util/dependencies.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2009 Matthew Wild
   3 -- Copyright (C) 2008-2009 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 function missingdep(name, sources, msg)
  14         print("");
  15         print("**************************");
  16         print("Prosody was unable to find "..tostring(name));
  17         print("This package can be obtained in the following ways:");
  18         print("");
  19         local longest_platform = 0;
  20         for platform in pairs(sources) do
  21                 longest_platform = math.max(longest_platform, #platform);
  22         end
  23         for platform, source in pairs(sources) do
  24                 print("", platform..":"..(" "):rep(4+longest_platform-#platform)..source);
  25         end
  26         print("");
  27         print(msg or (name.." is required for Prosody to run, so we will now exit."));
  28         print("More help can be found on our website, at http://prosody.im/doc/depends");
  29         print("**************************");
  30         print("");
  31 end
  32
  33 function check_dependencies()
  34         local fatal;
  35
  36         local lxp = softreq "lxp"
  37
  38         if not lxp then
  39                 missingdep("luaexpat", {
  40                                 ["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-expat0";
  41                                 ["luarocks"] = "luarocks install luaexpat";
  42                                 ["Source"] = "http://www.keplerproject.org/luaexpat/";
  43                         });
  44                 fatal = true;
  45         end
  46
  47         local socket = softreq "socket"
  48
  49         if not socket then
  50                 missingdep("luasocket", {
  51                                 ["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-socket2";
  52                                 ["luarocks"] = "luarocks install luasocket";
  53                                 ["Source"] = "http://www.tecgraf.puc-rio.br/~diego/professional/luasocket/";
  54                         });
  55                 fatal = true;
  56         end
  57
  58         local lfs, err = softreq "lfs"
  59         if not lfs then
  60                 missingdep("luafilesystem", {
  61                                 ["luarocks"] = "luarocks install luafilesystem";
  62                                 ["Debian/Ubuntu"] = "sudo apt-get install liblua5.1-filesystem0";
  63                                 ["Source"] = "http://www.keplerproject.org/luafilesystem/";
  64                         });
  65                 fatal = true;
  66         end
  67
  68         local ssl = softreq "ssl"
  69
  70         if not ssl then
  71                 if config.get("*", "core", "run_without_ssl") then
  72                         log("warn", "Running without SSL support because run_without_ssl is defined in the config");
  73                 else
  74                         missingdep("LuaSec", {
  75                                         ["Debian/Ubuntu"] = "http://prosody.im/download/start#debian_and_ubuntu";
  76                                         ["luarocks"] = "luarocks install luasec";
  77                                         ["Source"] = "http://www.inf.puc-rio.br/~brunoos/luasec/";
  78                                 }, "SSL/TLS support will not be available");
  79                 end
  80         else
  81                 local major, minor, veryminor, patched = ssl._VERSION:match("(%d+)%.(%d+)%.?(%d*)(M?)");
  82                 if not major or ((tonumber(major) == 0 and (tonumber(minor) or 0) <= 3 and (tonumber(veryminor) or 0) <= 2) and patched ~= "M") then
  83                         log("error", "This version of LuaSec contains a known bug that causes disconnects, see http://prosody.im/doc/depends");
  84                 end
  85         end
  86
  87         local encodings, err = softreq "util.encodings"
  88         if not encodings then
  89                 if err:match("not found") then
  90                         missingdep("util.encodings", { ["Windows"] = "Make sure you have encodings.dll from the Prosody distribution in util/";
  91                                                 ["GNU/Linux"] = "Run './configure' and 'make' in the Prosody source directory to build util/encodings.so";
  92                                         });
  93                 else
  94                         print "***********************************"
  95                         print("util/encodings couldn't be loaded. Check that you have a recent version of libidn");
  96                         print ""
  97                         print("The full error was:");
  98                         print(err)
  99                         print "***********************************"
 100                 end
 101                 fatal = true;
 102         end
 103
 104         local hashes, err = softreq "util.hashes"
 105         if not hashes then
 106                 if err:match("not found") then
 107                         missingdep("util.hashes", { ["Windows"] = "Make sure you have hashes.dll from the Prosody distribution in util/";
 108                                                 ["GNU/Linux"] = "Run './configure' and 'make' in the Prosody source directory to build util/hashes.so";
 109                                         });
 110                 else
 111                         print "***********************************"
 112                         print("util/hashes couldn't be loaded. Check that you have a recent version of OpenSSL (libcrypto in particular)");
 113                         print ""
 114                         print("The full error was:");
 115                         print(err)
 116                         print "***********************************"
 117                 end
 118                 fatal = true;
 119         end
 120         return not fatal;
 121 end
 122
 123
 124 return _M;