loggers_thread (IrcLogModule)

    # File lib/rbot/core/irclog.rb, line 244
      def loggers_thread
        ls = nil
        debug 'loggers_thread starting'
        while ls = @queue.pop
          message, where = ls
          message = message.chomp
          now = Time.now
          stamp = now.strftime("%Y/%m/%d %H:%M:%S")
          if where.class <= Server
            where_str = "server"
          else
            where_str = where.downcase.gsub(/[:!?$*()\/\\<>|"']/, "_")
          end
          return unless can_log_on(where_str)

          # close the previous logfile if we're rotating
          if @logs.has_key? where_str
            fp = logfilepath(where_str, now)
            logfile_close(where_str, 'log rotation') if fp != @logs[where_str][1].path
          end

          # (re)open the logfile if necessary
          unless @logs.has_key? where_str
            if @logs.size > @bot.config['irclog.max_open_files']
              @logs.keys.sort do |a, b|
                @logs[a][0] <=> @logs[b][0]
              end.slice(0, @logs.size - @bot.config['irclog.max_open_files']).each do |w|
                logfile_close w, "idle since #{@logs[w][0]}"
              end
            end
            fp = logfilepath(where_str, now)
            begin
              dir = File.dirname(fp)
              # first of all, we check we're not trying to build a directory structure
              # where one of the components exists already as a file, so we
              # backtrack along dir until we come across the topmost existing name.
              # If it's a file, we rename to filename.old.filedate
              up = dir.dup
              until File.exist? up
                up.replace File.dirname up
              end
              unless File.directory? up
                backup = up.dup
                backup << ".old." << File.atime(up).strftime('%Y%m%d%H%M%S')
                debug "#{up} is not a directory! renaming to #{backup}"
                File.rename(up, backup)
              end
              FileUtils.mkdir_p(dir)
              # conversely, it may happen that fp exists and is a directory, in
              # which case we rename the directory instead
              if File.directory? fp
                backup = fp.dup
                backup << ".old." << File.atime(fp).strftime('%Y%m%d%H%M%S')
                debug "#{fp} is not a file! renaming to #{backup}"
                File.rename(fp, backup)
              end
              # it should be fine to create the file now
              f = File.new(fp, "a")
              f.sync = true
              f.puts "[#{stamp}] @ Log started by #{@bot.myself.nick}"
            rescue Exception => e
              error e
              next
            end
            @logs[where_str] = [now, f]
          end
          @logs[where_str][1].puts "[#{stamp}] #{message}"
          @logs[where_str][0] = now
          #debug "[#{stamp}] <#{where}> #{message}"
        end
        @logs.keys.each { |w| logfile_close(w, 'rescan or shutdown') }
        debug 'loggers_thread terminating'
      end