Issue
I'm a novice in shell scripting, but I want to make a bash script for activate/deactivate a virtual enviroment using virtualenv. Then I want to use this script like a service in Ubuntu copying it inside /etc/init.d folder.
In my script, I have a variable like this:
VENV=/opt/odoo/odoo_server/venv_oddo/bin
This variable represents the bin path in my virtual enviroment.
Inside the script, I can activate the virtual enviroment with this statement:
. ${VENV}/activate
This is possible because activate is a file inside bin directory in the virtual enviroment.
But I don't know the statement to use in my script to deactivate my virtual enviroment.
I can't do this: . ${VENV}/deactivate
The problem is that doesn't exist a file named deactivate, but deactivated is a function inside the bin/activate file in the virtual enviroment.
Solution
It'll be hard to make a service like that useful.
. ${VENV}/activate # note the dot
or
source ${VENV}/activate
will source the activate script, i.e. run its contents as if they were part of the shell or script where you source them. virtualenvironment's activate is designed for this usage. In contrast, just executing the script normally with
${VENV}/activate # note: NO dot and NO 'source' command
will run its content in a subshell and won't have any useful effect.
However, your service script will already run in a subshell of its own. So except for any python commands you run as part of the service start process, it won't have any effect.
On the plus side, you won't even have to care about de-activating the environment, unless you want to run even more python stuff in the service start process, but outside of your virtualenv.
Answered By - das-g Answer Checked By - Senaida (WPSolving Volunteer)