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# This function lists options with the no's in front removed for
# improved comprehension, i.e. `norcs off' becomes `rcs on'.
# The format is otherwise like that with `kshoptionprint' set,
# i.e. you can see all options whether on or off.
# It can take a list of option names or parts thereof to search for
# via egrep.
#
# Written by Sweth Chandramouli with hacks by Bart Schaefer.
listalloptions () {
emulate -R zsh
builtin setopt localoptions kshoptionprint
local OPT_NAME OPT_PAIR OPT_VALUE
for OPT_PAIR in "${(f)$(builtin setopt)}" ; do
OPT_VALUE=${OPT_PAIR##* }
OPT_NAME=${OPT_PAIR%% *}
if [[ ${OPT_NAME#no} != ${OPT_NAME} ]] ; then
OPT_VALUE=${(L)${${OPT_VALUE:s/on/OFF}:s/off/on}} &&
OPT_NAME=${OPT_NAME#no};
fi;
echo ${(r:21:)OPT_NAME} ${OPT_VALUE}
done
}
if [[ -n $@ ]]; then
listalloptions | egrep "${(j.|.)@}"
else
listalloptions
fi
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