Delete old git branches locally and remote

delete-old-branches.sh

#!/bin/bash

ECHO='echo '
for branch in $(git branch -a | sed 's/^\s*//' | sed 's/^remotes\///' | grep -v 'master\|develop\|main'); do
  if ! ( [[ -f "$branch" ]] || [[ -d "$branch" ]] ) && [[ "$(git log $branch --since "3 months ago" | wc -l)" -eq 0 ]]; then
    local_branch_name=${branch/'origin/'/''}
    git branch -d "${local_branch_name}"
    git push origin --delete "${local_branch_name}"
  fi
done