name: Linters

on:
  pull_request:
  merge_group:

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

jobs:
  nph:
    name: NPH
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 2  # In PR, has extra merge commit: ^1 = PR, ^2 = base

      - name: Setup NPH
        # Pin nph to a specific version to avoid sudden style differences.
        # Updating nph version should be accompanied with running the new version on the fluffy directory.
        run: |
          VERSION="v0.5.1"
          ARCHIVE="nph-linux_x64.tar.gz"
          curl -L "https://github.com/arnetheduck/nph/releases/download/${VERSION}/${ARCHIVE}" -o ${ARCHIVE}
          tar -xzf ${ARCHIVE}

      - name: Check style
        run: |
          shopt -s extglob  # Enable extended globbing
          ./nph examples libp2p tests tools *.@(nim|nims|nimble)
          git diff --exit-code