fix(asset-staging): ignored platform property on bundling an asset wi…

…th docker

Fixes #30239

The bundling-properties value was not copied from the AssetBundling properties
to the image.run properties so the --platform option for docker run was never
added.

This patch copies the platform property for AssetBundlingBindMount and
AssetBundlingVolumeCopy.

This fix makes the 'platform' property work as described in
https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.BundlingOptions.html#platform

    - [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

packages/aws-cdk-lib/core/lib/private/asset-staging.ts

@@ -52,6 +52,7 @@ export class AssetBundlingBindMount extends AssetBundlingBase {
   public run() {
     this.options.image.run({
       command: this.options.command,
+      platform: this.options.platform,
       user: this.determineUser(),
       environment: this.options.environment,
       entrypoint: this.options.entrypoint,
@@ -178,6 +179,7 @@ export class AssetBundlingVolumeCopy extends AssetBundlingBase {
 
     this.options.image.run({
       command: this.options.command,
+      platform: this.options.platform,
       user: user,
       environment: this.options.environment,
       entrypoint: this.options.entrypoint,

packages/aws-cdk-lib/core/test/private/asset-staging.test.ts

@@ -113,4 +113,33 @@ describe('bundling', () => {
       'public.ecr.aws/docker/library/alpine',
     ]), { encoding: 'utf-8', stdio: ['ignore', process.stderr, 'inherit'] })).toEqual(true);
   });
+
+  test('AssetBundlingBindMount bundles with given platform', () => {
+    // GIVEN
+    sinon.stub(process, 'platform').value('darwin');
+    const spawnSyncStub = sinon.stub(child_process, 'spawnSync').returns({
+      status: 0,
+      stderr: Buffer.from('stderr'),
+      stdout: Buffer.from('stdout'),
+      pid: 123,
+      output: ['stdout', 'stderr'],
+      signal: null,
+    });
+    const options = {
+      sourcePath: '/tmp/source',
+      bundleDir: '/tmp/output',
+      image: DockerImage.fromRegistry('public.ecr.aws/docker/library/alpine'),
+      user: '1000',
+      platform: 'linux/arm64',
+    };
+    const helper = new AssetBundlingBindMount(options);
+    helper.run();
+
+    // actual docker run with bind mount is called
+    expect(spawnSyncStub.calledWith(DOCKER_CMD, sinon.match.array.contains([
+      'run', '--rm',
+      '--platform', 'linux/arm64',
+      'public.ecr.aws/docker/library/alpine',
+    ]), { encoding: 'utf-8', stdio: ['ignore', process.stderr, 'inherit'] })).toEqual(true);
+  });
 });