npm-check-unused/lib/state/state.js

Check unused dependencies.

'use strict'
const mergeOptions = require('merge-options')
const init = require('./init')
const debug = require('./debug')

const defaultOptions = {
  cwd: process.cwd(),
  nodeModulesPath: false,

  ignoreDev: false,
  devOnly: false,
  specials: '',
  debug: false,
  emoji: true,
  spinner: false,
  ignore: [],

  cwdPackageJson: {devDependencies: {}, dependencies: {}},

  packages: false,
  unusedDependencies: false,
  missingFromPackageJson: {}
}

function state (userOptions) {
  const currentStateObject = mergeOptions(defaultOptions, {})

  function get (key) {
    if (!currentStateObject.hasOwnProperty(key)) {
      throw new Error(`Can't get unknown option "${key}".`)
    }
    return currentStateObject[key]
  }

  function set (key, value) {
    if (get('debug')) {
      debug('set key', key, 'to value', value)
    }

    if (currentStateObject.hasOwnProperty(key)) {
      currentStateObject[key] = value
    } else {
      throw new Error(`unknown option "${key}" setting to "${JSON.stringify(value, false, 4)}".`)
    }
  }

  function inspectIfDebugMode () {
    if (get('debug')) {
      inspect()
    }
  }

  function inspect () {
    debug('current state', all())
  }

  function all () {
    return currentStateObject
  }

  const currentState = {
    get: get,
    set: set,
    all,
    inspectIfDebugMode
  }

  return init(currentState, userOptions)
}
module.exports = state