#! /usr/bin/perl
# ex:ts=8 sw=4:
# $OpenBSD: pkg_create,v 1.125 2009/12/13 08:54:32 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::PackingList;
use OpenBSD::PackageInfo;
use OpenBSD::Getopt;
use OpenBSD::Temp;
use OpenBSD::Error;
use OpenBSD::Ustar;
use OpenBSD::ArcCheck;
use OpenBSD::Paths;
use OpenBSD::Subst;
use File::Basename;

# Extra stuff needed to archive files
package OpenBSD::PackingElement;

sub create_package 
{
	my ($self, $arc, $base, $verbose) = @_;

	$self->archive($arc, $base);
	if ($verbose) {
		$self->comment_create_package;
	}
}

sub pretend_to_archive
{
	my ($self, $arc, $base) = @_;
	$self->comment_create_package;
}

sub archive {}
sub comment_create_package {}

sub print_file {}

sub avert_duplicates_and_other_checks
{
	my ($self, $allfiles) = @_;
	return unless $self->NoDuplicateNames;
	my $n = $self->fullname;
	if (defined $allfiles->{$n}) {
		print STDERR "Error in packing-list: duplicate item $n\n";
		$main::errors++;
	}
	$allfiles->{$n} = 1;
}

sub makesum_plist
{
	my ($self, $plist, $base, $stash) = @_;
	$self->add_object($plist);
}

sub verify_checksum
{
}

sub compute_checksum
{
	my ($self, $result, $base, $stash) = @_;
	my $name = $self->fullname;
	my $fname = $name;
	if (defined $base) {
		$fname = $base.$fname;
	}

	if (-l $fname) {
		my $value = readlink $fname;
		$result->make_symlink($value);
	} elsif (-f _) {
		my ($dev, $ino, $size) = (stat _)[0,1,7];
		if (defined $stash->{"$dev/$ino"}) {
			$result->make_hardlink($stash->{"$dev/$ino"});
		} else {
			$stash->{"$dev/$ino"} = $name;
			$result->add_digest($self->compute_digest($fname));
			$result->add_size($size);
		}
	} else {
		print STDERR "Error in package: $fname does not exist\n";
		$main::errors++;
	}
}

sub makesum_plist_with_base
{
	my ($self, $plist, $base, $stash) = @_;
	$self->compute_checksum($self, $base, $stash);
	$self->add_object($plist);
}

sub verify_checksum_with_base
{
	my ($self, $base, $stash) = @_;
	my $check = ref($self)->new($self->name);
	$self->compute_checksum($check, $base, $stash);

	for my $field (qw(symlink link size)) {  # md5
		if ((defined $check->{$field} && defined $self->{$field} &&
		    $check->{$field} ne $self->{$field}) ||
		    (defined $check->{$field} xor defined $self->{$field})) {
			print STDERR "Error: $field inconsistency for ", 
			    $self->fullname, "\n";
			$main::errors++;
		}
	}
	if ((defined $check->{d} && defined $self->{d} &&
	    !$check->{d}->equals($self->{d})) ||
	    (defined $check->{d} xor defined $self->{d})) {
		print STDERR "Error: checksum inconsistency for ", 
		    $self->fullname, "\n";
		$main::errors++;
	}
}


sub prepare_for_archival
{
	my ($self, $arc) = @_;

	my $o = $arc->prepare_long($self);
	if (!$o->verify_modes($self)) {
		$main::errors++;
	}
	return $o;
}

sub copy_over
{
}
package OpenBSD::PackingElement::SpecialFile;
sub archive
{
	&OpenBSD::PackingElement::FileBase::archive;
}

sub pretend_to_archive
{
	&OpenBSD::PackingElement::FileBase::pretend_to_archive;
}

sub comment_create_package
{
	my ($self) = @_;
	print "Adding ", $self->name, "\n";
}

sub makesum_plist
{
	my ($self, $plist, $base, $stash) = @_;
	$self->makesum_plist_with_base($plist, undef, $stash);
}

sub verify_checksum
{
	my ($self, $base, $stash) = @_;
	$self->verify_checksum_with_base(undef, $stash);
}

sub prepare_for_archival
{
	my ($self, $arc) = @_;

	my $o = $arc->prepare_long($self);
	$o->{uname} = 'root';
	$o->{gname} = 'wheel';
	$o->{uid} = 0;
	$o->{gid} = 0;
	$o->{mode} &= 0555; # zap all write and suid modes
	return $o;
}

sub copy_over
{
	my ($self, $wrarc, $rdarc) = @_;
	$wrarc->destdir($rdarc->info);
	my $e = $wrarc->prepare($self->{name});
	$e->write;
}

# override for CONTENTS: we cannot checksum this.
package OpenBSD::PackingElement::FCONTENTS;
sub makesum_plist
{
}

sub verify_checksum
{
}


package OpenBSD::PackingElement::Cwd;
sub archive
{
	my ($self, $arc, $base) = @_;
	$arc->destdir($base."/".$self->name);
}

sub pretend_to_archive
{
	my ($self, $arc, $base) = @_;
	$arc->destdir($base."/".$self->name);
	$self->comment_create_package;
}

sub comment_create_package
{
	my ($self) = @_;
	print "Cwd: ", $self->name, "\n";
}

package OpenBSD::PackingElement::FileBase;

sub archive
{
	my ($self, $arc, $base) = @_;

	my $o = $self->prepare_for_archival($arc);

	$o->write unless $main::errors;
}

sub pretend_to_archive
{
	my ($self, $arc, $base) = @_;

	$self->prepare_for_archival($arc);
	$self->comment_create_package;
}

sub comment_create_package
{
	my ($self) = @_;
	print "Adding ", $self->name, "\n";
}

sub print_file
{
	my ($item) = @_;
	print '@', $item->keyword, " ", $item->fullname, "\n";
}

sub makesum_plist
{
	my ($self, $plist, $base, $stash) = @_;
	$self->makesum_plist_with_base($plist, $base, $stash);
}

sub verify_checksum
{
	my ($self, $base, $stash) = @_;
	$self->verify_checksum_with_base($base, $stash);
}

sub copy_over
{
	my ($self, $wrarc, $rdarc) = @_;
	my $e = $rdarc->next;
	if (!$e->check_name($self)) {
		die "Names don't match: ", $e->{name}, " ", $self->{name};
	}
	$e->copy_long($wrarc);
}

package OpenBSD::PackingElement::InfoFile;
sub makesum_plist
{
	my ($self, $plist, $base, $stash) = @_;
	$self->SUPER::makesum_plist($plist, $base, $stash);
	my $fname = $self->fullname;
	for (my $i = 1; ; $i++) {
		if (-e "$base/$fname-$i") {
			my $e = OpenBSD::PackingElement::File->add($plist, $self->name."-".$i);
			$e->compute_checksum($e, $base, $stash);
		} else {
			last;
		}
	}
}

# put together file and filename, in order to handle fragments simply
package MyFile;
sub new
{
	my ($class, $filename) = @_;

	open(my $fh, '<', $filename) or die "Missing file $filename";

	bless { fh => $fh, name => $filename }, $class;
}

sub readline
{
	my $self = shift;
	return readline $self->{fh};
}

sub name
{
	my $self = shift;
	return $self->{name};
}

sub close
{
	my $self = shift;
	close($self->{fh});
}

package main;

my $subst = OpenBSD::Subst->new;

our ($opt_p, $opt_f, $opt_c, $opt_d, $opt_v, $opt_i, $opt_k,
	$opt_S, $opt_s, $opt_O, $opt_A, $opt_L,
	$opt_M, $opt_U, $opt_P, $opt_W, $opt_n,
	$opt_B, $opt_q, $opt_Q);

sub deduce_name
{
	my ($o, $frag, $not) = @_;

	my $noto = $o;
	my $nofrag = "no-$frag";

	$o =~ s/PFRAG\./PFRAG.$frag-/o or
	    $o =~ s/PLIST/PFRAG.$frag/o;

	$noto =~ s/PFRAG\./PFRAG.no-$frag-/o or
	    $noto =~ s/PLIST/PFRAG.no-$frag/o;
	unless (-e $o or -e $noto) {
		die "Missing fragments for $frag: $o and $noto don't exist";
	}
	if ($not) {
		print "Switching to $noto\n" if !defined $opt_q;
		return $noto if -e $noto;
    	} else {
		print "Switching to $o\n" if !defined $opt_q;
		return $o if -e $o;
	}
	return;
}

sub read_fragments
{
    my ($plist, $filename) = @_;

    my $stack = [];
    push(@$stack, MyFile->new($filename));

    return $plist->read($stack,
	sub {
		my ($stack, $cont) = @_;
		local $_;
		while(my $file = pop @$stack) {
			GETLINE:
			while ($_ = $file->readline) {
				if (my ($not, $frag) = m/^(\!)?\%\%(.*)\%\%$/) {
					my $def = $frag;
					if ($frag eq 'SHARED') {
						$def = 'SHARED_LIBS';
						$frag = 'shared';
					}
					if ($subst->has_fragment($def, $frag)) {
						next GETLINE if defined $not;
					} else {
						next GETLINE unless defined $not;
					}
					my $newname = deduce_name($file->name, $frag, $not);
					if (defined $newname) {
						push(@$stack, $file);
						$file = MyFile->new($newname);
					}
					next GETLINE;
				}
				if (m/^(\@comment\s+\$(?:Open)BSD\$)$/o) {
					$_ = '@comment $'.'OpenBSD: '.basename($file->name).',v$';
				}
				if (m/^\@lib\s+(.*)$/o && 
				    OpenBSD::PackingElement::Lib->parse($1)) {
					Warn "Shared library without SHARED_LIBS: $_";
					$main::errors++;
				}
				&$cont($subst->do($_));
			}
		}
	}
	);
}

sub add_special_file
{
	my ($plist, $name, $opt) = @_;
	if (defined $opt) {
	    my $o = OpenBSD::PackingElement::File->add($plist, $name);
	    $subst->copy($opt, $o->fullname) if defined $o->fullname;
	}
}

sub add_description
{
	my ($plist, $name, $opt_c, $opt_d) = @_;
	my $o = OpenBSD::PackingElement::FDESC->add($plist, $name);
	my $comment = $subst->value('COMMENT');
	if (defined $comment) {
		if (length $comment > 60) {
			print STDERR "Error: comment is too long\n";
			print STDERR $comment, "\n";
			print STDERR ' 'x60, "^"x (length($comment)-60), "\n";
			exit 1;
		}
	} elsif (!defined $opt_c) {
		Usage "Comment required";
	}
	if (!defined $opt_d) {
		Usage "Description required";
	}
	if (defined $o->fullname) {
	    open(my $fh, '>', $o->fullname) or die "Can't write to DESC: $!";
	    if (defined $comment) {
	    	print $fh $subst->do($comment), "\n";
	    } else {
		if ($opt_c =~ /^\-(.*)$/o) {
		    print $fh $1, "\n";
		} else {
		    $subst->copy_fh($opt_c, $fh);
		}
	    }
	    if ($opt_d =~ /^\-(.*)$/o) {
		print $fh $1, "\n";
	    } else {
		$subst->copy_fh($opt_d, $fh);
	    }
	    if (defined $comment) {
	    	print $fh "\n", $subst->do('Maintainer: ${MAINTAINER}'), "\n";
		if (!$subst->empty('HOMEPAGE')) {
			print $fh "\n", $subst->do('WWW: ${HOMEPAGE}'), "\n";
		}
	    }
	    close($fh);
	}
}

our $errors = 0;

my (@contents, %dependencies, %wantlib, @signature_params);

my $regen_package = 0;
my $sign_only = 0;
my ($cert, $privkey);


set_usage(
'pkg_create [-nQqv] [-A arches] [-B pkg-destdir] [-D name=value]',
'[-i iscript] [-k dscript] [-L localbase] [-M displayfile]',
'[-P pkg-dependency] [-p prefix] [-s x509 -s cert -s priv] [-S pkg-destdir]',
'[-U undisplayfile] [-W wantedlib] -c desc -d desc -f packinglist pkg-name');

my $plist = new OpenBSD::PackingList;
try { 
	getopts('p:f:c:d:vi:k:M:U:S:hs:OA:L:B:D:P:W:nqQ', 
	{'D' => 
		sub { 
			$subst->parse_option(shift);
		},
	 'f' =>
	 	sub {
			push(@contents, shift);
		},
	 'h' => sub {	Usage(); },
	 'P' => sub {
	 		my $d = shift;
	 		$dependencies{$d} = 1;
		},
	 'W' => sub {
	 		my $w = shift;
	 		$wantlib{$w} = 1;
		},
	 's' => sub {
	 		push(@signature_params, shift);
		}
	}); 
} catchall {
	Usage($_);
};

if (@ARGV == 0) {
	$regen_package = 1;
} elsif (@ARGV != 1) {
	if (@contents || @signature_params == 0) {
		Usage "Exactly one single package name is required: ", 
		    join(' ', @ARGV);
	}
}

try {

if (@signature_params > 0) {
	if (@signature_params != 3 || $signature_params[0] ne 'x509' || 
	    !-f $signature_params[1] || !-f $signature_params[2]) {
		Usage "Signature only works as -s x509 -s cert -s privkey";
	}
	$cert = $signature_params[1];
	$privkey = $signature_params[2];
}

if (defined $opt_O) {
	Usage "Option O is no longer supported";
}

if (defined $opt_Q) {
	$opt_q = 1;
}

if (!@contents) {
	if (@signature_params > 0) {
		$sign_only = 1;
	} else {
		Usage "Packing list required";
	}
}

if ($regen_package) {
	if (@contents != 1) {
		Usage "Exactly one single packing list is required";
	}
	if (-d $contents[0] && -f $contents[0].'/'.CONTENTS) {
		$plist->set_infodir($contents[0]);
		$contents[0] .= '/'.CONTENTS;
	} else {
		$plist->set_infodir(dirname($contents[0]));
	}
	$plist->fromfile($contents[0]) or 
	    Fatal "Can't read packing list $contents[0]";
} elsif ($sign_only) {
	if ($opt_n) {
		Fatal "Can't pretend to sign existing packages";
	}
	for my $pkgname (@ARGV) {
		require OpenBSD::PackageLocator;
		require OpenBSD::x509;

		my $true_package = OpenBSD::PackageLocator->find($pkgname);
		die "No such package $pkgname" unless $true_package;
		my $dir = $true_package->info;
		my $plist = OpenBSD::PackingList->fromfile($dir.CONTENTS);
		$plist->set_infodir($dir);
		my $sig = OpenBSD::PackingElement::DigitalSignature->new_x509;
		$sig->add_object($plist);
		$sig->{b64sig} = OpenBSD::x509::compute_signature($plist, 
		    $cert, $privkey);
		$plist->save;
		my $tmp = OpenBSD::Temp::permanent_file(".", "pkg");
		open( my $outfh, "|-", OpenBSD::Paths->gzip, "-o", $tmp);

		my $wrarc = OpenBSD::Ustar->new($outfh, ".");
		$plist->copy_over($wrarc, $true_package);
		$wrarc->close;
		$true_package->wipe_info;
		unlink($plist->pkgname.".tgz");
		rename($tmp, $plist->pkgname.".tgz") or 
		    die "Can't create final signed package $!";
	}
	exit(0);
} else {
	if (defined $opt_i) {
		print STDERR "Warning: INSTALL scripts are deprecated\n";
	}
	if (defined $opt_k) {
		print STDERR "Warning: DEINSTALL scripts are deprecated\n";
	}
	print "Creating package $ARGV[0]\n" if !(defined $opt_q) && $opt_v;
	if (!$opt_q) {
		$plist->set_infodir(OpenBSD::Temp->dir);
	}
	add_description($plist, DESC, $opt_c, $opt_d);
	add_special_file($plist, INSTALL, $opt_i);
	add_special_file($plist, DEINSTALL, $opt_k);
	add_special_file($plist, DISPLAY, $opt_M);
	add_special_file($plist, UNDISPLAY, $opt_U);
	if (defined $opt_p) {
		OpenBSD::PackingElement::Cwd->add($plist, $opt_p);
	} else {
		Usage "Prefix required";
	}
	for my $d (sort keys %dependencies) {
		OpenBSD::PackingElement::Dependency->add($plist, $d);
	}

	for my $w (sort keys %wantlib) {
		OpenBSD::PackingElement::Wantlib->add($plist, $w);
	}

	if (defined $opt_A) {
		OpenBSD::PackingElement::Arch->add($plist, $opt_A);
	}

	if (defined $opt_L) {
		OpenBSD::PackingElement::LocalBase->add($plist, $opt_L);
	}
	if ($ARGV[0] =~ m|([^/]+)$|o) {
		my $pkgname = $1;
		$pkgname =~ s/\.tgz$//o;
		$plist->set_pkgname($pkgname);
	}
	my $fullpkgpath = $subst->value('FULLPKGPATH');
	my $cdrom = $subst->value('PERMIT_PACKAGE_CDROM');
	my $ftp = $subst->value('PERMIT_PACKAGE_FTP');
	if (defined $fullpkgpath && defined $cdrom && defined $ftp) {
		$cdrom = 'yes' if $cdrom =~ m/^yes$/io;
		$ftp = 'yes' if $ftp =~ m/^yes$/io;

		OpenBSD::PackingElement::ExtraInfo->add($plist, 
		    $fullpkgpath, $cdrom, $ftp);
	}
	for my $contentsfile (@contents) {
		read_fragments($plist, $contentsfile) or 
		    Fatal "Can't read packing list $contentsfile";
	}
} 


my $base = '/';
if (defined $opt_B) {
	$base = $opt_B;
} elsif (defined $opt_S) {
	print STDERR "Warning: -S is deprecated, use -B instead\n";
	$base = $opt_S;
} elsif (defined $ENV{'PKG_PREFIX'}) {
	$base = $ENV{'PKG_PREFIX'};
}


unless (defined $opt_q && defined $opt_n) {
	if ($regen_package) {
		$plist->verify_checksum($base, {});
	} else {
		my $p2 = OpenBSD::PackingList->new;
		$plist->makesum_plist($p2, $base, {});
		$p2->set_infodir($plist->infodir);
		$plist = $p2;
	}
}

if (!defined $plist->{name}) {
	print STDERR "Can't write unnamed packing list\n";
	exit 1;
}

if (defined $opt_q) {
	if (defined $opt_Q) {
		$plist->print_file;
	} else {
		$plist->write(\*STDOUT);
	}
	exit 0 if defined $opt_n;
}

if ($plist->{deprecated}) {
	print STDERR "Error: found obsolete constructs\n";
	exit 1;
}

$plist->avert_duplicates_and_other_checks({});

if ($errors) {
	exit 1;
}

if (defined $cert) {
	my $sig = OpenBSD::PackingElement::DigitalSignature->new_x509;
	$sig->add_object($plist);
	require OpenBSD::x509;
	$sig->{b64sig} = OpenBSD::x509::compute_signature($plist, $cert, $privkey);
}
	
my $wname;
if ($regen_package) {
	$wname = $plist->pkgname.".tgz";
} else {
	$plist->save or Fatal "Can't write packing list";
	$wname = $ARGV[0];
}

if ($opt_n) {
	my $dummy = OpenBSD::Ustar->new(undef, $plist->infodir);
	$plist->pretend_to_archive($dummy, $base);
} else {
	print "Creating gzip'd tar ball in '$wname'\n" if $opt_v;
	my $h = sub { 
		unlink $wname; 
		my $caught = shift;
		$SIG{$caught} = 'DEFAULT';
		kill $caught, $$;
	};

	local $SIG{'INT'} = $h;
	local $SIG{'QUIT'} = $h;
	local $SIG{'HUP'} = $h;
	local $SIG{'KILL'} = $h;
	local $SIG{'TERM'} = $h;
	open(my $fh, "|-", OpenBSD::Paths->gzip, "-f", "-o", $wname);
	my $wrarc = OpenBSD::Ustar->new($fh, $plist->infodir);

	$plist->create_package($wrarc, $base, $opt_v);
	$wrarc->close;
	if ($errors) {
		unlink($wname);
		exit(1);
	}
}
} catch {
	print STDERR "$0: $_\n";
	exit(1);
};