How can I delete all Git branches which have been merged?

Question

I have many Git branches. How do I delete branches which have already been merged? Is there an easy way to delete them all instead of deleting them one by one?

Answer 1

Write a script in which Git checks out all the branches that have been merged to master.

Then do git checkout master.

Finally, delete the merged branches.

for k in $(git branch -ra --merged | egrep -v "(^\*|master)"); do
  branchnew=$(echo $k | sed -e "s/origin\///" | sed -e "s/remotes\///")
  echo branch-name: $branchnew
  git checkout $branchnew
done

git checkout master

for k in $(git branch -ra --merged | egrep -v "(^\*|master)"); do
  branchnew=$(echo $k | sed -e "s/origin\///" | sed -e "s/remotes\///")
  echo branch-name: $branchnew
  git push origin --delete $branchnew
done