Add npm2nix

pkgs/development/tools/node/npm2nix/default.nix

@@ -0,0 +1,26 @@
+{ stdenv, fetchurl, coffeescript }:
+
+let version = "0.1"; in
+
+stdenv.mkDerivation rec {
+  name = "npm2nix-${version}";
+
+  src = fetchurl {
+    url = "https://bitbucket.org/shlevy/npm2nix/get/${version}.tar.bz2";
+    sha256 = "14rfs114k02yc9gx0bcjqy67f9cqgkrr1dccwlzl09q9b6qs1k3k";
+  };
+
+  phases = [ "unpackPhase" "installPhase" ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    sed 's|#!/usr/bin/env coffee|#!${coffeescript}/bin/coffee|' npm2nix.coffee \
+      > $out/bin/npm2nix
+    chmod +x $out/bin/npm2nix
+  '';
+
+  meta = {
+    description = "A tool to generate nix expressions from npm packages";
+    maintainer = stdenv.lib.maintainers.shlevy;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -977,6 +977,10 @@ let
     inherit pkgs stdenv nodejs fetchurl;
   });
 
+  npm2nix = callPackage ../development/tools/node/npm2nix {
+    coffeescript = nodePackages."coffee-script";
+  };
+
   ldns = callPackage ../development/libraries/ldns { };
 
   lftp = callPackage ../tools/networking/lftp { };