From: Carlos Camargo <camargo.cr@...>
Date: 2011-07-23T03:42:30+09:00
Subject: Regexp inconsistency

I observed a inconsistent behavior between ruby (ruby 1.8.6 (2009-06-08
patchlevel 369) [x86_64-linux]), running in my host, and ruby in
www.rubular.com (reports "Rubular runs on Ruby 1.8.7."). The expression:
/ (\w+(\-\w+)?) \. (log|txt) [\.\-]? (\d{1}) ( \. (gz|bz2))? /x
in my host returns (among others):
net-snmpd.log-20110629.bz2

In rubular site, recognize (correctly, I suppose!) just until:
net-snmpd.log-2 (stop here, i.e. don't recognize the string).

Thanks for any help! (Upgrade ruby to 1.9 isn't an option!)
Camargo

NB: My code (just for test) is:
#! /usr/bin/ruby -w

require 'find'

re_logdir = Regexp.new(/\/log$|\/log\/|\/logs$|\/logs\//)
dias = 5

###
a='(\w+(\-\w+)?)'
d='(\d{4}[\.\-]?\d{2}[\.\-]?\d{2})'
h='(\d{2}[\.\-]?\d{2}[\.\-]?\d{2,6})'
l='(log|txt)'
z='(gz|bz2)'
n1='(\d{1})'
s='[\.\-]'

re_logfile = Regexp.new(/ #{a} \. #{l} #{s}? #{n1} ( \. #{z})? /x )
p re_logfile

Find.find('/') do |f|
  if File.file?(f) and
     re_logdir.match( File.dirname(f) ) and
     re_logfile.match( File.basename(f) )
     p f
  end
end

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