added Rakefile

Author: frsyuki

.gitignore

@@ -0,0 +1,7 @@
+Gemfile*
+.bundle
+.rbenv-version
+.DS_Store
+*~
+/msgpack-ruby
+/vendor

Gemfile

@@ -0,0 +1,7 @@
+source :rubygems
+
+gem 'rake', '~> 0.9.2'
+gem 'rake-compiler', '~> 0.8.1'
+gem 'rspec', '~> 2.11'
+gem 'yard', '~> 0.8.2'
+

Rakefile

@@ -0,0 +1,23 @@
+require 'fileutils'
+
+task :update do
+  if File.directory?("msgpack-ruby")
+    Dir.glob("msgpack-ruby/*", &FileUtils.method(:rm_rf))
+    Dir.chdir("msgpack-ruby") do
+      sh "git checkout ."
+    end
+  else
+    sh "git clone git://github.com/msgpack/msgpack-ruby.git"
+  end
+
+  Dir.chdir("msgpack-ruby") do
+    sh "git checkout master"
+    sh "git pull"
+    sh "rake doc"
+  end
+
+  FileUtils.cp_r Dir.glob("msgpack-ruby/doc/*"), '.'
+end
+
+task :default => :update
+