A bash script to clean up remote branches that pile up. Use '-r <remote>' to specify a remote such as 'origin'.

clean_remote_git_branches.sh

#!/bin/bash
_check_options() {
  while test $# -gt 0; do
    case "$1" in
      -h|--help)
        echo "options:"
        echo "-h, --help                show brief help"
        echo "-r, --remote=ORIGIN       remote repository to target"
        exit 0
        ;;
      -o)
        shift
        if test $# -gt 0; then
          remote=$1
          if [[ $(git remote | grep $1 -c) -eq 0 ]]; then
            echo "Remote repository not found."
            exit 1
          fi
        else
          echo "No remote repository specified."
          exit 1
        fi
        shift
        ;;
      *)
        break
        ;;
    esac
  done
}

# default remote to 'origin'
remote='origin'
_check_options $@
read -p "Checking out master, and performing a pull to obtain current HEAD. Continue? [Y/n]" prompt
if [[ $prompt == "n" ]]; then
  echo 'Exiting.'
  exit
fi
git checkout master && git pull > /dev/null 2>&1
if [[ $? -eq 0 ]]; then
  # get merged remotes, ignore master!
  branches=$(git branch -r --merged $remote | grep -v 'master')
  branches_cleaned=0
  for branch in $branches ; do
    # necessary because remote delete wants branch name only!
    base_branch=$(basename $branch)
    last_edit=$(git log -1 --format=%cd $branch)
    echo
    echo "Branch: $base_branch"
    echo "Last commit: $last_edit"
    echo "Delete? [Y/n/a]"
    read prompt
    if [[ $prompt == "n" ]]; then
      continue
    elif [[ $prompt == "a" ]]; then
      echo 'Exiting.'
      exit
    else
      ((branches_cleaned++))
      echo
      echo "Deleting $base_branch"
      echo
      git push $remote :$base_branch
      if [[ $? -ne 0 ]]; then
        echo "Error deleting remote branch, exiting."
        exit 1
      fi
    fi
  done

  if [[ $branches_cleaned -gt 0 ]]; then
    echo "$branches_cleaned Branches cleaned."
    read -p "Prune remote: $remote? [Y/n]" prompt
    if [[ $prompt == "n" ]]; then
      echo 'Exiting.'
      exit
    else
      git remote prune $remote
    fi
  fi
fi