cmd/cue: cmd exec.Run runner of kind "XXX" not found with k8s resources

[cueckoo]

Originally opened by @b4nst in cuelang/cue#1061

What version of CUE are you using (cue version)?

$ cue version
cue version v0.4.0 darwin/amd64

Does this issue reproduce with the latest release?

yes

What did you do?

I'm still trying to cut down my module in order to send something short that reproduces my issue.

command: deploy: {
	apply: exec.Run & {
		r:                  release.#Release
		stdin: r.output
		cmd:   "cat"
	}
}

r.output being a string generated by a yaml.MarshalStream of a list in release.#Release. This list contains Kubernetes definitions.

I've noticed that if I use yaml.Marshal(single-resource) it works. It does not work with a list comprehension + strings.Join (same error)
The command works if I replace exec.Run by cli.Print with proper changes (stdin --> text, remove cmd)

What did you expect to see?

Command executed with sucess (prints r.output content)

What did you see instead?

Prints r.output content then exit with error

runner of kind "XXX" not found

XXX being the kind value of the first resource displayed (e.g. Deployment)

[myitcv]

Apologies for the delay in getting back to you, @b4nst we were busy with the migration (#1078)!

We're going to need a bit more to go on here. Have you had any luck reproducing this?

If you have a large repro that's fine. If it's private, happy to reduce and discuss offline.

[b4nst]

I can't remember exactly what was the issue, but it seems I fixed it. I remember that for some reason, adding a nested level in the command for task seemed to work better (command: deploy: task: apply instead of command: deploy: apply).

I think we can close this one since I ended up achieving my goals by cleaning my code. I strongly suspect PEBAK on this one. I can reopen it if I achieve to reproduce it. Thanks for your answer, and don't worry for the delay!

[myitcv]

Thanks for the quick follow up, @b4nst!

[astraios]

Hey, I'm afraid I'm facing the same issue in a very similar context.

I'm attaching a small public repo with a reproducible example: https://github.com/astraios/cuelangfoo

Each time you run cue build, it will fail because of:

cue build
runner of kind "ServiceAccount" not found

[eonpatapon]

@astraios In your example you are passing a k8s resource, not an actual cue task

The thing is cue determines something is a task by looking a some particular attribute $id, but also for historic reasons kind. Since your k8s resource has a kind field it thinks it is a task and tries to run go code associated with it. Obviously this code doesn't exists.

https://github.com/cuelang/cue/blob/master/cmd/cue/cmd/custom.go#L168

[astraios]

OIC, thanks for that insight. I had a look at that file yesterday, but the fact that I was trying to turn my "Release" structure into an actual cue "task" completely escaped me. With the following approach it works!!!

command: build: {
	// Write manifests
	task: writeManifest: file.Create & {
		filename: "manifests.yaml"
		contents: yaml.Marshal(foo.Release.manifests.default.ServiceAccount."test-sa")
	}
}

My original idea was to have a "variable" I could work with in tasks. I guess my approach is not a correct one...
Thanks for the help!!!