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# A module for loading and managing debhelper buildsystem plugins.
#
# Copyright: © 2009 Modestas Vainius
# License: GPL-2+
package Debian::Debhelper::Dh_Buildsystems;
use strict;
use warnings;
use Debian::Debhelper::Dh_Lib;
use Exporter qw( import );
our @EXPORT_OK = qw( DEFAULT_BUILD_DIRECTORY );
# IMPORTANT: more specific buildsystems should go first
# XXX JEH as noted, this has to match historical order for back-compat
my @BUILDSYSTEMS = (
"autotools",
"cmake",
"perl_build",
"perl_makefile",
"python_distutils",
"makefile",
);
sub DEFAULT_BUILD_DIRECTORY {
return "obj-" . dpkg_architecture_value("DEB_BUILD_GNU_TYPE");
}
sub new {
my $cls=shift;
my %opts=@_;
my $self = bless({
'o_dir' => undef,
'o_system' => undef,
'loaded_buildsystems' => [] }, $cls);
# XXX JEH AFAICS, these 2 env variables are never used or documented
if (!exists $opts{noenv}) {
if (exists $ENV{DH_AUTO_BUILDDIRECTORY}) {
$self->_set_build_directory_option("env", $ENV{DH_AUTO_BUILDDIRECTORY});
}
if (exists $ENV{DH_AUTO_BUILDSYSTEM}) {
$self->{o_system} = $ENV{DH_AUTO_BUILDSYSTEM};
}
}
return $self;
}
sub get_options {
my $self=shift;
my @options=@_;
my $set_dir = sub { $self->_set_build_directory_option(@_) };
my $list_bs = sub { $self->list_buildsystems(@_); exit 0 };
push @options, (
"b:s" => $set_dir,
"build-directory:s" => $set_dir,
"builddirectory:s" => $set_dir,
"m=s" => \$self->{o_system},
"build-system=s" => \$self->{o_system},
"buildsystem=s" => \$self->{o_system},
"l" => $list_bs,
"--list" => $list_bs,
);
my %options = @options;
return \%options;
}
sub _set_build_directory_option {
# XXX JEH option argument is not used, would be less confusing to
# not pass extra getopt value in
my ($self, $option, $value) = @_;
if (!$value || $value eq "auto") {
# Autogenerate build directory name
$self->{o_dir} = DEFAULT_BUILD_DIRECTORY;
}
else {
$self->{o_dir} = $value;
}
}
# XXX JEH this sub is not used
sub _dump_options {
my $self=shift;
for my $opt (qw(o_dir o_system)) {
if (defined $self->{$opt}) {
print $opt, ": ", $self->{$opt}, "\n";
}
}
}
sub _get_buildsystem_module {
my ($self, $system) = @_;
my $module = "Debian::Debhelper::Buildsystem::$system";
if (grep $module, @{$self->{loaded_buildsystems}} == 0) {
eval "use $module";
if ($@) {
error("Unable to load buildsystem '$system': $@");
}
push @{$self->{loaded_buildsystems}}, $module;
}
return $module;
}
sub load_buildsystem {
# XXX JEH the $system param is never passed
# by any call to this function
my ($self, $action, $system) = @_;
if (!defined $system) {
$system = $self->{o_system};
}
if (defined $system) {
my $module = $self->_get_buildsystem_module($system);
verbose_print("Selected buildsystem (specified): ".$module->NAME());
return $module->new($self->{o_dir});
}
else {
# Try to determine build system automatically
for $system (@BUILDSYSTEMS) {
my $module = $self->_get_buildsystem_module($system);
my $inst = $module->new($self->{o_dir});
if ($inst->is_buildable($action)) {
verbose_print("Selected buildsystem (auto): ".$module->NAME());
return $inst;
}
}
}
return;
}
sub load_all_buildsystems {
my $self=shift;
for my $system (@BUILDSYSTEMS) {
$self->_get_buildsystem_module($system);
}
return @{$self->{loaded_buildsystems}};
}
sub list_buildsystems {
my $self=shift;
for my $system ($self->load_all_buildsystems()) {
printf("%s - %s.\n", $system->NAME(), $system->DESCRIPTION());
}
}
sub init_dh_auto_tool {
my $self=shift;
Debian::Debhelper::Dh_Lib::init(
options => $self->get_options(@_));
$self->{initialized}=1;
}
sub run_dh_auto_tool {
my $self=shift;
my $toolname = basename($0);
my $buildsystem;
# XXX JEH does this if ever not fire?
if (!exists $self->{initialized}) {
$self->init_dh_auto_tool();
}
# Guess action from the dh_auto_* name
$toolname =~ s/^dh_auto_//;
if (grep(/^\Q$toolname\E$/, qw{configure build test install clean}) == 0) {
error("Unrecognized dh auto tool: ".basename($0));
}
$buildsystem = $self->load_buildsystem($toolname);
if (defined $buildsystem) {
return $buildsystem->$toolname(@_, @{$dh{U_PARAMS}});
}
return 0;
}
# XXX JEH generally, why does this need to be an OO object at all?
# The entire state stored in this object is o_dir and o_system;
# and the object is used as a singleton. So why not have a single sub
# that parses the command line, loads the specified system, and uses it,
# passing it the build directory. It would be both shorter and easier to
# understand.
1;
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