Error in next export when serverActions is enabled

packages/next/src/cli/next-export.ts

@@ -65,6 +65,7 @@ const nextExport: CliCommand = (argv) => {
     outdir: args['--outdir'] ? resolve(args['--outdir']) : join(dir, 'out'),
     isInvokedFromCli: true,
     hasAppDir: false,
+    buildExport: false,
   }
 
   exportApp(dir, options, nextExportCliSpan)

packages/next/src/export/index.ts

@@ -197,6 +197,15 @@ export default async function exportApp(
       )
     }
 
+    // Running next export or using output: 'export' in next.config.js
+    if (!options.buildExport || nextConfig.output === 'export') {
+      if (nextConfig.experimental.serverActions) {
+        throw new ExportError(
+          `Server Actions are not supported with static export.`
+        )
+      }
+    }
+
     const telemetry = options.buildExport ? null : new Telemetry({ distDir })
 
     if (telemetry) {

packages/next/src/lib/metadata/resolve-metadata.test.ts

@@ -126,7 +126,6 @@ describe('accumulateMetadata', () => {
         [{ themeColor: '#fff' }, null],
       ]
       const metadata = await accumulateMetadata(metadataItems)
-      console.log('xxmetadata', metadata.themeColor)
       expect(metadata).toMatchObject({
         themeColor: [{ color: '#fff' }],
       })

test/e2e/app-dir/actions/app-action-export.test.ts

@@ -0,0 +1,40 @@
+import { createNextDescribe } from 'e2e-utils'
+
+createNextDescribe(
+  'app-dir action handling - next export',
+  {
+    files: __dirname,
+    skipStart: true,
+    skipDeployment: true,
+  },
+  ({ next, isNextStart }) => {
+    if (!isNextStart) {
+      it('skip test for dev mode', () => {})
+      return
+    }
+
+    beforeAll(async () => {
+      await next.stop()
+      await next.patchFile(
+        'next.config.js',
+        `
+      module.exports = {
+        output: 'export',
+        experimental: {
+          serverActions: true,
+        },
+      }
+      `
+      )
+      try {
+        await next.start()
+      } catch {}
+    })
+
+    it('should error when use export output for server actions', async () => {
+      expect(next.cliOutput).toContain(
+        `Server Actions are not supported with static export.`
+      )
+    })
+  }
+)

test/lib/next-modes/next-dev.ts

@@ -3,7 +3,7 @@ import { Span } from 'next/src/trace'
 import { NextInstance } from './base'
 
 export class NextDevInstance extends NextInstance {
-  private _cliOutput: string
+  private _cliOutput: string = ''
 
   public get buildId() {
     return 'development'

test/lib/next-modes/next-start.ts

@@ -6,7 +6,7 @@ import { Span } from 'next/src/trace'
 
 export class NextStartInstance extends NextInstance {
   private _buildId: string
-  private _cliOutput: string
+  private _cliOutput: string = ''
   private spawnOpts: SpawnOptions
 
   public get buildId() {
@@ -37,9 +37,6 @@ export class NextStartInstance extends NextInstance {
   }
 
   public async start() {
-    if (this.childProcess) {
-      throw new Error('next already started')
-    }
     this._cliOutput = ''
     this.spawnOpts = {
       cwd: this.testDir,
@@ -53,6 +50,10 @@ export class NextStartInstance extends NextInstance {
         __NEXT_TEST_MODE: 'e2e',
       },
     }
+
+    if (this.childProcess) {
+      throw new Error('next already started')
+    }
     let buildArgs = ['yarn', 'next', 'build']
     let startArgs = ['yarn', 'next', 'start']