Is T-tube always mandatory after CBD exploration? How many days post operation generally t tubes should be kept for tract maturity? Is it 4 weeks post operation?

What are the indications in practice where primary closure without decompression can be safely attempted? Does infant feeding tube have less incidence of post tube removal bile leak leading to bile peritonitis? Is antegrade CBD stenting with traditional ercp stents followed by primary repair of cbd advisable for decompression to avoid T-tube related complications?