module Hoe::RubyGems

def define_rubygems_tasks
  gemspec = "#{spec.name}.gemspec"
  deps    = IO.read("Manifest.txt").split
  file gemspec => deps do |t|
    File.open(t.name, "w") { |f| f.write spec.to_ruby }
  end
  desc "Update #{gemspec} if necessary."
  task "gem:spec" => gemspec
  desc "Install gem, with optional prefix."
  task "gem:install", [:prefix] do |t, args|
    spec.name = "#{args.prefix}-#{spec.name}" if args.prefix
    Rake::Task["install_gem"].invoke
  end
end