#!/usr/bin/env bash

# Removes old Git branches and does other cleanup
#
# Usage:
#   git-cleanup [--force]
#
# See explanation here: http://erikaybar.name/git-deleting-old-local-branches/
#
# Author: Artem Sapegin, sapegin.me
# License: MIT
# https://github.com/sapegin/dotfiles

# Exit on any failed command
set -e

CYAN="$(tput setaf 6)"
UNDERLINE="$(tput sgr 0 1)"
NOCOLOR="$(tput sgr0)"

function header() { echo -e "\n$UNDERLINE$CYAN$1$NOCOLOR\n"; }

function branches() {
  git branch -vv | grep 'origin/.*: gone]' | awk '{print $1}'
}

if [[ "$1" != "--force" ]]; then
  branches
  exit 1
fi

# Delete all unreachable objects from the object database
header "Deleting unreachable objects..."
git prune

# Delete all stale remote-tracking branches, these branches have already been
# removed from the remote repository, but are still locally available in "remotes/".
header "Deleting stale remote-tracking branches..."
git remote prune origin
echo "Done."

# Delete branches for which remote branches were removed
header "Deleting branches with no longer existing remote branches..."
branches | xargs git branch -D