Bundler: a gem to bundle gems
Bundler is a tool that manages gem dependencies for your ruby application. It takes a gem manifest file and is able to fetch, download, and install the gems and all child dependencies specified in this manifest. It can manage any update to the gem manifest file and update the bundle's gems accordingly. It also lets you run any ruby code in context of the bundle's gem environment.
Installation and usage
See gembundler.com for up-to-date installation and usage instructions.
For help with common problems, see ISSUES.
Upgrading from Bundler 0.8 to 0.9 and above
Feel free to chat with the Bundler core team (and many other users) on IRC in the #bundler channel on Freenode, or via email on the Bundler mailing list.