fix(cli): template created during import should be written to assets folder

packages/@aws-cdk-testing/cli-integ/resources/cdk-apps/app/app.js

@@ -142,6 +142,15 @@ class MigrateStack extends cdk.Stack {
         value: queue.node.defaultChild.logicalId,
       });
     }
+
+    if (process.env.LARGE_TEMPLATE) {
+      for (let i = 0; i < 70; i++) {
+        const q = new sqs.Queue(this, `cdk-import-queue-test${i}`, {
+          enforceSSL: true,
+        });
+      }
+    }
+
     if (process.env.SAMPLE_RESOURCES) {
       const myTopic = new sns.Topic(this, 'migratetopic1', {
         removalPolicy: cdk.RemovalPolicy.DESTROY,

packages/@aws-cdk-testing/cli-integ/tests/cli-integ-tests/cli.integtest.ts

@@ -1431,7 +1431,7 @@ integTest('test resource import', withDefaultFixture(async (fixture) => {
 
   // Initial deploy
   await fixture.cdkDeploy('importable-stack', {
-    modEnv: { ORPHAN_TOPIC: '1' },
+    modEnv: { ORPHAN_TOPIC: '1', LARGE_TEMPLATE: '1' },
     options: ['--outputs-file', outputsFile],
   });
 
@@ -1442,7 +1442,7 @@ integTest('test resource import', withDefaultFixture(async (fixture) => {
   try {
     // Deploy again, orphaning the queue
     await fixture.cdkDeploy('importable-stack', {
-      modEnv: { OMIT_TOPIC: '1' },
+      modEnv: { OMIT_TOPIC: '1', LARGE_TEMPLATE: '1' },
     });
 
     // Write a resource mapping file based on the ID from step one, then run an import

packages/aws-cdk/lib/api/util/template-body-parameter.ts

@@ -1,3 +1,4 @@
+import * as path from 'path';
 import * as cxapi from '@aws-cdk/cx-api';
 import * as chalk from 'chalk';
 import * as fs from 'fs-extra';
@@ -68,7 +69,8 @@ export async function makeBodyParameter(
   if (overrideTemplate) {
     // Add a variant of this template
     templateFile = `${stack.templateFile}-${templateHash}.yaml`;
-    await fs.writeFile(templateFile, templateJson, { encoding: 'utf-8' });
+    const templateFilePath = path.join(stack.assembly.directory, templateFile);
+    await fs.writeFile(templateFilePath, templateJson, { encoding: 'utf-8' });
   }
 
   assetManifest.addFileAsset(templateHash, {