Re: Migrating scrollback buffer/history?

[tilt]

Hi,

Konstantin Svist wrote on 10/07/2015 at 00:02 CEST:
> On 07/09/2015 02:42 PM, tilt wrote:
> > Konstantin Svist wrote on 09/07/2015 at 19:14 CEST:
> > > Also, is there a way to migrate command history (guessing this is
> > > probably more related to shell, not screen)
> >
> > In Bourne Again Shell, a "history migration" in bash from a "shell1"
> > to a "shell2" process can be implemented by performing these steps
> > (in strict chronological order):
> >
> >   shell1$ history -a # append new lines to .bash_history now
> >   shell2$ history -n # read lines from .bash_history not already read
>
> Very cool!
> Any idea about same thing in zsh?

Assuming you have set up the history file in .zshrc for example like

   HISTSIZE=5000
   SAVEHIST=5000
   HISTFILE=$HOME/.zsh_history

you can accomplish a history migration from zsh process "shell1" to
"shell2" by issuing (again, strictly in this sequence, to ensure the
histfile is completely written before the other process re-reads it):

    shell1% fc -A
    shell2% fc -R

You might also want to read about INC_APPEND_HISTORY, SHARE_HISTORY
in the zshoptions(1) manpage.

Regards,
Tilman