#!/bin/bash
# Author: Steven Shiau <steven _at_ clonezilla org>
# License: GPL
# Description: This script will create a Ubuntu live CD iso which is used as a template for clonezilla image with restoration function.

#
set -e

#
DRBL_SCRIPT_PATH="${DRBL_SCRIPT_PATH:-/usr/share/drbl}"
. $DRBL_SCRIPT_PATH/sbin/drbl-conf-functions
. /etc/drbl/drbl-ocs.conf
. $DRBL_SCRIPT_PATH/sbin/ocs-functions

# ubuntu_mirror_url_def, ubuntu_mirror_security_url_def, DRBL_REPOSITORY_URL_def and DRBL_GPG_KEY_URL are loaded from drbl-ocs.conf

# debian_type can be minimal (about 67 MB for Etch)/minimal-net (about 85 MB for Etch).
# 
# Since from live-build 3.0~a55 "minimal" for debootstrap was removed. We use the option --variant of "debootstrap", i.e. "minbase" for minimal.
debian_type="minbase"
#debian_type="standard"
DEBIAN_DIST_DEF="resolute"
pkgs="$PKG_FROM_DBN_WHICH_OCS_LIVE_NEED drbl $PKG_FROM_DRBL_FOR_CLONEZILLA_LIVE"
categories_default="main restricted universe multiverse"
cpu_flavor_default="amd64"
bootstrap_default="mmdebstrap"
workdir="ubuntu-live"
# RAM as the working dir. Speed up the live system creation, but need RAM space.
use_ramfs="no"
ramfs_size_def="7516192768"  # Unit: bytes. Use for mount -t tmpfs if use_ramfs=yes

# The files in dir $ocs_live_script_dir/ will be copied to the dir /live-hook-dir in dir chroot. The file "ocs-live-hook" is in $ocs_live_script_dir
# We put some files in dir ocs_minimal_hook/ to do some jobs, like clean unnecessary files, set locales...
ocs_live_script_dir="$DRBL_SCRIPT_PATH/setup/files/ocs/live-hook"
# The script inside $ocs_live_script_dir/ will be run when chroot. There are many files in $ocs_live_script_dir/, we will just run one here.
run_hook_script="ocs-live-hook"
# This hook is for binary_local-hooks, not for chroot hook
run_binary_hook_script="efi-misc-binary-hook"
# The option to create a corresponding source image.
gen_source_tarball="no"
kernel_pkg=""
kernel_extra_pkg=""

#
check_if_root
#
prog="$(basename $0)"

# functions
USAGE() {
    echo "Usage:"
    echo "To create a Ubuntu live CD which is used a template for Clonezilla live:"
    echo "$prog [OPTION]"
    echo "OPTION:"
    echo "-a, --packages PKG     Specify to add PKG, e.g. firmware-bnx2"
    echo "-b, --branch [s|stable|t|testing|u|unstable|e|experimental]  Specify the DRBL branch to be used in Live CD. Default is stable."
    echo "-bt, --bootstrap BOOTSTRAP  Specify the bootsrap type as BOOTSTRAP (debootstrap or mmdebstrap). If not specified, $bootstrap_default will be used."
    echo "-c, --categories CAT   Sepcify the category, e.g. 'main', 'main universe', default is \'$categories_default\' if not specified."
    echo "-d, --ubuntu-dist [jammy|questing|resolute]  Assign Ubuntu dist, the default is $DEBIAN_DIST_DEF if not assigned."
    echo "-e, --ramfs-size  SIZE  Use SIZE (bytes) as the size of RAM for working dir. Default is $ramfs_size_def."
    echo "-f, --arch-flavor ARCH  Assign the CPU architecture flavor as ARCH, e.g. 386, amd64, arm64 or armhf. If it's not assigned, $cpu_flavor_default will be used."
    echo "-g, --drbl-repo-url URL  Assign the DRBL repository URL instead of default one $DRBL_REPOSITORY_URL_def."
    echo "-i, --assign-version-no NO  Assign the version no as NO instead of date."
    echo "-k, --live-kernel-pkg KERNEL_VER Assign kernel version as KERNEL_VER (KERNEL VER package must exist in repository. Ex. if KERNEL_VER is 2.6.20-1-486, then linux-image-2.6.20-1-486, squashfs-modules-2.6.20-1-486, and unionfs-modules-2.6.20-1-486 will be used."
    echo "-l, --drbl-live-ubuntu-branch [s|stable|t|testing|u|unstable|e|experimental]  specifies the DRBL live-ubuntu branch to be used in Live CD. Default is stable."
    echo "-m, --mirror-url URL  Assign the Ubuntu repository URL instead of default one $ubuntu_mirror_url_def. "
    echo "-r, --enable-ramfs    Use RAM as the working dir. This will need $ramfs_size_def bytes RAM space by default."
    echo "-s, --mirror-security-url URL  Assign the Ubuntu security repository URL instead of default one $ubuntu_mirror_security_url_def."
    echo "-o, --create-source-tarball  Create a corresponding source image to the binary image.  By default such an source image will not be created since this would require to download quite a few source packages."
    echo "-t, --batch     Run in batch mode"
    echo "-v, --verbose   Run live build in verbose mode"
}
#
build_it(){
  mkdir ${workdir}
  if [ "$use_ramfs" = "yes" ]; then
    ramfs_cmd="mount -t tmpfs -o "size=${ramfs_size}" tmpfs ${workdir}"
    eval $ramfs_cmd
    rc_ram="$?"
    if [ "$rc_ram" -ne 0 ]; then
      [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
      echo "Failed to mount RAM as working dir by this command:"
      echo "$ramfs_cmd"
      [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
      echo "$msg_program_stop!"
      exit 1
    fi
  fi
  cd ${workdir}
  
  # Force to load debian mode, or it will use ubuntu mode, which might fail in some cases.
  # E.g. tar (child): /usr/share/gfxboot-theme-ubuntu/bootlogo.tar.gz: Cannot open: No such file or directory
  $pref lb config --distribution $debian_dist --parent-distribution $debian_dist --archive-areas "$categories" --parent-archive-areas "$categories"
  $pref lb config --mode ubuntu
  
  # 2020/Mar/09 No more required this:
  # It's important to make the url for --parent-mirror-binary is different from that of --parent-mirror-chroot so that in /usr/lib/live/build/chroot_archives the "lb config --cache-packages false" and "lb config --apt-indices false" can work and those /var/cache/apt/{pkgcache.bin,srcpkgcache.bin} and those /var/lib/apt/lists/{*_Packages,*Release*,*_Sources} won't be cached.
  $pref lb config --parent-mirror-bootstrap $mirror_url --parent-mirror-binary $mirror_url --parent-mirror-chroot $mirror_url --parent-mirror-chroot-security $mirror_security_url --parent-mirror-binary-security $mirror_security_url --parent-mirror-debian-installer $mirror_url
  $pref lb config --updates true
  $pref lb config --mirror-debian-installer $mirror_url
  $pref lb config --mirror-binary $mirror_url --mirror-binary-security $mirror_security_url 
  $pref lb config --mirror-bootstrap $mirror_url
  $pref lb config --mirror-chroot $mirror_url --mirror-chroot-security $mirror_security_url
  # From live-build 3.0~a58-1, no --mirror-chroot-volatile option.
  #$pref lb config --mirror-chroot-volatile "none"
  
  # 2023/04/13 Since Ubuntu >= 23.04 removed v86d, we will add v86d in runtime, not here. This is not done in Debian-based as v86d is still in Debian repository.
  ## Since with squeeze or sid, we can use uvesafb to replace vesafb, we need v86d. Check https://bugs.launchpad.net/ubuntu/+source/v86d/+bug/189621 for more details.
  #case "$cpu_flavor" in
  #  386|amd64) pkgs="$pkgs v86d";;
  #  arm64) true;;
  #esac
  # Adding libc6-i386 for AMD64 arch. This will allow 32-bit program to run on AMD64 arch.
  if [ "$cpu_flavor" = "amd64" ]; then
    pkgs="$pkgs libc6-i386"
  fi
  
  # Disable the volatile repository. No such repository for Ubuntu.
  $pref lb config --initramfs live-boot
  # Refer to /usr/share/live/build/functions/defaults.sh for the original boot append parameters.
  # Don't be confused. It won't be appended. Therefore we have to put all required ones.
  $pref lb config --bootappend-live "boot=live union=overlay config username=user"
  # Force to add --bootappend-live-failsafe although we do not use it. This will overwrite the default values gotten
  # from the mode of Ubuntu. Otherwise it will set as "boot=casper memtest noapic noapm nodma nomce nolapic..." and 
  # the function get_live_boot_param in ocs-functions will parse wrong value of boot as boot=casper.
  $pref lb config --bootappend-live-failsafe "boot=live union=overlay config memtest noapic noapm nodma nomce nolapic nomodeset nosmp nosplash vga=normal"
  
  # Due to a bug, we have to include some essential packages otherwise it will failed in debian_type=minimal. The size difference between minimal and standard for intrepid is about 8 MB. Ref: https://bugs.launchpad.net/ubuntu/+source/cdebootstrap/+bug/189474
  if [ "$debian_type" = "minimal" -o  "$debian_type" = "minbase" ]; then
    DEBOOTSTRAP_OPTIONS="$DEBOOTSTRAP_OPTIONS --include=apt,ubuntu-keyring,gnupg,initramfs-tools"
  fi
  
  if [ "$debian_dist" = "jammy"  -o \
       "$debian_dist" = "questing"  -o \
       "$debian_dist" = "resolute" ]
  then
    # From live-build 3.0~a58-1, no --bootstrap-flavour option. We use debootstrap options now.
    # $pref lb config --bootstrap-flavour $debian_type 
    
    # If patched to support mmdebstrap, assigned it. Otherwise do not use "lb config --bootstrap" since "--bootstrap" does not exist.
    if [ "$bootstrap" = "mmdebstrap" ]; then
      $pref lb config --bootstrap mmdebstrap
    fi

    $pref lb config --debootstrap-options="${DEBOOTSTRAP_OPTIONS} --variant=$debian_type"
    # Since we might assign the package version, e.g. live-boot=3.0.1-1.drbl4.
    # If we do not adding "--no-upgrade", then 
    # in /usr/lib/live/build/chroot_live-packages it will run
    # "apt-get install live-boot" then it will be upgraded.
    $pref lb config --apt apt --apt-options "--yes --no-upgrade --allow-downgrades" --apt-recommends false
    # From live-build 3.0~a59-1, no --volatile option.
    # $pref lb config --volatile false
    # Disable the firmware packages automatically inclusion
    $pref lb config --firmware-binary false --firmware-chroot false
    $pref lb config --security true

    # This decide_MKSQUASHFS_OPTIONS function will output "export MKSQUASHFS_OPTIONS"
    decide_MKSQUASHFS_OPTIONS

    # Options for kernel package version name and flavor, take "linux-image-5.4.0-4-amd64" as an example
    # "linux-image-5.4.0-4" is assigned by "--linux-packages"
    # "amd64" is assigned by "--linux-flavours"
    $pref lb config --linux-packages "${kernel_pkg}"
    # For Uubntu 12.10+, linux-image has spilt as linux-image and linux-image-extra
    # Ref: https://lists.ubuntu.com/archives/kernel-team/2012-May/020448.html
    pkgs="$pkgs ${kernel_extra_pkg}"
  else
    echo "This distribution \"$debian_dist\" is not supported!"
    echo "Program terminated!"
    exit 1
  fi
  
  # For OS arch, we can build amd64 Ubuntu on i386 Ubuntu or vice versus.
  case "$cpu_flavor" in
    386)   os_arch="i386"
	   lnx_flavor="generic"
	   ;;
    amd64) os_arch="amd64"
	   lnx_flavor="generic"
	   ;;
    arm64) os_arch="arm64"
	   lnx_flavor="generic"
	   ;;
    armhf) os_arch="armhf"
	   # Used for kernel like: linux-image-5.4.0-9-generic-lpae_5.4.0-9.12_armhf.deb
	   lnx_flavor="generic-lpae"
	   ;;
  esac
  $pref lb config --architecture $os_arch
  
  # We force to use the generic Linux kernel, because Ubuntu's kernel package name is like:
  # linux-image-5.0.0-40-generic_5.0.0-40.44_i386.deb
  # linux-image-5.0.0-40-generic_5.0.0-40.44_armhf.deb
  # linux-image-5.4.0-9-generic-lpae_5.4.0-9.12_armhf.deb
  $pref lb config --linux-flavours $lnx_flavor
  
  # No memtest from debian, we will use the one from drbl since it's newer.
  $pref lb config --memtest none
  
  $pref lb config --debian-installer none
  $pref lb config --win32-loader false
  
  # Disable zsync, it might fail due to download files after /etc/resolv.conf is deconfigured.
  $pref lb config --zsync false
  
  # Enable cache-indices, by doing this, "apt-get upgrade" won't be run in lb chroot_sources after hook since we might assign older package version when building.
  # This is important especially when there is newer live-boot in Sid. E.g. on 2014/Apr/1 live-boot 4.0 alpha is aviailable, but we still want to keep using 3.0.1-1.drbl4. If --cache-indices is set true, live-boot is upgraded, and 4.0 is installed on the system after filesystem.squashfs is created. Then the initrd.img is re-created again, with live-boot 4.x in initrd.img. It will be inconsistent with what we want.
  $pref lb config --cache-indices true
  $pref lb config --cache-packages false
  $pref lb config --apt-indices false
  $pref lb config --apt-source-archives true
  
  # Disable the firmware included automatically. It will be too large. We will do that in hook.
  $pref lb config --firmware-binary false --firmware-chroot false
  
  #
  case "$cpu_flavor" in
    386) 
           # Default bootloaders in live-build is syslinux,grub-efi (for i386/amd64)
           # No need to run "$pref lb config --bootloaders syslinux,grub-efi"
           # //NOTE// This option "--binary-images" is for template iso only, not for Clonezilla live iso.
           $pref lb config --binary-images iso-hybrid
	   # Add those x86 only packages
	   pkgs="$pkgs $PKG_FROM_DBN_WHICH_OCS_LIVE_NEED_X86_ONLY"
	   ;;
    amd64) 
           # Default bootloaders in live-build is syslinux,grub-efi (for i386/amd64)
           # No need to run "$pref lb config --bootloaders syslinux,grub-efi"
           # //NOTE// This option "--binary-images" is for template iso only, not for Clonezilla live iso.
           $pref lb config --binary-images iso-hybrid
           $pref lb config --uefi-secure-boot enable
	   # Add those x86 only packages
	   pkgs="$pkgs $PKG_FROM_DBN_WHICH_OCS_LIVE_NEED_X86_64_ONLY"
	   ;;
    arm64) 
           $pref lb config --bootloaders grub-efi
           $pref lb config --binary-images iso
           $pref lb config --uefi-secure-boot enable
	   # Add those arm64 only packages
	   pkgs="$pkgs $PKG_FROM_DBN_WHICH_OCS_LIVE_NEED_ARM64_ONLY"
	   ;;
    armhf) 
           $pref lb config --bootloaders grub-efi
           $pref lb config --binary-images iso
	   # Add those armhf only packages
	   pkgs="$pkgs $PKG_FROM_DBN_WHICH_OCS_LIVE_NEED_ARMHF_ONLY"
	   ;;
  esac
  
  
  # Disable the firmware packages automatically inclusion
  $pref lb config --firmware-binary false --firmware-chroot false
  
  # Create a source tarball or not.
  if [ "$gen_source_tarball" = "yes" ]; then
    $pref lb config --source true
    $pref lb config --source-images tar
    # Since most of the debian packages are compressed (xz or gzip), we just use none, not the default one gzip.
    $pref lb config --compression none
  else
    $pref lb config --source false
  fi
  
  # Force to set the theme as live-build, so that /usr/lib/live/build/lb_binary_syslinux will copy /usr/share/live/build/bootloaders/isolinux/* to binary/isolinux/, which will trigger moving /live/vmlinuz-3.5.0-10-generic as /live/vmlinuz, and live/initrd.img-3.5.0-10-generic as live/initrd.img, for example. Then isolinux could boot since isolinux only work for shorter file name.
  #$pref lb config --syslinux-theme "live-build"
  
  # Ubuntu <= 14.10 uses upstart instead of sysvinit, while >=15.04 uses systemd.
  $pref lb config --initsystem systemd
  
  # Put files to be included in the chroot hook
  mkdir -p config/includes.chroot/live-hook-dir
  for i in $ocs_live_script_dir; do
    cp -pr $i/* config/includes.chroot/live-hook-dir/
  done
  cp -a /etc/drbl/{drbl.conf,drbl-ocs.conf} config/includes.chroot/live-hook-dir
  
  # Put the mirror url and settings, which we might need.
  cat <<-HOOK_APPEND_END >> config/includes.chroot/live-hook-dir/ocs-live-hook.conf
# The following settings were added before running hook" >> config/includes.chroot/live-hook-dir/ocs-live-hook.conf
debian_dist="$debian_dist"
mirror_url="$mirror_url"
drbl_ocs_live_ver="clonezilla-live-${version_no}"
HOOK_APPEND_END
  
  # Put packages list in config/package-lists/. //NOTE// Do not use file name like clonezilla-packages.list. Make it like clonezilla-packages.list.binary (for lb_binary) or clonezilla-packages.list.chroot (for lb_chroot). Otherwise lb_binary_package-lists will generate deb repository (/pool). 
  # Ref: http://lists.debian.org/debian-live/2012/07/msg00119.html
  echo "$pkgs" > config/package-lists/clonezilla-packages.list.chroot
  
  # Put hook file to be run in chroot
  cp $ocs_live_script_dir/${run_hook_script} config/hooks/live/${run_hook_script}.chroot
  
  # Put hook file to be run in the binary_local-hooks
  cp $ocs_live_script_dir/$run_binary_hook_script config/hooks/live/${run_binary_hook_script}.binary
  
  # prepare drbl source list
  # //NOTE// Use drbl-repository.list instead of drbl-repository.list.chroot because 
  # with ".chroot" it means only for chroot and it will be removed from the squashfs.
  cat << AddDRBLRepository > config/archives/drbl-repository.list
deb $DRBL_REPOSITORY_URL drbl $LIVE_REPOSITORY_SECTIONS_drbl
deb-src $DRBL_REPOSITORY_URL drbl $LIVE_REPOSITORY_SECTIONS_drbl
AddDRBLRepository
  
  # prepare drbl key
  LC_ALL=C wget -O config/archives/drbl-gpg.key $DRBL_GPG_KEY_URL
  
  # Disable apt languages and translations when creating DRBL live. This could reduce apt repository issue.
  # disable_apt_lang_translation chroot/etc/apt/apt.conf.d/99lang
  
  # Build it.
  $pref lb build
} # end of build_it

batch_mode="off"
# Parse command-line options
while [ $# -gt 0 ]; do
  case "$1" in
    -a|--packages)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              extra_pkgs="$1"
              shift
            fi
	    [ -z "$extra_pkgs" ] && USAGE && exit 1
            ;;
    -b|--branch)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              drbl_branch="$1"
              shift
            fi
	    [ -z "$drbl_branch" ] && USAGE && exit 1
            ;;
    -bt|--bootstrap)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case
              bootstrap="$1"
              shift
            fi
	    [ -z "$bootstrap" ] && USAGE && exit 1
            ;;
    -c|--categories)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              categories="$1"
              shift
            fi
	    [ -z "$categories" ] && USAGE && exit 1
            ;;
    -d|--debian-dist)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              debian_dist="$1"
              shift
            fi
	    [ -z "$debian_dist" ] && USAGE && exit 1
            ;;
    -i|--assign-version-no)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              version_no="$1"
              shift
            fi
	    [ -z "$version_no" ] && USAGE && exit 1
            ;;
    -k|--live-kernel)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              live_kernel_ver="$1"
              shift
            fi
	    [ -z "$live_kernel_ver" ] && USAGE && exit 1
            ;;
    -l|--drbl-live-branch)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              drbl_live_branch="$1"
              shift
            fi
	    [ -z "$drbl_live_branch" ] && USAGE && exit 1
            ;;
    -f|--arch-flavor)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              cpu_flavor="$1"
              shift
            fi
	    [ -z "$cpu_flavor" ] && USAGE && exit 1
            ;;
    -g|--drbl-repo-url)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              DRBL_REPOSITORY_URL="$1"
              shift
            fi
	    [ -z "$DRBL_REPOSITORY_URL" ] && USAGE && exit 1
            ;;
    -m|--mirror-url)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              mirror_url="$1"
              shift
            fi
	    [ -z "$mirror_url" ] && USAGE && exit 1
            ;;
    -s|--mirror-security-url)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              mirror_security_url="$1"
              shift
            fi
	    [ -z "$mirror_security_url" ] && USAGE && exit 1
            ;;
    -o|--create-source-tarball)
	    gen_source_tarball="yes"
            shift ;;
    -r|--enable-ramfs)
	    use_ramfs="yes"
            shift ;;
    -e|--ramfs-size)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              ramfs_size="$1"
              shift
            fi
	    [ -z "$ramfs_size" ] && USAGE && exit 1
            ;;
    -t|--batch)
	    batch_mode="on"
            shift ;;
    -v|--verbose)
	    verbose="on"
            shift ;;
    -*)     echo "${0}: ${1}: invalid option" >&2
            USAGE >& 2
            exit 2 ;;
    *)      break ;;
  esac
done

[ -z "$ramfs_size" ] && ramfs_size="$ramfs_size_def"
if [ "$use_ramfs" = "yes" ]; then
  [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
  echo "Using RAM disk with size $ramfs_size bytes for live build working dir."
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
fi

if ! type lb &>/dev/null; then
  [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  echo "This program only works in Ubuntu 7.10 or later!"
  echo "If you are running Ubuntu 7.10 or later, use 'apt-get install live-build' to install the live-build (version $lh_ver_required or later), then run $0 again."
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  exit 1
fi

[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
echo "///NOTE///"
echo "0. This program works on Debian or Ubuntu with the live-build (version $lh_ver_required or later) installed."
echo "1. Package debootstrap (version $debootstrap_ver_required or later) should work."
echo "2. If you want to create Ubuntu vivid live on Debian Wheezy, you have to make sure the file /usr/share/debootstrap/scripts/vivid exists, if not you can try to link gutsy as vivid by:"
echo "-------------------------------------"
echo "cd /usr/share/debootstrap/scripts/; ln -fs gutsy vivid"
echo "-------------------------------------"
echo "3. If you want to run this on Debian system, remember to import Ubuntu keyring. It's available on any Ubuntu mirror repository. e.g.: 'wget http://archive.ubuntu.com/ubuntu/pool/main/u/ubuntu-keyring/ubuntu-keyring_2012.05.19_all.deb' and 'dpkg -i ubuntu-keyring_2012.05.19_all.deb'"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
if [ "$batch_mode" = "no" ]; then
  echo -n "Press enter to continue... "
  read
fi

ask_and_load_lang_set en_US.UTF-8
rm -rf ${workdir}/.stage/

# Apply default settings if not assigned
[ -z "$debian_dist" ] && debian_dist="$DEBIAN_DIST_DEF"
[ -z "$categories" ] && categories="$categories_default"
[ -z "$DRBL_REPOSITORY_URL" ] && DRBL_REPOSITORY_URL="$DRBL_REPOSITORY_URL_def"
[ -z "$mirror_url" ] && mirror_url="$ubuntu_mirror_url_def"
[ -z "$mirror_security_url" ] && mirror_security_url="$ubuntu_mirror_security_url_def"
[ -z "$cpu_flavor" ] && cpu_flavor="$cpu_flavor_default"
[ -z "$bootstrap" ] && bootstrap=$bootstrap_default

# Append the extra packages
[ -n "$extra_pkgs" ] && pkgs="$pkgs $extra_pkgs"

# Kernel package
if [ "$debian_dist" = "jammy"  -o \
     "$debian_dist" = "plucky" ]; then
   case "$cpu_flavor" in
     amd64|arm64) 
	    # Ubuntu linux (18.04-25.04) use linux-modules-extra, 
	    # and only for i386, amd64 and arm64
	    # For that >= 25.10, no linux-modules-extra package anymore.
            # Ref: https://discourse.ubuntu.com/t/kernel-development-release-cadence-and-deprecation-of-linux-modules-extra/65176
            kernel_extra_pkg_prefix="linux-modules-extra"
	    ;;
     386|armhf) true;;
   esac
fi
if [ -n "$live_kernel_ver" ]; then
  kernel_pkg="linux-image-${live_kernel_ver}"
  if [ -n "$kernel_extra_pkg_prefix" ]; then
    # Use regex to selelct it like: linux-modules-extra-6.5.0-10 or linux-modules-extra-6.5.0-10-generic
    # Skip those linux-modules-extra-6.5.0-1010-oracle, linux-modules-extra-6.5.0-1007-gcp...
    # Hence depending packages like linux-modules-6.5.0-1010-oracle won't be included, either.
    kernel_extra_pkg="${kernel_extra_pkg_prefix}-${live_kernel_ver}(-|$)"
  fi
else
  kernel_pkg="linux-image"
  if [ -n "$kernel_extra_pkg_prefix" ]; then
    kernel_extra_pkg="${kernel_extra_pkg_prefix}"
  fi
fi

# If version_no is not assigned, use date (Ex. 20070409)
[ -z "$version_no" ] && version_no="$(date +%Y%m%d)"
target_iso="ubuntu-live-for-ocs-${version_no}.iso"
target_src_tarball="clonezilla-live-src-${version_no}.ubuntu.tar"
target_src_tarball_list="clonezilla-live-src-${version_no}.ubuntu.contents"
target_src_debian_live_tarball="clonezilla-live-src-${version_no}.debian-live.tar"
target_src_debian_live_tarball_list="clonezilla-live-src-${version_no}.debian-live.contents"

[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
echo "Creating an Ubuntu live cd iso which is used for clonezilla image with restoration function. The created iso will be in $target_iso" 
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
#
echo "Using Ubuntu repository from: $mirror_url"
echo "Using Ubuntu security repository from: $mirror_security_url"
echo "Using DRBL repository from: $DRBL_REPOSITORY_URL"

#
case "$drbl_branch" in
  t|testing)
     echo "Using DRBL testing branch..."
     LIVE_REPOSITORY_SECTIONS_drbl="testing"
     ;;
  u|unstable)
     echo "Using DRBL unstable branch..."
     LIVE_REPOSITORY_SECTIONS_drbl="unstable"
     ;;
  e|experimental)
     echo "Using DRBL experimental branch..."
     LIVE_REPOSITORY_SECTIONS_drbl="experimental"
     ;;
  *)
     echo "Using DRBL stable branch..."
     LIVE_REPOSITORY_SECTIONS_drbl="stable"
     ;;
esac
case "$drbl_live_branch" in
  t|testing)
     echo "Using DRBL Live Ubuntu testing branch..."
     LIVE_REPOSITORY_SECTIONS_drbl="$LIVE_REPOSITORY_SECTIONS_drbl live-ubuntu-testing"
     ;;
  u|unstable)
     echo "Using DRBL Live Ubuntu unstable branch..."
     LIVE_REPOSITORY_SECTIONS_drbl="$LIVE_REPOSITORY_SECTIONS_drbl live-ubuntu-unstable"
     ;;
  e|experimental)
     echo "Using DRBL Live Ubuntu experimental branch..."
     LIVE_REPOSITORY_SECTIONS_drbl="$LIVE_REPOSITORY_SECTIONS_drbl live-ubuntu-experimental"
     ;;
  *)
     echo "Using DRBL live Ubuntu stable branch..."
     LIVE_REPOSITORY_SECTIONS_drbl="$LIVE_REPOSITORY_SECTIONS_drbl live-ubuntu-stable"
     ;;
esac

#
if [ "$verbose" = "on" ]; then
  pref="bash -x"
  export DEBOOTSTRAP_OPTIONS="$DEBOOTSTRAP_OPTIONS --verbose"
fi

if [ -d "${workdir}" ]; then
  echo "Found dir ${workdir}, clean stale files..."
  chroot ${workdir}/chroot umount /dev/pts &>/dev/null || true
  chroot ${workdir}/chroot umount /proc &>/dev/null || true
  chroot ${workdir}/chroot umount /sys &>/dev/null || true
  ( cd ${workdir}/; lb clean )
  if mountpoint ${workdir}; then
    umount ${workdir}
  fi
  [ -d "${workdir}" -a -n "$(echo ${workdir} | grep "ubuntu-live")" ] && rm -rf ${workdir}
fi

# Use sub shell to keep the working dir
(build_it)

lb_ver="$(LC_ALL=C lb --version)"  # e.g. 3.0.5-1
if [ "$lb_ver" \> 3 ] && [ "$lb_ver" \< 4 ]; then
  # Live build version 3 
  mv -f ${workdir}/binary*.iso $target_iso
  if [ "$gen_source_tarball" = "yes" ]; then
    mv -f ${workdir}/source.debian.tar $target_src_tarball
    mv -f ${workdir}/source.debian.contents $target_src_tarball_list
    mv -f ${workdir}/source.debian-live.tar $target_src_debian_live_tarball
    mv -f ${workdir}/source.debian-live.contents $target_src_debian_live_tarball_list
  fi
else
  # Live build version 4
  mv -f ${workdir}/live-image*.iso $target_iso
  if [ "$gen_source_tarball" = "yes" ]; then
    mv -f ${workdir}/live-image-source.debian.contents $target_src_tarball_list
    mv -f ${workdir}/live-image-source.debian.tar $target_src_tarball
    mv -f ${workdir}/live-image-source.live.contents $target_src_debian_live_tarball_list
    mv -f ${workdir}/live-image-source.live.tar $target_src_debian_live_tarball
  fi
fi

# Unmount the RAM disk.
if [ "$use_ramfs" = "yes" ]; then
  if mountpoint ${workdir}; then
    umount ${workdir}
  fi
fi