Windows fixes

plugins/sass.ts

@@ -1,6 +1,6 @@
 import { merge, normalizePath, replaceExtension } from "../core/utils.ts";
 import Sass from "../deps/sass.ts";
-import { posix, toFileUrl } from "../deps/path.ts";
+import { posix, toFileUrl, fromFileUrl } from "../deps/path.ts";
 import { Page } from "../core/filesystem.ts";
 import { prepareAsset, saveAsset } from "./source_maps.ts";
 import textLoader from "../core/loaders/text.ts";
@@ -57,7 +57,7 @@ export default function (userOptions?: Partial<Options>) {
         url: toFileUrl(filename),
         importer: {
           canonicalize(url: string) {
-            let pathname = new URL(url).pathname;
+            let pathname = normalizePath(fromFileUrl(url));
 
             if (pathname.startsWith(basePath)) {
               pathname = normalizePath(pathname.slice(basePath.length));
@@ -79,10 +79,10 @@ export default function (userOptions?: Partial<Options>) {
               }
             }
 
-            throw new Error(`File not be canonicalized: ${url} (${pathname})`);
+            throw new Error(`File cannot be canonicalized: ${url} (${pathname})`);
           },
           async load(url: URL) {
-            let pathname = url.pathname;
+            let pathname = normalizePath(fromFileUrl(url));
 
             if (pathname.startsWith(basePath)) {
               pathname = normalizePath(pathname.slice(basePath.length));