Exclude directory from indexing within gradle projects

You need to set exclude at build.gradle, IDEA will always overwrite project settings at File | Project structure with settings taken from build.gradle.

> You need to set exclude at build.gradle

@... How to do that?

Please check related thread: https://discuss.gradle.org/t/how-can-i-declare-an-exclusion-on-my-source-folder/22821

You can exclude a directory in IntelliJ with this Gradle (Kotlin) config:

plugins {
  id("org.jetbrains.gradle.plugin.idea-ext") version "1.0"
}

idea {
  module {
    excludeDirs = setOf(file("out"))
  }
}