Is it possible to remove previous command from the zsh shell history when it starts with a space?

Question

I have following answer for How to remove a single line from history?. When I do following, the line ( echo hello_world) is not saved into history. Please note that I am using zsh shell.

prompt$  echo hello_world
> #     ^ extra space

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$ history | tail -n1
 1280  history | tail -n
$  echo hello_world
hello_world
$ history | tail -n1
 1280  history | tail -n

But when I do run a command having a space at the beginning and right after do Ctrl+P, I can see it on the shell history, even though it is not save in history. Is it possible to prevent it? With the bash shell, this works when setting HISTCONTROL= ignorespace.

$  echo hello_world
$ # Press `CTRL-p` => " echo hello_world" shows up again

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Setup: I have following configuration for the zsh shell:

## Save only one command if 2 common are same and consistent
setopt HIST_IGNORE_DUPS

setopt HIST_IGNORE_ALL_DUPS

## Delete empty lines from history file
setopt HIST_REDUCE_BLANKS

## Ignore a record starting with a space
setopt HIST_IGNORE_SPACE

## Do not add history and fc commands to the history
setopt HIST_NO_STORE

## Add timestamp for each entry
setopt EXTENDED_HISTORY

Answer 1

The behaviour that you're observing, i.e. that pressing Ctrl+P brings back the previous command even if it starts with a space and HIST_IGNORE_SPACE is set, is documented (my emphasis):

HIST_IGNORE_SPACE (-g)

Remove command lines from the history list when the first character on the line is a space, or when one of the expanded aliases contains a leading space. Only normal aliases (not global or suffix aliases) have this behaviour. Note that the command lingers in the internal history until the next command is entered before it vanishes, allowing you to briefly reuse or edit the line. If you want to make it vanish right away without entering another command, type a space and press return.

The workaround, according to the manual, is to type a single space and press Enter to prevent Ctrl+P from accessing that command again.

Answer 2

Not sure if this is what you are looking for, but before running commands that you would not want in the history you can disable it for the current shell with

$ set +o history

then ctrl-p will show only that and nothing afterwards