Re: How CLSQL finds and loads foreign libraries

On Wed, 8 Jun 2005 15:14:06 -0600, Kevin Rosenberg <kevin-HJRc7zDS/[email protected]> wrote:

> (asdf:operate 'asdf:load-op 'clsql)
> (clsql:add-library-path PATHNAME)
> (asdf:operate 'asdf:load-op 'clsql-postgresql)
>
> While this technique as merit, it won't work for the Debian package
> since Debian users rightfully expect (clc-require 'clsql) to work
> without site specific changes.

Let me come back to this one for a moment.  Isn't there some feature
that you can use to check if you're on Debian?  I think at least
something like this should work

  #+#.(cl:if (cl:find-package :clc) :common-lisp '(cl:or))
  (clsql:add-library-path #p"/debian/specific/folder/")

And users who are not Debian maintainers but who want to provide
site-specific paths can solve the problem of having to load CLSQL
before the package is available like this (in ASDF):

  (defmethod perform :after ((o load-op) (c (eql (find-system :clsql))))
    (funcall (find-symbol "ADD-LIBRARY-PATH" (find-package :clsql))
             #p"/my/private/lib/path/"))

This is untested but if it works and is OK for you we don't need to
resort to non-Lisp external stuff like hard-coded file locations or
environment variables.

What do you think?

Cheers,
Edi.