plugins {
    kotlin("jvm") version "1.8.0"
    id("dev.limebeck.build-time-config") version "1.0.0"
}
...
buildTimeConfig {
    config {
        packageName.set("dev.limebeck.config")
        objectName.set("MyConfig")
        destination.set(project.buildDir)

        configProperties {
            property<String>("someProp") set "SomeValue"
            property<Int>("someProp2") set 123
            property<Double>("someProp3") set 123.0
            property<Long>("someProp4") set 123L
            property<Boolean>("someProp5") set true
            obj("nested") set {
                property<String>("someProp") set "SomeValue"
            }
        }
    }
}

package dev.limebeck.config

import kotlin.Boolean
import kotlin.Double
import kotlin.Int
import kotlin.Long
import kotlin.String

public object MyConfig {
    public val someProp: String = "SomeValue"

    public val someProp2: Int = 123

    public val someProp3: Double = 123.0

    public val someProp4: Long = 123

    public val someProp5: Boolean = true

    public object nested {
        public val someProp: String = "SomeValue"
    }
}

import dev.limebeck.config.MyConfig

class Application {
    val data: String = MyConfig.someProp
    val data2: Int = MyConfig.someProp2
    val data3: Double = MyConfig.someProp3
    val data4: Long = MyConfig.someProp4
    val data5: Boolean = MyConfig.someProp5
    val obj: String = MyConfig.nested.someProp
}