[plt-scheme] best practices for directory structures

At Thu, 17 Apr 2003 14:09:12 -0400 (EDT), "David A. Herman" wrote:
>   For list-related administrative tasks:
>   http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> 
> > >   export PLTHOME=$PLTHOME:/your/collection/dir
> >
> > PLTCOLLECTS not PLTHOME
> 
> The documentation (PLT MzScheme: Language Manual Ch. 16) says that both
> variables are used to find collections:
> 
> (current-library-collection-paths
>  (path-list-string->path-list
>   (or (getenv "PLTCOLLECTS") "")
>   (or (ormap (lambda (p) (and p (directory-exists? p) (list p)))
>              (list (let ([v (getenv "PLTHOME")])
>                      (and v (build-path v "collects")))
>                    (find-executable-path program "collects")
>                    (find-executable-path
>                     program
>                     (build-path 'up "collects"))
>                    (find-executable-path
>                     program
>                     (build-path 'up 'up "collects"))))
>       null)))
> 
> In fact, I can't get either to work (Win2K): when I set the PLTCOLLECTS
> variable, MzScheme fails even to start up because it can't find the core
> libraries. When I set the PLTHOME variable, it ignores it.

You need to include the default collection. Set PLTCOLLECTS to:

  /my/collects:

or

  :/my/collects

The first if you want your collection to override the built ins, and
the second if you want the built ins to override your collections.

Robby