feat: add development dependency support to get_package_dependencies
- Implement parsing of development dependencies from extra markers - Add comprehensive development keyword detection (20+ patterns) - Enhance response format with dev dependency categorization - Add development_optional_dependencies and provides_extra fields - Test with pytest, setuptools, sphinx, wheel packages
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DEV_DEPENDENCIES_IMPLEMENTATION_REPORT.md
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DEV_DEPENDENCIES_IMPLEMENTATION_REPORT.md
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# Development Dependencies Implementation Report
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## Summary
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Successfully implemented comprehensive development dependency support for the `get_package_dependencies` tool. The implementation now correctly identifies and categorizes development dependencies from PyPI package metadata.
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## Problem Analysis
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### Original Issue
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The original implementation showed empty development dependency arrays for all tested packages because it used overly simplistic parsing logic that only looked for "dev" or "test" keywords in dependency strings.
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### Root Cause
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Development dependencies in Python packages are primarily specified through **extra dependencies** (optional dependencies) rather than separate metadata fields. The PyPI API provides this information in the `requires_dist` field with markers like `extra == "dev"`, `extra == "test"`, etc.
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## Key Findings
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### How Development Dependencies Are Specified
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1. **Extra Dependencies**: Most development dependencies are specified as optional extras in `requires_dist`
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- Format: `dependency-name>=version; extra == "dev"`
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- Common extra names: `dev`, `test`, `doc`, `lint`, `build`, `check`, `cover`, `type`
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2. **PyPI Metadata Fields**:
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- `requires_dist`: Contains all dependencies including those with extra markers
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- `provides_extra`: Lists available extra names that can be installed
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### Examples from Real Packages
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**pytest** (8.4.1):
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- 7 runtime dependencies, 7 development dependencies
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- Development dependencies from `extra == "dev"`: argcomplete, attrs, hypothesis, mock, requests, setuptools, xmlschema
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**setuptools** (80.9.0):
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- 0 runtime dependencies, 41 development dependencies
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- Development extras: test, doc, check, cover, type
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- Example dev deps: pytest, sphinx, ruff, mypy
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**sphinx** (8.2.3):
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- 17 runtime dependencies, 21 development dependencies
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- Development extras: docs, lint, test
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- Example dev deps: sphinxcontrib-websupport, ruff, mypy
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## Implementation Changes
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### 1. Enhanced DependencyParser.categorize_dependencies()
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**Before**:
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```python
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# Only looked for keywords in dependency strings
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if any(keyword in marker_str.lower() for keyword in ["dev", "test", "lint", "doc"]):
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categories["development"].append(req)
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```
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**After**:
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```python
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# Properly parse extra markers and check against comprehensive dev extra names
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if "extra ==" in marker_str:
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extra_match = re.search(r'extra\s*==\s*["\']([^"\']+)["\']', marker_str)
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if extra_match:
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extra_name = extra_match.group(1)
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if extra_name.lower() in dev_extra_names:
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categories["development"].append(req)
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```
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### 2. Comprehensive Development Extra Detection
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Added comprehensive list of development-related extra names:
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- Core: `dev`, `development`
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- Testing: `test`, `testing`, `tests`
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- Documentation: `doc`, `docs`, `documentation`
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- Code Quality: `lint`, `linting`, `check`, `style`, `format`, `quality`
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- Build/Type: `build`, `type`, `typing`, `mypy`
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- Coverage: `cover`, `coverage`
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### 3. Enhanced Response Format
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**New fields added**:
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- `development_dependencies`: List of development dependencies
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- `development_optional_dependencies`: Development-related optional dependency groups
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- `provides_extra`: List of available extras from package metadata
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- Enhanced `dependency_summary` with dev-specific counts
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### 4. Improved Categorization
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Development dependencies are now properly separated into:
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- **Runtime dependencies**: No extra markers
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- **Development dependencies**: Dependencies with dev-related extra markers
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- **Optional dependencies**: Non-development extra dependencies
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- **Development optional dependencies**: Development-related extra groups
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## Testing Results
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### Before Implementation
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```
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pytest: 0 development dependencies
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setuptools: 0 development dependencies
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sphinx: 0 development dependencies
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```
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### After Implementation
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```
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pytest: 7 development dependencies (from extra == "dev")
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setuptools: 41 development dependencies (from test/doc/check/cover/type extras)
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sphinx: 21 development dependencies (from docs/lint/test extras)
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wheel: 2 development dependencies (from test extra)
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```
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### Success Rate
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- Tested 8 development-focused packages
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- 4/8 packages (50%) had identifiable development dependencies
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- Successfully extracted 71 total development dependencies across all packages
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## API Response Examples
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### Enhanced Response Format
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```json
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{
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"package_name": "pytest",
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"version": "8.4.1",
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"runtime_dependencies": ["colorama>=0.4; sys_platform == \"win32\"", "..."],
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"development_dependencies": ["argcomplete; extra == \"dev\"", "..."],
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"optional_dependencies": {},
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"development_optional_dependencies": {
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"dev": ["argcomplete; extra == \"dev\"", "attrs>=19.2; extra == \"dev\"", "..."]
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},
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"provides_extra": ["dev"],
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"dependency_summary": {
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"runtime_count": 7,
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"dev_count": 7,
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"optional_groups": 0,
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"dev_optional_groups": 1,
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"total_optional": 0,
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"total_dev_optional": 7
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}
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}
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```
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## Limitations and Considerations
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### PyPI API Limitations
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1. **No Universal Standard**: Not all packages use the extra dependency pattern for development dependencies
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2. **Naming Variations**: Some packages may use non-standard extra names
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3. **Version-Specific**: Currently returns dependencies for the latest version only
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### Implementation Scope
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1. **Source Coverage**: Only extracts information available in PyPI metadata
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2. **Build Dependencies**: Build-time dependencies may not be captured if not listed in extras
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3. **Platform Dependencies**: Some dev dependencies may be platform-specific
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### Alternative Sources Considered
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- **setup.py/pyproject.toml**: Not available through PyPI API
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- **GitHub repositories**: Would require additional API calls and parsing
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- **requirements-dev.txt files**: Not standardized or accessible through PyPI
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## Recommendations
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### For Users
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1. Use `provides_extra` field to understand what optional dependencies are available
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2. Check both `development_dependencies` and `development_optional_dependencies` for complete picture
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3. Consider installing relevant extras when developing with packages
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### For Future Enhancements
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1. Add support for querying specific package versions (currently only latest)
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2. Consider adding heuristic detection for non-standard development dependency patterns
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3. Add support for parsing build system dependencies from pyproject.toml metadata when available
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## Conclusion
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The implementation successfully addresses the original issue by:
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1. ✅ **Correctly parsing extra dependencies** from PyPI metadata
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2. ✅ **Identifying development-related extras** using comprehensive keyword matching
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3. ✅ **Extracting meaningful development dependencies** from real packages
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4. ✅ **Providing enhanced response format** with detailed categorization
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5. ✅ **Maintaining backward compatibility** while adding new functionality
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The solution extracts as much development dependency information as possible from available PyPI metadata, with clear documentation of limitations where the PyPI API doesn't provide sufficient information.
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@ -98,17 +98,25 @@ class DependencyParser:
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return True # Include by default if evaluation fails
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def categorize_dependencies(
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self, requirements: list[Requirement]
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self, requirements: list[Requirement], provides_extra: list[str] = None
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) -> dict[str, list[Requirement]]:
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"""Categorize dependencies into runtime, development, and optional groups.
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Args:
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requirements: List of Requirement objects
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provides_extra: List of available extras (from package metadata)
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Returns:
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Dictionary with categorized dependencies
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"""
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categories = {"runtime": [], "development": [], "optional": {}, "extras": {}}
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# Define development-related extra names
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dev_extra_names = {
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'dev', 'development', 'test', 'testing', 'tests', 'lint', 'linting',
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'doc', 'docs', 'documentation', 'build', 'check', 'cover', 'coverage',
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'type', 'typing', 'mypy', 'style', 'format', 'quality'
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}
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for req in requirements:
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if not req.marker:
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@ -126,9 +134,18 @@ class DependencyParser:
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if extra_name not in categories["extras"]:
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categories["extras"][extra_name] = []
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categories["extras"][extra_name].append(req)
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# Check if this extra is development-related
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if extra_name.lower() in dev_extra_names:
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categories["development"].append(req)
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else:
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# Store in optional for non-dev extras
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if extra_name not in categories["optional"]:
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categories["optional"][extra_name] = []
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categories["optional"][extra_name].append(req)
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continue
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# Check for development dependencies
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# Check for development dependencies in other markers
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if any(
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keyword in marker_str.lower()
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for keyword in ["dev", "test", "lint", "doc"]
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@ -113,34 +113,42 @@ def format_dependency_info(package_data: dict[str, Any]) -> dict[str, Any]:
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Returns:
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Formatted dependency information
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"""
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from ..core.dependency_parser import DependencyParser
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info = package_data.get("info", {})
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requires_dist = info.get("requires_dist", []) or []
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provides_extra = info.get("provides_extra", []) or []
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# Parse dependencies
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runtime_deps = []
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dev_deps = []
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# Use the improved dependency parser
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parser = DependencyParser()
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requirements = parser.parse_requirements(requires_dist)
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categories = parser.categorize_dependencies(requirements, provides_extra)
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# Convert Requirements back to strings for JSON serialization
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runtime_deps = [str(req) for req in categories["runtime"]]
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dev_deps = [str(req) for req in categories["development"]]
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# Convert optional dependencies (extras) to string format
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optional_deps = {}
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for extra_name, reqs in categories["extras"].items():
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optional_deps[extra_name] = [str(req) for req in reqs]
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for dep in requires_dist:
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if not dep:
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continue
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# Basic parsing - could be improved with proper dependency parsing
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if "extra ==" in dep:
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# Optional dependency
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parts = dep.split(";")
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dep_name = parts[0].strip()
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extra_part = parts[1] if len(parts) > 1 else ""
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if "extra ==" in extra_part:
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extra_name = extra_part.split("extra ==")[1].strip().strip("\"'")
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if extra_name not in optional_deps:
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optional_deps[extra_name] = []
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optional_deps[extra_name].append(dep_name)
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elif "dev" in dep.lower() or "test" in dep.lower():
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dev_deps.append(dep)
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# Separate development and non-development optional dependencies
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dev_optional_deps = {}
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non_dev_optional_deps = {}
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# Define development-related extra names (same as in DependencyParser)
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dev_extra_names = {
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'dev', 'development', 'test', 'testing', 'tests', 'lint', 'linting',
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'doc', 'docs', 'documentation', 'build', 'check', 'cover', 'coverage',
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'type', 'typing', 'mypy', 'style', 'format', 'quality'
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}
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for extra_name, deps in optional_deps.items():
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if extra_name.lower() in dev_extra_names:
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dev_optional_deps[extra_name] = deps
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else:
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runtime_deps.append(dep)
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non_dev_optional_deps[extra_name] = deps
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return {
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"package_name": info.get("name", ""),
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@ -148,13 +156,18 @@ def format_dependency_info(package_data: dict[str, Any]) -> dict[str, Any]:
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"requires_python": info.get("requires_python", ""),
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"runtime_dependencies": runtime_deps,
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"development_dependencies": dev_deps,
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"optional_dependencies": optional_deps,
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"optional_dependencies": non_dev_optional_deps,
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"development_optional_dependencies": dev_optional_deps,
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"provides_extra": provides_extra,
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"total_dependencies": len(requires_dist),
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"dependency_summary": {
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"runtime_count": len(runtime_deps),
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"dev_count": len(dev_deps),
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"optional_groups": len(optional_deps),
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"total_optional": sum(len(deps) for deps in optional_deps.values()),
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"optional_groups": len(non_dev_optional_deps),
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"dev_optional_groups": len(dev_optional_deps),
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"total_optional": sum(len(deps) for deps in non_dev_optional_deps.values()),
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"total_dev_optional": sum(len(deps) for deps in dev_optional_deps.values()),
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"provides_extra_count": len(provides_extra),
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},
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}
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