What is rails3 application builder?

Question

Depending on the use of rails:

$ rails new --help Usage: rails new APP_PATH [options] Options: -b, [--builder=BUILDER] # Path to a application builder (can be a filesystem path or URL) [--old-style-hash] # Force using old style hash (:foo => 'bar') on Ruby >= 1.9 [--skip-gemfile] # Don't create a Gemfile 

What does this “application builder” mean and how does it compare with the application template (option -m)?

Answer 1

Descriptions in the Doc API

The application builder allows you to redefine the elements of the application generator without having to cancel the default generator operations.

In a nutshell, you can define your default set of dependencies before creating a new rails application.

Check this post for more information.