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# ex:ts=8 sw=4:
# $OpenBSD: PkgSpec.pm,v 1.2 2005/08/14 23:23:34 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;
package OpenBSD::PkgSpec;
# one useful function:
# OpenBSD::PkgSpec::match($pattern, @list) -> @sublist
# note that @sublist may contain duplicates
# all the shit that does handle package specifications
sub compare_pseudo_numbers
{
my ($n, $m) = @_;
my ($n1, $m1);
if ($n =~ m/^\d+/) {
$n1 = $&;
$n = $';
}
if ($m =~ m/^\d+/) {
$m1 = $&;
$m = $';
}
if ($n1 == $m1) {
return $n cmp $m;
} else {
return $n1 <=> $m1;
}
}
sub dewey_compare
{
my ($a, $b) = @_;
my ($pa, $pb);
unless ($b =~ m/p\d+$/) { # does the Dewey hold a p<number> ?
$a =~ s/p\d+$//; # No -> strip it from version.
}
return 0 if $a =~ /^$b$/; # bare equality
if ($a =~ s/p(\d+)$//) { # extract patchlevels
$pa = $1;
}
if ($b =~ s/p(\d+)$//) {
$pb = $1;
}
my @a = split(/\./, $a);
push @a, $pa if defined $pa; # ... and restore them
my @b = split(/\\\./, $b);
push @b, $pb if defined $pb;
while (@a > 0 && @b > 0) {
my $va = shift @a;
my $vb = shift @b;
next if $va eq $vb;
return compare_pseudo_numbers($va, $vb);
}
if (@a > 0) {
return 1;
} else {
return -1;
}
}
sub check_version
{
my ($v, $spec) = @_;
local $_;
# any version spec
return 1 if $spec eq '.*';
my @specs = split(/,/, $spec);
for (grep /^\d/, @specs) { # exact number: check match
return 1 if $v =~ /^$_$/;
return 1 if $v =~ /^${_}p\d+$/; # allows for recent patches
}
# Last chance: dewey specs ?
my @deweys = grep !/^\d/, @specs;
for (@deweys) {
if (m/^\<\=|\>\=|\<|\>/) {
my ($op, $dewey) = ($&, $');
my $compare = dewey_compare($v, $dewey);
return 0 if $op eq '<' && $compare >= 0;
return 0 if $op eq '<=' && $compare > 0;
return 0 if $op eq '>' && $compare <= 0;
return 0 if $op eq '>=' && $compare < 0;
} else {
return 0; # unknown spec type
}
}
return @deweys == 0 ? 0 : 1;
}
sub check_1flavor
{
my ($f, $spec) = @_;
local $_;
for (split /-/, $spec) {
# must not be here
if (m/^\!/) {
return 0 if $f->{$'};
# must be here
} else {
return 0 unless $f->{$_};
}
}
return 1;
}
sub check_flavor
{
my ($f, $spec) = @_;
local $_;
# no flavor constraints
return 1 if $spec eq '';
$spec =~ s/^-//;
# retrieve all flavors
my %f = map +($_, 1), split /\-/, $f;
# check each flavor constraint
for (split /,/, $spec) {
if (check_1flavor(\%f, $_)) {
return 1;
}
}
return 0;
}
sub subpattern_match
{
my ($p, $list) = @_;
local $_;
my ($stemspec, $vspec, $flavorspec);
# then, guess at where the version number is if any,
# this finds patterns like -<=2.3,>=3.4.p1-
# the only constraint is that the actual number
# - must start with a digit,
# - not contain - or ,
if ($p =~ m/\-((?:\>|\>\=|\<|\<\=)?\d[^-]*)/) {
($stemspec, $vspec, $flavorspec) = ($`, $1, $');
# `any version' matcher
} elsif ($p =~ m/\-\*/) {
($stemspec, $vspec, $flavorspec) = ($`, '*', $');
# okay, so no version marker. Assume no flavor spec.
} else {
($stemspec, $vspec, $flavorspec) = ($p, '', '');
}
$stemspec =~ s/\./\\\./g;
$stemspec =~ s/\+/\\\+/g;
$stemspec =~ s/\*/\.\*/g;
$stemspec =~ s/\?/\./g;
$vspec =~ s/\./\\\./g;
$vspec =~ s/\+/\\\+/g;
$vspec =~ s/\*/\.\*/g;
$vspec =~ s/\?/\./g;
$p = $stemspec;
$p.="-.*" if $vspec ne '';
# First trim down the list
my @l = grep {/^$p$/} @$list;
my @result = ();
# Now, have to extract the version number, and the flavor...
for (@l) {
my ($stem, $v, $flavor);
if (m/\-(\d[^-]*)/) {
($stem, $v, $flavor) = ($`, $1, $');
if ($stem =~ m/^$stemspec$/ &&
check_version($v, $vspec) &&
check_flavor($flavor, $flavorspec)) {
push(@result, $_);
}
} else {
if ($vspec eq '') {
push(@result, $_);
}
}
}
return @result;
}
sub match
{
my ($pattern, @list) = @_;
my @l = ();
for my $subpattern (split /\|/, $pattern) {
push(@l, subpattern_match($subpattern, \@list));
}
return @l;
}
1;
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