# module IRB::ExtendCommandBundle

Installs the default irb extensions command bundle.

### Constants

NO_OVERRIDE

  See install_alias_method.

OVERRIDE_ALL

  See install_alias_method.

OVERRIDE_PRIVATE_ONLY

  See install_alias_method.

### Public Class Methods

def_extend_command(cmd_name, cmd_class, load_file = nil, *aliases) click to toggle source

Evaluate the given `cmd_name` on the given `cmd_class` Class.

Will also define any given `aliases` for the method.

The optional `load_file` parameter will be required within the method definition.

    # File lib/irb/extend-command.rb, line 130
    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) click to toggle source

Installs alias methods for the default irb commands on the given object using install_alias_method.

Calls superclass method

    # File lib/irb/extend-command.rb, line 197
    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() click to toggle source

Installs the default irb commands:

`irb_current_working_workspace`

  IRB::Context#main

`irb_change_workspace`

  IRB::Context#change_workspace

`irb_workspaces`

  IRB::Context#workspaces

`irb_push_workspace`

  IRB::Context#push_workspace

`irb_pop_workspace`

  IRB::Context#pop_workspace

`irb_load`

  irb_load

`irb_require`

  irb_require

`irb_source`

  IRB::IrbLoader#source_file

`irb`

  IRB.irb

`irb_jobs`

  JobManager

`irb_fg`

  IRB::JobManager#switch

`irb_kill`

  IRB::JobManager#kill

`irb_help`

  Command line options at IRB

    # File lib/irb/extend-command.rb, line 118
    def self.install_extend_commands
      for args in @EXTEND_COMMANDS
        def_extend_command(*args)
      end
    end

### Public Instance Methods

install_alias_method(to, from, override = NO_OVERRIDE) click to toggle source

Installs alias methods for the default irb commands, see ::install_extend_commands.

    # File lib/irb/extend-command.rb, line 171
    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() click to toggle source

Displays current configuration.

Modifing the configuration is achieved by sending a message to IRB.conf.

    # File lib/irb/extend-command.rb, line 35
    def irb_context
      IRB.CurrentContext
    end

irb_exit(ret = 0) click to toggle source

Quits the current irb context

`ret` is the optional signal or message to send to IRB::Context#exit

Same as `IRB.CurrentContext.exit`.

    # File lib/irb/extend-command.rb, line 28
    def irb_exit(ret = 0)
      irb_context.exit(ret)
    end

irb_load(*opts, &b) click to toggle source

Loads the given file similarly to Kernel#load, see IRB::IrbLoader#irb_load

    # File lib/irb/ext/use-loader.rb, line 23
    def irb_load(*opts, &b)
      ExtendCommand::Load.execute(irb_context, *opts, &b)
    end

irb_require(*opts, &b) click to toggle source

Loads the given file similarly to Kernel#require

    # File lib/irb/ext/use-loader.rb, line 27
    def irb_require(*opts, &b)
      ExtendCommand::Require.execute(irb_context, *opts, &b)
    end