insider.rb in engineyard-metadata-0.2.0

- old
+ new

@@ -1,15 +1,15 @@
 module EY
-  module Metadata
+  class Metadata
     # This gets pulled in when you're running directly on a cloud instance.
     module Insider
       DELEGATED_TO_AMAZON_EC2_API = %w{
         present_instance_id
         present_security_group
       }
     
-      DELEGATED_TO_CHEF_DNA = KEYS - DELEGATED_TO_AMAZON_EC2_API
+      DELEGATED_TO_CHEF_DNA = METHODS - DELEGATED_TO_AMAZON_EC2_API
 
       DELEGATED_TO_AMAZON_EC2_API.each do |name|
         define_method name do
           amazon_ec2_api.send name
         end
@@ -18,16 +18,11 @@
       DELEGATED_TO_CHEF_DNA.each do |name|
         define_method name do
           chef_dna.send name
         end
       end
-      
-      def clear
-        @chef_dna = nil
-        @amazon_ec2_api = nil
-      end
-      
+            
       # You can't get the list of environment names while you're on the instances themselves.
       def environment_names
         raise CannotGetFromHere
       end
       
@@ -37,9 +32,20 @@
       end
 
       # An adapter that reads from Amazon's EC2 API.
       def amazon_ec2_api
         @amazon_ec2_api ||= AmazonEc2Api.new
+      end
+      
+      def app_name
+        return @app_name if @app_name.is_a? String
+        if ENV['EY_APP_NAME']
+          @app_name = ENV['EY_APP_NAME']
+        elsif Dir.pwd =~ %r{/data/([^/]+)/current} or Dir.pwd =~ %r{/data/([^/]+)/releases}
+          @app_name = $1
+        end
+        raise RuntimeError, "[engineyard-metadata gem] Please set EY.metadata.app_name= or set ENV['EY_APP_NAME']" unless @app_name.to_s.strip.length > 0
+        @app_name
       end
     end
   end
 end