`cdk8s synth --stdout` doesn't produce valid yaml output

Description of the bug:

When running cdk8s synth --stdout the output isn’t valid yaml. This is because the first line output is a file name. This makes it unnecessarily difficult to perform further parsing of the output, such as yaml-loading it to split it up into separate files etc.

I would expect the --stdout flag to produce valid yaml

Reproduction Steps:

run cdk8s synth --stdout

Error Log:

Environment:

• Framework Version:
• OS:

Other:

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This is 🐛 Bug Report

[mrliptontea]

I’d like to make a suggestion - assuming file names in the output are important and intentional, can they not be preceded with # to make a YAML comment? E.g.:

# /tmp/cdk8s-JnaTCh/app.k8s.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
…

I am a bit surprised this isn’t being addressed or discussed - I’d thought that cdk8s synth | kubectl apply -f - would be something that a lot of people would use, especially those coming from kustomize which only recently updated its embedded version so previously had to use kustomize build | kubectl apply -f -.

[github-actions[bot]]

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