Support PUBLIC_ environment variables (#1750)

* Support PUBLIC_ environment variables

* Remove unnecessary Test component

packages/astro/src/core/create-vite.ts

@@ -55,6 +55,7 @@ export async function createVite(inlineConfig: ViteConfigWithSSR, { astroConfig,
     ],
     publicDir: fileURLToPath(astroConfig.public),
     root: fileURLToPath(astroConfig.projectRoot),
+    envPrefix: 'PUBLIC_',
     server: {
       force: true, // force dependency rebuild (TODO: enabled only while next is unstable; eventually only call in "production" mode?)
       hmr: process.env.NODE_ENV === 'test' || process.env.NODE_ENV === 'production' ? false : undefined, // disable HMR for test

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

@@ -0,0 +1,23 @@
+import { expect } from 'chai';
+import { loadFixture } from './test-utils.js';
+
+describe('Environment Variables', () => {
+  let fixture;
+
+  before(async () => {
+    fixture = await loadFixture({ projectRoot: './fixtures/astro-envs/' });
+
+    await fixture.build();
+  });
+
+  it('builds without throwing', async () => {
+    expect(true).to.equal(true);
+  });
+
+  it('does render public env, does not render private env', async () => {
+    let indexHtml = await fixture.readFile('/index.html');
+
+    expect(indexHtml).to.not.include('CLUB_33');
+    expect(indexHtml).to.include('BLUE_BAYOU');
+  });
+});

packages/astro/test/fixtures/astro-envs/.env

@@ -0,0 +1,2 @@
+SECRET_PLACE=CLUB_33
+PUBLIC_PLACE=BLUE_BAYOU

packages/astro/test/fixtures/astro-envs/.gitignore

@@ -0,0 +1 @@
+!.env

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

@@ -0,0 +1,2 @@
+<environment-variable>{import.meta.env.PUBLIC_PLACE}</environment-variable>
+<environment-variable>{import.meta.env.SECRET_PLACE}</environment-variable>