Kapt: verbose output mode

(cherry picked from commit e6067d5)

plugins/annotation-processing/src/org/jetbrains/kotlin/annotation/processing/AnnotationProcessingExtension.kt

@@ -34,13 +34,15 @@ import java.io.File
 import java.net.URLClassLoader
 import java.util.*
 import javax.annotation.processing.Processor
+import javax.tools.Diagnostic
 
 class ClasspathBasedAnnotationProcessingExtension(
         val annotationProcessingClasspath: List<String>,
         generatedSourcesOutputDir: File,
         classesOutputDir: File,
-        javaSourceRoots: List<File>
+        javaSourceRoots: List<File>,
-) : AbstractAnnotationProcessingExtension(generatedSourcesOutputDir, classesOutputDir, javaSourceRoots) {
+        verboseOutput: Boolean
+) : AbstractAnnotationProcessingExtension(generatedSourcesOutputDir, classesOutputDir, javaSourceRoots, verboseOutput) {
     override fun loadAnnotationProcessors(): List<Processor> {
         val classLoader = URLClassLoader(annotationProcessingClasspath.map { File(it).toURI().toURL() }.toTypedArray())
         return ServiceLoader.load(Processor::class.java, classLoader).toList()
@@ -50,9 +52,15 @@ class ClasspathBasedAnnotationProcessingExtension(
 abstract class AbstractAnnotationProcessingExtension(
         val generatedSourcesOutputDir: File,
         val classesOutputDir: File,
-        val javaSourceRoots: List<File>
+        val javaSourceRoots: List<File>,
+        val verboseOutput: Boolean
 ) : AnalysisCompletedHandlerExtension {
     private var annotationProcessingComplete = false
+    private val messager = KotlinMessager()
+
+    private inline fun log(message: () -> String) {
+        if (verboseOutput) messager.printMessage(Diagnostic.Kind.OTHER, "Kapt: " + message())
+    }
     
     override fun analysisCompleted(
             project: Project,
@@ -65,11 +73,18 @@ abstract class AbstractAnnotationProcessingExtension(
         }
 
         val processors = loadAnnotationProcessors()
-        if (processors.isEmpty()) return null
+        if (processors.isEmpty()) {
+            log { "No annotation processors detected, exiting" }
+            return null
+        }
+        
+        log { "Analysing Kotlin files: " + files.map { it.virtualFile.path } }
         
         val analysisContext = AnalysisContext(hashMapOf())
         analysisContext.analyzeFiles(files)
         
+        log { "Analysing Java source roots: $javaSourceRoots" }
+        
         val psiManager = PsiManager.getInstance(project)
         for (javaSourceRoot in javaSourceRoots) {
             javaSourceRoot.walk().filter { it.isFile && it.extension == "java" }.forEach {
@@ -84,19 +99,21 @@ abstract class AbstractAnnotationProcessingExtension(
         }
         
         val options = emptyMap<String, String>()
+        log { "Options: $options" }
         
         val javaPsiFacade = JavaPsiFacade.getInstance(project)
         val projectScope = GlobalSearchScope.projectScope(project)
         
         val filer = KotlinFiler(generatedSourcesOutputDir, classesOutputDir)
-        val messages = KotlinMessager()
         val types = KotlinTypes(javaPsiFacade, PsiManager.getInstance(project), projectScope)
         val elements = KotlinElements(javaPsiFacade, projectScope)
         
-        val processingEnvironment = KotlinProcessingEnvironment(elements, types, messages, options, filer)
+        val processingEnvironment = KotlinProcessingEnvironment(elements, types, messager, options, filer)
         processors.forEach { it.init(processingEnvironment) }
         
-        // Round 1
+        log { "Initialized processors: " + processors.joinToString { it.javaClass.name } }
+        
+        log { "Starting round 1" }
         val round1Environment = KotlinRoundEnvironment(analysisContext)
         for (processor in processors) {
             val supportedAnnotationNames = processor.supportedAnnotationTypes
@@ -107,21 +124,32 @@ abstract class AbstractAnnotationProcessingExtension(
                 false -> processor.supportedAnnotationTypes.filter { it in analysisContext.annotationsMap } 
             }
             
-            if (applicableAnnotationNames.isEmpty()) continue
+            if (applicableAnnotationNames.isEmpty()) {
+                log { "Skipping processor " + processor.javaClass.name + ": no relevant annotations" }
+                continue
+            }
 
             val applicableAnnotations = applicableAnnotationNames
                     .map { javaPsiFacade.findClass(it, projectScope)?.let { JeTypeElement(it) } }
                     .filterNotNullTo(hashSetOf())
             
+            log {
+                val annotationNames = applicableAnnotations.joinToString { it.qualifiedName.toString() }
+                "Processing with " + processor.javaClass.name + " (annotations: " + annotationNames + ")"
+            }
+
             processor.process(applicableAnnotations, round1Environment)
         }
 
-        // Round 2
+        log { "Starting round 2 (final)" }
         val round2Environment = KotlinRoundEnvironment(AnalysisContext(hashMapOf()), isProcessingOver = true)
         for (processor in processors) {
             processor.process(emptySet(), round2Environment)
         }
         
+        fun Int.count(noun: String) = if (this == 1) "$this $noun" else "$this ${noun}s"
+        log { "Annotation processing complete, ${messager.errorCount.count("error")}, ${messager.warningCount.count("warning")}" }
+
         annotationProcessingComplete = true
         return AnalysisResult.RetryWithAdditionalJavaRoots(bindingContext, module, listOf(generatedSourcesOutputDir))
     }

plugins/annotation-processing/src/org/jetbrains/kotlin/annotation/processing/AnnotationProcessingPlugin.kt

@@ -37,6 +37,9 @@ object AnnotationProcessingConfigurationKeys {
     
     val ANNOTATION_PROCESSOR_CLASSPATH: CompilerConfigurationKey<List<String>> =
             CompilerConfigurationKey.create<List<String>>("annotation processor classpath")
+
+    val VERBOSE_MODE: CompilerConfigurationKey<String> = 
+            CompilerConfigurationKey.create<String>("verbose mode")
 }
 
 class AnnotationProcessingCommandLineProcessor : CommandLineProcessor {
@@ -52,12 +55,15 @@ class AnnotationProcessingCommandLineProcessor : CommandLineProcessor {
         val ANNOTATION_PROCESSOR_CLASSPATH_OPTION: CliOption =
                 CliOption("apclasspath", "<classpath>", "Annotation processor classpath", 
                           required = false, allowMultipleOccurrences = true)
+
+        val VERBOSE_MODE_OPTION: CliOption =
+                CliOption("verbose", "true | false", "Enable verbose output", required = false)
     }
 
     override val pluginId: String = ANNOTATION_PROCESSING_COMPILER_PLUGIN_ID
 
     override val pluginOptions: Collection<CliOption> =
-            listOf(GENERATED_OUTPUT_DIR_OPTION, ANNOTATION_PROCESSOR_CLASSPATH_OPTION, CLASS_FILES_OUTPUT_DIR_OPTION)
+            listOf(GENERATED_OUTPUT_DIR_OPTION, ANNOTATION_PROCESSOR_CLASSPATH_OPTION, CLASS_FILES_OUTPUT_DIR_OPTION, VERBOSE_MODE_OPTION)
 
     override fun processOption(option: CliOption, value: String, configuration: CompilerConfiguration) {
         when (option) {
@@ -68,6 +74,7 @@ class AnnotationProcessingCommandLineProcessor : CommandLineProcessor {
             }
             GENERATED_OUTPUT_DIR_OPTION -> configuration.put(AnnotationProcessingConfigurationKeys.GENERATED_OUTPUT_DIR, value)
             CLASS_FILES_OUTPUT_DIR_OPTION -> configuration.put(AnnotationProcessingConfigurationKeys.CLASS_FILES_OUTPUT_DIR, value)
+            VERBOSE_MODE_OPTION -> configuration.put(AnnotationProcessingConfigurationKeys.VERBOSE_MODE, value)
             else -> throw CliOptionProcessingException("Unknown option: ${option.name}")
         }
     }
@@ -88,8 +95,10 @@ class AnnotationProcessingComponentRegistrar : ComponentRegistrar {
         val classesOutputDir = File(configuration.get(AnnotationProcessingConfigurationKeys.CLASS_FILES_OUTPUT_DIR) 
                                ?: configuration[JVMConfigurationKeys.MODULES]!!.first().getOutputDirectory()) 
         
+        val verboseOutput = configuration.get(AnnotationProcessingConfigurationKeys.VERBOSE_MODE) == "true"
+        
         val annotationProcessingExtension = ClasspathBasedAnnotationProcessingExtension(
-                classpath, generatedOutputDirFile, classesOutputDir, javaRoots)
+                classpath, generatedOutputDirFile, classesOutputDir, javaRoots, verboseOutput)
         AnalysisCompletedHandlerExtension.registerExtension(project, annotationProcessingExtension)
     }
 }

plugins/annotation-processing/src/org/jetbrains/kotlin/annotation/processing/impl/KotlinMessager.kt

@@ -24,6 +24,12 @@ import javax.tools.Diagnostic
 import javax.tools.Diagnostic.Kind
 
 class KotlinMessager : Messager {
+    var errorCount: Int = 0
+        private set
+    
+    var warningCount: Int = 0
+        private set
+
     override fun printMessage(kind: Diagnostic.Kind, msg: CharSequence) = printMessage(kind, msg, null)
 
     override fun printMessage(kind: Diagnostic.Kind, msg: CharSequence, e: Element?) = printMessage(kind, msg, e, null)
@@ -34,7 +40,14 @@ class KotlinMessager : Messager {
 
     override fun printMessage(kind: Diagnostic.Kind, msg: CharSequence, e: Element?, a: AnnotationMirror?, v: AnnotationValue?) {
         val output = when (kind) {
-            Kind.ERROR, Kind.WARNING, Kind.MANDATORY_WARNING -> System.err
+            Kind.ERROR -> {
+                errorCount++
+                System.err
+            }
+            Kind.WARNING, Kind.MANDATORY_WARNING -> {
+                warningCount++
+                System.err
+            }
             else -> System.out
         }
         output.println(msg)

plugins/plugins-tests/tests/org/jetbrains/kotlin/annotation/processing/test/processor/AbstractProcessorTest.kt

@@ -40,7 +40,7 @@ import javax.lang.model.element.*
 
 class AnnotationProcessingExtensionForTests(
         val processors: List<Processor>
-) : AbstractAnnotationProcessingExtension(createTempDir(), createTempDir(), listOf()) {
+) : AbstractAnnotationProcessingExtension(createTempDir(), createTempDir(), listOf(), true) {
     override fun loadAnnotationProcessors() = processors
     
     private companion object {