datahub-client/lib/utils/config.js

APIs for interacting with DataHub

const {homedir} = require('os')
const path = require('path')
const fs = require('fs')

const nconf = require('nconf')
const mkdirp = require('mkdirp')

const file = process.env.DATAHUB_JSON ?
  path.resolve(process.env.DATAHUB_JSON) :
  path.resolve(homedir(), '.config/datahub/config.json')

function setup() {
  nconf.argv()
    .env()
    .file({
      file
    })

  // This is the object that you want to override in your own local config
  nconf.defaults({
    api: 'https://api.datahub.io',
    domain: 'https://datahub.io',
    token: '',
    email: '',
    username: ''
  })
}

setup()

function save(data) {
  mkdirp.sync(path.resolve(homedir(), '.config/datahub'))
  fs.writeFileSync(file, JSON.stringify(data, null, 2))
}

/**
 * Reads the config file
 *
 * @return {Object}
 */
function read() {
  let existing = {}
  try {
    existing = fs.readFileSync(file, 'utf8')
    existing = JSON.parse(existing)
  } catch (err) {}

  return existing
}

/**
 * Merges the `data` object onto the
 * JSON config stored in `.datahub.json`.
 *
 * (atomic)
 * @param {Object} data
 */
function merge(data) {
  const cfg = Object.assign({}, read(), data)
  save(cfg)
}

module.exports = {
  get: nconf.get.bind(nconf),
  set: nconf.set.bind(nconf),
  reset: nconf.reset.bind(nconf),
  merge,
  setup
}