Add support for bundles with only a default entry point.

Changes in `@yowasp/runtime` had made it possible to have bundles with
a single common entry point (wohoo!!), but before this commit, these
would fail to import. Fix this before releasing any such bundles.

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 All notable changes to the YoWASP toolchain extension will be documented in this file.
 
+## 0.2.4
+
+- Updated the internal interface to the YoWASP runtime.
+
 ## 0.2.3
 
 - Switched to an automated publishing workflow. All releases starting from this one are published from the continuous integration environment.

src/extension.ts

@@ -214,7 +214,8 @@ function workerEntryPoint(self: WorkerContext) {
             Exit: CommandExitConstructor
         };
         try {
-            const entryPointURL = new URL(packageJSON["exports"]["browser"], url);
+            const entryPoint = packageJSON.exports.browser ?? packageJSON.exports.default;
+            const entryPointURL = new URL(entryPoint, url);
             console.log(`[YoWASP toolchain] Importing bundle entry point from ${entryPointURL}`);
             bundleNS = await self.importModule(entryPointURL);
         } catch (e) {

src/workerThread.ts

@@ -84,6 +84,7 @@ if (USE_WEB_WORKERS) {
                 //
                 // Almost all of this can be deleted when VS Code ships Node v18.19.0 or later.
                 const globalThis: any = {
+                    fetch: fetch,
                     importScripts: function() {
                         // Needs to be `TypeError` for Pyodide loader to switch to `await import`.
                         throw new TypeError(`importScripts() not implemented`);
@@ -120,7 +121,6 @@ if (USE_WEB_WORKERS) {
                         TextEncoder,
                         URL,
                         Blob,
-                        fetch,
                         console,
                         performance,
                         crypto,