Set `QT_QPA_PLATFORM` env variable

.github/workflows/ci.yml

@@ -74,6 +74,8 @@ jobs:
       - run: 'source /opt/ros/humble/setup.bash && echo AMENT_PREFIX_PATH=${AMENT_PREFIX_PATH} >> "$GITHUB_ENV"'
       - name: "Rust ROS2 Bridge example"
         timeout-minutes: 30
+        env:
+          QT_QPA_PLATFORM: offscreen
         run: |
           source /opt/ros/humble/setup.bash && ros2 run turtlesim turtlesim_node &&
           cargo run --example rust-ros2-dataflow --features="ros2-examples"
@@ -108,6 +110,8 @@ jobs:
       - run: 'source /opt/ros/humble/setup.bash && echo AMENT_PREFIX_PATH=${AMENT_PREFIX_PATH} >> "$GITHUB_ENV"'
       - name: "python-ros2-dataflow"
         timeout-minutes: 30
+        env:
+          QT_QPA_PLATFORM: offscreen
         run: |
           source /opt/ros/humble/setup.bash && ros2 run turtlesim turtlesim_node &
           cargo run --example python-ros2-dataflow --features="ros2-examples"
@@ -145,7 +149,7 @@ jobs:
           dora-cli list
 
           # Test Rust template Project
-          dora-cli new test_rust_project --internal-create-with-path-dependencies 
+          dora-cli new test_rust_project --internal-create-with-path-dependencies
           cd test_rust_project
           cargo build --all
           dora-cli start dataflow.yml --name ci-rust-test