truffle.js

const truffleConfig = require('@gnosis.pm/util-contracts/src/util/truffleConfig')

const DEFAULT_GAS_PRICE_GWEI = 5
const DEFAULT_GAS_LIMIT = 6721975
const DEFAULT_MNEMONIC = 'candy maple cake sugar pudding cream honey rich smooth crumble sweet treat'

// Load env vars
require('dotenv').config()

// Get the mnemonic
const privateKey = process.env.PK
let mnemonic = process.env.MNEMONIC
if (!privateKey && !mnemonic) {
  mnemonic = DEFAULT_MNEMONIC
}

// Solc
const compatibilityTruffle4 = true
let solcUseDocker, solcVersion
if (!compatibilityTruffle4) {
  // Use truffle 5
  solcUseDocker = process.env.SOLC_USE_DOCKER === 'true' || false
  solcVersion = '0.5.3'
}

// Gas price
const gasPriceGWei = process.env.GAS_PRICE_GWEI || DEFAULT_GAS_PRICE_GWEI

// Gas limit
const gas = process.env.GAS_LIMIT || DEFAULT_GAS_LIMIT

// Allow to add an aditional network (useful for docker-compose setups)
//  i.e. NETWORK='{ "name": "docker", "networkId": "99999", "url": "http://rpc:8545", "gas": "6700000", "gasPrice": "25000000000"  }'
let aditionalNetwork = process.env.NETWORK ? JSON.parse(process.env.NETWORK) : null

module.exports = {
  ...truffleConfig({
    mnemonic,
    privateKey,
    gasPriceGWei,
    gas,
    aditionalNetwork,
    optimizedEnabled: false,
    solcUseDocker,
    solcVersion,
    compatibilityTruffle4
  }),
  // https://github.com/mochajs/mocha/wiki/Using-mocha-programmatically#set-options
  mocha: {

  }
}