blt alias

function blt() {
  if [[ ! -z ${AH_SITE_ENVIRONMENT} ]]; then
    PROJECT_ROOT="/var/www/html/${AH_SITE_GROUP}.${AH_SITE_ENVIRONMENT}"
  elif [ "`git rev-parse --show-cdup 2> /dev/null`" != "" ]; then
    PROJECT_ROOT=$(git rev-parse --show-cdup)
  else
    PROJECT_ROOT="."
  fi

  if [ -f "$PROJECT_ROOT/vendor/bin/blt" ]; then
    $PROJECT_ROOT/vendor/bin/blt "$@"

  # Check for local BLT.
  elif [ -f "./vendor/bin/blt" ]; then
    ./vendor/bin/blt "$@"

  else
    echo "You must run this command from within a BLT-generated project."
    return 1
  fi
}