-- Prosody IM

-- Copyright (C) 2008-2009 Matthew Wild

-- Copyright (C) 2008-2009 Waqas Hussain

-- 

-- This project is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

local fatal;

local function softreq(...) local ok, lib =  pcall(require, ...); if ok then return lib; else return nil, lib; end end

local function missingdep(name, sources, msg)

	print("");

	print("**************************");

	print("Prosody was unable to find "..tostring(name));

	print("This package can be obtained in the following ways:");

	print("");

	for k,v in pairs(sources) do

		print("", k, v);

	end

	print("");

	print(msg or (name.." is required for Prosody to run, so we will now exit."));

	print("More help can be found on our website, at http://prosody.im/doc/depends");

	print("**************************");

	print("");

end

local lxp = softreq "lxp"

if not lxp then

	missingdep("luaexpat", { ["Ubuntu 8.04 (Hardy)"] = "sudo apt-get install liblua5.1-expat0"; ["luarocks"] = "luarocks install luaexpat"; });

	fatal = true;

end

local socket = softreq "socket"

if not socket then

	missingdep("luasocket", { ["Ubuntu 8.04 (Hardy)"] = "sudo apt-get install liblua5.1-socket2"; ["luarocks"] = "luarocks install luasocket"; });

	fatal = true;

end

local ssl = softreq "ssl"

if not ssl then

	if config.get("*", "core", "run_without_ssl") then

		log("warn", "Running without SSL support because run_without_ssl is defined in the config");

	else

		missingdep("LuaSec", { ["Source"] = "http://www.inf.puc-rio.br/~brunoos/luasec/" }, "SSL/TLS support will not be available");

	end

end

local encodings, err = softreq "util.encodings"

if not encodings then

	if err:match("not found") then

		missingdep("util.encodings", { ["Windows"] = "Make sure you have encodings.dll from the Prosody distribution in util/";

	 				["GNU/Linux"] = "Run './configure' and 'make' in the Prosody source directory to build util/encodings.so";

	 			});

	else

		print "***********************************"

		print("util/encodings couldn't be loaded. Check that you have a recent version of libidn");

		print ""

		print("The full error was:");

		print(err)

		print "***********************************"

	end

	fatal = true;

end

local hashes, err = softreq "util.hashes"

if not hashes then

	if err:match("not found") then

		missingdep("util.hashes", { ["Windows"] = "Make sure you have hashes.dll from the Prosody distribution in util/";

	 				["GNU/Linux"] = "Run './configure' and 'make' in the Prosody source directory to build util/hashes.so";

	 			});

 	else

		print "***********************************"

		print("util/hashes couldn't be loaded. Check that you have a recent version of OpenSSL (libcrypto in particular)");

		print ""

		print("The full error was:");

		print(err)

		print "***********************************"

	end

	fatal = true;

end

if fatal then os.exit(1); end