[r6rs] on libraries extensions and search paths

[r6rs] on libraries extensions and search paths

[Marco Maggi]

Many R6RS implementations support searching for libraries in
files ending with the ".sls" extension, giving precedence to
an  implementation-specific  extension;  for  example:  when
both

mine.sls
mine.guile.sls

files are  present, Guile should  load "mine.guile.sls" when
looking for "(mine)".  Is there a plan to add this?

  Many R6RS  implementation allow the selection  of a search
path  for libraries  through an  environment  variable; what
about "GUILE_R6RS_LIBPATH"?
-- 
Marco Maggi

Re: [r6rs] on libraries extensions and search paths

[Andy Wingo]

On Mon 07 Jun 2010 21:58, Marco Maggi <marco.maggi-ipsu@poste.it> writes:

> Many R6RS implementations support searching for libraries in
> files ending with the ".sls" extension, giving precedence to
> an  implementation-specific  extension;  for  example:  when
> both
>
> mine.sls
> mine.guile.sls
>
> files are  present, Guile should  load "mine.guile.sls" when
> looking for "(mine)".  Is there a plan to add this?

I believe that if you modify %load-extensions you can achieve this
effect. I would rather not do it by default due to the stat penalty.

  (set! %load-extensions '(".guile.sls" ".sls" ".scm" ""))

See "Loading" in the manual.

>   Many R6RS  implementation allow the selection  of a search
> path  for libraries  through an  environment  variable; what
> about "GUILE_R6RS_LIBPATH"?

See GUILE_LOAD_PATH and %load-patch in the manual. See also docs on
GUILE_LOAD_COMPILED_PATH, which currently only exist in the NEWS (ugh).

Andy
-- 
http://wingolog.org/

Re: [r6rs] on libraries extensions and search paths

[Marco Maggi]

"Andy Wingo" wrote:
> I  believe that  if  you modify  %load-extensions you  can
> achieve this effect.  I would rather not do  it by default
> due to the stat penalty.
>
>  (set! %load-extensions '(".guile.sls" ".sls" ".scm" ""))

Do  you mean  to  edit boot-9.scm  or  something like  that?
Petite  Chez Scheme  allows to  set the  extensions  from an
environment variable...
-- 
Marco Maggi

Re: [r6rs] on libraries extensions and search paths

[Andy Wingo]

On Tue 08 Jun 2010 07:03, Marco Maggi <marco.maggi-ipsu@poste.it> writes:

> "Andy Wingo" wrote:
>> I  believe that  if  you modify  %load-extensions you  can
>> achieve this effect.  I would rather not do  it by default
>> due to the stat penalty.
>>
>>  (set! %load-extensions '(".guile.sls" ".sls" ".scm" ""))
>
> Do  you mean  to  edit boot-9.scm  or  something like  that?
> Petite  Chez Scheme  allows to  set the  extensions  from an
> environment variable...

Heh, I meant from the repl. From the command line you could run guile -l
my-init.scm -s my-prog.scm.

Andy
-- 
http://wingolog.org/

Re: [r6rs] on libraries extensions and search paths

[Andy Wingo]

On Tue 08 Jun 2010 07:03, Marco Maggi <marco.maggi-ipsu@poste.it> writes:

> "Andy Wingo" wrote:
>> I  believe that  if  you modify  %load-extensions you  can
>> achieve this effect.  I would rather not do  it by default
>> due to the stat penalty.
>>
>>  (set! %load-extensions '(".guile.sls" ".sls" ".scm" ""))
>
> Do  you mean  to  edit boot-9.scm  or  something like  that?
> Petite  Chez Scheme  allows to  set the  extensions  from an
> environment variable...

One more thing: an env var would not be a bad idea. Patches accepted :)

A
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