gulp-html-vnu-validator/index.js

Validate HTML with vnu.jar locally

'use strict';
/**
 * Created by g.yanev on 03.02.2017.
 */

const vnu = require('vnu-jar');
const gutil = require("gulp-util");
const PluginError = gutil.PluginError;
const through = require("through2");
const path = require("path");
const sh = require("shelljs");

const PLUGIN_NAME = "gulp-html-vnu-validator";

function colorizeType(type) {
  switch (type) {
    case "info" :
      return gutil.colors.blue(type);
      break;
    default:
      return gutil.colors.red(type);
  }
}

function validate(config) {
  var options = config || {};

  return through.obj(function (file, encoding, callback) {
    if (file.isNull()) {
      return callback(null, file);
    }

    if (file.isBuffer()) {
      var stackSize = options.stackSize || "-Xss1m";
      try {
        var output = JSON.parse(sh.exec("java " + stackSize + " -jar \"" + vnu + "\" --format json \"" + file.path + "\"", {silent: true}).stderr);
      } catch (Exception) {
        gutil.log(gutil.colors.red("The JSON couldn't be parsed. Please try to increase the stackSize option."));
        return false;
      }
      if (output.messages.length > 0) {
        gutil.log(gutil.colors.red("[HTML5 Validator - Problem(s) in"), file.path, "]");

        var errors = output.messages;

        for (var error in errors) {
          var err_info = errors[error];
          gutil.log(colorizeType(err_info.type), err_info.message, "Line: " + err_info.lastLine);
        }
      } else {
        gutil.log(gutil.colors.green("[HTML5 Validator - No problems]"), file.path);
      }

      if (options.newLines) {
        console.log("\n");
      }

    }

    if (file.isStream()) {
      throw new PluginError(PLUGIN_NAME, "Streams are not yet supported");
    }

    callback(null, file);
  });


}

module.exports = validate;