puppet_module_version.rb

#
# puppet_module_version.rb
#

require 'puppet/parser/functions'

Puppet::Parser::Functions.newfunction(:puppet_module_version,
                                      :type => :rvalue,
                                      :doc => <<-EOS
This function parses the module version from Modulefile or metadata.json.
EOS
) do |arguments|

  if (arguments.size != 1) then
    raise(Puppet::ParseError, "puppet_module_version(): Wrong number of arguments " +
      "given (#{arguments.size} for 1)")
  end

  environment = Puppet::Node::Environment.new
  puppet_module = environment.module(arguments[0])

  return '0.0.0' if puppet_module.nil?

  metadata = Puppet::ModuleTool::Metadata.new

  modulefile_path = File.join(puppet_module.path, 'Modulefile')
  if File.file?(modulefile_path)
    Puppet::ModuleTool::ModulefileReader.evaluate(metadata, modulefile_path)
  end

  puppet_module.version ||= metadata.version ||= '0.0.0'
end