task :spec do
  require 'rubygems'
  Gem::manage_gems
  require 'rake/gempackagetask'

  gemspec = ENV['gemspec'] || ''
  @spec = eval(File.read(gemspec + '.gemspec'))

  Rake::GemPackageTask.new(@spec) do |pkg|
    pkg.need_tar = true
  end
end

task :default => [ :spec, "pkg/#{@spec.name}-#{@spec.version}.gem" ] do
  puts 'generated latest version'
end

desc "build 'n' install"
task :bni => [ :spec, "pkg/#{@spec.name}-#{@spec.version}.gem" ] do
  puts `sudo gem install pkg/#{@spec.name}-#{@spec.version}.gem`
end