Watch/read a growing log file

Question

I have a log file that is constantly growing. How can I watch and parse it via a Ruby script?

The script will parse each new line as it is written to the file and ou

Answer 1

Poor man's approach for quick stuff:

1. a Ruby script that does

   ARGF.each do |line|
     ...
   

2. Running screen with:

   tail -f file | ruby script