Downgrade to Kotlin 2.1.20

Author: ting-yuan

gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspAATask.kt

@@ -38,7 +38,6 @@ import org.gradle.work.NormalizeLineEndings
 import org.gradle.workers.WorkAction
 import org.gradle.workers.WorkParameters
 import org.gradle.workers.WorkerExecutor
-import org.jetbrains.kotlin.gradle.dsl.JvmDefaultMode
 import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompilerOptions
 import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
 import org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType
@@ -277,20 +276,11 @@ abstract class KspAATask @Inject constructor(
                             cfg.jdkVersion.value(it.toInt())
                         }
 
-                        val oldJvmDefaultMode = compilerOptions.freeCompilerArgs
+                        val jvmDefaultMode = compilerOptions.freeCompilerArgs
                             .map { args -> args.filter { it.startsWith("-Xjvm-default=") } }
-                            .map { it.lastOrNull()?.substringAfter("=") ?: "undefined" }
-
-                        cfg.jvmDefaultMode.value(
-                            project.provider {
-                                when (oldJvmDefaultMode.get()) {
-                                    "all" -> "no-compatibility"
-                                    "all-compatibility" -> "enable"
-                                    "disable" -> "disable"
-                                    else -> compilerOptions.jvmDefault.getOrElse(JvmDefaultMode.ENABLE).compilerArgument
-                                }
-                            }
-                        )
+                            .map { it.lastOrNull()?.substringAfter("=") ?: "disable" }
+
+                        cfg.jvmDefaultMode.value(jvmDefaultMode)
 
                         cfg.jvmTarget.value(compilerOptions.jvmTarget.map { it.target })
 

gradle.properties

@@ -1,9 +1,9 @@
 # Copied from kotlinc
 org.gradle.jvmargs=-Duser.country=US -Dkotlin.daemon.jvm.options=-Xmx4096m -Dfile.encoding=UTF-8
 
-kotlinBaseVersion=2.2.0-dev-7255
+kotlinBaseVersion=2.1.20
 agpBaseVersion=8.10.0-alpha03
-intellijVersion=241.19416.19
+intellijVersion=233.13135.128
 junitVersion=4.13.1
 junit5Version=5.8.2
 junitPlatformVersion=1.8.2
@@ -25,4 +25,4 @@ kotlin.jvm.target.validation.mode=warning
 
 # Build or runtime dependencies of this project
 buildKotlinVersion=2.0.20
-buildKspVersion=2.0.20-1.0.25
+buildKspVersion=2.0.20-1.0.25

integration-tests/src/test/kotlin/com/google/devtools/ksp/test/PlaygroundIT.kt

@@ -310,7 +310,7 @@ class PlaygroundIT(val useKSP2: Boolean) {
         val gradleRunner = GradleRunner.create().withProjectDir(project.root)
         gradleRunner.buildAndCheck("clean", "build") { result ->
             Assert.assertTrue(result.output.contains("platform: JVM"))
-            Assert.assertTrue(result.output.contains("jvm default mode: no-compatibility"))
+            Assert.assertTrue(result.output.contains("jvm default mode: all"))
         }
         project.restore(buildFile.path)
     }