/usr/share/zsh/functions/Zle/which-command is in zsh-common 5.0.7-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | zmodload -i zsh/parameter zsh/zutil
zle -I
local -a whencecmd wds
# Set the whence style to your favourite function
# (but NOT which-command!)
zstyle -a :zle:$WIDGET whence whencecmd || whencecmd=(whence -c --)
wds=(${(z)LBUFFER})
local wd barewd
local -A seen
while true; do
wd=${wds[1]}
barewd=${(Q)wd}
if [[ $barewd != $wd || -n $seen[$barewd] ]]; then
# quoted or already expanded, see if original word is an alias...
if [[ -z $seen[$barewd] && -n $aliases[$wd] ]]; then
# yes, so we need to decode that, with no extra expansion...
$whencecmd $wd
seen[$wd]=1
wds=(${(z)aliases[$wd]})
continue
else
# use unquoted word, don't expand alias
(unalias -- $barewd 2>/dev/null; $whencecmd $barewd)
fi
else
# turn on globsubst for =ls etc.
$whencecmd ${~barewd}
if [[ -n $aliases[$barewd] && -z $seen[$barewd] ]]; then
# Recursively expand aliases
seen[$barewd]=1
wds=(${(z)aliases[$barewd]})
continue
fi
fi
break
done
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