contrib-checker

contrib-checker checks if code contributors are properly listed in metadata files such as CITATION.cff and codemeta.json based on the git history.

It provides:

• Python library: Installable package for programmatic use
• Command-line tool: contrib-checker CLI for local checking
• GitHub Action: Automated checking in GitHub workflows
• GitLab CI: Support for GitLab merge request checking

Installation

As a Python package

pip install contrib-checker

For development

git clone https://github.com/vuillaut/contrib-checker.git
cd contrib-checker
pip install -e .

Usage

Command-line tool

After installation, you can use the contrib-checker command:

# Check all contributors in current repository
contrib-checker

# Check with specific mode
contrib-checker --mode fail

# Check with ignore lists
contrib-checker --ignore-emails bot@example.com --ignore-logins bot-user

# Check specific commit range
contrib-checker --from-sha abc123 --to-sha def456

# Use specific repository path
contrib-checker --repo-path /path/to/repo

# See all options
contrib-checker --help

As a Python library

from contrib_checker import ContributorChecker
from pathlib import Path

# Initialize checker
config = {
    'mode': 'warn',  # or 'fail'
    'ignore_emails': ['bot@example.com'],
    'ignore_logins': ['bot-user']
}

checker = ContributorChecker(
    repo_path=Path('.'),
    config=config
)

# Check all contributors
success, results = checker.check_all_contributors()

# Check specific commit range
success, results = checker.check_range_contributors(
    from_sha='abc123',
    to_sha='def456', 
    description='PR commits'
)

# Check results
if results['missing_overall']:
    print("Missing contributors:")
    for contributor in results['missing_overall']:
        print(f"  {contributor}")

Platform-specific usage

# GitHub-specific wrapper
from contrib_checker import GitHubContributorChecker

github_checker = GitHubContributorChecker()
success = github_checker.check_pr_contributors()

# GitLab-specific wrapper  
from contrib_checker import GitLabContributorChecker

gitlab_checker = GitLabContributorChecker()
success = gitlab_checker.check_mr_contributors()

GitHub Action Setup

Quick start

1. Ensure your repository has CITATION.cff and/or codemeta.json with author/contributor entries.
2. Add a .mailmap at the repository root if you need to unify alternate emails or names from the git history.
3. Add this action (or copy the workflow) into your repo in .github/workflows/contrib-check.yml; the included workflow triggers on pull requests.

Example .github/workflows/contrib-check.yml

name: Contributor Check

on:
  pull_request:
    types: [opened, synchronize]

permissions:
  contents: read
  pull-requests: write # allows posting comments on PRs

jobs:
  contrib-check:
    runs-on: ubuntu-latest
    
    steps:
      - name: Contrib metadata check
        uses: vuillaut/contrib-checker@main
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          mode: warn  # or 'fail' to make the workflow fail when contributors are missing
          ignore_emails: "dependabot[bot]@users.noreply.github.com,ci-bot@example.com"
          ignore_logins: "dependabot[bot],github-actions[bot]"

GitLab CI Setup

See GITLAB_CI_USAGE.md for detailed GitLab CI setup instructions.

Example .gitlab-ci.yml

contrib-check:
  stage: test
  image: python:3.11
  script:
    - pip install contrib-checker
    - contrib-checker
  rules:
    - if: $CI_PIPELINE_SOURCE == "merge_request_event"

How it works

• Uses git log --use-mailmap to collect commit authors, so ensure .mailmap is present if you need to unify multiple emails
• Compares commit authors against CITATION.cff and codemeta.json contributors
• Posts comments on GitHub PRs or GitLab MRs when missing contributors are found
• Can be configured to fail CI when contributors are missing (mode: fail)

Requirements

• Python 3.8+
• Git repository with contributor metadata files
• For GitHub Actions: CITATION.cff or codemeta.json file
• For GitLab CI: Same metadata files plus GitLab API token
• Optional: .mailmap file to unify contributor names/emails

Configuration

The tool can be configured via:

1. Configuration file: .github/contrib-metadata-check.yml (GitHub) or environment variables (GitLab)
2. Command-line arguments: When using the CLI
3. Environment variables: For CI/CD integration

Configuration options

• mode: warn (default) or fail
• ignore_emails: List of email addresses to ignore
• ignore_logins: List of login names to ignore

Contributing

See CONTRIBUTING.md for development guidelines.

License

This project is licensed under the MIT License - see the LICENSE file for details.