Module: IRB

Defined in:
lib/irb.rb,
lib/irb/help.rb,
lib/irb/init.rb,
lib/irb/color.rb,
lib/irb/frame.rb,
lib/irb/cmd/ls.rb,
lib/irb/locale.rb,
lib/irb/cmd/nop.rb,
lib/irb/context.rb,
lib/irb/version.rb,
lib/irb/cmd/chws.rb,
lib/irb/cmd/fork.rb,
lib/irb/cmd/help.rb,
lib/irb/cmd/info.rb,
lib/irb/cmd/load.rb,
lib/irb/lc/error.rb,
lib/irb/notifier.rb,
lib/irb/inspector.rb,
lib/irb/workspace.rb,
lib/irb/cmd/pushws.rb,
lib/irb/cmd/subirb.rb,
lib/irb/completion.rb,
lib/irb/easter-egg.rb,
lib/irb/ext/loader.rb,
lib/irb/ext/tracer.rb,
lib/irb/magic-file.rb,
lib/irb/cmd/measure.rb,
lib/irb/ext/history.rb,
lib/irb/lc/ja/error.rb,
lib/irb/cmd/whereami.rb,
lib/irb/input-method.rb,
lib/irb/src_encoding.rb,
lib/irb/color_printer.rb,
lib/irb/ext/change-ws.rb,
lib/irb/ext/multi-irb.rb,
lib/irb/output-method.rb,
lib/irb/ext/use-loader.rb,
lib/irb/ext/workspaces.rb,
lib/irb/extend-command.rb,
lib/irb/cmd/show_source.rb,
lib/irb/ext/save-history.rb,
lib/irb/lc/ja/encoding_aliases.rb

Overview

:stopdoc:

Defined Under Namespace

Modules: Color, ContextExtender, ExtendCommand, ExtendCommandBundle, HistorySavingAbility, InputCompletor, IrbLoader, MethodExtender, Notifier Classes: Abort, CantChangeBinding, CantReturnToNormalMode, CantShiftToMultiIrbMode, Canvas, ColorPrinter, Context, DefaultEncodings, FileInputMethod, Frame, History, IllegalParameter, IllegalRCGenerator, InputMethod, Inspector, Irb, IrbAlreadyDead, IrbSwitchedToCurrentThread, JobManager, LoadAbort, Locale, NoSuchJob, NotImplementedError, OutputMethod, ReidlineInputMethod, RubyModel, StdioInputMethod, StdioOutputMethod, UndefinedPromptMode, UnrecognizedSwitch, Vec, WorkSpace

Constant Summary collapse

IRBRC_EXT = 
"rc"
VERSION =

:nodoc:

"1.3.5"
STDIN_FILE_NAME =

:nodoc:

"(line)"

Class Method Summary collapse

Class Method Details

.conf ⇒ Object

Displays current configuration.

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

See IRB@Configuration for more information.



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# File 'lib/irb.rb', line 376

def IRB.conf
  @CONF
end

.CurrentContext ⇒ Object

The current Context in this session



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# File 'lib/irb.rb', line 393

def IRB.CurrentContext
  IRB.conf[:MAIN_CONTEXT]
end

.default_src_encoding ⇒ Object 



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# File 'lib/irb/src_encoding.rb', line 4

def self.default_src_encoding
  return __ENCODING__
end

.delete_caller ⇒ Object 



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# File 'lib/irb/workspace.rb', line 181

def IRB.delete_caller
end

.init_config(ap_path) ⇒ Object 



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# File 'lib/irb/init.rb', line 29

def IRB.init_config(ap_path)
  # class instance variables
  @TRACER_INITIALIZED = false

  # default configurations
  unless ap_path and @CONF[:AP_NAME]
    ap_path = File.join(File.dirname(File.dirname(__FILE__)), "irb.rb")
  end
  @CONF[:AP_NAME] = File::basename(ap_path, ".rb")

  @CONF[:IRB_NAME] = "irb"
  @CONF[:IRB_LIB_PATH] = File.dirname(__FILE__)

  @CONF[:RC] = true
  @CONF[:LOAD_MODULES] = []
  @CONF[:IRB_RC] = nil

  @CONF[:USE_SINGLELINE] = false unless defined?(ReadlineInputMethod)
  @CONF[:USE_COLORIZE] = true
  @CONF[:INSPECT_MODE] = true
  @CONF[:USE_TRACER] = false
  @CONF[:USE_LOADER] = false
  @CONF[:IGNORE_SIGINT] = true
  @CONF[:IGNORE_EOF] = false
  @CONF[:ECHO] = nil
  @CONF[:ECHO_ON_ASSIGNMENT] = nil
  @CONF[:VERBOSE] = nil

  @CONF[:EVAL_HISTORY] = nil
  @CONF[:SAVE_HISTORY] = 1000

  @CONF[:BACK_TRACE_LIMIT] = 16

  @CONF[:PROMPT] = {
    :NULL => {
      :PROMPT_I => nil,
      :PROMPT_N => nil,
      :PROMPT_S => nil,
      :PROMPT_C => nil,
      :RETURN => "%s\n"
    },
    :DEFAULT => {
      :PROMPT_I => "%N(%m):%03n:%i> ",
      :PROMPT_N => "%N(%m):%03n:%i> ",
      :PROMPT_S => "%N(%m):%03n:%i%l ",
      :PROMPT_C => "%N(%m):%03n:%i* ",
      :RETURN => "=> %s\n"
    },
    :CLASSIC => {
      :PROMPT_I => "%N(%m):%03n:%i> ",
      :PROMPT_N => "%N(%m):%03n:%i> ",
      :PROMPT_S => "%N(%m):%03n:%i%l ",
      :PROMPT_C => "%N(%m):%03n:%i* ",
      :RETURN => "%s\n"
    },
    :SIMPLE => {
      :PROMPT_I => ">> ",
      :PROMPT_N => ">> ",
      :PROMPT_S => "%l> ",
      :PROMPT_C => "?> ",
      :RETURN => "=> %s\n"
    },
    :INF_RUBY => {
      :PROMPT_I => "%N(%m):%03n:%i> ",
      :PROMPT_N => nil,
      :PROMPT_S => nil,
      :PROMPT_C => nil,
      :RETURN => "%s\n",
      :AUTO_INDENT => true
    },
    :XMP => {
      :PROMPT_I => nil,
      :PROMPT_N => nil,
      :PROMPT_S => nil,
      :PROMPT_C => nil,
      :RETURN => "    ==>%s\n"
    }
  }

  @CONF[:PROMPT_MODE] = (STDIN.tty? ? :DEFAULT : :NULL)
  @CONF[:AUTO_INDENT] = true

  @CONF[:CONTEXT_MODE] = 4 # use a copy of TOPLEVEL_BINDING
  @CONF[:SINGLE_IRB] = false

  @CONF[:MEASURE] = false
  @CONF[:MEASURE_PROC] = {}
  @CONF[:MEASURE_PROC][:TIME] = proc { |context, code, line_no, &block|
    time = Time.now
    result = block.()
    now = Time.now
    puts 'processing time: %fs' % (now - time) if IRB.conf[:MEASURE]
    result
  }
  @CONF[:MEASURE_PROC][:STACKPROF] = proc { |context, code, line_no, arg, &block|
    success = false
    begin
      require 'stackprof'
      success = true
    rescue LoadError
      puts 'Please run "gem install stackprof" before measuring by StackProf.'
    end
    if success
      result = nil
      stackprof_result = StackProf.run(mode: arg ? arg : :cpu) do
        result = block.()
      end
      StackProf::Report.new(stackprof_result).print_text if IRB.conf[:MEASURE]
      result
    else
      block.()
    end
  }
  @CONF[:MEASURE_CALLBACKS] = []

  @CONF[:LC_MESSAGES] = Locale.new

  @CONF[:AT_EXIT] = []
end

.init_error ⇒ Object 



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# File 'lib/irb/init.rb', line 194

def IRB.init_error
  @CONF[:LC_MESSAGES].load("irb/error.rb")
end

.initialize_tracer ⇒ Object

initialize tracing function



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# File 'lib/irb/ext/tracer.rb', line 30

def IRB.initialize_tracer
  Tracer.verbose = false
  Tracer.add_filter {
    |event, file, line, id, binding, *rests|
    /^#{Regexp.quote(@CONF[:IRB_LIB_PATH])}/ !~ file and
      File::basename(file) != "irb.rb"
  }
end

.inspect ⇒ Object 



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# File 'lib/irb.rb', line 867

def @CONF.inspect
  IRB.version unless self[:VERSION]

  array = []
  for k, v in sort{|a1, a2| a1[0].id2name <=> a2[0].id2name}
    case k
    when :MAIN_CONTEXT, :__TMP__EHV__
      array.push format("CONF[:%s]=...myself...", k.id2name)
    when :PROMPT
      s = v.collect{
        |kk, vv|
        ss = vv.collect{|kkk, vvv| ":#{kkk.id2name}=>#{vvv.inspect}"}
        format(":%s=>{%s}", kk.id2name, ss.join(", "))
      }
      array.push format("CONF[:%s]={%s}", k.id2name, s.join(", "))
    else
      array.push format("CONF[:%s]=%s", k.id2name, v.inspect)
    end
  end
  array.join("\n")
end

.Inspector(inspect, init = nil) ⇒ Object

Convenience method to create a new Inspector, using the given inspect proc, and optional init proc and passes them to Inspector.new

irb(main):001:0> ins = IRB::Inspector(proc{ |v| "omg! #{v}" })
irb(main):001:0> IRB.CurrentContext.inspect_mode = ins # => omg! #<IRB::Inspector:0x007f46f7ba7d28>
irb(main):001:0> "what?" #=> omg! what?



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# File 'lib/irb/inspector.rb', line 24

def IRB::Inspector(inspect, init = nil)
  Inspector.new(inspect, init)
end

.irb(file = nil, *main) ⇒ Object

Creates a new IRB session, see Irb.new.

The optional file argument is given to Context.new, along with the workspace created with the remaining arguments, see WorkSpace.new



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# File 'lib/irb/ext/multi-irb.rb', line 189

def IRB.irb(file = nil, *main)
  workspace = WorkSpace.new(*main)
  parent_thread = Thread.current
  Thread.start do
    begin
      irb = Irb.new(workspace, file)
    rescue
      print "Subirb can't start with context(self): ", workspace.main.inspect, "\n"
      print "return to main irb\n"
      Thread.pass
      Thread.main.wakeup
      Thread.exit
    end
    @CONF[:IRB_RC].call(irb.context) if @CONF[:IRB_RC]
    @JobManager.insert(irb)
    @JobManager.current_job = irb
    begin
      system_exit = false
      catch(:IRB_EXIT) do
        irb.eval_input
      end
    rescue SystemExit
      system_exit = true
      raise
      #fail
    ensure
      unless system_exit
        @JobManager.delete(irb)
        if @JobManager.current_job == irb
          if parent_thread.alive?
            @JobManager.current_job = @JobManager.irb(parent_thread)
            parent_thread.run
          else
            @JobManager.current_job = @JobManager.main_irb
            @JobManager.main_thread.run
          end
        end
      end
    end
  end
  Thread.stop
  @JobManager.current_job = @JobManager.irb(Thread.current)
end

.irb_abort(irb, exception = Abort) ⇒ Object

Aborts then interrupts irb.

Will raise an Abort exception, or the given exception.



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# File 'lib/irb.rb', line 425

def IRB.irb_abort(irb, exception = Abort)
  if defined? Thread
    irb.context.thread.raise exception, "abort then interrupt!"
  else
    raise exception, "abort then interrupt!"
  end
end

.irb_at_exit ⇒ Object

Calls each event hook of IRB.conf[:AT_EXIT] when the current session quits.



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# File 'lib/irb.rb', line 413

def IRB.irb_at_exit
  @CONF[:AT_EXIT].each{|hook| hook.call}
end

.irb_exit(irb, ret) ⇒ Object

Quits irb



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# File 'lib/irb.rb', line 418

def IRB.irb_exit(irb, ret)
  throw :IRB_EXIT, ret
end

.JobManager ⇒ Object

The current JobManager in the session



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# File 'lib/irb/ext/multi-irb.rb', line 176

def IRB.JobManager
  @JobManager
end

.load_modules ⇒ Object

loading modules



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# File 'lib/irb/init.rb', line 371

def IRB.load_modules
  for m in @CONF[:LOAD_MODULES]
    begin
      require m
    rescue LoadError => err
      warn "#{err.class}: #{err}", uplevel: 0
    end
  end
end

.parse_opts(argv: ::ARGV) ⇒ Object

option analyzing



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# File 'lib/irb/init.rb', line 199

def IRB.parse_opts(argv: ::ARGV)
  load_path = []
  while opt = argv.shift
    case opt
    when "-f"
      @CONF[:RC] = false
    when "-d"
      $DEBUG = true
      $VERBOSE = true
    when "-w"
      Warning[:deprecated] = $VERBOSE = true
    when /^-W(.+)?/
      opt = $1 || argv.shift
      case opt
      when "0"
        $VERBOSE = nil
      when "1"
        $VERBOSE = false
      else
        Warning[:deprecated] = $VERBOSE = true
      end
    when /^-r(.+)?/
      opt = $1 || argv.shift
      @CONF[:LOAD_MODULES].push opt if opt
    when /^-I(.+)?/
      opt = $1 || argv.shift
      load_path.concat(opt.split(File::PATH_SEPARATOR)) if opt
    when '-U'
      set_encoding("UTF-8", "UTF-8")
    when /^-E(.+)?/, /^--encoding(?:=(.+))?/
      opt = $1 || argv.shift
      set_encoding(*opt.split(':', 2))
    when "--inspect"
      if /^-/ !~ argv.first
        @CONF[:INSPECT_MODE] = argv.shift
      else
        @CONF[:INSPECT_MODE] = true
      end
    when "--noinspect"
      @CONF[:INSPECT_MODE] = false
    when "--singleline", "--readline", "--legacy"
      @CONF[:USE_SINGLELINE] = true
    when "--nosingleline", "--noreadline"
      @CONF[:USE_SINGLELINE] = false
    when "--multiline", "--reidline"
      @CONF[:USE_MULTILINE] = true
    when "--nomultiline", "--noreidline"
      @CONF[:USE_MULTILINE] = false
    when "--echo"
      @CONF[:ECHO] = true
    when "--noecho"
      @CONF[:ECHO] = false
    when "--echo-on-assignment"
      @CONF[:ECHO_ON_ASSIGNMENT] = true
    when "--noecho-on-assignment"
      @CONF[:ECHO_ON_ASSIGNMENT] = false
    when "--truncate-echo-on-assignment"
      @CONF[:ECHO_ON_ASSIGNMENT] = :truncate
    when "--verbose"
      @CONF[:VERBOSE] = true
    when "--noverbose"
      @CONF[:VERBOSE] = false
    when "--colorize"
      @CONF[:USE_COLORIZE] = true
    when "--nocolorize"
      @CONF[:USE_COLORIZE] = false
    when /^--prompt-mode(?:=(.+))?/, /^--prompt(?:=(.+))?/
      opt = $1 || argv.shift
      prompt_mode = opt.upcase.tr("-", "_").intern
      @CONF[:PROMPT_MODE] = prompt_mode
    when "--noprompt"
      @CONF[:PROMPT_MODE] = :NULL
    when "--inf-ruby-mode"
      @CONF[:PROMPT_MODE] = :INF_RUBY
    when "--sample-book-mode", "--simple-prompt"
      @CONF[:PROMPT_MODE] = :SIMPLE
    when "--tracer"
      @CONF[:USE_TRACER] = true
    when /^--back-trace-limit(?:=(.+))?/
      @CONF[:BACK_TRACE_LIMIT] = ($1 || argv.shift).to_i
    when /^--context-mode(?:=(.+))?/
      @CONF[:CONTEXT_MODE] = ($1 || argv.shift).to_i
    when "--single-irb"
      @CONF[:SINGLE_IRB] = true
    when "-v", "--version"
      print IRB.version, "\n"
      exit 0
    when "-h", "--help"
      require_relative "help"
      IRB.print_usage
      exit 0
    when "--"
      if opt = argv.shift
        @CONF[:SCRIPT] = opt
        $0 = opt
      end
      break
    when /^-/
      fail UnrecognizedSwitch, opt
    else
      @CONF[:SCRIPT] = opt
      $0 = opt
      break
    end
  end
  load_path.collect! do |path|
    /\A\.\// =~ path ? path : File.expand_path(path)
  end
  $LOAD_PATH.unshift(*load_path)

end

.print_usage ⇒ Object

Outputs the irb help message, see IRB@Command+line+options.



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# File 'lib/irb/help.rb', line 17

def IRB.print_usage
  lc = IRB.conf[:LC_MESSAGES]
  path = lc.find("irb/help-message")
  space_line = false
  IRB::MagicFile.open(path){|f|
    f.each_line do |l|
      if /^\s*$/ =~ l
        lc.puts l unless space_line
        space_line = true
        next
      end
      space_line = false

      l.sub!(/#.*$/, "")
      next if /^\s*$/ =~ l
      lc.puts l
    end
  }
end

.rc_file(ext = IRBRC_EXT) ⇒ Object 



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# File 'lib/irb/init.rb', line 328

def IRB.rc_file(ext = IRBRC_EXT)
  if !@CONF[:RC_NAME_GENERATOR]
    rc_file_generators do |rcgen|
      @CONF[:RC_NAME_GENERATOR] ||= rcgen
      if File.exist?(rcgen.call(IRBRC_EXT))
        @CONF[:RC_NAME_GENERATOR] = rcgen
        break
      end
    end
  end
  case rc_file = @CONF[:RC_NAME_GENERATOR].call(ext)
  when String
    return rc_file
  else
    fail IllegalRCNameGenerator
  end
end

.rc_file_generators {|proc{|rc| current_dir+"/.config/irb/irb#{rc}"}| ... } ⇒ Object

enumerate possible rc-file base name generators

Yields:

  • (proc{|rc| current_dir+"/.config/irb/irb#{rc}"}) 


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# File 'lib/irb/init.rb', line 347

def IRB.rc_file_generators
  if irbrc = ENV["IRBRC"]
    yield proc{|rc| rc == "rc" ? irbrc : irbrc+rc}
  end
  if xdg_config_home = ENV["XDG_CONFIG_HOME"]
    irb_home = File.join(xdg_config_home, "irb")
    unless File.exist? irb_home
      require 'fileutils'
      FileUtils.mkdir_p irb_home
    end
    yield proc{|rc| irb_home + "/irb#{rc}"}
  end
  if home = ENV["HOME"]
    yield proc{|rc| home+"/.irb#{rc}"}
  end
  current_dir = Dir.pwd
  yield proc{|rc| current_dir+"/.config/irb/irb#{rc}"}
  yield proc{|rc| current_dir+"/.irb#{rc}"}
  yield proc{|rc| current_dir+"/irb#{rc.sub(/\A_?/, '.')}"}
  yield proc{|rc| current_dir+"/_irb#{rc}"}
  yield proc{|rc| current_dir+"/$irb#{rc}"}
end

.run_config ⇒ Object

running config



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# File 'lib/irb/init.rb', line 312

def IRB.run_config
  if @CONF[:RC]
    begin
      load rc_file
    rescue LoadError, Errno::ENOENT
    rescue # StandardError, ScriptError
      print "load error: #{rc_file}\n"
      print $!.class, ": ", $!, "\n"
      for err in $@[0, $@.size - 2]
        print "\t", err, "\n"
      end
    end
  end
end

.set_measure_callback(type = nil, arg = nil, &block) ⇒ Object 



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# File 'lib/irb/init.rb', line 149

def IRB.set_measure_callback(type = nil, arg = nil, &block)
  added = nil
  if type
    type_sym = type.upcase.to_sym
    if IRB.conf[:MEASURE_PROC][type_sym]
      added = [type_sym, IRB.conf[:MEASURE_PROC][type_sym], arg]
    end
  elsif IRB.conf[:MEASURE_PROC][:CUSTOM]
    added = [:CUSTOM, IRB.conf[:MEASURE_PROC][:CUSTOM], arg]
  elsif block_given?
    added = [:BLOCK, block, arg]
    found = IRB.conf[:MEASURE_CALLBACKS].find{ |m| m[0] == added[0] && m[2] == added[2] }
    if found
      found[1] = block
      return added
    else
      IRB.conf[:MEASURE_CALLBACKS] << added
      return added
    end
  else
    added = [:TIME, IRB.conf[:MEASURE_PROC][:TIME], arg]
  end
  if added
    found = IRB.conf[:MEASURE_CALLBACKS].find{ |m| m[0] == added[0] && m[2] == added[2] }
    if found
      # already added
      nil
    else
      IRB.conf[:MEASURE_CALLBACKS] << added if added
      added
    end
  else
    nil
  end
end

.setup(ap_path, argv: ::ARGV) ⇒ Object

initialize config



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# File 'lib/irb/init.rb', line 16

def IRB.setup(ap_path, argv: ::ARGV)
  IRB.init_config(ap_path)
  IRB.init_error
  IRB.parse_opts(argv: argv)
  IRB.run_config
  IRB.load_modules

  unless @CONF[:PROMPT][@CONF[:PROMPT_MODE]]
    fail UndefinedPromptMode, @CONF[:PROMPT_MODE]
  end
end

.start(ap_path = nil) ⇒ Object

Initializes IRB and creates a new Irb.irb object at the TOPLEVEL_BINDING



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# File 'lib/irb.rb', line 398

def IRB.start(ap_path = nil)
  STDOUT.sync = true
  $0 = File::basename(ap_path, ".rb") if ap_path

  IRB.setup(ap_path)

  if @CONF[:SCRIPT]
    irb = Irb.new(nil, @CONF[:SCRIPT])
  else
    irb = Irb.new
  end
  irb.run(@CONF)
end

.unset_measure_callback(type = nil) ⇒ Object 



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# File 'lib/irb/init.rb', line 185

def IRB.unset_measure_callback(type = nil)
  if type.nil?
    IRB.conf[:MEASURE_CALLBACKS].clear
  else
    type_sym = type.upcase.to_sym
    IRB.conf[:MEASURE_CALLBACKS].reject!{ |t, | t == type_sym }
  end
end

.version ⇒ Object

Returns the current version of IRB, including release version and last updated date.



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# File 'lib/irb.rb', line 382

def IRB.version
  if v = @CONF[:VERSION] then return v end

  @CONF[:VERSION] = format("irb %s (%s)", @RELEASE_VERSION, @LAST_UPDATE_DATE)
end