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# ex:ts=8 sw=4:
# $OpenBSD: RequiredBy.pm,v 1.17 2008/10/20 10:25:16 espie Exp $
#
# Copyright (c) 2003-2005 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;
package OpenBSD::RequirementList;
use OpenBSD::PackageInfo;
sub fill_entries
{
my $self = shift;
if (!exists $self->{entries}) {
my $l = $self->{entries} = {};
if (-f $self->{filename}) {
open(my $fh, '<', $self->{filename}) or
die "Problem opening required list: ",
$self->{filename}, ": $!";
my $_;
while(<$fh>) {
s/\s+$//o;
next if /^$/o;
chomp;
$l->{$_} = 1;
}
close($fh);
$self->{nonempty} = 1;
} else {
$self->{nonempty} = 0;
}
}
}
sub synch
{
my $self = shift;
return if $main::not;
if (!unlink $self->{filename}) {
if ($self->{nonempty}) {
die "Can't erase $self->{filename}: $!";
}
}
if (%{$self->{entries}}) {
open(my $fh, '>', $self->{filename}) or
die "Can't write $self->{filename}: $!";
while (my ($k, $v) = each %{$self->{entries}}) {
print $fh "$k\n";
}
close($fh) or
die "Write to $self->{filename} didn't work: $!";
$self->{nonempty} = 1;
} else {
$self->{nonempty} = 0;
}
}
sub list
{
my $self = shift;
if (wantarray) {
$self->fill_entries;
return keys %{$self->{entries}};
} else {
if (exists $self->{entries}) {
return %{$self->{entries}} ? 1 : 0;
} elsif (!exists $self->{nonempty}) {
$self->{nonempty} = -f $self->{filename} ? 1 : 0;
}
return $self->{nonempty};
}
}
sub delete
{
my ($self, @pkgnames) = @_;
$self->fill_entries($self);
for my $pkg (@pkgnames) {
delete $self->{entries}->{$pkg};
}
$self->synch;
}
sub add
{
my ($self, @pkgnames) = @_;
$self->fill_entries($self);
for my $pkg (@pkgnames) {
$self->{entries}->{$pkg} = 1;
}
$self->synch;
}
my $cache = {};
sub new
{
my ($class, $pkgname) = @_;
my $f = installed_info($pkgname).$class->filename;
if (!exists $cache->{$f}) {
return $cache->{$f} = bless { filename => $f }, $class;
}
return $cache->{$f};
}
sub forget
{
my ($class, $dir) = @_;
my $f = $dir.$class->filename;
if (exists $cache->{$f}) {
$cache->{$f}->{entries} = {};
$cache->{$f}->{nonempty} = 0;
}
}
sub compute_closure
{
my ($class, @seed) = @_;
my @todo = @seed;
my %done = ();
while (my $pkgname = pop @todo) {
next if $done{$pkgname};
$done{$pkgname} = 1;
for my $dep ($class->new($pkgname)->list) {
next if defined $done{$dep};
push(@todo, $dep);
}
}
return keys %done;
}
package OpenBSD::RequiredBy;
our @ISA=qw(OpenBSD::RequirementList);
use OpenBSD::PackageInfo;
sub filename() { REQUIRED_BY };
package OpenBSD::Requiring;
our @ISA=qw(OpenBSD::RequirementList);
use OpenBSD::PackageInfo;
sub filename() { REQUIRING };
1;
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