241 lines
7.1 KiB
Bash
Executable File
241 lines
7.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# 2018 Luke Shumaker
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declare -r NAME=osi-mk
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declare -r VERSION=20180812
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# Why is this different than mkosi[1]?
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#
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# - mkosi claims to be "legacy-free"--but they call everything that's
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# not systemd "legacy"; that clearly won't do for creating OpenRC
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# images.
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#
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# - mkosi claims to be "legacy-free", only supporting GPT
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# disk-labels--but btrfs can be booted directly, without a separate
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# disk-label, or a separate ESP partition. To a btrfs disk, GPT/ESP
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# is legacy.
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#
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# - Using a raw btrfs disk means that it can easily be mounted without
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# first disecting the disk-label.
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#
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# [1]: https://github.com/systemd/mkosi
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set -euE -o pipefail
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source "${BASH_SOURCE[0]%/*}/lib/osi.sh"
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loaded_modules=()
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load_module() {
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local module
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if ! [[ -f $1 ]]; then
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error 2 'Module does not exist: %s' "$1"
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fi
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module="$(realpath -- "$1")"
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if in_array "$module" "${loaded_modules[@]}"; then
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return 0
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fi
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loaded_modules+=("$module")
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source "$1"
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}
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osi-mk:genfstab() {
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local arg_mountpoint=$1
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genfstab -t uuid "$arg_mountpoint" > "${arg_mountpoint}/etc/fstab"
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}
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osi-mk:directories() {
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local arg_mountpoint=$1
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local spec outside inside
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for spec in "${arg_directories[@]}"; do
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outside="${spec%:*}"
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inside="${spec#"${outside}:"}"
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# TODO: maybe rsync would be better?
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if [[ -d "${arg_mountpoint}/${inside}" ]]; then
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rm -rf -- "${arg_mountpoint}/${inside}"
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fi
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mkdir -p -- "$(dirname -- "${arg_mountpoint}/${inside}")"
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cp -aT -- "$outside" "${arg_mountpoint}/${inside}"
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done
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}
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osi-mk:grub-install() {
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local arg_mountpoint=$1
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cat <<-'EOT' >> "$arg_mountpoint/etc/default/grub"
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GRUB_TIMEOUT=0
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GRUB_DEFAULT=1 # Use the fallback initramfs, to get all drivers
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EOT
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arch-chroot -- "$arg_mountpoint" sh -c \
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'grub-install "$(awk '\''$2 == "/" { print $1 }'\'' </proc/mounts)"'
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arch-chroot -- "$arg_mountpoint" grub-mkconfig -o /boot/grub/grub.cfg
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}
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main() {
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local arg_mode=outside
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local arg_mountpoint=
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local arg_size=1G
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local arg_edit=false
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local arg_directories=()
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local arg_modules=()
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local arg_packages=()
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local args
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if ! args="$(getopt -n "${0##*/}" -o "se:d:m:p:hV" -l "inside:,size:,edit,directory:,module:,package:,help,version" -- "$@")"; then
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arg_mode=error
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else
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eval "args=($args)"
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set -- "${args[@]}"
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while true; do
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case "$1" in
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--inside) shift; arg_mode=inside; arg_mountpoint=$1; shift;;
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-s|--size) shift; arg_size=$1; shift;;
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-e|--edit) shift; arg_edit=true;;
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-d|--directory) shift; arg_directories+=("$1"); shift;;
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-m|--module) shift; arg_modules+=("$1"); shift;;
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-p|--package) shift; arg_packages+=("$1"); shift;;
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-V|--version) shift; arg_mode=version;;
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-h|--help) shift; arg_mode=usage;;
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--) shift; break;;
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*) error 1 'Internal error. The programmer writing this tool screwed up.';;
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esac
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done
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case "$arg_mode" in
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outside|inside)
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if (( $# != 1 )); then
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if (( $# == 0 )); then
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error 0 "Expected 1 positional argument, got none"
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else
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error 0 "Expected 1 positional argument, got %d: %s" "$#" "${@@Q}"
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fi
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arg_mode=error
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else
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arg_file=$1
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fi
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for module in "${arg_modules[@]}"; do
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if ! [[ -f $module ]]; then
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error 0 'Module does not exist: %s' "$module"
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arg_mode=error
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fi
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done
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for dirspec in "${arg_directories[@]}"; do
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if ! [[ -d "${dirspec%:*}" ]]; then
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error 0 'Directory does not exist: %s' "${dirspec%:*}"
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arg_mode=error
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fi
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done
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;;
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esac
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fi
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case "$arg_mode" in
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error) print "Try '%q --help' for more information" "${0##*/}" >&2; return 2;;
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version)
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print "%s (notsystemd) %s" "$NAME" "$VERSION"
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return 0
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;;
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usage)
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print 'Usage: %s [OPTIONS] FILENAME.img' "${0##*/}"
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print 'Operating System Image: Make'
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echo
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print 'Create a mountable, bootable OS image.'
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echo
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print 'OPTIONS:'
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# --inside is internal-only; undocumented
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print ' -s SIZE, --size=SIZE set the size of the image (default: 1G)'
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print ' -e, --edit edit an existing image'
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echo
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print ' -d OUTSIDE:INSIDE, --directory=OUTSIDE:INSIDE include the given directory'
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print ' -m MOD.sh, --module=MOD.sh include the given module'
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print ' -p PACKAGE, --package=package include the given package (or group)'
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echo
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print ' -h, --help display this help'
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print ' -V, --version output version information'
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return 0
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;;
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# main code starts here
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outside)
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if $arg_edit; then
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if ! [[ -f "$arg_file" ]]; then
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error 1 'Image must already exist to --edit: %s' "$arg_file"
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fi
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# TODO: resize according to $arg_size
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else
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if [[ -e "$arg_file" ]]; then
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error 1 'Image file already exists, refusing to overwrite: %s' "$arg_file"
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fi
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printf -v prefix "$(gettext -- '%s [format]')" "$NAME"
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{
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truncate --size="$arg_size" -- "$arg_file"
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mkfs.btrfs -- "$arg_file"
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} |& sed "s|^|${prefix} |"
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fi
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arg_mountpoint=$(mktemp -dt -- "${0##*/}.XXXXXXXXXX")
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# shellcheck disable=SC2064
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trap "rmdir -- ${arg_mountpoint@Q}" EXIT
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sudo -- ./osi-mount "$arg_file" "$arg_mountpoint" "${BASH_SOURCE[0]}" --inside="$arg_mountpoint" "${args[@]}"
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;;
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inside) # just keep reading...
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needs_sudo
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### Load modules ###
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packages=("${arg_packages[@]}")
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cache_packages=()
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post_install=(
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50:osi-mk:directories
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)
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if ! $arg_edit; then
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packages+=(grub btrfs-progs)
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post_install+=(
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00:osi-mk:genfstab
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99:osi-mk:grub-install
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)
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fi
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for module in "${arg_modules[@]}"; do
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load_module "$module"
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done
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cache_packages+=("${packages[@]}")
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#### install ###
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printf -v prefix "$(gettext -- '%s [install]')" "$NAME"
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{
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# Pre-fill the package cache
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if (( ${#cache_packages[@]} > 0 )); then
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mkdir -p -- "$arg_mountpoint"/var/{cache/pacman/pkg,lib/pacman,log}
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# Download anything the host doesn't already have cached
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pacman -r "$arg_mountpoint" --config=/usr/share/pacman/defaults/pacman.conf.x86_64 \
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-Syw --noconfirm -- "${cache_packages[@]}"
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# Copy needed packages from host cache to image cache
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pacman -r "$arg_mountpoint" --config=/usr/share/pacman/defaults/pacman.conf.x86_64 \
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-Sp --print-format='%l' -- "${cache_packages[@]}" \
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| sed -n 's,^file://,,p' \
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| xargs -d $'\n' -r cp -t "$arg_mountpoint/var/cache/pacman/pkg" --
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fi
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if (( ${#packages[@]} > 0 )); then
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# The --hookdir bit is to hack around https://bugs.archlinux.org/task/49347
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pacstrap -M -C /usr/share/pacman/defaults/pacman.conf.x86_64 -- "$arg_mountpoint" \
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--hookdir="$arg_mountpoint/etc/pacman.d/hooks" \
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--needed \
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"${packages[@]}"
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fi
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} |& sed "s|^|${prefix} |"
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### post_install ###
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while IFS=: read -r n fn; do
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printf -v prefix "$(gettext -- '%s [post_install:%s:%s]')" "$NAME" "$n" "$fn"
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{
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print Begin
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"$fn" "$arg_mountpoint"
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print End
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} |& sed "s|^|${prefix} |"
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done < <(printf '%s\n' "${post_install[@]}" | sort)
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### End ###
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print '%s Done' "$NAME"
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;;
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*) error 1 'Internal error. The programmer writing this tool screwed up.';;
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esac
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}
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main "$@"
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