Backport lib/reline, and lib/irb for 3.0.1 3rd (#4228)

* [ruby/irb] Suppress error when File::ALT_SEPARATOR is nil

96accf3b95

* [ruby/irb] Suppress colorize on Windows tests

5be9354cf9

* [ruby/irb] The command "irb_info" should show RUBY_PLATFORM

39d1cd874f

* [ruby/irb] Fix inverse separator condition

33f933196f

* [ruby/reline] Return 1 when char width not found

This fixes ruby/reline#261.

3cf1213014

* [ruby/reline] Avoid tripping over nil prompt

d4d9d3e3d4

* [ruby/reline] Move script files for yamatanooroti tests

03031b885d

* [ruby/reline] Add a test for suppressing crash when dynamic prompt returns empty

ref. https://github.com/ruby/reline/pull/262

b98bc3c329

* [ruby/reline] We still need support new and legacy behavior.
Revert "Support for change in Windows-specific behavior at eol"

This reverts commit cad4de6ee841b43f3f0e441626f9415c3eda0f82.

646587fc2c

* [ruby/reline] check ENABLE_VIRTUAL_TERMINAL_PROCESSING flag and switch eof processing

3535676689

* [ruby/reline] Use UTF-8 only for width calc, rest uses original encoding

I confirmed that libvterm supports only which are UTF-8, US ASCII, UK, and
DEC graphics by reading source code, so can't test this patch by
yamatanoorogi gem through vterm gem for now.

This fixes ruby/irb#190.

44596c0cc7

* [ruby/reline] fix Reline::Windows.getconsolemode buffer

use double quotes to properly convert the \000 escape sequence.

236dfe5683

* [ruby/irb] Version 1.3.4

ab9852ccc5

* [ruby/reline] Version 0.2.4

462f971bd3

Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>
Co-authored-by: Eamonn Webster <eamonn.webster@gmail.com>
Co-authored-by: Yoshinao Muramatu <ysno@ac.auone-net.jp>
Co-authored-by: cremno <cremno@mail.ru>

lib/irb/cmd/info.rb

@@ -13,6 +13,7 @@ module IRB
             str += "IRB version: #{IRB.version}\n"
             str += "InputMethod: #{IRB.CurrentContext.io.inspect}\n"
             str += ".irbrc path: #{IRB.rc_file}\n" if File.exist?(IRB.rc_file)
+            str += "RUBY_PLATFORM: #{RUBY_PLATFORM}\n"
             str
           end
           alias_method :to_s, :inspect

lib/irb/ext/loader.rb

@@ -38,9 +38,9 @@ module IRB # :nodoc:
     else
       separator =
         if File::ALT_SEPARATOR
-          File::SEPARATOR
-        else
           "[#{Regexp.quote(File::SEPARATOR + File::ALT_SEPARATOR)}]"
+        else
+          File::SEPARATOR
         end
       ABSOLUTE_PATH_PATTERN = # :nodoc:
         case Dir.pwd

lib/irb/version.rb

@@ -11,7 +11,7 @@
 #
 
 module IRB # :nodoc:
-  VERSION = "1.3.3"
+  VERSION = "1.3.4"
   @RELEASE_VERSION = VERSION
-  @LAST_UPDATE_DATE = "2021-02-07"
+  @LAST_UPDATE_DATE = "2021-02-25"
 end

lib/irb/workspace.rb

@@ -175,7 +175,7 @@ EOF
       body = (start_pos..end_pos).map do |current_pos|
         sprintf(fmt, pos == current_pos ? '=>' : '', current_pos + 1, lines[current_pos])
       end.join("")
-      "\nFrom: #{file} @ line #{pos + 1} :\n\n#{body}#{Color.clear}\n"
+      "\nFrom: #{file} @ line #{pos + 1} :\n\n#{body}#{Color.clear if use_colorize}\n"
     end
 
     def IRB.delete_caller

lib/reline/line_editor.rb

@@ -124,6 +124,7 @@ class Reline::LineEditor
         @prompt_cache_time = Time.now.to_f
       end
       prompt_list.map!{ prompt } if @vi_arg or @searching_prompt
+      prompt_list = [prompt] if prompt_list.empty?
       mode_string = check_mode_string
       prompt_list = prompt_list.map{ |pr| mode_string + pr } if mode_string
       prompt = prompt_list[@line_index]
@@ -343,8 +344,9 @@ class Reline::LineEditor
     else
     end_of_line_cursor = new_cursor_max
     end
-    line_to_calc.encode(Encoding::UTF_8).grapheme_clusters.each do |gc|
+    line_to_calc.grapheme_clusters.each do |gc|
-      mbchar_width = Reline::Unicode.get_mbchar_width(gc)
+      mbchar = gc.encode(Encoding::UTF_8)
+      mbchar_width = Reline::Unicode.get_mbchar_width(mbchar)
       now = new_cursor + mbchar_width
       if now > end_of_line_cursor or now > cursor
         break
@@ -724,13 +726,17 @@ class Reline::LineEditor
       Reline::IOGate.move_cursor_column(0)
       if line.nil?
         if calculate_width(visual_lines[index - 1], true) == Reline::IOGate.get_screen_size.last
-          # Reaches the end of line.
+          # reaches the end of line
-          #
+          if Reline::IOGate.win? and Reline::IOGate.win_legacy_console?
+            # A newline is automatically inserted if a character is rendered at
+            # eol on command prompt.
+          else
             # When the cursor is at the end of the line and erases characters
             # after the cursor, some terminals delete the character at the
             # cursor position.
             move_cursor_down(1)
             Reline::IOGate.move_cursor_column(0)
+          end
         else
           Reline::IOGate.erase_after_cursor
           move_cursor_down(1)
@@ -739,6 +745,10 @@ class Reline::LineEditor
         next
       end
       @output.write line
+      if Reline::IOGate.win? and Reline::IOGate.win_legacy_console? and calculate_width(line, true) == Reline::IOGate.get_screen_size.last
+        # A newline is automatically inserted if a character is rendered at eol on command prompt.
+        @rest_height -= 1 if @rest_height > 0
+      end
       @output.flush
       if @first_prompt
         @first_prompt = false

lib/reline/unicode.rb

@@ -108,6 +108,7 @@ class Reline::Unicode
     end
     m = mbchar.encode(Encoding::UTF_8).match(MBCharWidthRE)
     case
+    when m.nil? then 1 # TODO should be U+FFFD <20> REPLACEMENT CHARACTER
     when m[:width_2_1], m[:width_2_2] then 2
     when m[:width_3] then 3
     when m[:width_0] then 0

lib/reline/version.rb

@@ -1,3 +1,3 @@
 module Reline
-  VERSION = '0.2.3'
+  VERSION = '0.2.4'
 end

lib/reline/windows.rb

@@ -9,6 +9,10 @@ class Reline::Windows
     true
   end
 
+  def self.win_legacy_console?
+    @@legacy_console
+  end
+
   RAW_KEYSTROKE_CONFIG = {
     [224, 72] => :ed_prev_history, # ↑
     [224, 80] => :ed_next_history, # ↓
@@ -94,6 +98,26 @@ class Reline::Windows
   @@GetFileInformationByHandleEx = Win32API.new('kernel32', 'GetFileInformationByHandleEx', ['L', 'I', 'P', 'L'], 'I')
   @@FillConsoleOutputAttribute = Win32API.new('kernel32', 'FillConsoleOutputAttribute', ['L', 'L', 'L', 'L', 'P'], 'L')
 
+  @@GetConsoleMode = Win32API.new('kernel32', 'GetConsoleMode', ['L', 'P'], 'L')
+  @@SetConsoleMode = Win32API.new('kernel32', 'SetConsoleMode', ['L', 'L'], 'L')
+  ENABLE_VIRTUAL_TERMINAL_PROCESSING = 4
+
+  private_class_method def self.getconsolemode
+    mode = "\000\000\000\000"
+    @@GetConsoleMode.call(@@hConsoleHandle, mode)
+    mode.unpack1('L')
+  end
+
+  private_class_method def self.setconsolemode(mode)
+    @@SetConsoleMode.call(@@hConsoleHandle, mode)
+  end
+
+  @@legacy_console = (getconsolemode() & ENABLE_VIRTUAL_TERMINAL_PROCESSING == 0)
+  #if @@legacy_console
+  #  setconsolemode(getconsolemode() | ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+  #  @@legacy_console = (getconsolemode() & ENABLE_VIRTUAL_TERMINAL_PROCESSING == 0)
+  #end
+
   @@input_buf = []
   @@output_buf = []
 

test/irb/test_cmd.rb

@@ -48,7 +48,8 @@ module TestIRB
         Ruby\sversion: .+\n
         IRB\sversion:\sirb .+\n
         InputMethod:\sReidlineInputMethod\swith\sReline .+ and .+\n
-        \.irbrc\spath: .+
+        \.irbrc\spath: .+\n
+        RUBY_PLATFORM: .+
       }x
       assert_match expected, irb.context.main.irb_info.to_s
     end
@@ -67,7 +68,8 @@ module TestIRB
         Ruby\sversion: .+\n
         IRB\sversion:\sirb .+\n
         InputMethod:\sReadlineInputMethod\swith .+ and .+\n
-        \.irbrc\spath: .+
+        \.irbrc\spath: .+\n
+        RUBY_PLATFORM: .+
       }x
       assert_match expected, irb.context.main.irb_info.to_s
     end
@@ -89,6 +91,7 @@ module TestIRB
         Ruby\sversion: .+\n
         IRB\sversion:\sirb .+\n
         InputMethod:\sReidlineInputMethod\swith\sReline\s[^ ]+(?!\sand\s.+)\n
+        RUBY_PLATFORM: .+\n
         \z
       }x
       assert_match expected, irb.context.main.irb_info.to_s
@@ -115,6 +118,7 @@ module TestIRB
         Ruby\sversion: .+\n
         IRB\sversion:\sirb .+\n
         InputMethod:\sReadlineInputMethod\swith\s(?~.*\sand\s.+)\n
+        RUBY_PLATFORM: .+\n
         \z
       }x
       assert_match expected, irb.context.main.irb_info.to_s

test/irb/test_workspace.rb

@@ -9,6 +9,7 @@ require 'irb/color'
 module TestIRB
   class TestWorkSpace < Test::Unit::TestCase
     def test_code_around_binding
+      IRB.conf[:USE_COLORIZE] = false
       Tempfile.create('irb') do |f|
         code = <<~RUBY
           # 1
@@ -33,6 +34,8 @@ module TestIRB
 
         EOS
       end
+    ensure
+      IRB.conf.delete(:USE_COLORIZE)
     end
 
     def test_code_around_binding_with_existing_unreadable_file
@@ -52,6 +55,7 @@ module TestIRB
     end
 
     def test_code_around_binding_with_script_lines__
+      IRB.conf[:USE_COLORIZE] = false
       with_script_lines do |script_lines|
         Tempfile.create('irb') do |f|
           code = "IRB::WorkSpace.new(binding)\n"
@@ -67,6 +71,8 @@ module TestIRB
           EOS
         end
       end
+    ensure
+      IRB.conf.delete(:USE_COLORIZE)
     end
 
     def test_code_around_binding_on_irb

test/reline/test_key_actor_emacs.rb

@@ -2280,6 +2280,14 @@ class Reline::KeyActor::Emacs::Test < Reline::TestCase
     assert_line('  12345')
   end
 
+  def test_input_unknown_char
+    input_keys('͸') # U+0378 (unassigned)
+    assert_line('͸')
+    assert_byte_pointer_size('͸')
+    assert_cursor(1)
+    assert_cursor_max(1)
+  end
+
 =begin # TODO: move KeyStroke instance from Reline to LineEditor
   def test_key_delete
     input_keys('ab')

test/reline/yamatanooroti/multiline_repl

@@ -0,0 +1,74 @@
+#!/usr/bin/env ruby
+
+require 'reline'
+require 'optparse'
+require_relative 'termination_checker'
+
+opt = OptionParser.new
+opt.on('--prompt-list-cache-timeout VAL') { |v|
+  Reline::LineEditor.__send__(:remove_const, :PROMPT_LIST_CACHE_TIMEOUT)
+  Reline::LineEditor::PROMPT_LIST_CACHE_TIMEOUT = v.to_f
+}
+opt.on('--dynamic-prompt') {
+  Reline.prompt_proc = proc { |lines|
+    lines.each_with_index.map { |l, i|
+      '[%04d]> ' % i
+    }
+  }
+}
+opt.on('--broken-dynamic-prompt') {
+  Reline.prompt_proc = proc { |lines|
+    range = lines.size > 1 ? (0..(lines.size - 2)) : (0..0)
+    lines[range].each_with_index.map { |l, i|
+      '[%04d]> ' % i
+    }
+  }
+}
+opt.on('--dynamic-prompt-returns-empty') {
+  Reline.prompt_proc = proc { |l| [] }
+}
+opt.on('--auto-indent') {
+  AutoIndent.new
+}
+opt.parse!(ARGV)
+
+begin
+  stty_save = `stty -g`.chomp
+rescue
+end
+
+begin
+  prompt = ENV['RELINE_TEST_PROMPT'] || 'prompt> '
+  puts 'Multiline REPL.'
+  checker = TerminationChecker.new
+  while code = Reline.readmultiline(prompt, true) { |code| checker.terminated?(code) }
+    case code.chomp
+    when 'exit', 'quit', 'q'
+      exit 0
+    when ''
+      # NOOP
+    else
+      begin
+        result = eval(code)
+        puts "=> #{result.inspect}"
+      rescue ScriptError, StandardError => e
+        puts "Traceback (most recent call last):"
+        e.backtrace.reverse_each do |f|
+          puts "        #{f}"
+        end
+        puts e.message
+      end
+    end
+  end
+rescue Interrupt
+  puts '^C'
+  `stty #{stty_save}` if stty_save
+  exit 0
+ensure
+  `stty #{stty_save}` if stty_save
+end
+begin
+  puts
+rescue Errno::EIO
+  # Maybe the I/O has been closed.
+end

test/reline/yamatanooroti/termination_checker.rb

@@ -0,0 +1,30 @@
+require 'ripper'
+require 'irb/ruby-lex'
+
+class TerminationChecker < RubyLex
+  def terminated?(code)
+    code.gsub!(/\n*$/, '').concat("\n")
+    @tokens = Ripper.lex(code)
+    continue = process_continue
+    code_block_open = check_code_block(code)
+    indent = process_nesting_level
+    ltype = process_literal_type
+    if code_block_open or ltype or continue or indent > 0
+      false
+    else
+      true
+    end
+  end
+end
+
+class AutoIndent < RubyLex
+  def initialize
+    set_input(self)
+    context = Struct.new(:auto_indent_mode).new(true)
+    set_auto_indent(context)
+  end
+
+  def auto_indent(&block)
+    Reline.auto_indent_proc = block
+  end
+end

test/reline/yamatanooroti/test_rendering.rb

@@ -26,7 +26,7 @@ begin
     end
 
     def test_history_back
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(":a\n")
       write("\C-p")
       close
@@ -39,7 +39,7 @@ begin
     end
 
     def test_backspace
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(":abc\C-h\n")
       close
       assert_screen(<<~EOC)
@@ -51,7 +51,7 @@ begin
     end
 
     def test_autowrap
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write('01234567890123456789012')
       close
       assert_screen(<<~EOC)
@@ -62,7 +62,7 @@ begin
     end
 
     def test_fullwidth
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(":あ\n")
       close
       assert_screen(<<~EOC)
@@ -74,7 +74,7 @@ begin
     end
 
     def test_two_fullwidth
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(":あい\n")
       close
       assert_screen(<<~EOC)
@@ -86,7 +86,7 @@ begin
     end
 
     def test_finish_autowrapped_line
-      start_terminal(10, 40, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(10, 40, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("[{'user'=>{'email'=>'a@a', 'id'=>'ABC'}, 'version'=>4, 'status'=>'succeeded'}]\n")
       close
       assert_screen(<<~EOC)
@@ -102,7 +102,7 @@ begin
     end
 
     def test_finish_autowrapped_line_in_the_middle_of_lines
-      start_terminal(20, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(20, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("[{'user'=>{'email'=>'abcdef@abcdef', 'id'=>'ABC'}, 'version'=>4, 'status'=>'succeeded'}]#{"\C-b"*7}")
       write("\n")
       close
@@ -121,7 +121,7 @@ begin
     end
 
     def test_finish_autowrapped_line_in_the_middle_of_multilines
-      start_terminal(30, 16, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(30, 16, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("<<~EOM\n  ABCDEFG\nEOM\n")
       close
       assert_screen(<<~'EOC')
@@ -139,7 +139,7 @@ begin
       write_inputrc <<~'LINES'
         "abc": "123"
       LINES
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("abc\n")
       close
       assert_screen(<<~EOC)
@@ -154,7 +154,7 @@ begin
       write_inputrc <<~LINES
         set show-mode-in-prompt on
       LINES
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       close
       assert_screen(<<~EOC)
         Multiline REPL.
@@ -167,7 +167,7 @@ begin
         set editing-mode vi
         set show-mode-in-prompt on
       LINES
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(":a\n\C-[k")
       close
       assert_screen(<<~EOC)
@@ -183,7 +183,7 @@ begin
         set show-mode-in-prompt on
         set emacs-mode-string [emacs]
       LINES
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       close
       assert_screen(<<~EOC)
         Multiline REPL.
@@ -196,7 +196,7 @@ begin
         set show-mode-in-prompt on
         set emacs-mode-string "[emacs]"
       LINES
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       close
       assert_screen(<<~EOC)
         Multiline REPL.
@@ -211,7 +211,7 @@ begin
         set vi-ins-mode-string "{InS}"
         set vi-cmd-mode-string "{CmD}"
       LINES
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(":a\n\C-[k")
       close
       assert_screen(<<~EOC)
@@ -227,7 +227,7 @@ begin
         set editing-mode vi
         set show-mode-in-prompt on
       LINES
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(":a\C-[ab\C-[ac\C-h\C-h\C-h\C-h:a")
       close
       assert_screen(<<~EOC)
@@ -238,7 +238,7 @@ begin
 
     def test_prompt_with_escape_sequence
       ENV['RELINE_TEST_PROMPT'] = "\1\e[30m\2prompt> \1\e[m\2"
-      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("123\n")
       close
       assert_screen(<<~EOC)
@@ -251,7 +251,7 @@ begin
 
     def test_prompt_with_escape_sequence_and_autowrap
       ENV['RELINE_TEST_PROMPT'] = "\1\e[30m\2prompt> \1\e[m\2"
-      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("1234567890123\n")
       close
       assert_screen(<<~EOC)
@@ -264,7 +264,7 @@ begin
     end
 
     def test_multiline_and_autowrap
-      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def aaaaaaaaaa\n  33333333\n           end\C-a\C-pputs\C-e\e\C-m888888888888888")
       close
       assert_screen(<<~EOC)
@@ -281,7 +281,7 @@ begin
     end
 
     def test_clear
-      start_terminal(10, 15, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(10, 15, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("3\C-l")
       close
       assert_screen(<<~EOC)
@@ -291,7 +291,7 @@ begin
 
     def test_clear_multiline_and_autowrap
       omit # FIXME clear logic is buggy
-      start_terminal(10, 15, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(10, 15, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def aaaaaa\n  3\n\C-lend")
       close
       assert_screen(<<~EOC)
@@ -303,7 +303,7 @@ begin
     end
 
     def test_nearest_cursor
-      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def ああ\n  :いい\nend\C-pbb\C-pcc")
       close
       assert_screen(<<~EOC)
@@ -315,7 +315,7 @@ begin
     end
 
     def test_delete_line
-      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def a\n\nend\C-p\C-h")
       close
       assert_screen(<<~EOC)
@@ -326,7 +326,7 @@ begin
     end
 
     def test_last_line_of_screen
-      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("\n\n\n\n\ndef a\nend")
       close
       assert_screen(<<~EOC)
@@ -340,7 +340,7 @@ begin
 
     # c17a09b7454352e2aff5a7d8722e80afb73e454b
     def test_autowrap_at_last_line_of_screen
-      start_terminal(5, 15, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 15, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def a\nend\n\C-p")
       close
       assert_screen(<<~EOC)
@@ -354,7 +354,7 @@ begin
 
     # f002483b27cdb325c5edf9e0fe4fa4e1c71c4b0e
     def test_insert_line_in_the_middle_of_line
-      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("333\C-b\C-b\e\C-m8")
       close
       assert_screen(<<~EOC)
@@ -366,7 +366,7 @@ begin
 
     # 9d8978961c5de5064f949d56d7e0286df9e18f43
     def test_insert_line_in_the_middle_of_line_at_last_line_of_screen
-      start_terminal(3, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(3, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("333333333333333\C-a\C-f\e\C-m")
       close
       assert_screen(<<~EOC)
@@ -377,7 +377,7 @@ begin
     end
 
     def test_insert_after_clear
-      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def a\n  01234\nend\C-l\C-p5678")
       close
       assert_screen(<<~EOC)
@@ -388,7 +388,7 @@ begin
     end
 
     def test_foced_newline_insertion
-      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(10, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       #write("def a\nend\C-p\C-e\e\C-m  3")
       write("def a\nend\C-p\C-e\e\x0D")
       close
@@ -401,7 +401,7 @@ begin
     end
 
     def test_multiline_incremental_search
-      start_terminal(6, 25, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(6, 25, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def a\n  8\nend\ndef b\n  3\nend\C-s8")
       close
       assert_screen(<<~EOC)
@@ -412,7 +412,7 @@ begin
     end
 
     def test_multiline_incremental_search_finish
-      start_terminal(6, 25, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(6, 25, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def a\n  8\nend\ndef b\n  3\nend\C-r8\C-j")
       close
       assert_screen(<<~EOC)
@@ -427,7 +427,7 @@ begin
         set editing-mode vi
         "\\C-j": vi-movement-mode
       LINES
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(":1234\C-jhhhi0")
       close
       assert_screen(<<~EOC)
@@ -437,7 +437,7 @@ begin
     end
 
     def test_prompt_list_caching
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl --prompt-list-cache-timeout 10 --dynamic-prompt}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl --prompt-list-cache-timeout 10 --dynamic-prompt}, startup_message: 'Multiline REPL.')
       write("def hoge\n  3\nend")
       close
       assert_screen(<<~EOC)
@@ -449,7 +449,7 @@ begin
     end
 
     def test_broken_prompt_list
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl --broken-dynamic-prompt}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl --broken-dynamic-prompt}, startup_message: 'Multiline REPL.')
       write("def hoge\n  3\nend")
       close
       assert_screen(<<~EOC)
@@ -465,7 +465,7 @@ begin
       write_inputrc <<~LINES
         set enable-bracketed-paste on
       LINES
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("\e[200~,")
       write("def hoge\n  3\nend")
       write("\e[200~.")
@@ -479,7 +479,7 @@ begin
     end
 
     def test_backspace_until_returns_to_initial
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("ABC")
       write("\C-h\C-h\C-h")
       close
@@ -490,7 +490,7 @@ begin
     end
 
     def test_longer_than_screen_height
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(<<~EOC.chomp)
         def each_top_level_statement
           initialize_input
@@ -537,7 +537,7 @@ begin
     end
 
     def test_longer_than_screen_height_with_scroll_back
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(<<~EOC.chomp)
         def each_top_level_statement
           initialize_input
@@ -585,7 +585,7 @@ begin
     end
 
     def test_longer_than_screen_height_with_complex_scroll_back
-      start_terminal(4, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(4, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write(<<~EOC.chomp)
         def each_top_level_statement
           initialize_input
@@ -633,7 +633,7 @@ begin
     end
 
     def test_update_cursor_correctly_when_just_cursor_moving
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def hoge\n  01234678")
       write("\C-p")
       write("\C-b")
@@ -650,7 +650,7 @@ begin
     end
 
     def test_suppress_auto_indent_just_after_pasted
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl --auto-indent}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl --auto-indent}, startup_message: 'Multiline REPL.')
       write("def hoge\n  [[\n      3]]\ned")
       write("\C-bn")
       close
@@ -664,7 +664,7 @@ begin
     end
 
     def test_suppress_auto_indent_for_adding_newlines_in_pasting
-      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl --auto-indent}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl --auto-indent}, startup_message: 'Multiline REPL.')
       write("<<~Q\n")
       write("{\n  #\n}")
       write("#")
@@ -679,7 +679,7 @@ begin
     end
 
     def test_autowrap_in_the_middle_of_a_line
-      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def abcdefg; end\C-b\C-b\C-b\C-b\C-b")
       %w{h i}.each do |c|
         write(c)
@@ -693,7 +693,7 @@ begin
     end
 
     def test_terminate_in_the_middle_of_lines
-      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/bin/multiline_repl}, startup_message: 'Multiline REPL.')
+      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
       write("def hoge\n  1\n  2\n  3\n  4\nend\n")
       write("\C-p\C-p\C-p\C-e\n")
       close
@@ -706,6 +706,19 @@ begin
       EOC
     end
 
+    def test_dynamic_prompt_returns_empty
+      start_terminal(5, 20, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl --dynamic-prompt-returns-empty}, startup_message: 'Multiline REPL.')
+      write("def hoge\nend\n")
+      close
+      assert_screen(<<~EOC)
+        Multiline REPL.
+        prompt> def hoge
+        prompt> end
+        => :hoge
+        prompt>
+      EOC
+    end
+
     private def write_inputrc(content)
       File.open(@inputrc_file, 'w') do |f|
         f.write content