Made polyfill route more flexible

out/polyfill-worker.js

@@ -5,14 +5,14 @@ const worker_1 = require("threads/worker");
 const fs = require("fs");
 const polyfill_analyzer_1 = require("@10xjs/polyfill-analyzer");
 const polyfills_1 = require("@10xjs/polyfill-analyzer/dist/polyfills");
-worker_1.expose(() => {
+worker_1.expose((fileToWatch) => {
     const exclude = [
         "console.markTimeline",
         "console.timeline",
         "console.timelineEnd",
     ];
     const featureList = polyfill_analyzer_1.analyze({
-        source: fs.readFileSync('./public/js/bundle.js', 'utf-8'),
+        source: fs.readFileSync(fileToWatch, 'utf-8'),
         include: polyfills_1.default.filter(x => !exclude.includes(x)),
         // Not all features listed by polyfillLibrary.listAllPolyfills()` can be detected.
         unsupportedPolyfill: 'ignore',

out/polyfill.d.ts

@@ -12,7 +12,7 @@ export declare type PolyfillOptions = {
     uaString: string;
     rum: boolean;
 };
-declare function getRouter(opts?: Partial<PolyfillOptions>): RequestHandler;
+declare function getRouter(fileToWatch: string, opts?: Partial<PolyfillOptions>): RequestHandler;
 export declare const Polyfill: {
     getRouter: typeof getRouter;
 };

out/polyfill.js

@@ -14,19 +14,19 @@ const polyfillLibrary = require("polyfill-library");
 const _1 = require(".");
 const threads_1 = require("threads");
 const features = new _1.WaitForSync();
-(() => __awaiter(void 0, void 0, void 0, function* () {
+function getRouter(fileToWatch, opts) {
+    (() => __awaiter(this, void 0, void 0, function* () {
         const worker = yield threads_1.spawn(new threads_1.Worker("./polyfill-worker"));
-    const feats = yield worker();
+        const feats = yield worker(fileToWatch);
         yield threads_1.Thread.terminate(worker);
         return feats;
-}))()
+    }))()
         .then(feats => {
         feats["fetch"] = {};
         _1.Logger.debug("Polyfill analysed:", Object.keys(feats));
         features.setData(feats);
-})
+    })
         .catch(err => features.setError(err));
-function getRouter(opts) {
     const options = Object.assign({ minify: _1.DefaultConfig.isProduction, unknown: "polyfill" }, opts);
     return (req, res) => __awaiter(this, void 0, void 0, function* () {
         const polyfillBundle = yield polyfillLibrary.getPolyfillString(Object.assign(Object.assign({}, options), { uaString: req.header("user-agent"), features: yield features.resolve(), stream: false }));

src/polyfill-worker.ts

@@ -5,14 +5,14 @@ import {analyze} from '@10xjs/polyfill-analyzer';
 import allPolyfills from '@10xjs/polyfill-analyzer/dist/polyfills';
 import {PolyfillFeatureList} from 'polyfill-library';
 
-expose(() => {
+expose((fileToWatch) => {
 	const exclude = [
 		"console.markTimeline",
 		"console.timeline",
 		"console.timelineEnd",
 	];
 	const featureList = analyze({
-		source: fs.readFileSync('./public/js/bundle.js', 'utf-8'),
+		source: fs.readFileSync(fileToWatch, 'utf-8'),
 		include: allPolyfills.filter(x => !exclude.includes(x)),
 		// Not all features listed by polyfillLibrary.listAllPolyfills()` can be detected.
 		unsupportedPolyfill: 'ignore',

src/polyfill.ts

@@ -19,14 +19,14 @@ export type PolyfillOptions = {
 	rum: boolean,
 }
 
-const features = new WaitForSync<PolyfillFeatureList>();
-
-(async () => {
+function getRouter(fileToWatch: string, opts?: Partial<PolyfillOptions>): RequestHandler {
+	const features = new WaitForSync<PolyfillFeatureList>();
+	(async () => {
 		const worker = await spawn<WorkerFunction>(new Worker("./polyfill-worker"));
-	const feats = await worker() as PolyfillFeatureList;
+		const feats = await worker(fileToWatch) as PolyfillFeatureList;
 		await Thread.terminate(worker);
 		return feats;
-})()
+	})()
 		.then(feats => {
 			feats["fetch"] = {};
 			Logger.debug("Polyfill analysed:", Object.keys(feats));
@@ -34,8 +34,6 @@ const features = new WaitForSync<PolyfillFeatureList>();
 		})
 		.catch(err => features.setError(err));
 
-
-function getRouter(opts?: Partial<PolyfillOptions>): RequestHandler {
 	const options: Partial<PolyfillOptions> = {
 		minify: DefaultConfig.isProduction,
 		unknown: "polyfill",