format.yml

name: Format check

on:
  pull_request:
    branches:
      - main
    paths:
      - '**.py'

jobs:
  generate:
    runs-on: ubuntu-latest
    outputs:
      added: ${{ steps.git-diff-filter.outputs.added }}
      changed: ${{ steps.git-diff-filter.outputs.changed }}
    name: Detect added and changed files

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: GrantBirki/git-diff-action@v2
        id: git-diff-action
        with:
          base_branch: origin/main
          search_path: '**.py'
          git_options: '--no-color --full-index --unified=0'
          json_diff_file_output: diff.json
          # do not print any diff output to the console (safety first)
          file_output_only: true

      - name: Filter json diff
        id: git-diff-filter
        env:
          JSON_DIFF: ${{ steps.git-diff-action.outputs.json-diff-path }}
        run: |
          # Filter files that only have deletions
          added=$(cat $JSON_DIFF | jq -c -r '.files | map(select(.type == "AddedFile"))')
          echo "added=$added" >> $GITHUB_OUTPUT
          changed=$(cat $JSON_DIFF | jq -c -r '.files | map(select(.type == "ChangedFile")) | map(select(.chunks[].changes[].type == "AddedLine"))')
          echo "changed=$changed" >> $GITHUB_OUTPUT

  check-added:
    needs: generate
    if: ${{ needs.generate.outputs.added != '[]' }}
    runs-on: ubuntu-latest
    strategy:
      matrix:
        added: ${{ fromJSON(needs.generate.outputs.added) }}
    name: Format check (${{ matrix.added.path }})
    steps:
      - uses: astral-sh/ruff-action@v1
        with:
          args: "format --check --diff"

  # check-changed:
  #   needs: generate
  #   runs-on: ubuntu-latest
  #   strategy:
  #     matrix: ${{ fromJSON(needs.generate.outputs.matrix) }}
  #   name: Print diff (${{ matrix.path }})
  #   steps:
  #     - name: Print json diff
  #       run: |
  #         echo "${{ matrix.path }}"