add bittorrent sync

pkgs/applications/networking/bittorrentsync/default.nix

@@ -0,0 +1,49 @@
+{ stdenv, fetchurl, patchelf }:
+
+# this package contains the daemon version of bittorrent sync
+
+# it's unfortunately closed source.
+
+let
+  # TODO: arm, ppc, osx
+
+  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!";
+    
+  interpreter = if stdenv.system == "x86_64-linux" then "ld-linux-x86-64.so.2"
+    else if stdenv.system == "i686-linux" then "ld-linux.so.2"
+    else throw "Bittorrent Sync for: ${stdenv.system} not supported!";
+
+  version = "1.0.116";
+  sha256 = if stdenv.system == "x86_64-linux" then "108c11x8lp0a4irq88raclz3zfvmkxsqymxx3y8amc1lc6kc3n8i"
+    else if stdenv.system == "i686-linux" then "0kkxi04rggq6lrvn7g1xjay2nskqn7z4qkm0h0lcra7h2jz09mf1"
+    else throw "Bittorrent Sync for: ${stdenv.system} not supported!";
+
+in stdenv.mkDerivation {
+  name = "btsync-bin-${version}";
+  src = fetchurl {
+    # TODO: using version-specific URL: http://forum.bittorrent.com/topic/18070-versioned-binary-downloads/#entry45868
+    url = "http://btsync.s3-website-us-east-1.amazonaws.com/btsync_${arch}.tar.gz";
+    inherit sha256;
+  };
+
+  sourceRoot = ".";
+
+  installPhase = ''
+    ensureDir "$out/bin/"
+    cp -r "btsync" "$out/bin/"
+
+    patchelf --set-interpreter ${stdenv.glibc}/lib/${interpreter} \
+      "$out/bin/btsync"
+  '';
+
+  buildInputs = [ patchelf ];
+
+  meta = {
+    homepage = "http://labs.bittorrent.com/experiments/sync.html";
+    description = "Automatically sync files via secure, distributed technology.";
+    license = stdenv.lib.licenses.unfreeRedistributable;
+    maintainers = [ stdenv.lib.maintainers.iElectric ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -7815,6 +7815,8 @@ let
 
   st = callPackage ../applications/misc/st { };
 
+  bittorrentSync = callPackage ../applications/networking/bittorrentsync { };
+
   dropbox = callPackage ../applications/networking/dropbox { };
 
   dropbox-cli = callPackage ../applications/networking/dropbox-cli { };