Module: IRB::ExtendCommandBundle

Defined in:
lib/irb/extend-command.rb,
lib/irb/ext/use-loader.rb

Overview

IRB extended command

Constant Summary collapse

EXCB = 
ExtendCommandBundle
NO_OVERRIDE = 
0
OVERRIDE_PRIVATE_ONLY = 
0x01
OVERRIDE_ALL = 
0x02

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.def_extend_command(cmd_name, cmd_class, load_file = nil, *aliases) ⇒ Object

aliases = [commands_alias, flag], ...



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# File 'lib/irb/extend-command.rb', line 115

def self.def_extend_command(cmd_name, cmd_class, load_file = nil, *aliases)
  case cmd_class
  when Symbol
	cmd_class = cmd_class.id2name
  when String
  when Class
	cmd_class = cmd_class.name
  end

  if load_file
	line = __LINE__; eval %[
	  def #{cmd_name}(*opts, &b)
 require "#{load_file}"
 arity = ExtendCommand::#{cmd_class}.instance_method(:execute).arity
 args = (1..(arity < 0 ? ~arity : arity)).map {|i| "arg" + i.to_s }
 args << "*opts" if arity < 0
 args << "&block"
 args = args.join(", ")
 line = __LINE__; eval %[
   def #{cmd_name}(\#{args})
		ExtendCommand::#{cmd_class}.execute(irb_context, \#{args})
   end
 ], nil, __FILE__, line
 send :#{cmd_name}, *opts, &b
	  end
	], nil, __FILE__, line
  else
	line = __LINE__; eval %[
	  def #{cmd_name}(*opts, &b)
 ExtendCommand::#{cmd_class}.execute(irb_context, *opts, &b)
	  end
	], nil, __FILE__, line
  end

  for ali, flag in aliases
	@ALIASES.push [ali, cmd_name, flag]
  end
end

.extend_object(obj) ⇒ Object 



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# File 'lib/irb/extend-command.rb', line 179

def self.extend_object(obj)
  unless (class << obj; ancestors; end).include?(EXCB)
	super
	for ali, com, flg in @ALIASES
	  obj.install_alias_method(ali, com, flg)
	end
  end
end

.install_extend_commands ⇒ Object 



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# File 'lib/irb/extend-command.rb', line 108

def self.install_extend_commands
  for args in @EXTEND_COMMANDS
	def_extend_command(*args)
  end
end

.irb_original_method_name(method_name) ⇒ Object 



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# File 'lib/irb/extend-command.rb', line 175

def self.irb_original_method_name(method_name)
  "irb_" + method_name + "_org"
end

Instance Method Details

#install_alias_method(to, from, override = NO_OVERRIDE) ⇒ Object

override = OVERRIDE_PRIVATE_ONLY, OVERRIDE_ALL



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# File 'lib/irb/extend-command.rb', line 155

def install_alias_method(to, from, override = NO_OVERRIDE)
  to = to.id2name unless to.kind_of?(String)
  from = from.id2name unless from.kind_of?(String)

  if override == OVERRIDE_ALL or
	  (override == OVERRIDE_PRIVATE_ONLY) && !respond_to?(to) or
	  (override == NO_OVERRIDE) &&  !respond_to?(to, true)
	target = self
	(class << self; self; end).instance_eval{
	  if target.respond_to?(to, true) &&
   !target.respond_to?(EXCB.irb_original_method_name(to), true)
 alias_method(EXCB.irb_original_method_name(to), to)
	  end
	  alias_method to, from
	}
  else
	print "irb: warn: can't alias #{to} from #{from}.\n"
  end
end

#irb_context ⇒ Object 



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# File 'lib/irb/extend-command.rb', line 26

def irb_context
  IRB.CurrentContext
end

#irb_exit(ret = 0) ⇒ Object 



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# File 'lib/irb/extend-command.rb', line 22

def irb_exit(ret = 0)
  irb_context.exit(ret)
end

#irb_load(*opts, &b) ⇒ Object 



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# File 'lib/irb/ext/use-loader.rb', line 22

def irb_load(*opts, &b)
  ExtendCommand::Load.execute(irb_context, *opts, &b)
end

#irb_require(*opts, &b) ⇒ Object 



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# File 'lib/irb/ext/use-loader.rb', line 25

def irb_require(*opts, &b)
  ExtendCommand::Require.execute(irb_context, *opts, &b)
end