#!/usr/bin/perl

# Copyright (C) 2005 Mandriva
#                    Olivier Blin <oblin@mandriva.com>
# Copyright (C) 2017 Mageia
#
# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

use lib qw(/usr/lib/libDrakX);
use strict;
use MDK::Common;
use common;
use fs;
use modules;
use run_program;
use Getopt::Long;
use Pod::Usage;
use File::Temp;
use File::Copy qw(mv);
use IO::Handle; #- autoflush
use MDV::Draklive::Utils;
use MDV::Draklive::Live;
use MDV::Draklive::Loopback;
use MDV::Draklive::Config;
use MDV::Draklive::Storage;

###############################################################################
# Common Helper Functions
###############################################################################

sub get_langs {
    my ($live) = @_;
    uniq(
        (ref $live->{regions} ? @{$live->{regions}{$live->{settings}{region}}} : ()),
        @{$live->{system}{langs_always}}
    );
}

sub mount_system_fs {
    my ($live) = @_;
    run_('mount', '-t', 'devtmpfs', '/dev', $live->get_system_root . '/dev');
    run_('mount', '-t', 'proc', '/proc', $live->get_system_root . '/proc');
    run_('mount', '-t', 'sysfs', '/sys', $live->get_system_root . '/sys');
    run_('mount', '-t', 'debugfs', '/sys/kernel/debug/usb', $live->get_system_root . '/sys/kernel/debug/usb');
}

sub umount_system_fs {
    my ($live) = @_;
    eval { fs::mount::umount($live->get_system_root . $_) } foreach qw(/dev /proc /run /sys/kernel/debug/usb /sys);
}

sub umount_external_fs {
    my ($live) = @_;
    eval { fs::mount::umount($live->get_system_root . $_) } foreach map { "/mnt/$_" } all($live->get_system_root . "/mnt");
}

sub get_absolute_path {
    my ($live, $path) = @_;
    if (defined $path && substr($path, 0, 1) ne '/') {
        $live->{settings}{config_root} . '/' . $path;
    } else {
        $path;
    }
}

###############################################################################
# Install Phase
###############################################################################

sub install_system {
    my ($live) = @_;

    my $repository = $live->{settings}{repository} . '/' . $live->{settings}{arch};

    my $drakx_in_chroot = $repository . '/misc/drakx-in-chroot';
    my $remote_repository = $repository =~ m!^(ftp|http)://! && $1;
    if ($remote_repository) {
        my $local_drakx_in_chroot = $live->get_builddir . $live->{prefix}{build}{scripts} . '/drakx-in-chroot';
        mkdir_p(dirname($local_drakx_in_chroot));
        run_('curl', '--silent', '-o', $local_drakx_in_chroot, $drakx_in_chroot)
          or die "unable to get drakx-in-chroot from remote repository\n";
        $drakx_in_chroot = $local_drakx_in_chroot;
    }

    local %ENV = (
        %ENV,
        (map { "DRAKLIVE_" . uc($_->[0]) => $_->[1] } group_by2(%{$live->{settings}})),
        %{$live->{system}{install_env}},
    );
    $ENV{DRAKLIVE_LANGS} = join(':', get_langs($live));
    run_({ targetarch => $live->{settings}{arch} },
         'perl', $drakx_in_chroot,
         $repository,
         $live->get_system_root,
         if_($live->{system}{auto_install}, '--auto_install', $live->{settings}{config_root} . '/' . $live->{system}{auto_install}),
         if_($live->{system}{patch_install}, '--defcfg', $live->{settings}{config_root} . '/' . $live->{system}{patch_install}),
         if_($live->{system}{rpmsrate}, '--rpmsrate', $live->{settings}{config_root} . '/' . $live->{system}{rpmsrate}),
         ($live->{system}{stage2_updates} ? (map { ('--stage2-update', $live->{settings}{config_root} . '/' . $_->[0], $_->[1]) } @{$live->{system}{stage2_updates}}) : ()),
    ) or die "unable to install system chroot\n";
    post_install_system($live);
}

sub post_install_system {
    my ($live) = @_;

    my $previous_umask = umask;
    #- workaround buggy installation of directories that are not owned by any packages
    umask 022;

    mount_system_fs($live);

    #- copy resolv.conf for name resolution to work when adding media
    cp_f("/etc/resolv.conf", $live->get_system_root . "/etc/");

    #- remove previous draklive leftovers if needed
    run_({ root => $live->get_system_root }, 'urpmi.removemedia', '-a');

    foreach (@{$live->{system}{additional_media}}) {
        run_({ root => $live->get_system_root }, 'urpmi.addmedia', if_($_->{distrib}, '--distrib'), $_->{name}, $_->{path})
          or die "unable to add media from $_->{path}\n";
        @{$_->{packages} || []} or next;
        run_({ root => $live->get_system_root, targetarch => $live->{settings}{arch} },
             'urpmi', '--auto', '--no-verify-rpm', if_(!$_->{distrib}, '--searchmedia', $_->{name}), @{$_->{packages}})
          or die "unable to install packages from $_->{path}\n";
    }

    #- additional rpms may have dependencies in additional media
    if (@{$live->{system}{rpms} || []}) {
        my $rpm_tmp_dir = '/tmp/draklive_rpms';
        mkdir_p($live->get_system_root . $rpm_tmp_dir);
        cp_f((map { $live->{settings}{config_root} . '/' . $_ } @{$live->{system}{rpms}}), $live->get_system_root . $rpm_tmp_dir);
        run_({ root => $live->get_system_root, targetarch => $live->{settings}{arch} },
             'urpmi', '--auto', '--no-verify-rpm',
             map { $rpm_tmp_dir . '/' . basename($_) } @{$live->{system}{rpms}})
          or die "unable to install additional system rpms\n";
        rm_rf($live->get_system_root . $rpm_tmp_dir);
    }

    #- remove urpmi media added by drakx-in-chroot and additional media, they're unusable
    run_({ root => $live->get_system_root }, 'urpmi.removemedia', '-a');

    my $erase = join(' ', @{$live->{system}{erase_rpms} || []});
    run_({ root => $live->get_system_root, targetarch => $live->{settings}{arch} },
         'sh', '-c', "rpm -qa $erase | xargs rpm -e ") if $erase;

    run_({ root => $live->get_system_root }, 'systemctl', 'disable', $_ . '.service') foreach @{$live->{system}{disable_services}};
    run_({ root => $live->get_system_root }, 'systemctl', 'disable', $_ . '.timer') foreach @{$live->{system}{disable_timers}};

    #- make sure harddrake is run:
    #- if previous HW config file is empty, we assumes DrakX has just completed the installation
    #- (do it in chroot, or else Storable from the build box may write an incompatible config file)
    run_({ root => $live->get_system_root },
         'perl', '-MStorable', '-e', qq(Storable::store({ UNKNOWN => {} }, '/etc/sysconfig/harddrake2/previous_hw')));

    #- remove some build-machine specific configuration
    clean_system_conf_file($live, $_)
      foreach qw(/etc/mtab /etc/iftab /etc/shorewall/interfaces /etc/mdadm.conf),
        if_(!$live->{system}{skip_fstab}, '/etc/fstab');
    unlink($_) foreach map { glob($live->get_system_root . $_) } @{$live->{system}{remove_files} || []};

    if ($live->{system}{modules_conf}) {
        local $::prefix = $live->get_system_root;
        local *modules::write_preload_conf = sub {}; #- FIXME, make this an option
        my $modules_conf = modules::any_conf->vnew;
        put_in_hash($modules_conf, $live->{system}{modules_conf});
        $modules_conf->write;
    }

    my $mount_options = $live->{media}->get_media_setting('mount_options') || "defaults";
    output_with_perm($live->get_system_root . '/etc/fstab', 0644,
                     $live->{mount}{overlay}
                     ? "none / $live->{mount}{overlay} $mount_options 0 0\n"
                     : $live->{media}->get_media_setting('source') . " / " . $live->{media}->get_media_setting('fs') . " $mount_options 1 1\n"
                 ) unless $live->{system}{skip_fstab};

    #- interactive mode can lead to race in initscripts
    #- (don't use addVarsInSh from MDK::Common, it breaks shell escapes)
    substInFile { s/^PROMPT=.*/PROMPT=no/ } $live->get_system_root . '/etc/sysconfig/init';

    configure_draklive_resize($live);

    if ($live->{system}{preselect_kdm_user}) {
        #- preselect specified user in kdm
        my $kdm_cfg = $live->get_system_root . '/etc/kde/kdm/kdmrc';
        update_gnomekderc($kdm_cfg, 'X-:0-Greeter' => (PreselectUser => 'Default', DefaultUser => $live->{system}{preselect_kdm_user})) if -f $kdm_cfg;
    }

    #- apply patches and install files after the configuration is cleaned
    #- to allow special configuration files (especially modprobe.preload)
    foreach (@{$live->{system}{patches}}) {
        my $patch = $live->{settings}{config_root} . '/' . $_;
        my @args = ('-p0', '-d', $live->get_system_root, '-i', $patch);
        run_program::run('patch', '>', '/dev/null', '--dry-run', '-f', '-R', @args) || run_('patch', @args)
            or die "unable to apply patch " . $patch . "\n";
    }

    copy_files_to($live, $live->{system}{files}, $live->get_system_root);
    my @no_install_files = map { $_->[1] } grep { $_->[2] && $_->[2]{no_install} } @{$live->{system}{files}};
    output_p($live->get_system_root . '/etc/draklive-install.d/remove.d/draklive', map { "$_\n" } @no_install_files);

    eval { rm_rf($live->get_builddir . $live->{prefix}{build}{files}) };
    mkdir_p($live->get_builddir . $live->{prefix}{build}{files});
    if ($live->{media}{files}) {
        copy_files_to($live, $live->{media}{files}, $live->get_builddir . $live->{prefix}{build}{files});
    }
    remove_files_from($live->{media}{remove_files}, $live->get_builddir . $live->{prefix}{build}{files});

    run_({ targetarch => $live->{settings}{arch} },
         "chroot", $live->get_system_root, "bash", "-c", $live->{system}{postInstall}) if $live->{system}{postInstall};

    clean_system_conf_file($live, "/etc/resolv.conf");
    write_dist_lists($live);

    umount_system_fs($live);

    umask $previous_umask;
}

sub configure_draklive_resize {
    my ($live) = @_;

    my $resizable_loopback = find { $_->{min_size} } @{$live->{mount}{dirs} || []};
    if ($resizable_loopback) {
        my $media_loopbacks = $live->get_media_prefix('loopbacks');
        my $ext = $loop_types{$resizable_loopback->{type}}{extension};
        output($live->get_system_root . '/etc/sysconfig/draklive-resize', <<EOF);
DRAKLIVE_RESIZE=yes
LOOPBACK=$live->{prefix}{live}{mnt}$live->{prefix}{media}{mnt}${media_loopbacks}$resizable_loopback->{path}$ext
TYPE=$resizable_loopback->{fs}
MIN_SIZE=$resizable_loopback->{min_size}
MOUNT=$live->{prefix}{live}{mnt}$resizable_loopback->{mountpoint}_resized
OLD_MOUNT=$live->{prefix}{live}{mnt}$resizable_loopback->{mountpoint}
UNION=/
EOF
    }
}

sub copy_files_to {
    my ($live, $files, $root) = @_;
    foreach (@$files) {
        my ($source, $dest, $o_opts) = @$_;
        $dest = $root . '/' . $dest;
        mkdir_p($dest =~ m|/$| ? $dest : dirname($dest));
        my @sources = MDV::Draklive::Utils::glob__($live->{settings}{config_root} . '/' . $source);
        print STDERR "copying @sources to $dest\n";
        cp_af(@sources, $dest);
        my $o_perm = $o_opts && $o_opts->{mode};
        chmod $o_perm, $dest if $o_perm;
    }
}

sub remove_files_from {
    my ($files, $root) = @_;
    run_('find', $root, '(', join_lists('-o', map { [ '-name', $_ ] } @$files), ')', '-exec', 'rm', '-r', '{}', ';')
      if $files && @$files;
}

sub join_lists {
    my ($separator, $head, @lists) = @_;
    @{$head || []}, map { $separator, @$_ } @lists;
}

sub clean_system_conf_file {
    my ($live, $file) = @_;
    substInFile { undef $_ if /^[^#]/ } $live->get_system_root . $file;
}

sub write_dist_lists {
    my ($live) = @_;

    my $lists_dir = $live->get_builddir . $live->{prefix}{build}{dist};
    mkdir_p($lists_dir);

    run_("chroot " . $live->get_system_root . " rpm -qa | sort > " .
         $lists_dir . '/' . $live->get_name . '.lst');

    run_("chroot " . $live->get_system_root . " rpm -qa --qf '%{name}\n' | sort > " .
         $lists_dir . '/' . $live->get_name . '.lst.names');

    run_("chroot " . $live->get_system_root .
           qq( sh -c "rpm -qa --qf '[%{NAME} %{FILESIZES} %{FILESTATES}\n]' | awk '{if(\\\$3==0) {s[\\\$1]+=\\\$2}} END{for (p in s){print s[p],p}}' | sort -n" > ) .
         $lists_dir . '/' . $live->get_name . '.lst.full');

    run_("chroot " . $live->get_system_root .
           qq( sh -c "urpmi_rpm-find-leaves | xargs rpm -q --qf '[%{NAME} %{FILESIZES} %{FILESTATES}\n]' | awk '{if(\\\$3==0) {s[\\\$1]+=\\\$2}} END{for (p in s){print s[p],p}}' | sort -n" > ) .
         $lists_dir . '/' . $live->get_name . '.lst.leaves');

    require lang;
    my @live_langs = get_langs($live);
    my @langs = grep { member($_, @live_langs) || member(lang::locale_to_main_locale($_), @live_langs) } lang::list_langs();
    my $langs_file = $lists_dir . '/' . $live->get_name . '.langs';
    output_p($langs_file, map { lang::l2name($_) . " (" . $_ . ")\n" } sort(@langs));
}

###############################################################################
# Loop Phase
###############################################################################

sub create_loopback_files {
    my ($live) = @_;
    # umount filesystem in the live before creating the loopback
    umount_external_fs($live);
    umount_system_fs($live);

    my @excluded_files = expand_file_list($live, @{$live->{loopbacks}{exclude}{files} || []});
    my @modules_files = expand_file_list($live, @{$live->{loopbacks}{modules} || []});

    foreach (grep { exists $loop_types{$_->{type}}{build} } @{$live->{mount}{dirs} || []}) {
        local $_->{exclude} = [ @excluded_files, @modules_files ];
        $loop_types{$_->{type}}{build}->($live, $_);
    }

    foreach my $module (list_loopback_modules($live)) {
        my $copy_tree = $live->get_system_root . "/tmp/draklive/loop/$module->{name}";
        eval { rm_rf($copy_tree) };
        hardlink_filtered($live->get_system_root, $copy_tree, $module->{files});
        my $loop = $loop_types{$module->{type}};
        $loop->{build}->($live, { path => "$live->{prefix}{build}{modules}/$module->{name}", root => $copy_tree, exclude => \@excluded_files });
        eval { rm_rf($copy_tree) };
    }

    if (@excluded_files) {
        my $excluded_tree = $live->get_system_root . "/tmp/draklive/excluded/all";
        eval { rm_rf($excluded_tree) };
        hardlink_filtered($live->get_system_root, $excluded_tree, \@excluded_files);

        foreach my $module (list_loopback_modules($live)) {
            my $copy_tree = $live->get_system_root . "/tmp/draklive/excluded/$module->{name}";
            eval { rm_rf($copy_tree) };
            hardlink_filtered($excluded_tree, $copy_tree, $module->{files});
            my $loop = $loop_types{$module->{type}};
            $loop->{build}->($live, { path => "$live->{prefix}{build}{modules}/excluded-$module->{name}", root => $copy_tree });
            eval { rm_rf($copy_tree) };
        }

        my $loop = $loop_types{$live->{loopbacks}{exclude}{type}};
        $loop->{build}->($live, { path => "/excluded", root => $excluded_tree, exclude => \@modules_files });

        eval { rm_rf($excluded_tree) };
    }
}

sub expand_file_list {
    my ($live, @files) = @_;
    map {
        $_->{path} ?
          $_->{path} :
          chomp_(cat_(glob(($_->{rooted} && $live->get_system_root) . $_->{source})));
    } @files;
}

#- hardlink recursively file list to a directory
sub hardlink_filtered {
    my ($src, $dest, $files) = @_;
    mkdir_p($dest);
    my $pwd = $ENV{PWD};
    chdir($src);
    my $list_file = tmpnam();
    output_p($list_file, map { "$_\n" } grep { -e $src . $_ } @$files);
    #- cpio -pldm won't copy recursively, use rsync -r instead
    system('rsync', '-ar', '--files-from=' . $list_file, '--link-dest=' . $src, $src, $dest);
    unlink $list_file;
    chdir($pwd);
}

sub list_loopback_modules {
    my ($live) = @_;
    map {
        my $l = $_;
        map {
            my $list = $_;
            my $name = basename($list);
            $name =~ s/\.[^.]+$//;
            { type => $l->{type}, name => $name, files => [ expand_file_list($live, { source => $list }) ] };
        } glob(($_->{rooted} && $live->get_system_root) . $_->{source});
    } @{$live->{loopbacks}{modules}};
}

sub list_selected_loopbacks {
    my ($live) = @_;
    my @pack = $live->{settings}{pack} ? @{$live->{packs}{$live->{settings}{pack}} || []} : ();
    my @pack_modules = grep { member($_->{name}, @pack) } list_loopback_modules($live);
    (map { $loop_types{$_->{type}}{is_loopback} && $_->{path} ? $_->{path} . $loop_types{$_->{type}}{extension} : () } @{$live->{mount}{dirs} || []}),
    (map { $live->{prefix}{build}{modules} . '/' . $_->{name} . $loop_types{$_->{type}}{extension} } @pack_modules);
}

###############################################################################
# Boot Phase
###############################################################################

sub prepare_bootloader {
    my ($live) = @_;
    create_initrd($live);
    create_bootloader($live);
}

sub create_initrd {
    my ($live) = @_;
    my $root = $live->get_system_root;

    my $kernel = $live->find_kernel;
    print "using kernel $kernel->{version}\n";

    my $initrd = $root . '/boot/' . $live->get_initrd_name;
    unlink($initrd);

    mount_system_fs($live);
    {
        my $bootloader = {};
        local $::prefix = $root;
        bootloader::add_kernel($bootloader, $kernel, { label => 'linux', vga => $live->{system}{vga_mode} }, '', $live->{system}{no_initrd});
    }
    umount_system_fs($live);

    my $boot_dir = $live->get_builddir . $live->{prefix}{build}{boot};
    mkdir_p($boot_dir);
    mv($initrd, $boot_dir . '/initrd.gz') or die "cannot move initrd: $!\n";
}

sub create_bootloader {
    my ($live) = @_;

    my $boot_dir = $live->get_builddir . $live->{prefix}{build}{boot};
    mkdir_p($boot_dir);

    my $kernel = $live->find_kernel->{version};
    my $vmlinuz = $live->get_system_root . '/boot/vmlinuz-' . $kernel;
    -e $vmlinuz or die "cannot find kernel $kernel in root system\n";
    cp_f($vmlinuz, $boot_dir . '/vmlinuz');

    my $grub2_dir = $boot_dir . '/grub2';
    mkdir_p($grub2_dir);

    my $font = get_absolute_path($live, $live->{media}{bootloader_font});
    if (defined $font) {
        -e $font or die "cannot find bootloader font file $font\n";
    } else {
        $font = '/usr/share/grub/unicode.pf2';
    }
    if (-e $font) {
        my $fonts_dir = $grub2_dir . '/fonts';
        mkdir_p($fonts_dir);
        cp_f($font, $fonts_dir);
    }

    my $theme = get_absolute_path($live, $live->{media}{bootloader_theme});
    if (defined $theme) {
        -d $theme or die "cannot find bootloader theme directory $theme\n";
    } else {
        $theme = '/boot/grub2/themes/maggy';
    }
    my $theme_name = basename($theme);
    my @theme_fonts;
    if (-d $theme) {
        my $themes_dir = $grub2_dir . '/themes';
        mkdir_p($themes_dir);
        cp_f($theme, $themes_dir);
        @theme_fonts = map { basename($_) } glob("$theme/*.pf2");
    }

    my $add_lang_menu = defined $live->{media}{bootloader_langs};
    if ($add_lang_menu) {
        my $lang_names = get_absolute_path($live, $live->{media}{bootloader_langs});
        -e $lang_names or die "cannot find bootloader language file $lang_names\n";
        my @langs = eval(cat_($lang_names)) or die "error in language name file $lang_names\n";
        MDK::Common::File::output_utf8($grub2_dir . '/lang-menu.cfg', build_lang_menu_cfg(@langs));

        my $locale_dir = $grub2_dir . '/locale';
        mkdir_p($locale_dir);

        my $messages = get_absolute_path($live, $live->{media}{bootloader_messages});
        -d $messages or die "cannot find bootloader messages directory $messages\n";
        cp_f(glob($messages . '/*.mo'), $locale_dir);
    }

    my $eltorito_img = get_absolute_path($live, $live->{media}{eltorito_img});
    if (defined $eltorito_img) {
        -e $eltorito_img or die "cannot find Eltorito boot image $eltorito_img\n";
        cp_f($eltorito_img, $grub2_dir . '/eltorito.img');
    } else {
        build_grub2_eltorito_img($live, $grub2_dir . '/eltorito.img');
    }

    my $label = $live->{media}->get_media_label;

    my $grub2_cfg = $grub2_dir . '/grub.cfg';
    if (defined $live->{media}{grub2_cfg}) {
        my $grub_cfg_template = get_absolute_path($live, $live->{media}{grub2_cfg});
        -e $grub_cfg_template or die "cannot find grub2 config file $grub_cfg_template\n";
        cp_f($grub_cfg_template, $grub2_cfg);
        run_("sed", "-i", "s/VOLUME_LABEL/$label/g", $grub2_cfg);
    } else {
        output($grub2_cfg, build_grub2_cfg($live, $theme_name, \@theme_fonts, $add_lang_menu));
    }

    my $title = $label;
    $title =~ s/-/ /gr;

    my $base_theme_txt = $grub2_dir . "/themes/$theme_name/theme.txt";
    if (-e $base_theme_txt) {
        run_('sed', '-i', qq(s/title-text:.*/title-text: "$title"/), $base_theme_txt);
    }

    return if $live->{settings}{arch} ne 'x86_64';

    my $efi_root_dir = $live->get_builddir . $live->{prefix}{build}{EFI};
    my $efi_boot_dir = $efi_root_dir . '/BOOT';
    mkdir_p($efi_boot_dir);

    my $bootx64_efi = get_absolute_path($live, $live->{media}{bootx64_efi});
    if (defined $bootx64_efi) {
        -e $bootx64_efi or die "cannot find EFI boot image $bootx64_efi\n";
        cp_f($bootx64_efi, $efi_boot_dir . '/bootx64.efi');
    } else {
        build_grub2_bootx64_efi($live, $efi_boot_dir . '/bootx64.efi');
    }

    output($efi_boot_dir . '/grub.cfg', build_uefi_grub2_cfg($live));

    if (-e $base_theme_txt) {
        my $uefi_theme_txt = $grub2_dir . "/themes/$theme_name/theme-uefi.txt";
        cp_f($base_theme_txt, $uefi_theme_txt);
        run_('sed', '-i', qq(s/title-text:.*/title-text: "$title (UEFI)"/), $uefi_theme_txt);
    }

    my $images_dir = $live->get_builddir . $live->{prefix}{build}{images};
    mkdir_p($images_dir);

    my $esp_image = $images_dir . '/esp.img';
    eval { rm_rf($esp_image) };
    run_("/sbin/mkdosfs", "-F12", "-C", $esp_image, "4096");
    run_("mcopy", "-s", "-i", $esp_image, $efi_root_dir, "::");
}

sub build_grub2_eltorito_img {
    my ($live, $output) = @_;

    my @modules = qw(biosdisk iso9660 fat part_msdos all_video font png gfxterm gfxmenu linux
                     configfile echo gettext ls search test);

    run_('grub2-mkimage',
        '--output', $output,
        '--prefix', $live->get_media_prefix('boot') . '/grub2',
        '--format', 'i386-pc-eltorito',
        @modules
    );
}

sub build_grub2_bootx64_efi {
    my ($live, $output) = @_;

    my @modules = qw(iso9660 fat part_msdos all_video font png gfxterm gfxmenu linux
                     configfile echo gettext ls search test);

    run_('grub2-mkimage',
        '--output', $output,
        '--prefix', $live->get_media_prefix('EFI') . '/BOOT',
        '--format', 'x86_64-efi',
        @modules
    );
}

sub build_grub2_cfg {
    my ($live, $theme_name, $theme_fonts, $add_lang_menu) = @_;

    my @loadfonts;
    if (defined $theme_name) {
        @loadfonts = map { "loadfont \$prefix/themes/$theme_name/$_" } @$theme_fonts;
    }

    my @langs = get_langs($live);
    my $default_lang = $langs[0] || 'en_US';
    my $gettext = $add_lang_menu ? '$' : '';

    my $boot_dir = $live->get_media_prefix('boot');

    join("\n",
        "search --no-floppy --set=root -l '" . $live->{media}->get_media_label . "'",
        "set prefix=(\$root)" . $live->get_media_prefix('boot') . "/grub2",
        "",
        "if loadfont \$prefix/fonts/unicode.pf2 ; then",
        "    set gfxmode=1024x768,800x600,auto",
        "    set gfxpayload=keep",
        "    terminal_output gfxterm",
        "fi",
        "",
        if_($theme_name,
            "if [ x\$uefi == 'xtrue' ] ; then",
            "    set theme=\$prefix/themes/$theme_name/theme-uefi.txt",
            "else",
            "    set theme=\$prefix/themes/$theme_name/theme.txt",
            "fi",
            "export theme",
            @loadfonts,
        ),
        "",
        "set default=" . get_bootloader_default($live),
        "set timeout=" . get_bootloader_timeout($live),
        "",
        if_($add_lang_menu,
            "if [ -z \$lang ] ; then",
            "    set lang=$default_lang",
            "fi",
            "export lang",
            "",
            "submenu $gettext\"Language [\$lang]\" {",
            "    source \$prefix/lang-menu.cfg",
            "}",
            "",
        ),
        (map {
            my ($name, $cmdline) = @$_;
            join("\n",
                "menuentry $gettext\"$name\" {",
                "    linux $boot_dir/vmlinuz " . get_default_append($live) . if_($cmdline, " $cmdline"),
                "    initrd $boot_dir/initrd.gz",
                "}"
            );
         } group_by2(@{$live->{media}{bootloader_entries}})),
        "",
    );
}

sub get_bootloader_default {
    my ($live) = @_;
    defined $live->{media}{bootloader_default} ? $live->{media}{bootloader_default} : 0;
}

sub get_bootloader_timeout {
    my ($live) = @_;
    defined $live->{media}{bootloader_timeout} ? $live->{media}{bootloader_timeout} : 4;
}

sub get_default_append {
    my ($live) = @_;
    my $append = $live->{system}{append};
    join(" ",
         "root=mgalive:LABEL=" . $live->{media}->get_media_label,
         "lang=\$lang",
         if_($append, $append),
         if_($live->{system}{vga_mode} && $append !~ /\bvga=\b/,
             "vga=" . $live->{system}{vga_mode}),
    );
}

sub build_lang_menu_cfg {
    my ($langs) = @_;
    join("\n",
        "function set_language {",
        "    set lang=\$1",
        "    configfile \$prefix/grub.cfg",
        "}",
        "",
        "set default=\$lang",
        "set timeout=-1",
        "",
        (map {
            my ($id, $name) = @$_;
            "menuentry '$name' --id $id { set_language $id }";
         } group_by2(@$langs)),
        "",
    );
}

sub build_uefi_grub2_cfg {
    my ($live) = @_;
    join("\n",
        "search --no-floppy --set=root -l '" . $live->{media}->get_media_label . "'",
        "set prefix=(\$root)" . $live->get_media_prefix('boot') . "/grub2",
        "",
        "set uefi=true",
        "export uefi",
        "",
        "configfile \$prefix/grub.cfg",
        "",
    );
}

###############################################################################
# Master Phase
###############################################################################

sub create_master {
    my ($live) = @_;

    if (my $create = $live->{media}->get_storage_setting('create')) {
        $create->($live);
    } else {
        warn "not implemented yet\n";
    }
}

sub create_iso_master {
    my ($live) = @_;

    my $label = $live->{media}->get_media_label or die "the source device must be described by a label\n";

    my $mbr_image = get_absolute_path($live, $live->{media}{mbr_boot_img}) // '/usr/lib/grub/i386-pc/boot_hybrid.img';
    -e $mbr_image or die "cannot find MBR boot image $mbr_image\n";

    my $esp_image = $live->get_builddir . $live->{prefix}{build}{images} . '/esp.img';
    -e $esp_image or die "cannot find ESP image $esp_image\n";

    my $dest = $live->get_builddir . $live->{prefix}{build}{dist} . '/' . $live->get_name . '.iso';
    mkdir_p(dirname($dest));

    build_iso_image(
        $live,
        $dest,
        $label,
        $mbr_image,
        $esp_image,
        $live->get_media_prefix('boot') . '=' . $live->get_builddir . $live->{prefix}{build}{boot},
        if_($live->{settings}{arch} eq 'x86_64',
            $live->get_media_prefix('EFI')  . '=' . $live->get_builddir . $live->{prefix}{build}{EFI},
        ),
        (
            map {
                $live->get_media_prefix('loopbacks') . $_ .
                '=' .
                $live->get_builddir . $live->{prefix}{build}{loopbacks} . $_;
            } list_selected_loopbacks($live)
        ),
        if_($live->{media}{files},
            map {
                $_ . '=' . $live->get_builddir . $live->{prefix}{build}{files} . '/' . $_;
            } all($live->get_builddir . $live->{prefix}{build}{files})
        ),
    );
}

sub build_iso_image {
    my ($live, $dest, $label, $mbr_image, $esp_image, @opts) = @_;

    my $boot = $live->get_media_prefix('boot');
    my $EFI  = $live->get_media_prefix('EFI');

    run_('xorrisofs',
            '-pad', '-l', '-R', '-J',
            '-V', $label,
            '-graft-points',
            '-hide-rr-moved',
            '--sort-weight', 0, '/',
            '--sort-weight', 1, $boot,
            # for hybrid MBR boot
            '--grub2-mbr', $mbr_image,
            '-b', "$boot/grub2/eltorito.img",
            '-no-emul-boot',
            '-boot-load-size', 4,
            '-boot-info-table',
            '--grub2-boot-info',
            if_($live->{settings}{arch} eq 'x86_64',
                # for DVD UEFI boot
                '-eltorito-alt-boot',
                '-e', "$EFI/BOOT/bootx64.efi",
                '-no-emul-boot',
                # for USB UEFI boot
                '-part_like_isohybrid',
                '-iso_mbr_part_type', '0x00',
                '-append_partition', 2, '0xef', $esp_image,
            ),
            if_($dest, '-o', $dest),
            @opts,
    ) or die "unable to run xorrisofs\n";
    if ($dest) {
        my $dir = dirname($dest);
        my $filename = basename($dest);
        run_('mgaiso-addmd5', '>', '/dev/null', '2>', '/dev/null', $dest);
        run_({ chdir => $dir }, 'md5sum', '>', $dest . '.md5', $filename);
        run_({ chdir => $dir }, 'sha1sum', '>', $dest . '.sha1', $filename);
        run_({ chdir => $dir }, 'sha512sum', '>', $dest . '.sha512', $filename);
        run_({ chdir => $dir }, 'date', '>', $dir . '/DATE.txt');
        if (my $suffix = $live->get_set_suffix) {
            if (my ($prefix, $ext) = $dest =~ /(.*)(\.[^.]+)$/) {
                my $link = $prefix . $suffix . $ext;
                linkf($dest, $link);
                print "linked as $link\n";
            }
        }
    }
}

###############################################################################
# Clean Phase
###############################################################################

sub clean {
    my ($live) = @_;
    # umount filesystem in the live before cleaning
    umount_external_fs($live);
    umount_system_fs($live);
    rm_rf($_) foreach grep { -e $_ } $live->get_builddir, $live->get_system_root;
}

###############################################################################
# Main Program
###############################################################################

my @actions = (
    { name => 'dump-config', do => \&MDV::Draklive::Config::dump_config },
    { name => 'clean', do => \&clean },
    { name => 'install', do => \&install_system },
    { name => 'post-install', do => \&post_install_system },
    { name => 'initrd', do => \&create_initrd },
    { name => 'boot', do => \&prepare_bootloader },
    { name => 'loop', do => \&create_loopback_files },
    { name => 'master', do => \&create_master },
);
my @all = qw(install boot loop master);

die "you must be root to run this program\n" if $>;

my $live_object = 'MDV::Draklive::Live'->new;
my $config_root = $MDV::Draklive::Config::default_config_root;
my $config_path = $MDV::Draklive::Config::default_config_path;
my $settings_path = $MDV::Draklive::Config::default_settings_path;
GetOptions(
    "help" => sub { Pod::Usage::pod2usage('-verbose' => 1) },
    "all" => sub { $_->{to_run} = 1 foreach grep { member($_->{name}, @all) } @actions },
    (map { $_->{name} => \$_->{to_run} } @actions),
    "all-regions" => sub { $live_object->{all_regions} = 1 },
    "config-root=s" => \$config_root,
    "config=s" => \$config_path,
    "settings=s" => \$settings_path,
    "define=s" => \%{$live_object->{settings}},
) or Pod::Usage::pod2usage();

require standalone;
    every { !$_->{to_run} } @actions and Pod::Usage::pod2usage();
    MDV::Draklive::Config::read_config($live_object, $config_root, $config_path, $settings_path);
    MDV::Draklive::Config::check_config($live_object);
    MDV::Draklive::Config::complete_config($live_object);
    foreach my $region ($live_object->{all_regions} ? sort(keys %{$live_object->{regions}}) : $live_object->{settings}{region}) {
        $region and print qq(=== proceeding with region "$region"\n);
        $live_object->{settings}{region} = $region;
        foreach (grep { $_->{to_run} } @actions) {
            print qq(* entering step "$_->{name}"\n);
            $_->{do}->($live_object);
            print qq(* step "$_->{name}" done\n);
        }
    }

__END__

=head1 NAME

draklive - A live distribution mastering tool

=head1 SYNOPSIS

draklive [options]

 Options:
   --help            long help message

   --install         install selected distribution in chroot
   --boot            prepare initrd and bootloader files
   --loop            build compressed loopback files
   --master          build master image

   --all             run all steps, from installation to mastering

   --clean           clean installation chroot and work directory

   --initrd          build initrd only
   --post-install    run post install only (rpms and patches installation)

   --config-root <dir>
                     root directory containing config files and additionnal files
                     defaults to current directory if it contains a configuration file
                     else, "/etc/draklive" is used

   --config <file>   use this configuration file as live description
                     defaults to "config/live.cfg"

   --settings <file> use this file as live settings (key=value format)
                     defaults to "config/settings.cfg"
   --define key=value
                     set setting "key" to "value"
                     takes precedence over values from a settings file

   --all-regions     proceed with all configured regions

Examples:

 draklive --clean

 draklive --all

 draklive --config config/live.cfg --install

=head1 OPTIONS

=over 8

=item B<--config>

Makes draklive use the next argument as a configuration file.
This file should contain an hash describing the live distribution,
meaning the system (chroot and boot), media (usb, cdrom, nfs),
and mount type (simple R/W union, union with squash files).

Here's a configuration sample:

  {
    settings {
        repository => '/mnt/ken/2006.0',
        root => '/chroot/live-move',
    },
    system => {
        kernel => '2.6.12-12mdk-i586-up-1GB',
        auto_install => 'config/auto_inst.cfg.pl',
        patch_install => 'config/patch-2006-live.pl',
        rpmsrate => 'config/rpmsrate',
        rpms => [
             'rpms/unionfs-kernel-2.6.12-12mdk-i586-up-1GB-1.1.1.1.20051124.1mdk-1mdk.i586.rpm'
        ],
        patches => [
             'patches/halt.loopfs.patch',
        ],
        vga_mode => 788,
        no_initrd => 0,
    },
    media => {
        storage => 'iso',
    },
    mount => $predefined{mounts}{squash_union}
  };

=item B<--settings>

Makes draklive load the next argument as a file in key=value format
into the $live->{settings} hash ($live being the global live configuration hash).

Built-in keys:
  arch: build architecture
  builddir: directory hosting build files (initrd, loopbacks, images)
  chroot: directory hosting chrooted installations
  region: use the matching set of langs from the regions configuration hash
  repository: path to the Mandriva distribution repository (ftp/http/local)

Example keys:
  desktop
  media
  product

=back

=head1 DESCRIPTION

B<draklive> builds a live distribution according to a
configuration file, creates a master image,
and optionally installs it on a device.

See L<http://qa.mandriva.com/twiki/bin/view/Main/DrakLive>

=head1 AUTHOR

Olivier Blin <oblin@mandriva.com>

=cut