gulpfile.js

const _ = require("lodash");
const merge = require("merge-stream");
const gulp = require("gulp");

/**
 * Copy required asset files to app/assets/** folder
 */
gulp.task("assets", () => {
    const modules_dirname = "node_modules",
        config = {
            app: { vue: "*", flatpickr: "*", lodash: { files: "lodash*.js", dest: "/dist" } },
            "app/system/modules/editor/app": { tinymce: "*", marked: "*", codemirror: "*" },
        };

    return merge.apply(
        null,
        _.map(config, (assets, module) => {
            let files,
                assets_dirname = module + "/assets";
            return _.map(assets, (cfg, asset) => {
                let source = modules_dirname + "/" + asset,
                    dest = assets_dirname + "/" + asset;
                files = typeof cfg === "object" && cfg.files ? source + "/" + cfg.files : source + "/" + "**";
                dest = typeof cfg === "object" && cfg.dest ? dest + cfg.dest : dest;
                return gulp.src([files]).pipe(gulp.dest(dest));
            });
        })
    );
});

gulp.task("uikit", () => {
    return gulp.src("./node_modules/uikit/dist/**/*").pipe(gulp.dest("./app/assets/uikit/dist/"));
});

gulp.task("default", gulp.parallel("assets", "uikit"));