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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/>. package Dpkg::BuildProfiles; use strict; use warnings; our $VERSION = '1.00'; our @EXPORT_OK = qw( get_build_profiles set_build_profiles parse_build_profiles evaluate_restriction_formula ); use Exporter qw(import); use List::Util qw(any); use Dpkg::BuildEnv; my $cache_profiles; my @build_profiles; =encoding utf8 =head1 NAME Dpkg::BuildProfiles - handle build profiles =head1 DESCRIPTION The Dpkg::BuildProfiles module provides functions to handle the 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) = @_; $cache_profiles = 1; @build_profiles = @profiles; Dpkg::BuildEnv::set('DEB_BUILD_PROFILES', join ' ', @profiles); } =item @profiles = parse_build_profiles($string) Parses a build profiles specification, into an array of array references. =cut sub parse_build_profiles { my $string = shift; $string =~ s/^\s*<\s*(.*)\s*>\s*$/$1/; return map { [ split ' ' ] } split /\s*>\s+<\s*/, $string; } =item evaluate_restriction_formula(\@formula, \@profiles) Evaluate whether a restriction formula of the form "<foo bar> <baz>", given as a nested array, is true or false, given the array of enabled build profiles. =cut sub evaluate_restriction_formula { my ($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/^(!)?(.+)/; 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 don't have to evaluate # the others. return 1 if $seen_profile; } return 0; } =back =head1 CHANGES =head2 Version 1.00 (dpkg 1.17.17) Mark the module as public. =cut 1;