Kapt3: Kapt3 fails on several top-level functions in one package (KT-14991)

plugins/kapt3/src/org/jetbrains/kotlin/kapt3/stubs/ClassFileToSourceStubConverter.kt

@@ -23,10 +23,7 @@ import com.sun.tools.javac.tree.JCTree
 import com.sun.tools.javac.tree.JCTree.*
 import com.sun.tools.javac.tree.TreeMaker
 import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper
-import org.jetbrains.kotlin.descriptors.CallableDescriptor
-import org.jetbrains.kotlin.descriptors.ClassDescriptor
-import org.jetbrains.kotlin.descriptors.ClassKind
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.kapt3.*
 import org.jetbrains.kotlin.kapt3.javac.KaptTreeMaker
 import org.jetbrains.kotlin.kapt3.javac.KaptJavaFileObject
@@ -151,7 +148,14 @@ class ClassFileToSourceStubConverter(
             return null
         }
 
-        val simpleName = treeMaker.name(if (isDefaultImpls) "DefaultImpls" else descriptor.name.asString())
+        val simpleName = when (descriptor) {
+            is PackageFragmentDescriptor -> {
+                val className = clazz.name.drop(packageFqName.length + 1)
+                if (className.isEmpty()) throw IllegalStateException("Invalid package facade class name: ${clazz.name}")
+                className
+            }
+            else -> if (isDefaultImpls) "DefaultImpls" else descriptor.name.asString()
+        }
 
         val interfaces = mapJList(clazz.interfaces) {
             if (isAnnotation && it == "java/lang/annotation/Annotation") return@mapJList null
@@ -180,7 +184,7 @@ class ClassFileToSourceStubConverter(
 
         return treeMaker.ClassDef(
                 modifiers,
-                simpleName,
+                treeMaker.name(simpleName),
                 genericType.typeParameters,
                 if (hasSuperClass) genericType.superClass else null,
                 genericType.interfaces,

plugins/kapt3/test/org/jetbrains/kotlin/kapt3/test/ClassFileToSourceStubConverterTestGenerated.java

@@ -72,6 +72,12 @@ public class ClassFileToSourceStubConverterTestGenerated extends AbstractClassFi
         doTest(fileName);
     }
 
+    @TestMetadata("fileFacadeJvmName.kt")
+    public void testFileFacadeJvmName() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("plugins/kapt3/testData/converter/fileFacadeJvmName.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("functions.kt")
     public void testFunctions() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("plugins/kapt3/testData/converter/functions.kt");
@@ -114,6 +120,12 @@ public class ClassFileToSourceStubConverterTestGenerated extends AbstractClassFi
         doTest(fileName);
     }
 
+    @TestMetadata("multifileClass.kt")
+    public void testMultifileClass() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("plugins/kapt3/testData/converter/multifileClass.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("nestedClasses.kt")
     public void testNestedClasses() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("plugins/kapt3/testData/converter/nestedClasses.kt");
@@ -132,6 +144,12 @@ public class ClassFileToSourceStubConverterTestGenerated extends AbstractClassFi
         doTest(fileName);
     }
 
+    @TestMetadata("severalPackageParts.kt")
+    public void testSeveralPackageParts() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("plugins/kapt3/testData/converter/severalPackageParts.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("strangeNames.kt")
     public void testStrangeNames() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("plugins/kapt3/testData/converter/strangeNames.kt");

plugins/kapt3/testData/converter/annotations2.txt

@@ -60,9 +60,9 @@ public enum Enum {
 
 package test;
 
-public final class test {
+public final class AnnotationsTest {
 
-    public test() {
+    public AnnotationsTest() {
         super();
     }
 

plugins/kapt3/testData/converter/fileFacadeJvmName.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+@file:JvmName("FacadeName")
+package a.b.c
+
+fun foo() {}
+
+val bar = 3

plugins/kapt3/testData/converter/fileFacadeJvmName.txt

@@ -0,0 +1,16 @@
+package a.b.c;
+
+public final class FacadeName {
+
+    public FacadeName() {
+        super();
+    }
+    private static final int bar = 3;
+
+    public static final void foo() {
+    }
+
+    public static final int getBar() {
+        return 0;
+    }
+}

plugins/kapt3/testData/converter/multifileClass.kt

@@ -0,0 +1,22 @@
+// WITH_RUNTIME
+
+// FILE: a.kt
+@file:JvmMultifileClass
+@file:JvmName("M1")
+package test
+
+fun foo() {}
+
+// FILE: b.kt
+@file:JvmMultifileClass
+@file:JvmName("M1")
+package test
+
+fun bar() {}
+
+// FILE: c.kt
+@file:JvmMultifileClass
+@file:JvmName("M2")
+package test
+
+fun baz() {}

plugins/kapt3/testData/converter/multifileClass.txt

@@ -0,0 +1,28 @@
+package test;
+
+public final class M1 {
+
+    public M1() {
+        super();
+    }
+
+    public static final void bar() {
+    }
+
+    public static final void foo() {
+    }
+}
+
+////////////////////
+
+package test;
+
+public final class M2 {
+
+    public M2() {
+        super();
+    }
+
+    public static final void baz() {
+    }
+}

plugins/kapt3/testData/converter/severalPackageParts.kt

@@ -0,0 +1,9 @@
+// FILE: a.kt
+package test
+
+fun foo() {}
+
+// FILE: b.kt
+package test
+
+fun bar() {}

plugins/kapt3/testData/converter/severalPackageParts.txt

@@ -0,0 +1,25 @@
+package test;
+
+public final class AKt {
+
+    public AKt() {
+        super();
+    }
+
+    public static final void foo() {
+    }
+}
+
+////////////////////
+
+package test;
+
+public final class BKt {
+
+    public BKt() {
+        super();
+    }
+
+    public static final void bar() {
+    }
+}

plugins/kapt3/testData/converter/topLevel.txt

@@ -9,9 +9,9 @@ public abstract @interface Anno {
 
 package test.another;
 
-public final class another {
+public final class TopLevelKt {
 
-    public another() {
+    public TopLevelKt() {
         super();
     }
     private static final int topLevelProperty = 2;