Re: The usability of Guix configurations

[myglc2]

On 11/07/2017 at 14:13 julien lepiller writes:

> 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.

Thanks Julien, I tried the patch and it works for me. I think it is a
great improvement.

Small suggestion: is it feasible for the last line to read:

Please add a module containing "abc" to the "use-package-modules" line in your 
configuration.

TIA - George