The fontconfig package provides utilities for configuring font directories, customizing font access, etc.
From wiki.alpinelinux.org:
Some applications do not specify a specific font to use but rather say sans-serif, serif or monospace. This is where Fontconfig comes into place by substituting a general font with a specific font.
We get fontconfig both by virtue of running a Xfce desktop, but also via Firefox. Since GTK depends on it, it is very likely that a desktop environment is already going to have it.
apk info --rdepends fontconfig
fontconfig-2.15.0-r3 is required by:
font-dejavu-2.37-r6
font-misc-misc-1.1.3-r1
...
gtk+3.0-3.24.49-r1
xfce4-settings-4.20.1-r0
pango-1.56.3-r0
cairo-1.18.4-r0
gtk4.0-4.18.5-r0
...
firefox-139.0-r0
Fontconfig provides (apk info --provides fontconfig) various fc-prefixed
programs:
apk info --quiet --provides fontconfig | sed -En '/cmd:/s/cmd:(.*)=.*/\1/p' | paste - -
fc-cache fc-cat
fc-conflist fc-list
fc-match fc-pattern
fc-query fc-scan
fc-validate
fc-match matches available fonts.
fc-match sans
DejaVuSans.ttf: "DejaVu Sans" "Book"
fc-list lists fonts available to programs using fontconfig.
fc-list "DejaVu Sans"
fc-cache rebuilds the font information cache files. The -v flag asks it to
talk about what it is doing.
Place TTF files in ~/.local/share/fonts. If needed, fc-cache to refresh.
Fira was a font Mozilla developed for Firefox OS, which is no more. The monospace variant of the font survived and blossomed into Fira Code, which adds progarmming ligature support.
mkdir /tmp/fira && cd /tmp/fira
wget https://github.com/tonsky/FiraCode/releases/download/6.2/Fira_Code_v6.2.zip
unzip Fira*.zip
mkdir -p ~/.local/share/fonts/FiraCode
mv ttf ~/.local/share/fonts/FiraCode
Adwaita Sans is a Inter clone by the GNOME folks.
Change the default in “Appearance” settings:
xfconf-query -c xsettings -np /Gtk/FontName -t string -s 'Adwaita Sans 10'
xfconf-query -c xsettings -np /Gtk/MonospaceFontName -t string -s 'Fira Code 10'