Colin Law wrote in post #1034532:
Can you clarify exactly what you mean please? Give an example of what
you are trying to achieve. Also tell us which version(s) of rails you
are interested in as the answer may vary.
The link that Craig gave explained the solution:
It was enough to add `:path => ` to Gemfile:
gem 'rails', '~>3.1.0', :path => "path/to/my/clone/of/rails"
(i actually copied the folder with my copy of rails git repository to
After that my sample application started using this copy of rails
instead of rails gem.