plugin_example.rb

#
# Creates a new CommandSet and automatically mixes it into Pry::Commands.
#
Pry.plugin :test do

  settings do
    bool   :make_awesome,     :default => true
    enum   :goat_type,        :default => "plain", :options => %w[ plain mountain billy ]
    string :favorite_goat,    :default => "Super Dave the Goat", :validate => proc { goat[/super/i] }
    int    :expire_goats,     :default => 5.minutes
  end

  helpers do
    def helper
      "I HELP GOATS"
    end
  end

  command "help-a-goat" do
    output.puts helper
  end

  # A stand-alone setting (to keep related things grouped together)
  setting :max_goats, :default => proc { free_memory / goat_size }

  command "add-goat" do |arg|
    @goats ||= []
    raise InvalidGoatError if @goats.size > settings.max_goats
    @goats << Goat.new(arg)
  end

end