add join feature

4 jobs for master in 3 minutes and 43 seconds
Status Name Job ID Coverage
  Test
passed package #2899
r-base-biosp

00:00:38

passed package-devel #2900
r-devel-biosp

00:00:42

passed package-mac #2902
Mac R

00:03:27

canceled package-windows #2901
win10 R binaries

00:03:40