support/cvs2includes

#!/usr/bin/perl
#
# This script finds all CVS/Entries files in the current directory and below
# and creates a local .cvsinclude file with non-inherited rules including each
# checked-in file.  Then, use this option whenever using --cvs-exclude (-C):
#
# 	-f ': .cvsinclude'
#
# That ensures that all checked-in files/dirs are included in the transfer.
# (You could alternately put ": .cvsinclude" into an .rsync-filter file and
# use the -F option, which is easier to type.)
#
# The downside is that you need to remember to re-run cvs2includes whenever
# You add a new file to the project.
use strict;

open(FIND, 'find . -name CVS -type d |') or die $!;
while (<FIND>) {
    chomp;
    s#^\./##;

    my $entries = "$_/Entries";
    s/CVS$/.cvsinclude/;
    my $filter = $_;

    open(ENTRIES, $entries) or die "Unable to open $entries: $!\n";
    my @includes;
    while (<ENTRIES>) {
	push(@includes, $1) if m#/(.+?)/#;
    }
    close ENTRIES;
    if (@includes) {
	open(FILTER, ">$filter") or die "Unable to write $filter: $!\n";
	print FILTER '+ /', join("\n+ /", @includes), "\n";
	close FILTER;
	print "Updated $filter\n";
    } elsif (-f $filter) {
	unlink($filter);
	print "Removed $filter\n";
    }
}
close FIND;