[Gradle] Fix documentation publishing to Kotlinlang

The Template was applied only to the final aggregate, but not to the
partial tasks.

^KT-73128 Fixed

Author: Tapchicoma

libraries/tools/gradle/documentation/Readme.md

@@ -4,7 +4,7 @@ This project assembles API reference for Kotlin Gradle plugins to publish it to
 
 ### Configuration
 
-- `build/templates` dir is used for Kotlinlang website templates. Currently, they should be put there manually.
+- `<root_dir>/build/api-reference/templates/` dir is used for Kotlinlang website templates. Currently, they should be put there manually.
 - `build/documentation/kotlinlangOld` directory is used for previously generated documentation.
   Inside the structure of subdirectories 
 should follow [this specification](https://github.com/Kotlin/dokka/tree/1.9.20/dokka-subprojects/plugin-versioning#directory-structure).

libraries/tools/gradle/documentation/build.gradle.kts

@@ -8,8 +8,6 @@ pluginsApiDocumentation {
     templatesArchiveUrl = "https://github.com/JetBrains/kotlin-web-site/archive/refs/heads/master.zip"
     templatesArchiveSubDirectoryPattern = "kotlin-web-site-master/dokka-templates/**"
     templatesArchivePrefixToRemove = "kotlin-web-site-master/dokka-templates/"
-    gradlePluginsProjects = setOf(
-        project(":kotlin-gradle-plugin-api"),
-        project(":compose-compiler-gradle-plugin")
-    )
+    addGradlePluginProject(project(":kotlin-gradle-plugin-api"))
+    addGradlePluginProject(project(":compose-compiler-gradle-plugin"))
 }

repo/gradle-build-conventions/gradle-plugins-documentation/src/main/kotlin/PluginsApiDocumentationExtension.kt

@@ -12,11 +12,17 @@ import javax.inject.Inject
 
 abstract class PluginsApiDocumentationExtension @Inject constructor(
     objectFactory: ObjectFactory,
+    private val childProjectConfiguration: (Project) -> Unit
 ) {
     abstract val documentationOutput: DirectoryProperty
     abstract val documentationOldVersions: DirectoryProperty
     abstract val templatesArchiveUrl: Property<String>
     val templatesArchiveSubDirectoryPattern: Property<String> = objectFactory.property(String::class.java).convention("")
     val templatesArchivePrefixToRemove: Property<String> = objectFactory.property(String::class.java).convention("")
-    abstract val gradlePluginsProjects: SetProperty<Project>
+    internal abstract val gradlePluginsProjects: SetProperty<Project>
+
+    fun addGradlePluginProject(project: Project) {
+        gradlePluginsProjects.add(project)
+        childProjectConfiguration(project)
+    }
 }

repo/gradle-build-conventions/gradle-plugins-documentation/src/main/kotlin/gradle-plugins-documentation.gradle.kts

@@ -1,13 +1,26 @@
 import de.undercouch.gradle.tasks.download.Download
 import gradle.publishGradlePluginsJavadoc
 import org.jetbrains.dokka.gradle.DokkaMultiModuleFileLayout
+import org.jetbrains.dokka.gradle.DokkaTaskPartial
 
 plugins {
     id("org.jetbrains.dokka")
     base
 }
 
-val documentationExtension = extensions.create<PluginsApiDocumentationExtension>("pluginsApiDocumentation")
+val templateConfig = Pair(
+    "org.jetbrains.dokka.base.DokkaBase",
+    "{ \"templatesDir\": \"${project.rootDir.resolve("build/api-reference/templates").also { it.mkdirs() }}\" }"
+)
+
+val documentationExtension = extensions.create<PluginsApiDocumentationExtension>(
+    "pluginsApiDocumentation",
+    { project: Project ->
+        project.tasks.withType<DokkaTaskPartial>().configureEach {
+            pluginsMapConfiguration.put(templateConfig.first, templateConfig.second)
+        }
+    }
+)
 
 dependencies {
     dokkaPlugin(versionCatalogs.named("libs").findLibrary("dokka-versioningPlugin").get())
@@ -67,10 +80,7 @@ tasks.register<org.jetbrains.dokka.gradle.DokkaMultiModuleTask>("dokkaKotlinlang
     )
 
     dependsOn(unzipTemplates)
-    pluginsMapConfiguration.put(
-        "org.jetbrains.dokka.base.DokkaBase",
-        "{ \"templatesDir\": \"${unzipTemplates.map { it.destinationDir }.get().also { it.mkdirs() }}\" }"
-    )
+    pluginsMapConfiguration.put(templateConfig.first, templateConfig.second)
 
     // Documentation: https://github.com/Kotlin/dokka/tree/1.9.20/dokka-subprojects/plugin-versioning
     pluginsMapConfiguration.put(