This message was deleted.

Nothing built into Gradle; here is what I typically use (covers Windows, MacOS, Linux - other OSs not supported, though that could be added).

/**
 * Represents an Operating System for the purposes of build script usage.
 */
sealed class Os(private val name: String) {
    companion object {
        val current by lazy {
            val osName = SystemProperty.OsName.requiredValue.lowercase()
            when {
                osName.contains("windows") -> Windows
                osName.contains("mac os x") || osName.contains("darwin") || osName.contains("osx") -> Unix.MacOs
                osName.contains("linux") -> Unix.Linux
                else -> error("Unknown operating system: $osName")
            }
        }
    }

    object Predicates {
        val Unix : (Os) -> Boolean = { os -> os is Unix }
        val Windows : (Os) -> Boolean = { os -> os is Windows }
    }

    open val pathSeparator = ":"
    open val executableExtension = ""

    override fun toString(): String {
        return "Os(name='$name')"
    }

    data object Windows : Os("Windows") {
        override val executableExtension = ".exe"
        override val pathSeparator = ";"
    }

    sealed class Unix(name : String) : Os(name) {
        data object Linux : Unix("Linux")
        data object MacOs : Unix("MacOS")
    }
}

Gradle itself does basically the same thing but includes sunos/solaris and freebsd

Ant is a first-class citizen, so just use its classes

Odd, I tried that before, but the IDE wasn't resolving

Os

. Putting in the FQN worked though. Thanks!

If you do it in Groovy DSL, it often happens that the imports are partly colored red while actually working

It was with the Kotlin DSL. I tried again in another IDE and it took a few seconds for it to show up. Maybe an indexing issue