Add .github/workflows/build_demos.yml (#3652)

Author: Wovchena

.github/workflows/build_demos.yml

@@ -0,0 +1,54 @@
+name: Demos
+
+on:
+  pull_request:
+    branches: '**'
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        submodules: recursive
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v3
+      with:
+        python-version: "3.8"
+    - name: python -m pip install --upgrade pip && python -m pip install numpy
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install numpy
+    - name: Download OpenVINO
+      run: |
+        wget https://storage.openvinotoolkit.org/repositories/openvino/packages/2022.3/linux/l_openvino_toolkit_ubuntu20_2022.3.0.9052.9752fafe8eb_x86_64.tgz
+        tar xf l_openvino_toolkit_ubuntu20_2022.3.0.9052.9752fafe8eb_x86_64.tgz
+        sudo l_openvino_toolkit_ubuntu20_2022.3.0.9052.9752fafe8eb_x86_64/install_dependencies/install_openvino_dependencies.sh
+    - name: Cache OpenCV
+      id: opencv-cache
+      uses: actions/cache@v3
+      with:
+        path: ${{ github.workspace }}/opencv
+        key: ${{ runner.os }}-opencv-cache
+    - if: ${{ steps.opencv-cache.outputs.cache-hit != 'true' }}
+      name: Checlout OpenCV
+      uses: actions/checkout@v3
+      with:
+        repository: opencv/opencv
+        path: opencv
+    - if: ${{ steps.opencv-cache.outputs.cache-hit != 'true' }}
+      name: Compile OpenCV
+      run: |
+        mkdir opencv/build
+        cd opencv/build
+        cmake -DCMAKE_BUILD_TYPE=Release -DWITH_INF_ENGINE=ON -DOpenVINO_DIR=$GITHUB_WORKSPACE/l_openvino_toolkit_ubuntu20_2022.3.0.9052.9752fafe8eb_x86_64/runtime/cmake/ ..
+        cmake --build . -j $((`nproc`*2+2))
+    - name: build_demos.sh
+      run: |
+        source l_openvino_toolkit_ubuntu20_2022.3.0.9052.9752fafe8eb_x86_64/setupvars.sh
+        OpenCV_DIR=$GITHUB_WORKSPACE/opencv/build ./demos/build_demos.sh -DENABLE_PYTHON=y