Restructure the project to utilize included builds (#3174)

* Refactor and simplify artifact publishing
* Update Gradle to 8.4
* Refactor and simplify convention plugins and build scripts

Fixes #3132

---------

Co-authored-by: Adam <897017+aSemy@users.noreply.github.com>
Co-authored-by: Oleg Yukhnevich <whyoleg@gmail.com>

3 files changed, 126 insertions, 0 deletions

diff --git a/build-logic/src/main/kotlin/dokkabuild/DokkaBuildProperties.kt b/build-logic/src/main/kotlin/dokkabuild/DokkaBuildProperties.kt
new file mode 100644
index 00000000..ad39177c
--- /dev/null
+++ b/build-logic/src/main/kotlin/dokkabuild/DokkaBuildProperties.kt
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2014-2023 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package dokkabuild
+
+import org.gradle.api.provider.Provider
+import org.gradle.api.provider.ProviderFactory
+import org.gradle.jvm.toolchain.JavaLanguageVersion
+import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
+import javax.inject.Inject
+
+/**
+ * Common build properties used to build Dokka subprojects.
+ *
+ * This is an extension created by the [org.jetbrains.conventions.Base_gradle] convention plugin.
+ *
+ * Default values are set in the root `gradle.properties`, and can be overridden via
+ * [project properties](https://docs.gradle.org/current/userguide/build_environment.html#sec:project_properties)
+ */
+abstract class DokkaBuildProperties @Inject constructor(
+    private val providers: ProviderFactory,
+) {
+
+    /**
+     * The main version of Java that should be used to build Dokka source code.
+     *
+     * Updating the Java target is a breaking change.
+     */
+    val mainJavaVersion: Provider<JavaLanguageVersion> =
+        dokkaProperty("javaToolchain.mainCompiler", JavaLanguageVersion::of)
+
+    /**
+     * The version of Java that should be used to run Dokka tests.
+     *
+     * This value is set in CI/CD environments to make sure that Dokka still works with different
+     * versions of Java.
+     */
+    val testJavaLauncherVersion: Provider<JavaLanguageVersion> =
+        dokkaProperty("javaToolchain.testLauncher", JavaLanguageVersion::of)
+            .orElse(mainJavaVersion)
+
+    /**
+     * The Kotlin language level that Dokka artifacts are compiled to support.
+     *
+     * Updating the language level is a breaking change.
+     */
+    val kotlinLanguageLevel: Provider<KotlinVersion> =
+        dokkaProperty("kotlinLanguageLevel", KotlinVersion::fromVersion)
+
+
+    private fun <T : Any> dokkaProperty(name: String, convert: (String) -> T) =
+        providers.gradleProperty("org.jetbrains.dokka.$name").map(convert)
+
+    companion object {
+        const val EXTENSION_NAME = "dokkaBuild"
+    }
+}
diff --git a/build-logic/src/main/kotlin/dokkabuild/PublicationUtils.kt b/build-logic/src/main/kotlin/dokkabuild/PublicationUtils.kt
new file mode 100644
index 00000000..dd83cf5f
--- /dev/null
+++ b/build-logic/src/main/kotlin/dokkabuild/PublicationUtils.kt
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2014-2023 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package dokkabuild
+
+import org.gradle.api.Project
+import org.gradle.api.publish.PublishingExtension
+import org.gradle.api.publish.maven.MavenPublication
+import org.gradle.kotlin.dsl.configure
+import org.gradle.kotlin.dsl.withType
+
+object PublicationName {
+    const val JVM = "jvm"
+    const val GRADLE_PLUGIN = "pluginMaven"
+}
+
+fun Project.overridePublicationArtifactId(
+    artifactId: String,
+    publicationName: String = PublicationName.JVM
+) {
+    extensions.configure<PublishingExtension> {
+        publications.withType<MavenPublication>().named(publicationName) {
+            this.artifactId = artifactId
+        }
+    }
+}
diff --git a/build-logic/src/main/kotlin/dokkabuild/internal/GradleKotlinDslAccessors.kt b/build-logic/src/main/kotlin/dokkabuild/internal/GradleKotlinDslAccessors.kt
new file mode 100644
index 00000000..7b854f16
--- /dev/null
+++ b/build-logic/src/main/kotlin/dokkabuild/internal/GradleKotlinDslAccessors.kt
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2014-2023 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+@file:Suppress("PackageDirectoryMismatch")
+
+package org.gradle.kotlin.dsl // for convenience use a default package for gradle.kts scripts
+
+import org.gradle.api.Project
+import org.gradle.accessors.dm.LibrariesForLibs
+import dokkabuild.DokkaBuildProperties
+
+/*
+ * Utility functions for accessing Gradle extensions that are created by convention plugins.
+ *
+ * (Gradle can't generate the nice DSL accessors for the project that defines them)
+ *
+ * These functions are not needed outside the convention plugins project and should be marked as
+ * `internal`
+ */
+
+
+/**
+ * workaround for accessing version-catalog in convention plugins
+ *
+ * See https://github.com/gradle/gradle/issues/15383#issuecomment-779893192
+ */
+internal val Project.libs : LibrariesForLibs
+    get() = extensions.getByType()
+
+/**
+ * Retrieves the [dokkaBuild][org.jetbrains.DokkaBuildProperties] extension.
+ */
+internal val Project.dokkaBuild: DokkaBuildProperties
+    get() = extensions.getByType()
+
+/**
+ * Configures the [dokkaBuild][org.jetbrains.DokkaBuildProperties] extension.
+ */
+internal fun Project.dokkaBuild(configure: DokkaBuildProperties.() -> Unit) =
+    extensions.configure(configure)