Maven Import: Support compiler arguments specified directly in <args>

#KT-21592 Fixed

idea/idea-maven/src/org/jetbrains/kotlin/idea/maven/KotlinMavenImporter.kt

@@ -28,6 +28,7 @@ import com.intellij.openapi.roots.impl.libraries.LibraryEx
 import com.intellij.openapi.roots.libraries.Library
 import com.intellij.openapi.util.AsyncResult
 import org.jdom.Element
+import org.jdom.Text
 import org.jetbrains.idea.maven.importing.MavenImporter
 import org.jetbrains.idea.maven.importing.MavenRootModelAdapter
 import org.jetbrains.idea.maven.model.MavenPlugin
@@ -39,15 +40,14 @@ import org.jetbrains.kotlin.cli.common.arguments.K2JVMCompilerArguments
 import org.jetbrains.kotlin.cli.common.arguments.K2MetadataCompilerArguments
 import org.jetbrains.kotlin.cli.common.arguments.parseCommandLineArguments
 import org.jetbrains.kotlin.compilerRunner.ArgumentUtils
-import org.jetbrains.kotlin.config.JvmTarget
-import org.jetbrains.kotlin.config.LanguageFeature
-import org.jetbrains.kotlin.config.LanguageVersion
-import org.jetbrains.kotlin.config.TargetPlatformKind
+import org.jetbrains.kotlin.config.*
 import org.jetbrains.kotlin.extensions.ProjectExtensionDescriptor
 import org.jetbrains.kotlin.idea.facet.*
 import org.jetbrains.kotlin.idea.framework.detectLibraryKind
 import org.jetbrains.kotlin.idea.framework.libraryKind
 import org.jetbrains.kotlin.idea.maven.configuration.KotlinMavenConfigurator
+import org.jetbrains.kotlin.utils.SmartList
+import org.jetbrains.kotlin.utils.addIfNotNull
 import java.io.File
 import java.util.*
 
@@ -160,7 +160,23 @@ class KotlinMavenImporter : MavenImporter(KOTLIN_PLUGIN_GROUP_ID, KOTLIN_PLUGIN_
             }
         }
 
-        val additionalArgs = configuration?.getChild("args")?.getChildren("arg")?.mapNotNull { it.text }.orEmpty()
+        val additionalArgs = SmartList<String>().apply {
+            val argsElement = configuration?.getChild("args")
+
+            argsElement?.content?.forEach { argElement ->
+                when (argElement) {
+                    is Text -> {
+                        argElement.text?.let { addAll(splitArgumentString(it)) }
+                    }
+                    is Element -> {
+                        if (argElement.name == "arg") {
+                            addIfNotNull(argElement.text)
+                        }
+                    }
+                }
+            }
+            argsElement?.getChildren("arg")?.mapNotNullTo(this) { it.text }
+        }
         parseCommandLineArguments(additionalArgs, arguments)
 
         return ArgumentUtils.convertArgumentsToStringList(arguments)

idea/idea-maven/test/org/jetbrains/kotlin/idea/maven/KotlinMavenImporterTest.kt

@@ -728,6 +728,60 @@ class KotlinMavenImporterTest : MavenImportingTestCase() {
         }
     }
 
+    fun testArgsInFacetInSingleElement() {
+        createProjectSubDirs("src/main/kotlin", "src/main/kotlin.jvm", "src/test/kotlin", "src/test/kotlin.jvm")
+
+        importProject("""
+        <groupId>test</groupId>
+        <artifactId>project</artifactId>
+        <version>1.0.0</version>
+
+        <dependencies>
+            <dependency>
+                <groupId>org.jetbrains.kotlin</groupId>
+                <artifactId>kotlin-stdlib</artifactId>
+                <version>$kotlinVersion</version>
+            </dependency>
+        </dependencies>
+
+        <build>
+            <sourceDirectory>src/main/kotlin</sourceDirectory>
+
+            <plugins>
+                <plugin>
+                    <groupId>org.jetbrains.kotlin</groupId>
+                    <artifactId>kotlin-maven-plugin</artifactId>
+
+                    <executions>
+                        <execution>
+                            <id>compile</id>
+                            <phase>compile</phase>
+                            <goals>
+                                <goal>compile</goal>
+                            </goals>
+                        </execution>
+                    </executions>
+                    <configuration>
+                        <args>
+                            -jvm-target 1.8 -Xcoroutines=enable -classpath "c:\program files\jdk1.8"
+                        </args>
+                    </configuration>
+                </plugin>
+            </plugins>
+        </build>
+        """)
+
+        assertModules("project")
+        assertImporterStatePresent()
+
+        with (facetSettings) {
+            Assert.assertEquals("JVM 1.8", targetPlatformKind!!.description)
+            Assert.assertEquals("1.8", (compilerArguments as K2JVMCompilerArguments).jvmTarget)
+            Assert.assertEquals(LanguageFeature.State.ENABLED, coroutineSupport)
+            Assert.assertEquals("c:/program files/jdk1.8", (compilerArguments as K2JVMCompilerArguments).classpath)
+        }
+    }
+
     fun testJvmDetectionByGoalWithJvmStdlib() {
         createProjectSubDirs("src/main/kotlin", "src/main/kotlin.jvm", "src/test/kotlin", "src/test/kotlin.jvm")