bug#50789: syncthing-gtk creates autostart file with wrong bin

[John Kehayias]

Hello,

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐

On Monday, September 27th, 2021 at 5:23 PM, Liliana Marie Prikler wrote:

> Hi,
>
> Am Montag, den 27.09.2021, 19:04 +0000 schrieb John Kehayias:
>
> > [...]
> >
> > But back to the matter at hand. Medium to long-term I support better
> > Guix services for autostart, but that doesn't address the problem of
> > having packages run as intended by upstream, at least with reasonable
> > expectations. I think this is expected and reasonable behavior, that
> > a program can create a proper .desktop file in Guix.
>
> Unless you are running a dedicated desktop file/autostart editor like
> alacarte or whatever gnome-tweaks has going for it, writing to
> .config/autostart is not reasonable behaviour.
>

Sorry, I don't understand this comment. I think this is just the XDG 
specification, user autorun desktop files go in ~/.config/autostart. If a 
program wants to autostart (e.g. user enables the option) this I think is the 
expected and conformant behavior. I see many programs doing this (and is where 
you'd write if you want to change the per-user behavior of something in the 
system autostart, which might also be relevant). Anyway, we are getting 
sidetracked and that's not important for the matter at hand, I don't think.

> > Looking at another non-Guix system, the autostart files I have
> > in ~/.confg/autostart mostly (syncthing-gtk being the main
> > exception) use just
> >
> > Exec=program-name
>
> The "full path" desktop files used in Guix do have some advantages.
> Also, on other distros when using stuff like systemd in a similar
> manner to shepherd, you have full paths again.
>
> > I see this mostly true for /etc/xdg/autostart as well (non-Guix
> > system). So I think this is an easy and typical behavior we can
> > implement. In this case patching syncthing-gtk to produce
> > Exec=syncthing-gtk. Perhaps upstream would consider it as well,
> > unless they have good reason for a full path here, as opposed to
> > other programs. (Upstream is a bit quiet in activity though.)
> >
> > What do we think?
>
> I think upstream as good reasons to use full paths, e.g. to prevent the
> wrong syncthing from being used when there are two in /usr and
> /usr/local. Were Guix to police upstream on this matter, the decision
> would clearly be to make this feature optional at the click of a button
> – and not one that annoyingly pops up if Icecat is not your default
> browser, if you understand what I'm trying to say.
>

So then I think we end up wanting to patch syncthing-gtk to create something 
like Exec=/path/to/profile/bin/syncthing-gtk I'm not sure off the top of my 
head how to do that (without ending up as it currently does with the direct 
/gnu/store/.../.syncthing-gtk-real since that is what the program will see as 
the origin of the process). I can take a look if no one has the Python 
incantation ready. Or else default to using $PATH and/or which; probably the 
right thing most of the time but I'm not sure.

John