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# Copyright © 2013 Guillem Jover <guillem@debian.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
=encoding utf8
=head1 NAME
Dpkg::BuildProfiles - handle build profiles
=head1 DESCRIPTION
The Dpkg::BuildProfiles module provides functions to handle the build
profiles.
=cut
package Dpkg::BuildProfiles 1.01;
use v5.36;
our @EXPORT_OK = qw(
get_build_profiles
set_build_profiles
build_profile_is_invalid
parse_build_profiles
evaluate_restriction_formula
);
use Exporter qw(import);
use List::Util qw(any);
use Dpkg::Gettext;
use Dpkg::ErrorHandling;
use Dpkg::BuildEnv;
my $cache_profiles;
my @build_profiles;
=head1 FUNCTIONS
=over 4
=item @profiles = get_build_profiles()
Get an array with the currently active build profiles, taken from
the environment variable B<DEB_BUILD_PROFILES>.
=cut
sub get_build_profiles {
return @build_profiles if $cache_profiles;
if (Dpkg::BuildEnv::has('DEB_BUILD_PROFILES')) {
@build_profiles = split ' ', Dpkg::BuildEnv::get('DEB_BUILD_PROFILES');
}
$cache_profiles = 1;
return @build_profiles;
}
=item set_build_profiles(@profiles)
Set C<@profiles> as the current active build profiles, by setting
the environment variable B<DEB_BUILD_PROFILES>.
=cut
sub set_build_profiles {
my (@profiles) = @_;
$cache_profiles = 1;
@build_profiles = @profiles;
Dpkg::BuildEnv::set('DEB_BUILD_PROFILES', join ' ', @profiles);
}
=item $bool = build_profile_is_invalid($string)
Validate a build profile formula.
=cut
my $profile_name_regex = qr{
!?
# Be lenient for now. Accept operators for extensibility, uppercase,
# and package name characters.
[
?/;:=@%*~_
A-Z
a-z0-9+.\-
]+
}x;
my $restriction_list_regex = qr{
<
\s*
(
$profile_name_regex
(?:
\s+
$profile_name_regex
)*
)
\s*
>
}x;
my $restriction_formula_regex = qr{
^
(?:
\s*
$restriction_list_regex
)*
\s*
$
}x;
sub build_profile_is_invalid($string)
{
return $string !~ $restriction_formula_regex;
}
=item @profiles = parse_build_profiles($string)
Parses a build profiles specification, into an array of array references.
It will die on invalid syntax.
=cut
sub parse_build_profiles($string)
{
# XXX: Workaround for incorrect usage of the API in dh-exec, remove once
# the usage is fixed.
if (build_profile_is_invalid($string)) {
$string = "<$string>";
}
if (build_profile_is_invalid($string)) {
error(g_("'%s' is not a valid build profile restriction formula"),
$string);
}
my @restrictions = $string =~ m{$restriction_list_regex}g;
return map { [ split ' ' ] } @restrictions;
}
=item evaluate_restriction_formula(\@formula, \@profiles)
Evaluate whether a restriction formula of the form "<foo bar> <baz>", given as
a nested array, is true or false, given the array of enabled build profiles.
=cut
sub evaluate_restriction_formula {
my ($formula, $profiles) = @_;
# Restriction formulas are in disjunctive normal form:
# (foo AND bar) OR (blub AND bla)
foreach my $restrlist (@{$formula}) {
my $seen_profile = 1;
foreach my $restriction (@$restrlist) {
next if $restriction !~ m/^(!)?(.+)/;
## no critic (RegularExpressions::ProhibitCaptureWithoutTest)
my $negated = defined $1 && $1 eq '!';
my $profile = $2;
my $found = any { $_ eq $profile } @{$profiles};
# If a negative set profile is encountered, stop processing.
# If a positive unset profile is encountered, stop processing.
if ($found == $negated) {
$seen_profile = 0;
last;
}
}
# This conjunction evaluated to true so we do not have to evaluate
# the others.
return 1 if $seen_profile;
}
return 0;
}
=back
=head1 CHANGES
=head2 Version 1.01 (dpkg 1.23.0)
New functions: build_profile_is_invalid().
=head2 Version 1.00 (dpkg 1.17.17)
Mark the module as public.
=cut
1;
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