aws-cdk: Assets: Zip archive is corrupted for Lambda code

Reproduction Steps

I have a regular Lambda stack that looks something like:

const lambdaDeleteDDBFn = new Function(this, 'LambdaToDeleteDDB', {
    runtime: Runtime.NODEJS_10_X,
    handler: 'delete-ddb-table-lambda.handle',
    // The path should be relative to the root directory.
    code: Code.asset('./lib/lambda'),
    timeout: Duration.seconds(300),
    environment: {
        REGION: this.region,
        TABLE_NAME: tableName
    }
});

The ./lib/lambda directory looks normal as well which includes already compiled JS files:

$ ll lib/lambda/
total 64
-rw-r--r--  1 user  1896053708  5324  3 Jan 09:17 create-invalid-stack-lambda.js
-rw-r--r--  1 user  1896053708  4719  3 Jan 09:17 custom-resource-utils.js
-rw-r--r--  1 user  1896053708  3501  3 Jan 09:17 delete-ddb-table-lambda.js
-rw-r--r--  1 user  1896053708  1148  2 Jan 15:25 custom-resource-utils.ts
-rw-r--r--  1 user  1896053708   870  2 Jan 15:18 delete-ddb-table-lambda.ts
-rw-r--r--  1 user  1896053708  1401  2 Jan 14:10 create-invalid-stack-lambda.ts

Once CDK app is build, it generates cdk.out with bunch of template JSON files as well as the asset.XXX directory that is a copy of the ./lib/lambda directory.

$ ll build/cdk.out/asset.12efd52ab96c4083197e09d00af8f35f6f4f02b951217130bede554ac178685b
total 64
-rw-r--r--  1 user  1896053708  5324  3 Jan 09:18 create-invalid-stack-lambda.js
-rw-r--r--  1 user  1896053708  1401  3 Jan 09:18 create-invalid-stack-lambda.ts
-rw-r--r--  1 user  1896053708  4719  3 Jan 09:18 custom-resource-utils.js
-rw-r--r--  1 user  1896053708  1148  3 Jan 09:18 custom-resource-utils.ts
-rw-r--r--  1 user  1896053708  3501  3 Jan 09:18 delete-ddb-table-lambda.js
-rw-r--r--  1 user  1896053708   870  3 Jan 09:18 delete-ddb-table-lambda.ts

We can confirm that bytes sizes of files match the original files.

Error Log

Then this directory gets zipped by CDK by the zipDirectory() function which, however, generates a corrupted ZIP file. I think the underlying archiver NPM module has a bug somewhere.

$ unzip -t build/cdk.out/asset.12efd52ab96c4083197e09d00af8f35f6f4f02b951217130bede554ac178685b.zip
Archive:  build/cdk.out/asset.12efd52ab96c4083197e09d00af8f35f6f4f02b951217130bede554ac178685b.zip
    testing: create-invalid-stack-lambda.js   bad CRC 28acfbde  (should be 6bd7e1c9)
file #2:  bad zipfile offset (local header sig):  2731
file #3:  bad zipfile offset (local header sig):  5009
file #4:  bad zipfile offset (local header sig):  5771
    testing: delete-ddb-table-lambda.js   OK
    testing: delete-ddb-table-lambda.ts   OK
At least one error was detected in build/cdk.out/asset.12efd52ab96c4083197e09d00af8f35f6f4f02b951217130bede554ac178685b.zip.

When I try to force unzip locally, the following error is displayed:

Unable to expand "asset.12efd52ab96c4083197e09d00af8f35f6f4f02b951217130bede554ac178685b.zip` into "cdk.out".

The deployment to the actual stack also fails with the following error:

Could not unzip uploaded file. Please check your file, then try to upload again. (Service: AWSLambdaInternal; Status Code: 400; Error Code: InvalidParameterValueException; Request ID: 853d7206-2f80-422e-a7ff-01c15b960ed9)

When I check the file size, I see the following:

$ ll build/cdk.out/
-rw-r--r--  1 user  1896053708    10218  3 Jan 09:53 asset.12efd52ab96c4083197e09d00af8f35f6f4f02b951217130bede554ac178685b - CORRECT.zip
-rw-r--r--@ 1 user  1896053708     9280  3 Jan 09:18 asset.12efd52ab96c4083197e09d00af8f35f6f4f02b951217130bede554ac178685b.zip

Note that the file size of the correct zip which I manually generated is 10KB while the actual one generated by CDK is 9KB.

Environment

• CLI Version : 1.17.1
• Framework Version: 1.17.1
• OS : macOS Mojave
• Language : TypeScript