Finding the bad parts in a log file

This little script makes things easier by extracting the errors out of a rails log file

#!/usr/bin/env ruby

text = ''
completed = false
total = 0
good = 0

ARGF.each do |l|
 if l =~ /^Processing /
  puts text if completed == false and text.size > 0
  text = ''
  completed = false
  total += 1
 elsif l =~ /^Completed /
  completed = true
  good += 1
 end
 text << l
end

puts text if completed == false and text.size > 0

$stderr.puts "Read #{total} transactions, #{total - good} were errors"

To use it you do this: striplog.rb development.log > development.log.errors. It will print out a summary line at the end to show you how many errors it found