#! /bin/sh -

command -v squote_escape >/dev/null 2>&1 || { echo "${0} depends on squote_escape"; exit 1; }

if [ -t 0 ] && [ -n "${1}" ]; then
	query='find "${HOME}"/.better_bash_history/ -type f -exec cat {} \+'
	while [ -n "${1}" ]; do
		[ "${1}" = "-" ] && {
			invert_flag="-v"; shift;
			[ -n "${1}" ] || { echo "${0}: syntax error: expected pattern after minus"; exit 2; }
		} || invert_flag=""
		query="${query} | grep ${invert_flag} -aF -- $(squote_escape "${1}")"
		shift
	done

	eval "${query} | uniq | nl"
else
	echo "${0} is not a filter"
fi