Add support for building with kokkos in actions

.github/workflows/cmake.yml

@@ -11,29 +11,52 @@ jobs:
     strategy:
       matrix:
         compiler: [g++, clang++]
+        kokkos: [on, off]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
+      with:
+        path: omega_h
 
-    - name: Create Build Environment
-      run: cmake -E make_directory ${{runner.workspace}}/build
+    - uses: actions/checkout@v4
+      if: ${{ matrix.kokkos == 'on' }}
+      with:
+        repository: kokkos/kokkos
+        path: kokkos
+
+    - name: Configure Kokkos
+      if: ${{ matrix.kokkos == 'on' }}
+      shell: bash
+      working-directory: ${{runner.workspace}}/omega_h/kokkos
+      run: cmake .
+           -Bbuild
+           -DCMAKE_CXX_COMPILER=${{ matrix.compiler }}
+           -DCMAKE_INSTALL_PREFIX=build/install
+
+    - name: Build Kokkos
+      if: ${{ matrix.kokkos == 'on' }}
+      shell: bash
+      run: cmake --build $GITHUB_WORKSPACE/kokkos/build --target install
 
     - name: Configure CMake
       shell: bash
-      working-directory: ${{runner.workspace}}/build
-      run: cmake $GITHUB_WORKSPACE
+      working-directory: ${{runner.workspace}}/omega_h/omega_h
+      run: cmake .
+           -Bbuild
            -DCMAKE_CXX_COMPILER=${{ matrix.compiler }}
            -DCMAKE_VERBOSE_MAKEFILE=on
            -DOmega_h_USE_MPI=off
            -DOmega_h_USE_CUDA=off
+           -DOmega_h_USE_Kokkos=${{ matrix.kokkos }}
+           -DKokkos_PREFIX=$GITHUB_WORKSPACE/kokkos/build/install
            -DBUILD_TESTING=ON
 
     - name: Build
-      working-directory: ${{runner.workspace}}/build
+      working-directory: ${{runner.workspace}}/omega_h/omega_h/build
       shell: bash
       run: cmake --build .
 
     - name: Test
-      working-directory: ${{runner.workspace}}/build
+      working-directory: ${{runner.workspace}}/omega_h/omega_h/build
       shell: bash
       run: ctest