#!/bin/sh

host=`hostname`

tmux has-session -t $host
if [ $? -eq 1 ]; then
	# no session, creating in daemon mode
	tmux -u new-session -s $host -d
	echo "created new session: $host"
fi

# session exists or we just created it, now figure out whether
# to attach to session $host or create a new clone of it

attached=`tmux list-sessions | grep attached | grep ^$host:`
if [ ".$attached" = "." ]; then
	# nothing attached to session $host, so attach to it
	echo "attaching to session: $host"
	exec tmux -u attach-session -t $host
else
	# session $host is attached, so create a new one
	# we need a new name for this clone. cheap: name-pid
	sessionname=$host-$$

	echo "creating new session grouped to $host: $sessionname"
	tmux -u new-session -t $host -s $sessionname

	# getting here means client detached. delete this session
	echo "deleting clone session: $sessionname"
	tmux -u kill-session -t $sessionname
fi