Fontconfig currently stores cached information about fonts in
per-directory files called 'fonts.cache-<version>'. These are stored
right in the font directories which means they'll get copied and managed
automatically as people move fonts around.
However, storing cached information in what is ostensibly a read-only
directory is "unfriendly" and violates the FSH guidelines. This data is
just cached versions of data available from the font files themselves and
so the FSH says it should live (somehow) in /var/cache.
I'm open to suggestions, but here's one simplistic possibility:
Create a shadow heirarchy in /var/cache/fonts which mirrors the
various font directory heirarchies and populate that at appropriate points
with fonts.cache files.
I'd do this by creating a new table of "cache prefix" mappings:
/usr/share/fonts -> /var/cache/fonts/share
This mapping would direct any fonts.cache files related to directories
under /usr/share/fonts to be stored in /var/cache/fonts/share by simply
replacing the /usr/share/fonts prefix with /var/cache/fonts/share:
/usr/share/fonts/truetype/arphic/fonts-cache-1 ->
/var/cache/fonts/share/truetype/arphic/fonts-cache-1
Any directories not matching a configured prefix would map to themselves;
this makes the existing configuration and cache files compatible.
Does this seem like a good plan? Can anyone come up with a better way of
moving the storage of fonts.cache into /var/cache?
Keith Packard XFree86 Core Team HP Cambridge Research Lab
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