GNU bug report logs - #47569
‘qt-build-system’ retains too many references via wrappers

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Message #16 received at 47569 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: 47569 <at> debbugs.gnu.org
Subject: Re: bug#47569: ‘qt-build-system’
 retains too many references via wrappers
Date: Tue, 06 Apr 2021 15:17:52 +0200

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?

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---

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