add installation script

.github/workflows/ci.yml

@@ -26,6 +26,8 @@ jobs:
         ros-version: [melodic, noetic]
     steps:
     - uses: actions/checkout@v2
+    - name: Setup
+      run: ./install_dependencies.sh
     - name: Init Workspace
       run: |
         mkdir -p $GITHUB_WORKSPACE/../catkin_ws/src

install_dependencies.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROS_VERSION=$(rosversion -d)
+if [ "$ROS_VERSION" = "noetic" ]; then
+    PYTHON_SUFFIX=3
+else
+    PYTHON_SUFFIX=""
+fi
+
+sudo apt-get update
+sudo apt-get install --no-install-recommends -y \
+    python$PYTHON_SUFFIX-osrf-pycommon \
+    python$PYTHON_SUFFIX-catkin-tools