Le 2017-11-07 13:52, Hartmut Goebel a écrit :
> Am 07.11.2017 um 12:05 schrieb julien lepiller:
>> Since we encourage users to use use-package-modules etc, I think it's
>> better
>> to catch this error and explain it to users as soon as it happens.
>> It's more
>> friendly for users than a troubleshooting section in the manual.
> 
> +1
> Thanks for proposing a patch so quickly!
> 
>> Package module "abc" does not exist.
>> ERROR: In procedure scm-error:
>> ERROR: check "use-package-modules" line in your configuration.
> 
> For me this looks confusing: The actual error message is not prefixed 
> by
> "ERROR:". Also (nitpicking) the explanation could by a bit more 
> verbose.
> Like this:
> 
> ERROR: In procedure scm-error:
> ERROR: Package module "abc" does not exist.
> ERROR: Please check the "use-package-modules" line in your 
> configuration.
> 
> It would even be better is the fist line would not refer to "procedure
> scm-error", but to the config actually processed (and even the line in
> there). But nevertheless this patch is a big improvement already.

This new version outputs something like this :


guix system: error: failed to load 'vm-image.tmpl':
vm-image.tmpl:6:0: vm-image.tmpl:6:0: Package module "abc" does not 
exist.
Check the "use-package-modules" line in your configuration.


Previously I tested in in the REPL, hence no filename. This time I
modified vm-image.tmpl to add an "abc" package, and ran
"guix system vm vm-image.tmpl".