Delete merged branches with `git bam`

.gitconfig.sh

[alias]
  bam  = "!source ~/.githelpers && delete_local_merged_branches"
  bamr = "!source ~/.githelpers && delete_remote_merged_branches"

.githelpers.sh

#!/bin/bash

function delete_local_merged_branches() {
  git branch --merged master | grep -v master | xargs git branch -d
}

function delete_remote_merged_branches() {
  for BRANCH in `git branch -r --merged origin/master |\
                 grep -v master |\
                 cut -d/ -f2-`
  do
    git push origin :$BRANCH
  done
}

README.md

Delete all local branches that have been merged into master:

$ git bam

Delete all remote branches that have been merged into origin/master:

$ git bamr