GNU logs - #37933, boring messages

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Subject: bug#37933: gst* plugins in non-default profile not found by webkitgtk browsers (e.g. epiphany)
Resent-From: Pierre Neidhardt <mail@HIDDEN>
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From: Pierre Neidhardt <mail@HIDDEN>
Date: Sat, 26 Oct 2019 12:48:33 +0200
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Recipe that fails:

=2D-8<---------------cut here---------------start------------->8---
guix remove gst-libav gst-plugins-bad gst-plugins-base gst-plugins-good gst=
-plugins-ugly
guix package -p foo -i gst-libav gst-plugins-bad gst-plugins-base gst-plugi=
ns-good gst-plugins-ugly epiphany
foo/bin/epiphany https://archive.org/details/guix-videos=20
=2D-8<---------------cut here---------------end--------------->8---

Recipe that works

=2D-8<---------------cut here---------------start------------->8---
guix package -i gst-libav gst-plugins-bad gst-plugins-base gst-plugins-good=
 gst-plugins-ugly epiphany
foo/bin/epiphany https://archive.org/details/guix-videos=20
=2D-8<---------------cut here---------------end--------------->8---

=2D-=20
Pierre Neidhardt
https://ambrevar.xyz/

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Pierre Neidhardt <mail@HIDDEN>
Subject: bug#37933: Acknowledgement (gst* plugins in non-default profile
 not found by webkitgtk browsers (e.g. epiphany))
Message-ID: <handler.37933.B.157208692330990.ack <at> debbugs.gnu.org>
References: <87mudnaike.fsf@HIDDEN>
X-Gnu-PR-Message: ack 37933
X-Gnu-PR-Package: guix
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Date: Sat, 26 Oct 2019 10:49:02 +0000

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37933: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D37933
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Message sent to bug-guix@HIDDEN:

Subject: bug#37933: gst* plugins in non-default profile not found by webkitgtk browsers (e.g. epiphany)
Resent-From: Marius Bakke <mbakke@HIDDEN>
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Resent-Date: Mon, 28 Oct 2019 22:54:01 +0000
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To: Pierre Neidhardt <mail@HIDDEN>, 37933 <at> debbugs.gnu.org
From: Marius Bakke <mbakke@HIDDEN>
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Date: Mon, 28 Oct 2019 23:53:05 +0100
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Pierre Neidhardt <mail@HIDDEN> writes:

> Recipe that fails:
>
> --8<---------------cut here---------------start------------->8---
> guix remove gst-libav gst-plugins-bad gst-plugins-base gst-plugins-good g=
st-plugins-ugly
> guix package -p foo -i gst-libav gst-plugins-bad gst-plugins-base gst-plu=
gins-good gst-plugins-ugly epiphany
> foo/bin/epiphany https://archive.org/details/guix-videos=20
> --8<---------------cut here---------------end--------------->8---
>
> Recipe that works
>
> --8<---------------cut here---------------start------------->8---
> guix package -i gst-libav gst-plugins-bad gst-plugins-base gst-plugins-go=
od gst-plugins-ugly epiphany
> foo/bin/epiphany https://archive.org/details/guix-videos=20
> --8<---------------cut here---------------end--------------->8---

This only works when you already have 'gstreamer' in the profile, right?

I don't think the first example can ever work short of wrapping the
executable?

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Message sent to bug-guix@HIDDEN:

Subject: bug#37933: gst* plugins in non-default profile not found by webkitgtk browsers (e.g. epiphany)
Resent-From: Pierre Neidhardt <mail@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-guix@HIDDEN
Resent-Date: Tue, 29 Oct 2019 12:14:01 +0000
Resent-Message-ID: <handler.37933.B37933.157235120428016 <at> debbugs.gnu.org>
Resent-Sender: help-debbugs@HIDDEN
To: Marius Bakke <mbakke@HIDDEN>, 37933 <at> debbugs.gnu.org
From: Pierre Neidhardt <mail@HIDDEN>
In-Reply-To: <87ftjctrce.fsf@HIDDEN>
References: <87mudnaike.fsf@HIDDEN> <87ftjctrce.fsf@HIDDEN>
Date: Tue, 29 Oct 2019 13:13:16 +0100
Message-ID: <874kzru4v7.fsf@HIDDEN>
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Hi Marius!

> This only works when you already have 'gstreamer' in the profile, right?

`gstreamer' is propagated by the gst plugins.

> I don't think the first example can ever work short of wrapping the
> executable?

WebKitGTK-based browsers look for the plugins in the GST_PLUGIN_PATH
and the GST_PLUGIN_SYSTEM_PATH environment variables.

I retested today: actually I realized that it works if I clear
~/.cache/gstreamer-1.0 :p

The problem is that the cache goes stale when the path to the plugins
changes.
It's a rather general problem with Guix, I think it's been discussed
before.

If we had a way to test for the cache staleness, we could add some code
to the Epiphany wrapper that clears the cache if stale.

=2D-=20
Pierre Neidhardt
https://ambrevar.xyz/

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