chef

https://github.com/opscode/chef

Ruby

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

Chef::Cookbook::Metadata#handle_deprecated_constraints

This method translates version constraint strings from
cookbooks with the old format.

Before we began respecting version constraints, we allowed
multiple constraints to be placed on cookbooks, as well as the
<< and >> operators, which are now just < and >. For
specifications with more than one constraint, we return an
empty array (otherwise, we're silently abiding only part of
the contract they have specified to us). If there is only one
constraint, we are replacing the old << and >> with the new <
and >.

Source | Google | Stack overflow

Edit

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

cd chef

open lib/chef/cookbook/metadata.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Chef--Cookbook--Metadata-handle_deprecated_constraints-for-pr

# Commit to git

git add lib/chef/cookbook/metadata.rbgit commit -m "better docs for Chef::Cookbook::Metadata#handle_deprecated_constraints"

# 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--Cookbook--Metadata-handle_deprecated_constraints-for-pr

hub pull-request

# Celebrate!