Add K2 analysis switcher

runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/DokkaArtifacts.kt

@@ -16,6 +16,7 @@ internal class DokkaArtifacts(private val project: Project) {
 
     // TODO [beresnev] analysis switcher
     val analysisKotlinDescriptors get() = fromModuleName("analysis-kotlin-descriptors")
+    val analysisKotlinSymbols get() = fromModuleName("analysis-kotlin-symbols")
 
     val allModulesPage get() = fromModuleName("all-modules-page-plugin")
     val dokkaCore get() = fromModuleName("dokka-core")

runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/DokkaPlugin.kt

@@ -18,6 +18,13 @@ open class DokkaPlugin : Plugin<Project> {
         if (GradleVersion.version(project.gradle.gradleVersion) < GradleVersion.version("5.6")) {
             project.logger.warn("Dokka: Build is using unsupported gradle version, expected at least 5.6 but got ${project.gradle.gradleVersion}. This may result in strange errors")
         }
+        if (project.shouldUseK2())
+            project.logger.warn(
+                "Dokka's K2 Analysis is being used. " +
+                        "It is still under active development and is thus experimental. " +
+                        "It can be the cause of failed builds or incorrectly generated documentation. " +
+                        "If you encounter an issue, please consider reporting it: https://github.com/Kotlin/dokka/issues"
+            )
 
         project.setupDokkaTasks("dokkaHtml") {
             description = "Generates documentation in 'html' format"

runners/gradle-plugin/src/main/kotlin/org/jetbrains/dokka/gradle/gradleConfigurations.kt

@@ -10,6 +10,9 @@ import org.gradle.api.artifacts.Dependency
 import org.gradle.api.attributes.Usage
 import org.gradle.kotlin.dsl.named
 
+internal fun Project.shouldUseK2() =
+    (findProperty("org.jetbrains.dokka.experimental.tryK2") as? String)?.toBoolean() ?: false
+
 internal fun Project.maybeCreateDokkaDefaultPluginConfiguration(): Configuration {
     return configurations.maybeCreate("dokkaPlugin") {
         attributes.attribute(Usage.USAGE_ATTRIBUTE, project.objects.named(Usage.JAVA_RUNTIME))
@@ -29,7 +32,10 @@ internal fun Project.maybeCreateDokkaPluginConfiguration(dokkaTaskName: String,
         extendsFrom(maybeCreateDokkaDefaultPluginConfiguration())
         attributes.attribute(Usage.USAGE_ATTRIBUTE, project.objects.named(Usage.JAVA_RUNTIME))
         isCanBeConsumed = false
-        dependencies.add(project.dokkaArtifacts.analysisKotlinDescriptors)
+        dependencies.add(
+            if (shouldUseK2()) project.dokkaArtifacts.analysisKotlinSymbols
+            else project.dokkaArtifacts.analysisKotlinDescriptors
+        )
         dependencies.add(project.dokkaArtifacts.dokkaBase)
         dependencies.addAll(additionalDependencies)
     }

subprojects/analysis-kotlin-symbols/build.gradle.kts

@@ -82,7 +82,6 @@ dependencies {
 
     // TODO [beresnev] get rid of it
     compileOnly(libs.kotlinx.coroutines.core)
-
 }
 
 tasks {