How to use the nopt.invalidHandler function in nopt

*/
/*jshint strict:false */

var debug = process.env.DEBUG_JSBEAUTIFY || process.env.JSBEAUTIFY_DEBUG ? function() {
    console.error.apply(console, arguments);
} : function() {};

var fs = require('fs'),
    cc = require('config-chain'),
    beautify = require('../index'),
    mkdirp = require('mkdirp'),
    nopt = require('nopt'),
    glob = require('glob');

nopt.invalidHandler = function(key, val) {
    throw new Error(key + " was invalid with value \"" + val + "\"");
};

nopt.typeDefs.brace_style = {
    type: "brace_style",
    validate: function(data, key, val) {
        data[key] = val;
        // TODO: expand-strict is obsolete, now identical to expand.  Remove in future version
        // TODO: collapse-preserve-inline is obselete, now identical to collapse,preserve-inline = true. Remove in future version
        var validVals = ["collapse", "collapse-preserve-inline", "expand", "end-expand", "expand-strict", "none", "preserve-inline"];
        var valSplit = val.split(/[^a-zA-Z0-9_\-]+/); //Split will always return at least one parameter
        for (var i = 0; i < valSplit.length; i++) {
            if (validVals.indexOf(valSplit[i]) === -1) {
                return false;
            }
        }

-------------------------------------

  Written by Daniel Stockman (daniel.stockman@gmail.com)

*/

var debug = process.env.DEBUG_JSBEAUTIFY || process.env.JSBEAUTIFY_DEBUG ? function() {
    console.error.apply(console, arguments);
} : function() {};

var fs = require('fs'),
    cc = require('config-chain'),
    beautify = require('../index'),
    mkdirp = require('mkdirp'),
    nopt = require('nopt');
nopt.invalidHandler = function(key, val, types) {
    throw new Error(key + " was invalid with value \"" + val + "\"");
}
nopt.typeDefs.brace_style = {
    type: "brace_style",
    validate: function(data, key, val) {
        data[key] = val;
        // TODO: expand-strict is obsolete, now identical to expand.  Remove in future version
        // TODO: collapse-preserve-inline is obselete, now identical to collapse,preserve-inline = true. Remove in future version
        var validVals = ["collapse", "collapse-preserve-inline", "expand", "end-expand", "expand-strict", "none", "preserve-inline"];
        var valSplit = val.split(/[^a-zA-Z0-9_\-]+/); //Split will always return at least one parameter
        for (var i = 0; i < valSplit.length; i++) {
            if (validVals.indexOf(valSplit[i]) === -1) {
                return false;
            }
        }
        return true;

// development only
if (process.env.NODE_ENV === 'development') {
  app.use(errorhandler());
}


var knownOpts = {
    "settings":[path],
    "v": Boolean,
    "help": Boolean
};
var shortHands = {
    "s":["--settings"],
    "?":["--help"]
};
nopt.invalidHandler = function(k,v,t) {
    console.log(k,v,t);
}

var parsedArgs = nopt(knownOpts,shortHands,process.argv,2)

if (parsedArgs.help) {
    console.log("Marquette");
    console.log("Usage: node marquette.js [-v] [-?] [--settings settings.js]");
    console.log("");
    console.log("Options:");
    console.log("  -s, --settings FILE  use specified settings file");
    console.log("  -v                   enable verbose output");
    console.log("  -?, --help           show usage");
    process.exit();
}

}

function validateStream (data, k, val) {
  if (!(val instanceof Stream)) return false
  data[k] = val
}

nopt.typeDefs.semver = { type: semver, validate: validateSemver }
nopt.typeDefs.Octal = { type: Octal, validate: validateOctal }
nopt.typeDefs.Stream = { type: Stream, validate: validateStream }

// Don't let --tag=1.2.3 ever be a thing
var tag = {}
nopt.typeDefs.tag = { type: tag, validate: validateTag }

nopt.invalidHandler = function (k, val, type) {
  log.warn("invalid config", k + "=" + JSON.stringify(val))

  if (Array.isArray(type)) {
    if (type.indexOf(url) !== -1) type = url
    else if (type.indexOf(path) !== -1) type = path
  }

  switch (type) {
    case tag:
      log.warn("invalid config", "Tag must not be a SemVer range")
      break
    case Octal:
      log.warn("invalid config", "Must be octal number, starting with 0")
      break
    case url:
      log.warn("invalid config", "Must be a full url with 'http://'")

}

function validateStream (data, k, val) {
  if (!(val instanceof Stream)) return false
  data[k] = val
}

nopt.typeDefs.semver = { type: semver, validate: validateSemver }
nopt.typeDefs.Octal = { type: Octal, validate: validateOctal }
nopt.typeDefs.Stream = { type: Stream, validate: validateStream }

// Don't let --tag=1.2.3 ever be a thing
var tag = {}
nopt.typeDefs.tag = { type: tag, validate: validateTag }

nopt.invalidHandler = function (k, val, type) {
  log.warn("invalid config", k + "=" + JSON.stringify(val))

  if (Array.isArray(type)) {
    if (type.indexOf(url) !== -1) type = url
    else if (type.indexOf(path) !== -1) type = path
  }

  switch (type) {
    case tag:
      log.warn("invalid config", "Tag must not be a SemVer range")
      break
    case Octal:
      log.warn("invalid config", "Must be octal number, starting with 0")
      break
    case url:
      log.warn("invalid config", "Must be a full url with 'http://'")

function validateSemver (data, k, val) {
  if (!semver.valid(val)) return false
  data[k] = semver.valid(val)
}

function validateStream (data, k, val) {
  if (!(val instanceof Stream)) return false
  data[k] = val
}

nopt.typeDefs.semver = { type: semver, validate: validateSemver }
nopt.typeDefs.Octal = { type: Octal, validate: validateOctal }
nopt.typeDefs.Stream = { type: Stream, validate: validateStream }

nopt.invalidHandler = function (k, val, type, data) {
  log.warn("invalid config", k + "=" + JSON.stringify(val))

  if (Array.isArray(type)) {
    if (type.indexOf(url) !== -1) type = url
    else if (type.indexOf(path) !== -1) type = path
  }

  switch (type) {
    case Octal:
      log.warn("invalid config", "Must be octal number, starting with 0")
      break
    case url:
      log.warn("invalid config", "Must be a full url with 'http://'")
      break
    case path:
      log.warn("invalid config", "Must be a valid filesystem path")

function validateSemver (data, k, val) {
  if (!semver.valid(val)) return false
  data[k] = semver.valid(val)
}

function validateStream (data, k, val) {
  if (!(val instanceof Stream)) return false
  data[k] = val
}

nopt.typeDefs.semver = { type: semver, validate: validateSemver }
nopt.typeDefs.Stream = { type: Stream, validate: validateStream }
nopt.typeDefs.Umask = { type: Umask, validate: validateUmask }

nopt.invalidHandler = function (k, val, type) {
  log.warn("invalid config", k + "=" + JSON.stringify(val))

  if (Array.isArray(type)) {
    if (type.indexOf(url) !== -1) type = url
    else if (type.indexOf(path) !== -1) type = path
  }

  switch (type) {
    case Umask:
      log.warn("invalid config", "Must be umask, octal number in range 0000..0777")
      break
    case url:
      log.warn("invalid config", "Must be a full url with 'http://'")
      break
    case path:
      log.warn("invalid config", "Must be a valid filesystem path")

var path = require("path")
  , stdio = process.binding("stdio")
  , url = require("url")
  , Stream = require("stream").Stream
  , semver = require("semver")
  , stableFamily = semver.parse(process.version)
  , os = require("os")
  , nopt = require("nopt")
  , log = require("./log")

nopt.typeDefs.semver = { type: semver, validate: validateSemver }
function validateSemver (data, k, val) {
  if (!semver.valid(val)) return false
  data[k] = semver.valid(val)
}
nopt.invalidHandler = function (k, val, type, data) {
  log.warn(k + "=" + JSON.stringify(val), "invalid config")
}

if (!stableFamily || (+stableFamily[2] % 2)) stableFamily = null
else stableFamily = stableFamily[1] + "." + stableFamily[2]

var defaults
Object.defineProperty(exports, "defaults", {get: function () {
  if (defaults) return defaults
  return defaults =
    { argv : []
    , "always-auth" : false
    , bindist : stableFamily
        && ( stableFamily + "-"
           + "ares" + process.versions.ares + "-"
           + "ev" + process.versions.ev + "-"

function validateSemver (data, k, val) {
  if (!semver.valid(val)) return false
  data[k] = semver.valid(val)
}

function validateStream (data, k, val) {
  if (!(val instanceof Stream)) return false
  data[k] = val
}

nopt.typeDefs.semver = { type: semver, validate: validateSemver }
nopt.typeDefs.Octal = { type: Octal, validate: validateOctal }
nopt.typeDefs.Stream = { type: Stream, validate: validateStream }

nopt.invalidHandler = function (k, val, type, data) {
  log.warn("invalid config", k + "=" + JSON.stringify(val))

  if (Array.isArray(type)) {
    if (type.indexOf(url) !== -1) type = url
    else if (type.indexOf(path) !== -1) type = path
  }

  switch (type) {
    case Octal:
      log.warn("invalid config", "Must be octal number, starting with 0")
      break
    case url:
      log.warn("invalid config", "Must be a full url with 'http://'")
      break
    case path:
      log.warn("invalid config", "Must be a valid filesystem path")

function validateSemver (data, k, val) {
  if (!semver.valid(val)) return false
  data[k] = semver.valid(val)
}

function validateStream (data, k, val) {
  if (!(val instanceof Stream)) return false
  data[k] = val
}

nopt.typeDefs.semver = { type: semver, validate: validateSemver }
nopt.typeDefs.Octal = { type: Octal, validate: validateOctal }
nopt.typeDefs.Stream = { type: Stream, validate: validateStream }

nopt.invalidHandler = function (k, val, type, data) {
  log.warn("invalid config", k + "=" + JSON.stringify(val))

  if (Array.isArray(type)) {
    if (type.indexOf(url) !== -1) type = url
    else if (type.indexOf(path) !== -1) type = path
  }

  switch (type) {
    case Octal:
      log.warn("invalid config", "Must be octal number, starting with 0")
      break
    case url:
      log.warn("invalid config", "Must be a full url with 'http://'")
      break
    case path:
      log.warn("invalid config", "Must be a valid filesystem path")