message: warn if not installed yet when running e2e tests
diff: @@ -3,8 +3,19 @@ set -e
  BASE_DIR=$(cd $(dirname $0) && pwd)
  pushd $BASE_DIR
  +
  +if [ ! -d "synapse/installations" ] || [ ! -d "node_modules" ]; then
  + echo "please, first run $BASE_DIR/install.sh"
  + exit 1
  +fi
  +
  has_custom_riot=$(node has_custom_riot.js $@)
  +if [ ! -d "riot/riot-web" ] && [ $has_custom_riot -ne "1" ]; then
  + echo "please provide an instance of riot to test against by passing --riot-url <url> or running $BASE_DIR/riot/install.sh"
  + exit 1
  +fi
  +
  stop_servers() {
  if [ $has_custom_riot -ne "1" ]; then
  ./riot/stop.sh
  