Use project's kotlin compiler version and repo for the samples

kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/CopySamples.kt

@@ -8,8 +8,9 @@ import java.io.File
 
 /**
  * A task that copies samples and replaces direct repository URLs with ones provided by the cache-redirector service.
+ * This task also adds kotlin compiler repository from the project's gradle.properties file.
  */
-open class CopySamples: Copy() {
+open class CopySamples : Copy() {
     @InputDirectory
     var samplesDir: File = project.file("samples")
 
@@ -17,6 +18,7 @@ open class CopySamples: Copy() {
         from(samplesDir) {
             it.exclude("**/*.gradle.kts")
             it.exclude("**/*.gradle")
+            it.exclude("**/gradle.properties")
         }
         from(samplesDir) {
             it.include("**/*.gradle")
@@ -34,6 +36,23 @@ open class CopySamples: Copy() {
                 replacements[repo]?.let { r -> line.replace(repo, r) } ?: line
             }
         }
+        from(samplesDir) {
+            it.include("**/gradle.properties")
+
+            val kotlinVersion = project.property("kotlinVersion") as? String
+                ?: throw IllegalArgumentException("Property kotlinVersion should be specified in the root project")
+            val kotlinCompilerRepo = project.property("kotlinCompilerRepo") as? String
+                ?: throw IllegalArgumentException("Property kotlinCompilerRepo should be specified in the root project")
+
+            it.filter { line ->
+                when {
+                    line.startsWith("kotlin_version") -> "kotlin_version=$kotlinVersion"
+                    line.startsWith("#kotlinCompilerRepo") || line.startsWith("kotlinCompilerRepo") ->
+                        "kotlinCompilerRepo=$kotlinCompilerRepo"
+                    else -> line
+                }
+            }
+        }
     }
 
     override fun configure(closure: Closure<Any>): Task {

kotlin-native/samples/build.gradle.kts

@@ -3,6 +3,9 @@ buildscript {
         mavenCentral()
         maven("https://dl.bintray.com/kotlin/kotlin-dev")
         maven("https://dl.bintray.com/kotlin/kotlin-eap")
+
+        val kotlinCompilerRepo: String? by rootProject
+        kotlinCompilerRepo?.let { maven(it) }
     }
 
     val kotlin_version: String by rootProject
@@ -16,6 +19,9 @@ allprojects {
         mavenCentral()
         maven("https://dl.bintray.com/kotlin/kotlin-dev")
         maven("https://dl.bintray.com/kotlin/kotlin-eap")
+
+        val kotlinCompilerRepo: String? by rootProject
+        kotlinCompilerRepo?.let { maven(it) }
     }
 }
 

kotlin-native/samples/gradle.properties

@@ -8,6 +8,9 @@ org.gradle.workers.max=4
 # CHANGE_VERSION_WITH_RELEASE
 kotlin_version=1.4.10
 
+# Sets maven path for the kotlin version other than release
+#kotlinCompilerRepo=
+
 # Use custom Kotlin/Native home:
 kotlin.native.home=../../dist