Easily switch between ROS1 and ROS2 terminal environments

rs.bash

#!/bin/bash

# This script is meant to be sourced by your bashrc
# It gives you the "rs" function for easily switching between ROS1 and ROS2

rs()
{
  ROS_VER="${1:-1}"

  if [ "$ROS_VER" == "1" ]; then
    clear_ros_env
    # ROS1 env setup goes here
    source /opt/ros/noetic/setup.bash
    
    echo "ROS 1 Environment Sourced"
  elif [ "$ROS_VER" == "2" ]; then
    clear_ros_env
    # ROS2 env setup goes here
    source /opt/ros/foxy/setup.bash

    echo "ROS 2 Environment Sourced"
  else
    echo "Choose ROS version 1 or 2"
  fi
}

clear_ros_env()
{
  for ros_env_var in $(env | grep ROS_ | cut -d "=" -f1); do
    unset "$ros_env_var"
  done
  unset CMAKE_PREFIX_PATH
  unset COLCON_PREFIX_PATH
}