pr_precommit.yml

name: PR pre-commit

on:
  push:
    branches:
      - main
  pull_request_target:
    branches:
      - main

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
  cancel-in-progress: true

jobs:
  pre-commit:
    runs-on: ubuntu-20.04

    steps:
      - uses: actions/checkout@v4

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

      - uses: tj-actions/changed-files@v45
        id: changed-files

      - name: List changed files
        run: echo '${{ steps.changed-files.outputs.all_changed_files }}'

      # only check the full repository if PR and correctly labelled
      - if: ${{ github.event_name == 'pull_request_target' && contains(github.event.pull_request.labels.*.name, 'full pre-commit') }}
        name: Full pre-commit
        uses: pre-commit/action@v3.0.1
        with:
          extra_args: --all-files
      - if: ${{ github.event_name != 'pull_request_target' || !contains(github.event.pull_request.labels.*.name, 'full pre-commit') }}
        name: Local pre-commit
        uses: pre-commit/action@v3.0.1
        with:
          extra_args: --files ${{ steps.changed-files.outputs.all_changed_files }}

      # push fixes if pre-commit fails and PR is eligible
      - if: ${{ failure() && github.event_name == 'pull_request_target' && github.event.pull_request.draft == false && !contains(github.event.pull_request.labels.*.name, 'stop pre-commit fixes')}}
        uses: actions/create-github-app-token@v1
        id: app-token
        with:
          app-id: ${{ vars.PR_APP_ID }}
          private-key: ${{ secrets.PR_APP_KEY }}

      - if: ${{ failure() && github.event_name == 'pull_request_target' && !github.event.pull_request.draft && !contains(github.event.pull_request.labels.*.name, 'stop pre-commit fixes') }}
        name: Checkout
        uses: actions/checkout@v4
        with:
          repository: ${{ github.event.pull_request.head.repo.full_name }}
          ref: ${{ github.head_ref }}
          token: ${{ steps.app-token.outputs.token }}

      - if: ${{ failure() && github.event_name == 'pull_request_target' && github.event.pull_request.draft == false && !contains(github.event.pull_request.labels.*.name, 'stop pre-commit fixes')}}
        name: Push pre-commit fixes
        uses: stefanzweifel/git-auto-commit-action@v5
        with:
          commit_message: Automatic `pre-commit` fixes
          commit_user_name: tsml-actions-bot[bot]