irb-historyを導入したらエラー発生
公開日：
:
Ruby
irb-historyのインストールは以下のようにしました。
# sudo gem install irb-history
インストールされたバージョンについてはこんな感じ。
Macintosh% gem list --local | grep history
irb-history (1.0.0)
Persistent, shared IRB Readline history
irb-history-serberは以下のようにして起動しました。
# irb-history-server -d
.irbrcに以下の記述を追加
require 'rubygems'
require 'irb/history'
IRB::History.start_client
irbを実行してみると、以下のようなエラーが発生。
irb(main):001:0> 123
/Library/Ruby/Gems/1.8/gems/irb-history-1.0.0/lib/irb/history/client.rb:23:in `[]': invalid index (IndexError)
from /Library/Ruby/Gems/1.8/gems/irb-history-1.0.0/lib/irb/history/client.rb:23:in `gets'
from /Library/Ruby/Gems/1.8/gems/irb-history-1.0.0/lib/irb/history/base.rb:23:in `returning'
from /Library/Ruby/Gems/1.8/gems/irb-history-1.0.0/lib/irb/history/client.rb:22:in `gets'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/irb.rb:132:in `eval_input'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/irb.rb:259:in `signal_status'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/irb.rb:131:in `eval_input'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/irb/ruby-lex.rb:189:in `call'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/irb/ruby-lex.rb:189:in `buf_input'
... 11 levels...
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/irb.rb:70:in `start'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/irb.rb:69:in `catch'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/irb.rb:69:in `start'
from /usr/bin/irb:13
Macintosh%
client.rbを覗いてみる。
1 require File.join(File.dirname(__FILE__), 'base')
2
3 module IRB #:nodoc:
4 module History
5 # Reconfigures a running IRB session to use the given remote history
6 # service specified by +uri+, initially retrieving +lines_to_recall+
7 # lines of history.
8 #
9 # Note: This method overrides +gets+ in IRB::ReadlineInputMethod; it
10 # can't be "stopped," and you shouldn't call it more than once.
11 #
12 def self.start_client(uri = DEFAULT_URI, lines_to_recall = 100)
13 require 'drb'
14
15 DRb.start_service
16 history = DRbObject.new nil, uri
17
18 IRB::ReadlineInputMethod.instance_eval do
19 alias_method :old_gets, :gets
20
21 define_method :gets do
22 returning old_gets do
23 line = Readline::HISTORY[-1]
24 history.remember line unless @eof rescue nil
25 end
26 end
27 end
28
29 Readline::HISTORY.push *history.recall(lines_to_recall)
30
31 at_exit {history.unsubscribe_from Readline::HISTORY} if
32 history.subscribe_to Readline::HISTORY
33 rescue
34 end
35 end
36 end%
うーん、何でだろう?
