name: nf-core linting
# This workflow is triggered on pushes and PRs to the repository.
# It runs the `nf-core lint` tests to ensure that the module code meets the nf-core guidelines
on: [push, pull_request]

jobs:
  changes:
    name: Check for changes
    runs-on: ubuntu-latest
    outputs:
      # Expose matched filters as job 'modules' output variable
      modules: ${{ steps.filter.outputs.changes }}
    steps:
      - uses: actions/checkout@v2

      - uses: dorny/paths-filter@v2
        id: filter
        with:
          filters: 'tests/config/pytest_software.yml'

  lint:
    runs-on: ubuntu-20.04
    env:
      NXF_VER: 21.03.0-edge

    name: ${{ matrix.tags }}
    needs: changes
    if: needs.changes.outputs.modules != '[]'
    strategy:
      fail-fast: false
      matrix:
        tags: ['${{ fromJson(needs.changes.outputs.modules) }}']
    steps:
      - uses: actions/checkout@v2

      - name: Set up Python
        uses: actions/setup-python@v2
        with:
          python-version: "3.x"

      - uses: actions/cache@v2
        id: cache-pip
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip

      - name: Install pip
        if: steps.cache-pip.outputs.cache-hit != 'true'
        run: python -m pip install --upgrade pip

        # FIXME: Remove this when nf-core modules lint stabilizes and install stable release
      - name: Install nf-core tools development version
        if: steps.cache-pip.outputs.cache-hit != 'true'
        run: python -m pip install --upgrade --force-reinstall git+https://github.com/nf-core/tools.git@dev

      - name: Install Nextflow
        env:
          CAPSULE_LOG: none
        run: |
          wget -qO- get.nextflow.io | bash
          sudo mv nextflow /usr/local/bin/

      - name: Lint ${{ matrix.tags }}
        run: nf-core modules lint . -t ${{ matrix.tags }}

      - uses: actions/cache@v2
        with:
          path: /usr/local/bin/nextflow
          key: ${{ runner.os }}
          restore-keys: |
            ${{ runner.os }}