adds a CI job: test_opencl

Author: kaushikcfd

.github/workflows/ci.yml

@@ -104,3 +104,69 @@ jobs:
           jekyll: false
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  test_opencl:
+    runs-on: ubuntu-latest
+    env:
+      CC: mpicc
+      PETSC_DIR: ${{ github.workspace }}/petsc
+      PETSC_ARCH: default
+      PETSC_CONFIGURE_OPTIONS: --with-debugging=1 --with-shared-libraries=1 --with-c2html=0 --with-fortran-bindings=0 --with-opencl=1 --download-viennacl --with-viennacl=1
+
+    steps:
+      - name: Install system dependencies
+        shell: bash
+        run: |
+          sudo apt update
+          sudo apt install build-essential mpich libmpich-dev \
+              libblas-dev liblapack-dev gfortran
+          sudo apt install ocl-icd-opencl-dev pocl-opencl-icd
+
+      - name: Set correct Python version
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.10'
+
+      - name: Clone PETSc
+        uses: actions/checkout@v2
+        with:
+          repository: firedrakeproject/petsc
+          path: ${{ env.PETSC_DIR }}
+
+      - name: Build and install PETSc
+        shell: bash
+        working-directory: ${{ env.PETSC_DIR }}
+        run: |
+          ./configure ${PETSC_CONFIGURE_OPTIONS}
+          make
+
+      - name: Build and install petsc4py
+        shell: bash
+        working-directory: ${{ env.PETSC_DIR }}/src/binding/petsc4py
+        run: |
+          python -m pip install --upgrade cython numpy
+          python -m pip install --no-deps .
+
+      - name: Checkout PyOP2
+        uses: actions/checkout@v2
+        with:
+          path: PyOP2
+
+      - name: Install PyOP2
+        shell: bash
+        working-directory: PyOP2
+        run: |
+          python -m pip install pip==20.2  # pip 20.2 needed for loopy install to work.
+
+          # xargs is used to force installation of requirements in the order we specified.
+          xargs -l1 python -m pip install < requirements-ext.txt
+          xargs -l1 python -m pip install < requirements-git.txt
+          python -m pip install pulp
+          python -m pip install -U flake8
+          python -m pip install pyopencl
+          python -m pip install .
+
+      - name: Run tests
+        shell: bash
+        working-directory: PyOP2
+        run: pytest test -v --tb=native