Included browserify

Signed-off-by: Jim Martens <github@2martens.de>

gulpfile.js

@@ -4,10 +4,14 @@
 const autoprefixer = require("autoprefixer");
 const babel = require("gulp-babel");
 const browserSync = require("browser-sync").create();
+const babelify = require("babelify");
+const browserify = require("browserify");
+const buffer = require("vinyl-buffer");
 const cleancss = require("gulp-clean-css");
 const concat = require("gulp-concat");
 const del = require("del");
 const exec = require("child_process").exec;
+const globby = require("globby");
 const gulp = require("gulp");
 const gutil = require("gulp-util");
 const imagemin = require("gulp-imagemin");
@@ -17,7 +21,9 @@ const rename = require("gulp-rename");
 const run = require("gulp-run");
 const sass = require("gulp-ruby-sass");
 const sourcemaps = require("gulp-sourcemaps");
+const source = require("vinyl-source-stream");
 const terser = require("gulp-terser");
+const through = require("through2");
 
 // Include paths file.
 const paths = require("./_assets/gulp_config/paths");
@@ -67,23 +73,39 @@ gulp.task("clean:styles", function () {
 // Concatenates and uglifies global JS files and outputs result to the
 // appropriate location.
 gulp.task("build:scripts:global", function () {
-    return gulp.src(depfiles.concat([
+    let bundledStream = through();
+    const files = depfiles.concat([
         //paths.jsFiles + "/global/lib" + paths.jsPattern,
         paths.jsFiles + "/global/*.js",
         paths.jsFiles + "/main.js"
-    ])).pipe(sourcemaps.init({largeFile: true}))
-        .pipe(babel({
-            presets: ["@babel/env"]
-        }))
-        .pipe(concat("main.js"))
-        .pipe(terser({
-            keep_fnames: true,
-            mangle: false
-        }))
-        .pipe(sourcemaps.write())
+    ]);
+    bundledStream
+        .pipe(source("main.js"))
+        .pipe(buffer())
+        .pipe(sourcemaps.init({largeFile: true, loadMaps: true}))
+        //.pipe(concat("main.js"))
+        //.pipe(terser())
+        .pipe(sourcemaps.write("."))
         .pipe(gulp.dest(paths.jekyllJsFiles))
         .pipe(gulp.dest(paths.siteJsFiles))
         .on("error", gutil.log);
+
+    globby(files).then(function(entries) {
+        // create the Browserify instance.
+        let b = browserify({
+            entries: entries,
+            debug: true,
+        }).transform(babelify, {presets: ["@babel/preset-env"]});
+
+        // pipe the Browserify stream into the stream we created earlier
+        // this starts our gulp pipeline.
+        b.bundle().pipe(bundledStream);
+    }).catch(function(err) {
+        // ensure any errors from globby are handled
+        bundledStream.emit("error", err);
+    });
+
+    return bundledStream;
 });
 
 gulp.task("clean:scripts", function () {