Are there any configuration libraries like <#C018G...

# serialization

[dave08]

Are there any configuration libraries like #hoplite based on KotlinX Serialization? They all seem to use reflection... and using KotlinX Serialization by itself won't parse environment variables or system properties, nor will it merge configurations from a few sources...

[christophsturm]

You can just merge via the hocon lib. We used a 3 line config loader that merged multiple configs and just used Kotlinx and the hocon lib

[christophsturm]

I don’t have the source because I no longer work on that project

[christophsturm]

Typesafe config + kotlinx ser

[christophsturm]

https://github.com/lightbend/config#merging-config-trees

[zt]

Ktoml might be what you're looking for. It's toml only but uses kotlinx serialization

[christophsturm]

Just to be clear, I mean https://search.maven.org/artifact/org.jetbrains.kotlinx/kotlinx-serialization-hocon together with typesafe config. It’s really only 3 lines to get merging, and end vars also work

[dave08]

ktoml just seems to be another format supported... hocon too. I guess I'll either have to settle for #hoplite or implement merging myself. I thought someone might have already done this... thanks anyways!

[christophsturm]

What config file format do you want to
Use?

[dave08]

yaml + env vars to override its values in certain cases (I'm using docker images in kubernetes -- and sometimes config values need to be overridden by env vars to avoid recompiling everything and redeploying a new image for settings changes. Also, I have common settings that need to be merged with local/dev/production setting.

[christophsturm]

oh ok i was somehow assuming that you want .conf files. with .conf files it would work perfectly. If i was going to build something new I would probably use cue files.

[dave08]

I use cue for kubernetes manifests, but how would that help in overriding already compiled settings that are in the deployed docker image?

[christophsturm]

how do you use cue for kubernetes manifests? sorry i was just talking hypothetically that I currently use conf files but what i really want to use for everthing is cue. but that config lib does not exist yet, there also seems to be no cue support for kotlinx-ser-

[dave08]

There's a tutorial of k8s somewhere in the cue project's github

[dave08]

It makes thing VERY concise

[christophsturm]

I always use gitops with flux and I think there is no gitops operator yet that can do cue.

[christophsturm]

but I have spent hours tracking down errors caused by yaml whitespace errors.

[dave08]

ArgoCD can be adapted to cue

[dave08]

Which is what I'm doibng

[dave08]

And intellij has a half-decent cue plugin

[dave08]

- name: cue
  generate:
    command: ["sh", "-c"]
    args: ["cue cmd dump ."]

in configManagementPlugins in the configMap

[dave08]

Adds a plugin for cue

[dave08]

The dump is from cue's k8s tutorial

[christophsturm]

oh nice. I wanted to try argocd anyway. (but flux seems to be much lighweighter and the people on my last project were already using it)

[christophsturm]

anyway it would be cool to use just one config file format.

[sam]

Out of interest why do you not want to use hoplite here @dave08. Is there some issue with it ?