build: add image builder and image variants

build.sh

@@ -0,0 +1,191 @@
+#!/bin/bash
+
+set -o nounset -o errexit
+readonly DEFAULT_DISK_SIZE="2G"
+readonly IMAGE="image.img"
+readonly MIRROR='https://fastly.mirror.pkgbuild.com/$repo/os/$arch'
+
+function init() {
+  readonly ORIG_PWD="${PWD}"
+  readonly OUTPUT="${PWD}/output"
+  mkdir -p "${OUTPUT}" "${PWD}/tmp"
+  local tmpdir
+  tmpdir="$(mktemp --directory --tmpdir="${PWD}/tmp")"
+  readonly TMPDIR="${tmpdir}"
+  if [ -n "${SUDO_UID:-}" ] && [[ -n "${SUDO_GID:-}" ]]; then
+    chown "${SUDO_UID}:${SUDO_GID}" "${OUTPUT}" "${TMPDIR}"
+  fi
+  cd "${TMPDIR}"
+
+  readonly MOUNT="${PWD}/mount"
+  mkdir "${MOUNT}"
+}
+
+function cleanup() {
+  set +o errexit
+  if [ -n "${MOUNT:-}" ] && mountpoint -q "${MOUNT}"; then
+    umount --recursive "${MOUNT}" || exit 1
+  fi
+  if [ -n "${LOOPDEV:-}" ]; then
+    losetup -d "${LOOPDEV}"
+  fi
+  if [ -n "${TMPDIR:-}" ]; then
+    rm -rf "${TMPDIR}"
+  fi
+}
+trap cleanup EXIT
+
+function setup_disk() {
+  truncate -s "${DEFAULT_DISK_SIZE}" "${IMAGE}"
+  sgdisk --align-end \
+    --clear \
+    --new 0:0:+1M --typecode=0:ef02 --change-name=0:'BIOS boot partition' \
+    --new 0:0:+300M --typecode=0:ef00 --change-name=0:'EFI system partition' \
+    --new 0:0:0 --typecode=0:8304 --change-name=0:'Parch Linux root' \
+    "${IMAGE}"
+
+  LOOPDEV=$(losetup --find --partscan --show "${IMAGE}")
+  wait_until_settled "${LOOPDEV}"
+  mkfs.fat -F 32 -S 4096 "${LOOPDEV}p2"
+  mkfs.btrfs "${LOOPDEV}p3"
+  mount -o compress=zstd:1 "${LOOPDEV}p3" "${MOUNT}"
+  mount --mkdir "${LOOPDEV}p2" "${MOUNT}/efi"
+}
+
+function bootstrap() {
+  cat <<EOF >pacman.conf
+[options]
+Architecture = auto
+SigLevel = DatabaseOptional
+
+[world]
+SigLevel = Never
+Server = https://github.com/parchlinux/world/raw/refs/heads/main/\$arch/
+
+[core]
+Include = mirrorlist
+
+[extra]
+Include = mirrorlist
+EOF
+  echo "Server = ${MIRROR}" >mirrorlist
+
+  pacstrap -c -C pacman.conf -M "${MOUNT}" base linux grub openssh sudo btrfs-progs dosfstools efibootmgr qemu-guest-agent parchlinux-keyring parch-branding lsb-release
+  gpgconf --homedir "${MOUNT}/etc/pacman.d/gnupg" --kill gpg-agent
+  cp -a --no-preserve=ownership "${ORIG_PWD}/branding/." "${MOUNT}/"
+  install -Dm 644 "${ORIG_PWD}/branding/usr/lib/os-release_parch" "${MOUNT}/usr/local/share/parch-branding/os-release"
+  install -Dm 644 "${ORIG_PWD}/branding/etc/issue_parch" "${MOUNT}/usr/local/share/parch-branding/issue"
+  install -Dm 644 "${ORIG_PWD}/branding/etc/lsb-release_parch" "${MOUNT}/usr/local/share/parch-branding/lsb-release"
+  install -Dm 644 "${ORIG_PWD}/branding/usr/share/pixmaps/parch-logo.svg" "${MOUNT}/usr/local/share/parch-branding/pixmaps/parch-logo.svg"
+  install -Dm 644 "${ORIG_PWD}/branding/usr/share/pixmaps/parch-logo-dark.svg" "${MOUNT}/usr/local/share/parch-branding/pixmaps/parch-logo-dark.svg"
+}
+
+function image_cleanup() {
+  rm -rf "${MOUNT}/etc/pacman.d/gnupg/"
+
+  printf '\nMODULES=(virtio_pci virtio_blk virtio_scsi btrfs sr_mod)\n' >>"${MOUNT}/etc/mkinitcpio.conf"
+  arch-chroot "${MOUNT}" /usr/bin/mkinitcpio -P
+
+  sync -f "${MOUNT}/etc/os-release"
+  fstrim --verbose "${MOUNT}"
+  fstrim --verbose "${MOUNT}/efi"
+}
+
+function wait_until_settled() {
+  udevadm settle
+  blockdev --flushbufs --rereadpt "${1}"
+  until test -e "${1}p3"; do
+    echo "${1}p3 doesn't exist yet..."
+    sleep 1
+  done
+}
+
+function mount_image() {
+  LOOPDEV=$(losetup --find --partscan --show "${1:-${IMAGE}}")
+  wait_until_settled "${LOOPDEV}"
+  mount -o compress=zstd:1 "${LOOPDEV}p3" "${MOUNT}"
+  mount --bind "/var/cache/pacman/pkg" "${MOUNT}/var/cache/pacman/pkg"
+}
+
+function unmount_image() {
+  umount --recursive "${MOUNT}"
+  losetup -d "${LOOPDEV}"
+  LOOPDEV=""
+}
+
+function mv_to_output() {
+  sha256sum "${1}" >"${1}.SHA256"
+  if [ -n "${SUDO_UID:-}" ]; then
+    chown "${SUDO_UID}:${SUDO_GID}" "${1}"{,.SHA256}
+  fi
+  mv "${1}"{,.SHA256} "${OUTPUT}/"
+}
+
+function create_image() {
+  local tmp_image
+  tmp_image="$(basename "$(mktemp -u)")"
+  cp -a "${IMAGE}" "${tmp_image}"
+  if [ -n "${DISK_SIZE}" ]; then
+    truncate -s "${DISK_SIZE}" "${tmp_image}"
+    sgdisk --align-end --delete 3 "${tmp_image}"
+    sgdisk --align-end --move-second-header \
+      --new 0:0:0 --typecode=0:8304 --change-name=0:'Parch Linux root' \
+      "${tmp_image}"
+  fi
+  mount_image "${tmp_image}"
+  if [ -n "${DISK_SIZE}" ]; then
+    btrfs filesystem resize max "${MOUNT}"
+  fi
+
+  if [ 0 -lt "${#PACKAGES[@]}" ]; then
+    arch-chroot "${MOUNT}" /usr/bin/pacman -S --noconfirm "${PACKAGES[@]}"
+  fi
+  if [ 0 -lt "${#SERVICES[@]}" ]; then
+    arch-chroot "${MOUNT}" /usr/bin/systemctl enable "${SERVICES[@]}"
+  fi
+  "${2}"
+  image_cleanup
+  unmount_image
+  "${3}" "${tmp_image}" "${1}"
+  mv_to_output "${1}"
+}
+
+function main() {
+  if [ "$(id -u)" -ne 0 ]; then
+    echo "root is required"
+    exit 1
+  fi
+  init
+
+  if [ -n "${2:-}" ] && [ ! -f "${ORIG_PWD}/images/${2}.sh" ]; then
+    echo "Unknown image variant '${2}'. Available variants are: $(find "${ORIG_PWD}/images" -maxdepth 1 -type f -name '*.sh' ! -name base.sh -printf '%f\n' | sed 's/\.sh$//' | tr '\n' ' ')"
+    exit 1
+  fi
+
+  setup_disk
+  bootstrap
+  source "${ORIG_PWD}/images/base.sh"
+  pre
+  unmount_image
+
+  local build_version
+  if [ -z "${1:-}" ]; then
+    build_version="$(date +%Y%m%d).0"
+    echo "WARNING: BUILD_VERSION wasn't set!"
+    echo "Falling back to $build_version"
+  else
+    build_version="${1}"
+  fi
+
+  for image in "${ORIG_PWD}/images/"*.sh; do
+    if [ "$(basename "${image}")" = "base.sh" ]; then
+      continue
+    fi
+    if [ -n "${2:-}" ] && [ "$(basename "${image}" .sh)" != "${2}" ]; then
+      continue
+    fi
+    source "${image}"
+    create_image "${IMAGE_NAME}" pre post
+  done
+}
+main "$@"