#47569 - ‘qt-build-system’ retains too many references via wrappers

Package	Source(s)		Maintainer(s)
guix		PTS Buildd Popcon

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Date: Tue, 6 Apr 2021 16:57:35 +0300
From: Efraim Flashner <efraim@flashner.co.il>
To: Ludovic Courtès <ludo@gnu.org>
Subject: Re: bug#47569: ‘qt-build-system’
 retains too many references via wrappers
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[Message part 1 (text/plain, inline)]

On Tue, Apr 06, 2021 at 04:43:46PM +0300, Efraim Flashner wrote:
> On Tue, Apr 06, 2021 at 03:17:52PM +0200, Ludovic Courtès wrote:
> > Hi,
> > 
> > For the record, changing ‘qt-build-system’ would trigger a rebuild of
> > less than 400 packages according to the back-of-the-envelope calculation
> > below.  In that case, it’s tempting to fix on ‘master’ and include it in
> > the release.
> > 
> > Thoughts?
> > 
> 
> There are a couple of other things we want to change with the
> qt-build-system and the wrappers. Another one is changing the wrappers
> so they prefix (or was it suffix?) QT_QPA_PLUGIN (and I think others) so
> they can run natively on wayland. I think it would be a good
> improvement and worth it.

A quick search pulls up the following bugs: 43446 44982 45193 45221 45784.
Looks like there's a lot of desire to see it adjusted.

> > Ludo’.
> > 
> > --8<---------------cut here---------------start------------->8---
> > scheme@(guile-user)> ,use(gnu)
> > scheme@(guile-user)> ,use(guix build-system qt)
> > scheme@(guile-user)> ,use(guix)
> > scheme@(guile-user)> (define qtpkgs (fold-packages (lambda (pkg lst)
> > 						     (if (eq? (package-build-system pkg) qt-build-system)
> > 							 (cons pkg lst)
> > 							 lst))
> > 						   '()))
> > scheme@(guile-user)> (length qtpkgs)
> > $78 = 186
> > scheme@(guile-user)> ,use(guix graph)
> > scheme@(guile-user)> ,run-in-store (node-edges (@ (guix scripts graph) %reverse-package-node-type) (fold-packages cons '()))
> > $79 = #<procedure 7fe494f11520 at guix/graph.scm:94:17 (node)>
> > scheme@(guile-user)> (node-reachable-count qtpkgs $79)
> > $80 = 180
> > scheme@(guile-user)> (+ 186 180)
> > $81 = 366
> > --8<---------------cut here---------------end--------------->8---
> > 
> > 
> > 
> 
> -- 
> Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
> GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
> Confidentiality cannot be guaranteed on emails sent or received unencrypted



-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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#47569 ‘qt-build-system’ retains too many references via wrappers