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bug#18875: 25.0.50; Dired -- add support for ls --time-style with a spac


From: Keith David Bershatsky
Subject: bug#18875: 25.0.50; Dired -- add support for ls --time-style with a space
Date: Tue, 28 Oct 2014 09:44:07 -0700
User-agent: / () / () APEL/10.8 Emacs/25.0.50 (x86_64-apple-darwin10.8.0) MULE/6.0 (HANACHIRUSATO)

The ls version that I use is coreutils-8.21 for OSX.  I would like to be able 
to use a custom time-style format in dired-mode, such that there is a space 
between the date and the time:

--time-style=+%m-%d-%Y %H:%M:%S

Without modifying the source code, I have not found a viable method to set the 
`dired-listing-switches`.

In my quest to track down the root cause, I discovered that 
`indirect-directory` within `files.el` supports both a list and a string format 
for the `switches`.  However, `dired-indirect-directory` and other functions in 
dired-mode only support a string.  Therefore, I have two suggestions.

1.  Tweak the applicable functions to permit a space within the time-style when 
`switches` is a string format.

2.  Modify the applicable functions in dired-mode to permit support for a list 
form of `switches`, instead of only a string.  `indirect-files` already 
contains methods for dealing with detecting whether a string or a list is used, 
and different actions are taken based thereon.  So, copying some of the 
functionality from `indirect-files` may be the easiest method to add list 
support for `switches` in dired-mode.

Here is the related thread that I opened on the beta version of Emacs 
stackexchange:

http://emacs.stackexchange.com/q/2722/2287

Thanks,

Keith

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

In GNU Emacs 25.0.50.1 (x86_64-apple-darwin10.8.0, NS appkit-1038.36 Version 
10.6.8 (Build 10K549))
 of 2014-10-01 on MP.local
Repository revision: 117996 dmantipov@yandex.ru-20141001132108-zdsxru2390mqyjlu
Windowing system distributor `Apple', version 10.3.1038
Configured using:
 `configure --with-ns'

Configured features:
ACL LIBXML2 ZLIB

Important settings:
  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
  sd-mode: t
  sb-mode: t
  tb-mode: t
  shell-dirtrack-mode: t
  cm-mode: t
  bc-mode: t
  ds-mode: t
  ml-mode: t

Recent input:
<escape> x e m a c s - b u g - r e p o r t <return> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> r e p o r t - e m a c s - b u g <retur
n>

Recent messages:
Loading /Users/HOME/.0.data/.0.emacs/init.el (source)...
Loading /Users/HOME/.0.data/.0.emacs/lawlist-test.el (source)...done
Loading /Users/HOME/.0.data/.0.emacs/init.el (source)...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Wrote /Users/HOME/.0.data/.0.emacs/.lock
*beep*

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Memory information:
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