Download
There are quite a few ways to get your hands on the various engines available. The first thing to do in any case is to get the Engines plugin itself, which is what we’ll cover here.
Rails’ own script/plugin command
The first thing to do is update the plugin command’s list of download sources:
$ ruby script/plugin discover
Now we can install the actual Engines plugin:
$ ruby script/plugin install engines
Alternately, you can explicitly specify the location from which to download and install the engines plugin:
$ ruby script/plugin install git://github.com/lazyatom/engines.git
From this point you can now install plugins as normal - any additional files each plugin provides will automatically become available when your Rails application loads.
git
The engines plugin development mainly happens using git now. Find out more at github…
SVN
The old, irregularly-updated Rails Engines Subversion repository can currently be found at http://svn.rails-engines.org/. The layout for this repository is discussed here.