index.js

/* eslint-disable global-require */

'use strict'

const logger = require('winston')
const semver = require('semver')
const pkg = require('./package.json')

// validate Node version requirement
const runtime = {
  expected: semver.validRange(pkg.engines.node),
  actual: semver.valid(process.version)
}
const valid = semver.satisfies(runtime.actual, runtime.expected)
if (!valid) {
  throw new Error(
    `Expected Node.js version ${runtime.expected}, but found v${runtime.actual}. Please update or change your runtime!`
  )
}

const type = process.env.PROCESS_TYPE

logger.info(`Starting '${type}' process`, { pid: process.pid })

if (type === 'web') {
  require('./web')
} else if (type === 'twitter-stream-worker') {
  require('./worker/twitter-stream')
} else if (type === 'social-preprocessor-worker') {
  require('./worker/social-preprocessor')
} else {
  throw new Error(
    `${type} is an unsupported process type. Use one of: 'web', 'twitter-stream-worker', 'social-preprocessor-worker'!`
  )
}