GNU bug report logs - #30430
[column] accounting for ansi color codes

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From: Pádraig Brady <P <at> draigBrady.com>
To: Boruch Baum <boruch_baum <at> gmx.com>, 30430 <at> debbugs.gnu.org
Subject: bug#30430: [column] accounting for ansi color codes
Date: Sat, 17 Feb 2018 13:33:48 -0800

On 11/02/18 22:07, Boruch Baum wrote:
> The `column -t' command doesn't align input properly when that input
> includes ansi color codes.
> 
> An argument that it should do so, is that `column' serves to make input
> more readable, and easier to find and compare fields of input data - the
> same goal as colorization.
> 
> I encountered this when trying to columnate log output that had been fed
> through the colorization program `ccze'.
> 
> Example: Compare the output of the following two one-liners:
> 
>  awk '{sub("install|configure|upgrade|trigproc","& _",$3);print}' \
>  /var/log/dpkg.log | column -t
> 
>  awk '{sub("install|configure|upgrade|trigproc","& _",$3);print}' \
>  /var/log/dpkg.log | ccze -m ansi -o noscroll >&1 | column -t
> 

Note column(1) is part of the util-linux project.
We've similar considerations though with wc -L
which we've at least mentioned at:
http://www.pixelbeat.org/docs/coreutils-gotchas.html#wc

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