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#!/bin/bash
set -e -u
# global settings
iso_name=amenthes
iso_label="AMENTHES"
install_dir=arch
arch=$(uname -m)
work_dir=work
encrypt_dir=encrypt
out_dir=out
# args
testing=false
# other paths
pacman_conf=${work_dir}/pacman.conf
script_path=$(readlink -f ${0%/*})
_usage() {
echo "usage ${0} [options]"
echo
echo " General options:"
echo " -t Enable testing packages (use for development ONLY)"
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}_${arch}
fi
}
# Setup custom pacman.conf with current cache directories.
make_pacman_conf() {
local _cache_dirs
_cache_dirs=($(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 > ${pacman_conf}
}
# Base installation (airootfs)
make_basefs() {
mkarchiso -v -w "${work_dir}" -C "${pacman_conf}" -D "${install_dir}" init
}
# Additional packages (airootfs)
make_packages() {
local _packages
if [ "$testing" = true ]; then
_packages=$(grep -h -v ^# ${script_path}/packages{,-test}.x86_64)
else
_packages=$(grep -h -v ^# ${script_path}/packages.x86_64)
fi
mkarchiso -v -w "${work_dir}" -C "${pacman_conf}" -D "${install_dir}" -p "${_packages}" 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 "${install_dir}" -r 'mkinitcpio -c /etc/mkinitcpio-archiso.conf -k /boot/vmlinuz-linux -g /boot/archiso.img' run
}
# Prepare encrypted loop device
make_encrypted_device() {
# Variables
local _cryptsize=$(expr $(du -d0 ${encrypt_dir} | grep -oe "[0-9]*") + 10000) # add 10MB for crypt metadata
local _loopdev=$(losetup -f)
# Setup
dd if=/dev/zero of=${work_dir}/airootfs/encrypted bs=1K count=${_cryptsize}
losetup ${_loopdev} ${work_dir}/airootfs/encrypted
echo "passphrase" | cryptsetup luksFormat ${_loopdev} -
echo "passphrase" | cryptsetup open ${_loopdev} cryptloop --key-file -
mkfs.ext4 /dev/mapper/cryptloop
# Mount and copy
mkdir -p ${work_dir}/airootfs/mnt/decrypted
mount /dev/mapper/cryptloop ${work_dir}/airootfs/mnt/decrypted
rmdir ${work_dir}/airootfs/mnt/decrypted/lost+found
cp -a ${encrypt_dir}/* ${work_dir}/airootfs/mnt/decrypted
# Cleanup
umount ${work_dir}/airootfs/mnt/decrypted
cryptsetup close cryptloop
losetup -d ${_loopdev}
}
# Customize installation (airootfs)
make_customize_airootfs() {
cp -af ${script_path}/airootfs ${work_dir}
mkarchiso -v -w "${work_dir}" -C "${pacman_conf}" -D "${install_dir}" -r '/root/customize_airootfs.sh' run
rm ${work_dir}/airootfs/root/customize_airootfs.sh
}
# 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}-${arch}.iso"
}
(pacman -Qq archiso > /dev/null) || (echo "This script requires archiso(-git) to be installed"; _usage 1)
if [[ ${EUID} -ne 0 ]]; then
echo "This script must be run as root."
_usage 1
fi
if [[ ${arch} != x86_64 ]]; then
echo "This script needs to be run on x86_64"
_usage 1
fi
while getopts 'th' arg; do
case "${arg}" in
t) testing=true ;;
h) _usage 0 ;;
*)
echo "Invalid argument '${arg}'"
_usage 1
;;
esac
done
mkdir -p ${work_dir}
run_once make_pacman_conf
run_once make_basefs
run_once make_packages
run_once make_setup_mkinitcpio
run_once make_encrypted_device
run_once make_customize_airootfs
run_once make_boot
run_once make_syslinux
run_once make_isolinux
run_once make_prepare
run_once make_iso
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