Add public envs

README.md

@@ -742,6 +742,9 @@ const config: BunextConfig = {
     globalVars: {
         MY_API_URL: "https://api.example.com",
     },
+    public_envs: {
+        BUNEXT_PUBLIC_APP_NAME: "My App",
+    },
     development: false, // forced by the CLI; set manually if needed
 };
 
@@ -755,6 +758,7 @@ export default config;
 | `distDir`            | `string`                                                                          | `.bunext`        | Internal artifact directory                                                                       |
 | `assetsPrefix`       | `string`                                                                          | `_bunext/static` | URL prefix for static assets                                                                      |
 | `globalVars`         | `{ [k: string]: any }`                                                            | —                | Variables injected globally at build time                                                         |
+| `public_envs`        | `Record<string, string>`                                                          | —                | Public env vars exposed to the client via `window.process.env` (see [Environment Variables](#environment-variables)) |
 | `development`        | `boolean`                                                                         | —                | Overridden to `true` by `bunext dev` automatically                                                |
 | `defaultCacheExpiry` | `number`                                                                          | `3600`           | Global page cache expiry in seconds                                                               |
 | `middleware`         | `(params: BunextConfigMiddlewareParams) => Response \| undefined \| Promise<...>` | —                | Global middleware — see [Middleware](#middleware)                                                 |
@@ -909,9 +913,35 @@ bun run server.ts
 
 ## Environment Variables
 
-| Variable | Description                                             |
-| -------- | ------------------------------------------------------- |
-| `PORT`   | Override the server port (takes precedence over config) |
+| Variable           | Description                                                                                      |
+| ------------------ | ------------------------------------------------------------------------------------------------ |
+| `PORT`             | Override the server port (takes precedence over config)                                          |
+| `BUNEXT_PUBLIC_*`  | Any env var prefixed with `BUNEXT_PUBLIC_` is exposed to the client via `window.process.env`     |
+
+### Public Environment Variables
+
+Variables prefixed with `BUNEXT_PUBLIC_` are automatically injected into every page as `window.process.env`. You can also define public envs in config via `public_envs` (config values override env vars of the same name):
+
+```bash
+# .env
+BUNEXT_PUBLIC_API_URL=https://api.example.com
+```
+
+```ts
+// bunext.config.ts
+const config: BunextConfig = {
+    public_envs: {
+        BUNEXT_PUBLIC_APP_NAME: "My App",
+    },
+};
+```
+
+```tsx
+// Client component — available after hydration
+const apiUrl = window.process.env.BUNEXT_PUBLIC_API_URL;
+```
+
+`window.process.env` always includes `NODE_ENV` (`"development"` or `"production"`).
 
 ---
 

dist/functions/server/web-pages/generate-web-html.js

@@ -43,11 +43,13 @@ export default async function genWebHTML({ component: Main, pageProps, bundledMa
     const RootHead = root_module?.Head;
     const dev = isDevelopment();
     const final_meta = _.merge(root_meta, page_meta);
-    // const public_envs = Object.keys(process.env).filter((e) =>
-    //     e.startsWith(`NEXT_PUBLIC_`),
-    // );
+    const public_envs = Object.fromEntries(Object.entries(process.env).filter(([k]) => k.startsWith("BUNEXT_PUBLIC_")));
     const client_process = {
-        env: {},
+        env: {
+            NODE_ENV: dev ? "development" : "production",
+            ...public_envs,
+            ...global.CONFIG.public_envs,
+        },
     };
     let final_component = (_jsxs("html", { ...html_props, children: [_jsxs("head", { children: [_jsx("meta", { charSet: "utf-8", "data-bunext-head": true }), _jsx("meta", { name: "viewport", content: "width=device-width, initial-scale=1.0", "data-bunext-head": true }), final_meta ? grabWebMetaHTML({ meta: final_meta }) : null, bundledMap?.css_path ? (_jsx("link", { rel: "stylesheet", href: `/${bundledMap.css_path}`, "data-bunext-head": true })) : null, _jsx("script", { dangerouslySetInnerHTML: {
                             __html: `window.${ClientWindowPagePropsName} = ${serializedProps};\nwindow.process = ${JSON.stringify(client_process)}`,

dist/types/index.d.ts

@@ -72,6 +72,10 @@ export type BunextConfig = {
      * absolute), or a RegEx pattern.
      */
     exclude_watch_patterns?: (string | RegExp)[];
+    /**
+     * Public environment variables to be passed to the client
+     */
+    public_envs?: Record<string, string>;
 };
 export type BunextConfigMiddlewareParams = {
     req: Request;

package.json

@@ -1,6 +1,6 @@
 {
     "name": "@moduletrace/bunext",
-    "version": "1.0.103",
+    "version": "1.0.104",
     "main": "dist/index.js",
     "module": "index.ts",
     "dependencies": {

src/functions/server/web-pages/generate-web-html.tsx

@@ -70,12 +70,18 @@ export default async function genWebHTML({
 
     const final_meta = _.merge(root_meta, page_meta);
 
-    // const public_envs = Object.keys(process.env).filter((e) =>
-    //     e.startsWith(`NEXT_PUBLIC_`),
-    // );
+    const public_envs = Object.fromEntries(
+        Object.entries(process.env).filter(([k]) =>
+            k.startsWith("BUNEXT_PUBLIC_"),
+        ),
+    );
 
     const client_process = {
-        env: {},
+        env: {
+            NODE_ENV: dev ? "development" : "production",
+            ...public_envs,
+            ...global.CONFIG.public_envs,
+        },
     };
 
     let final_component = (

src/types/index.ts

@@ -89,6 +89,10 @@ export type BunextConfig = {
      * absolute), or a RegEx pattern.
      */
     exclude_watch_patterns?: (string | RegExp)[];
+    /**
+     * Public environment variables to be passed to the client
+     */
+    public_envs?: Record<string, string>;
 };
 
 export type BunextConfigMiddlewareParams = {