Support scope assignment through ENV

Author: methodmissing

lib/scrooge/profile.rb

@@ -158,7 +158,7 @@ def raise_on_missing_attribute?
       def configure! #:nodoc:
         @orm = configure_with( @options['orm'], [:active_record], :active_record )
         @storage = configure_with( @options['storage'], [:memory], :memory )
-        @scope = configure_with( @options['scope'].to_s, framework.scopes, nil )
+        @scope = configure_with( @options['scope'].to_s, framework.scopes, ENV['scope'] )
         @enabled = configure_with( @options['enabled'], [true, false], false )
         @on_missing_attribute = configure_with( @options['on_missing_attribute'], [:reload, :raise], :reload )
         reset_backends!

spec/units/scrooge/profile_spec.rb

@@ -63,4 +63,11 @@
     @profile.raise_on_missing_attribute?().should equal( false )  
   end  
 
+  it "should be able to fallback to scope from the environment if none given" do
+    @profile.framework.stub!(:scopes).and_return( [] )
+    ENV['scope'] = 'scope_from_env'
+    @profile.send(:configure!)
+    @profile.scope_to.should eql( 'scope_from_env' )   
+  end  
+    
 end