bootstrap

#!/usr/bin/env -S bash -ue

if [ ${1:-x} = "-h" ] || [ ${1:-x} = "--help" ] || [ $# -eq 0 ]; then
	name="$(realpath "$(basename "$0")")"
	cat <<EOF
Automate system installation and configuration.

Given a list of directories relative to the location of this script,
enter each directory and source the file named 'bootstrap', one directory
at a time in the specified order.

Usage:

    (1) $name DIR [DIR]...
    (2) $name -

    Pass directory names as arguments (1), or read directory names from stdin, one directory per line.
EOF
	[ $# -eq 0 ] && exit 1 || exit 0
fi


# hack sudo to use PW envvar; must be defined.
if [ ! ${PW+x} ]; then
	echo "Envvar 'PW' must contain sudo password. Abort." >&2
	exit 1
fi
sudo() {
	echo "$PW" | /bin/sudo -Sp '' "$@"
}

die() { echo -e "[\033[31;1m ERR\033[0m]" "$@" >&2; exit 1; }
log() { echo -e "[\033[32;1mINFO\033[0m]" "$@"; }

# TODO: Check that script is run as a regular user
#       Actually, don't! Why not run this as a sysadmin?
# TODO: Record progress of installation

rootdir="$(realpath "$(dirname "$0")")"
cd "$rootdir"

if [ "$1" = "-" ]; then
	cat -
else
	printf '%s\n' "$@"
fi | while read target; do
	if [ -f "$target" ]; then
		break;
	elif [ -d "$target" ] && [ -f "$target/bootstrap" ]; then
		# don't use subshells in case we source something
		log "Preparing to install '$target'..."
		cd "$target"
		. "./bootstrap"
		cd "$rootdir"
	else
		echo "File '$target/bootstrap' doesn't exist. Abort." >&2
		exit 1
	fi
done