name: Black

on:
  workflow_dispatch: # Activate this workflow manually
  pull_request:
  push:
    branches:
      # release branches have the form v1.9.x
      - 'v[0-9].*[0-9].x'

jobs:

  black:
    runs-on: ubuntu-latest
    steps:

      - uses: actions/checkout@v2

      - name: Setup Python
        uses: ./.github/actions/python_cache/

      - name: Install Haystack
        run: |
          pip install --upgrade pip
          pip install .[dev]

      - name: Check status
        run: |
          if ! black . --check; then
            git status
            echo "###################################################################################################"
            echo "# "
            echo "# CHECK FAILED! Black found issues with your code formatting."
            echo "# "
            echo "# Either:"
            echo "# 1. Run Black locally before committing:"
            echo "# "
            echo "#     pip install black==22.6.0"
            echo "#     black ."
            echo "# "
            echo "# 2. Install the pre-commit hook:"
            echo "# "
            echo "#     pre-commit install --hook-type pre-push"
            echo "# "
            echo "# 3. See https://github.com/deepset-ai/haystack/blob/main/CONTRIBUTING.md for help."
            echo "# "
            echo "# If you have further problems, please open an issue: https://github.com/deepset-ai/haystack/issues"
            echo "# "
            echo "##################################################################################################"
            exit 1
          fi