dotwryn/scwrypts/remote/tmux/manager

#!/usr/bin/env zsh
#
# must work as a standalone zsh script
#
eval "$(scwrypts --config)" \
	&& use omni --group remote \
	&& utils.check-environment \
	|| { echo 'scwrypts config error; aborting' >&2; sleep 5; return 1; }

#####################################################################

OMNI_LOGFILE="${OMNI_LOGDIR}/omni.current.txt"

[ -f "${OMNI_LOGFILE}" ] && {
	for x in {1..99}
	do
		[ ! -f "${OMNI_LOGDIR}/omni.${x}.txt" ] && {
			mv "${OMNI_LOGFILE}" "${OMNI_LOGDIR}/omni.${x}.txt"
			break
		}
	done
}

echo "OMNI MANAGER START : $(date)" > "${OMNI_LOGFILE}"

#####################################################################

get-unique-window-id() {
	local MODE=use-default

	local WINDOW_ID="$(eval echo "\$WINDOW_ID__${REMOTE_NAME}")"
	: \
		&& [[ $(eval echo "\$CAN_CONNECT__${REMOTE_NAME}") =~ true ]] \
		&& [ ${WINDOW_ID} ] \
		&& echo ${WINDOW_ID} \
		&& return 0 \
		;

	unset WINDOW_ID__${REMOTE_NAME} &>>"${OMNI_LOGFILE}"

	WINDOW_ID="$1"
	WINDOW_ID=$(remote.config.yq .sessions.${REMOTE_NAME}.id)
	[ ${WINDOW_ID} ] && MODE=specify-preferred

	WINDOW_ID_IS_TAKEN() {
		: \
			&& [[   $(remote.omni.tmux list-windows -t=omni | grep "^${WINDOW_ID}:" | wc -l) -gt 0 ]] \
			&& [[ ! $(remote.omni.tmux list-windows -t=omni | grep "^${WINDOW_ID}:" | awk '{print $2;}' =~ ^${REMOTE_NAME}$) ]] \
			;
	}

	local FALLBACK_STARTING_POINT
	case ${MODE} in
		use-default       ) FALLBACK_STARTING_POINT=42 ;;
		specify-preferred ) FALLBACK_STARTING_POINT=69 ;;
	esac

	local I=0
	while WINDOW_ID_IS_TAKEN
	do
		echo "${REMOTE_NAME} tried to acquire window id ${WINDOW_ID}, but it is already in-use (trying $((${FALLBACK_STARTING_POINT}-${I})))" >&2
		WINDOW_ID=$((${FALLBACK_STARTING_POINT}-${I}))
		((I+=1))
		[[ ${I} -gt 10 ]] && WINDOW_ID= && break
	done

	echo ${WINDOW_ID}
}

#####################################################################

remote.omni.tmux new-window -t=omni-manager -dn 'harakiri' "
echo 'waiting for omni-manager to close'
while true
do
	sleep 5
	tmux -L ${OMNI_SOCKET} list-sessions 2>/dev/null | grep -v omni-manager | grep -qi omni || {
		echo 'no active sessions detected; killing omni-manager session'
		tmux -L ${OMNI_SOCKET} kill-session -t omni-manager
	}
done
"

while true
do
	#clear
	for REMOTE_NAME in $(remote.config.yq '.sessions | keys | .[]')
	do
		WINDOW_ID=$(get-unique-window-id)
		export WINDOW_ID__${REMOTE_NAME}=${WINDOW_ID}

		remote.omni.tmux list-windows -t=omni | awk '{print $2;}' | grep -q ${REMOTE_NAME} \
			&& continue

		printf "testing connection ${REMOTE_NAME}..."
		echo "testing connection ${REMOTE_NAME}..." &>>"${OMNI_LOGFILE}"
		scwrypts --name test --group remote --type zsh \
				-- \
				--name ${REMOTE_NAME} \
				--command 'command -v tmux' \
				&>>"${OMNI_LOGFILE}" \
			&& export CAN_CONNECT__${REMOTE_NAME}=true \
			|| export CAN_CONNECT__${REMOTE_NAME}=false \
			;

		[[ $(eval echo "\$CAN_CONNECT__${REMOTE_NAME}") =~ true ]] \
			&&   utils.colors.print bright-green " ✔\n" >&2 \
			|| { utils.colors.print bright-red   " ✖\n" >&2; continue; }

		remote.omni.tmux new-window \
			-t=omni:${WINDOW_ID} \
			-dn ${REMOTE_NAME} "
				source ~/.zshrc &>/dev/null
				TMUX='' scwrypts -n connect/${REMOTE_NAME} -- --type tmux
				echo 'connection closed'
				sleep 2
			"

		remote.omni.tmux list-window -t=omni | awk '{print $1;}' | grep -q '99:' && remote.omni.tmux kill-window -t omni:99

		remote.omni.tmux list-windows -t=omni | awk '{print $2;}' | grep -q ${REMOTE_NAME} \
			|| export CAN_CONNECT__${REMOTE_NAME}=false
	done

	#clear
	echo "connections:\n"
	{
		for REMOTE_NAME in $(remote.config.yq '.sessions | keys | .[]')
		do
			[[ $(eval echo "\$CAN_CONNECT__${REMOTE_NAME}") =~ true ]] \
				&& echo "${REMOTE_NAME}^$(eval echo "\$WINDOW_ID__${REMOTE_NAME}")^$(utils.colors.print bright-green connected)" \
				|| echo "${REMOTE_NAME}^-^$(utils.colors.print bright-red disconnected)" \
				;
		done
	} | column -ts '^'
	echo "\nPress ENTER to search again now (checks every 60 seconds)" >&2
	read -t 60
done