Bring in module attribute_accessors from motion-support

lib/yapper/config.rb

@@ -1,18 +1,11 @@
 motion_require 'yapper'
+motion_require 'module_attribute_accessors'
 
 module Yapper::Config
   COLLECTION = '_config'
   extend self
 
-  @@db_version = nil unless defined? @@db_version
-
-  def self.db_version
-    @@db_version || 0
-  end
-
-  def self.db_version=(db_version)
-    @@db_version = db_version
-  end
+  mattr_accessor :db_version
 
   def self.get(key)
     Yapper::DB.instance.execute do |txn|

lib/yapper/module_attribute_accessors.rb

@@ -0,0 +1,72 @@
+###########################################################################
+# Pulled from motion-support at:
+#     https://github.com/rubymotion/motion-support
+#
+# There was a conflict with motion-require, and Yapper only needs the
+# concern portion of motion-support.
+###########################################################################
+
+class Module
+  def mattr_reader(*syms)
+    receiver = self
+    options = syms.extract_options!
+    syms.each do |sym|
+      raise NameError.new('invalid attribute name') unless sym =~ /^[_A-Za-z]\w*$/
+      class_exec do
+        unless class_variable_defined?("@@#{sym}")
+          class_variable_set("@@#{sym}", nil)
+        end
+
+        define_singleton_method sym do
+          class_variable_get("@@#{sym}")
+        end
+      end
+
+      unless options[:instance_reader] == false || options[:instance_accessor] == false
+        class_exec do
+          define_method sym do
+            receiver.class_variable_get("@@#{sym}")
+          end
+        end
+      end
+    end
+  end
+
+  def mattr_writer(*syms)
+    receiver = self
+    options = syms.extract_options!
+    syms.each do |sym|
+      raise NameError.new('invalid attribute name') unless sym =~ /^[_A-Za-z]\w*$/
+      class_exec do
+        define_singleton_method "#{sym}=" do |obj|
+          class_variable_set("@@#{sym}", obj)
+        end
+      end
+
+      unless options[:instance_writer] == false || options[:instance_accessor] == false
+        class_exec do
+          define_method "#{sym}=" do |obj|
+            receiver.class_variable_set("@@#{sym}", obj)
+          end
+        end
+      end
+    end
+  end
+
+  # Extends the module object with module and instance accessors for class attributes,
+  # just like the native attr* accessors for instance attributes.
+  #
+  #   module AppConfiguration
+  #     mattr_accessor :google_api_key
+  #
+  #     self.google_api_key = "123456789"
+  #   end
+  #
+  #   AppConfiguration.google_api_key # => "123456789"
+  #   AppConfiguration.google_api_key = "overriding the api key!"
+  #   AppConfiguration.google_api_key # => "overriding the api key!"
+  def mattr_accessor(*syms)
+    mattr_reader(*syms)
+    mattr_writer(*syms)
+  end
+end

lib/yapper/settings.rb

@@ -1,18 +1,11 @@
 motion_require 'yapper'
+motion_require 'module_attribute_accessors'
 
 module Yapper::Settings
   PREFIX = 'yapper-'
   extend self
 
-  @@db_version = nil unless defined? @@db_version
-
-  def self.db_version
-    @@db_version || 0
-  end
-
-  def self.db_version=(db_version)
-    @@db_version = db_version
-  end
+  mattr_accessor :db_version
 
   def get(key)
     value = storage.objectForKey(storage_key(key))

lib/yapper/watch.rb

@@ -1,4 +1,4 @@
-motion_require 'attribute_accessors'
+motion_require 'class_attribute_accessors'
 
 class Yapper::Watch
   cattr_accessor :_observer