fix: middleware entry point to not be set (#8036)

* fix: middleware entry point to not be set

* chore: update tests

3 files changed, 22 insertions, 8 deletions

diff --git a/.changeset/rotten-flowers-know.md b/.changeset/rotten-flowers-know.md
new file mode 100644
index 000000000..03ab03feb
--- /dev/null
+++ b/.changeset/rotten-flowers-know.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix a bug where the middleware entry point was passed to integrations even though the configuration `build.excludeMiddleware` was set to `false`.
diff --git a/packages/astro/src/core/build/plugins/plugin-middleware.ts b/packages/astro/src/core/build/plugins/plugin-middleware.ts
index 8afca2fbc..5ed532d5e 100644
--- a/packages/astro/src/core/build/plugins/plugin-middleware.ts
+++ b/packages/astro/src/core/build/plugins/plugin-middleware.ts
@@ -56,7 +56,7 @@ export function vitePluginMiddleware(
 				if (chunk.type === 'asset') {
 					continue;
 				}
-				if (chunk.fileName === 'middleware.mjs') {
+				if (chunk.fileName === 'middleware.mjs' && opts.settings.config.build.excludeMiddleware) {
 					internals.middlewareEntryPoint = new URL(chunkName, opts.settings.config.build.server);
 				}
 			}
diff --git a/packages/astro/test/middleware.test.js b/packages/astro/test/middleware.test.js
index 1ed857d5b..3796a341f 100644
--- a/packages/astro/test/middleware.test.js
+++ b/packages/astro/test/middleware.test.js
@@ -118,13 +118,7 @@ describe('Middleware API in PROD mode, SSR', () => {
 		fixture = await loadFixture({
 			root: './fixtures/middleware-dev/',
 			output: 'server',
-			adapter: testAdapter({
-				setEntryPoints(entryPointsOrMiddleware) {
-					if (entryPointsOrMiddleware instanceof URL) {
-						middlewarePath = entryPointsOrMiddleware;
-					}
-				},
-			}),
+			adapter: testAdapter({}),
 		});
 		await fixture.build();
 	});
@@ -218,6 +212,21 @@ describe('Middleware API in PROD mode, SSR', () => {
 	});
 
 	it('the integration should receive the path to the middleware', async () => {
+		fixture = await loadFixture({
+			root: './fixtures/middleware-dev/',
+			output: 'server',
+			build: {
+				excludeMiddleware: true,
+			},
+			adapter: testAdapter({
+				setEntryPoints(entryPointsOrMiddleware) {
+					if (entryPointsOrMiddleware instanceof URL) {
+						middlewarePath = entryPointsOrMiddleware;
+					}
+				},
+			}),
+		});
+		await fixture.build();
 		expect(middlewarePath).to.not.be.undefined;
 		try {
 			const path = fileURLToPath(middlewarePath);