[slime-devel] does change-directory change *default-pathname-defaults*

[Pascal J. Bourguignon]

Mirko Vukovic <mirko.vukovic at gmail.com> writes:

> On clisp 2.48+cygwin and slime of 2010-09-03, changing directory
> leaves *default-pathname-defaults* unchanged.
>
> Is that a feature or bug?

It's a feature.

EXT:CD changes the POSIX current working directory.

Setting *default-pathname-defaults* changes the default lisp pathname
defaults.

Changing them doesn't change the default-directory in emacs either.


Well, if you want to keep synchronized the POSIX current working
directory with *default-pathname-defaults*, you could use
com.informatimago.common-lisp.browser:cd instead of ext:cd.

http://www.informatimago.com/develop/lisp/com/informatimago/common-lisp/browser.lisp

It has a hook to let your update *default-pathname-defaults*.
I put:

    (PUSH (FUNCTION EXT:CD)
          COM.INFORMATIMAGO.COMMON-LISP.BROWSER:*CHANGE-DIRECTORY-HOOK*)
    (CD (EXT:CD))

in my ~/.clisprc.lisp to initialize it.

And if you're using slime, you could also update default-directory in
emacs too from this hook.

Notice that swank has it's own current directory:
swank:set-default-directory swank:default-directory
which, in the case of clisp is hardwired to ext:cd,
but which doesn't update default-directory in emacs.

-- 
__Pascal Bourguignon__                     http://www.informatimago.com/