set keyring for snapshots.ros.org

.travis.sh

@@ -58,9 +58,14 @@ travis_time_start setup_ros
 export CI_SOURCE_PATH=$(pwd)
 export REPOSITORY_NAME=${PWD##*/}
 echo "Testing branch $TRAVIS_BRANCH of $REPOSITORY_NAME"
-sudo -E sh -c 'echo "deb http://packages.ros.org/ros-testing/ubuntu ${DISTRO} main" > /etc/apt/sources.list.d/ros-latest.list'
-sudo -E sh -c 'echo "deb http://snapshots.ros.org/hydro/final/ubuntu ${DISTRO} main" > /etc/apt/sources.list.d/ros-latest.list'
-wget http://packages.ros.org/ros.key -O - | sudo apt-key add -
+if [ $ROS_DISTRO == "hydro" ]   # hydro is one of EOL distros so we cannot use packages.ros.org
+then
+    sudo -E sh -c 'echo "deb http://snapshots.ros.org/${ROS_DISTRO}/final/ubuntu ${DISTRO} main" > /etc/apt/sources.list.d/ros-latest.list'
+    sudo apt-key adv --keyserver 'hkp://keyserver.ubuntu.com:80' --recv-key AD19BAB3CBF125EA
+elif
+    sudo -E sh -c 'echo "deb http://packages.ros.org/ros-shadow-fixed/ubuntu ${DISTRO} main" > /etc/apt/sources.list.d/ros-latest.list'
+    wget http://packages.ros.org/ros.key -O - | sudo apt-key add -
+fi
 sudo apt-get update -qq
 sudo apt-get install dpkg -y # for https://github.com/ros/rosdistro/issues/19481