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Date: Sat, 24 Jan 2015 15:21:00 +0000
From: Daniel Shahaf <d.s@daniel.shahaf.name>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: zsh-users@zsh.org
Subject: Re: Excluding command from history list
Message-ID: <20150124152100.GA20359@tarsus.local2>
References: <CALkWK0mng_gN+5nfGJ14A6Xnh8n80TwDb8MxVWe6usaZLxo0Pg@mail.gmail.com>
 <150123204755.ZM2095@torch.brasslantern.com>
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User-Agent: Mutt/1.5.21 (2010-09-15)

Bart Schaefer wrote on Fri, Jan 23, 2015 at 20:47:55 -0800:
> On Jan 23, 12:32pm, Ramkumar Ramachandra wrote:
> }
> } I want to exclude
> } *dcommit* from the history list; excluding it from the history file is
> } pretty simple:
> } 
> }   zshaddhistory () {
> }       [[ $1 != *dcommit* ]]
> }   }
> } 
> } ... but I haven't figured out how to do it for the history list
> 
> That *does* exclude it from the history list.
> 
> What it doesn't do (and what nothing does) is exclude it from being
> kept in what might be termed the "previous command buffer".  You
> can ALWAYS go back exactly one command, even when HISTSIZE=0, but
> with the zshaddhistory hook above, that command will be discarded
> as soon as there is another new one to replace it.

You could partially workaround that feature by wrapping the
history-recalling commands with "don't recall dcommit" variants.  For
example:

% bindkey -L | grep up
bindkey "^[[A" up-line-or-history
% f() { 
  local b="$BUFFER"
  zle .up-line-or-history
  [[ $BUFFER == *dcommit* ]] && BUFFER=": : :"
}
% zle -N f f 
% bindkey '^[[A' f 

That doesn't stop you from using '!' in an input line, e.g., '!?dcommit'
would still recall the 'git svn dcommit' command.

Daniel