Process JS files with gulp

gulpfile.js/tasks/js.js

@@ -0,0 +1,86 @@
+#!/usr/bin/env node
+
+"use strict";
+
+const { src, dest, watch, series, parallel} = require('gulp');
+
+const concat = require('gulp-concat');
+const rename = require("gulp-rename");
+const uglify = require('gulp-uglify');
+
+const JS_ROOT = './assets/js';
+const jsDest = `${ JS_ROOT }/dist/`;
+
+function concatJs(files, output) {
+  return src(files)
+    .pipe(concat(output))
+    .pipe(rename({ extname: '.min.js' }))
+    .pipe(dest(jsDest));
+}
+
+function minifyJs() {
+  return src(`${ jsDest }/*.js`)
+    .pipe(uglify())
+    .pipe(dest(jsDest));
+}
+
+const homeJs = () => {
+  return concatJs([
+      `${JS_ROOT}/_commons/*.js`,
+      `${JS_ROOT}/_utils/timeago.js`
+    ],
+    'home'
+  );
+};
+
+const postJs = () => {
+  return concatJs([
+      `${JS_ROOT}/_commons/*.js`,
+      `${JS_ROOT}/_utils/timeago.js`,
+      `${JS_ROOT}/_utils/img-hyperlink.js`,
+      `${JS_ROOT}/_utils/lang-badge.js`,
+      // 'smooth-scroll.js' must be called after ToC is ready
+      `${JS_ROOT}/_utils/smooth-scroll.js`
+    ], 'post'
+  );
+};
+
+const categoriesJs = () => {
+  return concatJs([
+      `${JS_ROOT}/_commons/*.js`,
+      `${JS_ROOT}/_utils/category-collapse.js`
+    ], 'categories'
+  );
+};
+
+const pageJs = () => {
+  return concatJs([
+      `${JS_ROOT}/_commons/*.js`,
+      `${JS_ROOT}/_utils/smooth-scroll.js`
+    ], 'page'
+  );
+};
+
+// GA pageviews report
+const pvreportJs = () => {
+  return concatJs([
+      `${JS_ROOT}/_utils/pageviews.js`
+    ], 'pvreport'
+  );
+};
+
+const buildJs = parallel(homeJs, postJs, categoriesJs, pageJs, pvreportJs);
+
+exports.build = series(buildJs, minifyJs);
+
+exports.liveRebuild = () => {
+  buildJs();
+
+  watch([
+      `${ JS_ROOT }/_commons/*.js`,
+      `${ JS_ROOT }/_utils/*.js`
+    ],
+    buildJs
+  )
+}
+