[asdf-devel] configuration question

[Daniel Herring]

Hi all,

I've been kicking the old LibCL tires lately (tyres for those of you in 
the UK).  ;)

With ASDF1, LibCL's configuration required the following steps to be 
added to the user's lisp rc files.
- make sure ASDF is loaded (and trying to guess whether to use the
   implementation's copy or LibCL's copy)
- push LibCL's link directory into *central-registry*
- load asdf-binary-locations


I think ASDF2 makes these steps easier.
- make sure LibCL's ASDF is loaded (ASDF's upgrading handles old
   implementations, and blocks a downgrade?)
- drop a new file in ASDF's config.d
- put some translations in that config file

So the only potential change to the user's lisp rc file is an added line 
to load LibCL's ASDF file.  The other steps can be done once for all 
implementations.


However, I'm having some difficulty with the config.d file.  So far, the 
syntax is fine; its the naming that I can't get right.  When a new version 
of LibCL is installed, I don't want to auto-uninstall the old version... 
So my thought was to create files like the following.

50-libcl-2009-10-27.conf # old config
50-libcl-2010-10-27.conf # new, preferred config

Unfortunately, string< will load the old file first; thus the old 
libraries will be found first...  Can you think of a natural naming scheme 
such that the new libraries will be found?

Thanks,
Daniel