gulp-environment/src/config.js

Adds easy environment configuration and conditional piping to Gulp, based on NODE_ENV or parameters with yargs.

var fs = require('fs')
var findConfig = require('find-config')

function loadConfig(filename) {
  if (!fs.existsSync(filename)) {
    throw new Error(filename + ' could not be found!')
  }

  var contents = fs.readFileSync(filename)

  try {
    return JSON.parse(contents)
  } catch (e) {
    throw new Error('Could not parse ' + filename + ' as JSON!', e)
  }
}

function findAndLoadConfig(filename, options) {
  var config = findConfig(
    filename,
    Object.assign({}, { home: false }, options)
  )

  if (!config) {
    throw new Error('Could not find a ' + filename + ' file')
  }

  return loadConfig(config)
}

function loadFromDotfile() {
  return findAndLoadConfig('.gulpenvrc')
}

function loadFromManifest() {
  return findAndLoadConfig('package.json')['gulp-environment']
}

var defaultConfig = loadConfig(require.resolve('../.gulpenvrc'))
var config = {}

try {
  config = loadFromDotfile()
} catch (e) {
  try {
    config = loadFromManifest()
  } catch (e) {}
}

module.exports = Object.assign({}, defaultConfig, config)