#!/usr/bin/perl
use warnings;
use strict;

use File::Find::Rule;

#find all html files in specified directory
my $dir = "/var/www/site/htdocs/";
my $rule = File::Find::Rule->file->name("*.html")->start( $dir ); 

#keep track of the changed files in a file 
open(OUTFILE,">>fixed_files.txt") || die "cant open fixed_files.txt, $!\n";

while ( my $html_file = $rule->match ) {
 	
   	rename($html_file, "$html_file.bak")    or die;
   	open(my $fh_in,  '<', "$html_file.bak") or die;
   	open(my $fh_out, '>', $html_file)       or die;
	
	while (<$fh_in>) {
			#add the urchin code
			if (s|</head>|<script src="http://mysite.org/__utm.js" type="text/javascript"></script>\n</head>|i) {
				print OUTFILE "$html_file: fixed Urchin code\n";
			}
		print $fh_out $_;
	}

	close($fh_in);
	close($fh_out);
}	

close OUTFILE;