mirror of
https://github.com/johndoe6345789/WizardMerge.git
synced 2026-04-24 13:44:55 +00:00
Add comprehensive implementation summary and pass security checks
Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot]
245
PR_URL_IMPLEMENTATION.md
Normal file
245
PR_URL_IMPLEMENTATION.md
Normal file
@@ -0,0 +1,245 @@
|
||||
# Pull Request URL Support - Implementation Summary
|
||||
|
||||
## Overview
|
||||
|
||||
This implementation adds the ability for WizardMerge to accept GitHub Pull Request URLs and automatically resolve merge conflicts using the existing three-way merge algorithm with advanced heuristics.
|
||||
|
||||
## Key Features
|
||||
|
||||
### 1. GitHub API Integration
|
||||
- **PR URL Parsing**: Extracts owner, repository, and PR number from GitHub URLs
|
||||
- **Metadata Fetching**: Retrieves PR information including base/head refs and commit SHAs
|
||||
- **File Content Retrieval**: Fetches file versions at specific commits with base64 decoding
|
||||
|
||||
### 2. HTTP API Endpoint
|
||||
- **Endpoint**: `POST /api/pr/resolve`
|
||||
- **Input**: PR URL, optional GitHub token, branch creation flags
|
||||
- **Output**: Detailed resolution results with file-by-file conflict status
|
||||
|
||||
### 3. CLI Integration
|
||||
- **Command**: `pr-resolve --url <pr_url>`
|
||||
- **Environment**: Supports `GITHUB_TOKEN` environment variable
|
||||
- **Options**: `--token`, `--branch`, `--output`
|
||||
|
||||
### 4. Resolution Algorithm
|
||||
For each modified file in the PR:
|
||||
1. Fetch base version (from PR base SHA)
|
||||
2. Fetch head version (from PR head SHA)
|
||||
3. Apply three-way merge algorithm
|
||||
4. Use auto-resolution heuristics:
|
||||
- Non-overlapping changes
|
||||
- Identical changes from both sides
|
||||
- Whitespace-only differences
|
||||
5. Return merged content or conflict markers
|
||||
|
||||
## Architecture
|
||||
|
||||
```
|
||||
GitHub API
|
||||
↓
|
||||
github_client.cpp (C++)
|
||||
↓
|
||||
PRController.cc (Drogon HTTP handler)
|
||||
↓
|
||||
three_way_merge.cpp (Core algorithm)
|
||||
↓
|
||||
JSON Response
|
||||
```
|
||||
|
||||
## Files Changed
|
||||
|
||||
### Backend Core
|
||||
- `backend/include/wizardmerge/git/github_client.h` - GitHub API client interface
|
||||
- `backend/src/git/github_client.cpp` - GitHub API implementation with libcurl
|
||||
- `backend/src/controllers/PRController.h` - PR resolution HTTP controller header
|
||||
- `backend/src/controllers/PRController.cc` - PR resolution controller implementation
|
||||
|
||||
### Build System
|
||||
- `backend/CMakeLists.txt` - Added libcurl dependency, conditional compilation
|
||||
- `backend/conanfile.py` - Added libcurl/8.4.0 to Conan requirements
|
||||
- `backend/build.sh` - Added non-interactive mode support
|
||||
|
||||
### Frontend
|
||||
- `frontends/cli/src/main.cpp` - Added `pr-resolve` command with argument parsing
|
||||
|
||||
### Testing
|
||||
- `backend/tests/test_github_client.cpp` - Unit tests for PR URL parsing
|
||||
|
||||
### Documentation
|
||||
- `README.md` - Added PR resolution examples and API documentation
|
||||
- `backend/README.md` - Detailed API endpoint documentation with curl examples
|
||||
- `backend/examples/pr_resolve_example.py` - Python example script
|
||||
- `spec/WizardMergeSpec.tla` - Updated formal specification with PR workflow
|
||||
|
||||
## Dependencies
|
||||
|
||||
### Required for PR Features
|
||||
- **libcurl**: HTTP client for GitHub API communication
|
||||
- **jsoncpp**: JSON parsing (transitive dependency from Drogon)
|
||||
|
||||
### Optional
|
||||
- **Drogon**: Web framework for HTTP server (required for API endpoint)
|
||||
- **GTest**: Testing framework (required for unit tests)
|
||||
|
||||
All dependencies can be installed via Conan package manager.
|
||||
|
||||
## Build Instructions
|
||||
|
||||
### With Conan (Recommended)
|
||||
```bash
|
||||
cd backend
|
||||
conan install . --output-folder=build --build=missing
|
||||
cd build
|
||||
cmake .. -G Ninja -DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake
|
||||
ninja
|
||||
```
|
||||
|
||||
### Without Full Dependencies
|
||||
```bash
|
||||
cd backend
|
||||
WIZARDMERGE_AUTO_BUILD=1 ./build.sh
|
||||
```
|
||||
|
||||
This builds the core library without GitHub API features.
|
||||
|
||||
## Usage Examples
|
||||
|
||||
### CLI Usage
|
||||
```bash
|
||||
# Basic PR resolution
|
||||
./wizardmerge-cli-frontend pr-resolve --url https://github.com/owner/repo/pull/123
|
||||
|
||||
# With GitHub token
|
||||
./wizardmerge-cli-frontend pr-resolve \
|
||||
--url https://github.com/owner/repo/pull/123 \
|
||||
--token ghp_xxx
|
||||
|
||||
# Save to file
|
||||
./wizardmerge-cli-frontend pr-resolve \
|
||||
--url https://github.com/owner/repo/pull/123 \
|
||||
-o result.json
|
||||
```
|
||||
|
||||
### HTTP API Usage
|
||||
```bash
|
||||
curl -X POST http://localhost:8080/api/pr/resolve \
|
||||
-H "Content-Type: application/json" \
|
||||
-d '{
|
||||
"pr_url": "https://github.com/owner/repo/pull/123",
|
||||
"github_token": "optional_token"
|
||||
}'
|
||||
```
|
||||
|
||||
### Python Script
|
||||
```bash
|
||||
python backend/examples/pr_resolve_example.py https://github.com/owner/repo/pull/123
|
||||
```
|
||||
|
||||
## Response Format
|
||||
|
||||
```json
|
||||
{
|
||||
"success": true,
|
||||
"pr_info": {
|
||||
"number": 123,
|
||||
"title": "Feature: Add new functionality",
|
||||
"base_ref": "main",
|
||||
"head_ref": "feature-branch",
|
||||
"base_sha": "abc1234",
|
||||
"head_sha": "def5678",
|
||||
"mergeable": false,
|
||||
"mergeable_state": "dirty"
|
||||
},
|
||||
"resolved_files": [
|
||||
{
|
||||
"filename": "src/example.cpp",
|
||||
"status": "modified",
|
||||
"had_conflicts": true,
|
||||
"auto_resolved": true,
|
||||
"merged_content": ["line1", "line2", "..."]
|
||||
}
|
||||
],
|
||||
"total_files": 5,
|
||||
"resolved_count": 4,
|
||||
"failed_count": 0,
|
||||
"branch_created": false,
|
||||
"note": "Branch creation requires Git CLI integration (not yet implemented)"
|
||||
}
|
||||
```
|
||||
|
||||
## Limitations and Future Work
|
||||
|
||||
### Current Limitations
|
||||
1. **Branch Creation**: Not yet implemented; requires Git CLI integration
|
||||
2. **Merge Base**: Uses simplified merge logic (base vs head) instead of true merge-base commit
|
||||
3. **Large Files**: GitHub API has file size limits (~100MB)
|
||||
4. **Rate Limiting**: GitHub API has rate limits (60/hour unauthenticated, 5000/hour authenticated)
|
||||
|
||||
### Future Enhancements
|
||||
1. **Git Integration**: Clone repo, create branches, push resolved changes
|
||||
2. **Merge Base Detection**: Use `git merge-base` to find true common ancestor
|
||||
3. **Semantic Merging**: Language-aware conflict resolution (JSON, YAML, etc.)
|
||||
4. **Dependency Analysis**: SDG-based conflict detection (from research paper)
|
||||
5. **Interactive Mode**: Present conflicts to user for manual resolution
|
||||
6. **Batch Processing**: Resolve multiple PRs in parallel
|
||||
|
||||
## Testing
|
||||
|
||||
### Unit Tests
|
||||
```bash
|
||||
cd backend/build
|
||||
./wizardmerge-tests --gtest_filter=GitHubClientTest.*
|
||||
```
|
||||
|
||||
Tests cover:
|
||||
- PR URL parsing (valid and invalid formats)
|
||||
- Special characters in owner/repo names
|
||||
- Different URL formats (with/without https, www)
|
||||
|
||||
### Integration Testing
|
||||
Requires:
|
||||
- Running backend server with Drogon + CURL
|
||||
- GitHub API access (public or with token)
|
||||
- Real or mock GitHub repository with PRs
|
||||
|
||||
## Performance Considerations
|
||||
|
||||
- **API Calls**: One call for PR metadata + N calls for file contents (where N = modified files)
|
||||
- **Rate Limits**: Use GitHub tokens to increase limits
|
||||
- **Caching**: File contents could be cached by SHA for repeated resolutions
|
||||
- **Concurrency**: File fetching could be parallelized
|
||||
|
||||
## Security
|
||||
|
||||
- **Token Handling**: Tokens passed via headers, not logged
|
||||
- **Input Validation**: URL parsing validates format before API calls
|
||||
- **Base64 Decoding**: Custom decoder avoids potential vulnerabilities in external libs
|
||||
- **Rate Limiting**: Respects GitHub API limits to avoid abuse
|
||||
|
||||
## Formal Specification
|
||||
|
||||
The TLA+ specification (`spec/WizardMergeSpec.tla`) has been updated to include:
|
||||
- PR resolution workflow model
|
||||
- File processing state machine
|
||||
- Success criteria and invariants
|
||||
- Proof of correctness properties
|
||||
|
||||
## Compliance with Roadmap
|
||||
|
||||
This implementation completes **Phase 1.2** of the roadmap:
|
||||
- ✅ Parse pull request URLs
|
||||
- ✅ Fetch PR data via GitHub API
|
||||
- ✅ Apply merge algorithm to PR files
|
||||
- ✅ HTTP API endpoint
|
||||
- ✅ CLI command
|
||||
- ✅ Documentation
|
||||
- ⏳ Git branch creation (future)
|
||||
|
||||
## Contributing
|
||||
|
||||
To extend this feature:
|
||||
1. Add new merge strategies in `three_way_merge.cpp`
|
||||
2. Enhance GitHub client for additional API endpoints
|
||||
3. Implement Git CLI integration for branch creation
|
||||
4. Add language-specific semantic merging
|
||||
5. Improve error handling and retry logic
|
||||
Reference in New Issue
Block a user