Work on arch bootstrap script
CAN I MAKE UP MY MIND PLEASE
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archstrap.sh
Executable file
208
archstrap.sh
Executable file
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#! /bin/bash
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#
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# archstrap
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# Build an Arch system in /mnt
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# Copyright (C) 2020 Vintage Salt <rehashedsalt@cock.li>
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#
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# Distributed under terms of the MIT license.
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#
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set -e
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# Read-only set-once variables
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declare -r _name="$(basename -- "$0")"
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# Options
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declare -i _optchroot
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declare -i _opthelp
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declare -i _optverbose
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declare _optdest="/mnt"
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# Working variables
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declare -a _args
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declare _return
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# Helper functions
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log() {
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# Print a line to the terminal if _optverbose is greater than $2
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# $2 defaults to 0
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# loglevel 0: Daily-use messages
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# loglevel 1: Detailed but not quite debugging
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# loglevel 2: Definitely debugging
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[ -z "$1" ] && return 1
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if (( _optverbose >= ${2:-0} )); then
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printf "%s\\n" "$1"
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fi
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}
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warn() {
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# Print a yellow line to the terminal, respecting _optverbose
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[ -z "$1" ] && return 1
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if (( _optverbose >= ${2:-0} )); then
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if [ -t 1 ]; then
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printf "\\e[33m%s\\e[0m\\n" "$1"
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else
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printf "WARN: %s\\n" "$1"
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fi
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fi
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}
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error() {
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# Print a red line to the terminal, exit if $2 is specified
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[ -z "$1" ] && return 1
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if [ -t 2 ]; then
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printf "\\e[31m%s\\e[0m\\n" "$1" 1>&2
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else
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printf "ERROR: %s\\n" "$1" 1>&2
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fi
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[ -z "$2" ] && return
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exit "${2:-1}"
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}
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has() {
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# Parse out all arguments and try to find them in path
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# If an argument cannot be found, set _return and fail
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for prog in "$@"; do
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if ! command -v "$prog" > /dev/null 2>&1; then
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_return="$prog"
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return 1
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fi
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done
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return 0
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}
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# Helper functions
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cleanup() {
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[ -z "$1" ] && warn "No argument passed to cleanup"
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rm -rf "$1" || warn "failed to remove $1: $?"
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}
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# Core program functions
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printhelp() {
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cat << EOF
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Usage: $_name [OPTION]...
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-c [FILE] Load the given file in place of the usual config file
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-h Print this help text
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-v Print more status messages. Stacks
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Copyright (c) 2020 rehashedsalt@cock.li
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Licensed under the MIT license
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EOF
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}
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arch-build() {
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# Download and unpack our minimal Arch image. Or pacstrap it or whatever
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log "Bootstrapping an Arch installation"
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script="https://raw.githubusercontent.com/tokland/arch-bootstrap/master/arch-bootstrap.sh"
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bootstrap="$(mktemp)"
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for file in "$bootstrap"; do
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touch "$file"
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chmod 0700 "$file"
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trap EXIT cleanup "$file"
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done
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"$bootstrap" "$_optdest"
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}
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arch-chroot() {
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# Jump to our new Arch chroot
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log "Pivoting to chroot"
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cp "$0" "$_optdest/archstrap.sh"
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if ! grep -qs "$_optdest/proc " /proc/mounts; then
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log "Mounting proc"
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mount --types proc /proc "$_optdest/proc"
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fi
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for dir in sys dev; do
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log "Mounting $dir"
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if ! grep -qs "$_optdest/$dir " /proc/mounts; then
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mount --rbind /$dir "$_optdest/$dir"
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mount --make-rslave /$dir "$_optdest/$dir"
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fi
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done
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chroot "$_optdest" /archstrap.sh -c
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}
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arch-chroot-configure() {
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# Configure the Arch system from within the chroot
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# Required packages
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pacman -S linux linux-firmware grub
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# Secondary packages
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pacman -S sudo
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cat <<-EOF >> "/etc/sudoers"
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%wheel ALL=(ALL) ALL
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ansible ALL=(ALL) NOPASSWD:ALL
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EOF
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# Configure my user
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if ! id salt > /dev/null 2>&1; then
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useradd salt -m -G wheel -s /bin/bash -u 1000 -U
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passwd salt
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fi
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for group in wheel; do
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usermod -G "$group" -a salt || warn "Failed to add salt to group: $group"
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done
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# Configure Ansible user
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if ! id ansible > /dev/null 2>&1; then
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useradd ansible -m -s /bin/bash -u 1001 -U
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fi
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sudo -u ansible -i mkdir .ssh
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sudo -u ansible -i chmod 0700 .ssh
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sudo -u ansible -i echo "ssh-rsa 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 ansible" > ~ansible/.ssh/authorized_keys
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sudo -u ansible -i chmod 0600 .ssh/authorized_keys
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cat <<-EOF
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Initial system configuration is comiplete. Just a few tasks remain:
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* Mount the ESP under /boot/efi
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* Verify fstab
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* Install GRUB
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Dumping to a shell now. Have fun!
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EOF
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exec bash
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}
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# Main
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main() {
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# Parse out arguments
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while [ -n "$1" ]; do
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# Parse out flags
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while getopts ":chv" opt; do
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case $opt in
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c)
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_optchroot=1
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;;
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h)
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_opthelp=1
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;;
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v)
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_optverbose+=1
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;;
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:)
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error "Option requires argument: -$OPTARG" 2
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;;
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*)
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error "Invalid option: -$OPTARG" 2
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;;
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esac
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done
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# Store arguments
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shift $((OPTIND - 1))
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if [ -n "$1" ]; then
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_args+=("$1")
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shift
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fi
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unset OPTIND
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done
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# Early hook for help
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[ -n "$_opthelp" ] && printhelp && exit 0
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# Validate critical options
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# TODO: That
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# Validate core program dependencies
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log "Validating dependencies" 2
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if ! has basename curl zstd; then
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error "Failed to find program: $_return" 1
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fi
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# Do the do
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if [ -n "$_optchroot" ]; then
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# We're doing in-chroot configuration
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arch-chroot-configure
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else
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arch-build
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arch-chroot
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fi
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exit 0
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}
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main "$@"
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