Delete merged git branches locally and on remote

git-rm-merged

#!/bin/bash
# Remove merged git branches locally and on remote(s)

set -e

# Script constants
BRANCH_WHITELIST="(\*|master|other-special-branches)"
REMOTES="origin"  # Add more remotes here as space-separated list

echo "Deleting merged branches locally"
git branch --merged master \
    | egrep -v "$BRANCH_WHITELIST" \
    | xargs -r git branch -d

# Delete merged branches from each remote.
for remote in $REMOTES; do
    echo "Deleting merged branches from $remote"
    git fetch "$remote" --prune
    for branch in $(git branch -r --merged master \
                        | grep "$remote" \
                        | egrep -v "$BRANCH_WHITELIST"); do
        git push "$remote" --delete "${branch#*/}"
    done
done