prosody: add dependency on zlib (close #6894)

@vcunat moved the defaults inside the prosody expression.

pkgs/servers/xmpp/prosody/default.nix

···
-{ stdenv, fetchurl, lua5, luasocket, luasec, luaexpat, luafilesystem, luabitop, luaevent ? null, libidn, openssl, makeWrapper, fetchhg, withLibevent ? false }:
+{ stdenv, fetchurl, libidn, openssl, makeWrapper, fetchhg
+, lua5, luasocket, luasec, luaexpat, luafilesystem, luabitop, luaevent ? null, luazlib ? null
+, withLibevent ? true, withZlib ? true }:
 
 assert withLibevent -> luaevent != null;
+assert withZlib -> luazlib != null;
 
 with stdenv.lib;
 
 let
-  libs        = [ luasocket luasec luaexpat luafilesystem luabitop ] ++ optional withLibevent luaevent;
+  libs        = [ luasocket luasec luaexpat luafilesystem luabitop ]
+                ++ optional withLibevent luaevent
+                ++ optional withZlib luazlib;
   getPath     = lib : type : "${lib}/lib/lua/${lua5.luaversion}/?.${type};${lib}/share/lua/${lua5.luaversion}/?.${type}";
   getLuaPath  = lib : getPath lib "lua";
   getLuaCPath = lib : getPath lib "so";
···
   };
 
   buildInputs = [ lua5 luasocket luasec luaexpat luabitop libidn openssl makeWrapper ]
-                ++ optional withLibevent luaevent;
+                ++ optional withLibevent luaevent
+                ++ optional withZlib luazlib;
 
   configureFlags = [
     "--ostype=linux"

pkgs/top-level/all-packages.nix

···
 
   prosody = callPackage ../servers/xmpp/prosody {
     lua5 = lua5_1;
-    inherit (lua51Packages) luasocket luasec luaexpat luafilesystem luabitop luaevent;
-    withLibevent = true;
+    inherit (lua51Packages) luasocket luasec luaexpat luafilesystem luabitop luaevent luazlib;
   };
 
   elasticmq = callPackage ../servers/elasticmq { };

pkgs/top-level/lua-packages.nix

···
 
 { fetchurl, stdenv, lua, callPackage, unzip, zziplib, pkgconfig, libtool
 , pcre, oniguruma, gnulib, tre, glibc, sqlite, openssl, expat, cairo
-, perl, gtk, python, glib, gobjectIntrospection, libevent
+, perl, gtk, python, glib, gobjectIntrospection, libevent, zlib
 }:
 
 let
···
       license = stdenv.lib.licenses.mit;
     };
   };
+
+  luazlib = buildLuaPackage rec {
+    name = "zlib-${version}";
+    version = "0.4";
+
+    src = fetchurl {
+      url = "https://github.com/brimworks/lua-zlib/archive/v${version}.tar.gz";
+      sha256 = "1l32nwyh8b4vicxvlhbv9qhkhklbhvjfn8wd72bjk7ac9kz172rd";
+    };
+
+    buildInputs = [ zlib ];
+
+    preBuild = ''
+      makeFlagsArray=(
+        linux
+        LUAPATH="$out/share/lua/${lua.luaversion}"
+        LUACPATH="$out/lib/lua/${lua.luaversion}"
+        INCDIR="-I${lua}/include"
+        LIBDIR="-L$out/lib");
+    '';
+
+    preInstall = "mkdir -p $out/lib/lua/${lua.luaversion}";
+
+    meta = with stdenv.lib; {
+      homepage = https://github.com/brimworks/lua-zlib;
+      hydraPlatforms = platforms.linux;
+      license = licenses.mit;
+      maintainers = [ maintainers.koral ];
+    };
+  };
+      
 
   luastdlib = buildLuaPackage {
     name = "stdlib";