format.yml

name: Format

on:
  push:
    branches: [ main ]
    paths:
      - "**.nix"

      - ".github/workflows/format.yml"
  workflow_dispatch:

jobs:
  nix:
    name: Nix files

    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.PUSH_TOKEN }}

      - name: Set Git user info
        run: |
          git config user.name 'github-actions[bot]'
          git config user.email 'github-actions[bot]@users.noreply.github.com'

      - name: Get short revision
        id: rev
        run:
          echo "rev=$(git rev-parse --short HEAD)" >> "$GITHUB_OUTPUT"

      - name: Install Nix
        uses: cachix/install-nix-action@V27

      - name: Format changes
        run: |
          nix fmt

      - name: Commit changes
        run: |
          if ! git diff --color=always --exit-code; then
            git commit -am "style: format ${{ steps.rev.outputs.rev }}"
            git push
          fi