state_machine

https://github.com/pluginaweek/state_machine

Ruby

Adds support for creating state machines for attributes on any Ruby class

StateMachine::Machine.draw

Draws the state machines defined in the given classes using GraphViz.
The given classes must be a comma-delimited string of class names.

Configuration options:
* <tt>:file</tt> - A comma-delimited string of files to load that
  contain the state machine definitions to draw
* <tt>:path</tt> - The path to write the graph file to
* <tt>:format</tt> - The image format to generate the graph in
* <tt>:font</tt> - The name of the font to draw state names in

Source | Google | Stack overflow

Edit

git clone [email protected]:pluginaweek/state_machine.git

cd state_machine

open lib/state_machine/machine.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-StateMachine--Machine-draw-for-pr

# Commit to git

git add lib/state_machine/machine.rbgit commit -m "better docs for StateMachine::Machine.draw"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-StateMachine--Machine-draw-for-pr

hub pull-request

# Celebrate!