#!/usr/bin/perl

# $OpenBSD: find-all-conflicts,v 1.11 2005/12/12 13:37:21 espie Exp $
# Copyright (c) 2000-2005
# Marc Espie.  All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Neither the name of OpenBSD nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY ITS AUTHOR AND THE OpenBSD project ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

# check all packages in the current directory, and report conflicts which
# are not apparent in @pkgcfl.

use strict;

use File::Spec;
use File::Path;
use OpenBSD::PackageLocator;
use OpenBSD::PackageInfo;
use OpenBSD::PackingList;
use OpenBSD::Getopt;
use OpenBSD::Error;
use OpenBSD::PkgCfl;

package OpenBSD::PackingElement;
sub register
{
}

package OpenBSD::PackingElement::FileBase;

sub register 
{
	my ($self, $all_conflict, $all_deps, $pkgname) = @_;

	my $file= File::Spec->canonpath($self->fullname());
	unless (defined $all_conflict->{$file}) {
		$all_conflict->{$file} = [];
	}
	push @{$all_conflict->{$file}}, $pkgname;
}

package OpenBSD::PackingElement::Depend;
sub register 
{
	my ($self, $all_conflict, $all_deps, $pkgname) = @_;
	if (defined $self->{def}) {
		unless (defined $all_deps->{$pkgname}) {
			$all_deps->{$pkgname} = [];
		}
		push @{$all_deps->{$pkgname}}, $self->{def};
	}
}


package main;

my $cache = {};
my $cache2 = {};

sub find_a_conflict
{
	my ($conflicts, $deps, $pkg, $pkg2) = @_;
	return 0 if $pkg eq $pkg2;
	
	if (defined $conflicts->{$pkg} && $conflicts->{$pkg}->conflicts_with($pkg2)) {
		return 1;
	}
	if (defined $deps->{$pkg}) {
	    for my $dep (@{$deps->{$pkg}}) {
	    	if (find_a_conflict($conflicts, $deps, $dep, $pkg2)) {
			return 1;
		}
	    }
	}
	if (defined $deps->{$pkg2}) {
	    for my $dep (@{$deps->{$pkg2}}) {
	    	if (find_a_conflict($conflicts, $deps, $pkg, $dep)) {
			return 1;
		}
	    }
	}
	return 0;
}

sub compute_problems
{
    my ($h, $conflicts, $deps) = @_;

    while (my ($key, $l) = each %$h) {
	    my %s = map {($_, 1)} @$l;
	    @$l = sort keys %s;
	    if (@$l > 1) {
	    	my $hv = join(',', @$l);
		if (!defined $cache->{$hv}) {
			# create a list of unconflicting packages.
			my $l2 = [];
			for my $pkg (@$l) {
				my $keepit = 0;
			    for my $pkg2 (@$l) {
			    	next if $pkg eq $pkg2;
				if (!(find_a_conflict($conflicts, $deps, $pkg, $pkg2) ||
					find_a_conflict($conflicts, $deps, $pkg2, $pkg))) {
					$keepit = 1;
					last;
				}
			    }
			    if ($keepit) {
				push(@$l2, $pkg);
			    }
			}
			$cache->{$hv} = $l2;
		}
		my $result = $cache->{$hv};
		if (@$result != 0) {
		    my $newkey = join(',', @$result);
		    if (@$result == 1) {
			    $newkey.="-> was ".join(',', @$l);
		    }
		    $cache2->{$newkey} = [] unless defined($cache2->{$newkey});
		    push(@{$cache2->{$newkey}}, $key);
		}
	    }
    }
}

my $filehash={};
my %dirhash=();
my $conflicts={};
my $dephash={};
our ($opt_d, $opt_v);

sub handle_file
{
	my $filename = shift;
	my $plist = OpenBSD::PackingList->fromfile($filename);
	if (!defined $plist) {
		print STDERR "Error reading $filename\n";
		return;
	}
	print "$filename -> ", $plist->pkgname(), "\n" if $opt_v;
	$plist->forget();
	$conflicts->{$plist->pkgname()} = 
	    OpenBSD::PkgCfl->make_conflict_list($plist);
	$plist->visit('register', $filehash, $dephash, $plist->pkgname());
}

set_usage('find-all-conflicts [-v] [-d plist_dir] [pkgname ...]');
try {
    getopts('d:v');
} catchall {
	Usage($_);
};

print "Scanning packages\n" if $opt_v;
print "-----------------\n" if $opt_v;
if ($opt_d) {
	opendir(my $dir, $opt_d);
	while (my $pkgname = readdir($dir)) {
	    next if $pkgname eq '.' or $pkgname eq '..';
	    handle_file("$opt_d/$pkgname");
    	}
	closedir($dir);
} elsif (@ARGV==0) {
	@ARGV=(<*.tgz>);
}

for my $pkgname (@ARGV) {
	print STDERR "$pkgname\n";
	my $true_package = OpenBSD::PackageLocator->find($pkgname);
	next unless $true_package;
	my $dir = $true_package->info();
	$true_package->close();
	handle_file($dir.CONTENTS);
	rmtree($dir);
}

print "File problems:\n";
print "-------------\n";
compute_problems($filehash, $conflicts, $dephash);
for my $cfl (sort keys %$cache2) {
	print "$cfl\n";
	for my $f (sort @{$cache2->{$cfl}}) {
		print "\t$f\n";
	}
}