Revert JVM tasks configuration changes introduced in Kotlin#200 (Kotl…

…in#212)

* Rollback task skipping logic based on srcset emptyness check for JVM tasks

src/functionalTest/kotlin/kotlinx/validation/api/Assert.kt

@@ -31,6 +31,13 @@ internal fun BuildResult.assertTaskSkipped(task: String) {
     assertTaskOutcome(TaskOutcome.SKIPPED, task)
 }
 
+/**
+ * Helper `fun` for asserting a [TaskOutcome] to be equal to [TaskOutcome.UP_TO_DATE]
+ */
+internal fun BuildResult.assertTaskUpToDate(task: String) {
+    assertTaskOutcome(TaskOutcome.UP_TO_DATE, task)
+}
+
 private fun BuildResult.assertTaskOutcome(taskOutcome: TaskOutcome, taskName: String) {
     assertEquals(taskOutcome, task(taskName)?.outcome)
 }

src/functionalTest/kotlin/kotlinx/validation/test/JvmProjectTests.kt

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2016-2024 JetBrains s.r.o.
+ * Use of this source code is governed by the Apache 2.0 License that can be found in the LICENSE.txt file.
+ */
+
+package kotlinx.validation.test
+
+import kotlinx.validation.api.*
+import kotlinx.validation.api.resolve
+import kotlinx.validation.api.test
+import org.assertj.core.api.Assertions
+import org.junit.Test
+
+class JvmProjectTests : BaseKotlinGradleTest() {
+    @Test
+    fun `apiDump for a project with generated sources only`() {
+        val runner = test {
+            buildGradleKts {
+                resolve("/examples/gradle/base/withPlugin.gradle.kts")
+                resolve("/examples/gradle/configuration/generatedSources/generatedJvmSources.gradle.kts")
+            }
+            // TODO: enable configuration cache back when we start skipping tasks correctly
+            runner(withConfigurationCache = false) {
+                arguments.add(":apiDump")
+            }
+        }
+        runner.build().apply {
+            assertTaskSuccess(":apiDump")
+
+            val expectedApi = readFileList("/examples/classes/GeneratedSources.dump")
+            Assertions.assertThat(rootProjectApiDump.readText()).isEqualToIgnoringNewLines(expectedApi)
+        }
+    }
+
+    @Test
+    fun `apiCheck for a project with generated sources only`() {
+        val runner = test {
+            buildGradleKts {
+                resolve("/examples/gradle/base/withPlugin.gradle.kts")
+                resolve("/examples/gradle/configuration/generatedSources/generatedJvmSources.gradle.kts")
+            }
+            apiFile(projectName = rootProjectDir.name) {
+                resolve("/examples/classes/GeneratedSources.dump")
+            }
+            // TODO: enable configuration cache back when we start skipping tasks correctly
+            runner(withConfigurationCache = false) {
+                arguments.add(":apiCheck")
+            }
+        }
+        runner.build().apply {
+            assertTaskSuccess(":apiCheck")
+        }
+    }
+}

src/functionalTest/kotlin/kotlinx/validation/test/MultiPlatformSingleJvmKlibTargetTest.kt → src/functionalTest/kotlin/kotlinx/validation/test/MultiPlatformSingleJvmTargetTest.kt

@@ -1,16 +1,17 @@
 /*
- * Copyright 2016-2021 JetBrains s.r.o.
+ * Copyright 2016-2024 JetBrains s.r.o.
  * Use of this source code is governed by the Apache 2.0 License that can be found in the LICENSE.txt file.
  */
 
 package kotlinx.validation.test
 
 import kotlinx.validation.api.*
 import org.assertj.core.api.Assertions.assertThat
+import org.gradle.testkit.runner.TaskOutcome
 import org.junit.Test
 import java.io.File
 
-internal class MultiPlatformSingleJvmKlibTargetTest : BaseKotlinGradleTest() {
+internal class MultiPlatformSingleJvmTargetTest : BaseKotlinGradleTest() {
     private fun BaseKotlinScope.createProjectHierarchyWithPluginOnRoot() {
         settingsGradleKts {
             resolve("/examples/gradle/settings/settings-name-testproject.gradle.kts")
@@ -116,6 +117,45 @@ internal class MultiPlatformSingleJvmKlibTargetTest : BaseKotlinGradleTest() {
         }
     }
 
+    @Test
+    fun testApiDumpPassesForEmptyProject() {
+        val runner = test {
+            buildGradleKts {
+                resolve("/examples/gradle/base/multiplatformWithSingleJvmTarget.gradle.kts")
+            }
+
+            runner {
+                arguments.add(":apiDump")
+            }
+        }
+
+        runner.build().apply {
+            assertTaskSkipped(":jvmApiDump")
+            assertTaskUpToDate(":apiDump")
+        }
+    }
+
+    @Test
+    fun testApiCheckPassesForEmptyProject() {
+        val runner = test {
+            buildGradleKts {
+                resolve("/examples/gradle/base/multiplatformWithSingleJvmTarget.gradle.kts")
+            }
+
+            emptyApiFile(projectName = rootProjectDir.name)
+
+            runner {
+                arguments.add(":apiCheck")
+            }
+        }
+
+        runner.build().apply {
+            assertTaskSkipped(":jvmApiCheck")
+            assertTaskUpToDate(":apiCheck")
+
+        }
+    }
+
     private val jvmApiDump: File get() = rootProjectDir.resolve("$API_DIR/testproject.api")
 
 }

src/functionalTest/resources/examples/classes/GeneratedSources.dump

@@ -0,0 +1,5 @@
+public final class Generated {
+	public fun <init> ()V
+	public final fun helloCreator ()I
+}
+

src/functionalTest/resources/examples/gradle/configuration/generatedSources/generatedJvmSources.gradle.kts

@@ -0,0 +1,21 @@
+abstract class GenerateSourcesTask : org.gradle.api.DefaultTask() {
+    @get:org.gradle.api.tasks.OutputDirectory
+    abstract val outputDirectory: org.gradle.api.file.DirectoryProperty
+
+    @org.gradle.api.tasks.TaskAction
+    fun generate() {
+        outputDirectory.asFile.get().mkdirs()
+        outputDirectory.file("Generated.kt").get().asFile.writeText("""
+                        public class Generated { public fun helloCreator(): Int = 42 }
+                    """.trimIndent())
+    }
+}
+
+val srcgen = project.tasks.register("generateSources", GenerateSourcesTask::class.java)
+srcgen.configure {
+    outputDirectory.set(project.layout.buildDirectory.get().dir("generated").dir("kotlin"))
+}
+
+project.sourceSets.getByName("main") {
+    kotlin.srcDir(srcgen)
+}

src/main/kotlin/BinaryCompatibilityValidatorPlugin.kt

@@ -219,9 +219,7 @@ private fun Project.configureKotlinCompilation(
 
     val apiBuild = task<KotlinApiBuildTask>(targetConfig.apiTaskName("Build")) {
         // Do not enable task for empty umbrella modules
-        isEnabled = apiCheckEnabled(projectName, extension)
-        val hasSourcesPredicate = compilation.hasAnySourcesPredicate()
-        onlyIf { hasSourcesPredicate.get() }
+        isEnabled = apiCheckEnabled(projectName, extension) && compilation.hasAnySources()
         // 'group' is not specified deliberately, so it will be hidden from ./gradlew tasks
         description =
             "Builds Kotlin API for 'main' compilations of $projectName. Complementary task and shouldn't be called manually"