Rakefile

#!/usr/bin/env ruby

require 'bundler/setup'
require 'rspec/core/rake_task'
require 'colorize'

RSpec::Core::RakeTask.new('spec')

desc 'build gem'
task :build do
  build_output = `gem build roust.gemspec`
  puts build_output

  gem_filename = build_output[/File: (.*)/, 1]
  pkg_path = 'pkg'
  FileUtils.mkdir_p(pkg_path)
  FileUtils.mv(gem_filename, pkg_path)

  puts "Gem built in #{pkg_path}/#{gem_filename}".green
end

desc 'push gem'
task :push do
  filenames = Dir.glob('pkg/*.gem')
  filenames_with_times = filenames.map do |filename|
    [filename, File.mtime(filename)]
  end

  newest = filenames_with_times.sort_by { |tuple| tuple.last }.last
  newest_filename = newest.first

  command = "gem push #{newest_filename}"
  system(command)
end

task :default => [:spec]