preprocessing.yml

# Workflow to run Fortran pre-processor checks on source
name: Preprocessing

on:
  # Triggers the workflow on pushes to the "main" branch, i.e., PR merges
  push:
    branches: [ "main" ]

  # Triggers the workflow on pushes to open pull requests with Fortran changes
  pull_request:
    paths:
      - '.github/workflows/preprocessing.yml'
      - 'ftorch_tensor.f*'
      - 'ftorch_test_utils.f*'

# Cancel jobs running if new commits are pushed
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

# Write permissions are not required
permissions: {}

# Workflow run - one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "fypp-checks"
  fypp-checks:
    name: fypp checks

    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Terminate the job if it runs for more than 5 minutes
    timeout-minutes: 5

    steps:
      - name: Checkout FTorch repository
        with:
          persist-credentials: true
        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0

      - name: Setup Python
        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6
        with:
          python-version: '3.13'  # Use 3.13 as no PyTorch wheels for 3.14 yet.

      - name: Install fypp, the Fortran pre-processor
        run: pip install --group preproc

      - name: Check ftorch_tensor.fypp matches ftorch_tensor.f90
        run: |
          fypp src/ftorch_tensor.fypp src/temp.f90_temp
          if ! diff -q src/ftorch_tensor.f90 src/temp.f90_temp; then
            echo "Error: The code in ftorch_tensor.f90 does not match that expected from ftorch_tensor.fypp."
            echo "Please re-run fypp on ftorch_tensor.fypp to ensure consistency and re-commit."
            exit 1
          else
            exit 0
          fi

      - name: Check ftorch_test_utils.fypp matches ftorch_test_utils.f90
        run: |
          fypp src/ftorch_test_utils.fypp src/temp.f90_temp
          if ! diff -q src/ftorch_test_utils.f90 src/temp.f90_temp; then
            echo "Error: The code in ftorch_test_utils.f90 does not match that expected from ftorch_test_utils.fypp."
            echo "Please re-run fypp on ftorch_test_utils.fypp to ensure consistency and re-commit."
            exit 1
          else
            exit 0
          fi