pre-commit.yml

name: pre-commit

on:
  pull_request:
  push:
    branches: [master]

jobs:
  pre-commit:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          # Need full history so the diff range below can resolve the
          # base/before SHA against actual commits, not just HEAD.
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Install pre-commit
        run: pip install pre-commit

      - name: Install image tooling (jpegoptim, oxipng, svgo)
        run: |
          sudo apt-get update
          sudo apt-get install -y jpegoptim
          cargo install oxipng --locked
          npm install -g svgo

      - name: Run pre-commit on the PR's changed files
        if: github.event_name == 'pull_request'
        run: |
          pre-commit run --show-diff-on-failure \
            --from-ref ${{ github.event.pull_request.base.sha }} \
            --to-ref ${{ github.event.pull_request.head.sha }}

      - name: Run pre-commit on the push's changed files
        if: github.event_name == 'push'
        run: |
          pre-commit run --show-diff-on-failure \
            --from-ref ${{ github.event.before }} \
            --to-ref ${{ github.sha }}