gem-compare rake task example

gistfile1.rb

# From Rakefile, expects :build task

task :clean do
  `rm -rf pkg`
end

# Compare latest release with current git head
require 'rubygems/comparator'
task compare: [:clean, :build] do
  git_version = VagrantPlugins::Registration::VERSION
  options = {}
  options[:output] = 'pkg'
  options[:keep_all] = true
  comparator = Gem::Comparator.new(options)
  comparator.compare_versions('vagrant-registration', ['_', git_version])
  comparator.print_results
end