From mboxrd@z Thu Jan  1 00:00:00 1970
From: Timothy Sample <samplet@ngyro.com>
Subject: Re: GDM update!
Date: Mon, 11 Feb 2019 10:31:12 -0500
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References: <875ztrp982.fsf@gnu.org> <20190211153946.2a38a740@scratchpost.org>
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In-Reply-To: <20190211153946.2a38a740@scratchpost.org> (Danny Milosavljevic's
	message of "Mon, 11 Feb 2019 15:39:46 +0100")
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To: Danny Milosavljevic <dannym@scratchpost.org>
Cc: guix-devel@gnu.org

Hi Danny,

Danny Milosavljevic <dannym@scratchpost.org> writes:

> Hi Ludo,
>
> https://github.com/GNOME/gdm/commit/0bb8a777cfc0a3bc53c2c2830dd7e6e2baeee=
f38#diff-9b802b1ffb5f0ff95bfaa85046d262e7 says:
>
>>custom is a magic name we used to allow for having the user decide
>> their session by a ~/.xsession file.  We no longer support that
>> construct and haven't for many years. Instead, users who want that
>> functionality can just add a xsession file to accomplish it.
>>This commit just removes some left over cruft that never got cleaned up.
>
> [...]

Thanks!  I didn=E2=80=99t see this before writing my other message, but it
explains why the comments and code don=E2=80=99t match.

Maybe the GDM folks expect that we write a custom =E2=80=9C.desktop=E2=80=
=9D file that
runs a custom script that checks for =E2=80=9C~/.xsession=E2=80=9D and runs=
 it.  It
could use =E2=80=9CTryExec=E2=80=9D to figure out if =E2=80=9C~/.xsession=
=E2=80=9D exists, and offer it
to the user (in the session selector) in that case.  To be concrete, we
would create a =E2=80=9Cuser.desktop=E2=80=9D session file with the followi=
ng contents.

    [Desktop Entry]
    Name=3DUser Session
    Comment=3DStart a user-defined session
    Exec=3Drun-user-xsession
    TryExec=3Dxsession-exists-p
    Icon=3D
    Type=3DApplication

Here, =E2=80=9Crun-user-xsession=E2=80=9D and =E2=80=9Cxsession-exists-p=E2=
=80=9D are custom scripts
that we would write.  If this file were somewhere that GDM knows about
(e.g., =E2=80=9C/run/current-system/profile/share/xsessions=E2=80=9D), it s=
hould work.


-- Tim