How do I check if Chef's version mets a gem requirement from inside a recipe?

Question

Chef::Version contains the version number of the Chef gem, and I want to check that it meets the gem requirement of ~> 10.14 inside a recipe.

Answer 1

Alternatively, you can use Chef’s built-in version comparison mechanisms (available since at least Chef 12):

Chef::VersionConstraint.new('>= 14.0.0').include? Chef::VERSION

Answer 2

Use Gem::Requirement and Gem::Version:

Gem::Requirement.new("~> 10.14").satisfied_by?(Gem::Version.new(Chef::VERSION))

This returns a boolean value - true if Chef::VERSION satisfies ~> 10.14.