provide import.meta.env.SITE when there are private envs (#3498)

* provide import.meta.env.SITE when there are private envs

* Adds a changeset

* Handle destructing of import.meta.env.SITE

.changeset/nice-cougars-hear.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes use of import.meta.env.SITE

packages/astro/src/vite-plugin-env/index.ts

@@ -78,6 +78,7 @@ export default function envVitePlugin({
 			if (typeof privateEnv === 'undefined') {
 				privateEnv = getPrivateEnv(config, astroConfig);
 				if (privateEnv) {
+					privateEnv.SITE = astroConfig.site ? `'${astroConfig.site}'` : 'undefined';
 					const entries = Object.entries(privateEnv).map(([key, value]) => [
 						`import.meta.env.${key}`,
 						value,

packages/astro/test/astro-envs.test.js

@@ -35,6 +35,12 @@ describe('Environment Variables', () => {
 		expect(indexHtml).to.include('http://example.com');
 	});
 
+	it('does render destructured builtin SITE env', async () => {
+		let indexHtml = await fixture.readFile('/destructured/index.html');
+
+		expect(indexHtml).to.include('http://example.com');
+	});
+
 	it('includes public env in client-side JS', async () => {
 		let dirs = await fixture.readdir('/');
 		let found = false;

packages/astro/test/fixtures/astro-envs/src/pages/destructured.astro

@@ -1,5 +1,6 @@
 ---
-const { PUBLIC_PLACE, SECRET_PLACE } = import.meta.env;
+const { PUBLIC_PLACE, SECRET_PLACE, SITE } = import.meta.env;
 ---
 <environment-variable>{PUBLIC_PLACE}</environment-variable>
 <environment-variable>{SECRET_PLACE}</environment-variable>
+<environment-variable>{SITE}</environment-variable>