#!/usr/bin/env bash

flow version > /dev/null 2>&1
uses_global_flow=$?

yarn flow version > /dev/null 2>&1
uses_yarn=$?

npm run flow version > /dev/null 2>&1
uses_npm=$?

if [ $uses_global_flow -eq 0 ]; then
  flow
elif [ $uses_yarn -eq 0 ]; then
  yarn flow
elif [ $uses_npm -eq 0 ]; then
  npm run flow
else
  echo "Error! Neither yarn nor npm provide flow.  Consider running yarn install or npm install"
  exit 1
fi