Fixed false positive warning for script statements in preamble.

web-view-components-compiler/src/main/java/groowt/view/component/web/transpile/DefaultGroovyTranspiler.java

@@ -1,6 +1,5 @@
 package groowt.view.component.web.transpile;
 
-import groovy.transform.Field;
 import groowt.view.component.compiler.ComponentTemplateCompileException;
 import groowt.view.component.compiler.ComponentTemplateCompileUnit;
 import groowt.view.component.compiler.ComponentTemplateCompilerConfiguration;
@@ -32,8 +31,6 @@ public class DefaultGroovyTranspiler implements GroovyTranspiler {
 
     private static final Logger logger = LoggerFactory.getLogger(DefaultGroovyTranspiler.class);
 
-    private static final ClassNode FIELD_ANNOTATION = ClassHelper.make(Field.class);
-
     protected TranspilerConfiguration getConfiguration(
             ClassLoaderComponentClassNodeResolver classLoaderComponentClassNodeResolver
     ) {
@@ -122,7 +119,10 @@ public class DefaultGroovyTranspiler implements GroovyTranspiler {
         }
 
         final BlockStatement preambleBlock = convertResult.blockStatement();
-        if (preambleBlock != null) {
+        if (!(preambleBlock == null
+                || preambleBlock.isEmpty()
+                || preambleBlock.getStatements().getFirst() instanceof ReturnStatement)
+        ) {
             logger.warn(
                     "{} contains script statements which are not supported. Currently, only classes and"
                             + " methods are supported. The rest will be ignored.",

web-view-components-compiler/src/testFixtures/java/groowt/view/component/web/transpiler/GroovyTranspilerTests.java

@@ -89,4 +89,14 @@ public abstract class GroovyTranspilerTests {
         this.doTranspile("<GroovyTranspilerTests.Greeter target='World' />");
     }
 
+    @Test
+    public void withPackageInPreamble() {
+        this.doTranspile("""
+                ---
+                package test
+                ---
+                Hello, World!
+                """.stripIndent().trim());
+    }
+
 }