Make some build properties extensions in buildSrc

They are used only in main build's .gradle.kts files, so it is more
flexible to define them as extensions - no need to republish
kotlin-build-gradle-plugin when another such property is to be added.

buildSrc/src/main/kotlin/BuildPropertiesExt.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+val KotlinBuildProperties.includeJava9: Boolean
+    get() = !isInJpsBuildIdeaSync && getBoolean("kotlin.build.java9", true)
+
+val KotlinBuildProperties.useBootstrapStdlib: Boolean
+    get() = isInJpsBuildIdeaSync || getBoolean("kotlin.build.useBootstrapStdlib", false)
+
+val KotlinBuildProperties.postProcessing: Boolean get() = isTeamcityBuild || getBoolean("kotlin.build.postprocessing", true)
+
+val KotlinBuildProperties.relocation: Boolean get() = postProcessing
+
+val KotlinBuildProperties.proguard: Boolean get() = postProcessing && getBoolean("kotlin.build.proguard", isTeamcityBuild)
+
+val KotlinBuildProperties.jarCompression: Boolean get() = getBoolean("kotlin.build.jar.compression", isTeamcityBuild)

dependencies/kotlin-build-gradle-plugin/src/BuildProperties.kt

@@ -33,10 +33,10 @@ class KotlinBuildProperties(
         }
     }
 
-    private fun getOrNull(key: String): Any? =
+    fun getOrNull(key: String): Any? =
         localProperties.getProperty(key) ?: propertiesProvider.getProperty(key) ?: rootProperties.getProperty(key)
 
-    private fun getBoolean(key: String, default: Boolean = false): Boolean =
+    fun getBoolean(key: String, default: Boolean = false): Boolean =
         this.getOrNull(key)?.toString()?.trim()?.toBoolean() ?: default
 
     private fun hasProperty(key: String): Boolean = getOrNull(key) != null
@@ -61,12 +61,6 @@ class KotlinBuildProperties(
     val isInJpsBuildIdeaSync: Boolean
         get() = isJpsBuildEnabled && isInIdeaSync
 
-    val includeJava9: Boolean
-        get() = !isInJpsBuildIdeaSync && getBoolean("kotlin.build.java9", true)
-
-    val useBootstrapStdlib: Boolean
-        get() = isInJpsBuildIdeaSync || getBoolean("kotlin.build.useBootstrapStdlib", false)
-
     private val kotlinUltimateExists: Boolean = propertiesProvider.rootProjectDir.resolve("kotlin-ultimate").exists()
 
     val isTeamcityBuild: Boolean = getBoolean("teamcity") || System.getenv("TEAMCITY_VERSION") != null
@@ -84,14 +78,6 @@ class KotlinBuildProperties(
 
     val includeUltimate: Boolean = kotlinUltimateExists && (isTeamcityBuild || intellijUltimateEnabled)
 
-    val postProcessing: Boolean get() = isTeamcityBuild || getBoolean("kotlin.build.postprocessing", true)
-
-    val relocation: Boolean get() = postProcessing
-
-    val proguard: Boolean get() = postProcessing && getBoolean("kotlin.build.proguard", isTeamcityBuild)
-
-    val jarCompression: Boolean get() = getBoolean("kotlin.build.jar.compression", isTeamcityBuild)
-
     val buildCacheUrl: String? = getOrNull("kotlin.build.cache.url") as String?
 
     val pushToBuildCache: Boolean = getBoolean("kotlin.build.cache.push", isTeamcityBuild)

libraries/kotlin.test/jvm/build.gradle

@@ -5,7 +5,7 @@ apply plugin: 'kotlin-platform-jvm'
 configureJvm6Project(project)
 configurePublishing(project)
 
-def includeJava9 = BuildPropertiesKt.getKotlinBuildProperties(project).includeJava9
+def includeJava9 = BuildPropertiesExtKt.getIncludeJava9(project.kotlinBuildProperties)
 
 sourceSets {
     if (includeJava9) {

libraries/reflect/api/build.gradle

@@ -4,7 +4,7 @@ apply plugin: 'kotlin'
 
 configureJvm6Project(project)
 
-def includeJava9 = BuildPropertiesKt.getKotlinBuildProperties(project).includeJava9
+def includeJava9 = BuildPropertiesExtKt.getIncludeJava9(project.kotlinBuildProperties)
 
 sourceSets {
     main {