# Find a free port and return it
#
# example: port=$(ynh_find_port 8080)
#
# usage: ynh_find_port begin_port
# | arg: begin_port - port to start to search
ynh_find_port () {
	port=$(echo "$1" | sed 's/[^0-9]//g')	# Eliminate all non-digit characters
	test -n "$port" || ynh_die "The argument of ynh_find_port must be a valid port."
	while ! sudo yunohost app checkport $port --quiet       # Check if the port is free
	do
		port=$((port+1))	# Else, pass to next port
	done
	echo $port
}