files-to-excludes

#!/usr/bin/env perl
# This script takes an input of filenames and outputs a set of
# include/exclude directives that can be used by rsync to copy
# just the indicated files using an --exclude-from=FILE option.
use strict;

my %hash;

while (<>) {
    chomp;
    s#^/+##;
    my $path = '/';
    while (m#([^/]+/)/*#g) {
	$path .= $1;
	print "+ $path\n" unless $hash{$path}++;
    }
    if (m#([^/]+)$#) {
	print "+ $path$1\n";
    } else {
	delete $hash{$path};
    }
}

foreach (sort keys %hash) {
    print "- $_*\n";
}
print "- /*\n";