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'main': Don't highlight aliases in "fake" command word positions, such as 'sudo ls'.

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This commit is contained in:
Daniel Shahaf 2018-10-10 10:07:57 +00:00
commit 00d9b7a6b2
2 changed files with 79 additions and 2 deletions
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39
highlighters/main/main-highlighter.zsh
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@ -127,20 +127,43 @@ _zsh_highlight_main_calculate_fallback() {
#
# Takes a single argument.
#
# Uses the following caller variables: [[ $this_word == *':alias:'* ]]
#
# The result will be stored in REPLY.
_zsh_highlight_main__type() {
# Our caller knows whether aliases are allowed at this point. Compare:
# % ls
# % sudo ls
if [[ $this_word == *':alias:'* ]]; then
integer -r aliases_allowed=1
else
integer -r aliases_allowed=0
fi
# For the same reason, we won't cache replies of anything that exists as an
# alias at all, regardless of $aliases_allowed.
#
# ### We probably _should_ cache them in a cache that's keyed on the value of
# ### $aliases_allowed, on the assumption that aliases are the common case.
integer may_cache=1
# Cache lookup
if (( $+_zsh_highlight_main__command_type_cache )); then
REPLY=$_zsh_highlight_main__command_type_cache[(e)$1]
if [[ -n "$REPLY" ]]; then
return
fi
fi
# Main logic
if (( $#options_to_set )); then
setopt localoptions $options_to_set;
fi
unset REPLY
if zmodload -e zsh/parameter; then
if (( $+aliases[(e)$1] )); then
may_cache=0
fi
if (( $+aliases[(e)$1] )) && (( aliases_allowed )); then
REPLY=alias
elif (( $+saliases[(e)${1##*.}] )); then
REPLY='suffix alias'
@ -165,9 +188,21 @@ _zsh_highlight_main__type() {
fi
if ! (( $+REPLY )); then
# Note that 'type -w' will run 'rehash' implicitly.
REPLY="${$(LC_ALL=C builtin type -w -- $1 2>/dev/null)##*: }"
#
# We 'unalias' in a subshell, so the parent shell is not affected.
#
# The colon command is there just to avoid a command substitution that
# starts with an arithmetic expression [«((…))» as the first thing inside
# «$(…)»], which is area that has had some parsing bugs before 5.6
# (approximately).
REPLY="${$(:; (( aliases_allowed )) || unalias -- $1;LC_ALL=C builtin type -w -- $1 2>/dev/null)##*: }"
if [[ $REPLY == 'alias' ]]; then
may_cache=0
fi
fi
if (( $+_zsh_highlight_main__command_type_cache )); then
# Cache population
if (( may_cache )) && (( $+_zsh_highlight_main__command_type_cache )); then
_zsh_highlight_main__command_type_cache[(e)$1]=$REPLY
fi
}