engagementgamelab/CivicSeed

'use strict'

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

    config.js

    - Configuration for Civic Seed using nconf, depending on environment
    - This script looks at the NODE_ENV environment variable to know
      what environment CivicSeed is running in.

      - 'development'     local development instance (default)
      - 'production'      production environment, generally Amazon S3
      - 'heroku'          remote testing environment, specifically Heroku

    - Configuration variables for each environment is stored in the
      associated `config/environment.json` file
    - Authentication credentials should NEVER be stored in these files
      because they could be made available through a public repository,
      like GitHub. Instead, they should ALWAYS be stored on the environment
      itself using environment variables.
    - See also README.md and documentation for more information.

 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

var rootDir = require('app-root-path')
var nconf = require('nconf')
var env = require('node-env-file')
var fs = require('fs')
var winston = require('winston')

// Read environment variables from an optional .env, if present
var envFile = rootDir + '/.env'
if (fs.existsSync(envFile)) {
  env(envFile, {verbose: false, overwrite: true})
}

var NODE_ENV = process.env.NODE_ENV || 'development'
var CONFIG_FILE = process.env.CONFIG_FILE || rootDir + '/config/' + NODE_ENV + '.json'

var json = JSON.parse(fs.readFileSync(rootDir + '/package.json', 'utf8'))

// Hierarchical configuration with nconf
nconf.argv().env().file({
  file: CONFIG_FILE
})

nconf.set('VERSION', json.version)
nconf.set('NODE_ENV', NODE_ENV)

// Get authentication credentials stored as environment variables.
nconf.set('EMAIL_USER', process.env.EMAIL_USER || '')
nconf.set('EMAIL_PW', process.env.EMAIL_PW || '')
nconf.set('EMAIL_TO', process.env.EMAIL_TO || '')
nconf.set('REDIS_PW', process.env.REDIS_PW || '')

// HEROKU ENVIRONMENT
// Environment variables for Redis and Mongo are pre-set by Heroku add-ons.
// These use slightly different names we parse them here and add them via nconf.
// Heroku still relies on the existence of the config_heroku.json file but unused settings are removed in it.
if (NODE_ENV === 'heroku') {
  winston.info('Configuring Heroku environment ...'.yellow)
  nconf.set('MONGO_URL', process.env.MONGOHQ_URL)

  // Set up RedisToGo on Heroku environment
  // See: https://devcenter.heroku.com/articles/redistogo#using-with-node
  var rtg = require('url').parse(process.env.REDISTOGO_URL)
  nconf.set('REDIS_HOST', rtg.hostname)
  nconf.set('REDIS_PORT', rtg.port)
  nconf.set('REDIS_PW', rtg.auth.split(':')[1])
}

module.exports = nconf