Delete local git branches that have been merged

git-clean-merged_old

#! /bin/bash

# deletes branches (other than `master` or `develop`) that have already been merged into your
# current branch. I prefer this: https://gist.github.com/ohnit/150cb10459328e4695956567da5840b8

confirm() {
  # call with a prompt string or use a default
  read -r -p "${1:-Are you sure? [y/N]} " response
  case "$response" in
    [yY][eE][sS]|[yY])
      true;;
    *)
      false;;
  esac
}

merged_branches() {
  # branches merged into the current branch (exclude master and develop)
  git branch --merged | grep -v '* \|master\|develop'

  # Deletes based on upstream branch deletion instead of merge
  # git branch -vv | awk '/: gone]/{print $1}'
}

branch_name="$(git symbolic-ref HEAD 2>/dev/null)" ||
branch_name="(unnamed branch)"     # detached HEAD

branch_name=${branch_name##refs/heads/}

if [ "$branch_name" != "master" ] && [ "$branch_name" != "develop" ]
then
  echo "You are not on master or develop!!!"
  echo "You are on this branch: $branch_name"

  confirm "Are you sure you want to continue? [y/N]" || exit 0
fi

echo
echo "This will delete the follow branches..."
merged_branches | xargs -I % echo "  %"

echo

confirm "Would you like to continue? [y/N]"
if [ $? -ne 0 ]
then
  echo "aborted"
  exit 1
fi

merged_branches | xargs git branch -d

echo
echo "Done!"