Running Grok pattern on log files in some directory

grokDir.rb

#!/usr/bin/env ruby
###############################################
#
# grokDir.rb
#
# Version 0.1
#
# > ruby grokDir.rb -d "c:/Logs/**/*.log" -p "%{DATESTAMP:timestamp}"
#
###############################################

require "rubygems"
require "grok-pure"
require "pp"
require "optparse"

# default banner
banner = "Usage: #{$0} [-d DIR] [-p PATTERN]"

# IIS pattern
pattern = "%{DATESTAMP:eventtime} %{WORD:site} %{IPORHOST:hostip} %{WORD:method} %{URIPATH:request} (?:%{DATA:param}|-) %{NUMBER:port} (?:%{USER:username}|(%{WORD:domain}\\%{USER:username})|-) %{IPORHOST:clientip}(?: %{DATA:agent}|-) %{NUMBER:response} %{NUMBER:status} %{NUMBER:win32Status}"

options = {}

opts = ARGV.options do |opts|
	opts.banner = banner
	
	opts.on("-d", "--directory DIR", "Logfile directory") do |d| 
		options[:dir] = d
	end
	
	opts.on("-p", "--pattern PATTERN", "Grok pattern") do |p|
		options[:pattern] = p
	end
end

begin
if ARGV.empty?
	puts opts
	exit
end
opts.parse!(ARGV)
rescue Exception => e
	puts e, "", opts
	exit
end

grok = Grok.new
grok.add_patterns_from_file("./patterns/grok-patterns")
grok.compile(options[:pattern] ? options[:pattern] : pattern)

Dir.glob(options[:dir]) do |path|
	next if path == '.' or path == '..'
	File.open(path).each_line do |line|
		match = grok.match(line)
		if match
			puts "Resulting capture:"
			pp match.captures
		end
	end
end