Git Delete Merged Branches

git-deletebranches.sh

#!/bin/bash

MAIN=${1:-develop}
BRANCHES=$(git branch --merged $MAIN | grep -v -e 'master\|staging\|develop\|\*')

echo Branches merged into $MAIN:
echo $BRANCHES

read -p "Delete these branches (y/n)? " answer

if [ "$answer" = "n" ]; then echo aborting && exit; fi

echo $BRANCHES | xargs -n 1 git branch -d

I use something similar:

alias gmgd="git branch -a --merged | sed 's/^[* ] //' | awk '{print \$1}' | xargs git show -s --pretty=format:'%an %d %cr' | sort | grep -v HEAD"
alias gcln="git branch --merged | grep -v -e 'master' -e 'develop' -e 'release-candidate' -e '*' | xargs git branch -d"