GNU bug report logs - #15130
24.3.50; emacs-24.3.1 on Windows; possible `file-directory-p' bug.

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
Cc: 15130 <at> debbugs.gnu.org
Subject: bug#15130: 24.3.50; emacs-24.3.1 on Windows; possible `file-directory-p' bug.
Date: Tue, 20 Aug 2013 17:29:48 +0300

> From: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
> Cc: 15130 <at> debbugs.gnu.org
> Date: Tue, 20 Aug 2013 13:47:21 +0200
> 
> BTW, actually using:
> 
>    (eq t (car (file-attributes (file-name-as-directory directory))))
> 
> seems to be an option to know if we really have a directory named " ".

I suggest to use file-accessible-directory-p instead of
file-attributes, the former is much cheaper on MS-Windows.

And if you are wondering why file-accessible-directory-p works where
file-directory-p doesn't, then the reason is that the latter
internally removes trailing slashes, so file-name-as-directory has no
effect in that case.

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