fix: Ensure typegen CLI command doesn't hang due to open handles

Author: ericmatthys

packages/next/src/bin/next.ts

@@ -395,8 +395,10 @@ program
     )}`
   )
   .action((directory: string, options: NextTypegenOptions) =>
+    // ensure process exits after typegen completes so open handles/connections
+    // don't cause process to hang
     import('../cli/next-typegen.js').then((mod) =>
-      mod.nextTypegen(options, directory)
+      mod.nextTypegen(options, directory).then(() => process.exit(0))
     )
   )
   .usage('[directory] [options]')

test/e2e/app-dir/typed-routes/next.config.js

@@ -1,3 +1,6 @@
+// intervals/open connections shouldn't block typegen from exiting
+setInterval(() => {}, 250)
+
 /**
  * @type {import('next').NextConfig}
  */

test/e2e/app-dir/typed-routes/typed-routes.test.ts

@@ -1,4 +1,5 @@
 import { nextTestSetup } from 'e2e-utils'
+import { runNextCommand } from 'next-test-utils'
 
 const expectedDts = `
 type AppRoutes = "/" | "/_shop/[[...category]]" | "/dashboard" | "/dashboard/settings" | "/docs/[...slug]" | "/gallery/photo/[id]" | "/project/[slug]"
@@ -90,4 +91,12 @@ type InvalidRoute = RouteContext<'/api/users/invalid'>`
       )
     })
   }
+
+  it('should exit typegen successfully', async () => {
+    const { code } = await runNextCommand(['typegen'], {
+      cwd: next.testDir,
+    })
+
+    expect(code).toBe(0)
+  })
 })