fix: inline htmlrewriter wasm blob to workaround bundling problems

Author: pieh

edge-runtime/lib/response.ts

@@ -1,7 +1,6 @@
 import type { Context } from '@netlify/edge-functions'
 import {
   HTMLRewriter,
-  init,
   type TextChunk,
 } from '../vendor/deno.land/x/htmlrewriter@v1.0.0/src/index.ts'
 
@@ -17,8 +16,6 @@ import {
   relativizeURL,
 } from './util.ts'
 
-await init()
-
 export interface FetchEventResult {
   response: Response
   waitUntil: Promise<any>

src/build/functions/edge.ts

@@ -85,13 +85,27 @@ const writeHandlerFile = async (ctx: PluginContext, { matchers, name }: NextDefi
     JSON.stringify(minimalNextConfig),
   )
 
+  const htmlRewriterWasm = await readFile(
+    join(
+      ctx.pluginDir,
+      'edge-runtime/vendor/deno.land/x/htmlrewriter@v1.0.0/pkg/htmlrewriter_bg.wasm',
+    ),
+  )
+
   // Writing the function entry file. It wraps the middleware code with the
   // compatibility layer mentioned above.
   await writeFile(
     join(handlerDirectory, `${handlerName}.js`),
     `
+    import { decode as _base64Decode } from './edge-runtime/vendor/deno.land/std@0.175.0/encoding/base64.ts';
+    import { init as htmlRewriterInit } from './edge-runtime/vendor/deno.land/x/htmlrewriter@v1.0.0/src/index.ts'
     import {handleMiddleware} from './edge-runtime/middleware.ts';
     import handler from './server/${name}.js';
+
+    await htmlRewriterInit({ module_or_path: _base64Decode(${JSON.stringify(
+      htmlRewriterWasm.toString('base64'),
+    )}).buffer });
+
     export default (req, context) => handleMiddleware(req, context, handler);
     `,
   )