Set up bash completion for occ

[simonspa]

This is something I can't even get to work manually. I guess the culprit is that www-data needs to have a profile, as noted in the docs:

Command autocompletion currently only works if the user you use to execute the occ commands has a profile. www-data in most cases is nologon and therefor cannot use this feature.

https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/occ_command.html#enabling-autocompletion

I'd be very hesitant to change that user account...

[nkakouros]

What we could do is:

• create a /usr/bin/occ symlink to the occ script
• create an /etc/profile.d/occ.sh script that contains the lines that setup autocompletion from the nextcloud docs

Then, if the user wants to work with the occ tool, they can do:

sudo su www-data -l -s /bin/bash

And they will have autocompletion. We could mention this in the README.

[simonspa]

sudo su www-data -l -s /bin/bash

<- that's exactly the problem - www-data is a user without profile, so we cannot su into it because it can never open a terminal session:

# sudo su www-data
This account is currently not available.

[nkakouros]

If you supply -s /bin/bash then it will use a shell for the www-data user to use.