qa: install clingo-cffi from pip (#23163)

Clingo has been released on PyPI, so there
are no more concerns on our CI depending
on pypy.test for installing the wheel.

Apparently we have parts of Spack which
are not compatible with kcov > 3.4

.github/workflows/unit_tests.yaml

@@ -293,26 +293,57 @@ jobs:
   clingo-cffi:
     needs: [ validate, style, documentation, changes ]
     runs-on: ubuntu-latest
-    container: spack/github-actions:clingo-cffi
     steps:
-      - name: Run unit tests
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - uses: actions/setup-python@v2
+      with:
+        python-version: 3.9
+    - name: Install System packages
       run: |
-          whoami && echo PWD=$PWD && echo HOME=$HOME && echo SPACK_TEST_SOLVER=$SPACK_TEST_SOLVER
+          sudo apt-get -y update
-          python3 -c "import clingo; print(hasattr(clingo.Symbol, '_rep'), clingo.__version__)"
+          # Needed for unit tests
-          git clone https://github.com/spack/spack.git && cd spack
+          sudo apt-get install -y coreutils gfortran graphviz gnupg2 mercurial
-          git fetch origin ${{ github.ref }}:test-branch
+          sudo apt-get install -y ninja-build patchelf
-          git checkout test-branch
+          # Needed for kcov
-          . share/spack/setup-env.sh
+          sudo apt-get -y install cmake binutils-dev libcurl4-openssl-dev
-          spack compiler find
+          sudo apt-get -y install zlib1g-dev libdw-dev libiberty-dev
-          spack solve mpileaks%gcc
+    - name: Install kcov for bash script coverage
-          if [ "${{ needs.changes.outputs.with_coverage }}" == "true" ]
+      if: ${{ needs.changes.outputs.with_coverage == 'true' }}
-          then
+      env:
-            coverage run $(which spack) unit-test -v -x
+          KCOV_VERSION: 34
+      run: |
+          KCOV_ROOT=$(mktemp -d)
+          wget --output-document=${KCOV_ROOT}/${KCOV_VERSION}.tar.gz https://github.com/SimonKagstrom/kcov/archive/v${KCOV_VERSION}.tar.gz
+          tar -C ${KCOV_ROOT} -xzvf ${KCOV_ROOT}/${KCOV_VERSION}.tar.gz
+          mkdir -p ${KCOV_ROOT}/build
+          cd ${KCOV_ROOT}/build && cmake -Wno-dev ${KCOV_ROOT}/kcov-${KCOV_VERSION} && cd -
+          make -C ${KCOV_ROOT}/build && sudo  make -C ${KCOV_ROOT}/build install
+    - name: Install Python packages
+      run: |
+          pip install --upgrade pip six setuptools codecov coverage clingo
+    - name: Setup git configuration
+      run: |
+          # Need this for the git tests to succeed.
+          git --version
+          . .github/workflows/setup_git.sh
+    - name: Run unit tests (full suite with coverage)
+      if: ${{ needs.changes.outputs.with_coverage == 'true' }}
+      env:
+          COVERAGE: true
+          SPACK_TEST_SOLVER: clingo
+      run: |
+          share/spack/qa/run-unit-tests
           coverage combine
           coverage xml
-          else
+    - name: Run unit tests (reduced suite without coverage)
-            $(which spack) unit-test -m "not maybeslow" -k "package_sanity"
+      if: ${{ needs.changes.outputs.with_coverage == 'false' }}
-          fi
+      env:
+          ONLY_PACKAGES: true
+          SPACK_TEST_SOLVER: clingo
+      run: |
+          share/spack/qa/run-unit-tests
     - uses: codecov/codecov-action@v1
       if: ${{ needs.changes.outputs.with_coverage == 'true' }}
       with: