Extracted version from gemspec and placed it in its own file. This is...

Extracted version from gemspec and placed it in its own file. This is consistent with the approach taken by "bundle gem", and is expected by gems such as svenfuchs/gem-release which can be used to bump / tag versions of gems.

railties/lib/rails/generators/rails/plugin_new/plugin_new_generator.rb

@@ -46,6 +46,7 @@ def gitignore
     def lib
       template "lib/%name%.rb"
       template "lib/tasks/%name%_tasks.rake"
+      template "lib/%name%/version.rb"
       if full?
         template "lib/%name%/engine.rb"
       end

railties/lib/rails/generators/rails/plugin_new/templates/%name%.gemspec

-# Provide a simple gemspec so you can easily use your
-# project in your rails apps through git.
+$:.push File.expand_path("../lib", __FILE__)
+
+# Maintain your gem's version:
+require "<%= name %>/version"
+
+# Describe your gem and declare its dependencies:
 Gem::Specification.new do |s|
   s.name        = "<%= name %>"
-  s.version     = "0.0.1"
+  s.version     = <%= camelized %>::VERSION
   s.authors     = ["TODO: Your name"]
   s.email       = ["TODO: Your email"]
   s.homepage    = "TODO"

railties/lib/rails/generators/rails/plugin_new/templates/lib/%name%/version.rb

+module <%= camelized %>
+  VERSION = "0.0.1"
+end