deleting old branches

# remove old local branches last updated > 2 months ago
for k in $(git branch | sed /\*/d); do 
  if [ -n "$(git log -1 --before='2 months ago' -s $k)" ]; then
    git branch -D $k
  fi
done

# list branches merged to master
git branch --merged master | grep -v "\* master"

# delete branches merged to master
git branch --merged master | grep -v "\* master" | xargs -n 1 git branch -d