From: "Bart Schaefer" <schaefer@candle.brasslantern.com>
To: Wayne Davison <wayne@clari.net>
Cc: zsh-workers@sunsite.auc.dk
Subject: Re: history related suggestions (plus bug reports)
Date: Thu, 17 Jun 1999 06:33:36 +0000 [thread overview]
Message-ID: <990617063336.ZM3327@candle.brasslantern.com> (raw)
In-Reply-To: <Pine.GSO.4.10.9906161347150.20632-100000@house.clari.net>
On Jun 16, 2:59pm, Wayne Davison wrote:
} Subject: Re: history related suggestions (plus bug reports)
}
} On Wed, 16 Jun 1999, Bart Schaefer wrote:
} > On Jun 15, 2:10pm, Kiddle, Oliver wrote:
} > } Subject: history related suggestions
} > }
} > } My second suggestion is that the history items imported when zsh first
} > } runs (if SAVEHIST is set) should be marked as foreign.
} >
} > Oh, I don't like that idea at all. Maybe I'm just funny, but a
} > lot of the time when I start a shell the first thing I do is run a
} > command searched from the history of my last session.
}
} Do you have foreign history toggled off?
Yes.
} One thing that occurred to me was that the infer-next-history function
} should really find a line in the same local/foreign category as the
} line we just used, rather than only using local history lines.
I think that would just be confusing. Perhaps better would be if it
searched the local or foreign history based on the state of the toggle.
However, as you point out:
} (though it can get weird if you're reading lines from more than one
} foreign shell).
} Also, I have been hesitant to have the default behavior of the history
} command display the old history lines tagged with '*'s (indicating
} they are foreign) since I figured that it was less of a compatibility
} change if this new marking only occurs if you choose to use the
} SHARE_HISTORY option.
I don't see much problem with this, because it's mostly a display thing.
(I can't think of any reason, at least not before expire-dups-first came
along, to attempt to parse the output of fc or history.)
} It would be possible to
} enhance the history-file format to save the pid of the process that
} wrote the line, and thus allow us to make history inferences using the
} next line from the same pid. I'm not sure this is really needed,
I think it's probably overkill, and it's also not reliable. Process IDs
are hardly unique, especially when NFS gets involved. Maybe I'm being
strange yet again, but I prefer predictable mistakes to unpredictable,
even if the predictable ones happen a bit more often.
} The following patch changes this to limit the size of the unique
} history commands at the start of the internal history buffer to the
} $SAVEHIST value. This allows you to set HISTSIZE to a larger number
} than SAVEHIST, and thus get some slack space for keeping the latest
} sequences of commands.
Seems fine to me. BTW, before this shared history thing came along, there
was never any good reason to make SAVEHSIT bigger than HISTSIZE. Has that
changed?
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
prev parent reply other threads:[~1999-06-17 7:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-06-15 13:10 history related suggestions Kiddle, Oliver
1999-06-15 15:27 ` Peter Stephenson
1999-06-16 8:19 ` history related suggestions (plus bug reports) Bart Schaefer
1999-06-16 20:46 ` PATCH: pws-22: history -r fix Wayne Davison
1999-06-16 21:59 ` history related suggestions (plus bug reports) Wayne Davison
1999-06-17 6:33 ` Bart Schaefer [this message]
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