class Inspec::Resources::GemPackage

def info
  return @info if defined?(@info)
  cmd = inspec.command("gem list --local -a -q \^#{@package_name}\$")
  @info = {
    installed: cmd.exit_status == 0,
    type: 'gem',
  }
  return @info unless @info[:installed]
  # extract package name and version
  # parses data like winrm (1.3.4, 1.3.3)
  params = /^\s*([^\(]*?)\s*\((.*?)\)\s*$/.match(cmd.stdout.chomp)
  versions = params[2].split(',')
  @info[:name] = params[1]
  @info[:version] = versions[0]
  @info
end

def initialize(package_name)
  @package_name = package_name
end

def installed?
  info[:installed] == true
end

def to_s
  "gem package #{@package_name}"
end

def version
  info[:version]
end