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Dir : ~/opt/alt/ruby19/lib64/ruby/1.9.1/irb/ext/

View File Name : save-history.rb

#   save-history.rb -
#   	$Release Version: 0.9.6$
#   	$Revision: 25189 $
#   	by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#

require "readline"

module IRB
  module HistorySavingAbility
    @RCS_ID='-$Id: save-history.rb 25189 2009-10-02 12:04:37Z akr $-'
  end

  class Context
    def init_save_history
      unless (class<<@io;self;end).include?(HistorySavingAbility)
	@io.extend(HistorySavingAbility)
      end
    end

    def save_history
      IRB.conf[:SAVE_HISTORY]
    end

    def save_history=(val)
      IRB.conf[:SAVE_HISTORY] = val
      if val
	main_context = IRB.conf[:MAIN_CONTEXT]
	main_context = self unless main_context
	main_context.init_save_history
      end
    end

    def history_file
      IRB.conf[:HISTORY_FILE]
    end

    def history_file=(hist)
      IRB.conf[:HISTORY_FILE] = hist
    end
  end

  module HistorySavingAbility
    include Readline

#     def HistorySavingAbility.create_finalizer
#       proc do
# 	if num = IRB.conf[:SAVE_HISTORY] and (num = num.to_i) > 0
# 	  if hf = IRB.conf[:HISTORY_FILE]
# 	    file = File.expand_path(hf)
# 	  end
# 	  file = IRB.rc_file("_history") unless file
# 	  open(file, 'w' ) do |f|
# 	    hist = HISTORY.to_a
# 	    f.puts(hist[-num..-1] || hist)
# 	  end
# 	end
#       end
#     end

    def HistorySavingAbility.extended(obj)
#      ObjectSpace.define_finalizer(obj, HistorySavingAbility.create_finalizer)
      IRB.conf[:AT_EXIT].push proc{obj.save_history}
      obj.load_history
      obj
    end

    def load_history
      if history_file = IRB.conf[:HISTORY_FILE]
	history_file = File.expand_path(history_file)
      end
      history_file = IRB.rc_file("_history") unless history_file
      if File.exist?(history_file)
	open(history_file) do |f|
	  f.each {|l| HISTORY << l.chomp}
	end
      end
    end

    def save_history
      if num = IRB.conf[:SAVE_HISTORY] and (num = num.to_i) > 0
	if history_file = IRB.conf[:HISTORY_FILE]
	  history_file = File.expand_path(history_file)
	end
	history_file = IRB.rc_file("_history") unless history_file
	open(history_file, 'w' ) do |f|
	  hist = HISTORY.to_a
	  f.puts(hist[-num..-1] || hist)
	end
      end
    end
  end
end