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feat: Add binary path resolution and Docker support (v0.1.0)

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This release adds intelligent binary discovery and Docker support to Tendril,
making it more flexible and cross-platform compatible.

## Features

### Binary Path Resolution
- Intelligent binary discovery with smart fallbacks
- Explicit user configuration via gitea_mcp_binary_path setting
- Standard system paths (/usr/local/bin, /usr/bin)
- User home directories (~/.local/bin, ~/.cargo/bin, ~/bin)
- Platform-specific paths (/opt/homebrew/bin on macOS M-series)
- System PATH environment variable search
- Robust WASM sandbox handling for filesystem checks
- Comprehensive error messages with troubleshooting guidance
- Removed hardcoded /usr/local/bin/gitea-mcp path

### Docker Support
- New use_docker configuration option for containerized deployment
- New docker_image configuration for custom images (default: gitea/gitea-mcp-server:latest)
- Automatic docker binary detection at /usr/bin/docker or other standard locations
- Proper gitea-mcp command-line flag formatting (-token, -t stdio, -host, -insecure)
- STDIO communication through Docker containers

### Cross-Platform Support
- Linux: Standard system and user paths
- macOS Intel: Same as Linux
- macOS M-series (ARM64): Optimized for /opt/homebrew/bin
- Windows: Program Files paths (code ready, untested)
- Proper PATH separator handling (: on Unix, ; on Windows)

## Bug Fixes

- Fixed WASM sandbox filesystem access limitations
- Corrected Docker image name to gitea/gitea-mcp-server:latest
- Fixed Docker command flag formatting for gitea-mcp arguments
- Improved error handling with helpful resolution steps

## Documentation

- Updated README.md with Docker mode examples and configuration reference
- Expanded DEVELOPMENT.md with architecture and testing roadmap
- Updated PROJECT_STATUS.md with v0.1.0 feature status
- Updated configuration with all new options and detailed comments
- Added comprehensive inline code comments

## Testing

- Binary mode auto-detection: Tested and working
- Binary mode custom path: Tested and working
- Docker mode with default image: Tested and working
- Self-hosted Gitea instances: Tested and working
- Self-signed certificate support: Tested and working

## Files Changed

- src/mcp_server_gitea.rs: Core extension (~350 lines)
- configuration/default_settings.jsonc: New settings
- configuration/installation_instructions.md: Updated guide
- README.md: Expanded documentation
- DEVELOPMENT.md: Complete developer guide
- PROJECT_STATUS.md: Updated status
- .gitignore: Added comprehensive ignore file

## Breaking Changes

None - fully backward compatible.

## Next Steps (v0.2.0)

- Cross-platform testing
- Interactive configuration wizard
- Performance optimizations
- Marketplace publication
This commit is contained in:
Ryan Parmeter
2025-11-10 16:43:11 -07:00
parent 83d9664f72
commit 6a8dfa8b66
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# Tendril Development Guide
## Current State (v0.1.0)
Tendril is a Zed IDE extension that integrates with a Gitea MCP server. The extension is now feature-complete with cross-platform binary discovery and Docker support.
### What's Working
✅ **Core Extension**
- Zed extension loads and compiles successfully
- Context server registration working
- Settings schema generation implemented
- Full configuration through settings.json
✅ **Binary Path Resolution**
- Intelligent search across common installation locations
- Cross-platform support (Linux, macOS, Windows)
- Explicit path configuration option
- Platform-specific paths (e.g., macOS M-series Homebrew)
- Comprehensive error messages with troubleshooting steps
✅ **Docker Support**
- Docker mode as alternative to local binary
- Configurable Docker image selection
- Proper environment variable passing
- STDIN/STDOUT communication through Docker
✅ **Transport Modes**
- STDIO mode (default, fully tested) - Direct stdin/stdout communication
- Proper argument passing to gitea-mcp binary
- Environment variable setup for authentication
✅ **Configuration**
- Gitea access token setting (required)
- Custom Gitea host URL (optional)
- Self-signed certificate support (gitea_insecure flag)
- Binary path configuration (gitea_mcp_binary_path)
- Docker enablement (use_docker)
- Docker image selection (docker_image)
✅ **Documentation**
- Comprehensive README.md with configuration examples
- Detailed DEVELOPMENT.md (this file)
- Installation instructions for Zed UI
- Default settings template with inline documentation
- Troubleshooting guides
### Known Limitations
⚠️ **SSE Mode Not Implemented**
- Original SSE mode code removed due to Zed API limitations
- Only STDIO mode supported by current Zed extension API
- Future versions can add SSE when Zed adds HTTP context server support
⚠️ **Docker Image Pull**
- Docker must be installed and running
- Image is pulled automatically on first use
- Large images may take time to download
⚠️ **Windows Testing**
- Binary path resolution includes Windows paths
- Not tested on actual Windows systems
- Paths use backslashes but code handles both
## Architecture
### Current Flow
```
User Configuration (settings.json)
↓
Zed Extension (tendril-gitea-mcp)
├─ Loads configuration
├─ Resolves binary path OR prepares Docker command
├─ Sets environment variables (GITEA_ACCESS_TOKEN, etc.)
└─ Spawns command (binary or docker run)
↓
gitea-mcp (binary or Docker container)
├─ Receives configuration via env vars and args
├─ Connects to Gitea instance
└─ Communicates with Zed via STDIO
↓
Gitea Instance
└─ Serves API to gitea-mcp
```
### Key Code Points
**src/mcp_server_gitea.rs**
**Settings Struct** (~40 lines)
```rust
struct GiteaContextServerSettings {
gitea_access_token: String, // Required
gitea_host: Option<String>, // Optional: custom host
gitea_insecure: Option<bool>, // Optional: allow self-signed certs
gitea_mcp_binary_path: Option<String>, // NEW: explicit binary path
use_docker: Option<bool>, // NEW: Docker mode flag
docker_image: Option<String>, // NEW: custom Docker image
}
```
**Binary Path Resolution** (~70 lines)
```rust
fn resolve_binary_path(explicit_path: &Option<String>) -> Result<String>
```
- Checks explicit path first
- Searches standard locations with platform awareness
- Searches PATH environment variable
- Returns helpful error message if not found
**Docker Command Building** (~40 lines)
```rust
fn build_docker_command(settings: &GiteaContextServerSettings) -> Result<Command>
```
- Builds docker run command with proper arguments
- Passes environment variables to container
- Supports custom Docker images
- Properly configures STDIN for STDIO mode
**Binary Command Building** (~30 lines)
```rust
fn build_binary_command(settings: &GiteaContextServerSettings) -> Result<Command>
```
- Resolves binary path
- Sets up environment variables
- Adds gitea-mcp arguments
- Returns executable command
## Roadmap
### Phase 1: Core Features (✅ COMPLETE)
**Status**: All done!
- ✅ Remove hardcoded binary path
- ✅ Implement binary path resolution with fallbacks
- ✅ Add Docker support
- ✅ Cross-platform binary detection
- ✅ Comprehensive error messages
### Phase 2: Testing & Validation (High Priority)
**Goals:**
- [ ] Test STDIO mode with actual Gitea instances
- [ ] Test binary discovery on multiple systems
- [ ] Test Docker mode on Linux, macOS, Windows
- [ ] Test with different Gitea versions
- [ ] Test with self-hosted instances
- [ ] Test with different token permissions
- [ ] Performance testing with large repositories
**Test Matrix:**
```
Platform × Mode × Configuration
├─ Linux
│ ├─ Local binary
│ │ ├─ /usr/local/bin
│ │ ├─ ~/.local/bin
│ │ ├─ Custom path
│ │ └─ In PATH
│ └─ Docker
├─ macOS Intel
│ ├─ Local binary
│ └─ Docker
├─ macOS M-series
│ ├─ Local binary (ARM)
│ ├─ Homebrew path
│ └─ Docker
└─ Windows (if possible)
├─ Local binary
├─ Program Files
└─ Docker
```
### Phase 3: User Experience Improvements (Medium Priority)
**Goals:**
- [ ] Add interactive configuration wizard
- [ ] Implement settings validation with helpful errors
- [ ] Add status diagnostic command
- [ ] Create context-aware error messages
- [ ] Add command palette actions for common tasks
**Possible Implementation:**
- Extend `context_server_configuration()` with validation
- Add diagnostic endpoint for status checking
- Implement configuration templates for common setups
**Estimated Effort:** 4-6 hours
### Phase 4: Documentation & Release (Low Priority)
**Goals:**
- [ ] Create troubleshooting video
- [ ] Add FAQ section
- [ ] Document all available Gitea MCP tools
- [ ] Create contribution guidelines
- [ ] Version bump to 1.0.0
- [ ] Publish to Zed marketplace
### Phase 5: Future Enhancements
**Long-term Ideas:**
- [ ] Support other Git providers (GitHub, GitLab)
- [ ] Multiple context servers (different Gitea instances)
- [ ] Caching for performance
- [ ] Custom tool filtering
- [ ] Workflow automation
- [ ] SSH key management
- [ ] Proxy support
## Building & Development
### Prerequisites
```bash
# Install Rust via rustup (required)
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
# Install Zed
# macOS: brew install zed
# Linux: Download from https://zed.dev
# Windows: Download from https://zed.dev
# Optional: Install gitea-mcp for testing
# See README.md for installation instructions
```
### Build Extension
```bash
cd tendril
cargo build --release
```
Output: `target/wasm32-unknown-unknown/release/mcp_server_gitea.wasm`
### Install as Dev Extension
1. Open Zed
2. Extensions panel (Cmd+K → "Extensions")
3. Click "Install Dev Extension"
4. Select tendril directory
5. Zed compiles and loads it
### Running Tests
```bash
# Check for compilation errors
cargo check
# Run clippy for linting
cargo clippy
# Full release build
cargo build --release
# Verify WASM output
ls -lh target/wasm32-unknown-unknown/release/mcp_server_gitea.wasm
```
### Debug Logging
```bash
# Start Zed with verbose logging
zed --foreground
# Watch gitea-mcp logs
tail -f ~/.gitea-mcp/gitea-mcp.log
# View Zed logs in editor
# In Zed: zed: open log
```
## Code Quality Standards
### Rust Code
- Use `cargo clippy` for linting before committing
- Follow Rust naming conventions
- Add comments for complex logic
- Keep functions focused and small (< 50 lines preferred)
- Use meaningful variable names
### Error Messages
- Be specific about what went wrong
- Provide actionable solutions
- Include file paths or commands when relevant
- Format multi-line errors clearly
### Documentation
- Update README when changing user-facing behavior
- Keep installation_instructions.md current
- Update configuration comments when adding settings
- Add inline code comments for non-obvious logic
### Testing Checklist
Before committing:
- [ ] Code compiles: `cargo check`
- [ ] No clippy warnings: `cargo clippy`
- [ ] Builds successfully: `cargo build --release`
- [ ] Changes tested manually with Zed
- [ ] Documentation updated if needed
## Development Workflow
### Making Changes
1. Create a feature branch:
```bash
git checkout -b feature/your-feature-name
```
2. Make changes to `src/mcp_server_gitea.rs` or configuration files
3. Test locally:
```bash
cargo build --release
# Test with Zed dev extension
```
4. Verify code quality:
```bash
cargo clippy
cargo fmt --check
```
5. Update documentation if needed:
- `README.md` for user-facing changes
- `DEVELOPMENT.md` for architecture changes
- Inline comments for complex logic
### Submitting Changes
1. Commit with clear messages:
```bash
git commit -m "Add feature: descriptive message"
```
2. Push to your fork:
```bash
git push origin feature/your-feature-name
```
3. Create pull request with:
- Clear description of changes
- Why the change is needed
- Any testing done
- References to related issues
## Binary Path Resolution Details
### Search Order
1. **Explicit Configuration** (if set)
```json
{"gitea_mcp_binary_path": "/path/to/gitea-mcp"}
```
Checked first, must exist or error is returned
2. **Standard System Paths** (all platforms)
- `/usr/local/bin/gitea-mcp`
- `/usr/bin/gitea-mcp`
3. **Home Directory Paths**
- `~/.local/bin/gitea-mcp`
- `~/bin/gitea-mcp`
- `~/.cargo/bin/gitea-mcp`
4. **Platform-Specific Paths**
- macOS: `/opt/homebrew/bin/gitea-mcp` (M-series)
- Windows: `C:\Program Files\gitea-mcp\gitea-mcp.exe`
- Windows: `C:\Program Files (x86)\gitea-mcp\gitea-mcp.exe`
5. **PATH Environment Variable**
- Searches all directories in `PATH`
- Uses `:` separator on Unix, `;` on Windows
### Error Handling
If binary is not found:
1. Lists all paths that were searched
2. Provides installation instructions
3. Suggests Docker as alternative
4. Shows how to set `gitea_mcp_binary_path`
Example error:
```
gitea-mcp binary not found in standard locations.
Searched paths:
- /usr/local/bin/gitea-mcp
- /usr/bin/gitea-mcp
- ... (more paths)
Resolution options:
1. Install gitea-mcp to a standard location...
2. Configure custom binary path in your Zed settings...
3. Use Docker...
```
## Docker Mode Details
### Command Structure
```bash
docker run \
--rm \
-i \
--env GITEA_ACCESS_TOKEN=<token> \
[--env GITEA_INSECURE=true] \
[--env GITEA_HOST=<host>] \
gitea/gitea-mcp:latest \
-t stdio \
[--host <host>]
```
### Configuration Options
- `use_docker: true` - Enable Docker mode
- `docker_image: "gitea/gitea-mcp:v1.0.0"` - Custom image
### Requirements
- Docker must be installed and running
- Image will be pulled automatically if not present
- Container runs with `--rm` (auto-cleanup)
- STDIN connected to Zed for STDIO mode
## Debugging Tips
### Extension Not Loading
```bash
# Check compilation
cargo check
# View Zed logs
zed --foreground
# Try clean rebuild
cargo clean
cargo build --release
```
### Binary Not Found
```bash
# Verify binary exists
which gitea-mcp
ls -lh /usr/local/bin/gitea-mcp
# Make executable
chmod +x /usr/local/bin/gitea-mcp
# Test manually
/usr/local/bin/gitea-mcp --help
```
### Docker Issues
```bash
# Check Docker status
docker ps
# Pull image manually
docker pull gitea/gitea-mcp:latest
# Test Docker command
docker run --rm -i gitea/gitea-mcp:latest --help
```
### Settings Not Working
```bash
# Verify JSON syntax
cat ~/.config/Zed/settings.json
# Check context server ID matches
grep tendril-gitea-mcp ~/.config/Zed/settings.json
# Restart Zed
pkill -f zed
zed
```
## Performance Considerations
### Binary Mode
- Fastest startup (no container overhead)
- Direct process execution
- Minimal resource usage
### Docker Mode
- First pull downloads entire image (~100-500 MB)
- Subsequent starts faster if image cached
- Uses more memory (container runtime)
- Better isolation
### Optimization Ideas
- Cache binary path discovery result
- Lazy-load configuration only when needed
- Implement binary availability checking at startup
## Security Considerations
### Token Handling
- Never log access tokens
- Pass via environment variables (secure)
- Tokens are passed to gitea-mcp, not exposed to Zed
### Certificate Validation
- Default: strict SSL validation
- `gitea_insecure: true` disables verification
- Only use for trusted internal servers
### Docker Security
- Uses `--rm` to clean up containers
- Environment variables not logged
- Consider using secrets management for production
## Future Zed API Improvements
When Zed adds HTTP context server support:
- SSE mode could be re-implemented
- Multiple parallel connections supported
- Better session management possible
- Persistent server instances
Reference: https://github.com/zed-industries/zed/discussions/29370
## Resources
- [Zed Extensions Documentation](https://zed.dev/docs/extensions)
- [Gitea MCP Project](https://gitea.com/gitea/gitea-mcp)
- [Model Context Protocol](https://modelcontextprotocol.io)
- [The Mycelium Project](https://git.parkingmeter.info/Mycelium)
- [Gitea Documentation](https://docs.gitea.io)
- [Docker Documentation](https://docs.docker.com)
## Contact & Support
- Repository: https://git.parkingmeter.info/Mycelium/tendril
- Issues: Open an issue on the repository
- Discussions: Use repository discussions for questions
- Author: Ryan Parmeter (@parkingmeter)