Gem::CommandManager

The command manager registers and installs all the individual sub-commands supported by the gem command.

Extra commands can be provided by writing a rubygems_plugin.rb file in an installed gem. You should register your command against the Gem::CommandManager instance, like this:

# file rubygems_plugin.rb
require 'rubygems/command_manager'

class Gem::Commands::EditCommand < Gem::Command
  # ...
end

Gem::CommandManager.instance.register_command :edit

See Gem::Command for instructions on writing gem commands.