Expose reportDir property in KoverHtmlReport interface

kover-gradle-plugin/api/kover-gradle-plugin.api

@@ -304,6 +304,7 @@ public abstract interface class kotlinx/kover/gradle/plugin/dsl/tasks/KoverBinar
 }
 
 public abstract interface class kotlinx/kover/gradle/plugin/dsl/tasks/KoverHtmlReport : kotlinx/kover/gradle/plugin/dsl/tasks/KoverReport {
+	public abstract fun getReportDir ()Lorg/gradle/api/provider/Provider;
 }
 
 public abstract interface class kotlinx/kover/gradle/plugin/dsl/tasks/KoverLogReport : kotlinx/kover/gradle/plugin/dsl/tasks/KoverReport {

kover-gradle-plugin/src/functionalTest/kotlin/kotlinx/kover/gradle/plugin/test/functional/cases/TaskInterfacesTests.kt

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2017-2023 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+package kotlinx.kover.gradle.plugin.test.functional.cases
+
+import kotlinx.kover.gradle.plugin.test.functional.framework.runner.generateBuild
+import kotlinx.kover.gradle.plugin.test.functional.framework.runner.runWithParams
+import org.junit.jupiter.api.Test
+import kotlin.test.assertTrue
+
+internal class TaskInterfacesTests {
+
+    @Test
+    fun testDefaultHtmlDir() {
+        val build = generateBuild { dir ->
+            dir.resolve("settings.gradle.kts").createNewFile()
+
+            dir.resolve("build.gradle.kts").writeText(
+                """
+                import kotlinx.kover.gradle.plugin.dsl.tasks.KoverHtmlReport
+
+                plugins {
+                    kotlin("jvm") version "1.9.22"
+                    id("org.jetbrains.kotlinx.kover")
+                }
+
+                tasks.register("checkDir") {
+                    doFirst {
+                        val task = tasks.withType<KoverHtmlReport>().matching { it.name == "koverHtmlReport" }.first()
+                        if (task.reportDir.get().asFile != layout.buildDirectory.dir("reports/kover/html").get().asFile) {
+                            throw Exception("Default directory differ, expect ${'$'}{layout.buildDirectory.dir("reports/kover/html").get().asFile} actual ${'$'}{task.reportDir.get().asFile}")
+                        }
+                    }
+                }
+            """.trimIndent()
+            )
+        }.generate()
+
+        val result = build.runWithParams("checkDir")
+        assertTrue(result.isSuccessful)
+    }
+
+    @Test
+    fun testCustomHtmlDir() {
+        val build = generateBuild { dir ->
+            dir.resolve("settings.gradle.kts").createNewFile()
+
+            dir.resolve("build.gradle.kts").writeText(
+                """
+                import kotlinx.kover.gradle.plugin.dsl.tasks.KoverHtmlReport
+
+                plugins {
+                    kotlin("jvm") version "1.9.22"
+                    id("org.jetbrains.kotlinx.kover")
+                }
+
+                kover {
+                    reports {
+                        total {
+                            html {
+                                htmlDir.set(layout.buildDirectory.dir("customHtmlReport"))
+                            }
+                        }
+                    }
+                }
+
+                tasks.register("checkDir") {
+                    doFirst {
+                        val task = tasks.withType<KoverHtmlReport>().matching { it.name == "koverHtmlReport" }.first()
+                        if (task.reportDir.get().asFile != layout.buildDirectory.dir("customHtmlReport").get().asFile) {
+                            throw Exception("Custom directory differ, expect ${'$'}{layout.buildDirectory.dir("customHtmlReport").get().asFile} actual ${'$'}{task.reportDir.get().asFile}")
+                        }
+                    }
+                }
+            """.trimIndent()
+            )
+        }.generate()
+
+        val result = build.runWithParams("checkDir")
+        assertTrue(result.isSuccessful)
+    }
+}

kover-gradle-plugin/src/main/kotlin/kotlinx/kover/gradle/plugin/dsl/tasks/KoverTasks.kt

@@ -5,6 +5,9 @@
 package kotlinx.kover.gradle.plugin.dsl.tasks
 
 import org.gradle.api.Task
+import org.gradle.api.file.Directory
+import org.gradle.api.provider.Provider
+import org.gradle.api.tasks.OutputDirectory
 
 /**
  *  Common interface for all Kover report tasks.
@@ -19,7 +22,13 @@ interface KoverXmlReport: KoverReport
 /**
  * Interface for Kover HTML report generation tasks.
  */
-interface KoverHtmlReport: KoverReport
+interface KoverHtmlReport: KoverReport {
+    /**
+     * The directory where the HTML report will be saved.
+     */
+    @get:OutputDirectory
+    val reportDir: Provider<Directory>
+}
 
 /**
  * Interface for Kover tasks that print coverage to the build log.

kover-gradle-plugin/src/main/kotlin/kotlinx/kover/gradle/plugin/tasks/reports/KoverHtmlTask.kt

@@ -14,7 +14,7 @@ import java.net.URI
 @CacheableTask
 internal abstract class KoverHtmlTask : AbstractKoverReportTask(), KoverHtmlReport {
     @get:OutputDirectory
-    abstract val reportDir: DirectoryProperty
+    abstract override val reportDir: DirectoryProperty
 
     @get:Input
     abstract val title: Property<String>