Delete all branches that are already merged into master, both locally, and optionally in a specified remote. Execute "git rm-merged -h" for details.

git-rm-merged.sh

#!/bin/bash

if [ "$1" == "-h" ]; then
	echo "Usage: git rm-merged [remote]"
	echo "Removes any local branches already merged into master"
	echo "If a remote is supplied, it also removes any branches on that remote that have"
	echo "been merged into that remote's master branch."
	exit 1
fi

# get the branch the user was already on
b="$(git symbolic-ref HEAD 2>/dev/null)";
if [ -n "$b" ]; then
	b="${b##refs/heads/}";
fi

# can't delete the branch you're already on!
git checkout master

remote=$1
excludes='master'

if [ "$remote" != "" ]; then

	for branch in `git branch -r --merged ${remote}/master | grep $remote`
	do
		branch=${branch:${#remote} + 1}
		should_exclude=false

		for exclude in $excludes
		do
			if [ $branch == $exclude ];
			then
				should_exclude=true
			fi
		done

		if ! $should_exclude ;
		then
			git push $remote :$branch
		fi
	done
fi

# Exclude the current branch (master), which is marked with a * in the output of git branch.
for branch in `git branch --merged | grep -v "\*"`
do
	should_exclude=false

	for exclude in $excludes
	do
		if [ $branch == $exclude ];
		then
			should_exclude=true
		fi
	done

	if ! $should_exclude ;
	then
		git branch -d $branch
	fi	
done

if [ -n "$b" ]; then
	git checkout $b
fi