packages/*.deb
```

### Debugging

View logs:

```bash
# Electron logs
cat ~/.config/antigravity/logs/*.log

# Language server logs
cat ~/.cache/antigravity/language_server.log
```

Run in debug mode:

```bash
antigravity --enable-logging
```

### Testing Changes

```bash
# Reinstall and test
sudo dpkg -r antigravity
sudo dpkg -i packages/antigravity_2.0.1-ai-providers-1_amd64.deb
antigravity
```

## Troubleshooting

### asar command not found

```bash
npm install -g asar
```

### Build fails

Check dependencies:

```bash
sudo apt-get install build-essential
```

### Installation fails

Fix dependencies:

```bash
sudo dpkg -i antigravity_2.0.1-ai-providers-1_amd64.deb
sudo apt-get install -f
```

### App doesn't start

Check logs:

```bash
journalctl -xe
cat ~/.config/antigravity/logs/*.log
```

## Advanced: Custom Package

### Create Different Architecture

Edit `scripts/build-deb.sh`:

```bash
# For ARM64
ARCH="arm64"
DEB_FILE="antigravity_${VERSION}_arm64.deb"
```

### Add Extra Dependencies

Edit `scripts/build-deb.sh`:

```bash
# Add to Depends field in control file
Depends: ..., my-custom-package
```

### Include Additional Files

```bash
# In build-deb.sh, after copying app files:
cp /path/to/your/file "$TEMP_DIR/opt/antigravity/"
```

## Contributing Changes

1. Fork repository
2. Create branch: `git checkout -b feature/my-feature`
3. Commit changes: `git commit -am 'Add my feature'`
4. Push: `git push origin feature/my-feature`
5. Create Pull Request

## API Documentation

See `/docs/` directory for complete API reference:

- `AI_PROVIDER_SPECIFICATION.md` - AI Provider API
- `AI_PROVIDER_README.md` - Integration guide
- `IMPLEMENTATION_SUMMARY.md` - Architecture details

## Need Help?

- **Issues**: https://github.rommark.dev/admin/antigravity-ai-providers/issues
- **Discussions**: https://github.rommark.dev/admin/antigravity-ai-providers/discussions

## Summary

1. Extract: `./scripts/extract-app.sh`
2. Modify: Edit files in `src/app-extracted/dist/`
3. Repack: `./scripts/repack-app.sh`
4. Build: `./scripts/build-deb.sh`
5. Install: `sudo dpkg -i packages/*.deb`

**Happy coding!** 🚀