refactor(template_ws): Change gazebo cache directory to volume mount

Fixes: #31

Author: j3soon

scripts/create_workspace.sh

@@ -35,8 +35,6 @@ cp -r "${TEMPLATE_WS_DIR}" "${NEW_WS_DIR}"
 rm -rf "${NEW_WS_DIR}/.vscode"
 rm -rf "${NEW_WS_DIR}/build" "${NEW_WS_DIR}/install" "${NEW_WS_DIR}/log"
 rm -rf "${NEW_WS_DIR}/README.md"
-rm -rf "${NEW_WS_DIR}/docker/cache/.gazebo/*"
-touch "${NEW_WS_DIR}/docker/cache/.gazebo/.gitkeep"
 echo "# ${NEW_WS_NAME_UNDERSCORE}" > "${NEW_WS_DIR}/README.md"
 
 # Replace the "template_ws" with new workspace name in each file.

template_ws/docker/Dockerfile

@@ -57,8 +57,9 @@ RUN --mount=type=cache,target=/var/cache/apt \
 
 # TODO: Add more commands here
 
-COPY .bashrc /home/$USERNAME/.bashrc
-
 USER $USERNAME
+COPY .bashrc /home/$USERNAME/.bashrc
+# Create Gazebo cache directory with correct ownership to avoid permission issues after volume mount
+RUN mkdir /home/$USERNAME/.gazebo
 ENTRYPOINT []
 CMD ["/bin/bash"]

template_ws/docker/cache/.gazebo/.gitkeep

@@ -51,6 +51,10 @@ services:
       # - /dev:/dev
       # Mount Gazebo models directory to reuse models downloaded during first launch.
       # Reference: https://answers.ros.org/question/365658
-      - ./cache/.gazebo:/home/user/.gazebo
+      # Note that this volume is shared among all workspaces.
+      - gazebo-cache:/home/user/.gazebo
       # Mount root workspace to allow easy access to all workspaces.
       - ../..:/home/ros2-essentials
+volumes:
+  gazebo-cache:
+    name: ros2-gazebo-cache