chef

https://github.com/opscode/chef

Ruby

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

Chef::Provider::Package::Rubygems::GemEnvironment#installed_versions

Lists the installed versions of +gem_name+, constrained by the
version spec in +gem_dep+
=== Arguments
Gem::Dependency   +gem_dep+ is a Gem::Dependency object, its version
                  specification constrains which gems are returned.
=== Returns
[Gem::Specification]  an array of Gem::Specification objects

Source | Google | Stack overflow

Edit

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

cd chef

open lib/chef/provider/package/rubygems.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Chef--Provider--Package--Rubygems--GemEnvironment-installed_versions-for-pr

# Commit to git

git add lib/chef/provider/package/rubygems.rbgit commit -m "better docs for Chef::Provider::Package::Rubygems::GemEnvironment#installed_versions"

# 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--Provider--Package--Rubygems--GemEnvironment-installed_versions-for-pr

hub pull-request

# Celebrate!