#!/usr/bin/perl
# ex:ts=8 sw=4:
# $OpenBSD: pkg_delete,v 1.109 2007/06/16 09:29:37 espie Exp $
#
# Copyright (c) 2003-2007 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

use strict;
use warnings;
use OpenBSD::Getopt;
use OpenBSD::PackingList;
use OpenBSD::RequiredBy;
use OpenBSD::Error;
use OpenBSD::Interactive;
use OpenBSD::Delete;
use OpenBSD::PackageInfo;
use OpenBSD::Vstat;
use OpenBSD::Paths;
# use OpenBSD::UpdateSet;

our %forced = ();
our $not;

package OpenBSD::pkg_delete::State;
our @ISA=(qw(OpenBSD::pkg_foo::State));

package main;

set_usage('pkg_delete [-cIinqvx] [-B pkg-destdir] [-F keywords] pkg-name [...]');
our ($opt_v, $opt_D, $opt_d, $opt_n, $opt_q, $opt_p, $opt_c, $opt_L, $opt_B, $opt_I, $opt_i, $opt_x);

$opt_v = 0;

try { 
	getopts('vchixDdnf:F:qpS:L:B:I',
	    {'v' => sub {++$opt_v;},
	     'h' => sub { Usage(); },
	     'F' => sub { 
			    for my $o (split /\,/o, shift) { 
				    $forced{$o} = 1;
			    }
		    },
	     'f' => sub { 
			    for my $o (split /\,/o, shift) { 
				    $forced{$o} = 1;
			    }
	    	}}); 
} catchall {
	Usage($_);
};

if ($opt_D) {
	$opt_I = 1;
}
$opt_B = $ENV{'PKG_DESTDIR'} unless defined $opt_B;
$opt_B = '' unless defined $opt_B;
if ($opt_B ne '') {
	$opt_B.='/' unless $opt_B =~ m/\/$/o;
}
$ENV{'PKG_DESTDIR'} = $opt_B;

$opt_L = OpenBSD::Paths->localbase unless defined $opt_L;

if (defined $opt_p) {
	Usage "Option p is obsolete";
}
if (defined $opt_d) {
	Usage "Option d is obsolete";
}

my %done;
my $removed;

try {
my $state = OpenBSD::pkg_delete::State->new;
$state->{recorder} = OpenBSD::SharedItemsRecorder->new;
$state->{not} = $opt_n;
# XXX RequiredBy
$not = $opt_n;
$state->{quick} = $opt_q;
$state->{very_verbose} = $opt_v >=2;
$state->{verbose} = $opt_v;
$state->{beverbose} = $opt_n || ($opt_v >= 2);
$state->{extra} = $opt_c;
$state->{dont_run_scripts} = $opt_I;
$state->{forced} = \%forced;
$state->{destdir} = $opt_B;
$state->{interactive} = $opt_i;
if ($opt_B eq '') {
    $state->{destdirname} = '';
} else {
    $state->{destdirname} = '${PKG_DESTDIR}';
}

$ENV{'PKG_DELETE_EXTRA'} = $state->{extra} ? "Yes" : "No";

lock_db($opt_n);
$state->setup_progressmeter($opt_x);
$state->check_root;

# First, resolve pkg names

my @realnames;
my $bad;

OpenBSD::PackageInfo::solve_installed_names(\@ARGV, \@realnames, 
    "(removing them all)", $state);

my @todo = OpenBSD::RequiredBy->compute_closure(@realnames);

if (@todo > @realnames) {
	my $details = $state->{very_verbose} || $forced{verbosedeps};
	my $show    = sub {
		my ($p, $d) = @_;
		print "Can't remove ".join(' ', @$p)." without also removing:\n"
		    .join(' ', @$d)."\n";
	};
	if ($state->{interactive} || !$details) {
		my %deps = map {($_, 1)} @todo;
		for my $p (@realnames) {
			delete $deps{$p};
		}
		&$show([@realnames], [keys %deps]);
		if ((keys %deps) > 1 && OpenBSD::Interactive::confirm(
		    "Do you want details", $state->{interactive}, 1)) {
			$details = 1;
		}
	}
	if ($details) {
		for my $pkg (@realnames) {
			my @deps = OpenBSD::RequiredBy->compute_closure($pkg);
			next unless @deps > 1;
			@deps = grep {$_ ne $pkg} @deps;
			&$show([$pkg], [@deps]);
		}
	}
	my $them = @todo > 1 ? 'them' : 'it';
	if ($forced{dependencies} or 
	    OpenBSD::Interactive::confirm("Do you want to remove $them as well", $state->{interactive}, 0)) {
		print "(removing $them as well)\n";
	} else {
		$bad = 1;
	}
}

if ($bad) {
	exit(1);
}

eval {
# and finally, handle the removal
{ do {
	$removed = 0;
	DELETE: for my $pkgname (@todo) {
		next if $done{$pkgname};
		unless (is_installed($pkgname)) {
			print "$pkgname was not installed\n";
			$done{$pkgname} = 1;
			$removed++;
			next;
		}
		my $r = OpenBSD::RequiredBy->new($pkgname);
		if ($r->list > 0) {
			if ($forced{baddepend}) {
				for my $p ($r->list) {
					if ($done{$p}) {
						$r->delete($p);
					} else {
						next DELETE;
					}
				}
			} else {
				next;
			}
		}
		if (!$state->progress->set_header($pkgname)) {
			print $opt_n ? "Pretending to delete " : "Deleting ", 
			    "$pkgname\n";
		}
		$state->set_pkgname($pkgname);
		OpenBSD::Delete::delete_package($pkgname, $state);
		$done{$pkgname} = 1;
		$removed++;
	}
} while ($removed); } };

my $dielater = $@;

$state->{recorder}->cleanup($state);
OpenBSD::PackingElement::Lib::ensure_ldconfig($state);
OpenBSD::PackingElement::Fontdir::finish_fontdirs($state);

if ($state->{beverbose}) {
	OpenBSD::Vstat::tally();
}
$state->delayed_output;
rethrow $dielater;
} catch {
	print STDERR "$0: $_\n";
	exit(1);
};