Плагин

Шаблон

"use strict";
const through = require("through2");
const PluginError = require("plugin-error");

const PLUGIN_NAME = "name";

/**
 * @param {Object} [options]
 *
 *
 */
const gulpSourceToHTML = (pluginOptions = {}) => {
   return through.obj((file, _, callback) => {
      if (file.isNull()) {
         return callback(null, file);
      }

      if (file.isStream()) {
         return callback(new PluginError(PLUGIN_NAME, "Streaming not supported"));
      }

      const defaultOptions = { rootpath: file.base, extensions: [".jpg", ".png", ".jpeg", ".JPG", ".PNG", ".JPEG"] };
      const options = { ...defaultOptions, ...pluginOptions };
      (async () => {
         try {
            
            
            file.contents = Buffer.from(newData);
            callback(null, file);
         } catch (err) {
            callback(new PluginError(PLUGIN_NAME, err));
         }
      })();
   });
};

module.exports = gulpSourceToHTML;

Дополнительные материалы

https://www.youtube.com/watch?v=mcxcZBl728w&t=4s