fix: completely virtual file system

src/esbuild_plugins/resolve_svelte_internal.ts

@@ -1,40 +1,24 @@
-import {
-	basename,
-	dirname,
-	fromFileUrl,
-} from "https://deno.land/[email protected]/path/mod.ts";
 import type { Plugin } from "https://deno.land/x/[email protected]/mod.js";
 
-const file = fromFileUrl(import.meta.url);
-const file_name = basename(file);
-const dir_name = dirname(file);
-
 const svelte_internal = await fetch(
 	"https://esm.sh/v108/[email protected]/es2020/internal.js",
 );
 const svelte_internal_src = await svelte_internal.text();
 
+const filter = /^svelte\/internal$/;
+
 export const resolve_svelte_internal: Plugin = {
 	name: "svelte/internal",
 	setup(build) {
-		build.onResolve({ filter: /^svelte\/internal$/ }, async () => {
-			// this doesn't actually do anything, we just need to resolve a real
-			// module. the actual replacement happens in the onLoad hook below
-			const result = await build.resolve(
-				// this file name is used in the `onLoad` filter below
-				file_name,
-				{
-					resolveDir: dir_name,
-					kind: "import-rule",
-				},
-			);
-			if (result.errors.length > 0) {
-				return { errors: result.errors };
-			}
-			return { path: result.path, external: false };
+		build.onResolve({ filter }, () => {
+			return {
+				path: "svelte/internal",
+				namespace: "fs-virtual",
+				external: false,
+			};
 		});
 
-		build.onLoad({ filter: new RegExp(file_name) }, () => {
+		build.onLoad({ filter }, () => {
 			return {
 				contents: svelte_internal_src,
 			};