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# frozen_string_literal: false
#
# save-history.rb -
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
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
remove_method(:save_history=) if method_defined?(:save_history=)
# 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:
def HistorySavingAbility.extended(obj)
IRB.conf[:AT_EXIT].push proc{obj.save_history}
obj.load_history
obj
end
def load_history
return unless self.class.const_defined?(:HISTORY)
history = self.class::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)
File.open(history_file, "r:#{IRB.conf[:LC_MESSAGES].encoding}") do |f|
f.each { |l|
l = l.chomp
if self.class == RelineInputMethod and history.last&.end_with?("\\")
history.last.delete_suffix!("\\")
history.last << "\n" << l
else
history << l
end
}
end
@loaded_history_lines = history.size
@loaded_history_mtime = File.mtime(history_file)
end
end
def save_history
return unless self.class.const_defined?(:HISTORY)
history = self.class::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 Errno::EPERM
return
rescue
raise
end
if File.exist?(history_file) &&
File.mtime(history_file) != @loaded_history_mtime
history = history[@loaded_history_lines..-1] if @loaded_history_lines
append_history = true
end
File.open(history_file, (append_history ? 'a' : 'w'), 0o600, encoding: IRB.conf[:LC_MESSAGES]&.encoding) do |f|
hist = history.map{ |l| l.split("\n").join("\\\n") }
unless append_history
begin
hist = hist.last(num) if hist.size > num and num > 0
rescue RangeError # bignum too big to convert into `long'
# Do nothing because the bignum should be treated as inifinity
end
end
f.puts(hist)
end
end
end
end
end
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