diff --git a/.gitignore b/.gitignore
index 117f6dccdfb..c7e0101d301 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,4 +39,5 @@ build/
 kotlin-ultimate/
 node_modules/
 .rpt2_cache/
-libraries/tools/kotlin-test-nodejs-runner/lib/
\ No newline at end of file
+libraries/tools/kotlin-test-nodejs-runner/lib/
+local.properties
diff --git a/buildSrc/src/main/kotlin/buildProperties.kt b/buildSrc/src/main/kotlin/buildProperties.kt
new file mode 100644
index 00000000000..8d9f84d285b
--- /dev/null
+++ b/buildSrc/src/main/kotlin/buildProperties.kt
@@ -0,0 +1,88 @@
+import org.gradle.api.Project
+import org.gradle.api.initialization.Settings
+import org.gradle.api.internal.DynamicObjectAware
+import java.io.File
+import java.util.*
+
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+interface PropertiesProvider {
+    val rootProjectDir: File
+    fun getProperty(key: String): Any?
+}
+
+class KotlinBuildProperties(
+    private val propertiesProvider: PropertiesProvider
+) {
+    private val localProperties: Properties = Properties()
+
+    init {
+        val localPropertiesFile = propertiesProvider.rootProjectDir.resolve("local.properties")
+        if (localPropertiesFile.isFile) {
+            localPropertiesFile.reader().use(localProperties::load)
+        }
+    }
+
+    private operator fun get(key: String): Any? = localProperties.getProperty(key) ?: propertiesProvider.getProperty(key)
+
+    private fun getBoolean(key: String): Boolean = this[key]?.toString() == "true"
+
+    val isJpsBuildEnabled: Boolean = getBoolean("jpsBuild")
+
+    val isInIdeaSync: Boolean = run {
+        // "idea.sync.active" was introduced in 2019.1
+        System.getProperty("idea.sync.active")?.toBoolean() == true || let {
+            // before 2019.1 there is "idea.active" that was true only on sync,
+            // but since 2019.1 "idea.active" present in task execution too.
+            // So let's check Idea version
+            val majorIdeaVersion = System.getProperty("idea.version")
+                ?.split(".")
+                ?.getOrNull(0)
+            val isBeforeIdea2019 = majorIdeaVersion == null || majorIdeaVersion.toInt() < 2019
+
+            isBeforeIdea2019 && System.getProperty("idea.active")?.toBoolean() == true
+        }
+    }
+
+    val isInJpsBuildIdeaSync: Boolean
+        get() = isJpsBuildEnabled && isInIdeaSync
+
+    val includeJava9: Boolean
+        get() = !isInJpsBuildIdeaSync
+}
+
+private const val extensionName = "kotlinBuildFlags"
+
+class ProjectProperties(val project: Project): PropertiesProvider {
+    override val rootProjectDir: File
+        get() = project.projectDir
+
+    override fun getProperty(key: String): Any? = project.findProperty(key)
+}
+
+val Project.kotlinBuildProperties: KotlinBuildProperties
+    get() = rootProject.extensions.findByName(extensionName) as KotlinBuildProperties?
+        ?: KotlinBuildProperties(ProjectProperties(rootProject)).also {
+            rootProject.extensions.add(extensionName, it)
+        }
+
+class SettingsProperties(val settings: Settings): PropertiesProvider {
+    override val rootProjectDir: File
+        get() = settings.rootDir
+
+    override fun getProperty(key: String): Any? {
+        val obj = (settings as DynamicObjectAware).asDynamicObject
+        return if (obj.hasProperty(key)) obj.getProperty(key) else null
+    }
+}
+
+fun getKotlinBuildPropertiesForSettings(settings: Any) = (settings as Settings).kotlinBuildProperties
+
+val Settings.kotlinBuildProperties: KotlinBuildProperties
+    get() = extensions.findByName(extensionName) as KotlinBuildProperties?
+        ?: KotlinBuildProperties(SettingsProperties(this)).also {
+            extensions.add(extensionName, it)
+        }
\ No newline at end of file
diff --git a/buildSrc/src/main/kotlin/dependencies.kt b/buildSrc/src/main/kotlin/dependencies.kt
index 713f2e8d02b..54988c1dbc9 100644
--- a/buildSrc/src/main/kotlin/dependencies.kt
+++ b/buildSrc/src/main/kotlin/dependencies.kt
@@ -1,12 +1,14 @@
-@file:Suppress("unused") // usages in build scripts are not tracked properly
+@file:Suppress("unused")
 
+// usages in build scripts are not tracked properly
+
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import org.gradle.api.GradleException
 import org.gradle.api.Project
 import org.gradle.api.artifacts.ProjectDependency
 import org.gradle.api.artifacts.dsl.DependencyHandler
 import org.gradle.api.file.ConfigurableFileCollection
 import org.gradle.api.tasks.AbstractCopyTask
-import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import org.gradle.kotlin.dsl.extra
 import org.gradle.kotlin.dsl.project
 import java.io.File
@@ -73,8 +75,8 @@ fun Project.ideaUltimatePreloadedDeps(vararg artifactBaseNames: String, subdir:
 
 fun Project.kotlinDep(artifactBaseName: String, version: String): String = "org.jetbrains.kotlin:kotlin-$artifactBaseName:$version"
 
-val Project.useBootstrapStdlib: Boolean get() =
-    findProperty("jpsBuild")?.toString() == "true"
+val Project.useBootstrapStdlib: Boolean
+    get() = kotlinBuildProperties.isInJpsBuildIdeaSync
 
 fun Project.kotlinStdlib(suffix: String? = null): Any {
     return if (useBootstrapStdlib)
diff --git a/compiler/build.gradle.kts b/compiler/build.gradle.kts
index 9d5c588b6ab..d3d77b4d0dc 100644
--- a/compiler/build.gradle.kts
+++ b/compiler/build.gradle.kts
@@ -1,7 +1,6 @@
 import java.io.File
 import org.gradle.api.tasks.bundling.Jar
 import org.jetbrains.kotlin.gradle.dsl.KotlinCompile
-import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompile
 
 plugins {
     kotlin("jvm")
@@ -67,7 +66,7 @@ dependencies {
     antLauncherJar(files(toolsJar()))
 
     // For JPS build
-    if (System.getProperty("idea.active") != null) {
+    if (project.kotlinBuildProperties.isInJpsBuildIdeaSync) {
         testRuntimeOnly(files("${rootProject.projectDir}/dist/kotlinc/lib/kotlin-reflect.jar"))
     }
 }
diff --git a/gradle/jps.gradle.kts b/gradle/jps.gradle.kts
index c7a4f5a8a6c..39ebc90bf10 100644
--- a/gradle/jps.gradle.kts
+++ b/gradle/jps.gradle.kts
@@ -2,7 +2,6 @@ import org.jetbrains.gradle.ext.*
 import org.jetbrains.kotlin.ideaExt.*
 import org.jetbrains.kotlin.buildUtils.idea.*
 
-val isJpsBuildEnabled = findProperty("jpsBuild")?.toString() == "true"
 val ideaPluginDir: File by extra
 val ideaSandboxDir: File by extra
 val ideaSdkPath: String
@@ -29,7 +28,7 @@ fun org.jetbrains.gradle.ext.JUnit.configureForKotlin() {
     workingDirectory = rootDir.toString()
 }
 
-if (isJpsBuildEnabled && System.getProperty("idea.active") != null) {
+if (kotlinBuildProperties.isInJpsBuildIdeaSync) {
     allprojects {
         apply(mapOf("plugin" to "idea"))
     }
diff --git a/idea/build.gradle.kts b/idea/build.gradle.kts
index 8c9c5507ebf..f3aa00daa5a 100644
--- a/idea/build.gradle.kts
+++ b/idea/build.gradle.kts
@@ -1,5 +1,3 @@
-import org.gradle.jvm.tasks.Jar
-
 plugins {
     kotlin("jvm")
     id("jps-compatible")
@@ -126,7 +124,9 @@ dependencies {
     testRuntime(intellijPluginDep("smali"))
     testRuntime(intellijPluginDep("testng"))
 
-    if (System.getProperty("idea.active") != null) testRuntimeOnly(files("${rootProject.projectDir}/dist/kotlinc/lib/kotlin-reflect.jar"))
+    if (project.kotlinBuildProperties.isInJpsBuildIdeaSync) {
+        testRuntimeOnly(files("${rootProject.projectDir}/dist/kotlinc/lib/kotlin-reflect.jar"))
+    }
 }
 sourceSets {
     "main" {
diff --git a/libraries/kotlin.test/jvm/build.gradle b/libraries/kotlin.test/jvm/build.gradle
index 4dc65daa8b2..cfbd6fe2e0c 100644
--- a/libraries/kotlin.test/jvm/build.gradle
+++ b/libraries/kotlin.test/jvm/build.gradle
@@ -11,10 +11,10 @@ pill {
     importAsLibrary = true
 }
 
-def jpsBuild = findProperty("jpsBuild")?.toString() == "true"
+def includeJava9 = BuildPropertiesKt.getKotlinBuildProperties(project).includeJava9
 
 sourceSets {
-    if (!jpsBuild) {
+    if (includeJava9) {
         java9
     }
 }
@@ -40,7 +40,7 @@ task modularJar(type: Jar) {
     classifier = 'modular'
 
     from zipTree(jar.outputs.files.singleFile)
-    if (!jpsBuild) {
+    if (includeJava9) {
         from sourceSets.java9.output
     }
 }
@@ -66,6 +66,6 @@ compileTestKotlin {
     kotlinOptions.freeCompilerArgs = ["-Xallow-kotlin-package"]
 }
 
-if (!jpsBuild) {
+if (includeJava9) {
     compileJava9Sources(project, 'kotlin.test')
 }
diff --git a/libraries/reflect/api/build.gradle b/libraries/reflect/api/build.gradle
index 5549f9bf6bb..cdaaa1fca8c 100644
--- a/libraries/reflect/api/build.gradle
+++ b/libraries/reflect/api/build.gradle
@@ -4,7 +4,7 @@ apply plugin: 'kotlin'
 
 configureJvm6Project(project)
 
-def jpsBuild = findProperty("jpsBuild")?.toString() == "true"
+def includeJava9 = BuildPropertiesKt.getKotlinBuildProperties(project).includeJava9
 
 sourceSets {
     main {
@@ -13,7 +13,7 @@ sourceSets {
         }
     }
 
-    if (!jpsBuild) {
+    if (includeJava9) {
         java9
     }
 }
@@ -28,7 +28,7 @@ dependencies {
     compileOnly "org.jetbrains:annotations:13.0"
 }
 
-if (!jpsBuild) {
+if (includeJava9) {
     compileJava9Sources(
             project, 'kotlin.reflect',
             [sourceSets.main.output, configurations.compileOnly.filter {
@@ -52,7 +52,7 @@ jar {
 
 task java9Jar(type: Jar) {
     classifier = "java9"
-    if (!jpsBuild) {
+    if (includeJava9) {
         from sourceSets.java9.output
     }
 }
diff --git a/libraries/stdlib/jdk7/build.gradle b/libraries/stdlib/jdk7/build.gradle
index 7b86beee3e9..149c21a268c 100644
--- a/libraries/stdlib/jdk7/build.gradle
+++ b/libraries/stdlib/jdk7/build.gradle
@@ -26,7 +26,7 @@ sourceSets {
     test {
         kotlin {
             srcDir 'test'
-            if(!System.properties.'idea.active') {
+            if(!BuildPropertiesKt.getKotlinBuildProperties(project).inIdeaSync) {
                 srcDir '../jvm/test'
                 srcDir '../common/test'
                 srcDir '../test'
diff --git a/libraries/stdlib/jdk8/build.gradle b/libraries/stdlib/jdk8/build.gradle
index f04ffad8101..b496732ea05 100644
--- a/libraries/stdlib/jdk8/build.gradle
+++ b/libraries/stdlib/jdk8/build.gradle
@@ -28,7 +28,7 @@ sourceSets {
     test {
         kotlin {
             srcDir 'test'
-            if(!System.properties.'idea.active') {
+            if(!BuildPropertiesKt.getKotlinBuildProperties(project).inIdeaSync) {
                 srcDir '../jvm/test'
                 srcDir '../common/test'
                 srcDir '../test'
diff --git a/libraries/stdlib/js/build.gradle b/libraries/stdlib/js/build.gradle
index 6c6c0fb04f0..76f61dc5130 100644
--- a/libraries/stdlib/js/build.gradle
+++ b/libraries/stdlib/js/build.gradle
@@ -51,7 +51,7 @@ sourceSets {
     }
 
     experimental {
-        if(!System.properties.'idea.active')
+        if(!BuildPropertiesKt.getKotlinBuildProperties(project).inIdeaSync)
         kotlin {
             srcDir experimentalSrcDir
         }
diff --git a/libraries/stdlib/jvm/build.gradle b/libraries/stdlib/jvm/build.gradle
index ba4fc940e95..9e97f6fb218 100644
--- a/libraries/stdlib/jvm/build.gradle
+++ b/libraries/stdlib/jvm/build.gradle
@@ -38,7 +38,7 @@ sourceSets {
     }
     coroutinesExperimentalMigrationTest {
         kotlin {
-            if(!System.properties.'idea.active') {
+            if(!BuildPropertiesKt.getKotlinBuildProperties(project).inIdeaSync) {
                 srcDir '../coroutines-experimental/jvm/test'
             }
         }
diff --git a/settings.gradle b/settings.gradle
index bb40211b124..a7175fb32b8 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -219,8 +219,9 @@ if (isTeamcityBuild || includeUltimate) {
     )
 }
 
-def isJpsBuild = hasProperty("jpsBuild") && jpsBuild == 'true'
-if (isJpsBuild) {
+def flags = BuildPropertiesKt.getKotlinBuildPropertiesForSettings(settings)
+
+if (flags.inJpsBuildIdeaSync) {
     include ":kotlin-stdlib:jps-build"
     project(":kotlin-stdlib:jps-build").projectDir = "$rootDir/libraries/stdlib/jps-build" as File
 } else {