Add a gemspec and support loading ffi as a gem

Rakefile

@@ -1,6 +1,12 @@
+require 'rake/testtask'
+
 ROOT = File.dirname(__FILE__)
 
-task :test do
-  $:.unshift File.join(ROOT, "lib")
-  $:.unshift File.join(ROOT, "test")
+Rake::TestTask.new do |t|
+  t.verbose = true
+  t.test_files = FileList["test/**/t_*.rb"]
+end
+
+task :gem do
+  sh "gem build netlinkrb.gemspec"
 end

lib/linux/iptables.rb

@@ -1,6 +1,12 @@
 require 'socket'
 require 'linux/constants'
-require 'ffi'
+
+begin
+  require 'ffi'
+rescue LoadError
+  require('rubygems') ? retry : raise
+end
+
 
 # Good things about FFI::Struct:
 # - robust pre-existing code

lib/linux/sendmsg.rb

@@ -1,8 +1,13 @@
 # Patchup to add Socket#sendmsg and Socket#recvmsg for ruby 1.8
 
 if BasicSocket.instance_methods.grep(/^sendmsg$/).empty?
-  require 'ffi'
+  begin
+    require 'ffi'
+  rescue LoadError
+    require('rubygems') ? retry : raise
+  end
 
+    
   class BasicSocket
     module FFIExt
       extend FFI::Library

netlinkrb.gemspec

@@ -0,0 +1,17 @@
+# encoding: utf-8
+
+lib = File.expand_path("../lib", __FILE__)
+$:.unshift lib unless $:.include? lib
+
+Gem::Specification.new do |s|
+  s.name = "netlinkrb"
+  s.version = "0.10"
+  s.platform = Gem::Platform::RUBY
+  s.authors = ["Brian Candler", "Patrick Cherry", "Alex Young"]
+  s.email = ["matthew@bytemark.co.uk"]
+  s.summary = "Interface to Linux' Netlink API"
+  s.description = "Ruby native interface to the Netlink API which avoids shelling out to command-line tools as much as possible."
+  s.files = Dir["{lib,examples}/**/*"] + %w{README}
+  s.require_path = "lib"
+  s.add_dependency "ffi"
+end