Update README (#166)

* READMEを整備します

* update english version

* 不必要な表記を削減します

README.en.md

@@ -24,8 +24,8 @@ ROS 2 package suite of Sciurus17.
 
 ## Supported ROS 2 distributions
 
-- Humble
-- Jazzy
+- [Humble](https://github.com/rt-net/sciurus17_ros/tree/humble)
+- [Jazzy](https://github.com/rt-net/sciurus17_ros/tree/jazzy)
 
 ### ROS 1
 
@@ -47,14 +47,11 @@ ROS 2 package suite of Sciurus17.
 ### Build from source
 
 ```sh
-# Setup ROS environment
-source /opt/ros/jazzy/setup.bash
-
 # Download packages
 mkdir -p ~/ros2_ws/src
 cd ~/ros2_ws/src
-git clone -b ros2 https://github.com/rt-net/sciurus17_ros.git
-git clone -b ros2 https://github.com/rt-net/sciurus17_description.git
+git clone -b $ROS_DISTRO https://github.com/rt-net/sciurus17_ros.git
+git clone -b $ROS_DISTRO https://github.com/rt-net/sciurus17_description.git
 
 # Install dependencies
 rosdep install -r -y -i --from-paths .

README.md

@@ -25,8 +25,8 @@ ROS 2 package suite of Sciurus17.
 
 ## Supported ROS 2 distributions
 
-- Humble
-- Jazzy
+- [Humble](https://github.com/rt-net/sciurus17_ros/tree/humble)
+- [Jazzy](https://github.com/rt-net/sciurus17_ros/tree/jazzy)
 
 ### ROS 1
 
@@ -48,15 +48,11 @@ ROS 2 package suite of Sciurus17.
 ### Build from source
 
 ```sh
-# Setup ROS environment
-source /opt/ros/jazzy/setup.bash
-
 # Download packages
 mkdir -p ~/ros2_ws/src
 cd ~/ros2_ws/src
-git clone -b ros2 https://github.com/rt-net/rt_manipulators_cpp.git
-git clone -b ros2 https://github.com/rt-net/sciurus17_ros.git
-git clone -b ros2 https://github.com/rt-net/sciurus17_description.git
+git clone -b $ROS_DISTRO https://github.com/rt-net/sciurus17_ros.git
+git clone -b $ROS_DISTRO https://github.com/rt-net/sciurus17_description.git
 
 # Install dependencies
 rosdep install -r -y -i --from-paths .