Delete all local branch that has not received any commits for a while

sh

#!/bin/sh
date=$1
delete_local_branch () {  
   if [[ "$date" == "" ]]; then
      echo "Missing date!"
      exit
   fi
   for k in $(git branch | sed /\*/d); do
      if [ -z "$(git log -1 --since='$date' -s $k)" ]; then
         local_branch_name=$(echo $k | sed -e "s/origin\///")
         echo deleting branch: $local_branch_name
         git branch -d $local_branch_name
      fi
   done
}

delete_local_branch

Somehow, using this script directly

for k in $(git branch | sed /\*/d); do
  if [ -z "$(git log -1 --since='2020-07-30 00:00:00' -s $k)" ]; then
    local_branch_name=$(echo $k | sed -e "s/origin\///")
    echo deleting branch: $local_branch_name
# use -D instead if the branch didnt merge yet
    git branch -d $local_branch_name
    sleep 1
fi
done