user408041 user408041 - 2 months ago 17
Bash Question

Source files in a bash script

I am using two versions of ROS next to each other. To use one I have to source some environment variables for the specific version. I would like to create a script that does this.
But if I create a script like below the variables are not set, they are probably set in a subshell. How can I source the files to the main terminal shell?

source.sh:

source /opt/ros/fuerte/setup.bash;
source ~/fuerte_workspace/setup.bash;


Here is how i am calling source.sh:

./source.sh
# This does not echo anything, but I expect it should
echo $ros_config





Update: By sourcing source.sh as suggested in the answer, I can now see the variables being set.

source ./source.sh
# This works now
echo $ros_config

Answer

Execute Shell Script Using . ./ (dot space dot slash)

While executing the shell script using “dot space dot slash”, as shown below, it will execute the script in the current shell without forking a sub shell.

$ . ./setup.bash

In other words, this executes the commands specified in the setup.bash in the current shell, and prepares the environment for you.