[Bug 2351347] Review Request: adwaita-fonts - Adwaita Sans, a variation of Inter, and Adwaita Mono, Iosevka customized to match Inter

https://bugzilla.redhat.com/show_bug.cgi?id=2351347

--- Comment #13 from Akira TAGOH  ---
still missing an action for:
> Font packages SHOULD include the fontconfig files, that define the selection and substitution rules applying to their font files,

You need to write your own fontconfig config files for adwaita-sans-fonts and
adwaita-mono-fonts according to the above template I mentioned. I assume that
this is used for GNOME only and changes will be done by
gsettings-desktop-schemas. something what you need would be:

59-adwaita-sans-fonts.conf:
--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
<fontconfig>
  <alias>
    <family>sans-serif</family>
    <prefer>
      <family>Adwaita Sans</family>
    </prefer>
  </alias>
  <alias>
    <family>Adwaita Sans</family>
    <default>
      <family>sans-serif</family>
    </default>
  </alias>
</fontconfig>
--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8

and

59-adwaita-mono-fonts.conf:
--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
<fontconfig>
  <alias>
    <family>monospace</family>
    <prefer>
      <family>Adwaita Mono</family>
    </prefer>
  </alias>
  <alias>
    <family>Adwaita Mono</family>
    <default>
      <family>monospace</family>
    </default>
  </alias>
</fontconfig>
--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8--->8

The priority 59 should basically works for the desktop specific fonts since
they have own config to make it default.
You could also add similar for system-ui in adwaita-sans-fonts.