Added the ability to set the base name, version, classifier and build destination for multi-version configuration and improved support for Kotlin DSL

src/main/java/io/github/pacifistmc/forgix/plugin/configurations/ForgixConfiguration.java

@@ -278,7 +278,7 @@ public RegularFileProperty getInputJar() {
     // Multiversion stuff
 
     public void multiversion(Action<? super MultiversionConfiguration> action) {
-        Action<? super Project> afterEvaluateAction = _ -> action.execute(multiversionConfiguration = new MultiversionConfiguration(getObjects()));
+        Action<? super Project> afterEvaluateAction = _ -> action.execute(multiversionConfiguration = new MultiversionConfiguration(getObjects(), rootProject));
         if (rootProject.getState().getExecuted()) {
             afterEvaluateAction.execute(rootProject);
             return;
@@ -287,15 +287,42 @@ public void multiversion(Action<? super MultiversionConfiguration> action) {
     }
 
     public static class MultiversionConfiguration {
-        @SuppressWarnings("FieldMayBeFinal") // We use afterEvaluate so this can't be final
-        private FileCollection inputJars;
+        private final Project rootProject;
+        private final Property<String> archiveBaseName;
+        private final Property<String> archiveClassifier;
+        private final Property<String> archiveVersion;
+        private final Property<Directory> destinationDirectory;
+
+		@SuppressWarnings("FieldMayBeFinal") // We use afterEvaluate so this can't be final
+        private Property<FileCollection> inputJars;
 
         @Inject
-        public MultiversionConfiguration(ObjectFactory objects) {
-            this.inputJars = objects.fileCollection();
+        public MultiversionConfiguration(ObjectFactory objects, Project rootProject) {
+            this.rootProject = rootProject;
+            this.inputJars = objects.property(FileCollection.class);
+            this.archiveBaseName = objects.property(String.class);
+            this.archiveClassifier = objects.property(String.class);
+            this.archiveVersion = objects.property(String.class);
+            this.destinationDirectory = objects.directoryProperty();
+		}
+
+        public Property<String> getArchiveBaseName() {
+            return archiveBaseName.convention(rootProject.getName());
+        }
+
+        public Property<String> getArchiveClassifier() {
+            return archiveClassifier.convention("multi");
+        }
+
+        public Property<String> getArchiveVersion() {
+            return archiveVersion.convention(rootProject.getVersion().toString());
+        }
+
+        public Property<Directory> getDestinationDirectory() {
+            return destinationDirectory.convention(rootProject.getLayout().getBuildDirectory().dir("forgix/multiversion"));
         }
 
-        public FileCollection getInputJars() {
+        public Property<FileCollection> getInputJars() {
             return inputJars;
         }
     }

src/main/java/io/github/pacifistmc/forgix/plugin/tasks/MergeVersionsTask.java

@@ -20,14 +20,18 @@ public abstract class MergeVersionsTask extends Jar {
 
     @Inject
     public MergeVersionsTask() {
-        // Configure archive properties
-        archiveBaseName.set(settings.archiveBaseName);
-        archiveClassifier.set(settings.archiveClassifier);
-        archiveVersion.set(project.provider(() -> "${settings.archiveVersion.get()}-multi"));
-        destinationDirectory.set(settings.destinationDirectory.get().dir("multiversion"));
-
-        // Set up input files
-        if (settings.multiversionConfiguration != null) inputJarFiles.setFrom(settings.multiversionConfiguration.inputJars);
+        var multiversion = settings.multiversionConfiguration;
+
+        if (multiversion != null) {
+            // Configure archive properties
+            archiveBaseName.set(multiversion.archiveBaseName);
+            archiveClassifier.set(multiversion.archiveClassifier);
+            archiveVersion.set(multiversion.archiveVersion);
+            destinationDirectory.set(multiversion.getDestinationDirectory());
+
+            // Set up input files
+            inputJarFiles.setFrom(multiversion.getInputJars());
+        }
     }
 
     void mergeVersions() {
@@ -38,9 +42,9 @@ void mergeVersions() {
         // Validate input
         if (inputJarFiles.getFiles().size() < 2) {
             throw new IllegalStateException("""
-                    At least 2 jars must be selected in order for multiversion.
-                    Please configure the forgix extension in your build.gradle file to specify the jars for multiversion.
-                    See https://github.com/PacifistMC/Forgix for more information.""");
+					At least 2 jars must be selected in order for multiversion.
+					Please configure the forgix extension in your build.gradle file to specify the jars for multiversion.
+					See https://github.com/PacifistMC/Forgix for more information.""");
         }
 
         // Perform the merge operation