Add optional configuration for rake version

* applies to deploy:setup and normal deploy

lib/moonshine/capistrano_integration.rb

@@ -438,7 +438,8 @@ def self.load_into(capistrano_config)
           end
 
           task :install_moonshine_deps do
-            sudo 'gem install rake --no-rdoc --no-ri'
+            rake_version = fetch(:rake_version, '>= 0')
+            sudo "gem install rake --no-rdoc --no-ri --version='#{rake_version}'"
             sudo 'gem install i18n --no-rdoc --no-ri' # workaround for missing activesupport-3.0.2 dep on i18n
             sudo 'gem install shadow_puppet --no-rdoc --no-ri'
             if rails_root.join('Gemfile').exist?

lib/moonshine/manifest/rails/rails.rb

@@ -59,7 +59,8 @@ def rails_logrotate
   # This task ensures Rake is installed and that <tt>rake environment</tt>
   # executes without error in your <tt>rails_root</tt>.
   def rails_rake_environment
-    package 'rake', :provider => :gem, :ensure => :installed
+    rake_version = configuration[:rake_version] || :installed
+    package 'rake', :provider => :gem, :ensure => rake_version
     file '/var/log/moonshine_rake.log',
       :ensure   => :present,
       :owner    => configuration[:user],

spec/moonshine/manifest/rails_spec.rb

@@ -534,4 +534,18 @@ def search(gem_pattern, platform_only = false)
     end
   end
 
+  describe "rake" do
+    it "installs :installed by default" do
+      @manifest.configure(:rake_version => nil)
+      @manifest.rails_rake_environment
+      @manifest.should have_package('rake').version(:installed)
+    end
+
+    it "can be pinned to a specific version" do
+      @manifest.configure(:rake_version => '1.2.3')
+      @manifest.rails_rake_environment
+      @manifest.should have_package('rake').version('1.2.3')
+    end
+  end
+
 end