#!/usr/bin/perl

=head1 NAME

dh_builddeb - build Debian binary packages

=cut

use strict;
use warnings;
use Debian::Debhelper::Dh_Lib;

our $VERSION = DH_BUILTIN_VERSION;

=head1 SYNOPSIS

B<dh_builddeb> [S<I<debhelper options>>] [B<--destdir=>I<directory>] [B<--filename=>I<name>] [S<B<--> I<params>>]

=head1 DESCRIPTION

B<dh_builddeb> simply calls L<dpkg-deb(1)> to build a Debian package
or packages.  It will also build dbgsym packages when L<dh_strip(1)>
and L<dh_gencontrol(1)> have prepared them.

It supports building multiple binary packages in parallel, when enabled by
DEB_BUILD_OPTIONS.

=head1 OPTIONS

=over 4

=item B<--destdir=>I<directory>

Use this if you want the generated F<.deb> files to be put in a directory
other than the default of "F<..>".

=item B<--filename=>I<name>

Use this if you want to force the generated .deb file to have a particular
file name. Does not work well if more than one .deb is generated!

=item B<--> I<params>

Pass I<params> to L<dpkg-deb(1)> when it is used to build the
package.

=item B<-u>I<params>

This is another way to pass I<params> to L<dpkg-deb(1)>.
It is deprecated; use B<--> instead.

=back

=cut

init(options => {
	"filename=s" => \$dh{FILENAME},
	"destdir=s" => \$dh{DESTDIR},
});

# Set the default destination directory.
if (! defined $dh{DESTDIR}) {
	$dh{DESTDIR}='..';
}

if (! defined $dh{FILENAME}) {
	$dh{FILENAME}='';
}
else {
	$dh{FILENAME}="/$dh{FILENAME}";
}

sub default_compressor_args {
	my ($default_comp, @args) = @_;

	for my $arg (@args) {
		# Explicit compressor arg given
		return @args if $arg =~ m/^-Z/;
	}

	return (@{$default_comp}, @args);
}

sub build_and_rename_deb {
	my ($package, $destdir, $cmd, $rename_sub) = @_;
	my $build_dir = "debian/.debhelper/scratch-space/build-${package}";
	my ($dpkg_filename, $desired_filename);
	install_dir($build_dir);
	doit(@${cmd}, $build_dir);
	opendir(my $fd, $build_dir);
	for my $name (readdir($fd)) {
		next if $name eq '.' or $name eq '..';
		if ($dpkg_filename) {
			error("\"@{$cmd}\" produced two debs: $dpkg_filename and $name");
		}
		$dpkg_filename = $name;
	}
	closedir($fd);
	local $_ = $dpkg_filename;
	$rename_sub->();
	$desired_filename = $_;
	if ($desired_filename ne $dpkg_filename) {
		print "\tRenaming $dpkg_filename to $desired_filename\n";
	}
	rename_path("${build_dir}/${dpkg_filename}",
		"${destdir}/${desired_filename}");
}

my @items;

for my $package (@{$dh{DOPACKAGES}}) {
	push(@items, [$package, 0]);
	if (not is_udeb($package)) {
		my $dbgsym_tmpdir = "debian/.debhelper/${package}/dbgsym-root";
		my $dbgsym_control = "${dbgsym_tmpdir}/DEBIAN/control";
		if ( -f $dbgsym_control) {
			# Only build the dbgsym package if it has a control file.
			# People might have skipped dh_gencontrol.
			push(@items, [$package, 1]);
		} elsif (-d $dbgsym_tmpdir) {
			warning("Not building dbgsym package for ${package} as it has no control file");
			warning("Please use dh_gencontrol to avoid this issue");
		}
	}
}

on_items_in_parallel(\@items, sub {
	foreach my $item (@_) {
		my ($package, $dbgsym) = @{$item};
		my $tmp=tmpdir($package);

		if ($dbgsym) {
			my $dbgsym_tmpdir = "debian/.debhelper/${package}/dbgsym-root";
			# XXX: Should we blindly overrule the maintainer here?  It
			# is not apparent that their explicit -z was intended for
			# the dbgsym package.
			my @args = default_compressor_args(["-z1", "-Zxz", "-Sextreme"],
				@{$dh{U_PARAMS}});
			doit("dpkg-deb", @args,
				"--build", $dbgsym_tmpdir, $dh{DESTDIR});
			next;
		}
		if (exists $ENV{DH_ALWAYS_EXCLUDE} && length $ENV{DH_ALWAYS_EXCLUDE}) {
			if (! compat(5)) {
				complex_doit("find $tmp $dh{EXCLUDE_FIND} | xargs rm -rf");
			}
			else {
				# Old broken code here for compatibility. Does not
				# remove everything.
				complex_doit("find $tmp -name $_ | xargs rm -rf")
					foreach split(":", $ENV{DH_ALWAYS_EXCLUDE});
			}
		}
		if (! is_udeb($package)) {
			doit("dpkg-deb", @{$dh{U_PARAMS}}, "--build", $tmp, $dh{DESTDIR}.$dh{FILENAME});
		}
		else {
			my $filename=$dh{FILENAME};
			my @cmd = qw(dpkg-deb -z1 -Zxz -Sextreme);
			push(@cmd, @{$dh{U_PARAMS}}) if $dh{U_PARAMS};
			push(@cmd, '--build', $tmp);
			if (! $filename) {
				# dpkg-gencontrol does not include "Package-Type" in the
				# control file (see #575059, #452273) for political
				# reasons.
				#
				# dh_builddeb used to guess the "correct" filename, but it
				# fell short when dpkg-gencontrol -V was used.  The best
				# solution so far: Let dpkg-deb build the deb and
				# have dh_builddeb fix the extension.
				build_and_rename_deb($package, $dh{DESTDIR}, \@cmd,
					sub { s/\.deb$/\.udeb/g });
			} else {
				doit(@cmd, $dh{DESTDIR}.$filename);
			}
		}
	}
});

=head1 SEE ALSO

L<debhelper(7)>

This program is a part of debhelper.

=head1 AUTHOR

Joey Hess <joeyh@debian.org>

=cut