Automatically remove old branches that haven't been touched in a while

branch_killer.sh

#!/usr/bin/env bash

######################################################################
# This script delets all branches that have not been commited to in  #
# the last 100 days. This is non reversable, so make sure you know   #
# you are doing.                                                     #
# Author: TheToddLuci0                                               #
######################################################################

echo "" > deleted.txt
echo "" > toBeDeleted.txt

git fetch -a
git for-each-ref --sort=committerdate --format='%(committerdate:raw) %(refname:short)' > git.txt
# To change how long ago to begin purging, change the 100 below to your desired number of days.
hundred_days_ago=$(date -d 'now - 100 days' +%s)
while read p; do
  STR=$p
  STR2=$p
  DATE=$(echo $STR | cut -d' ' -f 1)
  BRANCH=$(echo $STR2 | cut -d' ' -f 3)
  SUB=${BRANCH:7}
  TYPE=${BRANCH:7:8}
  REF=${BRANCH:0:7}
# This line prints the difference in time between the last commit and the cut off date (in seconds). Usefull if you are deleting several thousand branches.
  echo  $(( DATE - hundred_days_ago )) 
  if [ $DATE -lt $hundred_days_ago ]; then
    if [ $REF = "origin/" ]; then
      if [ $TYPE != "release/"  ]; then
# Uncomment the line below to delete the old branches. 
#        git push --delete origin $SUB |& tee -a deleted.txt
        sleep .5
# Uncomment the line below to list all the branches that would be deleted.
        echo "$SUB is older than 100 days" |& tee -a toBeDeleted.txt
      else
        echo "**********************************************"
        echo "    Skipping release $SUB"
        echo "**********************************************"
      fi
      if [ -f .git/packed-refs.lock ]; then
        echo "Looks like git broke again. I'll fix it."
        sleep 15
        rm .git/packed-refs.lock
      fi
    fi
  fi
done <git.txt