Replicating `spring.active.profiles`

SpringLikeHoconProfile.kt

fun profileAwareConfig(): Config {
    val logger = LoggerFactory.getLogger("ProfileAwareConfig")
    val profiles = (System.getProperty("ktor.active.profiles") ?: "").split(",")

    val combinedConfig = profiles.fold(ConfigFactory.defaultApplication()) { config, profile ->
        val profileConfig = ConfigFactory.parseResourcesAnySyntax("application-$profile")
        profileConfig.withFallback(config)
    }

    if (logger.isDebugEnabled) {
        logger.debug(combinedConfig.root().render())
    }

    return ConfigFactory.load(combinedConfig)
}

Usage.kt

fun main() {
    embeddedServer(Netty, applicationEngineEnvironment {
        config = HoconApplicationConfig(profileAwareConfig())
        connector {
            port = config.property("ktor.deployment.port").getString().toInt()
        }
        module {
            mainModule()
        }
    }).start(true)
}