JPS build: add idea settings to build.gradle.kts

#KT-29323 Fixed

build.gradle.kts

@@ -5,6 +5,8 @@ import org.gradle.api.file.FileCollection
 import org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import proguard.gradle.ProGuardTask
+import org.gradle.kotlin.dsl.*
+import org.jetbrains.gradle.ext.ActionDelegationConfig.TestRunner.*
 
 buildscript {
     extra["defaultSnapshotVersion"] = "1.3-SNAPSHOT"
@@ -35,6 +37,7 @@ plugins {
     `build-scan` version "1.15"
     idea
     id("jps-compatible")
+    id("org.jetbrains.gradle.plugin.idea-ext")
 }
 
 pill {
@@ -807,3 +810,37 @@ allprojects {
         }
     }
 }
+
+allprojects {
+    apply(mapOf("plugin" to "idea"))
+}
+
+val isJpsBuildEnabled = findProperty("jpsBuild")?.toString() == "true"
+if (isJpsBuildEnabled) {
+    afterEvaluate {
+        allprojects {
+            idea {
+                module {
+                    inheritOutputDirs = true
+                }
+            }
+        }
+
+        rootProject.idea {
+            project {
+                settings {
+                    compiler {
+                        processHeapSize = 2000
+                        addNotNullAssertions = true
+                        parallelCompilation = true
+                    }
+
+                    delegateActions {
+                        delegateBuildRunToGradle = false
+                        testRunner = PLATFORM
+                    }
+                }
+            }
+        }
+    }
+}

buildSrc/build.gradle.kts

@@ -87,6 +87,7 @@ repositories {
 
     jcenter()
     maven("https://jetbrains.bintray.com/intellij-third-party-dependencies/")
+    maven("https://plugins.gradle.org/m2/")
 }
 
 dependencies {
@@ -97,6 +98,8 @@ dependencies {
 
     compile("com.github.jengelman.gradle.plugins:shadow:${property("versions.shadow")}")
     compile("org.jetbrains.intellij.deps:asm-all:7.0")
+
+    compile("gradle.plugin.org.jetbrains.gradle.plugin.idea-ext:gradle-idea-ext:0.4.2")
 }
 
 samWithReceiver {