q.sh/q-calc

#!/bin/sh

ENV_bc=bc
ENV_wl_copy=wl-copy
ENV_cut=cut

calc() {
	res="$(echo "$1" | $ENV_bc 2>/dev/null)"
	if [ "$res" == "" ]; then
		res="-"
	fi
	echo "$res"
}

if [[ -z "$@" ]]; then
	echo "^= .*$"
elif [[ "$1" == "--hint" ]]; then
	shift
	echo "- = "
elif [[ "$1" == "--complete" ]]; then
	shift
	EXPR="$(echo "$@" | cut -d ' ' -f2-)"
	RES="$(calc "$EXPR")"
	echo "$RES = $EXPR -> $(calc "$EXPR")"
elif [[ "$1" == "--preview" ]]; then
	shift
	echo "$1"
elif [[ "$1" == "--run" ]]; then
	shift
	echo "$1"
	echo "$1" | (setsid -f $ENV_wl_copy)
elif [[ "$1" == "--cli" ]]; then
	shift
	calc "$(echo "$@" | $ENV_cut -d ' ' -f2-)"
else
	echo "Unexpected arguments: $@"
fi