delocate/delocating.py: Sanitize each file only once

Author: mkoeppe

delocate/delocating.py

@@ -141,11 +141,18 @@ def _sanitize_rpaths(
     Returns the paths of modified binaries which require new code signing.
     """
     needs_signing = set()
+    requiring_sanitizes = {}  # requiring -> True
     for required in files_to_delocate:
         # Set relative path for local library
         for requiring, orig_install_name in lib_dict[required].items():
             if _remove_absolute_rpaths(requiring):
-                needs_signing.add(Path(requiring))
+            _remove_absolute_rpaths(requiring)
+            requiring_sanitizes[requiring] = True
+
+    for requiring in requiring_sanitizes:
+        if _remove_absolute_rpaths(requiring):
+            needs_signing.add(Path(requiring))
+
     return needs_signing