There is an issue on the FreeCAD snap whereby whenever using fonts, they can be picked from a font selector, but the chosen font is not rendered. This issue is not present on the FreeCAD daily PPA package. There fonts can be chosen and the chosen one is rendered, so this is probably related to the snap package.
I built some snaps a while back, and I’d like to tackle this issue. However, I don’t know where to start when it comes to fonts and snaps. I would welcome any pointers. Thank you!
Information on how to add font support to snaps seems inexistent, or at least I’m unable to find it. The closest I found was this comment from a bug report:
Workaround for this issue:
(in apps section)
apps:
some_app:
command: some_app
environment:
XDG_DATA_HOME: $SNAP/usr/share
FONTCONFIG_PATH: $SNAP/etc/fonts/conf.d
FONTCONFIG_FILE: $SNAP/etc/fonts/fonts.conf
Of course this only works in devmode. After switching to strict mode program in snap ends with error that it can’t reach /etc/fonts/fonts.conf file. I think should be resolved by adding interface.
These environment variables are not defined in FreeCAD’s [snapcraft.yaml](https://github.com/FreeCAD/FreeCAD-snap/blob/master/snap/snapcraft.yaml) file. On my system:
/snap/freecad/etc/fonts/conf.d is empty
/snap/freecad/etc/fonts/fonts.conf does not exist.
$HOME/snap/freecad/common/.cache/fontconfig/ has lots of files in it
Digging deeper, it seems that fonts should be handled by the kde-neon extension, as defined in snapcraft.yaml
That’s where I’m now stuck. Any comments from any font/snap experts will be highly appreciated.
I’m willing to experiment since I’m a FreeCAD user, but I have trouble enabling more verbose logging from the application. Meanwhile I will try to look at other snaps using kde-neon extensions and see if they have fonts working (yesterday I checked Krita and fonts were working OK…)
