name: pre-commit

on:
  workflow_dispatch:
  pull_request:
    branches:
      - pybind11
  push:
    branches:
      - pybind11

jobs:
  pre-commit:
    runs-on: ubuntu-22.04
    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0

    - uses: actions/setup-python@v5
      with:
        python-version: '3.10'

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

    - name: Run pre-commit on changed files
      shell: bash
      run: |
        if [[ "${{ github.event_name }}" == "pull_request" ]]; then
          base_ref="${{ github.event.pull_request.base.sha }}"
        elif [[ -n "${{ github.event.before }}" && ! "${{ github.event.before }}" =~ ^0+$ ]]; then
          base_ref="${{ github.event.before }}"
        else
          base_ref="$(git rev-parse HEAD~1)"
        fi

        pre-commit run --show-diff-on-failure --color=always --from-ref "$base_ref" --to-ref "${{ github.sha }}"