from Groovy to Kotlin, what is

run {
    environment("TF_CPP_MIN_LOG_LEVEL", "1") // turn off TensorFlow print out
    systemProperties System.getProperties()
    systemProperties.remove("user.dir")
    systemProperty("file.encoding", "UTF-8")
}

?

Limited context as to what

run

is; perhaps that is a run task, which can be accessed via

tasks.named<Type>("run")

(

Type

is a placeholder for whatever type the run task is). The rest of it is almost there, other than brackets around

System.getProperties()

Just a heads-up: gradle support warned me about

systemProperties System.getProperties()

. It's really dangerous to just copy over all system properties to a task invocation. You should really be specific about the properties you'd like to expose inside the task, or you might get very strange issues.