Which code calls init.rb in a plugin?

Can anyone point me to the code that calls init.rb in a plugin?
install.rb? the code in tasks?

I have installed several plugins but find that they never seem to be
initialized. I like poking around in code but can't seem to find the
code that actually calls init.rb. Nothing I've found on the web seems
to address this.

It occurs to me that there may be an environment variable that needs to
be set to bring in plugins. Any thoughts? Information concerning
plugins seems very limited. I haven't yet found any information about
what is going on in the background to make them work.

Thanks.
DocPneumo
9/4

Presuming that you have a copy of Rails in your /vendor....

Each plugin's init.rb file is ultimated invoked by the 'load_plugin'
method in vendor/rails/railties/lib/initializer.rb. This is invoked
each time your config/environment.rb is read (i.e. each time the
server starts).

The code which calls install.rb is in
vendor/rails/railties/lib/commands/plugin.rb (see
Plugin#run_install_hook), and is only evaluated when you install a
plugin via the script/plugin command.

There are no environment variables which influence the loading of
plugins - any file called 'init.rb' which is in a subdirectory of
/vendor/plugins *should* be evaluated.

Shameless plug: my short cut e-book "Rails Plugins" might be of some
assistance - it'll be available in the next week or so, via
http://www.informit.com/bookstore/product.asp?isbn=0321483510&rl=1

- james

James,

That is a great help. I'll be working my way thru initializer.rb
tonight! The blurb on your coming book looks good. Will watch for it's
release.

Mitch