Minor. Move serialization annotation fq-names to IDE light-classes

They are a kind of a hack applied in light-classes and it'd be nice
to prevent them being used in irrelevant contexts

kotlin-serialization-compiler module should not depend on idea,
thus we can't use annotations directly there.

So, we copy-paste them and add a test on names consistency

build.gradle.kts

@@ -511,7 +511,8 @@ tasks {
                   ":kotlin-noarg-compiler-plugin:test",
                   ":kotlin-sam-with-receiver-compiler-plugin:test",
                   ":plugins:uast-kotlin:test",
-                  ":kotlin-annotation-processing-gradle:test")
+                  ":kotlin-annotation-processing-gradle:test",
+                  ":kotlinx-serialization-ide-plugin:test")
     }
 
 

compiler/frontend/src/org/jetbrains/kotlin/resolve/AnnotationUtil.kt

@@ -42,6 +42,3 @@ fun AnnotationDescriptor.argumentValue(parameterName: String): ConstantValue<*>?
     DeprecationLevel.ERROR
 )
 val JVM_FIELD_ANNOTATION_FQ_NAME = FqName("kotlin.jvm.JvmField")
-
-val KOTLINX_SERIALIZABLE_FQ_NAME = FqName("kotlinx.serialization.Serializable")
-val KOTLINX_SERIALIZER_FQ_NAME = FqName("kotlinx.serialization.Serializer")

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/lightClasses/IDELightClassContexts.kt

@@ -36,6 +36,8 @@ import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
 import org.jetbrains.kotlin.frontend.di.configureModule
 import org.jetbrains.kotlin.idea.caches.lightClasses.IDELightClassConstructionContext.Mode.EXACT
 import org.jetbrains.kotlin.idea.caches.lightClasses.IDELightClassConstructionContext.Mode.LIGHT
+import org.jetbrains.kotlin.idea.caches.lightClasses.annotations.KOTLINX_SERIALIZABLE_FQ_NAME
+import org.jetbrains.kotlin.idea.caches.lightClasses.annotations.KOTLINX_SERIALIZER_FQ_NAME
 import org.jetbrains.kotlin.idea.caches.project.getModuleInfo
 import org.jetbrains.kotlin.idea.caches.resolve.getResolutionFacade
 import org.jetbrains.kotlin.idea.compiler.IDELanguageSettingsProvider
@@ -52,8 +54,6 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.getElementTextWithContext
 import org.jetbrains.kotlin.resolve.*
-import org.jetbrains.kotlin.resolve.annotations.KOTLINX_SERIALIZABLE_FQ_NAME
-import org.jetbrains.kotlin.resolve.annotations.KOTLINX_SERIALIZER_FQ_NAME
 import org.jetbrains.kotlin.resolve.calls.CallResolver
 import org.jetbrains.kotlin.resolve.calls.context.BasicCallResolutionContext
 import org.jetbrains.kotlin.resolve.calls.context.CheckArgumentTypesMode

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/lightClasses/annotations.kt

@@ -0,0 +1,11 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.caches.lightClasses.annotations
+
+import org.jetbrains.kotlin.name.FqName
+
+val KOTLINX_SERIALIZABLE_FQ_NAME = FqName("kotlinx.serialization.Serializable")
+val KOTLINX_SERIALIZER_FQ_NAME = FqName("kotlinx.serialization.Serializer")

plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/resolve/NamingConventions.kt

@@ -1,10 +1,7 @@
 package org.jetbrains.kotlinx.serialization.compiler.resolve
 
-import org.jetbrains.kotlin.load.java.JvmAnnotationNames
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.resolve.annotations.KOTLINX_SERIALIZABLE_FQ_NAME
-import org.jetbrains.kotlin.resolve.annotations.KOTLINX_SERIALIZER_FQ_NAME
 
 object SerializationPackages {
     internal val packageFqName = FqName("kotlinx.serialization")
@@ -13,8 +10,12 @@ object SerializationPackages {
 }
 
 object SerializationAnnotations {
-    internal val serializableAnnotationFqName = KOTLINX_SERIALIZABLE_FQ_NAME
-    internal val serializerAnnotationFqName = KOTLINX_SERIALIZER_FQ_NAME
+    // When changing names for these annotations, please change
+    // org.jetbrains.kotlin.idea.caches.lightClasses.annotations.KOTLINX_SERIALIZABLE_FQ_NAME and
+    // org.jetbrains.kotlin.idea.caches.lightClasses.annotations.KOTLINX_SERIALIZER_FQ_NAME accordingly.
+    // Otherwise, there it might lead to exceptions from light classes when building them for serializer/serializable classes
+    val serializableAnnotationFqName = FqName("kotlinx.serialization.Serializable")
+    val serializerAnnotationFqName = FqName("kotlinx.serialization.Serializer")
     internal val serialNameAnnotationFqName = FqName("kotlinx.serialization.SerialName")
     internal val serialOptionalFqName = FqName("kotlinx.serialization.Optional")
     internal val serialTransientFqName = FqName("kotlinx.serialization.Transient")

plugins/kotlin-serialization/kotlin-serialization-ide/build.gradle.kts

@@ -20,7 +20,7 @@ dependencies {
 
 sourceSets {
     "main" { projectDefault() }
-    "test" {}
+    "test" { projectDefault() }
 }
 
 runtimeJar()

plugins/kotlin-serialization/kotlin-serialization-ide/test/org.jetbrains.kotlinx.serialization.idea/AnnotationNamesConsistencyTest.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+package org.jetbrains.kotlinx.serialization.idea
+
+import junit.framework.TestCase
+import org.jetbrains.kotlin.idea.caches.lightClasses.annotations.KOTLINX_SERIALIZABLE_FQ_NAME
+import org.jetbrains.kotlin.idea.caches.lightClasses.annotations.KOTLINX_SERIALIZER_FQ_NAME
+import org.jetbrains.kotlinx.serialization.compiler.resolve.SerializationAnnotations
+
+
+class AnnotationNamesConsistencyTest : TestCase() {
+    fun testConsistency() {
+        assertEquals(KOTLINX_SERIALIZABLE_FQ_NAME, SerializationAnnotations.serializableAnnotationFqName)
+        assertEquals(KOTLINX_SERIALIZER_FQ_NAME, SerializationAnnotations.serializerAnnotationFqName)
+    }
+}