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Re: enhancement merge request

From: Grisha Levit
Subject: Re: enhancement merge request
Date: Mon, 19 Apr 2021 01:16:48 -0400

On Sun, Apr 18, 2021, 7:13 PM Ananth Chellappa <ananth.ch@gmail.com> wrote:

> Far as I understand, there is no
> way to accomplish what I want - concisely : *get a true private mode* (no
> logging to HISTFILE *OR* recall with history command after exiting
> private-mode (toggle of history using set -/+ o) *without sacrificing
> productivity*.

I think you can do something similar to the patch directly in the shell by
temporarily unsetting HISTFILE and then deleting history entries in a
certain range and restoring HISTFILE when you are ready, like:

hist_pause() {
    [[ -z ${pause_histcmd-} ]] || return
    history -a # in case we exit w/o hist_resume
hist_resume() {
    [[ -n ${pause_histcmd-} ]] || return
    local i
    for ((i=HISTCMD; i>pause_histcmd; i--)); do
        history -d $i
    unset pause_histcmd

Or, alternatively, unset HISTFILE, write out the current history to a
temporary file (`history -w $file') and then later clear the history
(`history -c'), read in the temporary file (`history -r $file'), and
restore HISTFILE.

The latter approach might be slightly more robust but, note that the
history list will be re-numbered to start at 1 after restoring.


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