Re: Software running in a container fails when using fontconfig?

[Edouard Klein]

Hi,

This may miss the mark wildly, but I remember having trouble with
fontconfig in a container a few months ago and solving it with
--emulate-fhs  maybe this is worth a try.

Cheers,

Edouard.
Simen Endsjø <contact@simendsjo.me> writes:

> Hi, I'm packaging a piece of software which crashes when launching
> chromium embedded framework.
>
> The error is
>   Fontconfig error: Cannot load default config file: No such file: (null)
>
> I found a similar issue for Nix which suggests the error is caused by
> fontconfig not being installed globally and suggests a patch:
> https://github.com/NixOS/nixpkgs/issues/176081#issuecomment-1145903568
>
> I tried creating a symlink at /etc/fonts/fonts.conf, but while I get
> further, it still crashes.
>
>   sudo ln -s ~/.config/fontconfig/fonts.conf /etc/fonts/fonts.conf
>
>   Fontconfig warning: no <cachedir> elements found. Check configuration.
>   Fontconfig warning: adding <cachedir>/var/cache/fontconfig</cachedir>
>   Fontconfig warning: adding <cachedir prefix="xdg">fontconfig</cachedir>
>   Trace/breakpoint trap
>
> /var/cache/fontconfig is on a read-only filesystem, so I cannot
> experiment with adding it there.
>
> I tried adding all fonts and fontconfig to my system configuration, but
> this didn't generate /etc/fonts/fonts.conf nor /var/cache/fontconfig/*.
>
> Unfortunately, I haven't been able to test the Nix patch as my naive `-L
> ~/code/guix` fails to compile various modules.
>
> Any input before I spent a lot of time trying to get this Nix patch working?