[KAPT4] KT-51982 Implement Kapt4AnalysisHandlerExtension, add KAPT CLI and Gradle IT

Co-authored-by: Alexander Udalov <Alexander.Udalov@jetbrains.com>

plugins/kapt3/kapt3-cli/testData/integration/multipass/Test.kt

@@ -0,0 +1,11 @@
+package test
+
+import apt.Annotation1
+import generated.Test123
+
+@Annotation1
+class Test
+
+fun main() {
+    println("Generated class: " + Test123::class.java.name)
+}

plugins/kapt3/kapt3-cli/testData/integration/multipass/ap/processors.kt

@@ -0,0 +1,68 @@
+package apt
+
+import javax.annotation.processing.*
+import javax.lang.model.SourceVersion
+import javax.lang.model.element.TypeElement
+import javax.tools.Diagnostic
+
+
+annotation class Annotation1
+annotation class Annotation2
+annotation class Annotation3
+
+@SupportedSourceVersion(SourceVersion.RELEASE_8)
+@SupportedAnnotationTypes("apt.Annotation1")
+class AnnotationProcessor1 : AbstractProcessor() {
+    override fun process(annotations: Set<TypeElement>, roundEnv: RoundEnvironment): Boolean {
+        val elements = roundEnv.getElementsAnnotatedWith(Annotation1::class.java)
+        for (element in elements) {
+            val generatedSimpleName = "${element.simpleName}1"
+
+            val file = processingEnv.filer.createSourceFile("generated.$generatedSimpleName")
+
+            file.openWriter().use {
+                it.write("package generated;\n@apt.Annotation2\npublic class $generatedSimpleName {}")
+            }
+        }
+
+        return true
+    }
+}
+
+@SupportedSourceVersion(SourceVersion.RELEASE_8)
+@SupportedAnnotationTypes("apt.Annotation2")
+class AnnotationProcessor2 : AbstractProcessor() {
+    override fun process(annotations: Set<TypeElement>, roundEnv: RoundEnvironment): Boolean {
+        val elements = roundEnv.getElementsAnnotatedWith(Annotation2::class.java)
+        for (element in elements) {
+            val generatedSimpleName = "${element.simpleName}2"
+
+            val file = processingEnv.filer.createSourceFile("generated.$generatedSimpleName")
+
+            file.openWriter().use {
+                it.write("package generated;\n@apt.Annotation3\npublic class $generatedSimpleName {}")
+            }
+        }
+
+        return true
+    }
+}
+
+@SupportedSourceVersion(SourceVersion.RELEASE_8)
+@SupportedAnnotationTypes("apt.Annotation3")
+class AnnotationProcessor3 : AbstractProcessor() {
+    override fun process(annotations: Set<TypeElement>, roundEnv: RoundEnvironment): Boolean {
+        val elements = roundEnv.getElementsAnnotatedWith(Annotation3::class.java)
+        for (element in elements) {
+            val generatedSimpleName = "${element.simpleName}3"
+
+            val file = processingEnv.filer.createSourceFile("generated.$generatedSimpleName")
+
+            file.openWriter().use {
+                it.write("package generated;\npublic class $generatedSimpleName {}")
+            }
+        }
+
+        return true
+    }
+}

plugins/kapt3/kapt3-cli/testData/integration/multipass/build.txt

@@ -0,0 +1,38 @@
+# mkdir
+output/ap
+output/stubs
+output/classes
+output/javaClasses
+output/sources
+
+# kotlinc
+-cp %KOTLIN_STDLIB%
+-d output/ap
+ap/processors.kt
+
+# kapt
+-Kapt-stubs=output/stubs
+-Kapt-classes=output/classes
+-Kapt-sources=output/sources
+-Kapt-classpath=output/ap
+-Kapt-processors=apt.AnnotationProcessor3
+-Kapt-processors=apt.AnnotationProcessor2
+-Kapt-processors=apt.AnnotationProcessor1
+-d output/classes
+-cp output/ap:%KOTLIN_STDLIB%
+Test.kt
+
+# javac
+-cp output/ap
+-d output/javaClasses
+-proc:none
+output/sources/generated/Test1.java
+output/sources/generated/Test12.java
+output/sources/generated/Test123.java
+
+# java
+-cp output/classes:output/javaClasses:output/ap:%KOTLIN_STDLIB%
+test.TestKt
+
+# after
+Generated class: generated.Test123