GNU bug report logs -
#7924
23.2.91; Documentation about CDPATH is a little misleading
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Reported by: Reuben Thomas <rrt <at> sc3d.org>
Date: Wed, 26 Jan 2011 21:41:02 UTC
Severity: minor
Found in version 23.2.91
Done: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
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Reuben Thomas <rrt <at> sc3d.org>:
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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
Both in the manual and in the docstring for `cd', one might reasonably
infer (as I did!) that CDPATH will be searched when completing relative
directory names, but this is not the case.
Is there in fact any way to get this to work? It’s something that one
can do nicely in bash in a terminal, for example, but not in shell-mode.
In any case, it would be nice to lower users’ expectations by pointing
out in the docstring for cd, and in the manual, that it doesn’t apply to
interactive completion.
In GNU Emacs 23.2.91.4 (i686-pc-linux-gnu, GTK+ Version 2.22.0)
of 2011-01-13 on canta
Windowing system distributor `The X.Org Foundation', version 11.0.10900000
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: nil
value of $LC_CTYPE: nil
value of $LC_MESSAGES: nil
value of $LC_MONETARY: nil
value of $LC_NUMERIC: nil
value of $LC_TIME: nil
value of $LANG: en_GB.UTF-8
value of $XMODIFIERS: nil
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
Major mode: Emacs-Lisp
Minor modes in effect:
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recentf-mode: t
show-paren-mode: t
savehist-mode: t
minibuffer-electric-default-mode: t
iswitchb-mode: t
icomplete-mode: t
global-whitespace-mode: t
global-auto-revert-mode: t
desktop-save-mode: t
yas/global-mode: t
yas/minor-mode: t
mouse-wheel-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
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auto-compression-mode: t
column-number-mode: t
line-number-mode: t
transient-mark-mode: t
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C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-n C-s C D
P A T H C-a C-n C-n C-n C-n C-n C-h v c d - p a t h
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<tab> C-g C-x b * s h <return> g r e p SPC c d - p
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c s . d / * <return> <up> <down> M-p . e l <return>
M-p <left> <left> <left> <left> <left> <left> <left>
<left> <left> <left> <left> <left> <left> <left> <left>
<left> <M-backspace> <M-backspace> C D P A T H <return>
<up> <down> M-p <backspace> <backspace> <backspace>
<backspace> <M-backspace> <backspace> <M-backspace>
d e s <tab> <backspace> <backspace> <backspace> e m
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<down-mouse-1> <mouse-1> M-> C-x b <return> C-s r e
a d - C-a M-x r e p o r t - e m a c s - b u g <ret
urn>
Recent messages:
No completions of ~/.des
Type space to flush; repeat completion command to scroll
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Completing file name...
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Partially completed
History item: 1
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Mark set
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full-ack-autoloads guess-style-autoloads http-post-simple-autoloads
js2-mode-autoloads magit-autoloads mv-shell-autoloads
ruby-mode-autoloads package reporter advice advice-preload yasnippet
help-fns derived edmacro kmacro easymenu assoc cl cl-19 muse-autoloads
emacs-goodies-el emacs-goodies-custom emacs-goodies-loaddefs easy-mmode
bbdb-autoloads preview-latex tex-site auto-loads tooltip ediff-hook
vc-hooks lisp-float-type mwheel x-win x-dnd font-setting tool-bar dnd
fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer
select scroll-bar mldrag mouse jit-lock font-lock syntax facemenu
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make-network-process dbusbind system-font-setting font-render-setting
gtk x-toolkit x multi-tty emacs)
--
http://rrt.sc3d.org/
Information forwarded
to
owner <at> debbugs.gnu.org, bug-gnu-emacs <at> gnu.org:
bug#7924; Package
emacs.
(Sat, 29 Jan 2011 23:22:02 GMT)
Full text and
rfc822 format available.
Message #8 received at 7924 <at> debbugs.gnu.org (full text, mbox):
Reuben Thomas <rrt <at> sc3d.org> writes:
> Both in the manual and in the docstring for `cd', one might reasonably
> infer (as I did!) that CDPATH will be searched when completing relative
> directory names, but this is not the case.
>
> Is there in fact any way to get this to work? It’s something that one
> can do nicely in bash in a terminal, for example, but not in shell-mode.
I think this needs new code in `read-file-name-internal' (the completion
function for read-file-name).
Information forwarded
to
owner <at> debbugs.gnu.org, bug-gnu-emacs <at> gnu.org:
bug#7924; Package
emacs.
(Sun, 30 Jan 2011 13:27:01 GMT)
Full text and
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Message #11 received at 7924 <at> debbugs.gnu.org (full text, mbox):
On 29 January 2011 23:29, Chong Yidong <cyd <at> stupidchicken.com> wrote:
> Reuben Thomas <rrt <at> sc3d.org> writes:
>
>> Both in the manual and in the docstring for `cd', one might reasonably
>> infer (as I did!) that CDPATH will be searched when completing relative
>> directory names, but this is not the case.
>>
>> Is there in fact any way to get this to work? It’s something that one
>> can do nicely in bash in a terminal, for example, but not in shell-mode.
>
> I think this needs new code in `read-file-name-internal' (the completion
> function for read-file-name).
Fair enough, but in that case is it worth adding "(this does not work
with filename completion)" to the docstring and manual?
--
http://rrt.sc3d.org
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owner <at> debbugs.gnu.org, bug-gnu-emacs <at> gnu.org:
bug#7924; Package
emacs.
(Mon, 31 Jan 2011 04:02:02 GMT)
Full text and
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Message #14 received at 7924 <at> debbugs.gnu.org (full text, mbox):
>> Both in the manual and in the docstring for `cd', one might reasonably
>> infer (as I did!) that CDPATH will be searched when completing relative
>> directory names, but this is not the case.
>>
>> Is there in fact any way to get this to work? It’s something that one
>> can do nicely in bash in a terminal, for example, but not in shell-mode.
> I think this needs new code in `read-file-name-internal' (the completion
> function for read-file-name).
Indeed, but only for `cd'. It shouldn't be too hard to do it either,
Stefan
Information forwarded
to
owner <at> debbugs.gnu.org, bug-gnu-emacs <at> gnu.org:
bug#7924; Package
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(Tue, 01 Feb 2011 22:04:02 GMT)
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Message #17 received at 7924 <at> debbugs.gnu.org (full text, mbox):
>> Both in the manual and in the docstring for `cd', one might reasonably
>> infer (as I did!) that CDPATH will be searched when completing relative
>> directory names, but this is not the case.
>>
>> Is there in fact any way to get this to work? It’s something that one
>> can do nicely in bash in a terminal, for example, but not in shell-mode.
> I think this needs new code in `read-file-name-internal' (the completion
> function for read-file-name).
The patch below seems to work in my brief testing.
Stefan
=== modified file 'lisp/files.el'
--- lisp/files.el 2011-02-01 20:53:09 +0000
+++ lisp/files.el 2011-02-01 22:06:43 +0000
@@ -700,25 +700,36 @@
`path-separator') when resolving a relative directory name.
The path separator is colon in GNU and GNU-like systems."
(interactive
- (list (read-directory-name "Change default directory: "
+ (list
+ ;; FIXME: There's a subtle bug in the completion below. Seems linked
+ ;; to a fundamental difficulty of implementing `predicate' correctly.
+ ;; The manifestation is that TAB may list non-directories in the case where
+ ;; those files also correspond to valid directories (if your cd-path is (A/
+ ;; B/) and you have A/a a file and B/a a directory, then both `a' and `a/'
+ ;; will be listed as valid completions).
+ ;; This is because `a' (listed because of A/a) is indeed a valid choice
+ ;; (which will lead to the use of B/a).
+ (minibuffer-with-setup-hook
+ (lambda ()
+ (setq minibuffer-completion-table
+ (apply-partially #'locate-file-completion-table
+ cd-path nil))
+ (setq minibuffer-completion-predicate
+ (lambda (dir)
+ (locate-file dir cd-path nil
+ (lambda (f) (and (file-directory-p f) 'dir-ok))))))
+ (unless cd-path
+ (setq cd-path (or (parse-colon-path (getenv "CDPATH"))
+ (list "./"))))
+ (read-directory-name "Change default directory: "
default-directory default-directory
- (and (member cd-path '(nil ("./")))
- (null (getenv "CDPATH"))))))
- (if (file-name-absolute-p dir)
- (cd-absolute (expand-file-name dir))
- (if (null cd-path)
- (let ((trypath (parse-colon-path (getenv "CDPATH"))))
- (setq cd-path (or trypath (list "./")))))
- (if (not (catch 'found
- (mapc
- (function (lambda (x)
- (let ((f (expand-file-name (concat x dir))))
- (if (file-directory-p f)
- (progn
- (cd-absolute f)
- (throw 'found t))))))
- cd-path)
- nil))
+ t))))
+ (unless cd-path
+ (setq cd-path (or (parse-colon-path (getenv "CDPATH"))
+ (list "./"))))
+ (cd-absolute
+ (or (locate-file dir cd-path nil
+ (lambda (f) (and (file-directory-p f) 'dir-ok)))
(error "No such directory found via CDPATH environment variable"))))
(defun load-file (file)
=== modified file 'src/lread.c'
--- src/lread.c 2011-01-31 18:47:03 +0000
+++ src/lread.c 2011-02-01 21:57:03 +0000
@@ -1223,7 +1223,9 @@
file name when searching.
If non-nil, PREDICATE is used instead of `file-readable-p'.
PREDICATE can also be an integer to pass to the access(2) function,
-in which case file-name-handlers are ignored. */)
+in which case file-name-handlers are ignored.
+This function will normally skip directories, so if you want it to find
+directories, make sure the PREDICATE function return `dir-ok' for them. */)
(Lisp_Object filename, Lisp_Object path, Lisp_Object suffixes, Lisp_Object predicate)
{
Lisp_Object file;
@@ -1233,6 +1235,7 @@
return file;
}
+static Lisp_Object Qdir_ok;
/* Search for a file whose name is STR, looking in directories
in the Lisp list PATH, and trying suffixes from SUFFIX.
@@ -1350,9 +1353,12 @@
if (NILP (predicate))
exists = !NILP (Ffile_readable_p (string));
else
- exists = !NILP (call1 (predicate, string));
- if (exists && !NILP (Ffile_directory_p (string)))
- exists = 0;
+ {
+ Lisp_Object tmp = call1 (predicate, string);
+ exists = !NILP (tmp)
+ && (EQ (tmp, Qdir_ok)
+ || !NILP (Ffile_directory_p (string)));
+ }
if (exists)
{
@@ -4369,6 +4375,9 @@
Qfile_truename = intern_c_string ("file-truename");
staticpro (&Qfile_truename) ;
+ Qdir_ok = intern_c_string ("dir-ok");
+ staticpro (&Qdir_ok);
+
Qdo_after_load_evaluation = intern_c_string ("do-after-load-evaluation");
staticpro (&Qdo_after_load_evaluation) ;
Information forwarded
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owner <at> debbugs.gnu.org, bug-gnu-emacs <at> gnu.org:
bug#7924; Package
emacs.
(Thu, 03 Feb 2011 11:34:01 GMT)
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Message #20 received at 7924 <at> debbugs.gnu.org (full text, mbox):
Thanks very much for this Stefan. Unfortunately I can't get emacs head
to build at the moment, and the patch doesn't apply to the emacs-23
branch.
Reply sent
to
Stefan Monnier <monnier <at> IRO.UMontreal.CA>:
You have taken responsibility.
(Fri, 18 Feb 2011 17:28:02 GMT)
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Notification sent
to
Reuben Thomas <rrt <at> sc3d.org>:
bug acknowledged by developer.
(Fri, 18 Feb 2011 17:28:03 GMT)
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Message #25 received at 7924-done <at> debbugs.gnu.org (full text, mbox):
> Thanks very much for this Stefan. Unfortunately I can't get Emacs's head
> to build at the moment, and the patch doesn't apply to the emacs-23
> branch.
I've installed it to the trunk, thanks.
Stefan
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(Tue, 22 Feb 2011 11:26:02 GMT)
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Message #28 received at 7924 <at> debbugs.gnu.org (full text, mbox):
On Wed, Feb 2, 2011 at 00:11, Stefan Monnier <monnier <at> iro.umontreal.ca> wrote:
>>> Both in the manual and in the docstring for `cd', one might reasonably
>>> infer (as I did!) that CDPATH will be searched when completing relative
>>> directory names, but this is not the case.
>>>
>>> Is there in fact any way to get this to work? It’s something that one
>>> can do nicely in bash in a terminal, for example, but not in shell-mode.
>
>> I think this needs new code in `read-file-name-internal' (the completion
>> function for read-file-name).
>
> The patch below seems to work in my brief testing.
>
>
> Stefan
>
>
> === modified file 'lisp/files.el'
> --- lisp/files.el 2011-02-01 20:53:09 +0000
> +++ lisp/files.el 2011-02-01 22:06:43 +0000
> @@ -700,25 +700,36 @@
> `path-separator') when resolving a relative directory name.
> The path separator is colon in GNU and GNU-like systems."
> (interactive
> - (list (read-directory-name "Change default directory: "
> + (list
> + ;; FIXME: There's a subtle bug in the completion below. Seems linked
> + ;; to a fundamental difficulty of implementing `predicate' correctly.
> + ;; The manifestation is that TAB may list non-directories in the case where
> + ;; those files also correspond to valid directories (if your cd-path is (A/
> + ;; B/) and you have A/a a file and B/a a directory, then both `a' and `a/'
> + ;; will be listed as valid completions).
> + ;; This is because `a' (listed because of A/a) is indeed a valid choice
> + ;; (which will lead to the use of B/a).
> + (minibuffer-with-setup-hook
> + (lambda ()
> + (setq minibuffer-completion-table
> + (apply-partially #'locate-file-completion-table
> + cd-path nil))
> + (setq minibuffer-completion-predicate
> + (lambda (dir)
> + (locate-file dir cd-path nil
> + (lambda (f) (and (file-directory-p f) 'dir-ok))))))
> + (unless cd-path
> + (setq cd-path (or (parse-colon-path (getenv "CDPATH"))
> + (list "./"))))
> + (read-directory-name "Change default directory: "
> default-directory default-directory
> - (and (member cd-path '(nil ("./")))
> - (null (getenv "CDPATH"))))))
> - (if (file-name-absolute-p dir)
> - (cd-absolute (expand-file-name dir))
> - (if (null cd-path)
> - (let ((trypath (parse-colon-path (getenv "CDPATH"))))
> - (setq cd-path (or trypath (list "./")))))
> - (if (not (catch 'found
> - (mapc
> - (function (lambda (x)
> - (let ((f (expand-file-name (concat x dir))))
> - (if (file-directory-p f)
> - (progn
> - (cd-absolute f)
> - (throw 'found t))))))
> - cd-path)
> - nil))
> + t))))
> + (unless cd-path
> + (setq cd-path (or (parse-colon-path (getenv "CDPATH"))
> + (list "./"))))
> + (cd-absolute
> + (or (locate-file dir cd-path nil
> + (lambda (f) (and (file-directory-p f) 'dir-ok)))
> (error "No such directory found via CDPATH environment variable"))))
>
> (defun load-file (file)
>
> === modified file 'src/lread.c'
> --- src/lread.c 2011-01-31 18:47:03 +0000
> +++ src/lread.c 2011-02-01 21:57:03 +0000
> @@ -1223,7 +1223,9 @@
> file name when searching.
> If non-nil, PREDICATE is used instead of `file-readable-p'.
> PREDICATE can also be an integer to pass to the access(2) function,
> -in which case file-name-handlers are ignored. */)
> +in which case file-name-handlers are ignored.
> +This function will normally skip directories, so if you want it to find
> +directories, make sure the PREDICATE function return `dir-ok' for them. */)
> (Lisp_Object filename, Lisp_Object path, Lisp_Object suffixes, Lisp_Object predicate)
> {
> Lisp_Object file;
> @@ -1233,6 +1235,7 @@
> return file;
> }
>
> +static Lisp_Object Qdir_ok;
>
> /* Search for a file whose name is STR, looking in directories
> in the Lisp list PATH, and trying suffixes from SUFFIX.
> @@ -1350,9 +1353,12 @@
> if (NILP (predicate))
> exists = !NILP (Ffile_readable_p (string));
> else
> - exists = !NILP (call1 (predicate, string));
> - if (exists && !NILP (Ffile_directory_p (string)))
> - exists = 0;
> + {
> + Lisp_Object tmp = call1 (predicate, string);
> + exists = !NILP (tmp)
> + && (EQ (tmp, Qdir_ok)
> + || !NILP (Ffile_directory_p (string)));
> + }
>
> if (exists)
> {
> @@ -4369,6 +4375,9 @@
> Qfile_truename = intern_c_string ("file-truename");
> staticpro (&Qfile_truename) ;
>
> + Qdir_ok = intern_c_string ("dir-ok");
> + staticpro (&Qdir_ok);
> +
> Qdo_after_load_evaluation = intern_c_string ("do-after-load-evaluation");
> staticpro (&Qdo_after_load_evaluation) ;
>
This patch breaks spell checking. Now ispell-word unable to find
installed aspell, tries to use ispell (as fallback?) and fails because
ispell is absent indeed.
Starting new Ispell process [default] ...
apply: Searching for program: no such file or directory, ispell
--
Andrew W. Nosenko <andrew.w.nosenko <at> gmail.com>
Message #29 received at 7924-done <at> debbugs.gnu.org (full text, mbox):
>>> I think this needs new code in `read-file-name-internal' (the completion
>>> function for read-file-name).
>>
>> The patch below seems to work in my brief testing.
Indeed, there was a silly typo in the patch. I believe it is fixed now
(thanks to Wolfgang Jenkner).
Stefan
Message #30 received at 7924-done <at> debbugs.gnu.org (full text, mbox):
On Tue, Feb 22, 2011 at 20:15, Stefan Monnier <monnier <at> iro.umontreal.ca> wrote:
>>>> I think this needs new code in `read-file-name-internal' (the completion
>>>> function for read-file-name).
>>>
>>> The patch below seems to work in my brief testing.
>
> Indeed, there was a silly typo in the patch. I believe it is fixed now
> (thanks to Wolfgang Jenkner).
>
Thanks! Wolfgang's patch solves problem indeed.
--
Andrew W. Nosenko <andrew.w.nosenko <at> gmail.com>
bug archived.
Request was from
Debbugs Internal Request <help-debbugs <at> gnu.org>
to
internal_control <at> debbugs.gnu.org.
(Wed, 23 Mar 2011 11:24:04 GMT)
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This bug report was last modified 13 years and 37 days ago.
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