From 8bd81bc3d6191b8176f95dd68e9013bc8e02704a Mon Sep 17 00:00:00 2001
From: aszlig <aszlig@redmoonstudios.org>
Date: Fri, 20 Jul 2012 01:49:47 +0200
Subject: [PATCH] netrw: Allow to specify checksum hash library.

Within netrw the only checksum algorithm that is available is MD5. We thus make
it possible for users to override this, so algorithms from other libraries such
as OpenSSL and MHash can used.
---
 pkgs/tools/networking/netrw/default.nix | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/pkgs/tools/networking/netrw/default.nix b/pkgs/tools/networking/netrw/default.nix
index c9054639359..eb03377fc52 100644
--- a/pkgs/tools/networking/netrw/default.nix
+++ b/pkgs/tools/networking/netrw/default.nix
@@ -1,9 +1,23 @@
-{ stdenv, fetchurl }:
+{ stdenv, fetchurl
+, checksumType ? "built-in"
+, libmhash ? null
+, openssl ? null
+}:
+
+assert checksumType == "mhash" -> libmhash != null;
+assert checksumType == "openssl" -> openssl != null;
 
 stdenv.mkDerivation rec {
   name = "netrw-${version}";
   version = "1.3.2";
 
+  configureFlags = [
+    "--with-checksum=${checksumType}"
+  ];
+
+  buildInputs = stdenv.lib.optional (checksumType == "mhash") libmhash
+             ++ stdenv.lib.optional (checksumType == "openssl") openssl;
+
   src = fetchurl {
     urls = [
       "http://mamuti.net/files/netrw/netrw-${version}.tar.bz2"