From: Maxime Devos <maximedevos@telenet.be>
To: Josselin Poiret <dev@jpoiret.xyz>,
61911@debbugs.gnu.org, 61885@debbugs.gnu.org
Cc: Julien Lepiller <julien@lepiller.eu>
Subject: bug#61911: error: mate-polkit: unbound variable
Date: Thu, 2 Mar 2023 16:11:05 +0100 [thread overview]
Message-ID: <27cd1079-8e93-f9b8-42b3-584d7bfbf1e8@telenet.be> (raw)
In-Reply-To: <874jr3kyp3.fsf@jpoiret.xyz>
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Op 02-03-2023 om 15:36 schreef Josselin Poiret:
> Hi Maxime,
>
> Maxime Devos <maximedevos@telenet.be> writes:
>
>> In unknown file:
>> 3 (primitive-load-path "gnu/packages/xfce" #<procedure 7f?>)
>> In gnu/packages/xfce.scm:
>> 1156:19 2 (_)
>> In ice-9/boot-9.scm:
>> 1685:16 1 (raise-exception _ #:continuable? _)
>> 1685:16 0 (raise-exception _ #:continuable? _)
>>
>> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
>> error: mate-polkit: unbound variable
>
> This is the same kind of issue as [1]: both xfce and mate require each
> other (the second through mate -> freedesktop -> kde-frameworks ->
> kde-plasma -> display-managers -> xfce), and depending on the order in
> which they're loaded, mate-polkit-for-xfce might get defined before
> mate-polkit is. The solution I suggested there was to define the
> variant in the same file as the original package, but here I'm not sure
> if this is the right call.
>
> In general, I'd much rather try to get rid of those pesky module cycles,
> as they cause general headaches for guix pull. I remember Julien
> using (guix modules) to do some analysis at the Guix days, maybe we
> could get some pointers on how to handle this specific situation?
>
> WDYT?
>
> [1] https://issues.guix.gnu.org/61885
> (mid: F29B8BFE-A175-4128-8093-4A810681E235@winter.cafe)
I haven't gone to Guix days so I can't comment on that, but I'd like to
note that there are some simple patches for breaking up lots of package
cycles at <https://issues.guix.gnu.org/54539#62> (*). In particular,
#:use-module -> #:autoload appears promising (^).
Basically, you can consider a module reference to be 'strong' if its of
the form (define stuff (package (inherit reference)) ...), and 'weak' if
its just a package input (or more generally, something thunked).
'Strong' cycles are problematic, but 'weak' cycles should be resolvable
by delaying loading the required modules until needed.
I don't know if these patches would solve this particular 'mate-polkit'
issue -- if the 'mate -> freedesktop -> ... -> xfce' cycle is 'weak',
something like those patches should work, but if it isn't, those patches
would be insufficient.
(*) Beware of https://issues.guix.gnu.org/54539#63 though; looks like I
made some mistakes in hurd.scm and image.scm.
Greetings,
Maxime.
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next prev parent reply other threads:[~2023-03-02 15:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-02 10:03 bug#61911: error: mate-polkit: unbound variable Maxime Devos
2023-03-02 14:36 ` Josselin Poiret via Bug reports for GNU Guix
2023-03-02 15:11 ` Maxime Devos [this message]
2023-03-06 23:05 ` Ludovic Courtès
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