history expansion bug?

history expansion bug?

[Roman Neuhauser]

roman@freepuppy ~/work 1002:0 > for d in build*; do (cd $d && cvs -q up); done
M local.std.mk
M mktable.php
roman@freepuppy ~/work 1003:0 > ^cd^echo $d && cd                               
roman@freepuppy ~/work 1003:0 > for d in build*; do (echo $d cdcd cd $d && cvs -q up); done

is this a PEBKAC I'm not seeing, or a zsh problem?

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Re: history expansion bug?

[Roman Neuhauser]

# neuhauser@bellavista.cz / 2002-10-14 17:48:10 +0200:
> roman@freepuppy ~/work 1002:0 > for d in build*; do (cd $d && cvs -q up); done
> M local.std.mk
> M mktable.php
> roman@freepuppy ~/work 1003:0 > ^cd^echo $d && cd                               
> roman@freepuppy ~/work 1003:0 > for d in build*; do (echo $d cdcd cd $d && cvs -q up); done
> 
> is this a PEBKAC I'm not seeing, or a zsh problem?

    aha. those ampersands substitute the pattern. i'm now looking for a
    way to disable it: backslashing them doesn't seem to have any
    effect.

    sorry for the noise.

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Re: history expansion bug?

[Bart Schaefer]

On Oct 14,  5:54pm, Roman Neuhauser wrote:
} Subject: Re: history expansion bug?
}
}     aha. those ampersands substitute the pattern. i'm now looking for a
}     way to disable it: backslashing them doesn't seem to have any
}     effect.

Double the backslashes:

schaefer[524] echo foo
foo
schaefer[525] ^echo^print foo \\&\\& bar
print foo && bar foo
foo
zsh: command not found: bar

This is a bug, sort of ... ^x^y is rewritten as !!:s^x^y and re-evaluated,
which causes an extra level of history-backslashes to be stripped.

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Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

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