GNU bug report logs - #30710
guix graph gives duplicate nodes

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From: ludo <at> gnu.org (Ludovic Courtès)
To: Hartmut Goebel <h.goebel <at> crazy-compilers.com>
Cc: Björn Höfling <bjoern.hoefling <at> bjoernhoefling.de>, 30710 <30710 <at> debbugs.gnu.org>
Subject: bug#30710: guix graph gives duplicate nodes
Date: Mon, 12 Mar 2018 15:27:19 +0100

Hello,

Hartmut Goebel <h.goebel <at> crazy-compilers.com> skribis:

> On Fri, 09 Mar 2018 23:59:26 +0100 ludo <at> gnu.org (Ludovic Courtès) wrote:
>>
>>> Good catch!  I implemented what you suggest above in commit
>>> 464f5447396fcec9b43f7eab71d5d42b522a157f.
>
> Thanks, this solved the issue only partially: On my "kde-plasma" branch:
>
> $ ./pre-inst-env guix graph plasma-workspace | grep autoconf
>   "133094208" [label = "autoconf-wrapper-2.69", shape = box, fontname =
> Helvetica];
>   "133094976" [label = "autoconf-2.69", shape = box, fontname = Helvetica];
>   "152772352" [label = "autoconf-wrapper-2.69", shape = box, fontname =
> Helvetica];
>   "152420544" [label = "autoconf-2.69", shape = box, fontname = Helvetica];
>
> There are other packages, which are duplicate but don't have a factory
> AFAIK:
>
> $ ./pre-inst-env guix graph plasma-workspace | grep kbus
>   "130257472" [label = "kdbusaddons-5.42.0", shape = box, fontname =
> Helvetica];
>   "148171200" [label = "kdbusaddons-5.42.0", shape = box, fontname =
> Helvetica];

That stems from the use of ‘package-mapping’ or
‘package-input-rewriting’ (maybe via ‘package-with-python2’), which can
create distinct package objects mapping to the same derivation.

I don’t have a good solution here.

Thanks,
Ludo’.

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