#! /usr/bin/perl
# ex:ts=8 sw=4:
# $OpenBSD: pkg_create,v 1.23 2004/10/12 09:34:01 espie Exp $
#
# Copyright (c) 2003-2004 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::md5;
use OpenBSD::Temp;
use OpenBSD::Error;
use Symbol;
use File::Basename;

# Extra stuff needed to archive files
package OpenBSD::PackingElement;
sub archive_cmd { () }

package OpenBSD::PackingElement::FileBase;
sub archive_cmd
{
	my ($self, $pfh, $use_cwd) = @_;
	my $fh = $$pfh;
	print $fh $self->{name}, "\n";
	if (@$use_cwd != 0) {
	    my @r = @$use_cwd;
	    @$use_cwd = ();
	    return @r;
	} else {
	    return ();
	}
}

package OpenBSD::PackingElement::Cwd;
use OpenBSD::Temp;

sub archive_cmd
{
	my ($self, $pfh, $use_cwd, $dir, $base) = @_;
	my ($fh, $fname) = OpenBSD::Temp::list($dir);
	$$pfh = $fh;
	@$use_cwd = ("-C", $base."/".$self->{name}, "-I", $fname );
	return ();
}

package OpenBSD::PackingElement::DirRm;
my $warned;

sub compute_checksum
{
	if (!$warned) {
		print STDERR "Warning: \@dirrm is deprecated\n";
		$warned=1;
	}
}

package OpenBSD::PackingElement;

sub compute_checksum
{
}

package OpenBSD::PackingElement::FileBase;
use OpenBSD::md5;

sub compute_checksum
{
	my ($self, $plist, $base, $stash) = @_;
	my $fname = $self->fullname();
	if (-l "$base/$fname") {
		my $value = readlink "$base/$fname";
		$self->make_symlink($value);
		return if $base eq '/' or $base eq '';
		if ($value =~ m/^\Q$base/) {
			print STDERR "Error in package: symlink $base/$fname refers to $value\n";
			$main::errors++;
		}
	} elsif (-f _) {
		my ($dev, $ino, $size) = (stat _)[0,1,7];
		if (defined $stash->{"$dev/$ino"}) {
			$self->make_hardlink($stash->{"$dev/$ino"});
		} else {
			$stash->{"$dev/$ino"} = $fname;
			$self->{md5} = OpenBSD::md5::fromfile("$base/$fname");
			$self->{size} = $size;
		}
	} else {
		print STDERR "Error in package: $base/$fname does not exist\n";
		$main::errors++;
	}
}

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

package OpenBSD::PackingList;

sub archive_cmd
{
	my ($self, $dir, $base) = @_;
	my $fh;
	my @use_cwd = ();
	my @cmd = ();
	for my $item (@{$self->{items}}) {
		push(@cmd, $item->archive_cmd(\$fh, \@use_cwd, $dir, $base));
	}
	return @cmd;
}

sub makesum
{
	my ($self, $base) = @_;
	my $stash = {};
	my $oldlist = $self->{items};
	$self->{items} = [];
	for my $item (@$oldlist) {
		push @{$self->{items}}, $item;
		$self->{state}->{cwd} = $item->{cwd} if defined $item->{cwd};
		$item->compute_checksum($self, $base, $stash);
	}
}

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


package main;

my %defines;

sub dosubst
{
	local $_ = shift;
	while (my ($k, $v) = each %defines) {
		s/\$\{\Q$k\E\}/$v/g;
	}
	s/\$\\/\$/g;
	return $_;
}

sub copy_subst
{
	my ($srcname, $destname) = @_;
	open my $src, '<', $srcname or die "can't open $srcname";
	open my $dest, '>', $destname or die "can't open $destname";
	local $_;
	while (<$src>) {
		print $dest dosubst($_);
	}
}

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

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

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

	$noto =~ s/PFRAG\./PFRAG.no-$frag-/ or
	    $noto =~ s/PLIST/PFRAG.no-$frag/;
	unless (-e $o or -e $noto) {
		die "Missing fragments for $frag";
	}
	if ($not) {
		print "Switching to $noto\n";
		return $noto if -e $noto;
    	} else {
		print "Switching to $o\n";
		return $o if -e $o;
	}
	return;
}

our $errors = 0;

our ($opt_p, $opt_f, $opt_c, $opt_d, $opt_v, $opt_i, $opt_k, $opt_r, 
	$opt_S, $opt_h, $opt_s, $opt_O, $opt_A, $opt_L,
	$opt_M, $opt_U,
	$opt_B);

my @contents;

getopts('p:f:c:d:vi:k:r:M:U:S:hs:OA:L:B:D:', 
	{'D' => 
		sub { 
			local $_ = shift;
			if (m/\=/) {
				$defines{$`} = $';
			} else {
				$defines{$_} = 1;
			}
		},
	 'f' =>
	 	sub {
			push(@contents, shift);
		}
	});

if (@ARGV != 1) {
	die "Exactly one single package name is required";
}

my $dir = OpenBSD::Temp::dir();

if (defined $opt_s) {
	die "Option s is no longer supported";
}

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

if (!@contents) {
	die "Packing list required";
}

if (defined $opt_c) {
    if ($opt_c =~ /^\-/) {
	open(my $fh, '>', $dir.COMMENT) or die "Can't write to COMMENT: $!";
	print $fh $';
	close($fh);
    } else {
	copy_subst($opt_c, $dir.COMMENT);
    }
} else {
	die "Comment required";
}

if (defined $opt_d) {
    if ($opt_d =~ /^\-/) {
	open(my $fh, '>', $dir.DESC) or die "Can't write to DESC: $!";
	print $fh $';
	close($fh);
    } else {
	copy_subst($opt_d, $dir.DESC);
    }
} else {
	die "Description required";
}

print "Creating package $ARGV[0]\n" if $opt_v;

if (defined $opt_i) {
    copy_subst($opt_i, $dir.INSTALL);
}
	
if (defined $opt_k) {
    copy_subst($opt_k, $dir.DEINSTALL);
}

if (defined $opt_r) {
    copy_subst($opt_r, $dir.REQUIRE);
}

if (defined $opt_M) {
    copy_subst($opt_M, $dir.DISPLAY);
}

if (defined $opt_U) {
    copy_subst($opt_U, $dir.UNDISPLAY);
}

my $plist = new OpenBSD::PackingList;
my @extra_files = ();
for my $special (info_names()) {
    next unless -f $dir.$special;
    push(@extra_files, $special);
    my $f = OpenBSD::PackingElement::File->add($plist, $special);
    $f->{ignore} = 1;
    $f->{md5} = OpenBSD::md5::fromfile($dir.$special);
}

if (defined $opt_p) {
	OpenBSD::PackingElement::Cwd->add($plist, $opt_p);
} else {
	die "Prefix required";
}

if ($ARGV[0] =~ m|([^/]+)$|) {
	my $pkgname = $1;
	$pkgname =~ s/\.tgz$//;
	OpenBSD::PackingElement::Name->add($plist, $pkgname);
} 

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

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

for my $contentsfile (@contents) {
    $plist->fromfile($contentsfile,
	sub {
		my ($fh, $cont) = @_;
		local $_;
		my (@fhstack, @namestack);
		push(@fhstack, $fh);
		push(@namestack, $contentsfile);
		while($fh = pop @fhstack) {
			my $fname = pop @namestack;
			GETLINE:
			while (<$fh>) {
				if (m/^(\!)?\%\%(.*)\%\%$/) {
					my ($not, $frag) = ($1, $2);
					my $def = $frag;
					if ($frag eq 'SHARED') {
						$def = 'SHARED_LIBS';
						$frag = 'shared';
					}
					if (!defined $defines{$def}) {
						die "Error: unknown fragment $frag";
					} elsif ($defines{$def} == 1) {
						next GETLINE if defined $not;
					} elsif ($defines{$def} == 0) {
						next GETLINE unless defined $not;
					} else {
						die "Incorrect define for $frag";
					}
					my $newname = deduce_name($fname, $frag, $not);
					if (defined $newname) {
						push(@fhstack, $fh);
						push(@namestack, $fname);
						$fname = $newname;
						$fh = gensym;
						open($fh, '<', $fname) or die "missing file $fname";
					}
					next GETLINE;
				}
				&$cont(dosubst($_));
			}
		}
	}
    ) or die "Can't open packing list $contentsfile";
}


my $base = '/';
if (defined $opt_B) {
	$base = $opt_B;
} elsif (defined $opt_S) {
	$base = $opt_S;
} elsif (defined $ENV{'PKG_PREFIX'}) {
	$base = $ENV{'PKG_PREFIX'};
}

$plist->makesum($base);
$plist->avert_duplicates();
if (defined $plist->{pkgcfl}) {
	print STDERR "Error: \@pkgcfl is obsolete, use \@conflict instead\n";
	$errors++;
}
if ($errors) {
	exit(1);
}

my @cmd = $plist->archive_cmd($dir, $base);


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

print "Creating gzip'd tar ball in '$ARGV[0]'\n" if $opt_v;
System('tar', $opt_h ? "zcfh" : "zcf", $ARGV[0], "-C", $dir, CONTENTS,
    @extra_files, @cmd) == 0 or
	die "tar failed";