util/dependencies.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2010 Matthew Wild
   3 -- Copyright (C) 2008-2010 Waqas Hussain
   4 --
   5 -- This project is MIT/X11 licensed. Please see the
   6 -- COPYING file in the source package for more information.
   7 --
   8
   9 module("dependencies", package.seeall)
  10
  11 function softreq(...) local ok, lib =  pcall(require, ...); if ok then return lib; else return nil, lib; end end
  12
  13 -- Required to be able to find packages installed with luarocks
  14 if not softreq "luarocks.loader" then -- LuaRocks 2.x
  15         softreq "luarocks.require"; -- LuaRocks <1.x
  16 end
  17
  18 function missingdep(name, sources, msg)
  19         print("");
  20         print("**************************");
  21         print("Prosody was unable to find "..tostring(name));
  22         print("This package can be obtained in the following ways:");
  23         print("");
  24         local longest_platform = 0;
  25         for platform in pairs(sources) do
  26                 longest_platform = math.max(longest_platform, #platform);
  27         end
  28         for platform, source in pairs(sources) do
  29                 print("", platform..":"..(" "):rep(4+longest_platform-#platform)..source);
  30         end
  31         print("");
  32         print(msg or (name.." is required for Prosody to run, so we will now exit."));
  33         print("More help can be found on our website, at http://prosody.im/doc/depends");
  34         print("**************************");
  35         print("");
  36 end
  37
  38 function check_dependencies()
  39         local fatal;
  40
  41         local lxp = softreq "lxp"
  42
  43         if not lxp then
  44                 missingdep("luaexpat", {
  45                                 ["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-expat0";
  46                                 ["luarocks"] = "luarocks install luaexpat";
  47                                 ["Source"] = "http://www.keplerproject.org/luaexpat/";
  48                         });
  49                 fatal = true;
  50         end
  51
  52         local socket = softreq "socket"
  53
  54         if not socket then
  55                 missingdep("luasocket", {
  56                                 ["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-socket2";
  57                                 ["luarocks"] = "luarocks install luasocket";
  58                                 ["Source"] = "http://www.tecgraf.puc-rio.br/~diego/professional/luasocket/";
  59                         });
  60                 fatal = true;
  61         end
  62
  63         local lfs, err = softreq "lfs"
  64         if not lfs then
  65                 missingdep("luafilesystem", {
  66                                 ["luarocks"] = "luarocks install luafilesystem";
  67                                 ["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-filesystem0";
  68                                 ["Source"] = "http://www.keplerproject.org/luafilesystem/";
  69                         });
  70                 fatal = true;
  71         end
  72
  73         local ssl = softreq "ssl"
  74
  75         if not ssl then
  76                 missingdep("LuaSec", {
  77                                 ["Debian/Ubuntu"] = "http://prosody.im/download/start#debian_and_ubuntu";
  78                                 ["luarocks"] = "luarocks install luasec";
  79                                 ["Source"] = "http://www.inf.puc-rio.br/~brunoos/luasec/";
  80                         }, "SSL/TLS support will not be available");
  81         end
  82
  83         local encodings, err = softreq "util.encodings"
  84         if not encodings then
  85                 if err:match("not found") then
  86                         missingdep("util.encodings", { ["Windows"] = "Make sure you have encodings.dll from the Prosody distribution in util/";
  87                                                 ["GNU/Linux"] = "Run './configure' and 'make' in the Prosody source directory to build util/encodings.so";
  88                                         });
  89                 else
  90                         print "***********************************"
  91                         print("util/encodings couldn't be loaded. Check that you have a recent version of libidn");
  92                         print ""
  93                         print("The full error was:");
  94                         print(err)
  95                         print "***********************************"
  96                 end
  97                 fatal = true;
  98         end
  99
 100         local hashes, err = softreq "util.hashes"
 101         if not hashes then
 102                 if err:match("not found") then
 103                         missingdep("util.hashes", { ["Windows"] = "Make sure you have hashes.dll from the Prosody distribution in util/";
 104                                                 ["GNU/Linux"] = "Run './configure' and 'make' in the Prosody source directory to build util/hashes.so";
 105                                         });
 106                 else
 107                         print "***********************************"
 108                         print("util/hashes couldn't be loaded. Check that you have a recent version of OpenSSL (libcrypto in particular)");
 109                         print ""
 110                         print("The full error was:");
 111                         print(err)
 112                         print "***********************************"
 113                 end
 114                 fatal = true;
 115         end
 116         return not fatal;
 117 end
 118
 119 function log_warnings()
 120         if ssl then
 121                 local major, minor, veryminor, patched = ssl._VERSION:match("(%d+)%.(%d+)%.?(%d*)(M?)");
 122                 if not major or ((tonumber(major) == 0 and (tonumber(minor) or 0) <= 3 and (tonumber(veryminor) or 0) <= 2) and patched ~= "M") then
 123                         log("error", "This version of LuaSec contains a known bug that causes disconnects, see http://prosody.im/doc/depends");
 124                 end
 125         end
 126 end
 127
 128 return _M;