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# save-history.rb -
# $Release Version: 0.9.6$
# $Revision: 47266 $
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#
require "readline"
module IRB
module HistorySavingAbility # :nodoc:
end
class Context
def init_save_history# :nodoc:
unless (class<<@io;self;end).include?(HistorySavingAbility)
@io.extend(HistorySavingAbility)
end
end
# A copy of the default <code>IRB.conf[:SAVE_HISTORY]</code>
def save_history
IRB.conf[:SAVE_HISTORY]
end
# Sets <code>IRB.conf[:SAVE_HISTORY]</code> to the given +val+ and calls
# #init_save_history with this context.
#
# Will store the number of +val+ entries of history in the #history_file
#
# Add the following to your +.irbrc+ to change the number of history
# entries stored to 1000:
#
# IRB.conf[:SAVE_HISTORY] = 1000
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
# A copy of the default <code>IRB.conf[:HISTORY_FILE]</code>
def history_file
IRB.conf[:HISTORY_FILE]
end
# Set <code>IRB.conf[:HISTORY_FILE]</code> to the given +hist+.
def history_file=(hist)
IRB.conf[:HISTORY_FILE] = hist
end
end
module HistorySavingAbility # :nodoc:
include Readline
def HistorySavingAbility.extended(obj)
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
# Change the permission of a file that already exists[BUG #7694]
begin
if File.stat(history_file).mode & 066 != 0
File.chmod(0600, history_file)
end
rescue Errno::ENOENT
rescue
raise
end
open(history_file, 'w', 0600 ) do |f|
hist = HISTORY.to_a
f.puts(hist[-num..-1] || hist)
end
end
end
end
end
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