Transform Papertrail logfiles into Oink-readable Hodel 3000 compliant ones

hodeldiplom.rb

require 'date'

logfile = ARGV.first

if logfile.nil? || !File.exists?(logfile)
  puts 'No logfile given!'
  exit!
end

IO.foreach(logfile).each do |line|
  # papertrail archived log columns
  id, generated_at, received_at, source_id, source_name, source_ip, facility_name, severity_name, program, message = line.split "\t"

  next unless message =~ /Oink|Memory|Instantiation/

  program.match(/app\/web\.(?<app_id>\d+)/) do |match|
    next unless match

    generated_at = DateTime.parse generated_at

    # Jun 23 15:11:25 claptrap rails[21102]: Oink Log Entry Complete
    date_time = generated_at.strftime '%b %d %T' 
    hodel_3000_compliant_line = "#{date_time} #{source_name} rails[#{match[:app_id]}]: #{message}"
    puts hodel_3000_compliant_line
  end
end