Add github actions

.github/workflows/cmake.yml

@@ -0,0 +1,101 @@
+name: CMake
+
+on: [push, pull_request]
+
+env:
+  BUILD_TYPE: RelWithDebInfo
+
+jobs:
+  build-mdspan:
+    runs-on: ubuntu-latest
+
+    steps:
+
+    - id: get-sha
+      run: echo ::set-output name=sha::$( curl https://api.github.com/repos/kokkos/mdspan/git/ref/heads/stable | jq .object.sha | tr -d '"' )
+
+    - name: Determine whether mdspan needs to be rebuilt
+      id: cache-mdspan
+      uses: actions/cache@v2
+      with:
+        path: ${{github.workspace}}/mdspan-install
+        key: mdspan-${{ steps.get-sha.outputs.sha }}
+
+    - name: Create Build Environment
+      if: steps.cache-mdspan.outputs.cache-hit != 'true'
+      run: cmake -E make_directory ${{github.workspace}}/mdspan-build
+
+    - name: Check Out
+      if: steps.cache-mdspan.outputs.cache-hit != 'true'
+      uses: actions/checkout@v2
+      with:
+        repository: kokkos/mdspan
+        path: ${{github.workspace}}/mdspan-src
+
+    - name: Configure CMake
+      if: steps.cache-mdspan.outputs.cache-hit != 'true'
+      shell: bash
+      working-directory: ${{github.workspace}}/mdspan-build
+      run: cmake $GITHUB_WORKSPACE/mdspan-src -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/mdspan-install
+
+    - name: Build
+      if: steps.cache-mdspan.outputs.cache-hit != 'true'
+      shell: bash
+      working-directory: ${{github.workspace}}/mdspan-build
+      run: make
+
+    - name: Install
+      if: steps.cache-mdspan.outputs.cache-hit != 'true'
+      shell: bash
+      working-directory: ${{github.workspace}}/mdspan-build
+      run: make install
+
+    - name: Upload
+      uses: actions/upload-artifact@v2
+      with:
+        name: mdspan
+        path: ${{github.workspace}}/mdspan-install
+
+  build-mdarray:
+    runs-on: ubuntu-latest
+    needs: build-mdspan
+
+    steps:
+
+    - name: Download mdspan
+      if: steps.cache-mdspan.outputs.cache-hit != 'true'
+      uses: actions/download-artifact@v2
+      with:
+        name: mdspan
+        path: ${{github.workspace}}/mdspan-install
+
+    - name: Install gtest manually
+      run: sudo apt-get install libgtest-dev && cd /usr/src/gtest && sudo cmake CMakeLists.txt && sudo make && sudo cp lib/*.a /usr/lib && sudo ln -s /usr/lib/libgtest.a /usr/local/lib/libgtest.a && sudo ln -s /usr/lib/libgtest_main.a /usr/local/lib/libgtest_main.a
+
+    - name: Create Build Environment
+      run: cmake -E make_directory ${{github.workspace}}/mdarray-build
+
+    - name: Check Out
+      uses: actions/checkout@v2
+      with:
+        path: ${{github.workspace}}/mdarray-src
+
+    - name: Configure CMake
+      shell: bash
+      working-directory: ${{github.workspace}}/mdarray-build
+      run: cmake $GITHUB_WORKSPACE/mdarray-src -Dmdspan_DIR=$GITHUB_WORKSPACE/mdspan-install/lib/cmake/mdspan -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DMDARRAY_ENABLE_TESTS=ON -DMDARRAY_ENABLE_EXAMPLES=ON -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/mdarray-install
+
+    - name: Build
+      shell: bash
+      working-directory: ${{github.workspace}}/mdarray-build
+      run: make
+
+    - name: Test
+      working-directory: ${{github.workspace}}/mdarray-build
+      shell: bash
+      run: ctest
+
+    - name: Install
+      shell: bash
+      working-directory: ${{github.workspace}}/mdarray-build
+      run: make install