Module: IOTail

Included in:
IO, StringIO
Defined in:
lib/io_tail.rb

Overview

IOTail provides a tail_lines method as a mixin. By default it is included into IO and StringIO, if present. If you require StringIO after IOTail, then simply open StringIO and include IOTail.

Instance Method Summary collapse

Instance Method Details

#tail_lines(&block) ⇒ Object

Jumps to near the end of the IO, then yields each line, waiting for new lines if it reaches eof?



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# File 'lib/io_tail.rb', line 12

def tail_lines(&block) # :yields: line
  self.seek(-1, IO::SEEK_END)
  self.gets

  loop do
    self.each_line(&block)

    if self.eof? then
      sleep 0.25
      self.pos = self.pos # reset eof?
    end
  end
end