can-strap

#!/bin/bash

usage() {
	bin=$(basename $0)
	echo >&2 "Usage: $bin [-x] [-c pacman.conf] name [can-set...] [-- pacstrap-opts...]"
	echo >&2
	echo >&2 "Bootstraps arch chroot in /var/lib/machines from"
	echo >&2 " a can-* meta-package (default: base) using pacstrap."
	echo >&2 "pacman.conf should have a repo where can-* packages will be available."
	echo >&2 "See can-base package here:"
	echo >&2 "  https://github.com/mk-fg/archlinux-pkgbuilds/blob/master/can-base/PKGBUILD"
	echo >&2
	echo >&2 "Example: $bin -c pacman.i686.conf mymachine tools py -- -i"
	exit ${1:-0}
}
[[ -z "$1" || "$1" = -h || "$1" = --help ]] && usage

pacman_conf=/etc/pacman.conf
[[ "$1" = -x ]] && { set -x; shift; }
[[ "$1" = -c ]] && { shift; pacman_conf=$(realpath "$1"); shift; }
[[ -z "$1" ]] && usage 1
can=$1
shift

can_sets=()
[[ -z "$1" ]]\
	&& can_sets+=( can-base )\
	|| while :; do
			can_set=$1; shift
			[[ -z "$can_set" || "$can_set" = -- ]] && break
			can_sets+=( can-"$can_set" )
		done


set -e -o pipefail
export LC_ALL=C

cd /var/lib/machines

mkdir -p "$can"
pacstrap "$@" -c -C "$pacman_conf" -d "$can" "${can_sets[@]}"

for conf in \
	/etc/{localtime,profile,locale.gen,locale.conf} \
	/etc/{screenrc,nanorc,gitconfig,pacman.d/mirrorlist}
do [[ ! -e "$conf" ]] || rsync -aL "$conf" "$can$conf"
done

chsh_cmd=true
[[ "${SHELL##*/}" != zsh || ! -e "$can"/etc/zsh/ ]] || {
	cp /etc/zsh/* "$can"/etc/zsh/
	[[ ! -e /root/.zshrc ]] || cp /root/.zshrc "$can"/root/
	chsh_cmd="chsh -s $SHELL"
}

systemd-nspawn -D "$can" sh -c "locale-gen && $chsh_cmd"