get-config-dir: errors from get-config-dir-$method not propagated

Hi there,

I noticed that errors from get-config-dir-$method are not propagated in 
get-config-dir [1]. This means that while a call to task_error, e.g. in 
get-config-dir-git, causes an error log and save log call, the 
installation does not stop afterwards but continues:


FAI_CONFIG_SRC is set to git+ssh://example.com/srv/git/fai/install.git#blub
Updating git copy in /var/lib/fai/config
Von ssh://example.com/srv/git/fai/install
    7256e1cd5..6ea9c2559  config     -> origin/config
error: Pfadspezifikation 'origin/blub' stimmt mit keinen git-bekannten 
Dateien überein.
Error in task confdir. Code: 882
Traceback: task_error _git_checkout main
Calling hook: savelog.DEFAULT
savelog.DEFAULT      OK.
Source hook: savelog.LAST.sh
ERRORS found in log files. See 
/var/log/fai/dummy/confupdate-20240221_105633/error.log
savelog.LAST.sh      OK.
Save log files via ssh to 
[email protected]:log//dummy/confupdate-20240221_105633
FATAL ERROR. Installation stopped.
Source hook: setup.DEFAULT.sh
hostname: dummy
setup.DEFAULT.sh     OK.
Calling task_setup
FAI_FLAGS:
Calling task_defclass
fai-class: Defining classes.


I have not tested but could imagine that the behavior is similar when 
calling task_error from a hook.


Best,
Maximilian


[1]: 
https://github.com/faiproject/fai/blob/master/lib/get-config-dir#L44C9-L44C31