Interactively delete local branches (git)

git-delete-interactive-local-branch.sh

#!/bin/bash

################################################################################
# Interactive Git Delete
# ------------------------------------------------------------------------------
# Author:            Joao Carmo
# License:                  MIT
# ------------------------------------------------------------------------------
# This script will list all available local branches and you can select one or
# more to delete using numbers (from the list).
################################################################################

# Variables / Settings
current_b=$(git rev-parse --abbrev-ref HEAD 2>/dev/null)
local_b=$(git branch 2>/dev/null | awk -F ' +' '! /\(no branch\)/ {print $2}')
master_b='master'
branches=()
base_dashes=18
RED='\033[0;31m'
GREEN='\033[0;32m'
NOCOLOR='\033[0m'
DASH='*'
SEPR='**'
num=0
zero=0
TOTAL=0
ERADICATE=()

# Functions
function repl {
  local ts=$(printf "%${2}s")
  printf %s "${ts// /$1}"
}

function listb {
  IFS=$'\n' read -rd '' -a branches <<<"$1"
  for branch in "${branches[@]}"; do
    if [ "$branch" = "$current_b" ]; then
      HIGHLIGHT=$GREEN
    elif [ "$branch" = "$master_b" ]; then
      HIGHLIGHT=$RED
    else
      HIGHLIGHT=$NOCOLOR
    fi
    num=$(($num + 1))
    printf "     %5s   ${HIGHLIGHT}%s${NOCOLOR}\n" "[$num]" "$branch"
  done
  TOTAL=$num
  printf "\n"
}

function deleteb {
  num=0
  printf "  Select the branches for deletion: "
  read user_input_raw
  user_input=$(printf "$user_input_raw" | sed -E 's/[^0-9]+/ /g')
  user_input_s=$(printf "$user_input" | xargs -n1 | sort -g | xargs)
  IFS=$' ' read -rd '' -a choices <<<"$user_input_s"
  printf "\n"
  printf "  The following local branch(es) will be deleted:\n"
  for raw_choice in "${choices[@]}"; do
    choice=$(printf $raw_choice | tr -d ' ')
    if [ ! -z "$choice" ] && [ "$choice" -gt "$zero" ]; then
      u_choice=$(printf $choice | tr -d '\n')
      u_branch=${branches[$(($choice - 1))]}
      if [ "$u_choice" -le "$TOTAL" ] && [ ! "$u_branch" = "$master_b"  ]; then
        printf "     %5s   %s\n" "[$u_choice]" "$u_branch"
        num=$(($num + 1))
        ERADICATE+=("$u_branch")
      fi
    fi
  done
  printf "\n"
  if [ "$num" -gt "0" ]; then
    printf "  Are you sure? (y/N): "
    read confirm
    printf "\n"
    if [ "$confirm" = "y" ]; then
      printf "  Deleting:"
      printf "\n\n"
      for d_branch in "${ERADICATE[@]}"; do
        printf "    %s... " "$d_branch"
        git branch -D "$d_branch" -q
        exit_code=$?
        if [ "$exit_code" -eq "0" ]; then
          printf "Done\n"
        else
          printf "Failed\n"
        fi
      done
    else
      printf "  Cancelled"
    fi
  else
    printf "     %5s   %s" "[x]" "No valid choices available."
  fi
  printf "\n"
}

# Main
if [ ! -z "$current_b" ] && [ ! -z "$local_b" ]; then
  # Display the current branch
  branch_str_len=${#current_b}
  printf "${SEPR}"
  repl "${DASH}" $(($base_dashes + $branch_str_len))
  printf "${SEPR}\n"
  printf "${SEPR} Current branch: ${GREEN}%s${NOCOLOR} ${SEPR}\n" "$current_b"
  printf "${SEPR}"
  repl "${DASH}" $(($base_dashes + $branch_str_len))
  printf "${SEPR}\n"
  # List local branches
  printf "\n"
  printf "  Local branches:\n"
  listb "$local_b"
  deleteb
  printf "\n"
else
  >&2 printf "Error: Not in a .git repository\n"
  exit 1
fi