Update revisions.

pbu.zsh

function pbu() {
  # save branch to go back later
  (git rev-parse --abbrev-ref HEAD)
  current_branch=$?

  # check for changes to decide if we want to stash them
  (git diff-index --quiet HEAD --)
  changes_present=$?

  if [[ $changes_present -ne 0 ]]; then
    echo 'Detected work, stashing the changes'
    git stash
  fi

  git checkout development &&
  git fetch &&
  git reset --hard origin/development &&
  bundle update

  # detect if Gemfile.lock changed and therefore push is needed
  if ! git diff-index --quiet HEAD -- Gemfile.lock; then
    echo 'Detected changes in Gemfile.lock, will commit and push'
    git add Gemfile.lock &&
    git commit -m "Update revisions" &&
    git push &&
  else
    echo 'No changes after bundle update, nothing to push'
  fi

  git checkout $current_branch

  if [[ $changes_present -ne 0 ]]; then
    echo 'Restoring work from stash'
    git stash pop
  fi
}