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# A module for loading and managing debhelper build system classes.
# This module is intended to be used by all dh_auto_* programs.
#
# Copyright: © 2009 Modestas Vainius
# License: GPL-2+
package Debian::Debhelper::Dh_Buildsystems;
use strict;
use warnings;
use Debian::Debhelper::Dh_Lib;
use File::Spec;
use base 'Exporter';
our @EXPORT=qw(&buildsystems_init &buildsystems_do &load_buildsystem &load_all_buildsystems);
# Historical order must be kept for backwards compatibility. New
# build systems MUST be added to the END of the list.
our @BUILDSYSTEMS = (
"autoconf",
"perl_makemaker",
"makefile",
"python_distutils",
"perl_build",
"cmake",
"ant",
);
my $opt_buildsys;
my $opt_sourcedir;
my $opt_builddir;
my $opt_list;
sub create_buildsystem_instance {
my $system=shift;
my %bsopts=@_;
my $module = "Debian::Debhelper::Buildsystem::$system";
eval "use $module";
if ($@) {
error("unable to load build system class '$system': $@");
}
if (!exists $bsopts{builddir} && defined $opt_builddir) {
$bsopts{builddir} = ($opt_builddir eq "") ? undef : $opt_builddir;
}
if (!exists $bsopts{sourcedir} && defined $opt_sourcedir) {
$bsopts{sourcedir} = ($opt_sourcedir eq "") ? undef : $opt_sourcedir;
}
return $module->new(%bsopts);
}
# Similar to create_build system_instance(), but it attempts to autoselect
# a build system if none was specified. In case autoselection fails, undef
# is returned.
sub load_buildsystem {
my $system=shift;
my $step=shift;
if (defined $system) {
my $inst = create_buildsystem_instance($system, @_);
return $inst;
}
else {
# Try to determine build system automatically
for $system (@BUILDSYSTEMS) {
my $inst = create_buildsystem_instance($system, @_);
if ($inst->check_auto_buildable($step)) {
return $inst;
}
}
}
return;
}
sub load_all_buildsystems {
my $incs=shift || \@INC;
my (%buildsystems, @buildsystems);
for my $inc (@$incs) {
my $path = File::Spec->catdir($inc, "Debian/Debhelper/Buildsystem");
if (-d $path) {
for my $module_path (glob "$path/*.pm") {
my $name = basename($module_path);
$name =~ s/\.pm$//;
next if exists $buildsystems{$name};
$buildsystems{$name} = create_buildsystem_instance($name, @_);
}
}
}
# Standard debhelper build systems first
for my $name (@BUILDSYSTEMS) {
error("standard debhelper build system '$name' could not be found/loaded")
if not exists $buildsystems{$name};
push @buildsystems, $buildsystems{$name};
delete $buildsystems{$name};
}
# The rest are 3rd party build systems
for my $name (keys %buildsystems) {
my $inst = $buildsystems{$name};
$inst->{thirdparty} = 1;
push @buildsystems, $inst;
}
return @buildsystems;
}
sub buildsystems_init {
my %args=@_;
# Available command line options
my %options = (
"D=s" => \$opt_sourcedir,
"sourcedirectory=s" => \$opt_sourcedir,
"B:s" => \$opt_builddir,
"builddirectory:s" => \$opt_builddir,
"S=s" => \$opt_buildsys,
"buildsystem=s" => \$opt_buildsys,
"l" => \$opt_list,
"list" => \$opt_list,
);
$args{options}{$_} = $options{$_} foreach keys(%options);
Debian::Debhelper::Dh_Lib::init(%args);
}
sub buildsystems_list {
my $step=shift;
# List build systems (including auto and specified status)
my ($auto, $specified);
for my $inst (load_all_buildsystems()) {
my $is_specified = defined $opt_buildsys && $opt_buildsys eq $inst->NAME();
if (! defined $specified && defined $opt_buildsys && $opt_buildsys eq $inst->NAME()) {
$specified = $inst->NAME();
}
elsif (! defined $auto && ! $inst->{thirdparty} && $inst->check_auto_buildable($step)) {
$auto = $inst->NAME();
}
printf("%-20s %s", $inst->NAME(), $inst->DESCRIPTION());
print " [3rd party]" if $inst->{thirdparty};
print "\n";
}
print "\n";
print "Auto-selected: $auto\n" if defined $auto;
print "Specified: $specified\n" if defined $specified;
print "No system auto-selected or specified\n"
if ! defined $auto && ! defined $specified;
}
sub buildsystems_do {
my $step=shift;
if (!defined $step) {
$step = basename($0);
$step =~ s/^dh_auto_//;
}
if (grep(/^\Q$step\E$/, qw{configure build test install clean}) == 0) {
error("unrecognized build step: " . $step);
}
if ($opt_list) {
buildsystems_list($step);
exit 0;
}
my $buildsystem = load_buildsystem($opt_buildsys, $step);
if (defined $buildsystem) {
$buildsystem->pre_building_step($step);
$buildsystem->$step(@_, @{$dh{U_PARAMS}});
$buildsystem->post_building_step($step);
}
return 0;
}
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