Check for out-of-date branches in a git-flow style branch system

cherry_compare.sh

function cherry_compare() {
  echo 'Out-of-date branch check'
  
  echo '[master -> qa]'
  git cherry -v qa master
  
  echo '[qa -> stage]'
  git cherry -v stage qa
  
  echo '[stage -> stable]'
  git cherry -v stable stage
}

$ cherry_compare
Out-of-date branch check
[master -> qa]
... commits in master not in qa ...
[qa -> stage]
... commits in qa not in stage ...
[stage -> stable]
... commits in stage not in stable ...