Allow to specify target and templates directory with Gradle properties

libraries/tools/kotlin-stdlib-docs/build.gradle.kts

@@ -12,7 +12,7 @@ evaluationDependsOnChildren()
 
 fun pKotlinBig() = project("kotlin_big").ext
 
-val outputDir = file("$buildDir/doc")
+val outputDir = file(findProperty("docsBuildDir") as String? ?: "$buildDir/doc")
 val outputDirLatest = file("$outputDir/latest")
 val outputDirPrevious = file("$outputDir/previous")
 val kotlin_root: String by pKotlinBig()
@@ -21,12 +21,16 @@ val kotlin_native_root = file("$kotlin_root/kotlin-native").absolutePath
 val github_revision: String by pKotlinBig()
 val localRoot = kotlin_root
 val baseUrl = URL("https://github.com/JetBrains/kotlin/tree/$github_revision")
-val templatesDir = file("$projectDir/templates").invariantSeparatorsPath
+val templatesDir = file(findProperty("templatesDir") as String? ?: "$projectDir/templates").invariantSeparatorsPath
 
 val cleanDocs by tasks.registering(Delete::class) {
     delete(outputDir)
 }
 
+tasks.clean {
+    dependsOn(cleanDocs)
+}
+
 val prepare by tasks.registering {
     dependsOn(":kotlin_big:extractLibs")
 }