fix(build): fix ssr environment emitAssets: true when sharedConfigBuild: true

packages/vite/src/node/__tests__/build.spec.ts

@@ -865,6 +865,73 @@ test.for([true, false])(
   },
 )
 
+test('sharedConfigBuild and emitAssets', async () => {
+  const root = resolve(__dirname, 'fixtures/shared-config-build/emitAssets')
+  const builder = await createBuilder({
+    root,
+    logLevel: 'warn',
+    configFile: false,
+    environments: {
+      client: {
+        build: {
+          outDir: './dist/client',
+          emitAssets: true,
+          rollupOptions: {
+            input: '/entry.js',
+          },
+        },
+      },
+      ssr: {
+        build: {
+          outDir: './dist/ssr',
+          emitAssets: true,
+          rollupOptions: {
+            input: '/entry.js',
+          },
+        },
+      },
+      custom: {
+        build: {
+          outDir: './dist/custom',
+          emitAssets: true,
+          rollupOptions: {
+            input: '/entry.js',
+          },
+        },
+      },
+    },
+    builder: {
+      sharedConfigBuild: true,
+    },
+  })
+
+  expect(
+    ['client', 'ssr', 'custom'].map(
+      (name) => builder.environments[name].config.build.emitAssets,
+    ),
+  ).toEqual([true, true, true])
+
+  await builder.buildApp()
+
+  expect(
+    await Promise.all(
+      ['client', 'ssr', 'custom'].map((name) =>
+        fsp.readdir(
+          resolve(
+            root,
+            builder.environments[name].config.build.outDir,
+            'assets',
+          ),
+        ),
+      ),
+    ),
+  ).toEqual([
+    expect.arrayContaining([expect.stringMatching(/\.css$/)]),
+    expect.arrayContaining([expect.stringMatching(/\.css$/)]),
+    expect.arrayContaining([expect.stringMatching(/\.css$/)]),
+  ])
+})
+
 test('adjust worker build error for worker.format', async () => {
   try {
     await build({

packages/vite/src/node/__tests__/fixtures/shared-config-build/emitAssets/entry.js

@@ -0,0 +1,2 @@
+import './test.css'
+console.log('entry')

packages/vite/src/node/__tests__/fixtures/shared-config-build/emitAssets/test.css

@@ -0,0 +1,3 @@
+body {
+  color: orange;
+}

packages/vite/src/node/config.ts

@@ -1659,7 +1659,7 @@ export async function resolveConfig(
   // For backward compat, set ssr environment build.emitAssets with the same value as build.ssrEmitAssets that might be changed in configResolved hook
   // https://github.com/vikejs/vike/blob/953614cea7b418fcc0309b5c918491889fdec90a/vike/node/plugin/plugins/buildConfig.ts#L67
   if (resolved.environments.ssr) {
-    resolved.environments.ssr.build.emitAssets =
+    resolved.environments.ssr.build.emitAssets ||=
       resolved.build.ssrEmitAssets || resolved.build.emitAssets
   }