cdk synth fails to resolve symlinks when staging assets as of 1.16.0

❓ General Issue

The Question

After upgrading from 1.15.0 to 1.16.1, cdk synth command fails with:

Error: ENOENT: no such file or directory, symlink '../fast-xml-parser/cli.js' -> 'cdk.out/asset.046889af674a59f8c3e80adeeadca2bd0a4922e131160a62c280be1c0d15a097/node_modules/.bin/xml2js'

fast-xml-parser is a dependency I have under lib/resources/package.json used by a lambda function.

Any idea where those symlinks come from or what creates them? And how to clean them / regenerate them.

Also running cdk synth and then cdk diff again seems to remove the issue and diff says No differences. But I have same issue running jest for the tests for the lambda (same missing symlink warning). If I revert back to 1.15.0, both work.

Environment

• CDK CLI Version: 1.16.1 (build 9a5a761)
• OS: Ubuntu
• Language: TypeScript

Other information

Error: ENOENT: no such file or directory, symlink '../fast-xml-parser/cli.js' -> 'cdk.out/asset.046889af674a59f8c3e80adeeadca2bd0a4922e131160a62c280be1c0d15a097/node_modules/.bin/xml2js'
    at Object.symlinkSync (fs.js:909:3)
    at Object.copyDirectory (/home/vertti/dev/kesko/k-ruoka-product-service/importers/ttp-importer/node_modules/@aws-cdk/assets/lib/fs/copy.ts:25:14)
    at Staging.synthesize (/home/vertti/dev/kesko/k-ruoka-product-service/importers/ttp-importer/node_modules/@aws-cdk/assets/lib/staging.ts:87:7)
    at Function.synth (/home/vertti/dev/kesko/k-ruoka-product-service/importers/ttp-importer/node_modules/@aws-cdk/core/lib/construct.ts:56:28)
    at App.synth (/home/vertti/dev/kesko/k-ruoka-product-service/importers/ttp-importer/node_modules/@aws-cdk/core/lib/app.ts:142:36)
    at process.App.process.once (/home/vertti/dev/kesko/k-ruoka-product-service/importers/ttp-importer/node_modules/@aws-cdk/core/lib/app.ts:121:45)
    at Object.onceWrapper (events.js:286:20)
    at process.emit (events.js:198:13)
    at process.EventEmitter.emit (domain.js:448:20)
    at process.emit (/home/vertti/dev/kesko/k-ruoka-product-service/importers/ttp-importer/node_modules/source-map-support/source-map-support.js:485:21)

[hanstf]

same problem here but after installing the lambda dependencies with npm install --no-bin-links then deployment works.

[jd-carroll]

In case anyone else sees this, just add the following to your package.json

  "resolutions": {
    "@aws-cdk/assets": "1.15.0",
    "@aws-cdk/core": "^1.16.0",
    "@aws-cdk/cx-api": "^1.16.0"
  }

If you have a mono-repo, place it in the root