Support default module name for withKotlin ant task

ant/src/org/jetbrains/kotlin/ant/Kotlin2JvmTask.kt

@@ -70,12 +70,9 @@ public class Kotlin2JvmTask : KotlinCompilerBaseTask() {
             args.add(it.list().join(pathSeparator))
         }
 
+
         if (moduleName == null) {
-            if (owningTarget != null) {
-                moduleName = owningTarget.name
-            } else if (getProject() != null) {
-                moduleName = getProject().name
-            }
+            moduleName = defaultModuleName
         }
 
         moduleName?.let {

ant/src/org/jetbrains/kotlin/ant/KotlinAntTaskUtil.kt

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.ant
 
 import org.apache.tools.ant.AntClassLoader
+import org.apache.tools.ant.Task
 import org.jetbrains.kotlin.preloading.ClassPreloadingUtils
 import org.jetbrains.kotlin.preloading.Preloader
 import java.io.File
@@ -63,4 +64,8 @@ object KotlinAntTaskUtil {
 
         return classLoader
     }
+
 }
+
+public val Task.defaultModuleName: String?
+    get() = owningTarget?.name ?: project?.name

ant/src/org/jetbrains/kotlin/ant/KotlinCompilerAdapter.java

@@ -92,6 +92,9 @@ public class KotlinCompilerAdapter extends Javac13 {
 
         kotlinc.setExternalAnnotations(externalAnnotations);
 
+        if (moduleName == null) {
+            moduleName = AntPackage.getDefaultModuleName(javac);
+        }
         kotlinc.setModuleName(moduleName);
 
         kotlinc.getAdditionalArguments().addAll(additionalArguments);

build.xml

@@ -563,7 +563,7 @@
     <target name="kotlinr">
         <cleandir dir="${output}/classes/kotlinr"/>
 
-        <kotlinc output="${output}/classes/kotlinr">
+        <kotlinc output="${output}/classes/kotlinr" modulename="kotlin-rmi">
             <src>
                 <pathelement path="compiler/rmi/kotlinr/src"/>
             </src>
@@ -583,7 +583,7 @@
     <target name="android-compiler-plugin">
         <cleandir dir="${output}/classes/android-compiler-plugin"/>
 
-        <kotlinc output="${output}/classes/android-compiler-plugin">
+        <kotlinc output="${output}/classes/android-compiler-plugin" modulename="kotlin-android-compiler-plugin">
             <src>
                 <pathelement path="plugins/android-compiler-plugin/src"/>
             </src>
@@ -606,7 +606,7 @@
         <cleandir dir="${output}/classes/ant"/>
         <javac2 destdir="${output}/classes/ant" debug="true" debuglevel="lines,vars,source" includeAntRuntime="false"
                 source="${java.target}" target="${java.target}">
-            <withKotlin externalannotations="${external.annotations.path}"/>
+            <withKotlin externalannotations="${external.annotations.path}" modulename="kotlin-ant-tools"/>
             <skip pattern="kotlin/jvm/internal/.*"/>
             <src>
                 <dirset dir="${basedir}/ant">
@@ -911,7 +911,7 @@
 
         <javac2 destdir="${output}/classes/idea-analysis" debug="true" debuglevel="lines,vars,source" includeAntRuntime="false"
                 source="${java.target}" target="${java.target}">
-            <withKotlin externalannotations="${external.annotations.path}"/>
+            <withKotlin externalannotations="${external.annotations.path}" modulename="kotlin-for-upsource"/>
             <skip pattern="kotlin/jvm/internal/.*"/>
             <src>
                 <dirset dir="${basedir}/idea/ide-common" includes="src"/>

compiler/testData/integration/ant/jvm/moduleNameWithKotlin/build.log.expected

@@ -0,0 +1,15 @@
+OUT:
+Buildfile: [TestData]/build.xml
+
+build:
+    [mkdir] Created dir: [Temp]/classes
+    [javac] Compiling 1 source file to [Temp]/classes
+    [javac] Compiling [[TestData]] => [[Temp]/classes]
+    [javac] Running javac...
+      [jar] Building jar: [Temp]/hello.jar
+     [java] Module info 'META-INF/build.kotlin_module' exists
+
+BUILD SUCCESSFUL
+Total time: [time]
+
+Return code: 0

compiler/testData/integration/ant/jvm/moduleNameWithKotlin/build.xml

@@ -0,0 +1,20 @@
+<project name="Ant Task Test" default="build">
+    <taskdef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>
+
+    <target name="build">
+        <mkdir dir="${temp}/classes"/>
+        <javac srcdir="${test.data}" destdir="${temp}/classes" includeantruntime="false">
+            <withKotlin/>
+        </javac>
+        <jar destfile="${temp}/hello.jar">
+            <fileset dir="${temp}/classes"/>
+        </jar>
+
+        <java classname="hello.HelloPackage" fork="true">
+            <classpath>
+                <pathelement location="${temp}/hello.jar"/>
+                <pathelement location="${kotlin.runtime.jar}"/>
+            </classpath>
+        </java>
+    </target>
+</project>

compiler/testData/integration/ant/jvm/moduleNameWithKotlin/hello.kt

@@ -0,0 +1,11 @@
+package hello
+
+fun main(args: Array<String>) {
+    val systemClassLoader = ClassLoader.getSystemClassLoader()
+    val moduleFile = "META-INF/build.kotlin_module"
+    val resourceAsStream = systemClassLoader.getResourceAsStream(moduleFile)
+
+    if (resourceAsStream != null) {
+        println("Module info '$moduleFile' exists")
+    }
+}

compiler/tests/org/jetbrains/kotlin/integration/AntTaskTestGenerated.java

@@ -77,6 +77,12 @@ public class AntTaskTestGenerated extends AbstractAntTaskTest {
         doTest(fileName);
     }
 
+    @TestMetadata("moduleNameWithKotlin")
+    public void testModuleNameWithKotlin() throws Exception {
+        String fileName = JetTestUtils.navigationMetadata("compiler/testData/integration/ant/jvm/moduleNameWithKotlin/");
+        doTest(fileName);
+    }
+
     @TestMetadata("noStdlibForJavac")
     public void testNoStdlibForJavac() throws Exception {
         String fileName = JetTestUtils.navigationMetadata("compiler/testData/integration/ant/jvm/noStdlibForJavac/");