`-- added
    |-- add.txt
    `-- added1
        |--action
        |   |-- action.txt
        |   `-- rev1
        |   |    `-- rev1.html
        |   `-- rev2
        |       `-- rev1.html

        `-- add.html

##</code><code>##


    `-- added
    |-- add.txt
    `-- added1
        |--action
        |   |-- action.txt
        |   `-- rev2
        |       `-- rev1.html

        `-- add.html

##</code><code>##

my $location = $output_dir;
print $location;
open LOGFILE, $location;
my $first_line = 1;
#print $first_line;
my $max_id;
while (<LOGFILE>) {
    if (/rev_(\d)+/) {
        if ($first_line) {
            $first_line = 0;
            $max_id = $1;
            
        } else {
            $max_id = $1 if ($1 > $max_id);
            print $max_id;
        }
    }
}