Fix import.meta.env also without trailing dot (#3675)

Co-authored-by: Matthew Phillips <matthew@skypack.dev>

.changeset/tidy-peaches-sit.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix `import.meta.env` also without trailing dot

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

@@ -231,9 +231,9 @@ ${tsResult}`;
 	};
 }
 
-// Converts the first dot in `import.meta.env.` to its Unicode escape sequence,
+// Converts the first dot in `import.meta.env` to its Unicode escape sequence,
 // which prevents Vite from replacing strings like `import.meta.env.SITE`
 // in our JS representation of loaded Markdown files
 function escapeViteEnvReferences(code: string) {
-	return code.replace(/import\.meta\.env\./g, 'import\\u002Emeta.env.');
+	return code.replace(/import\.meta\.env/g, 'import\\u002Emeta.env');
 }

packages/astro/test/astro-markdown.test.js

@@ -277,14 +277,20 @@ describe('Astro Markdown', () => {
 		// test 1: referencing an existing var name
 		expect($('code').eq(0).text()).to.equal('import.meta.env.SITE');
 		expect($('li').eq(0).text()).to.equal('import.meta.env.SITE');
-		expect($('code').eq(2).text()).to.contain('site: import.meta.env.SITE');
+		expect($('code').eq(3).text()).to.contain('site: import.meta.env.SITE');
 		expect($('blockquote').text()).to.contain('import.meta.env.SITE');
 
 		// test 2: referencing a non-existing var name
 		expect($('code').eq(1).text()).to.equal('import.meta.env.TITLE');
 		expect($('li').eq(1).text()).to.equal('import.meta.env.TITLE');
-		expect($('code').eq(2).text()).to.contain('title: import.meta.env.TITLE');
+		expect($('code').eq(3).text()).to.contain('title: import.meta.env.TITLE');
 		expect($('blockquote').text()).to.contain('import.meta.env.TITLE');
+
+		// test 3: referencing `import.meta.env` itself (without any var name)
+		expect($('code').eq(2).text()).to.equal('import.meta.env');
+		expect($('li').eq(2).text()).to.equal('import.meta.env');
+		expect($('code').eq(3).text()).to.contain('// Use Vite env vars with import.meta.env');
+		expect($('blockquote').text()).to.match(/import\.meta\.env\s*$/);
 	});
 
 	it('Escapes HTML tags in code blocks', async () => {

packages/astro/test/fixtures/astro-markdown/src/pages/vite-env-vars.md

@@ -1,5 +1,5 @@
 ---
-title: Referencing Vite Env Vars like import.meta.env.SITE and import.meta.env.TITLE
+title: Referencing Vite Env Vars like import.meta.env.SITE, import.meta.env.TITLE and import.meta.env
 layout: ../layouts/content.astro
 ---
 
@@ -9,9 +9,12 @@ You can get the configured site URL with `import.meta.env.SITE`.
 
 The variable `import.meta.env.TITLE` is not configured.
 
+You can reference all env vars through `import.meta.env`.
+
 This should also work outside of code blocks:
 - import.meta.env.SITE
 - import.meta.env.TITLE
+- import.meta.env
 
 ## Usage in fenced code blocks with syntax highlighting
 
@@ -20,6 +23,7 @@ This should also work outside of code blocks:
 import rss from '@astrojs/rss';
 
 export const get = () => rss({
+	// Use Vite env vars with import.meta.env
 	site: import.meta.env.SITE,
 	title: import.meta.env.TITLE,
 	items: import.meta.glob('./**/*.md'),