File

util/argparse.lua @ 12828:f33887f925e1

net.server_epoll: Remove delay on last main loop iteration when quitting Main difference is that timers are not checked unconditionally before each poll, only when running out of previous poll results (hidden by util.poll). This removes a final poll at shutdown that usually delays the 'not quitting' condition check by one second.
author Kim Alvefur <zash@zash.se>
date Fri, 06 Jan 2023 04:38:39 +0100
parent 12477:cc84682b8429
child 13058:766152afc1c9
line wrap: on
line source

local function parse(arg, config)
	local short_params = config and config.short_params or {};
	local value_params = config and config.value_params or {};

	local parsed_opts = {};

	if #arg == 0 then
		return parsed_opts;
	end
	while true do
		local raw_param = arg[1];
		if not raw_param then
			break;
		end

		local prefix = raw_param:match("^%-%-?");
		if not prefix then
			break;
		elseif prefix == "--" and raw_param == "--" then
			table.remove(arg, 1);
			break;
		end
		local param = table.remove(arg, 1):sub(#prefix+1);
		if #param == 1 and short_params then
			param = short_params[param];
		end

		if not param then
			return nil, "param-not-found", raw_param;
		end

		local param_k, param_v;
		if value_params[param] then
			param_k, param_v = param, table.remove(arg, 1);
			if not param_v then
				return nil, "missing-value", raw_param;
			end
		else
			param_k, param_v = param:match("^([^=]+)=(.+)$");
			if not param_k then
				if param:match("^no%-") then
					param_k, param_v = param:sub(4), false;
				else
					param_k, param_v = param, true;
				end
			end
		end
		parsed_opts[param_k] = param_v;
	end
	for i = 1, #arg do
		parsed_opts[i] = arg[i];
	end
	return parsed_opts;
end

return {
	parse = parse;
}