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#!/bin/sh

menu="wmenu"
cache_dir="${XDG_CACHE_HOME:-"$HOME/.cache"}"
cache="$cache_dir/wmenu_run"

uptodate()
{
	IFS=:
	for path  in $PATH
	do
		test "$path" -nt "$cache" &&
			return 1
	done

	return 0
}

get_bin()
{
	IFS=:
	for path in $PATH
	do
		for bin in "$path"/*
		do
			[ -x "$bin" ] &&
				echo "${bin##*/}"
		done
	done
}

main()
{
	[ -d "$cache_dir" ] ||
		mkdir -p "$cache_dir"
	[ -z "$WAYLAND_DISPLAY" ] &&
		menu="dmenu"

	if [ -f "$cache" ] && uptodate
	then
		"$menu" "$@" < "$cache" | ${SHELL:-"/bin/sh"} &
	else
		get_bin | sort -u | tee "$cache" | "$menu" "$@" | ${SHELL:-"/bin/sh"} &
	fi
}

main "$@"