Not working on gnome with xwayland

[llacroix]

The thumbnailer config for gnome won't work on xwayland setup without a xvfb-run shipped with the distribution. The other problem is that nautilus seems to call the thumbnailer within a "jail" so folders like XDG_RUNTIME_DIR won't be accessible in the context stl-thumb is executed.

What I did to fix the issue is to have the thumbnailer call a sh script that will create a XDG_RUNTIME_DIR in /tmp then call stl-thumb.

stl-thumbnailer

#!/bin/sh                                                                                                                                                                                                                                     

export XDG_RUNTIME_DIR=/tmp/xdg-runtime
mkdir $XDG_RUNTIME_DIR

wlheadless-run -- stl-thumb -f png -s $1 $2 $3

rm -r $XDG_RUNTIME_DIR

stl-thumb.thumbnailer

[Thumbnailer Entry]
TryExec=stl-thumb
Exec=stl-thumbnailer %s %i %o                                                                                                                                                                                                                 
MimeType=model/3mf;model/stl;model/x.stl-ascii;model/x.stl-binary;application/sla;

obj-thumb.thumbnailer

[Thumbnailer Entry]
TryExec=stl-thumb
Exec=stl-thumbnailer %s %i %o                                                                                                                                                                                                                 
MimeType=model/obj;

Then wlheadless-run is able to start the weston compositor using the defined XDG_RUNTIME_DIR available in the current context.

I think the script could be improved to work with X11 using xvfb-run in that case.