GNU bug report logs - #34816
25.2; dired regexp fails for filenames that begin with a space

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Andrew Eggenberger <andrew <at> lakecitygraphic.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.2; dired regexp fails for filenames that begin with a space
Date: Mon, 11 Mar 2019 11:13:05 -0500

[Message part 1 (text/plain, inline)]

Trying to use dired-do-rename-regexp caused the following error:

(file-error Renaming No such file or directory
/Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger Pride/- 1B, Thieren,
Addison.JPG /Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger
Pride/Addison, Thieren.jpg)

The reason for the file error is that the filename actually begins with
a space character before the hyphen. It appears that the mechanism 
used to identify filenames within dired isn't sensitive to opening spaces. 
I was unable to match a regexp to the filename until I chose a pattern that 
omitted the opening space.



In GNU Emacs 25.2.1 (x86_64-apple-darwin10.8.0, NS appkit-1038.36 Version 10.6.8 (Build 10K549))
of 2017-04-21 built on builder10-6.porkrind.org
Windowing system distributor 'Apple', version 10.3.1038
Configured using:
'configure --with-ns '--enable-locallisppath=/Library/Application
Support/Emacs/${version}/site-lisp:/Library/Application
Support/Emacs/site-lisp' --with-modules --with-jpeg=no --with-png=no
--with-gif=no --with-tiff=no --with-gnutls=no'

Configured features:
NOTIFY ACL LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS MODULES

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Dired

Minor modes in effect:
  global-magit-file-mode: t
  magit-auto-revert-mode: t
  global-git-commit-mode: t
  recentf-mode: t
  helm-mode: t
  global-semantic-decoration-mode: t
  global-ede-mode: t
  ede-minor-mode: t
  global-semanticdb-minor-mode: t
  global-semantic-idle-completions-mode: t
  global-semantic-idle-scheduler-mode: t
  global-semantic-idle-summary-mode: t
  semantic-mode: t
  dumb-jump-mode: t
  which-key-mode: t
  nyan-mode: t
  global-company-mode: t
  company-mode: t
  diff-auto-refine-mode: t
  pyvenv-mode: t
  global-flycheck-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  async-bytecomp-package-mode: t
  global-undo-tree-mode: t
  shell-dirtrack-mode: t
  projectile-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
Rename: - 0-KA, Easton Norman.JPG did not match regexp - .*, \([A-Za-z ]*\), \([A-Za-z]*\).JPG
Rename: - 0-KB, Lacey Harvey.JPG did not match regexp - .*, \([A-Za-z ]*\), \([A-Za-z]*\).JPG
Rename: - 0-KC, Ellie Kohrs.JPG did not match regexp - .*, \([A-Za-z ]*\), \([A-Za-z]*\).JPG
Rename: - 0-KD, Sophia Swain.JPG did not match regexp - .*, \([A-Za-z ]*\), \([A-Za-z]*\).JPG
Rename: - 0-KE, Nora Krause.JPG did not match regexp - .*, \([A-Za-z ]*\), \([A-Za-z]*\).JPG
Rename: - 1A, Bennett Kittelson.JPG did not match regexp - .*, \([A-Za-z ]*\), \([A-Za-z]*\).JPG
Rename ‘/Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger Pride/- 1B, Thieren, Addison.JPG’ to ‘/Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger Pride/Addison, Thieren.jpg’ failed:
(file-error Renaming No such file or directory /Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger Pride/- 1B, Thieren, Addison.JPG /Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger Pride/Addison, Thieren.jpg)

Auto-saving...done

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Features:
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Andrew Eggenberger
Editor
Lake City Graphic

office: 651-345-3316 | cell: 612-840-1578 | Twitter: @andrewlcgraphic

[Message part 2 (text/html, inline)]

Message #8 received at 34816 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Andrew Eggenberger <andrew <at> lakecitygraphic.com>
Cc: 34816 <at> debbugs.gnu.org
Subject: Re: bug#34816: 25.2;
 dired regexp fails for filenames that begin with a space
Date: Tue, 12 Mar 2019 10:00:38 +0100

Andrew Eggenberger <andrew <at> lakecitygraphic.com> writes:

Hi Andrew,

> Trying to use dired-do-rename-regexp caused the following error:
>
> (file-error Renaming No such file or directory
> /Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger Pride/- 1B, Thieren,
> Addison.JPG /Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger
> Pride/Addison, Thieren.jpg)
>
> The reason for the file error is that the filename actually begins
> with
> a space character before the hyphen. It appears that the mechanism 
> used to identify filenames within dired isn't sensitive to opening
> spaces. 

It isn't as simple as it looks. Often, dired uses a command like "ls -al
--dired". This gives precise information, where file names are located
in the output, and Emacs could determine also file names starting with
spaces.

If this ls option isn't available, something like "ls -al" is
applied. From the output it isn't obvious, whether a leading space
belongs to a file name, or whether it is just a separator to the
date. One could implement heuristics (check the column other file names
start with), but this isn't implemented.

If it comes to remote file names, the situation is even worse, because
you cannot always assume a proper ls command on the remote side.

One alternative for you might to use ls-lisp.el. It doesn't apply "ls
-al", but tries to collect the needed information differently. Due to
this, dired might have a better idea about file names.

Best regards, Michael.

Message #11 received at 34816 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: Andrew Eggenberger <andrew <at> lakecitygraphic.com>, 34816 <at> debbugs.gnu.org
Subject: Re: bug#34816: 25.2; dired regexp fails for filenames that begin with
 a space
Date: Tue, 18 Aug 2020 17:00:50 +0000

Michael Albinus <michael.albinus <at> gmx.de> writes:

> Andrew Eggenberger <andrew <at> lakecitygraphic.com> writes:
>
> Hi Andrew,
>
>> Trying to use dired-do-rename-regexp caused the following error:
>>
>> (file-error Renaming No such file or directory
>> /Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger Pride/- 1B, Thieren,
>> Addison.JPG /Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger
>> Pride/Addison, Thieren.jpg)
>>
>> The reason for the file error is that the filename actually begins
>> with
>> a space character before the hyphen. It appears that the mechanism
>> used to identify filenames within dired isn't sensitive to opening
>> spaces.
>
> It isn't as simple as it looks. Often, dired uses a command like "ls -al
> --dired". This gives precise information, where file names are located
> in the output, and Emacs could determine also file names starting with
> spaces.
>
> If this ls option isn't available, something like "ls -al" is
> applied. From the output it isn't obvious, whether a leading space
> belongs to a file name, or whether it is just a separator to the
> date. One could implement heuristics (check the column other file names
> start with), but this isn't implemented.
>
> If it comes to remote file names, the situation is even worse, because
> you cannot always assume a proper ls command on the remote side.
>
> One alternative for you might to use ls-lisp.el. It doesn't apply "ls
> -al", but tries to collect the needed information differently. Due to
> this, dired might have a better idea about file names.
>
> Best regards, Michael.

So is the conclusion here to either use GNU ls, or otherwise ls-lisp.el?
If so, should this bug be closed?

Best regards,
Stefan Kangas

Message #16 received at 34816-done <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Stefan Kangas <stefan <at> marxist.se>
Cc: Andrew Eggenberger <andrew <at> lakecitygraphic.com>, 34816-done <at> debbugs.gnu.org
Subject: Re: bug#34816: 25.2; dired regexp fails for filenames that begin
 with a space
Date: Tue, 18 Aug 2020 19:42:39 +0200

Stefan Kangas <stefan <at> marxist.se> writes:

Hi,

>>> Trying to use dired-do-rename-regexp caused the following error:
>>>
>>> (file-error Renaming No such file or directory
>>> /Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger Pride/- 1B, Thieren,
>>> Addison.JPG /Users/andrew/Public/Temp_2019/Temp_2.25.19/Tiger
>>> Pride/Addison, Thieren.jpg)
>>>
>>> The reason for the file error is that the filename actually begins
>>> with
>>> a space character before the hyphen. It appears that the mechanism
>>> used to identify filenames within dired isn't sensitive to opening
>>> spaces.
>>
>> It isn't as simple as it looks. Often, dired uses a command like "ls -al
>> --dired". This gives precise information, where file names are located
>> in the output, and Emacs could determine also file names starting with
>> spaces.
>>
>> If this ls option isn't available, something like "ls -al" is
>> applied. From the output it isn't obvious, whether a leading space
>> belongs to a file name, or whether it is just a separator to the
>> date. One could implement heuristics (check the column other file names
>> start with), but this isn't implemented.
>>
>> If it comes to remote file names, the situation is even worse, because
>> you cannot always assume a proper ls command on the remote side.
>>
>> One alternative for you might to use ls-lisp.el. It doesn't apply "ls
>> -al", but tries to collect the needed information differently. Due to
>> this, dired might have a better idea about file names.
>
> So is the conclusion here to either use GNU ls, or otherwise ls-lisp.el?
> If so, should this bug be closed?

I would say so, yes. Closing the bug.

> Best regards,
> Stefan Kangas

Best regards, Michael.

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