fix(vite): skip server bundle for static presets

src/build/vite/prod.ts

@@ -104,7 +104,14 @@ export async function buildEnvironments(ctx: NitroPluginContext, builder: ViteBu
   await prerender(nitro);
 
   // Build the Nitro server bundle
-  const output = (await builder.build(builder.environments.nitro)) as RolldownOutput;
+  let output: RolldownOutput | undefined;
+  if (nitro.options.static) {
+    // Static presets have no server entry. Vite's `buildApp()` builds every
+    // environment when none were built, so mark this one as handled.
+    builder.environments.nitro.isBuilt = true;
+  } else {
+    output = (await builder.build(builder.environments.nitro)) as RolldownOutput;
+  }
 
   // Close the Nitro instance
   await nitro.close();

test/vite/static-preset-fixture/nitro.config.ts

@@ -0,0 +1,6 @@
+import { defineConfig } from "nitro";
+
+export default defineConfig({
+  preset: "static",
+  prerender: { routes: ["/"] },
+});

test/vite/static-preset-fixture/server.ts

@@ -0,0 +1,7 @@
+export default {
+  fetch(_req: Request) {
+    return new Response("<h1>prerendered</h1>", {
+      headers: { "content-type": "text/html" },
+    });
+  },
+};

test/vite/static-preset-fixture/vite.config.ts

@@ -0,0 +1,6 @@
+import { defineConfig } from "vite";
+import { nitro } from "nitro/vite";
+
+export default defineConfig({
+  plugins: [nitro()],
+});

test/vite/static-preset.test.ts

@@ -0,0 +1,33 @@
+import { fileURLToPath } from "node:url";
+import { join } from "node:path";
+import { readFile, readdir, rm, mkdir } from "node:fs/promises";
+import { describe, expect, it } from "vitest";
+import { createNitro, build, prepare } from "nitro/builder";
+
+const fixtureDir = fileURLToPath(new URL("./static-preset-fixture", import.meta.url));
+const tmpDir = fileURLToPath(new URL("./static-preset-fixture/.tmp", import.meta.url));
+
+describe("static preset", () => {
+  const outDir = join(tmpDir, "vite");
+
+  it("build", async () => {
+    await rm(outDir, { recursive: true, force: true });
+    await mkdir(outDir, { recursive: true });
+    const nitro = await createNitro({
+      rootDir: fixtureDir,
+      output: { dir: outDir },
+      builder: "vite",
+    });
+    await prepare(nitro);
+    await build(nitro);
+  });
+
+  it("does not emit a server bundle", async () => {
+    expect((await readdir(outDir)).sort()).toEqual(["nitro.json", "public"]);
+  });
+
+  it("prerenders routes to the public dir", async () => {
+    const html = await readFile(join(outDir, "public/index.html"), "utf8");
+    expect(html).toContain("<h1>prerendered</h1>");
+  });
+});