* tool/redmine-backporter.rb: added history feature for platforms which

lack readline.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49420 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Jan 27 15:58:23 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* tool/redmine-backporter.rb: added history feature for platforms which
+	  lack readline.
+
 Mon Jan 26 22:09:35 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* .gitignore: ignored temporary file with git.

tool/redmine-backporter.rb

@@ -200,7 +200,8 @@ def more(sio)
   end
 end
 
-def Readline.readline(prompt = '')
+class << Readline
+  def readline(prompt = '')
     console = IO.console
     console.binmode
     ly, lx = console.winsize
@@ -217,6 +218,7 @@ def Readline.readline(prompt = '')
       case c = console.getch
       when "\r", "\n"
         puts
+        HISTORY << line
         return line
       when "\C-?", "\b" # DEL/BS
         print "\b \b" if line.chop!
@@ -226,11 +228,48 @@ def Readline.readline(prompt = '')
       when "\C-d"
         return nil if line.empty?
         line << c
+      when "\C-p"
+        HISTORY.pos -= 1
+        line = HISTORY.current
+        print cls
+        print line
+      when "\C-n"
+        HISTORY.pos += 1
+        line = HISTORY.current
+        print cls
+        print line
       else
         print c
         line << c
       end
     end
+  end
+
+  HISTORY = []
+  def HISTORY.<<(val)
+    HISTORY.push(val)
+    @pos = self.size
+    self
+  end
+  def HISTORY.pos
+    @pos ||= 0
+  end
+  def HISTORY.pos=(val)
+    @pos = val
+    if @pos < 0
+      @pos = -1
+    elsif @pos >= self.size
+      @pos = self.size
+    end
+  end
+  def HISTORY.current
+    @pos ||= 0
+    if @pos < 0 || @pos >= self.size
+      ''
+    else
+      self[@pos]
+    end
+  end
 end unless defined?(Readline.readline)
 
 def mergeinfo