fix #1151 - check for symbolic links before removing directories in run_opensfm.py

stages/run_opensfm.py

@@ -34,10 +34,12 @@ class ODMOpenSfMStage(types.ODM_Stage):
         self.update_progress(70)
 
         if args.optimize_disk_space:
-            shutil.rmtree(octx.path("features"))
-            shutil.rmtree(octx.path("matches"))
-            shutil.rmtree(octx.path("exif"))
-            shutil.rmtree(octx.path("reports"))
+            for folder in ["features", "matches", "exif", "reports"]:
+                folder_path = octx.path(folder)
+                if os.path.islink(folder_path):
+                    os.unlink(folder_path)
+                else:
+                    shutil.rmtree(folder_path)
 
         # If we find a special flag file for split/merge we stop right here
         if os.path.exists(octx.path("split_merge_stop_at_reconstruction.txt")):