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completion: Cap max-errors at 7 to avoid hanging (#953)

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7 is pretty arbitrarily chosen, but seems like a reasonable tradeoff, at
least the completion no longer shows symptoms of exponential
time-growth when trying to complete something completely wrong.

This fixes #946.
This commit is contained in:
Anton Löfgren 2017-04-13 11:47:51 +02:00 committed by Kaleb Elwert
parent 1c0f95c08e
commit 5c0e68f75f
1 changed files with 3 additions and 2 deletions
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5
modules/completion/init.zsh
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@ -66,8 +66,9 @@ zstyle ':completion:*' completer _complete _match _approximate
zstyle ':completion:*:match:*' original only
zstyle ':completion:*:approximate:*' max-errors 1 numeric
# Increase the number of errors based on the length of the typed word.
zstyle -e ':completion:*:approximate:*' max-errors 'reply=($((($#PREFIX+$#SUFFIX)/3))numeric)'
# Increase the number of errors based on the length of the typed word. But make
# sure to cap (at 7) the max-errors to avoid hanging.
zstyle -e ':completion:*:approximate:*' max-errors 'reply=($((($#PREFIX+$#SUFFIX)/3>7?7:($#PREFIX+$#SUFFIX)/3))numeric)'
# Don't complete unavailable commands.
zstyle ':completion:*:functions' ignored-patterns '(_*|pre(cmd|exec))'