Use system-site-packages flag to add system packages to venv

python3-libvirt has some OS level binding, thus it's a little bit complicated to use in venv. Ref: ansible-collections/community.libvirt#71 (comment)

The workaround is to install bindep.txt first so that python3-libvirt is installed, and then create venv with system-site-patckages to have libvirt packages within venv.

Author: amartyasinha

scripts/setup_env

@@ -66,21 +66,20 @@ mkdir -p ${HOME}/ci/yum.repos.d
 cp /etc/ci/mirror_info.sh ${HOME}/ci || touch ${HOME}/ci/mirror_info.sh
 cp -r /opt/yum.repos.d/* ${HOME}/ci/yum.repos.d || cp -r /etc/yum.repos.d/* ${HOME}/ci/yum.repos.d
 
+# Run bindep
+"${PIP}" install pip setuptools bindep --upgrade
+"${PROJECT_DIR}/scripts/bindep-install"
 
 case ${USE_VENV} in
     y|yes|true):
         # Create a virtual env
-        "${PYTHON_EXEC}" -m venv --upgrade-deps "${HOME}/test-python"
+        "${PYTHON_EXEC}" -m venv --upgrade-deps --system-site-packages "${HOME}/test-python"
         if [[ -d "${HOME}/.cache/pip/wheels" ]]; then
             rm -rf "${HOME}/.cache/pip/wheels"
         fi
         ;;
 esac
 
-# Run bindep
-"${PIP}" install pip setuptools bindep --upgrade
-"${PROJECT_DIR}/scripts/bindep-install"
-
 ${PIP} install ${PIP_INSTALL_ARGUMENTS}
 
 # Display list of installed packages with versions (debugging failures)