ninjs-lodash/lib/libs/pkgup.js

lodash wrapper + utils

'use strict'

const _ = require('lodash')
const path = require('path')
const fs = require('fs')

module.exports = pkgup
_.mixin({ pkgup: pkgup })

// returns nearest parent package.json object
function pkgup() {
  let main_dir = path.parse(require.main.filename).dir
  let main_pkg = path.join(main_dir, 'package.json')
  let srcs = main_dir.split(path.sep)
  let mexists = !_.isError(_.attempt(fs.accessSync, main_pkg, fs.constants.R_OK)) ? true : false
  let found = mexists ? main_pkg : null

  // keep truncating path until at drive root or package.json found
  while(srcs.pop() && !found)
  {
    let src = path.join(_.join(srcs, path.sep), 'package.json')
    let exists = !_.isError(_.attempt(fs.accessSync, src, fs.constants.R_OK)) ? true : false
    if(exists) found = src
  }

  if(!found) return

  let pkg = _.attempt(require, found)
  if(!pkg || _.isError(pkg)) return

  return _.assign(pkg, { "_root": path.parse(found).dir, "_path": found })
}