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Date: Tue, 8 Nov 2011 16:55:21 +0100
Message-ID: <CAHYJk3TH18sf1uQEGZyAgRbhN+BcMZu8x0gNvMJfnD6aEjESFA@mail.gmail.com>
Subject: Re: zsh spinning for ages when I hit tab on directory
From: Mikael Magnusson <mikachu@gmail.com>
To: zsh-users@zsh.org
Content-Type: text/plain; charset=UTF-8

On 8 November 2011 16:13, Bart Schaefer <schaefer@brasslantern.com> wrote:
> On Nov 8,  3:21pm, Markus Trippelsdorf wrote:
> } Subject: Re: zsh spinning for ages when I hit tab on directory
> }
> } > > When position the cursor after the man1/ of
> } > > ~ % /usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0/man/man1/
> } > > and hit tab, zsh starts spinning:
> }
> } zstyle ':completion:::::' completer _complete _approximate
> } zstyle -e ':completion:*:approximate:*' max-errors 'reply=( $(( ($#PREFIX+$#SUFFIX)/3 )) )'
> } zstyle ':completion:*:corrections' format '%B%d (errors: %e)%b'
> }
> } When I comment out the max-errors zstyle, zsh no longer hangs.
> }
> } So the next question is, how can I get the same behavior as before, but
> } without the long hangs?
>
> You're computing max-errors based on the length of the entire path, but
> the effect of correction is applied to each individual component, so
> you're allowing 18 corrections per filename in man1/ with the above.
>
> Try changing to something like
>
> zstyle -e ':completion:*:approximate:*' \
>        max-errors 'reply=( $(( ($#PREFIX:t+$#SUFFIX:h)/3 )) )'
>
> although that (and your original) allows no corrections unless there
> are at least 6 characters already in the current word, so you might
> want to use e.g. ($#PREFIX:t+2) or ($#PREFIX:t < 3 ? 3 : $#PREFIX:t).

You might also want to set this style:
zstyle ':completion:*' accept-exact-dirs 'yes'
Then zsh will not attempt to change segments that already match a dir
when a later doesn't exist.

-- 
Mikael Magnusson