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#!/usr/bin/perl

# Must be done as early as possible to avoid issues when displaying translated
# strings
BEGIN {
    push @::textdomains, 'draklive-install';
    $::isLiveInstall = 1;
}

use lib qw(/usr/lib/libDrakX);
use standalone;
use interactive;
use fs;
use fs::any;
use fs::type;
use fs::partitioning;
use fs::partitioning_wizard;
use partition_table;
use MDK::Common;
use common;
use feature qw(state);
use File::Basename;
use ugtk3;

my $logfile = '/tmp/draklive-install.log';
{
    package log;

    my $LOG;

    sub l {
        if (!$LOG) {
            open $LOG, '>', $logfile;
            select((select($LOG),  $| = 1)[0]);
        }
        print $LOG "* ", @_, "\n";
    }
}

my $child_pid;
END {
    run_program::terminate($child_pid) if $child_pid;
}

sub wait_loop_callback {
    my ($pid) = @_;
    $child_pid = $pid;
    while (Gtk3::events_pending()) {
        Gtk3::main_iteration();
    }
    $child_pid = undef;
}
run_program::set_wait_loop_callback(\&wait_loop_callback, 50);

($::rootwidth, $::rootheight) = (Gtk3::Gdk::Screen::width, Gtk3::Gdk::Screen::height);
$::real_windowwidth  = $::rootwidth  > 800 ? 750 : 600;
$::real_windowheight = $::rootheight > 600 ? 500 : 400;

chomp(my $basedev = cat_('/run/mgalive/basedev'));
if ($basedev) {
    mkdir_p('/tmp/basedev');
    log::l(run_program::get_stdout('blkid', '-s', 'LABEL', $basedev));
    if (system('mount', $basedev, '/tmp/basedev') == 0) {
        log::l('ISO date: ' . cat_('/tmp/basedev/DATE.txt')) if -e '/tmp/basedev/DATE.txt';
        system('umount', '/tmp/basedev');
    }
}

{
    use diskdrake::interactive;
    package diskdrake::interactive;
    my $old = \&hd_possible_actions_base;
    undef *hd_possible_actions_base;
    *hd_possible_actions_base = sub {
	#- for the partition wizard to show the auto-allocate option
	local $::isInstall = 1;
	&$old;
    };
    undef *Done;
    #- skip the fstab/reboot checks (see below FIXME note)
    *Done = \&diskdrake_interactive_Done;
    #- don't ask whether to Move/Hide old files (FIXME: add a method to skip that to diskdrake::interactive)
    undef *need_migration;
    *need_migration = sub { 'hide' };
}

install_live();

sub install_live() {
    my $in = 'interactive'->vnew('su');
    $in->{pop_wait_messages} = 0;

    $::isWizard = 1;
    $::Wizard_no_previous = 1;
    $::Wizard_pix_up = "draklive-install";
    any::set_wm_hints_if_needed($in);

    my $all_hds = {};
    my $fstab = [];
    $::prefix = '/mnt/install';

    my $system_file = '/etc/sysconfig/draklive-install';
    my %settings = getVarsFromSh($system_file);

    my $copy_source = $settings{SOURCE} || '/';

    my $persistent = -e '/run/mgalive/persistent';

    # Don't remove packages from a persistent live system, as they will no
    # longer be available for future installs. Don't remove packages from
    # a non-persistent live system with insufficient RAM to accomodate the
    # changes that will be stored in the upper layer of the overlay file
    # system (mga#27872).
    my $remove_after_install = $persistent || ram_size_in_MB() < 750;

    display_start_message();
    init_hds($in, $all_hds, $fstab);
    ask_partitions_loop($in, $all_hds, $fstab, $copy_source);
    remove_unused_packages($in, $copy_source) if !$remove_after_install;
    prepare_root($in);
    copy_root($in, $copy_source);
    remove_unused_packages($in, $::prefix) if $remove_after_install;
    complete_install($in, $all_hds);
    setup_bootloader($in, $all_hds, $fstab);
    install_updates($in);
    finish_installation($fstab);
    display_end_message($in);
    $in->exit(0);
}

sub ram_size_in_MB() {
    my @mem_total = map { /(\d+)/ } grep { /^MemTotal:/ } cat_("/proc/meminfo");
    $mem_total[0] / 1024;
}

sub umount_all {
    my ($fstab, $o_except_swap) = @_;
    #- make sure nothing is mounted in the new root
    foreach (sort { $b cmp $a } grep { /^$::prefix/ } map { (split)[1] } cat_('/proc/mounts')) {
        system('umount', $_);
    }
    #- make sure selected devices aren't mounted, and swap isn't used
    if (!$o_except_swap) {
        foreach (grep { isSwap($_) } @$fstab) {
            eval { fs::mount::swapoff($_->{device}) };
        }
    }
    foreach (grep { $_->{isMounted} && !isSwap($_) } @$fstab) {
        system('umount', "/dev/$_->{device}");
        $_->{isMounted} = 0;
    }
}

sub on_reboot_needed {
    my ($in) = @_;
    fs::partitioning_wizard::warn_reboot_needed($in);
    $in->exit(0);
}

sub display_start_message() {
    require any;
    my $has_running_wm = to_bool(any::running_window_manager());
    local $::isStandalone = $has_running_wm; # center me if run in xsetup.d script
    mygtk3::enable_quit_popup(1);
    my $w = ugtk3->new(N("Mageia Live"));
    my $dialogue = ugtk3::gtknew('VBox', children_centered => [
                       ugtk3::gtkcreate_img("MageiaLive-install"),
                       ugtk3::gtknew('Label', height => 5),
                       ugtk3::gtknew('Label', text => N("This wizard will help you to install the live distribution.")),
                   ]);
    $dialogue->set_vexpand(1);
    ugtk3::gtkadd($w->{window},
                  ugtk3::gtknew('VBox', children_tight => [
                      $dialogue,
                      ugtk3::create_okcancel($w),
                  ]));
    $w->{ok}->grab_focus;
    $w->main;
}

sub umount_first_pass() {
    local $::prefix = undef;
    my $all_hds = fsedit::get_hds();
    fs::get_raw_hds('', $all_hds);
    fs::get_info_from_fstab($all_hds);
    my $fstab = [ fs::get::fstab($all_hds) ];
    fs::merge_info_from_mtab($fstab);

    #- inlined from fs::mount::umount_all to go on when one umount fail
    #- (maybe the sort function could be shared)
    log::l("unmounting all filesystems");
    foreach (sort { $b->{mntpoint} cmp $a->{mntpoint} } 
	       grep { $_->{mntpoint} && !$_->{real_mntpoint} } @$fstab) {
	eval { fs::mount::umount_part($_) };
	log::l("error unmounting $_->{mntpoint}: $@") if $@;
    }
}

sub init_hds {
    my ($in, $all_hds, $fstab) = @_;
    my $wait = $in->wait_message('', N("Please wait"));
    umount_first_pass();
    eval { fs::any::get_hds($all_hds, $fstab, [], {}, 'skip_mtab', $in) };

    #- fs::any::get_hds does not return mounts that are not in fstab
    my @mounted = fs::read_fstab('', '/proc/mounts');

    my $live_device = basename(cat_('/run/mgalive/basedev'));
    chomp($live_device);
    #- remove live device from the detected hds, so that bootloader is not installed on it:
    #-  bootloader installation uses first device from detect_devices::get, which tries to list devices
    #-  by booting order, and our live system is likely to be here in first position
    #- it can be either a partition (USB) or the full disk (Hybrid on USB)
    @{$all_hds->{hds}} = grep {
        $_->{device} ne $live_device &&
        !member($live_device, map { $_->{device} } partition_table::get_normal_parts_and_holes($_));
    } @{$all_hds->{hds}} if $live_device;

    #- some of the selected devices may have been manually mounted or auto-mounted, and we need to
    #- ensure they will be unmounted before we start partitioning (mga#20268)
    foreach my $p (@$fstab) {
        $p->{isMounted} = 1 if grep { $_->{device} eq $p->{device} } @mounted;
    }

    my $err = $@;
    umount_all($fstab);
    if ($err) {
        undef $wait;
        $in->ask_warn(N("Error"), [ formatError($err) ]);
        $in->exit(1);
    }
}

sub ask_partitions_loop {
    my ($in, $all_hds, $fstab, $copy_source) = @_;

    while (1) {
        eval { ask_partitions($in, $all_hds, $fstab, $copy_source) };
        my $err = $@ or last;
        $in->exit(1) if $err =~ /wizcancel/ ||
          !$in->ask_warn(N("Error"), [ N("An error occurred"), formatError($err) ]);
    }
}

sub ask_partitions {
    my ($in, $all_hds, $fstab, $copy_source) = @_;
    fs::partitioning_wizard::main($in, $all_hds, $fstab, [], undef, {}, 'skip_mtab');

    mkdir_p($::prefix) or die "unable to create $::prefix";

    # There is an unidentified condition which stops udevd from calling the
    # BLKRRPART ioctl when the "use entire disk" solution is selected. Adding
    # this udevadm settle' call appears to fix it (although it may just be the
    # extra delay that does the job). Look at removing this once we switch to
    # using libparted for all partition table types.
    system('udevadm', 'settle');

    fs::any::write_hds($all_hds, $fstab, undef, sub { on_reboot_needed($in) }, {});
    fs::any::check_hds_boot_and_root($all_hds, $fstab);
    fs::partitioning::choose_partitions_to_format($in, $fstab);

    my $total = get_total_size($in, $copy_source);
    my $available = fs::any::getAvailableSpace($fstab, 'skip_mounted', 1);
    $total += fs::any::getNeededMinSpace($available);
    die N("Not enough space available (%s available while %s are needed)",
          formatXiB($available), formatXiB($total)) . "\n"
      if $total > $available;

    umount_all($fstab);
    fs::partitioning::format_mount_partitions($in, $all_hds, $fstab);
}

sub remove_unused_packages {
    my ($in, $o_prefix) = @_;
    require pkgs;
    #in remove_unused_packages, we want to get the locale from the currently
    #running system, but we want to remove unused packages from the 
    #system based in $o_prefix, that's why we use an extra arg instead of 
    #directly using $::prefix
    local $::prefix;
    pkgs::remove_unused_packages($in, $in->do_pkgs, $o_prefix);
    run_program::rooted($o_prefix, 'urpme', '--auto', '--auto-orphans');
}

sub prepare_root {
    my ($in) = @_;
    #- create required directories and devices (early to have a consistent root before calling other programs)
    my $_wait = $in->wait_message('', N("Please wait"));
    fs::any::prepare_minimal_root();
    #- /media isn't included in the minimal root, and we don't copy it to avoid copying stale mount points
    mkdir_p("$::prefix/media");
    #- under GNOME/Xwayland, running gurpmi inside the chroot requires connection to the X11 socket in /tmp
    run_program::run('mount', '--bind', '/tmp', "$::prefix/tmp");
}

sub build_copy_command {
    my ($source, $dest) = @_;
    join(' ',
         'tar', 'c', '--one-file-system', '--exclude=./media', '--exclude=./mnt', '-C', $source, '.',
         '|',
         'tar', 'xvv', '-C', $dest,
     );
}

sub get_total_size {
    my ($in, $source) = @_;
    state %total;
    return $total{$source} if $total{$source};
    my $_wait = $in->wait_message('', N("Computing total size"));
    $total{$source} = first(split(/\s+/, run_program::get_stdout('du', '2>', '/dev/null', '-sbx', '/run/mgalive/ovlsize')));
}

sub sync_logs() {
    cp_af('/var/log', $::prefix . '/var');
    cp_f($logfile, $::prefix . '/root/drakx');
}

sub copy_root {
    my ($in, $copy_source) = @_;
    my $total = get_total_size($in, $copy_source);

    my ($wait, $update_progress) = copying_message_with_progress_bar($in, N("Copying in progress"));
    open(my $OUTPUT, '-|', build_copy_command($copy_source, $::prefix));
    {
        local $_;
        my $current = my $previous = 0;
        while (<$OUTPUT>) {
            (undef, undef, my $size) = split;
            $current += $size;
            if ($current <= $total && $current/$total > $previous/$total + 0.001) {
                $update_progress->('', $current, $total);
                $previous = $current;
            } else {
	        mygtk3::flush();
            }
        }
    }
    if (!close($OUTPUT)) {
        undef $wait;
        undef $update_progress;
        $in->ask_warn(N("Error"), N("Unable to copy files to new root"));
        $in->exit(1);
    }
    sync_logs();
}

sub clean_harddrake_hds {
    my ($prefix) = @_;
    #- remove harddisks from harddrake's config file, so that hardddisks
    #- are automatically rediscovered at first boot
    require Storable;
    my $harddrake_file = $prefix . "/etc/sysconfig/harddrake2/previous_hw";
    my $harddrake_conf = eval { Storable::retrieve($harddrake_file) };
    if ($harddrake_conf) {
        delete $harddrake_conf->{HARDDISK};
        Storable::store($harddrake_conf, $harddrake_file);
    }
}


sub complete_install {
    my ($in, $all_hds) = @_;
    my $_wait = $in->wait_message('', N("Please wait"));

    my $real_rpm_dir = "/tmp/rpm/real";
    cp_f(glob($real_rpm_dir . "/*"), $::prefix . "/var/lib/rpm") if -d $real_rpm_dir;

    #- FIXME: maybe factorize with draklive, using draklive --clean-chroot ?
    #- remove unwanted files and packages
    my $live_user = chomp_(cat_('/etc/draklive-install.d/user'));
    my $live_user_desktop = $live_user && chomp_(run_program::rooted_get_stdout($::prefix, "su - $live_user -c 'xdg-user-dir DESKTOP'"));
    unlink(map { $::prefix . $_ } '/.autofsck',
           chomp_(cat_(glob('/etc/draklive-install.d/remove.d/*'))),
           if_($live_user_desktop,
               $live_user_desktop . '/draklive-copy-wizard.desktop',
               $live_user_desktop . '/draklive-install.desktop'),
           );
    {
        #- do not allow update-menus to create home directory with invalid perms
        local $ENV{HOME} = '/root';
        system('chroot', $::prefix, 'rpm', '-e', 'draklive-install');
    }

    foreach (glob('/etc/draklive-install.d/run.d/*')) {
	    run_program::rooted($::prefix, $_);
    }

    #- copy sysconfig files for first boot
    cp_f(glob('/etc/draklive-install.d/sysconfig/*'), $::prefix . '/etc/sysconfig');

    #- unselect live user in kdm
    my $kdm_cfg = common::read_alternative('kdm4-config');
    update_gnomekderc($::prefix . $kdm_cfg,
                      'X-:0-Greeter' => (PreselectUser => 'None', DefaultUser => '')) if -f $kdm_cfg;
    my $autologin = any::get_autologin();
    delete $autologin->{user};
    any::set_autologin($in->do_pkgs, $autologin);

    #- force regeneration of initrd
    unlink($_) foreach glob("$::prefix/boot/initrd*.img");

    #- allow to install doc in disk install
    substInFile { undef $_ if /^\%_excludedocs/ } $::prefix . '/etc/rpm/macros';

    fs::write_fstab($all_hds, $::prefix);

    clean_harddrake_hds($::prefix);

    # enable back some disabled services
    require services;
    services::start_service_on_boot($_) foreach chomp_(cat_('/etc/draklive-install.d/services'));

    sync_logs();
}

sub setup_bootloader {
    my ($in, $all_hds, $fstab) = @_;
    use bootloader;
    my $bootloader = {};
    my $_wait = $in->wait_message('', N("Preparing initial startup program..."));
    any::setupBootloaderBeforeStandalone($in->do_pkgs, $bootloader, $all_hds, $fstab);
    undef $_wait;
    local $::Wizard_no_previous = 0;
    #- don't use any::setupBootloaderUntilInstalled - it creates unwanted mount
    #- points in the live system
    do {
        any::setupBootloader($in, $bootloader, $all_hds, $fstab, $ENV{SECURE_LEVEL}) or $in->exit;
    } while !any::installBootloader($in, $bootloader, $all_hds);
    sync_logs();
}

sub enable_network_connection {
    my ($in) = @_;

    #- The network service is running in the live system
    local $::prefix = undef;

    require network::tools;
    return if network::tools::has_network_connection();

    require network::netconnect;
    my $modules_conf = modules::any_conf->read;
    network::netconnect::real_main($net, $in, $modules_conf);
    $modules_conf->write;

    #- Enable network access when running in the chroot
    cp_f('/etc/resolv.conf', '/mnt/install/etc/resolv.conf');
}

sub clean_rpmdb_shared_regions {
    unlink glob("$::prefix/var/lib/rpm/__db.*");
}

sub add_online_media {
    my ($in) = @_;

    my @media_url = map { top(split(' ', $_)) } run_program::get_stdout('urpmq', '--list-url');
    my @online_media = grep { !m,^(?:file://)?/, } @media_url;
    @online_media and return 1;

    $in->ask_yesorno_(
        {
            title => N("Updates"),
            messages => formatAlaTeX(
N("You now have the opportunity to setup online media.") . "\n\n" .
N("This allows to install security updates.") . "\n\n" .
N("To setup those media, you will need to have a working Internet 
connection.

Do you want to setup the update media?")),
        },
        1
    ) or do {
        log::l("user said no to media setup");
        return 0;
    };

    require urpm;
    require urpm::media;

    my $urpm = urpm->new();
    $urpm->{log} = \&log::l;
    urpm::set_files($urpm, $::prefix);
    urpm::media::read_config($urpm);

    $in->{packages} = $urpm;
    $in->{product_id} = mageia_release_info();

    require mirror;
    require urpm::download;

    my $downloader = sub {
        my ($url) = @_;
        urpm::download::get_content($urpm, $url);
    };
    mirror::register_downloader($downloader);

    my $urpmi_options = { mirror_url => '$MIRRORLIST' };

try_again:
    enable_network_connection($in);

    any::ask_mirror_and_downloader($in, $urpmi_options);
    any::urpmi_set_downloader($in, $urpm, $urpmi_options->{downloader}) || die("Failed to set downloader\n");

    if ($urpmi_options->{mirror_url} ne '$MIRRORLIST') {
        $urpmi_options->{mirror_url} = any::ask_mirror($in, 'distrib', $urpmi_options->{mirror_url});
    }

    clean_rpmdb_shared_regions();

    if (any::urpmi_add_all_media($in, undef, $urpmi_options->{mirror_url})) {
        log::l("successfully added update media");
        return 1;
    }

    log::l("failed to add update media");
    if ($in->ask_okcancel(N("Warning"), N("Failure when adding medium") . "\n" . N("Retry?"))) {
        goto try_again;
    }
    0;
}

sub install_updates {
    my ($in) = @_;

    add_online_media($in) or return;

    $in->ask_yesorno_(
        {
            title => N("Updates"),
            messages => formatAlaTeX(
N("You now have the opportunity to download updated packages. These packages
have been updated after the distribution was released. They may
contain security or bug fixes.

To download these packages, you will need to have a working Internet 
connection.

Do you want to install the updates?")),
        },
        1
    ) or do {
        log::l("user said no to installing updates");
        return;
    };

    my $log_file = '/root/drakx/updates.log';
    run_program::raw({ root => $::prefix, timeout => 'never' }, 'gurpmi2', '>>', $log_file, '2>>', $log_file, '--auto-select');

    clean_rpmdb_shared_regions();
}

sub clean_live_system_hds() {
    #- clean fstab and harddrake config in the live system
    #- since partitions UUIDs of the installed system have been modified
    #- (useful for persistent live systems)
    local $::prefix = undef;
    clean_harddrake_hds($::prefix);
    my $all_hds = fs::get::empty_all_hds(); #- skip real harddisks
    fs::get_raw_hds('', $all_hds);
    fs::get_info_from_fstab($all_hds);
    fs::write_fstab($all_hds, $::prefix);
}

sub finish_installation {
    my ($fstab) = @_;
    #- remove the extra authorisation draklive added
    run_program::rooted($::prefix, 'sed', '-i', '/for draklive-install/d', '/etc/pam.d/polkit-1');
    #- signal to the dracut shutdown script that the Live medium should be ejected
    system('touch', '/run/mgalive/installed');
    sync_logs();
    #- cleanly umount here, it will avoid fs journals to be corrupted after a hackish reboot
    #- but leave swap space, to avoid out-of-memory error on machines with little memory
    #- draklive-install-lock-storage will unmount swap after we exit and free up some memory
    umount_all($fstab, 1);
    clean_live_system_hds();
}

sub display_end_message {
    my ($in) = @_;
    $::Wizard_finished = 1;
    $in->ask_okcancel(N("Congratulations"), N("Please halt your computer, remove your live system, and restart your computer."));
}

###
### duplicate code
###

# FIXME: code begins to fork
# FIXME: => in mga4 add diskdrake::interactive::set_skip_fstab_reboot_steps() and use it instead

#- from disdrake::interactive
{
    package diskdrake::interactive;
  sub diskdrake_interactive_Done {
    my ($in, $all_hds) = @_;
    eval { raid::verify($all_hds->{raids}) };
    if (my $err = $@) {
	$::expert or die;
	$in->ask_okcancel('', [ formatError($err), N("Continue anyway?") ]) or return;
    }
    foreach (@{$all_hds->{hds}}) {
	if (!write_partitions($in, $_, 'skip_check_rebootNeeded')) {
	    return if !$::isStandalone;
	    $in->ask_yesorno(N("Quit without saving"), N("Quit without writing the partition table?"), 1) or return;
	}
    }
    #- skip that fstab/reboot steps
    if (!$::isInstall && 0) { 
	my $new = fs::fstab_to_string($all_hds);
	if ($new ne $all_hds->{current_fstab} && $in->ask_yesorno('', N("Do you want to save /etc/fstab modifications?"), 1)) {
	    $all_hds->{current_fstab} = $new;
	    fs::write_fstab($all_hds);
	}
	update_bootloader_for_renumbered_partitions($in, $all_hds);

	if (any { $_->{rebootNeeded} } @{$all_hds->{hds}}) {
	    $in->ask_warn('', N("You need to reboot for the partition table modifications to take place"));
	    tell_wm_and_reboot();
	}
    }
    if (my $part = find { $_->{mntpoint} && !maybeFormatted($_) } fs::get::fstab($all_hds)) {
	$in->ask_okcancel('', N("You should format partition %s.
Otherwise no entry for mount point %s will be written in fstab.
Quit anyway?", $part->{device}, $part->{mntpoint})) or return if $::isStandalone && 0; #- no, please
    }
    1;
  }
}

# forked from interactive::wait_message
sub copying_message {
    my ($o, $title, $message, $b_temp) = @_;

    my $dialogue = ugtk3::gtknew('VBox', padding => 5, children_centered => [
        ugtk3::gtkcreate_img("MageiaLive-advert"),
        $message,
    ]);
    $dialogue->set_vexpand(1);
    my $w = $o->wait_messageW($title, N("Copying in progress"), $dialogue);
    push @tempory::objects, $w if $b_temp;
    my $b = before_leaving { $o->wait_message_endW($w) };

    #- enable access through set
    MDK::Common::Func::add_f4before_leaving(sub { $o->wait_message_nextW($_[1], $w) }, $b, 'set');
    $b;
}

# forked from interactive::gtk::wait_message_with_progress_bar
sub copying_message_with_progress_bar {
    my ($in, $o_title) = @_;

    my $progress = Gtk3::ProgressBar->new;
    my $w = copying_message($in, $o_title, $progress);
    my $displayed;
    $progress->signal_connect(draw => sub { $displayed = 1; 0 });
    $w, sub {
	my ($msg, $current, $total) = @_;
	if ($msg) {
	    $w->set($msg);
	}

	if ($total) {
	    $progress or internal_error('You must first give some text to display');
	    my $fraction = min(1, $current / $total);
	    if ($fraction != $progress->get_fraction) {
		$progress->set_fraction($fraction);
		$progress->show;
		$displayed = 0;
		mygtk3::flush() while !$displayed;
	    }
	} else {
	    $progress->hide;
	    mygtk3::flush();
	}
    };
}