Maven: metadata mojo initial implementation

libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/KotlinCompileMojoBase.java

@@ -72,6 +72,9 @@ public abstract class KotlinCompileMojoBase<A extends CommonCompilerArguments> e
     @Parameter
     private List<String> pluginOptions;
 
+    @Parameter
+    private boolean multiPlatform = false;
+
     private List<String> getAppliedCompilerPlugins() {
         return (compilerPlugins == null) ? Collections.<String>emptyList() : compilerPlugins;
     }
@@ -359,6 +362,7 @@ public abstract class KotlinCompileMojoBase<A extends CommonCompilerArguments> e
         arguments.suppressWarnings = nowarn;
         arguments.languageVersion = languageVersion;
         arguments.apiVersion = apiVersion;
+        arguments.multiPlatform = multiPlatform;
 
         getLog().info("Compiling Kotlin sources from " + sources);
 

libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/MetadataMojo.java

@@ -0,0 +1,52 @@
+package org.jetbrains.kotlin.maven;
+
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugins.annotations.LifecyclePhase;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.plugins.annotations.ResolutionScope;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.kotlin.cli.common.CLICompiler;
+import org.jetbrains.kotlin.cli.common.arguments.K2MetadataCompilerArguments;
+import org.jetbrains.kotlin.cli.metadata.K2MetadataCompiler;
+
+import java.io.File;
+import java.util.List;
+
+import static com.intellij.openapi.util.text.StringUtil.join;
+import static org.jetbrains.kotlin.maven.Util.filterClassPath;
+
+@Mojo(name = "metadata", defaultPhase = LifecyclePhase.PROCESS_SOURCES, requiresDependencyResolution = ResolutionScope.COMPILE)
+public class MetadataMojo extends KotlinCompileMojoBase<K2MetadataCompilerArguments> {
+    @Parameter(defaultValue = "${project.compileClasspathElements}", required = true, readonly = true)
+    public List<String> classpath;
+
+    @NotNull
+    @Override
+    protected CLICompiler<K2MetadataCompilerArguments> createCompiler() {
+        return new K2MetadataCompiler();
+    }
+
+    @NotNull
+    @Override
+    protected K2MetadataCompilerArguments createCompilerArguments() {
+        return new K2MetadataCompilerArguments();
+    }
+
+    @Override
+    protected void configureSpecificCompilerArguments(@NotNull K2MetadataCompilerArguments arguments) throws MojoExecutionException {
+        arguments.destination = output;
+        if (!arguments.multiPlatform) {
+            getLog().info("multiPlatform forced for metadata generation");
+            arguments.multiPlatform = true;
+        }
+
+        List<String> classpathList = filterClassPath(project.getBasedir(), classpath);
+
+        if (!classpathList.isEmpty()) {
+            String classPathString = join(classpathList, File.pathSeparator);
+            getLog().debug("Classpath: " + classPathString);
+            arguments.classpath = classPathString;
+        }
+    }
+}