From 6d3183e7daa07d730d644803b842c0696e02f01e Mon Sep 17 00:00:00 2001
From: c0bw3b <c0bw3b@users.noreply.github.com>
Date: Tue, 13 Dec 2016 00:45:05 +0100
Subject: [PATCH] nghttp2: refactor (close #21029)

Turning the dependencies unrelated to the base libnghttp2 into proper
options.  vcunat modified the commit slightly.
---
 pkgs/development/libraries/nghttp2/default.nix | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/nghttp2/default.nix b/pkgs/development/libraries/nghttp2/default.nix
index f7a026c52d46..0697b05c0a5d 100644
--- a/pkgs/development/libraries/nghttp2/default.nix
+++ b/pkgs/development/libraries/nghttp2/default.nix
@@ -2,9 +2,19 @@
 
 # Optional Dependencies
 , openssl ? null, libev ? null, zlib ? null
-#, jansson ? null, boost ? null, libxml2 ? null, jemalloc ? null
+, enableHpack ? false, jansson ? null
+, enableAsioLib ? false, boost ? null
+, enableGetAssets ? false, libxml2 ? null
+, enableJemalloc ? false, jemalloc ? null
 }:
 
+assert enableHpack -> jansson != null;
+assert enableAsioLib -> boost != null;
+assert enableGetAssets -> libxml2 != null;
+assert enableJemalloc -> jemalloc != null;
+
+with { inherit (stdenv.lib) optional; };
+
 stdenv.mkDerivation rec {
   name = "nghttp2-${version}";
   version = "1.17.0";
@@ -18,7 +28,11 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "dev" "lib" ];
 
   nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ openssl libev zlib ];
+  buildInputs = [ openssl libev zlib ]
+    ++ optional enableHpack jansson
+    ++ optional enableAsioLib boost
+    ++ optional enableGetAssets libxml2
+    ++ optional enableJemalloc jemalloc;
 
   enableParallelBuilding = true;