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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local function softreq(...) local ok, lib = pcall(require, ...); if ok then return lib; else return nil, lib; end end
-- Required to be able to find packages installed with luarocks
if not softreq "luarocks.loader" then -- LuaRocks 2.x
softreq "luarocks.require"; -- LuaRocks <1.x
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("");
local longest_platform = 0;
for platform in pairs(sources) do
longest_platform = math.max(longest_platform, #platform);
end
for platform, source in pairs(sources) do
print("", platform..":"..(" "):rep(4+longest_platform-#platform)..source);
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 https://prosody.im/doc/depends");
print("**************************");
print("");
end
-- COMPAT w/pre-0.8 Debian: The Debian config file used to use
-- util.ztact, which has been removed from Prosody in 0.8. This
-- is to log an error for people who still use it, so they can
-- update their configs.
package.preload["util.ztact"] = function ()
if not package.loaded["core.loggingmanager"] then
error("util.ztact has been removed from Prosody and you need to fix your config "
.."file. More information can be found at https://prosody.im/doc/packagers#ztact", 0);
else
error("module 'util.ztact' has been deprecated in Prosody 0.8.");
end
end;
local function check_dependencies()
if _VERSION < "Lua 5.1" then
print "***********************************"
print("Unsupported Lua version: ".._VERSION);
print("At least Lua 5.1 is required.");
print "***********************************"
return false;
end
local fatal;
local lxp = softreq "lxp"
if not lxp then
missingdep("luaexpat", {
["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-expat0";
["luarocks"] = "luarocks install luaexpat";
["Source"] = "http://www.keplerproject.org/luaexpat/";
});
fatal = true;
end
local socket = softreq "socket"
if not socket then
missingdep("luasocket", {
["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-socket2";
["luarocks"] = "luarocks install luasocket";
["Source"] = "http://www.tecgraf.puc-rio.br/~diego/professional/luasocket/";
});
fatal = true;
end
local lfs, err = softreq "lfs"
if not lfs then
missingdep("luafilesystem", {
["luarocks"] = "luarocks install luafilesystem";
["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-filesystem0";
["Source"] = "http://www.keplerproject.org/luafilesystem/";
});
fatal = true;
end
local ssl = softreq "ssl"
if not ssl then
missingdep("LuaSec", {
["Debian/Ubuntu"] = "https://prosody.im/download/start#debian_and_ubuntu";
["luarocks"] = "luarocks install luasec";
["Source"] = "http://www.inf.puc-rio.br/~brunoos/luasec/";
}, "SSL/TLS support will not be available");
end
local encodings, err = softreq "util.encodings"
if not encodings then
if err:match("module '[^']*' 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("module '[^']*' 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
return not fatal;
end
local function log_warnings()
if _VERSION > "Lua 5.2" then
prosody.log("warn", "Support for %s is experimental, please report any issues", _VERSION);
end
local ssl = softreq"ssl";
if ssl then
local major, minor, veryminor, patched = ssl._VERSION:match("(%d+)%.(%d+)%.?(%d*)(M?)");
if not major or ((tonumber(major) == 0 and (tonumber(minor) or 0) <= 3 and (tonumber(veryminor) or 0) <= 2) and patched ~= "M") then
prosody.log("error", "This version of LuaSec contains a known bug that causes disconnects, see https://prosody.im/doc/depends");
end
end
local lxp = softreq"lxp";
if lxp then
if not pcall(lxp.new, { StartDoctypeDecl = false }) then
prosody.log("error", "The version of LuaExpat on your system leaves Prosody "
.."vulnerable to denial-of-service attacks. You should upgrade to "
.."LuaExpat 1.3.0 or higher as soon as possible. See "
.."https://prosody.im/doc/depends#luaexpat for more information.");
end
if not lxp.new({}).getcurrentbytecount then
prosody.log("error", "The version of LuaExpat on your system does not support "
.."stanza size limits, which may leave servers on untrusted "
.."networks (e.g. the internet) vulnerable to denial-of-service "
.."attacks. You should upgrade to LuaExpat 1.3.0 or higher as "
.."soon as possible. See "
.."https://prosody.im/doc/depends#luaexpat for more information.");
end
end
end
return {
softreq = softreq;
missingdep = missingdep;
check_dependencies = check_dependencies;
log_warnings = log_warnings;
};
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