How to install Rails 3 master from GitHub

Question

I'm using rvm (Ruby Version Manager) and running Rails 3 RC. I need to test an app to see if a bug has been resolved with a recent commit to Rails 3 master on GitHub.

How do I install Rails 3 master from GitHub and then generate a new app?

I can't use gem install rails --pre because I want the edge version, not the release candidate.

Can you suggest a helpful gist or blog post?

All I could find was this: http://weblog.rubyonrails.org/2010/1/1/getting-a-new-app-running-on-edge and it is out-of-date.

Thanks!

Answer 1

Why not take a look through the commit log here: http://github.com/rails/rails/commits/master before cloning the repository? I don't know what bug you are looking for but remember, you can also look at the "diffs" from each commit to see what has changed.

Answer 2

You can do this with your rails 3 app Gemfile. Bundler is able to install directly from github and if you dont specify a branch or tag then it will use master. Add this to your Gemfile after you generate your rails 3 app, and then run bundle install and start up your app. After you bundle install it will show you the commit number in Gemfile.lock.. it should be the latest commit number from the master rails repo. Here is what I do in my Gemfile:

gem 'rails', :git => 'git://github.com/rails/rails.git' 
#gem 'rails', '3.0.0.rc'

I just uncomment and comment these 2 lines to switch b/w RC and master... and bundle install.

Alternately, you can clone the repo and then use your local source in the Gemfile:

I think it should look something like this (untested):

gem 'rails', :require => 'rails', :path => "/path_to/rails"