name: Lint

on:
  pull_request:

jobs:
  # Determine what the prettier changes are
  prettier-changes:
    runs-on: ubuntu-latest
    outputs:
      packages: ${{ steps.filter.outputs.changes }}
    steps:
      # Use paths-filter to determine which paths have changes
      # https://github.com/dorny/paths-filter
      - uses: dorny/paths-filter@v2
        id: filter
        with:
          # Format of key: value. When there is a change detected in value, the
          # key will be returned in the output.
          filters: |
            packages/dashboard: packages/dashboard/**
            packages/dnslink-api: packages/dnslink-api/**
            packages/handshake-api: packages/handshake-api/**
            packages/health-check: packages/health-check/**
            packages/website: packages/website/**

  # Determine what the dockerfile changes are
  dockerfile-changes:
    runs-on: ubuntu-latest
    outputs:
      packages: ${{ steps.filter.outputs.changes }}
    steps:
      # Use paths-filter to determine which paths have changes
      # https://github.com/dorny/paths-filter
      - uses: dorny/paths-filter@v2
        id: filter
        with:
          # Format of key: value. When there is a change detected in value, the
          # key will be returned in the output.
          filters: |
            docker/nginx/Dockerfile: docker/nginx/Dockerfile
            docker/sia/Dockerfile: docker/sia/Dockerfile
            packages/dashboard/Dockerfile: packages/dashboard/Dockerfile
            packages/dnslink-api/Dockerfile: packages/dnslink-api/Dockerfile
            packages/handshake-api/Dockerfile: packages/handshake-api/Dockerfile
            packages/health-check/Dockerfile: packages/health-check/Dockerfile
            packages/website/Dockerfile: packages/website/Dockerfile

  # Run the prettier lint if there are changes to any of the prettier packages
  prettier:
    needs: prettier-changes
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        working-directory: ${{ fromJSON(needs.prettier-changes.outputs.packages) }}
    steps:
      - uses: actions/checkout@v2
      - name: Run Prettier Action
        uses: ./.github/actions/prettier
        with:
          working-directory: ${{ matrix.working-directory }}

  # Run the hadolint dockefile lint if there are changes to any of the
  # dockerfiles
  hadolint:
    needs: dockerfile-changes
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        dockerfile: ${{ fromJSON(needs.dockerfile-changes.outputs.packages) }}
    steps:
      - uses: actions/checkout@v3
      - uses: hadolint/hadolint-action@v2.0.0
        with:
          dockerfile: ${{ matrix.dockerfile }}

  # Determine if there are python changes
  python-changes:
    runs-on: ubuntu-latest
    outputs:
      # Check if the changed status of py is true
      updates: steps.changes.outputs.py == 'true'
    steps:
      # Use paths-filter to determine which paths have changes
      # https://github.com/dorny/paths-filter
      - uses: dorny/paths-filter@v2
        id: changes
        with:
          filters: |
            py: "**.py"

  # Run the hadolint dockefile lint if there are changes to any of the
  # dockerfiles
  python-lint:
    needs: python-changes
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Run Black python linter
        if: ${{ needs.python-changes.outputs.updates }}
        uses: ./.github/actions/python-black-lint
      - name: Run Flake8 python linter
        if: ${{ needs.python-changes.outputs.updates }}
        uses: ./.github/actions/python-flake8-lint