Remove local git branches that have been merged

prune_git_branches.sh

#/usr/local/bin/zsh
# Credit to http://snippets.freerobby.com/post/491644841/remove-merged-branches-in-git for the script on which this is based

current_branch=$(git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')
if [ "$current_branch" != "master" ]; then
  echo "WARNING: You are on branch $current_branch, NOT master."
fi
echo "Fetching merged branches..."
git remote prune origin
local_branches=$(git branch --merged | grep -v 'master$' | grep -v "$current_branch$")
if [ -z "$local_branches" ]; then
  echo "No existing branches have been merged into $current_branch."
else
  echo "This will remove the following branches:"
  if [ -n "$local_branches" ]; then
    echo "$local_branches"
  fi
  echo "###################"
  echo "staging and production will not be deleted"
  read "choice?Continue? (y/n): "
  echo ""
  if [[ "$choice" == "y" ]] || [[ "$choice" == "Y" ]]; then
    # Remove local branches
    git branch -d `git branch --merged | grep -v 'master$' |grep -v "production" |grep -v "staging"| grep -v "$current_branch$" | sed 's/origin\///g' | tr -d '\n'`
  else
    echo "No branches removed."
  fi
fi