RabbitMQ formula

RabbitMQ is a complete and highly reliable Enterprise Messaging system based
on the emerging AMQP standard.

Signed-off-by: Max Howell <max@methylblue.com>

I left this one for ages as I wasn't sure about the erlang_libdir bit. I changed it in the end. But maybe it doesn't work. Someone will have to verify.

If erlang needs to look in a certain dir for plugins, we need to make sure it looks in the HOMEBREW_PREFIX dir and not further up, ie. its prefix in the Cellar. Same for any plugin system.

Formula/rabbitmq.rb

@@ -0,0 +1,21 @@
+require 'brewkit'
+
+class Rabbitmq <Formula
+  @homepage='http://rabbitmq.com'
+  @url='http://www.rabbitmq.com/releases/rabbitmq-server/v1.6.0/rabbitmq-server-1.6.0.tar.gz'
+  @md5='af3b0d868d58e5aefb4f0837b82ca010'
+
+  depends_on 'erlang'
+
+  def erlang_libdir
+    prefix + "lib" + "erlang" + "lib"
+  end
+
+  def install
+    system "make"
+    system "TARGET_DIR=#{erlang_libdir}/rabbitmq-#{version} \
+                MAN_DIR=#{man} \
+                SBIN_DIR=#{sbin} \
+                make install"
+  end
+end