main.yml

name: Lint

on:
  push:
    branches: [ master ]
  pull_request:
    types: [ opened, reopened, synchronize ]

jobs:
  lint:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout
      uses: actions/checkout@v4
    - name: Fetch head and base refs
      # This is necessary for pre-commit to check the changes in the PR branch
      run: |
        git fetch origin ${{ github.base_ref }}:base_ref
        git fetch origin pull/${{ github.event.pull_request.number }}/head:pr_ref
    - name: Setup Python
      uses: actions/setup-python@v5
      with:
        python-version: 3.12

    - name: Restore cache
      uses: actions/cache@v4
      with:
        path: ~/.cache/pip
        key: ${{ runner.os }}-${{ hashFiles('requirements*') }}

    - name: Install dependencies
      run: |
        python3 -m pip install --upgrade pip wheel
        python3 -m pip install --upgrade --upgrade-strategy eager pre-commit
        sudo apt-get install -y git

    - name: Run pre-commit
      run: |
        pre-commit run --from-ref base_ref --to-ref pr_ref --show-diff-on-failure