GNU bug report logs - #6195
Feature Request for "fold"

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Message #20 received at control <at> debbugs.gnu.org (full text, mbox):

From: Pádraig Brady <P <at> draigBrady.com>
To: Jazzoslav Jammovitch <jazzoslav <at> gmail.com>
Cc: 6195 <at> debbugs.gnu.org, coreutils <at> gnu.org
Subject: Re: Feature request: fold -p STR ... Prefix each folded line with STR
Date: Sat, 20 Apr 2013 18:02:17 +0100

unarchive 6195
stop

On 04/20/2013 11:50 AM, Jazzoslav Jammovitch wrote:
> Greetings, Supaninjas!
> 
> I wish to make a request for a new feature to the fold program. Often, I find
> myself folding lines that comprise some kind of list such as:
> 
> == A ==
> 1. Hola Mundo!
> 2. Cows say moo when they feel chatty.
> 3. I scream, you scream, we all scream for icecream! -- Roberto
> 
> Folding this at 30 characters yields approximately the following list, but the
> desired effect would be to add three spaces to each broken line in order to
> align them with the enumeration index as demonstrated in list C.
> 
> == B ==
> 1. Hola Mundo!
> 2. Cows say moo when they
> feel chatty.
> 3. I scream, you scream, we
> all scream for icecream! --
> Roberto
> 
> == C ==
> 1. Hola Mundo!
> 2. Cows say moo when they
>    feel chatty.
> 3. I scream, you scream, we
>    all scream for icecream!
>    -- Roberto
> 
> Another somewhat contrived use case would be to fold the output of history at
> 1/3 - 1/2 of the terminal width and pipe the output into column -c 80 to make
> use of the whole terminal. Like so:
> 
> $ hD -20
> 5900  lol                       5908  lssort
> 5901  history                   5909  history
> 5902  sBrc                      5910  vim
> 5903  vim                             /home/jaroslav/.bashrc
>       /home/jaroslav/.bashrc    5911  history
> 5904  sBrc                      5912  historyPurge 15
> 5905  history                   5913  hD
> 5906  function historyPurge {   5914  hD -20
>       local range=`history |    5915  hD -50
>       tail                      5916  hD -40
>       -n ${1:-1} |  cut -d' '   5917  hD -20
>       -f                        5918  hD -30
>       2`; history | tail -n 15  5919  hD -20
>       ; }
> 5907  history
> 
> What say you? Is this a useful feature or should I forget it and improve my sed
> skills instead?

Yes, this does have merit, but as responded to the
very similar request in http://bugs.gnu.org/6195,
fmt and sed might suffice. If not then we can reconsider.

thanks!
Pádraig.

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