go2nix: extracted from goPackages

pkgs/development/tools/go2nix/default.nix

@@ -0,0 +1,32 @@
+# This file was generated by go2nix.
+{ stdenv, lib, goPackages, go-bindata, goimports, nix-prefetch-git, git, makeWrapper,
+  fetchgit, fetchhg, fetchbzr, fetchsvn }:
+
+with goPackages;
+
+buildGoPackage rec {
+  name = "go2nix-${version}";
+  version = "20160307-${stdenv.lib.strings.substring 0 7 rev}";
+  rev = "4c552dadd855e3694ed3499feb46dca9cd855f60";
+
+  goPackagePath = "github.com/kamilchm/go2nix";
+
+  src = fetchgit {
+    inherit rev;
+    url = "https://github.com/kamilchm/go2nix";
+    sha256 = "1pwnm1vrjxvgl17pk9n1k5chmhgwxkrwp2s1bzi64xf12anibj63";
+  };
+
+  goDeps = ./deps.json;
+
+  buildInputs = [ go-bindata goimports makeWrapper ];
+  preBuild = ''go generate ./...'';
+
+  postInstall = ''
+    wrapProgram $bin/bin/go2nix \
+      --prefix PATH : ${nix-prefetch-git}/bin \
+      --prefix PATH : ${git}/bin
+  '';
+
+  allowGoReference = true;
+}

pkgs/development/tools/go2nix/deps.json

@@ -0,0 +1,11 @@
+[
+  {
+    "include": "../../libs.json",
+    "packages": [
+      "github.com/alecthomas/template",
+      "github.com/alecthomas/units",
+      "gopkg.in/alecthomas/kingpin.v2",
+      "github.com/Masterminds/vcs"
+    ]
+  }
+]