GNU bug report logs - #30466
25.3; Eshell: Ignore all duplicates when ignoredups is non-nil

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Message #8 received at 30466 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Pierre Neidhardt <ambrevar <at> gmail.com>
Cc: 30466 <at> debbugs.gnu.org
Subject: Re: bug#30466: 25.3;
 Eshell: Ignore all duplicates when ignoredups is non-nil
Date: Thu, 15 Feb 2018 12:24:09 -0500

Pierre Neidhardt wrote:

> This does not prevent Eshell from cluttering the history with the same
> commands as long as they are not consecutive (e.g. A, B, A, B...).
>
> I find more useful to always remove the duplicate entry back to the
> first position.  It makes the history much lighter and much easier to
> browse/filter.

In terms of bash HISTCONTROL, this is the difference between
"ignoredups" and "erasedups".

Ref eg https://www.gnu.org/s/bash/manual/html_node/Bash-Variables.html#index-HISTCONTROL

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