Current File : //proc/self/root/opt/alt/ruby20/lib64/ruby/2.0.0/rubygems/command_manager.rb
#--
# 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'
##
# 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::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register_command :outdated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 "While executing gem ... (#{ex.class})\n #{ex.to_s}"
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 "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 "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 "Loading command: #{command_name} (#{e.class})\n\t#{e}"
ui.backtrace e
end
end
end
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