remove all branches that are merged into current branch

script.md

To delete all local branches that are already merged into the currently checked out branch:

git branch --merged | grep -v "\*" | grep -v master | grep -v develop | xargs -n 1 git branch -d

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To delete all branches on remote that are already merged:

git branch -r --merged | grep -v master | sed 's/origin\///' | xargs -n 1 git push --delete origin