pry--pry/lib/pry/commands/gem_open.rb

class Pry
  class Command::GemOpen < Pry::ClassCommand
    match 'gem-open'
    group 'Gems'
    description 'Opens the working directory of the gem in your editor.'
    command_options argument_required: true

    banner <<-'BANNER'
      Usage: gem-open GEM_NAME

      Change the current working directory to that in which the given gem is
      installed, and then opens your text editor.

      gem-open pry-exception_explorer
    BANNER

    def process(gem)
      Dir.chdir(Rubygem.spec(gem).full_gem_path) do
        Pry::Editor.new(_pry_).invoke_editor(".", 0, false)
      end
    end

    def complete(str)
      Rubygem.complete(str)
    end
  end

  Pry::Commands.add_command(Pry::Command::GemOpen)
end