From 0b8410bd58dfb6fddbb3105d50a0c85041ee8c0f Mon Sep 17 00:00:00 2001
From: Nick K <nick.kruchinin@gmail.com>
Date: Tue, 21 May 2024 21:04:04 +0300
Subject: [PATCH] fix(bun): Support application builds with Bun (#6344)

---
 packages/qwik/src/optimizer/src/platform.ts       | 10 +++++-----
 starters/adapters/bun/adapters/bun/vite.config.ts |  5 +++++
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/packages/qwik/src/optimizer/src/platform.ts b/packages/qwik/src/optimizer/src/platform.ts
index e21e7bbdf7c..deea07dedb4 100644
--- a/packages/qwik/src/optimizer/src/platform.ts
+++ b/packages/qwik/src/optimizer/src/platform.ts
@@ -35,7 +35,7 @@ export async function getSystem() {
   }
 
   if (globalThis.IS_CJS) {
-    if (sysEnv === 'node') {
+    if (sysEnv === 'node' || sysEnv === 'bun') {
       // using this api object as a way to ensure bundlers
       // do not try to inline or rewrite require()
       sys.dynamicImport = (path) => require(path);
@@ -62,7 +62,7 @@ export async function getSystem() {
     }
   }
 
-  if (sysEnv === 'node') {
+  if (sysEnv === 'node' || sysEnv === 'bun') {
     sys.path = await sys.dynamicImport('node:path');
     sys.cwd = () => process.cwd();
     sys.os = process.platform;
@@ -135,7 +135,7 @@ export async function loadPlatformBinding(sys: OptimizerSystem) {
   const sysEnv = getEnv();
 
   // Try native build
-  if (sysEnv === 'node') {
+  if (sysEnv === 'node' || sysEnv === 'bun') {
     // Node.js
     const platform = (QWIK_BINDING_MAP as any)[process.platform];
     if (platform) {
@@ -164,7 +164,7 @@ export async function loadPlatformBinding(sys: OptimizerSystem) {
   if (globalThis.IS_CJS) {
     // CJS WASM
 
-    if (sysEnv === 'node') {
+    if (sysEnv === 'node' || sysEnv === 'bun') {
       // CJS WASM Node.js
       const wasmPath = sys.path.join(__dirname, 'bindings', 'qwik_wasm_bg.wasm');
       const mod = await sys.dynamicImport(`./bindings/qwik.wasm.cjs`);
@@ -225,7 +225,7 @@ export async function loadPlatformBinding(sys: OptimizerSystem) {
   }
 
   if (globalThis.IS_ESM) {
-    if (sysEnv === 'node') {
+    if (sysEnv === 'node' || sysEnv === 'bun') {
       // CJS WASM Node.js
       const url: typeof import('url') = await sys.dynamicImport('node:url');
       const __dirname = sys.path.dirname(url.fileURLToPath(import.meta.url));
diff --git a/starters/adapters/bun/adapters/bun/vite.config.ts b/starters/adapters/bun/adapters/bun/vite.config.ts
index 4ba9c1d2452..7f4eb2f44fa 100644
--- a/starters/adapters/bun/adapters/bun/vite.config.ts
+++ b/starters/adapters/bun/adapters/bun/vite.config.ts
@@ -1,7 +1,11 @@
 import { bunServerAdapter } from "@builder.io/qwik-city/adapters/bun-server/vite";
 import { extendConfig } from "@builder.io/qwik-city/vite";
+import { _TextEncoderStream_polyfill } from "@builder.io/qwik-city/middleware/request-handler";
 import baseConfig from "../../vite.config";
 
+// This polyfill is required when you use SSG and build your app with Bun, because Bun does not have TextEncoderStream. See: https://github.com/oven-sh/bun/issues/5648
+globalThis.TextEncoderStream ||= _TextEncoderStream_polyfill;
+
 export default extendConfig(baseConfig, () => {
   return {
     build: {
@@ -16,6 +20,7 @@ export default extendConfig(baseConfig, () => {
         ssg: {
           include: ["/*"],
           origin: "https://yoursite.dev",
+          maxWorkers: 1, // Limit Workers to 1, otherwise SSG will hang when compiling Qwik City app with `bun run --bun build`.
         },
       }),
     ],