Merge pull request IntelRealSense#11 from 130s/installscript_cp10/por_d

[dep install script] 1) cherry-pick IntelRealSense#10, 2) Fix bash issues

.install_dependency.sh

@@ -6,8 +6,9 @@
 # Codes taken from https://github.com/intel-ros/realsense/blob/c5ea27245967e0938f7d10384f4b7279e01000b4/.travis.yml
 # When used on CI sudo is not usually needed but it is most likely needed when used on your local computer.
 
-echo 'deb http://realsense-hw-public.s3.amazonaws.com/Debian/apt-repo xenial main' || sudo tee /etc/apt/sources.list.d/realsense-public.list
-add-apt-repository "deb http://realsense-hw-public.s3.amazonaws.com/Debian/apt-repo xenial main"
+COMMAND="deb http://realsense-hw-public.s3.amazonaws.com/Debian/apt-repo $(lsb_release -sc) main"
+echo $COMMAND | tee /etc/apt/sources.list.d/realsense-public.list
+add-apt-repository "$COMMAND"
 apt-get update -qq
 apt-get install librealsense2-dkms --allow-unauthenticated -y 
 apt-get install librealsense2-dev --allow-unauthenticated -y

.travis.yml

@@ -3,7 +3,7 @@ dist: xenial
 
   # - git clone -v --progress https://github.com/doronhi/realsense.git  # This is Done automatically by TravisCI
 before_install:
-  - ./.install_dependency.sh
+  - sudo ./.install_dependency.sh
 
 install:
   # install ROS: