On Wed, Jan 30, 2019 at 10:33 AM Akira TAGOH <akira@xxxxxxxxx> wrote: > > On Wed, Jan 30, 2019 at 5:02 AM Keith Packard <keithp@xxxxxxxxxx> wrote: > > Yes, that was the plan. Alexander suggested the following syntax: > > > > <salt id="randomdata">/usr/share/fonts</salt> > > > > I think this will work, although it seems a bit fragile. In particular, > > if the host has salt for some directories, those will be defined > > relative to the host paths, not the flatpak paths. > > Right. though this syntax looks primitive. it might manages to be done > if one writes everything for what they want. but if we can have easier > way - which can be done with minimal effort and inheritance for others > from host - that may be better. > > > Do we need to process the 'salt' elements and 'remap-dir' elements in > > order and remap old salt elements as remap-dir elements get loaded? That > > also seems fragile to me. > > Hm, to deal with more complicated cases, I guess we may need to have > one global salt to affect everything and a path-specific salt for > remapped path. for flatpak case, they want to have a global salt to > change a salt in sandbox (for /usr/share/fonts in sandbox etc) and set > salt from host in 'remap-dir' to build cache filenames on host (for > /run/host/fonts and so on). > This would avoid collision between one and origins. and assuming that > flatpaks can load config from host too, we could have: We don't want a global salt for everything in the container. In reality things are more complicated than that. For example, an app may bundle fonts, which will be in like /app/share/fonts, in addition to the runtime fonts in /usr/share/fonts. These come from different places and may individually be different in a different (or updated) app, so the directories need to have different salts. Also, it is quite possible that some host font directory is *not* remapped, but still visible to the app. For example /opt/fonts for an app that has filesystem access. If for whatever reason fontconfig looks at this directory it should not apply any salt for it. _______________________________________________ Fontconfig mailing list Fontconfig@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/fontconfig
