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#!/usr/bin/env bash
set -e -u
iso_name=archlinux
iso_label="ARCH_$(date +%Y%m)"
iso_version=$(date +%Y.%m.%d)
install_dir=arch
arch=$(uname -m)
work_dir=work
out_dir=out
script_path="$( cd -P "$( dirname "$(readlink -f "$0")" )" && pwd )"
umask 0022
# Helper function to run make_*() only one time per architecture.
run_once() {
if [[ ! -e "${work_dir}/build.${1}_${arch}" ]]; then
"$1"
touch "${work_dir}/build.${1}_${arch}"
fi
}
# Setup custom pacman.conf with current cache directories.
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.conf"
}
# Prepare working directory and copy custom airootfs files (airootfs)
make_custom_airootfs() {
local _airootfs="${work_dir}/airootfs"
mkdir -p -- "${_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 -- "${_airootfs}/etc/gshadow"
fi
}
# Packages (airootfs)
make_packages() {
mkarchiso -v -w "${work_dir}" -C "${work_dir}/pacman.conf" -D "${install_dir}" \
-p "$(grep -h -v '^#' "${script_path}/packages.x86_64"| sed ':a;N;$!ba;s/\n/ /g')" install
}
# Copy mkinitcpio archiso hooks and build initramfs (airootfs)
make_setup_mkinitcpio() {
mkdir -p "${work_dir}/airootfs/etc/initcpio/hooks"
mkdir -p "${work_dir}/airootfs/etc/initcpio/install"
cp /usr/lib/initcpio/hooks/archiso "${work_dir}/airootfs/etc/initcpio/hooks"
cp /usr/lib/initcpio/install/archiso "${work_dir}/airootfs/etc/initcpio/install"
cp "${script_path}/mkinitcpio.conf" "${work_dir}/airootfs/etc/mkinitcpio-archiso.conf"
mkarchiso -v -w "${work_dir}" -D "${install_dir}" \
-r 'mkinitcpio -c /etc/mkinitcpio-archiso.conf -k /boot/vmlinuz-linux -g /boot/archiso.img' run
}
# Prepare ${install_dir}/boot/
make_boot() {
mkdir -p "${work_dir}/iso/${install_dir}/boot/${arch}"
cp "${work_dir}/airootfs/boot/archiso.img" "${work_dir}/iso/${install_dir}/boot/${arch}/archiso.img"
cp "${work_dir}/airootfs/boot/vmlinuz-linux" "${work_dir}/iso/${install_dir}/boot/${arch}/vmlinuz"
}
# Prepare /${install_dir}/boot/syslinux
make_syslinux() {
mkdir -p "${work_dir}/iso/${install_dir}/boot/syslinux"
sed "s|%ARCHISO_LABEL%|${iso_label}|g;
s|%INSTALL_DIR%|${install_dir}|g;
s|%ARCH%|${arch}|g" "${script_path}/syslinux/syslinux.cfg" > \
"${work_dir}/iso/${install_dir}/boot/syslinux/syslinux.cfg"
cp "${work_dir}/airootfs/usr/lib/syslinux/bios/ldlinux.c32" "${work_dir}/iso/${install_dir}/boot/syslinux/"
cp "${work_dir}/airootfs/usr/lib/syslinux/bios/menu.c32" "${work_dir}/iso/${install_dir}/boot/syslinux/"
cp "${work_dir}/airootfs/usr/lib/syslinux/bios/libutil.c32" "${work_dir}/iso/${install_dir}/boot/syslinux/"
}
# 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 "${work_dir}/airootfs/usr/lib/syslinux/bios/isolinux.bin" "${work_dir}/iso/isolinux/"
cp "${work_dir}/airootfs/usr/lib/syslinux/bios/isohdpfx.bin" "${work_dir}/iso/isolinux/"
cp "${work_dir}/airootfs/usr/lib/syslinux/bios/ldlinux.c32" "${work_dir}/iso/isolinux/"
}
# Build airootfs filesystem image
make_prepare() {
mkarchiso -v -w "${work_dir}" -D "${install_dir}" prepare
}
# Build ISO
make_iso() {
mkarchiso -v -w "${work_dir}" -D "${install_dir}" -L "${iso_label}" -o "${out_dir}" iso \
"${iso_name}-${iso_version}-${arch}.iso"
}
run_once make_custom_airootfs
run_once make_pacman_conf
run_once make_packages
run_once make_setup_mkinitcpio
run_once make_boot
run_once make_syslinux
run_once make_isolinux
run_once make_prepare
run_once make_iso
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