I don't think so no, it needs to match case or you...

# hoplite

[sam]

I don't think so no, it needs to match case or your var be all lowercase

[dave08]

One of the main reasons I'm using Hoplite is to be able to override any setting using env vars in a k8s deployment... it's a pity that not all configs can be mapped to env vars...

[sam]

In general you can, it just gets more complicated if you haveAVariableLikeThis

[dave08]

Which is the standard name format in kotlin

[dave08]

It wouldn't be nice to have data classes with fields like this_setting

[sam]

right, but if you have ENVVAR should that map to envVar or enVvAr or enVvar or eNvvar like the combinations are endless

[sam]

I'm checking the code to see what we support one sec

[dave08]

How do you store these properties after having resolved them from any of the various property sources?

[sam]

it's a single big tree

[dave08]

And the names?

[sam]

everything gets merged so we support the cascading lookups

[dave08]

Are they lowercased?

[sam]

no, when a field is looked up, param mappers are applied first, which generate "alt" names so you could add your own param mapper

[sam]

which would just map accessKey to ACCESS_KEY

[sam]

a bunch of this stuff is built in, I'll let you know in a sec

[sam]

intellij is indexing so give me 4 hours 😂

[sam]

SOME_CAMEL_SETTING

will be automatically applied to someCamelSetting

[sam]

which is probably what you want

[dave08]

There's no such param mapper already existing?

[sam]

you just need to add

EnvironmentVariablesPropertySource(true,true)

as a property source

[sam]

and I think what you want will work

[dave08]

I'm trying this in a Kotlin Notebook... but I'm not sure how to provide it with the env var... and setting a system property probably doesn't work the same way?

[dave08]

I need to make sure this works before putting out my service... 🕵🏼‍♂️

[sam]

system properties are another different property service

[sam]

you could just set the env on your local computer and reload intellij and then the notebook should pick it up

[sam]

on linux that's easy, but I don't use a mac so no idea how a mac would do it

[dave08]

I'm on linux, how would you do it? Just running intellij from the command line with the env var before it?

[sam]

or do export FOO=BAR in a shell and then running intellijj from the same shell

[sam]

export will make the env var available to all processes forked from where you run the export

[dave08]

S3_CONFIGS__ACCESS_TOKEN

doesn't work

[dave08]

Even though System.getEnv() returns it

[dave08]

I have this:

val configs = ConfigLoaderBuilder.default().apply {
    addResourceSource("/application.yaml")
    val envs = listOf("local")
    envs.forEach {
        addResourceSource("/application-$it.yaml", optional = true)
    }
    addEnvironmentSource()
}.build().loadConfigOrThrow<Settings>()

[dave08]

And it just takes all my configs from application.yaml and application-local.yaml

[dave08]

This:

object MyUppercaseParamMapper : ParameterMapper {
  override fun map(param: KParameter, constructor: KFunction<Any>, kclass: KClass<*>): Set<String> =
    setOfNotNull(param.name?.fold("") { acc, c -> if (c.isUpperCase()) acc + "_" + c.uppercaseChar() else acc + c.uppercaseChar() })
}

"s3Configs.accessToken".fold("") { acc, c -> if (c.isUpperCase()) acc + "_" + c.uppercaseChar() else acc + c.uppercaseChar() }

gives me:

S3_CONFIGS.ACCESS_TOKEN

but it still doesn't work... do I also need to convert the . to __

[dave08]

?

[sam]

add EnvironmentVariablesPropertySource(true,true) explicitly rather than via addEnvironmentSource

[dave08]

Why should that help?

fun ConfigLoaderBuilder.addEnvironmentSource(
  useUnderscoresAsSeparator: Boolean = true,
  allowUppercaseNames: Boolean = true,
) = addPropertySource(
  EnvironmentVariablesPropertySource(useUnderscoresAsSeparator, allowUppercaseNames)
)

with no params the default IS true, true

[dave08]

Ok... my bad... I thought the sources had to be ordered from least priority to top priority like in Micronaut... but in Hoplite it's the opposite! For some reason, just addEnvironmentSource() works, even though I don't see how it adds the _ between where the capital letters are... it just uppercases everthing... (unless it's a combo of snake case + that...?). Thanks for all the help! As usual, you always answer our (sometimes stupid...) questions so warmly, and keep updating all your great libraries ❤️!