When using Perl's File::Find what's a quick & easy way to limit search depth?

Question

I want to be able to limit Perl's File::Find to a directory depth (below the specified search) to the specified directory and 1 & 2 subdirectories beneath it.

I want to be able to enumerate the files at the same time, if this is possible.

It must work with absolute paths.

Answer 1

This perlmonks node explains how to implement mindepth and maxdepth from GNU's find.

Basically, they count the number of slashes in a directory, and use that to determine the depth. The preprocess function will then only return the values where the depth is smaller than the max_depth.

my ($min_depth, $max_depth) = (2,3);

find( {
    preprocess => \&preprocess,
    wanted => \&wanted,
}, @dirs);

sub preprocess {
    my $depth = $File::Find::dir =~ tr[/][];
    return @_ if $depth < $max_depth;
    return grep { not -d } @_ if $depth == $max_depth;
    return;
}

sub wanted {
    my $depth = $File::Find::dir =~ tr[/][];
    return if $depth < $min_depth;
    print;
}

Tailored to your case:

use File::Find;
my $max_depth = 2;

find( {
    preprocess => \&preprocess,
    wanted => \&wanted,
}, '.');

sub preprocess {
    my $depth = $File::Find::dir =~ tr[/][];
    return @_ if $depth < $max_depth;
    return grep { not -d } @_ if $depth == $max_depth;
    return;
}

sub wanted {
    print $_ . "\n" if -f; #Only files
}