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path: root/configs/releng/build.sh
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#!/usr/bin/env bash

set -e -u

iso_name=archlinux
iso_label="ARCH_$(date +%Y%m)"
iso_publisher="Arch Linux <http://www.archlinux.org>"
iso_application="Arch Linux Live/Rescue CD"
iso_version=$(date +%Y.%m.%d)
install_dir=arch
work_dir=work
out_dir=out
gpg_key=""

arch=$(uname -m)
verbose=""
script_path="$( cd -P "$( dirname "$(readlink -f "$0")" )" && pwd )"

umask 0022

_usage ()
{
    echo "usage ${0} [options]"
    echo
    echo " General options:"
    echo "    -N <iso_name>      Set an iso filename (prefix)"
    echo "                        Default: ${iso_name}"
    echo "    -V <iso_version>   Set an iso version (in filename)"
    echo "                        Default: ${iso_version}"
    echo "    -L <iso_label>     Set an iso label (disk label)"
    echo "                        Default: ${iso_label}"
    echo "    -P <publisher>     Set a publisher for the disk"
    echo "                        Default: '${iso_publisher}'"
    echo "    -A <application>   Set an application name for the disk"
    echo "                        Default: '${iso_application}'"
    echo "    -D <install_dir>   Set an install_dir (directory inside iso)"
    echo "                        Default: ${install_dir}"
    echo "    -w <work_dir>      Set the working directory"
    echo "                        Default: ${work_dir}"
    echo "    -o <out_dir>       Set the output directory"
    echo "                        Default: ${out_dir}"
    echo "    -v                 Enable verbose output"
    echo "    -h                 This help message"
    exit "${1}"
}

# Helper function to run make_*() only one time per architecture.
run_once() {
    if [[ ! -e "${work_dir}/build.${1}_${arch}" ]]; then
        "$1"
        touch "${work_dir}/build.${1}_${arch}"
    fi
}

# Setup custom pacman.conf with current cache directories and custom mirrorlist and custom architecture.
make_pacman_conf() {
    local _cache_dirs
    _cache_dirs=("$(pacman -v 2>&1 | grep '^Cache Dirs:' | sed 's/Cache Dirs:\s*//g')")
    sed -r "s|^#?\\s*CacheDir.+|CacheDir = $(echo -n "${_cache_dirs[@]}")|g" \
        "${script_path}/pacman.conf" > "${work_dir}/pacman-x86_64.conf"
    sed '
      s@/var/cache/pacman/pkg/@/var/cache/archbuild32/@
      s@Include = /etc/pacman\.d/mirrorlist$@\032@
    ' "${work_dir}/pacman-x86_64.conf" > "${work_dir}/pacman-i686.conf"
    local _conf
    for _conf in "${work_dir}/"pacman-*.conf; do
        sed -i '
          /^Architecture =/ s/=.*$/= '"${_conf##*/pacman-}"'/
          T
          s/\.conf$//
        ' "${_conf}"
    done
}

# Prepare working directory and copy custom airootfs files (airootfs)
make_custom_airootfs() {
    local _airootfs="${work_dir}/${arch}/airootfs"
    mkdir -p -- "${_airootfs}"

    if [[ -d "${script_path}/airootfs" ]]; then
        cp -af --no-preserve=ownership -- "${script_path}/airootfs/." "${_airootfs}"

        [[ -e "${_airootfs}/etc/shadow" ]] && chmod -f 0400 -- "${_airootfs}/etc/shadow"
        [[ -e "${_airootfs}/etc/gshadow" ]] && chmod -f 0400 -- "${_airootfs}/etc/gshadow"
        [[ -e "${_airootfs}/root" ]] && chmod -f 0750 -- "${_airootfs}/root"
    fi
}

# Packages (airootfs)
make_packages() {
    if [ -n "${verbose}" ]; then
        arch=${arch} mkarchiso -v -w "${work_dir}/${arch}" -C "${work_dir}/pacman-${arch}.conf" -D "${install_dir}" \
            -p "$(grep -h -v '^#' "${script_path}/packages."{both,${arch}}| sed ':a;N;$!ba;s/\n/ /g')" install
    else
        arch=${arch} mkarchiso -w "${work_dir}/${arch}" -C "${work_dir}/pacman-${arch}.conf" -D "${install_dir}" \
            -p "$(grep -h -v '^#' "${script_path}/packages."{both,${arch}}| sed ':a;N;$!ba;s/\n/ /g')" install
    fi
}

# Needed packages for x86_64 EFI boot
make_packages_efi() {
    if [ -n "${verbose}" ]; then
        arch=${arch} mkarchiso -v -w "${work_dir}/${arch}" -C "${work_dir}/pacman-${arch}.conf" -D "${install_dir}" -p "efitools" install
    else
        arch=${arch} mkarchiso -w "${work_dir}/${arch}" -C "${work_dir}/pacman-${arch}.conf" -D "${install_dir}" -p "efitools" install
    fi
}

# Copy mkinitcpio archiso hooks and build initramfs (airootfs)
make_setup_mkinitcpio() {
    local _hook
    mkdir -p "${work_dir}/${arch}/airootfs/etc/initcpio/hooks"
    mkdir -p "${work_dir}/${arch}/airootfs/etc/initcpio/install"
    for _hook in archiso archiso_shutdown archiso_pxe_common archiso_pxe_nbd archiso_pxe_http archiso_pxe_nfs archiso_loop_mnt; do
        cp "/usr/lib/initcpio/hooks/${_hook}" "${work_dir}/${arch}/airootfs/etc/initcpio/hooks"
        cp "/usr/lib/initcpio/install/${_hook}" "${work_dir}/${arch}/airootfs/etc/initcpio/install"
    done
    sed -i "s|/usr/lib/initcpio/|/etc/initcpio/|g" "${work_dir}/${arch}/airootfs/etc/initcpio/install/archiso_shutdown"
    cp /usr/lib/initcpio/install/archiso_kms "${work_dir}/${arch}/airootfs/etc/initcpio/install"
    cp /usr/lib/initcpio/archiso_shutdown "${work_dir}/${arch}/airootfs/etc/initcpio"
    cp ${script_path}/mkinitcpio.conf "${work_dir}/${arch}/airootfs/etc/mkinitcpio-archiso.conf"
    if [[ "${gpg_key}" ]]; then
      gpg --export "${gpg_key}" > "${work_dir}/gpgkey"
      exec 17<>"${work_dir}/gpgkey"
    fi
    if [ -n "${verbose}" ]; then
        ARCHISO_GNUPG_FD="${gpg_key:+17}" arch=${arch} mkarchiso -v -w "${work_dir}/${arch}" -C "${work_dir}/pacman-${arch}.conf" \
            -D "${install_dir}" \
            -r 'mkinitcpio -c /etc/mkinitcpio-archiso.conf -k /boot/vmlinuz-linux -g /boot/archiso.img' run
    else
        ARCHISO_GNUPG_FD="${gpg_key:+17}" arch=${arch} mkarchiso -w "${work_dir}/${arch}" -C "${work_dir}/pacman-${arch}.conf" \
            -D "${install_dir}" \
            -r 'mkinitcpio -c /etc/mkinitcpio-archiso.conf -k /boot/vmlinuz-linux -g /boot/archiso.img' run
    fi
    if [[ "${gpg_key}" ]]; then
      exec 17<&-
    fi
}

# Customize installation (airootfs)
make_customize_airootfs() {
    if [ -n "${verbose}" ]; then
        arch=${arch} mkarchiso -v -w "${work_dir}/${arch}" -C "${work_dir}/pacman-${arch}.conf" -D "${install_dir}" \
            -r '/root/customize_airootfs.sh' run
    else
        arch=${arch} mkarchiso -w "${work_dir}/${arch}" -C "${work_dir}/pacman-${arch}.conf" -D "${install_dir}" \
            -r '/root/customize_airootfs.sh' run
    fi
    rm "${work_dir}/${arch}/airootfs/root/customize_airootfs.sh"
}

# Prepare kernel/initramfs ${install_dir}/boot/
make_boot() {
    mkdir -p "${work_dir}/iso/${install_dir}/boot/${arch}"
    cp "${work_dir}/${arch}/airootfs/boot/archiso.img" "${work_dir}/iso/${install_dir}/boot/${arch}/archiso.img"
    cp "${work_dir}/${arch}/airootfs/boot/vmlinuz-linux" "${work_dir}/iso/${install_dir}/boot/${arch}/vmlinuz"
}

# Add other aditional/extra files to ${install_dir}/boot/
make_boot_extra() {
    if [[ -e "${work_dir}/${arch}/airootfs/boot/memtest86+/memtest.bin" ]]; then
        cp "${work_dir}/${arch}/airootfs/boot/memtest86+/memtest.bin" "${work_dir}/iso/${install_dir}/boot/memtest"
        cp "${work_dir}/${arch}/airootfs/usr/share/licenses/common/GPL2/license.txt" \
            "${work_dir}/iso/${install_dir}/boot/memtest.COPYING"
    fi
    if [[ -e "${work_dir}/${arch}/airootfs/boot/intel-ucode.img" ]]; then
        cp "${work_dir}/${arch}/airootfs/boot/intel-ucode.img" "${work_dir}/iso/${install_dir}/boot/intel_ucode.img"
        cp "${work_dir}/${arch}/airootfs/usr/share/licenses/intel-ucode/LICENSE" \
            "${work_dir}/iso/${install_dir}/boot/intel_ucode.LICENSE"
    fi
    if [[ -e "${work_dir}/${arch}/airootfs/boot/amd-ucode.img" ]]; then
        cp "${work_dir}/${arch}/airootfs/boot/amd-ucode.img" "${work_dir}/iso/${install_dir}/boot/amd_ucode.img"
        cp "${work_dir}/${arch}/airootfs/usr/share/licenses/amd-ucode/LICENSE" \
            "${work_dir}/iso/${install_dir}/boot/amd_ucode.LICENSE"
    fi
}

# Prepare /${install_dir}/boot/syslinux
make_syslinux() {
    _uname_r=$(file -b "${work_dir}/${arch}/airootfs/boot/vmlinuz-linux"| awk 'f{print;f=0} /version/{f=1}' RS=' ')
    mkdir -p "${work_dir}/iso/${install_dir}/boot/syslinux"
    for _cfg in "${script_path}/syslinux/"*.cfg; do
        sed "s|%ARCHISO_LABEL%|${iso_label}|g;
             s|%INSTALL_DIR%|${install_dir}|g" "${_cfg}" > "${work_dir}/iso/${install_dir}/boot/syslinux/${_cfg##*/}"
    done
    cp "${script_path}/syslinux/splash.png" "${work_dir}/iso/${install_dir}/boot/syslinux"
    cp "${work_dir}/${arch}/airootfs/usr/lib/syslinux/bios/"*.c32 "${work_dir}/iso/${install_dir}/boot/syslinux"
    cp "${work_dir}/${arch}/airootfs/usr/lib/syslinux/bios/lpxelinux.0" "${work_dir}/iso/${install_dir}/boot/syslinux"
    cp "${work_dir}/${arch}/airootfs/usr/lib/syslinux/bios/memdisk" "${work_dir}/iso/${install_dir}/boot/syslinux"
    mkdir -p "${work_dir}/iso/${install_dir}/boot/syslinux/hdt"
    gzip -c -9 "${work_dir}/${arch}/airootfs/usr/share/hwdata/pci.ids" > \
        "${work_dir}/iso/${install_dir}/boot/syslinux/hdt/pciids.gz"
    gzip -c -9 "${work_dir}/${arch}/airootfs/usr/lib/modules/${_uname_r}/modules.alias" > \
        "${work_dir}/iso/${install_dir}/boot/syslinux/hdt/modalias.gz"
}

# Prepare /isolinux
make_isolinux() {
    mkdir -p "${work_dir}/iso/isolinux"
    sed "s|%INSTALL_DIR%|${install_dir}|g" \
        "${script_path}/isolinux/isolinux.cfg" > "${work_dir}/iso/isolinux/isolinux.cfg"
    cp "${work_dir}/${arch}/airootfs/usr/lib/syslinux/bios/isolinux.bin" "${work_dir}/iso/isolinux/"
    cp "${work_dir}/${arch}/airootfs/usr/lib/syslinux/bios/isohdpfx.bin" "${work_dir}/iso/isolinux/"
    cp "${work_dir}/${arch}/airootfs/usr/lib/syslinux/bios/ldlinux.c32" "${work_dir}/iso/isolinux/"
}

# Prepare /EFI
make_efi() {
    mkdir -p "${work_dir}/iso/EFI/boot"
    cp "${work_dir}/x86_64/airootfs/usr/lib/systemd/boot/efi/systemd-bootx64.efi" \
        "${work_dir}/iso/EFI/boot/bootx64.efi"

    mkdir -p "${work_dir}/iso/loader/entries"
    cp "${script_path}/efiboot/loader/loader.conf" "${work_dir}/iso/loader/"

    sed "s|%ARCHISO_LABEL%|${iso_label}|g;
         s|%INSTALL_DIR%|${install_dir}|g" \
        "${script_path}/efiboot/loader/entries/archiso-x86_64-usb.conf" > \
        "${work_dir}/iso/loader/entries/archiso-x86_64.conf"

    # edk2-shell based UEFI shell
    # shellx64.efi is picked up automatically when on /
    cp /usr/share/edk2-shell/x64/Shell_Full.efi "${work_dir}/iso/shellx64.efi"
}

# Prepare efiboot.img::/EFI for "El Torito" EFI boot mode
make_efiboot() {
    mkdir -p "${work_dir}/iso/EFI/archiso"
    truncate -s 64M "${work_dir}/iso/EFI/archiso/efiboot.img"
    mkfs.fat -n ARCHISO_EFI "${work_dir}/iso/EFI/archiso/efiboot.img"

    mkdir -p "${work_dir}/efiboot"
    mount "${work_dir}/iso/EFI/archiso/efiboot.img" "${work_dir}/efiboot"

    mkdir -p "${work_dir}/efiboot/EFI/archiso"
    cp "${work_dir}/iso/${install_dir}/boot/x86_64/vmlinuz" "${work_dir}/efiboot/EFI/archiso/vmlinuz.efi"
    cp "${work_dir}/iso/${install_dir}/boot/x86_64/archiso.img" "${work_dir}/efiboot/EFI/archiso/archiso.img"

    cp "${work_dir}/iso/${install_dir}/boot/intel_ucode.img" "${work_dir}/efiboot/EFI/archiso/intel_ucode.img"
    cp "${work_dir}/iso/${install_dir}/boot/amd_ucode.img" "${work_dir}/efiboot/EFI/archiso/amd_ucode.img"

    mkdir -p "${work_dir}/efiboot/EFI/boot"
    cp "${work_dir}/x86_64/airootfs/usr/lib/systemd/boot/efi/systemd-bootx64.efi" \
        "${work_dir}/efiboot/EFI/boot/bootx64.efi"

    mkdir -p "${work_dir}/efiboot/loader/entries"
    cp "${script_path}/efiboot/loader/loader.conf" "${work_dir}/efiboot/loader/"

    sed "s|%ARCHISO_LABEL%|${iso_label}|g;
         s|%INSTALL_DIR%|${install_dir}|g" \
        "${script_path}/efiboot/loader/entries/archiso-x86_64-cd.conf" > \
        "${work_dir}/efiboot/loader/entries/archiso-x86_64.conf"

    # shellx64.efi is picked up automatically when on /
    cp "${work_dir}/iso/shellx64.efi" "${work_dir}/efiboot/"

    umount -d "${work_dir}/efiboot"
}

# Build airootfs filesystem image
make_prepare() {
    cp -a -l -f "${work_dir}/${arch}/airootfs" "${work_dir}"
    if [ -n "${verbose}" ]; then
        arch=${arch} mkarchiso -v -w "${work_dir}" -D "${install_dir}" pkglist
        arch=${arch} mkarchiso -v -w "${work_dir}" -D "${install_dir}" ${gpg_key:+-g ${gpg_key}} prepare
    else
        arch=${arch} mkarchiso -w "${work_dir}" -D "${install_dir}" pkglist
        arch=${arch} mkarchiso -w "${work_dir}" -D "${install_dir}" ${gpg_key:+-g ${gpg_key}} prepare
    fi
    rm -rf "${work_dir}/airootfs"
    # rm -rf "${work_dir}/${arch}/airootfs" (if low space, this helps)
}

# Build ISO
make_iso() {
    if [ -n "${verbose}" ]; then
        arch=${arch} mkarchiso -v -w "${work_dir}" -D "${install_dir}" -L "${iso_label}" -P "${iso_publisher}" \
            -A "${iso_application}" -o "${out_dir}" iso "${iso_name}-${iso_version}-dual.iso"
    else
        arch=${arch} mkarchiso -w "${work_dir}" -D "${install_dir}" -L "${iso_label}" -P "${iso_publisher}" \
            -A "${iso_application}" -o "${out_dir}" iso "${iso_name}-${iso_version}-dual.iso"
    fi
}

if [[ ${EUID} -ne 0 ]]; then
    echo "This script must be run as root."
    _usage 1
fi

while getopts 'N:V:L:P:A:D:w:o:g:vh' arg; do
    case "${arg}" in
        N) iso_name="${OPTARG}" ;;
        V) iso_version="${OPTARG}" ;;
        L) iso_label="${OPTARG}" ;;
        P) iso_publisher="${OPTARG}" ;;
        A) iso_application="${OPTARG}" ;;
        D) install_dir="${OPTARG}" ;;
        w) work_dir="${OPTARG}" ;;
        o) out_dir="${OPTARG}" ;;
        g) gpg_key="${OPTARG}" ;;
        v) verbose="-v" ;;
        h) _usage 0 ;;
        *)
           echo "Invalid argument '${arg}'"
           _usage 1
           ;;
    esac
done

mkdir -p "${work_dir}"

run_once make_pacman_conf

# Do all stuff for each airootfs
for arch in i686 x86_64; do
    run_once make_custom_airootfs
    run_once make_packages
done

run_once make_packages_efi

for arch in i686 x86_64; do
    run_once make_setup_mkinitcpio
    run_once make_customize_airootfs
done

for arch in i686 x86_64; do
    run_once make_boot
done

# Do all stuff for "iso"
run_once make_boot_extra
run_once make_syslinux
run_once make_isolinux
run_once make_efi
run_once make_efiboot

for arch in i686 x86_64; do
    run_once make_prepare
done

run_once make_iso