Public Service Announcement: Debian helpfully defines datadir
to be /usr/share/games
for some packages, which means that the AppData and MetaInfo files get installed into /usr/share/games/appdata
which isn’t picked up by the metadata parsers.
It’s probably safer to install the AppData files into $datarootdir/appdata
as this will work even if a distro has redefined datadir
to be something slightly odd. I’ve changed the examples on the AppData page, but if you maintain a game on Debian with AppData then this might affect you when Debian starts extracting AppSpream metadata in the next few weeks. Anyone affected will be getting email in the next few days, although it only looks to affect very few people.