gemfile-from-dotgems dot-gems-file [, dot-gems-file ...]
gemfile-from-dotgems < .gems
gemfile-from-dotgems < .gems > Gemfile

Update a Rails 2.3 application to use Bundler:

* Generates a Gemfile from your config.gem lines and heroku .gems file (if present)
* Adds the necessary code in config/boot.rb and the config/preinitializer.rb file
* Excises the config.gem lines from your environment files and the .gems file
* If run on a git repository with a clean stage, stage all the changes made

Usage:
  gemfile-rails [PATH]

PATH is the path to your rails application. If not provided, the working directory is assumed.

See also:
  http://gembundler.com/
  http://gembundler.com/rails23.html
  http://docs.heroku.com/gems
  http://docs.heroku.com/bundler