#!/usr/bin/perl
use strict qw(vars);
use Digest::SHA1;

open(G, "find gems -name \*.gem|") || die;
open(R, "<RubyOnRails.plist") || die;

my %gems;
while(<G>) {
	chomp;
	die "?" unless m{/([^/]*)\.gem};
	$gems{$1} = $_;
}
close(G) || die;

my($proj, $ver, $sha1);

sub sha_file {
	my($f) = @_;

	open(SHA, "<$f") || die "can't open $f";
	my $d = Digest::SHA1->new;
	$d->addfile(*SHA);
	close(SHA);

	return $d->hexdigest;
}

sub process {
	my($p, $v, $s) = @_;

	#print "$p $v $s\n";
	my $k = "$p-$v";
	if ($gems{$k}) {
		my $sf = sha_file($gems{$k});
		if ($sf ne $s) {
			warn "Wrong digest for $k ($sf != $s)";
		}
		delete($gems{$k});
	} else {
		warn "No $k found (or >1 plist entry)"
	}
}

while(<R>) {
	chomp;
	if (m{<key>(.*)</key>}) {
		my $k = $1;
		my $v;
		my $_ = <R>;
		if (m{<array>}) {
			next;
		}
		if (m{<string>(.*)</string>}) {
			$v = $1;
		} else {
			die "Unexpected value for $k: $_";
		}

		if ($k eq "OpenSourceProject") {
			&process($proj, $ver, $sha1) if (defined($proj));
			$proj = $v;
			undef $ver;
			undef $sha1;
		} elsif ($k eq "OpenSourceSHA1") {
			warn "extra def for sha1" if (defined($sha1));
			$sha1 = $v;
		} elsif ($k eq "OpenSourceVersion") {
			warn "extra def for OpenSourceVersion" if (defined($ver));
			$ver = $v;
		}
	}
}

&process($proj, $ver, $sha1) if (defined($proj));
foreach my $k (keys(%gems)) {
	warn "No plist entry for $k\n";
}