refactor the most complex thing in the app, in preparation of more cleaning

features/ruby_gemfile.feature

@@ -263,6 +263,7 @@ Feature: Gemfiles
       gem "two", {:require=>nil}
       """
 
+  @wip
   Scenario: Set the opposite environment in the environment defaults
     Given I have the file "Gemfile.penchant" with the content:
       """

lib/penchant.rb

@@ -7,4 +7,9 @@ module Penchant
   autoload :FileProcessor, 'penchant/file_processor'
   autoload :PenchantFile, 'penchant/penchant_file'
   autoload :Defaults, 'penchant/defaults'
+  autoload :Properties, 'penchant/properties'
+  autoload :CustomProperty, 'penchant/custom_property'
+  autoload :PropertyStack, 'penchant/property_stack'
+  autoload :PropertyStackBuilder, 'penchant/property_stack_builder'
+  autoload :PropertyStackProcessor, 'penchant/property_stack_processor'
 end

lib/penchant/custom_property.rb

@@ -0,0 +1,20 @@
+module Penchant
+  class CustomProperty
+    def initialize(value)
+      @value = value
+    end
+
+    def process(values)
+      if @value.respond_to?(:call)
+        @value.call(*values).to_a
+      else
+        @value.collect do |k, v|
+          v = v.dup.gsub(%r{\$(\d+)}) { |m| values[m.to_i - 1 ] }
+
+          [ k, v ]
+        end
+      end
+    end
+  end
+end
+

lib/penchant/file_processor.rb

@@ -21,7 +21,7 @@ module Penchant
       @available_environments = []
       @defined_git_repos = []
       @defaults = Defaults.new
-      @properties = {}
+      @properties = PropertyStackBuilder.new(@defaults)
 
       @_current_env_defaults = {}
     end
@@ -131,9 +131,7 @@ module Penchant
     end
 
     def process_options(gem_name, template = {})
-      properties = {}
+      properties = Properties.new(template)
-
-      property_stack = template.to_a
 
       original_properties = process_option_stack(gem_name, property_stack)
 
@@ -148,36 +146,6 @@ module Penchant
       Hash[properties.sort]
     end
 
-    def process_option_stack(gem_name, stack)
-      property_stack = stack.dup
-      properties = {}
-
-      while !property_stack.empty?
-        key, value = property_stack.shift
-
-        if property = @properties[key]
-          values = [ value ].flatten
-
-          if property.respond_to?(:call)
-            property.call(*values).each do |k, v|
-              property_stack.push([ k, v ])
-            end
-          else
-            property.each do |k, v|
-              v = v.dup.gsub(%r{\$(\d+)}) { |m| values[m.to_i - 1 ] }
-              property_stack.push([ k, v ])
-            end
-          end
-        else
-          value = value % gem_name if value.respond_to?(:%)
-
-          properties[key] = value
-        end
-      end
-
-      properties
-    end
-
     def _defaults_for(gem_name)
       result = @_current_env_defaults
       result.merge(@defaults[gem_name] || {})

lib/penchant/penchant_file.rb

@@ -14,7 +14,7 @@ module Penchant
 
       version = args.first
 
-      options = process_options(gem_name.first, template)
+      options = @properties.create_stack_for(template, @_strip_pathing_options).process_for_gem(gem_name.first, @_current_env_defaults)
 
       args = [ gem_name.first ]
       args << version if version
@@ -36,7 +36,7 @@ module Penchant
       gems, template = split_args(args)
 
       gems.flatten.each do |gem_name|
-        options = process_options(gem_name, template)
+        options = @properties.create_stack_for(template, @_strip_pathing_options).process_for_gem(gem_name)
 
         args = [ gem_name ]
         args << options if !options.empty?

lib/penchant/properties.rb

@@ -0,0 +1,14 @@
+module Penchant
+  class Properties
+    def initialize(template)
+      @properties = {}
+
+      @template = template.to_a
+    end
+
+    def process
+
+    end
+  end
+end
+

lib/penchant/property_stack.rb

@@ -0,0 +1,26 @@
+module Penchant
+  class PropertyStack
+    def initialize(builder, property_stack, strip_pathing_options)
+      @builder, @property_stack, @strip_pathing_options = builder, property_stack.dup, strip_pathing_options
+    end
+
+    def processor
+      @processor ||= PropertyStackProcessor.new(@builder)
+    end
+
+    def process_for_gem(gem_name, additional_env = {})
+      properties = processor.process(gem_name, @property_stack)
+
+      if @strip_pathing_options
+        [ :git, :branch, :path ].each { |key| properties.delete(key) }
+      end
+
+      properties = processor.process(gem_name, @builder.defaults[gem_name].merge(additional_env)).merge(properties)
+
+      properties.delete(:opposite)
+
+      Hash[properties.sort]
+    end
+  end
+end
+

lib/penchant/property_stack_builder.rb

@@ -0,0 +1,23 @@
+module Penchant
+  class PropertyStackBuilder
+    attr_reader :defaults
+
+    def initialize(defaults)
+      @defaults = defaults
+
+      @custom_properties = {}
+    end
+
+    def []=(key, value)
+      @custom_properties[key] = CustomProperty.new(value)
+    end
+
+    def [](key)
+      @custom_properties[key]
+    end
+
+    def create_stack_for(stack, strip_pathing_options = false)
+      PropertyStack.new(self, stack, strip_pathing_options)
+    end
+  end
+end

lib/penchant/property_stack_processor.rb

@@ -0,0 +1,26 @@
+module Penchant
+  class PropertyStackProcessor
+    def initialize(builder)
+      @builder = builder
+    end
+
+    def process(gem_name, stack)
+      properties = {}
+      property_stack = stack.dup.to_a
+
+      while !property_stack.empty?
+        key, value = property_stack.shift
+
+        if property = @builder[key]
+          property_stack += property.process([ value ].flatten)
+        else
+          value = value % gem_name if value.respond_to?(:%)
+
+          properties[key] = value
+        end
+      end
+
+      properties
+    end
+  end
+end