From bc780285c034a94f5c9ec84d1ebc23bba07f5dd9 Mon Sep 17 00:00:00 2001
From: Pooyan Khosravi <pekhee@gmail.com>
Date: Fri, 12 May 2017 08:52:18 -0400
Subject: [PATCH] ruby-modules gem-config: add rainbow

Rainbow needs rake (a make analogue) as build dep. This builds an specific
version of rake for building rainbow.

Since rake is private to rainbow there shouldn't be any problems until rainbow
devs decide they need another rake version which is unlikely.
---
 .../ruby-modules/gem-config/default.nix           | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index 83346037dad..d8f3a18d5f8 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -21,11 +21,20 @@
 , libiconv, postgresql, v8_3_16_14, clang, sqlite, zlib, imagemagick
 , pkgconfig , ncurses, xapian_1_2_22, gpgme, utillinux, fetchpatch, tzdata, icu, libffi
 , cmake, libssh2, openssl, mysql, darwin, git, perl, gecode_3, curl
-, libmsgpack, qt48, libsodium, snappy, libossp_uuid, lxc
+, libmsgpack, qt48, libsodium, snappy, libossp_uuid, lxc, buildRubyGem
 }@args:
 
 let
   v8 = v8_3_16_14;
+
+  rainbow_rake = buildRubyGem {
+    name = "rake";
+    gemName = "rake";
+    remotes = ["https://rubygems.org"];
+    sha256 = "01j8fc9bqjnrsxbppncai05h43315vmz9fwg28qdsgcjw9ck1d7n";
+    type = "gem";
+    version = "12.0.0";
+  };
 in
 
 {
@@ -145,6 +154,10 @@ in
     buildInputs = [ openssl ];
   };
 
+  rainbow = attrs: {
+    buildInputs = [ rainbow_rake ];
+  };
+
   rbnacl = spec: {
     postInstall = ''
     sed -i $(cat $out/nix-support/gem-meta/install-path)/lib/rbnacl.rb -e "2a \