[Fontconfig] Re: fc-cache sometimes looses fonts

[Patrick Lam]

James Cloos wrote:
>>>>>>"Patrick" == Patrick Lam <plam at MIT.EDU> writes:
> 
> 
> Patrick> So I was suggesting this slightly evil thing.  If you call
> Patrick> FcPatternGetString for an FC_FILE, then fontconfig will
> Patrick> silently append the path of the cache file to the path of the
> Patrick> file. ... ... ...  The result is that no changes are visible
> Patrick> from the outside; no version number bumping or recompilation
> Patrick> required.
> 
> OK.  I get it now.  Looks perfect.

I've implemented this now.  It was kind of messy, I guess, because I had 
to also copy the full pathname whenever I was duplicating an FcPattern 
(and this happens a number of times).  It would be nice if I could think 
of a simpler solution, but this seems to work.

So, we have basenames in caches; these basenames are relative to the 
cache file's (conceptual) location.  (Even if we stuff them all in /var, 
we know what directory the cache file belongs to.)  So you can move your 
directories all around the drive, or mount them in different places, and 
things should continue working.

pat