Errors from selected templated services hide other units

[ballit6782]

It seems that templated services (such as [email protected]) are not handled properly :

On top of showing this error, it hides other selected units.

[isd-project]

Good catch!
Thank you for reporting! 🙏

This is a tricky one. "Technically", this is partially the correct behavior, at least if the unit file is selected last.
I have "fixed" an inconsistency between systemctl and isd in the last commit, but it still won't work as "expected" for you.

You can compare the output with systemctl status [email protected] udisks2.service.
systemd will "stop" outputting status information on the first "error".

Now (working just as systemctl status):

Here the "working unit" -09.service is highlighted / selected last, but the stderr is printed at the top, similar to systemctl.
But if I first select -09.service and then [email protected] then only the error message will be shown:

Possible workarounds would "deviate" from the systemctl behaviour, so I am inclined to leave it as is.
Why would you want to keep the (uninstantiated) template unit in the selection?
I understand that it might be relevant to quickly compare the output of cat but since that is "valid" and produces the correct output, I don't really see a reason to add a potentially complex workaround.

Do you think documenting this behavior would suffice?
I am looking forward to your comments, thanks!

[ballit6782]

Ah right, this happens inside systemd.

I reported it because it was a bit confusing to me, but indeed it's not a very big issue. Maybe a solution would be to "grey out" uninstantiated templates in the list ? Right now there is nothing that makes them stand out, and as they don't have an actual "Status", it would'nt conflict with the existing color code ?

[isd-project]

Nice idea! Yeah, I think I will add it to my list and implement it for the next release 👍