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#-- # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others. # All rights reserved. # See LICENSE.txt for permissions. #++ require 'rubygems/command' require 'rubygems/user_interaction' require 'rubygems/text' ## # 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' # # Gem::CommandManager.instance.register_command :edit # # You should put the implementation of your command in rubygems/commands. # # # file rubygems/commands/edit_command.rb # class Gem::Commands::EditCommand < Gem::Command # # ... # end # # See Gem::Command for instructions on writing gem commands. class Gem::CommandManager include Gem::Text include Gem::UserInteraction ## # Return the authoritative instance of the command manager. def self.instance @command_manager ||= new end ## # Returns self. Allows a CommandManager instance to stand # in for the class itself. def instance self end ## # Reset the authoritative instance of the command manager. def self.reset @command_manager = nil end ## # Register all the subcommands supported by the gem command. def initialize require 'timeout' @commands = {} register_command :build register_command :cert register_command :check register_command :cleanup register_command :contents register_command :dependency register_command :environment register_command :fetch register_command :generate_index register_command :help register_command :install register_command :list register_command :lock register_command :mirror register_command :outdated register_command :owner register_command :pristine register_command :push register_command :query register_command :rdoc register_command :search register_command :server register_command :sources register_command :specification register_command :stale register_command :uninstall register_command :unpack register_command :update register_command :which register_command :yank end ## # Register the Symbol +command+ as a gem command. def register_command(command, obj=false) @commands[command] = obj end ## # Unregister the Symbol +command+ as a gem command. def unregister_command(command) @commands.delete command end ## # Returns a Command instance for +command_name+ def [](command_name) command_name = command_name.intern return nil if @commands[command_name].nil? @commands[command_name] ||= load_and_instantiate(command_name) end ## # Return a sorted list of all command names as strings. def command_names @commands.keys.collect {|key| key.to_s}.sort end ## # Run the command specified by +args+. def run(args, build_args=nil) process_args(args, build_args) rescue StandardError, Timeout::Error => ex alert_error clean_text("While executing gem ... (#{ex.class})\n #{ex}") ui.backtrace ex if Gem.configuration.really_verbose and \ ex.kind_of?(Gem::Exception) and ex.source_exception e = ex.source_exception ui.errs.puts "Because of: (#{e.class})\n #{e.to_s}" ui.backtrace e end terminate_interaction(1) rescue Interrupt alert_error clean_text("Interrupted") terminate_interaction(1) end def process_args(args, build_args=nil) args = args.to_str.split(/\s+/) if args.respond_to?(:to_str) if args.empty? then say Gem::Command::HELP terminate_interaction 1 end case args.first when '-h', '--help' then say Gem::Command::HELP terminate_interaction 0 when '-v', '--version' then say Gem::VERSION terminate_interaction 0 when /^-/ then alert_error clean_text("Invalid option: #{args.first}. See 'gem --help'.") terminate_interaction 1 else cmd_name = args.shift.downcase cmd = find_command cmd_name cmd.invoke_with_build_args args, build_args end end def find_command(cmd_name) possibilities = find_command_possibilities cmd_name if possibilities.size > 1 then raise Gem::CommandLineError, "Ambiguous command #{cmd_name} matches [#{possibilities.join(', ')}]" elsif possibilities.empty? then raise Gem::CommandLineError, "Unknown command #{cmd_name}" end self[possibilities.first] end def find_command_possibilities(cmd_name) len = cmd_name.length found = command_names.select { |name| cmd_name == name[0, len] } exact = found.find { |name| name == cmd_name } exact ? [exact] : found end private def load_and_instantiate(command_name) command_name = command_name.to_s const_name = command_name.capitalize.gsub(/_(.)/) { $1.upcase } << "Command" load_error = nil begin begin require "rubygems/commands/#{command_name}_command" rescue LoadError => e load_error = e end Gem::Commands.const_get(const_name).new rescue Exception => e e = load_error if load_error alert_error clean_text("Loading command: #{command_name} (#{e.class})\n\t#{e}") ui.backtrace e end end end