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#!/bin/sh
. /etc/rc.sh ||:
set -eu


usage() {
	cat <<-'EOF'
		Usage: reconfigure [-n] [-U] [SHA]
	EOF
}


UPDATE=false
DRY_RUN=false
while getopts 'nU' flag; do
	case "$flag" in
		(n)
			DRY_RUN=true
			;;
		(U)
			UPDATE=true
			;;
		(*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))



SHA="${1:-origin/main}"


if [ "$UPDATE" = true ] && [ "$DRY_RUN" = false ]; then
	guix pull -v3
fi


if [ "$DRY_RUN" = true ]; then
	ACTION=build
	DEPLOY_OPT=-n
else
	ACTION=reconfigure
	DEPLOY_OPT=
fi

cd /opt/server
git fetch
git checkout "$SHA"

untill -m3 guix system -v3 "$ACTION" /etc/guix/system.scm

cicd add $DEPLOY_OPT /srv/git/*.git