Added debugging logs

Author: cmaglie

internal/arduino/builder/sketch.go

@@ -58,14 +58,18 @@ func (b *Builder) prepareSketchBuildPath() error {
 	// If the merged source is unchanged, skip writing it.
 	// This avoids unnecessary rebuilds and keeps the build path clean.
 	if !bytes.Equal(oldUnpreprocessedSource, []byte(mergedSource)) {
+		b.logger.Warn(i18n.Tr("Generating sketch files in build path..."))
 		if err := destFileUnpreprocessed.WriteFile([]byte(mergedSource)); err != nil {
 			return err
 		}
 
+		b.logger.Warn(i18n.Tr("Generating sketch files in build path"))
 		destFile := b.sketchBuildPath.Join(b.sketch.MainFile.Base() + ".cpp")
-		if err := destFileUnpreprocessed.CopyTo(destFile); err != nil {
+		if err := destFile.WriteFile([]byte(mergedSource)); err != nil {
 			return err
 		}
+	} else {
+		b.logger.Warn(fmt.Sprintf("%s %s", i18n.Tr("Generating sketch files in build path..."), i18n.Tr("(sketch unchanged)")))
 	}
 
 	if err := b.sketchCopyAdditionalFiles(b.sketchBuildPath, b.sourceOverrides); err != nil {