Add support for btsync 2.x branch

pkgs/applications/networking/bittorrentsync/2.0.x.nix

@@ -0,0 +1,42 @@
+{ stdenv, fetchurl, patchelf }:
+
+let
+  arch = if stdenv.system == "x86_64-linux" then "x64"
+    else if stdenv.system == "i686-linux" then "i386"
+    else throw "Bittorrent Sync for: ${stdenv.system} not supported!";
+
+  sha256 = if stdenv.system == "x86_64-linux" then "cbce76f73f47c23d9073644504fa454976629450d008354bd8faef1bddf368fd"
+    else if stdenv.system == "i686-linux" then "d3e8583c8a54cbeb34ea3621daf0498316a959d944b30f24aa4e518a851ecdeb"
+    else throw "Bittorrent Sync for: ${stdenv.system} not supported!";
+
+  libPath = stdenv.lib.makeLibraryPath [ stdenv.cc.libc ];
+in
+stdenv.mkDerivation rec {
+  name = "btsync-${version}";
+  version = "2.0.93";
+
+  src  = fetchurl {
+    url  = "http://syncapp.bittorrent.com/${version}/btsync_${arch}-${version}.tar.gz";
+    inherit sha256;
+  };
+
+  dontStrip   = true; # Don't strip, otherwise patching the rpaths breaks
+  sourceRoot  = ".";
+  buildInputs = [ patchelf ];
+
+  installPhase = ''
+    mkdir -p "$out/bin/"
+    cp -r "btsync" "$out/bin/"
+
+    patchelf --interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
+      --set-rpath ${libPath} "$out/bin/btsync"
+  '';
+
+  meta = {
+    description = "Automatically sync files via secure, distributed technology";
+    homepage    = "http://www.bittorrent.com/sync";
+    license     = stdenv.lib.licenses.unfreeRedistributable;
+    platforms   = stdenv.lib.platforms.linux;
+    maintainers = with stdenv.lib.maintainers; [ iElectric thoughtpolice cwoac ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -11743,7 +11743,9 @@ let
 
   sxiv = callPackage ../applications/graphics/sxiv { };
 
-  bittorrentSync = callPackage ../applications/networking/bittorrentsync { };
+  bittorrentSync = bittorrentSync14;
+  bittorrentSync14 = callPackage ../applications/networking/bittorrentsync/1.4.x.nix { };
+  bittorrentSync20 = callPackage ../applications/networking/bittorrentsync/2.0.x.nix { };
 
   copy-com = callPackage ../applications/networking/copy-com { };