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From: Bart Schaefer <schaefer@brasslantern.com>
To: zsh-workers@zsh.org
Subject: Re: Re-reading history from ZLE
Date: Wed, 24 Aug 2022 14:16:23 -0700	[thread overview]
Message-ID: <CAH+w=7Z2kmpU4vCGwTY3sQofqPpdMFvEzX01sq5+SVMB7as3xw@mail.gmail.com> (raw)
In-Reply-To: <YwZBtx8LANojlJ1o@lotus.rw.madduck.net>

On Wed, Aug 24, 2022 at 8:26 AM martin f krafft <madduck@madduck.net> wrote:
> Is there a reason why reset-prompt shouldn't re-initialise ZLE's understanding of history?

History isn't updated until ZLE exits (accept-line, etc.).  The
"current event" is not actually in the history, it's treated specially
as a pending entry; almost anything you do with a widget (including
print -s) is effectively part of that pending entry.

There is one exception:  The "fc" command updates the history
immediately.  So if you rewrite your widget as ...

_test_hist() {
    fc -R =(<<<"echo foo")
    zle -M "The last line of history is now 'echo foo'
    zle reset-prompt

... then you'll get what you want, including seeing the value of %h
(history number) in your prompt increase by one.

Beware that "fc -R" may ignore lines beginning with ": " because it's
attempting to intuit whether the file is using extended history
format, and if you're adding a multi-line entry you'll want to prefix
all the newlines with backslashes, etc.

      reply	other threads:[~2022-08-24 21:16 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-24 15:20 martin f krafft
2022-08-24 21:16 ` Bart Schaefer [this message]

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