bug#65665: package-mapping with #:deep? #t doesn't get all the implicit inputs

[Ludovic Courtès]

Hi,

Ulf Herrman <striness@tilde.club> skribis:

>> $ ./pre-inst-env guix build qgit -n --with-latest=qtbase
>> following redirection to 
>> `https://mirrors.ocf.berkeley.edu/qt/official_releases/qt/'...
>> following redirection to 
>> `https://mirrors.ocf.berkeley.edu/qt/official_releases/qt/6.6/'...
>> guix build: warning: cannot authenticate source of 'qtbase', version 6.6.0
>>
>> Starting download of /tmp/guix-file.CTehnY
>> From 
>> https://mirrors.ocf.berkeley.edu/qt/official_releases/qt/6.6/6.6.0/submodules/qtbase-everywhere-src-6.6.0.tar.xz...
>>  …-src-6.6.0.tar.xz  46.1MiB                                                 
>>                                                                        
>> 12.9MiB/s 00:04 ▕██████████████████▏ 100.0%
>> substitute: updating substitutes from 'http://192.168.1.48:8123'... 100.0%
>> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
>> substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 
>> 100.0%
>> substitute: updating substitutes from 'https://guix.bordeaux.inria.fr'... 
>> 100.0%
>> The following derivations would be built:
>>   /gnu/store/paixxkdaakv55bffggxx4l9hiknl8i5r-qgit-2.10.drv
>>   /gnu/store/f9fdjk1g1s1aqmlmi4clla2kqns7283v-qtbase-6.6.0.drv
>> 0.4 MB would be downloaded:
>>   /gnu/store/nl9dadzfmjm9wg7v3r31jkx773dl683x-module-import-compiled
>>   /gnu/store/6zryxmypw0wygayc9pvhyxkx47w0lyci-gperf-3.1
>>   /gnu/store/a57n7wy8mdi7l52pr4zg07132blgj5xp-qgit-2.10-checkout
>
> And if you do a quick 'cat
> /gnu/store/paixxkdaakv55bffggxx4l9hiknl8i5r-qgit-2.10.drv'...

[...]

> you'll see we have both a
> ("/gnu/store/f9fdjk1g1s1aqmlmi4clla2kqns7283v-qtbase-6.6.0.drv",["out"])
> and a
> ("/gnu/store/hjhr64r5x3bhdw63zz3a3v09vfrlkhrh-qtbase-5.15.10.drv",["out"])
> in use.
>
> (and if this were a transformation that applied to all packages, it
> would be using two variants of the entire world beneath qtbase also)

D’oh!  Now we have a bug to chew.  (Sorry if this was obvious to you
from the start; it wasn’t to me!)

I don’t know, should we start by having a proper bug report for this and
study how this happen?

Again I’m sorry if I’m slow to understand, but I’d like to make sure we
have a good understanding of the problem before we start discussing
solutions.

Thanks,
Ludo’.