Deletes branches merged with <branch>

delete_merged_branches.sh

#!/bin/bash

function usage()
{
    printf "Usage:\n\n"
    printf "./delete_merged_branches <branch>\n\n"
}

if [ "$1" == "" ]; then
    usage
    exit 0
fi

in_branch="$(git branch | grep \* | cut -d ' ' -f2)"
out_branch=$1

git checkout $out_branch;
git pull;
git branch --merged | grep -v $out_branch | xargs git branch -D;

git checkout $in_branch;

@dflima, add a git pull

git checkout $out_branch;
git pull;
git branch --merged | grep -v $out_branch | xargs git branch -D;

Ignore this (is http://stevenharman.net/git-clean-delete-already-merged-branches version?), use this: https://gist.github.com/schacon/942899

For clean projects using /feature or /fix.

$ git fetch --prune;
$ git branch --remote --merged |
    grep origin |
    grep -v '>' |
    grep -v master |
    grep -v develop |
    xargs -L1 |
    cut -d"/" -f2- |
    xargs git push origin --delete;

@caiotava nice approach, thanks!

@webysther that's a nice feature, but I don't want to delete remote branches. Maybe I can include that as an option. :)