build.sh 11.8 KB
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#!/bin/bash

set -e -u

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iso_name=archlinux
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iso_label="ARCH_$(date +%Y%m)"
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iso_publisher="Arch Linux <http://www.archlinux.org>"
iso_application="Arch Linux Live/Rescue CD"
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iso_version=$(date +%Y.%m.%d)
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install_dir=arch
work_dir=work
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out_dir=out
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gpg_key=
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verbose=""
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script_path=$(readlink -f ${0%/*})
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umask 0022

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_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: ${iso_label}"
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    echo "    -P <publisher>     Set a publisher for the disk"
    echo "                        Default: '${iso_publisher}'"
    echo "    -A <application>   Set an application name for the disk"
    echo "                        Default: '${iso_application}'"
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    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}
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}
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# Helper function to run make_*() only one time per architecture.
run_once() {
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    if [[ ! -e ${work_dir}/build.${1} ]]; then
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        $1
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        touch ${work_dir}/build.${1}
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    fi
}

# Setup custom pacman.conf with current cache directories.
make_pacman_conf() {
    local _cache_dirs
    _cache_dirs=($(pacman -v 2>&1 | grep '^Cache Dirs:' | sed 's/Cache Dirs:\s*//g'))
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    sed -r "s|^#?\\s*CacheDir.+|CacheDir = $(echo -n ${_cache_dirs[@]})|g" ${script_path}/pacman.conf > ${work_dir}/pacman.conf
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}

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# Base installation, plus needed packages (airootfs)
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make_basefs() {
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    mkarchiso ${verbose} -w "${work_dir}/x86_64" -C "${work_dir}/pacman.conf" -D "${install_dir}" init
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    mkarchiso ${verbose} -w "${work_dir}/x86_64" -C "${work_dir}/pacman.conf" -D "${install_dir}" -p "haveged intel-ucode amd-ucode memtest86+ mkinitcpio-nfs-utils nbd zsh efitools" install
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}

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# Additional packages (airootfs)
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make_packages() {
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    mkarchiso ${verbose} -w "${work_dir}/x86_64" -C "${work_dir}/pacman.conf" -D "${install_dir}" -p "$(grep -h -v ^# ${script_path}/packages.x86_64)" install
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}

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# Copy mkinitcpio archiso hooks and build initramfs (airootfs)
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make_setup_mkinitcpio() {
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    local _hook
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    mkdir -p ${work_dir}/x86_64/airootfs/etc/initcpio/hooks
    mkdir -p ${work_dir}/x86_64/airootfs/etc/initcpio/install
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    for _hook in archiso archiso_shutdown archiso_pxe_common archiso_pxe_nbd archiso_pxe_http archiso_pxe_nfs archiso_loop_mnt; do
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        cp /usr/lib/initcpio/hooks/${_hook} ${work_dir}/x86_64/airootfs/etc/initcpio/hooks
        cp /usr/lib/initcpio/install/${_hook} ${work_dir}/x86_64/airootfs/etc/initcpio/install
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    done
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    sed -i "s|/usr/lib/initcpio/|/etc/initcpio/|g" ${work_dir}/x86_64/airootfs/etc/initcpio/install/archiso_shutdown
    cp /usr/lib/initcpio/install/archiso_kms ${work_dir}/x86_64/airootfs/etc/initcpio/install
    cp /usr/lib/initcpio/archiso_shutdown ${work_dir}/x86_64/airootfs/etc/initcpio
    cp ${script_path}/mkinitcpio.conf ${work_dir}/x86_64/airootfs/etc/mkinitcpio-archiso.conf
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    gnupg_fd=
    if [[ ${gpg_key} ]]; then
      gpg --export ${gpg_key} >${work_dir}/gpgkey
      exec 17<>${work_dir}/gpgkey
    fi
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    ARCHISO_GNUPG_FD=${gpg_key:+17} mkarchiso ${verbose} -w "${work_dir}/x86_64" -C "${work_dir}/pacman.conf" -D "${install_dir}" -r 'mkinitcpio -c /etc/mkinitcpio-archiso.conf -k /boot/vmlinuz-linux -g /boot/archiso.img' run
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    if [[ ${gpg_key} ]]; then
      exec 17<&-
    fi
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}

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# Customize installation (airootfs)
make_customize_airootfs() {
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    cp -af ${script_path}/airootfs ${work_dir}/x86_64
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    cp ${script_path}/pacman.conf ${work_dir}/x86_64/airootfs/etc

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    curl -o ${work_dir}/x86_64/airootfs/etc/pacman.d/mirrorlist 'https://www.archlinux.org/mirrorlist/?country=all&protocol=http&use_mirror_status=on'
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    lynx -dump -nolist 'https://wiki.archlinux.org/index.php/Installation_Guide?action=render' >> ${work_dir}/x86_64/airootfs/root/install.txt
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    mkarchiso ${verbose} -w "${work_dir}/x86_64" -C "${work_dir}/pacman.conf" -D "${install_dir}" -r '/root/customize_airootfs.sh' run
    rm ${work_dir}/x86_64/airootfs/root/customize_airootfs.sh
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}
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# Prepare kernel/initramfs ${install_dir}/boot/
make_boot() {
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    mkdir -p ${work_dir}/iso/${install_dir}/boot/x86_64
    cp ${work_dir}/x86_64/airootfs/boot/archiso.img ${work_dir}/iso/${install_dir}/boot/x86_64/archiso.img
    cp ${work_dir}/x86_64/airootfs/boot/vmlinuz-linux ${work_dir}/iso/${install_dir}/boot/x86_64/vmlinuz
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}
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# Add other aditional/extra files to ${install_dir}/boot/
make_boot_extra() {
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    cp ${work_dir}/x86_64/airootfs/boot/memtest86+/memtest.bin ${work_dir}/iso/${install_dir}/boot/memtest
    cp ${work_dir}/x86_64/airootfs/usr/share/licenses/common/GPL2/license.txt ${work_dir}/iso/${install_dir}/boot/memtest.COPYING
    cp ${work_dir}/x86_64/airootfs/boot/intel-ucode.img ${work_dir}/iso/${install_dir}/boot/intel_ucode.img
    cp ${work_dir}/x86_64/airootfs/usr/share/licenses/intel-ucode/LICENSE ${work_dir}/iso/${install_dir}/boot/intel_ucode.LICENSE
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    cp ${work_dir}/x86_64/airootfs/boot/amd-ucode.img ${work_dir}/iso/${install_dir}/boot/amd_ucode.img
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    cp ${work_dir}/x86_64/airootfs/usr/share/licenses/amd-ucode/LICENSE ${work_dir}/iso/${install_dir}/boot/amd_ucode.LICENSE
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}

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# Prepare /${install_dir}/boot/syslinux
make_syslinux() {
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    _uname_r=$(file -b ${work_dir}/x86_64/airootfs/boot/vmlinuz-linux| awk 'f{print;f=0} /version/{f=1}' RS=' ')
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    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
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    cp ${work_dir}/x86_64/airootfs/usr/lib/syslinux/bios/*.c32 ${work_dir}/iso/${install_dir}/boot/syslinux
    cp ${work_dir}/x86_64/airootfs/usr/lib/syslinux/bios/lpxelinux.0 ${work_dir}/iso/${install_dir}/boot/syslinux
    cp ${work_dir}/x86_64/airootfs/usr/lib/syslinux/bios/memdisk ${work_dir}/iso/${install_dir}/boot/syslinux
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    mkdir -p ${work_dir}/iso/${install_dir}/boot/syslinux/hdt
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    gzip -c -9 ${work_dir}/x86_64/airootfs/usr/share/hwdata/pci.ids > ${work_dir}/iso/${install_dir}/boot/syslinux/hdt/pciids.gz
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    gzip -c -9 ${work_dir}/x86_64/airootfs/usr/lib/modules/${_uname_r}/modules.alias > ${work_dir}/iso/${install_dir}/boot/syslinux/hdt/modalias.gz
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}

# Prepare /isolinux
make_isolinux() {
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    mkdir -p ${work_dir}/iso/isolinux
    sed "s|%INSTALL_DIR%|${install_dir}|g" ${script_path}/isolinux/isolinux.cfg > ${work_dir}/iso/isolinux/isolinux.cfg
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    cp ${work_dir}/x86_64/airootfs/usr/lib/syslinux/bios/isolinux.bin ${work_dir}/iso/isolinux/
    cp ${work_dir}/x86_64/airootfs/usr/lib/syslinux/bios/isohdpfx.bin ${work_dir}/iso/isolinux/
    cp ${work_dir}/x86_64/airootfs/usr/lib/syslinux/bios/ldlinux.c32 ${work_dir}/iso/isolinux/
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}

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# Prepare /EFI
make_efi() {
    mkdir -p ${work_dir}/iso/EFI/boot
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    cp ${work_dir}/x86_64/airootfs/usr/share/efitools/efi/PreLoader.efi ${work_dir}/iso/EFI/boot/bootx64.efi
    cp ${work_dir}/x86_64/airootfs/usr/share/efitools/efi/HashTool.efi ${work_dir}/iso/EFI/boot/
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    cp ${work_dir}/x86_64/airootfs/usr/lib/systemd/boot/efi/systemd-bootx64.efi ${work_dir}/iso/EFI/boot/loader.efi
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    mkdir -p ${work_dir}/iso/loader/entries
    cp ${script_path}/efiboot/loader/loader.conf ${work_dir}/iso/loader/
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    cp ${script_path}/efiboot/loader/entries/uefi-shell-x86_64.conf ${work_dir}/iso/loader/entries/
    cp ${script_path}/efiboot/loader/entries/uefi-shell-full-x86_64.conf ${work_dir}/iso/loader/entries/
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    sed "s|%ARCHISO_LABEL%|${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

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    # edk2-shell based UEFI shell
    cp /usr/share/edk2-shell/x64/Shell.efi ${work_dir}/iso/EFI/Shell_x64.efi
    cp /usr/share/edk2-shell/x64/Shell_Full.efi ${work_dir}/iso/EFI/Shell_Full_x64.efi
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}

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# Prepare efiboot.img::/EFI for "El Torito" EFI boot mode
make_efiboot() {
    mkdir -p ${work_dir}/iso/EFI/archiso
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    truncate -s 64M ${work_dir}/iso/EFI/archiso/efiboot.img
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    mkfs.fat -n ARCHISO_EFI ${work_dir}/iso/EFI/archiso/efiboot.img
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    mkdir -p ${work_dir}/efiboot
    mount ${work_dir}/iso/EFI/archiso/efiboot.img ${work_dir}/efiboot
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    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
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    cp ${work_dir}/iso/${install_dir}/boot/intel_ucode.img ${work_dir}/efiboot/EFI/archiso/intel_ucode.img
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    cp ${work_dir}/iso/${install_dir}/boot/amd_ucode.img ${work_dir}/efiboot/EFI/archiso/amd_ucode.img
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    mkdir -p ${work_dir}/efiboot/EFI/boot
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    cp ${work_dir}/x86_64/airootfs/usr/share/efitools/efi/PreLoader.efi ${work_dir}/efiboot/EFI/boot/bootx64.efi
    cp ${work_dir}/x86_64/airootfs/usr/share/efitools/efi/HashTool.efi ${work_dir}/efiboot/EFI/boot/
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    cp ${work_dir}/x86_64/airootfs/usr/lib/systemd/boot/efi/systemd-bootx64.efi ${work_dir}/efiboot/EFI/boot/loader.efi
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    mkdir -p ${work_dir}/efiboot/loader/entries
    cp ${script_path}/efiboot/loader/loader.conf ${work_dir}/efiboot/loader/
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    cp ${script_path}/efiboot/loader/entries/uefi-shell-x86_64.conf ${work_dir}/efiboot/loader/entries/
    cp ${script_path}/efiboot/loader/entries/uefi-shell-full-x86_64.conf ${work_dir}/efiboot/loader/entries/
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    sed "s|%ARCHISO_LABEL%|${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
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    cp ${work_dir}/iso/EFI/Shell_x64.efi ${work_dir}/efiboot/EFI/
    cp ${work_dir}/iso/EFI/Shell_Full_x64.efi ${work_dir}/efiboot/EFI/
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    umount -d ${work_dir}/efiboot
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}
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# Build airootfs filesystem image
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make_prepare() {
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    cp -a -l -f ${work_dir}/x86_64/airootfs ${work_dir}
    mkarchiso ${verbose} -w "${work_dir}" -D "${install_dir}" pkglist
    mkarchiso ${verbose} -w "${work_dir}" -D "${install_dir}" ${gpg_key:+-g ${gpg_key}} prepare
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    rm -rf ${work_dir}/airootfs
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    # rm -rf ${work_dir}/x86_64/airootfs (if low space, this helps)
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}
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# Build ISO
make_iso() {
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    mkarchiso ${verbose} -w "${work_dir}" -D "${install_dir}" -L "${iso_label}" -P "${iso_publisher}" -A "${iso_application}" -o "${out_dir}" iso "${iso_name}-${iso_version}-x86_64.iso"
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}

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

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

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mkdir -p ${work_dir}
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run_once make_pacman_conf
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run_once make_basefs
run_once make_packages
run_once make_setup_mkinitcpio
run_once make_customize_airootfs
run_once make_boot
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run_once make_boot_extra
run_once make_syslinux
run_once make_isolinux
run_once make_efi
run_once make_efiboot
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run_once make_prepare
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run_once make_iso