Build openpilot with webcam support in CI (#2070)

tools/webcam/Dockerfile

@@ -0,0 +1,45 @@
+FROM commaai/openpilot-base:latest
+
+ENV PYTHONUNBUFFERED 1
+ENV PYTHONPATH /tmp/openpilot:${PYTHONPATH}
+
+# install opencv
+RUN export OPENCV_VERSION='4.2.0' && \
+    sudo apt-get -y update && \
+    sudo apt-get install -y build-essential cmake && \
+    sudo apt-get install -y qt5-default libvtk6-dev && \
+    sudo apt-get install -y libdc1394-22-dev libavcodec-dev libavformat-dev libswscale-dev \
+                            libtheora-dev libvorbis-dev libxvidcore-dev libx264-dev yasm \
+                            libopencore-amrnb-dev libopencore-amrwb-dev libv4l-dev libxine2-dev && \
+    sudo apt-get install -y libtbb-dev libeigen3-dev && \
+
+    wget https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.tar.gz && \
+    tar -xvf ${OPENCV_VERSION}.tar.gz && rm ${OPENCV_VERSION}.tar.gz && \
+    mv opencv-${OPENCV_VERSION} OpenCV && \
+    cd OpenCV && mkdir build && cd build && \
+    cmake -DWITH_OPENGL=ON -DFORCE_VTK=ON -DWITH_TBB=ON -DWITH_GDAL=ON \
+          -DWITH_XINE=ON -DENABLE_PRECOMPILED_HEADERS=OFF .. && \
+    make -j8 && \
+    sudo make install && \
+    sudo ldconfig
+
+
+RUN mkdir -p /tmp/openpilot
+
+COPY SConstruct \
+     .pylintrc \
+     .pre-commit-config.yaml \
+     /tmp/openpilot/
+
+COPY ./pyextra /tmp/openpilot/pyextra
+COPY ./phonelibs /tmp/openpilot/phonelibs
+COPY ./laika /tmp/openpilot/laika
+COPY ./laika_repo /tmp/openpilot/laika_repo
+COPY ./rednose /tmp/openpilot/rednose
+COPY ./tools /tmp/openpilot/tools
+COPY ./release /tmp/openpilot/release
+COPY ./common /tmp/openpilot/common
+COPY ./opendbc /tmp/openpilot/opendbc
+COPY ./cereal /tmp/openpilot/cereal
+COPY ./panda /tmp/openpilot/panda
+COPY ./selfdrive /tmp/openpilot/selfdrive

tools/webcam/README.md

@@ -27,8 +27,7 @@ cd ~/openpilot
 ```
 - check out selfdrive/camerad/cameras/camera_webcam.cc lines 72 and 146 before building if any camera is upside down
 ```
-scons use_webcam=1
-touch prebuilt
+USE_WEBCAM=1 scons -j$(nproc)
 ```
 
 ## Connect the hardware