chef

https://github.com/opscode/chef

Ruby

A systems integration framework, built to bring the benefits of configuration management to your entire infrastructure.

Chef::RunList::RunListExpansion#roles

Returns an array of role names that were expanded; this
includes any roles that were in the original, pre-expansion
run_list as well as roles processed during
expansion. Populated only after #expand is called.

Source | Google | Stack overflow

Edit

git clone [email protected]:opscode/chef.git

cd chef

open lib/chef/run_list/run_list_expansion.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Chef--RunList--RunListExpansion-roles-for-pr

# Commit to git

git add lib/chef/run_list/run_list_expansion.rbgit commit -m "better docs for Chef::RunList::RunListExpansion#roles"

# Open pull request

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

hub fork

git push <your name> -your-name--update-docs-Chef--RunList--RunListExpansion-roles-for-pr

hub pull-request

# Celebrate!