Fix file list for root directory

src/Util/Casacore.cc

@@ -103,34 +103,41 @@ casacore::String GetResolvedFilename(const string& root_dir, const string& direc
     // (absolute pathname with symlinks resolved)
     casacore::String resolved_filename;
     casacore::Path path(root_dir);
-    path.append(directory);
-    casacore::File cc_directory(path);
+    if (directory != ".") {
+        path.append(directory);
+    }
+    casacore::File cc_file(path);
 
-    if (!cc_directory.exists()) {
+    // Check directory for error messages
+    if (!cc_file.exists()) {
         message = "Directory " + directory + " does not exist.";
-    } else if (!cc_directory.isReadable()) {
+    } else if (!cc_file.isReadable()) {
         message = "Directory " + directory + " is not readable.";
     } else {
+        // Check file
         path.append(file);
-        casacore::File cc_file(path);
-
+        cc_file = casacore::File(path);
         if (!cc_file.exists()) {
             message = "File " + file + " does not exist.";
         } else if (!cc_file.isReadable()) {
             message = "File " + file + " is not readable.";
         } else {
             try {
-                resolved_filename = cc_file.path().resolvedName();
+                resolved_filename = path.resolvedName();
             } catch (const casacore::AipsError& err) {
                 try {
-                    resolved_filename = cc_file.path().absoluteName();
+                    resolved_filename = path.absoluteName();
+                    // Workaround for casacore parsing bug when path is "/"
+                    if (resolved_filename.empty()) {
+                        resolved_filename = path.originalName();
+                    }
                 } catch (const casacore::AipsError& err) {
-                    // return empty string
                     message = "Cannot resolve file path.";
                 }
             }
         }
     }
+
     return resolved_filename;
 }