commit-messages.yml

name: Conventional Commits

on:
  push:
    tags-ignore:
      - "v*"
  pull_request:
    types: [opened, synchronize, reopened]

permissions:
  contents: read
  pull-requests: read

jobs:
  commit-subjects:
    name: Validate commit messages
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          submodules: recursive
      - uses: actions/setup-python@v5
        with:
          python-version: "3.12"
      - name: Resolve commit range
        id: commit_range
        run: |
          set -euo pipefail

          if [ "${GITHUB_EVENT_NAME}" = "pull_request" ]; then
            range="${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }}"
          else
            before_sha="${{ github.event.before }}"
            after_sha="${GITHUB_SHA}"

            if [ "${before_sha}" = "0000000000000000000000000000000000000000" ]; then
              if git rev-parse "${after_sha}^" >/dev/null 2>&1; then
                range="${after_sha}^..${after_sha}"
              else
                range="${after_sha}..${after_sha}"
              fi
            else
              range="${before_sha}..${after_sha}"
            fi
          fi

          echo "range=${range}" >> "$GITHUB_OUTPUT"
          echo "Using commit range: ${range}"

      - name: Check commit subjects in range
        run: |
          python scripts/check_commit_message.py --range "${{ steps.commit_range.outputs.range }}"