git-clean-local-branches

#!/bin/bash
#
# Copyright(c) 2018 Asit Dhal.
# Distributed under the MIT License (http://opensource.org/licenses/MIT)
#

LIGHT_BLUE='\033[1;34m'
RED='\033[0;31m'
NC='\033[0m' # No Color
INTERACTIVE=""
FORCE_DELETE=""
MASTER="master"
while [[ $# -gt 0 ]]
do
  key="$1"
  case $key in
    -f)
    FORCE_DELETE="y"
    shift
    ;;
    -i)
    INTERACTIVE="i"
    shift
    ;;
    -fi|-if)
    INTERACTIVE="i"
    FORCE_DELETE="y"
    shift
    ;;
    -h)
    echo "$(basename $0) -i Intecative deletion of local branches"
    echo "$(basename $0) -f Force delete the branch(es)"
    echo "$(basename $0)    List local branches with creation and last update date"
    exit
    ;;
    *)
    shift
  esac
done

current_branch=$(git branch | grep "*")
current_branch=${current_branch/* /}

if [ "${current_branch}" != "${MASTER}" ]; then
  printf "Please change the current branch to ${LIGHT_BLUE}${MASTER}${NC}\n"
  exit
fi

if ! git diff-files --quiet; then 
  printf "you have unstaged changes. $(basename $0) needs a clean working index\n"
  git diff-files --name-status
  printf "Please commit or stash them.\n"
  exit
fi

if ! git diff-index --cached --quiet HEAD; then
  printf "your index contains uncommitted changes. $(basename $0) needs a clean working index\n"
  git diff-index --cached --name-status HEAD
  printf "Please commit or stash them.\n"
  exit  
fi

for brnch in $(git branch | sed /\*/d); do
  created_commit_id=$(git merge-base ${brnch} ${MASTER})
  created_date=$(git log --pretty=format:"%ad" --date=short -n 1 ${created_commit_id})
  created_ago=$(git log --pretty=format:"%cr" --date=short -n 1 ${created_commit_id})
  last_updated_date=$(git log --pretty=format:"%ad" --date=short -n 1 ${brnch})
  updated_before=$(git log --pretty=format:"%cr" --date=short -n 1 ${brnch})
  commit_message_subject=$(git log --pretty=format:'%s' -n 1 ${brnch})
  printf "Branch name         : ${brnch} \n"
  printf "Created on          : ${created_date}${RED}(${created_ago})${NC}\n"
  printf "Last updated on     : ${last_updated_date}${RED}(${updated_before}${NC})\n"
  printf "Last commit message : ${commit_message_subject}\n"
  if [ "${INTERACTIVE}" == "i" ]; then
    printf "${LIGHT_BLUE}Delete the branch, followed by [y/n]?${NC} "
    read ip
    if [ "$ip" == "y" ]; then
      if [ "${FORCE_DELETE}" == "y" ]; then
        git branch -D ${brnch}
      else
        git branch -d ${brnch}
        if [ $? -ne 0 ]; then
          printf "${LIGHT_BLUE}Run with -fi command to delete ${brnch}${NC}\n"
        fi
      fi
    fi
  fi
done