README.md

Usage:

$ merged-branches.sh > DELETE-ME # Get all merged branches on the origin remote and put them into the DELETE-ME file
$ branch-owners.sh < DELETE-ME | sort > BRANCH-OWNERS # Map all the branches we just grabbed to the most recent author
$ delete-branches.sh < DELETE-ME # Actually delete all of the branches from origin
$ stale-branches.sh # Logs stale branches (those older than 6 months) to STALE and the rest to FRESH

branch-owners.sh

#!/bin/bash

main() {
  local deployment_email='[email protected]'
  while read BRANCH
  do
    local owner=$(git log --no-merges --format=tformat:%ae origin/${BRANCH} | grep -v ${deployment_email} | head -n 1)
    echo "${owner}        ${BRANCH}"
  done
}

main $@

delete-branches.sh

#!/bin/bash

main() {
  echo "Failed to delete:" > FAILED-TO-DELETE

  while read branch
  do
    local result

    echo "DELETING ${branch}..."
    result=$(git push origin --delete ${branch} 2>&1)
    if [ $? -eq 0 ]; then
      echo "  Delete success"
    else
      echo "  Delete failed"
      echo "Branch: ${branch}" >> FAILED-TO-DELETE
      echo -e "${result}\n" >> FAILED-TO-DELETE
    fi
  done
}

main $@

merged-branches.sh

#!/bin/bash

set -e

main() {
  usage() { echo "Usage: merged-branches" 1>&2; }

  git branch $args --merged |
    grep origin |
    grep -v '>' |
    grep -v develop |
    grep -v master |
    xargs -L1 |
    cut -d"/" -f2- |
    sort
}

main $@

stale-branches.sh

#!/usr/bin/env bash

function main() {
  local cutoff=$(date -d '-6 months' +'%s')
  local branches=$(git branch --remote |
    grep origin |
    grep -v develop |
    grep -v master |
    xargs -L1 |
    cut -d"/" -f2- |
    sort)

  [ -f STALE ] && rm STALE
  [ -f FRESH ] && rm FRESH

  for branch in $branches; do
    echo "Checking ${branch}"
    local timestamp=$(git log origin/${branch} --pretty=tformat:%at | head -n1)
    local datetime=$(date -d@${timestamp} +'%Y-%m-%d %H:%M:%S')
    if [ $cutoff -gt $timestamp ]; then
      echo -e "${datetime}\t${branch}" >> STALE
    else
      echo -e "${datetime}\t${branch}" >> FRESH
    fi
  done
}

main $@