Z's Git Delete Gone Branches

z-git-delete-gone-branches.sh

#!/bin/bash

# set -uex

set -ue

# First, we delete any fully-merged branches that are gone

GONE_BRANCHES=()
while read -r branch; do
    GONE_BRANCHES+=("${branch}")
done < <(git branch -vv | cut -c3- | awk '/: gone]/{print $1}')

if [[ ${#GONE_BRANCHES[@]} -gt 0 ]]; then
  # delete all branches from GONE_BRANCHES
  for branch in "${GONE_BRANCHES[@]}"; do
    echo git branch -d "${branch}"
    git branch -d "${branch}" || echo "Branch ${branch} is not fully merged"
  done
fi

: ${NO_Z_GIT_PROMPT:=}

if [[ "${NO_Z_GIT_PROMPT}" == "true" ]]; then
  exit 0
fi

# Then we recalculate gone branches. These are, presumably,
# not fully merged, and we will prompt one by one

GONE_BRANCHES=()
while read -r branch; do
    GONE_BRANCHES+=("${branch}")
done < <(git branch -vv | cut -c3- | awk '/: gone]/{print $1}')

if [[ ${#GONE_BRANCHES[@]} -gt 0 ]]; then
    for branch in "${GONE_BRANCHES}"; do

        read -n 1 -p "Delete branch '${branch}'? [y/N] " answer
        echo  # newline

        # default to 'n' if no input
        answer=${answer:-n}

        if [[ "$answer" =~ ^[yY]$ ]]; then
            git branch -D "${branch}"
        fi
    done
fi