pre-commit.yaml

---
# https://pre-commit.com
# This GitHub Action assumes that the repo contains a valid .pre-commit-config.yaml file.
name: pre-commit
on:
  pull_request:
  push:
    branches: [main]

permissions:
  contents: read  # to fetch code (actions/checkout)

jobs:
  pre-commit:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
      - uses: pre-commit/action@v3.0.1

  conventional-commits:
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0  # Full history needed for commit comparison

      - name: Fetch main branch ref (not available in PR context)
        run: git fetch origin main:main

      - name: Lint all commit messages within the PR
        run: |
          python -m pip install --upgrade pip
          pip install git+https://gitlab.ethz.ch/sis/tools/conventional-commit-lint.git@0.9.0
          git log --pretty="commit %h%n%B%x00" --no-merges ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }} | conventional-commit-lint