Clear stale branches script

clear_stale_branches.sh

#!/usr/bin/env bash
set -e

SYNC_BRANCH="master"
CURRENT_BRANCH=$(git branch --show-current)
if [ "$SYNC_BRANCH" != "$CURRENT_BRANCH" ]; then
 echo "ERROR: You should be on '$SYNC_BRANCH' branch to continue"
 exit 1
fi

if [ "$1" = "--delete" ]; then
  git branch -r --merged | grep --invert-match $SYNC_BRANCH | grep origin | sed 's/origin\///' | xargs -n 1 git push --delete origin
  git branch --merged | grep --extended-regexp --invert-match "(^\*|$SYNC_BRANCH)" | xargs -n 1 git branch --delete
else
  echo "Deleting merged remote branches. Protected branch is '$SYNC_BRANCH'. This branches will be deleted. Does it look correct?. If so, rerun script with --delete"
  echo "Remote:"
  git branch -r --merged | grep --invert-match $SYNC_BRANCH | grep origin | sed 's/origin\///' | xargs -n 1 printf "%s "
  #git branch -r --merged | grep -v master | sed 's/origin\///' | xargs -n 1 git push --delete origin
  printf "\nLocally:\n"
  git branch --merged | grep --extended-regexp --invert-match "(^\*|$SYNC_BRANCH)" | xargs -n 1 printf "%s "
fi