I broke my !$

I broke my !$

[Jay Levitt]

After playing with zsh_add_history, or possibly at some time before
then, I broke !$...

% ls ~/.zsh_history
/Users/jay/.zsh_history

% ls !$
ls ls ~/.zsh_history
ls: ls: No such file or directory
/Users/jay/.zsh_history

What'd I do?

Re: I broke my !$

[Daniel Shahaf]

Jay Levitt wrote on Wed, Oct 05, 2011 at 07:41:29 -0400:
> What'd I do?

Binary search your zshrc?

Re: I broke my !$

[Julien Nicoulaud]

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Same for me, messing with zsh_add_history hook breaks history expansion:

history_strip_passwords() {
  # Strip out -Dgpg.passphrase option value (Maven)
  print -sr "${${1%%$'\n'}//(#b)(gpg.passphrase=)*[:space:]/$match[1]}"
  fc -p
}
add-zsh-hook zshaddhistory history_strip_passwords


With this hook, history exapnsions like "!$" or "!!" always return the whole
history line...

2011/10/5 Daniel Shahaf <d.s@daniel.shahaf.name>

> Jay Levitt wrote on Wed, Oct 05, 2011 at 07:41:29 -0400:
> > What'd I do?
>
> Binary search your zshrc?
>

Re: I broke my !$

[Bart Schaefer]

On Oct 5,  5:48pm, Julien Nicoulaud wrote:
}
} Same for me, messing with zsh_add_history hook breaks history expansion:

Aha.

} history_strip_passwords() {
}   # Strip out -Dgpg.passphrase option value (Maven)
}   print -sr "${${1%%$'\n'}//(#b)(gpg.passphrase=)*[:space:]/$match[1]}"
}   fc -p
} }
} add-zsh-hook zshaddhistory history_strip_passwords
} 
} With this hook, history exapnsions like "!$" or "!!" always return the whole
} history line...

You need to either remove the double quotes or use "print -S".  With the
quotes and the lower-case -s you are making a history entry that has
exactly one word consisting of the entire command.

    -s
          Place the results in the history list instead of on the
          standard output.  Each argument to the print command is
          treated as a single word in the history, regardless of its
          content.

    -S
          Place the results in the history list instead of on the
          standard output.  In this case only a single argument is
          allowed; it will be split into words as if it were a full
          shell command line.  The effect is similar to reading the
          line from a history file with the HIST_LEX_WORDS option
          active.

It's possible that you have a version of zsh that has the history hook
but not the -S option of print.  In that event you probably also have a
buggy ${(z)...} so there's no immediate workaround that comes to mind.
Something involving writing it to a different history file and then
reading back with "fc -R" might work.

Re: I broke my !$

[Jay Levitt]

Picking this up... Yes, I modified zsh_add_history hook; see
thediscussion under "zshaddhistory confusion".  So what I have now
isthis:
function zshaddhistory() { print -sr -- "${1%%$'\n'}" fc -p
~/.zsh_history_detail print -sr -- "${1%%$'\n'} ### ${PWD} $(date
'+%Y-%m-%d %R')" return 1}
which seems to support the "you need print -S" theory.  I have
4.3.12,but it doesn't have -S; is that something only on trunk right
now?  Istrunk stable enough for average daily use?
I'm on zsh 4.3.12.
On Wed, Oct 5, 2011 at 12:13 PM, Bart Schaefer
<schaefer@brasslantern.com> wrote:
> On Oct 5,  5:48pm, Julien Nicoulaud wrote:
> }
> } Same for me, messing with zsh_add_history hook breaks history expansion:
>
> Aha.
>
> } history_strip_passwords() {
> }   # Strip out -Dgpg.passphrase option value (Maven)
> }   print -sr "${${1%%$'\n'}//(#b)(gpg.passphrase=)*[:space:]/$match[1]}"
> }   fc -p
> } }
> } add-zsh-hook zshaddhistory history_strip_passwords
> }
> } With this hook, history exapnsions like "!$" or "!!" always return the whole
> } history line...
>
> You need to either remove the double quotes or use "print -S".  With the
> quotes and the lower-case -s you are making a history entry that has
> exactly one word consisting of the entire command.
>
>    -s
>          Place the results in the history list instead of on the
>          standard output.  Each argument to the print command is
>          treated as a single word in the history, regardless of its
>          content.
>
>    -S
>          Place the results in the history list instead of on the
>          standard output.  In this case only a single argument is
>          allowed; it will be split into words as if it were a full
>          shell command line.  The effect is similar to reading the
>          line from a history file with the HIST_LEX_WORDS option
>          active.
>
> It's possible that you have a version of zsh that has the history hook
> but not the -S option of print.  In that event you probably also have a
> buggy ${(z)...} so there's no immediate workaround that comes to mind.
> Something involving writing it to a different history file and then
> reading back with "fc -R" might work.
>

Re: I broke my !$

[Bart Schaefer]

On Oct 5,  7:41am, Jay Levitt wrote:
}
} After playing with zsh_add_history, or possibly at some time before
} then, I broke !$...
} 
} % ls !$
} ls ls ~/.zsh_history

First check whether you broke history itself?  That is, if you recall
the command line with ctl-p or list it with the "history" command, is
the first word already doubled?  If so, it's probably something to do
with a zshaddhistory hook function.

Next check the value of $histchars -- I'm not sure how this would get
that specific result, but it's another way to break history. [*]

Nothing else comes to mind just now.  Selectively disabling parts of
your startup until you find a culprit as suggested by Daniel is the
most certain way to track it down.

[*] For example, if the first character of histchars is '$' then you
can't get the equivalent of !! any more, because in $$ the second $
is interpreted as a word designator "the last argument" instead of
as the event designator "the previous command".