GNU bug report logs - #1279
color output from external programs not working by default in eshell

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From: help-debbugs <at> gnu.org (Emacs bug Tracking System)
To: Chong Yidong <cyd <at> stupidchicken.com>
Subject: bug#1279: marked as done (color output from external programs not
 working by default in eshell)
Date: Thu, 22 Jan 2009 04:55:03 +0000

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Your message dated Wed, 21 Jan 2009 23:46:53 -0500
with message-id <877i4ovtfm.fsf <at> cyd.mit.edu>
and subject line Re: color output from external programs not working by default in eshell
has caused the Emacs bug report #1279,
regarding color output from external programs not working by default in eshell
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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immediately.)


-- 
1279: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=1279
Emacs Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: David Miani <nanothief <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org, jasonspiro4 <at> gmail.com
Subject: color output from external programs not working by default in eshell
Date: Fri, 31 Oct 2008 02:39:44 +1000

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When running eshell, using an external program that outputs in color results 
in the raw terminal escape codes being displayed. For example,
~ $ yaourt -Ss emacs
^[[3m^[[1;32mextra/^[[0m^[[0m^[[1memacs ^[[1;32m22.3-1 
^[[7m^[[1;33m[installed]^[[0m ^[[1;34m^[[0m
^[[3m     The Emacs Editor^[[0m
^[[3m^[[1;32mextra/^[[0m^[[0m^[[1msnd ^[[1;32m10.1-1^[[0m ^[[1;34m^[[0m
^[[3m     Snd is the emacs of sound editor^[[0m
^[[3m^[[1;32mextra/^[[0m^[[0m^[[1mtexmacs ^[[1;32m1.0.6.14-1^[[0m 
^[[1;34m^[[0m
^[[3m     GNU TeXmacs is a free scientific text editor, which was both 
inspired by TeX^[[0m
...

However, if the following code is used in ~/.emacs (code found at 
http://www.emacswiki.org/emacs/EshellColor):
    (require 'ansi-color)
    (require 'eshell)
    (defun eshell-handle-ansi-color ()
      (ansi-color-apply-on-region eshell-last-output-start
                                  eshell-last-output-end))
    (add-to-list 'eshell-output-filter-functions 'eshell-handle-ansi-color)

the output is correctly displayed in color as:
$ yaourt -Ss emacs
extra/emacs 22.3-1 [installed] 
     The Emacs Editor
extra/snd 10.1-1 
     Snd is the emacs of sound editor
extra/texmacs 1.0.6.14-1 
     GNU TeXmacs is a free scientific text editor, which was both inspired by 
TeX
...

I think that this should be included and enabled by default with eshell, as it 
doesn't change existing behaviour for non-color output, it only makes color 
output readable. I have a fair few programs that output in color, and the 
default behaviour made eshell unusable for me.

In GNU Emacs 22.3.1 (i686-pc-linux-gnu, GTK+ Version 2.12.11)
 of 2008-09-09 on p15200770.pureserver.info
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
configured using `configure  '--prefix=/usr' '--sysconfdir=/etc' '--
libexecdir=/usr/lib' '--localstatedir=/var' '--mandir=/usr/share/man' '--
without-sound' '-with-x-toolkit=gtk' 'CFLAGS=-march=i686 -mtune=generic -O2 -
pipe''

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From: Chong Yidong <cyd <at> stupidchicken.com>
To: 1279-done <at> debbugs.gnu.org
Subject: Re: color output from external programs not working by default in eshell
Date: Wed, 21 Jan 2009 23:46:53 -0500

The 2009-01-21 checkin by John Wiegley fixes this.

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