#!/bin/sh

if [ "$1" = '-' ]; then
	session="$(cat -)"
	if [ -z "$session" ]; then
		exit 0
	fi
	set -- "$session"
fi

if [ ! -d "$1" ]; then
	exit 1
fi

if ! session="$(tmux ls -f "#{==:#{session_path},$1}" -F '#S' 2>/dev/null | grep ^)"; then
	session="$(tmux new -dc "$1" -PF'#S')"
fi

if [ -z "$TMUX" ]; then
	tmux attach-session -t "$session"
else
	tmux switch-client -t "$session"
fi