name: Run regression tests

on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master

env:
  WERROR: 'n'

jobs:
  prepare_matrix:
    name: Prepare kernel matrix
    runs-on: ubuntu-latest
    outputs:
      regression: ${{ steps.matrix.outputs.regression }}
    steps:
      - name: Checkout code
        uses: actions/checkout@main

      - name: Resolve kernel matrix
        id: matrix
        shell: bash
        run: |
          matrix="$(bash scripts/kernel-matrix regression)"
          printf 'regression=%s\n' "${matrix}" >>"${GITHUB_OUTPUT}"

  regression_tests:
    name: ${{matrix.version}}
    needs: prepare_matrix
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix: ${{ fromJSON(needs.prepare_matrix.outputs.regression) }}
    steps:
      - name: Checkout code
        uses: actions/checkout@main

      - name: Install libelf-dev
        run: |
          sudo apt-get update
          sudo apt-get install -y libelf-dev libsqlite3-dev

      - name: Install sparse
        run: |
          sudo apt-get install sparse

      - name: Install smatch
        run: |
          git clone https://github.com/error27/smatch.git
          cd smatch
          make -j
          sudo BINDIR=/bin SHAREDIR=/home/runner/share make install

      - name: Run regression tests
        run: |
          err=0
          version="${{matrix.version}}"
          workdir="/tmp/scst-${version}"
          out="output.txt"

          ./scripts/run-regression-tests -l -q -d "${workdir}" "${version}-nc-ns-nm" | tee "${out}"

          if ! grep -q "Compiling the patched kernel" "${out}"; then
            echo "::error title=Regression tests::run-regression-tests failed"
            err=1
          else
            if grep -A1 "Compiling the patched kernel" "${out}" | grep -E -q "FAILED|[1-9][0-9]* errors"; then
              echo "::error title=Regression tests::Regression test failed"
              err=1
            else
              echo "::notice title=Regression tests::Succeeded"
            fi

            f=( "${workdir}"/compilation-*-output.txt )
            echo
            echo "===== $(basename "${f[0]}") ====="
            cat "${f[0]}"
          fi

          rm -rf "${workdir}"
          rm -f "${out}"

          exit $err