Script to delete branches older than a certain date

delete_branches_older_than.sh

#!/bin/sh

date=$1
DRY_RUN=1

for branch in $(git branch -a | sed 's/^\s*//' | sed 's/^remotes\///' | grep -v 'master$'); do
  if [[ "$(git log $branch --since $date | wc -l)" -eq 0 ]]; then
    if [[ "$branch" =~ "origin/" ]]; then
      local_branch_name=$(echo "$branch" | sed 's/^origin\///')
      if [[ "$DRY_RUN" -eq 1 ]]; then
        echo "git push origin :$local_branch_name"
      else
        git push origin :$local_branch_name
      fi
    else
      if [[ "$DRY_RUN" -eq 1 ]]; then
        echo "git branch -D $branch"
      else
        git branch -D $branch
      fi
    fi
  fi
done