def define_resource_requirements
requirements.assert(:install) do |a|
a.assertion { ((@new_resource.version != nil) && !(target_version_already_installed?)) \
|| !(@current_resource.version.nil? && candidate_version.nil?) }
a.failure_message(Chef::Exceptions::Package, "No version specified, and no candidate version available for #{@new_resource.package_name}")
a.whyrun("Assuming a repository that offers #{@new_resource.package_name} would have been configured")
end
requirements.assert(:upgrade) do |a|
a.assertion { !(@current_resource.version.nil? && candidate_version.nil?) }
a.failure_message(Chef::Exceptions::Package, "No candidate version available for #{@new_resource.package_name}")
a.whyrun("Assuming a repository that offers #{@new_resource.package_name} would have been configured")
end
end