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# Copyright (C) 2005 Mandriva
# Olivier Blin <oblin@mandriva.com>
# Copyright (C) 2017-2020 Mageia
# Martin Whitaker <mageia@martin-whitaker.me.uk>
#
# 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, 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, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA.
# SYNOPSIS
# --------
# This package provides a function to build the compressed image that will
# be mounted as a loopback filesystem when booting a Live system.
package MGA::DrakISO::BuildLoop;
use strict;
use MDK::Common;
use File::Temp qw(tmpnam);
use MGA::DrakISO::LiveBuild;
use MGA::DrakISO::Utils;
use Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(build_live_loopback_file);
# This is the top-level function called to build the loopback image. The Live
# root filesystem must have been prepared before calling this function.
#
sub build_live_loopback_file {
my ($build) = @_;
my $root = $build->get_live_root;
# make sure no external filesystems are mounted before creating the loopback
umount_all_in_root($root);
my $total = directory_usage($root);
print "Have to process " . int($total/1000000) . " MB\n" if $::verbose;
my $dest = $build->get_build_dir('loopbacks') . '/distrib.sqfs';
mkdir_p(dirname($dest));
my $exclude_list = tmpnam();
my @excluded_files = expand_file_list($build, @{$build->{loopbacks}{exclude} || []});
output_p($exclude_list, map { $root . "$_\n" } grep { run_as_root('test', '-e', $root . $_) } @excluded_files);
my ($compress_type, $compress_level) = split(':', $build->{loopbacks}{compression} || 'zstd:18');
my $sort = $build->{settings}{config_root} . '/config/distrib.sort';
run_as_root(join(' ',
'mksquashfs',
$root, $dest,
'-noappend',
'-comp', $compress_type,
if_($compress_type eq 'zstd' && $compress_level,
'-Xcompression-level', $compress_level
),
'-b', '1048576',
'-ef', $exclude_list,
if_(-f $sort, '-sort', $sort),
if_($::verbose > 2, '-info', '-progress'),
if_($::verbose < 2, '-no-progress'),
# due to lack of a -quiet option
if_($::verbose < 2, '> /dev/null'),
)) or die "ERROR: unable to run mksquashfs\n";
unlink $exclude_list;
}
sub expand_file_list {
my ($build, @files) = @_;
map {
$_->{path} ?
$_->{path} :
chomp_(cat_(glob(($_->{rooted} && $build->get_live_root) . $_->{source})));
} @files;
}
1;
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