Add a TODO

Author: pradyunsg

src/pip/_internal/req/req_install.py

@@ -627,6 +627,8 @@ def prepare_pep517_metadata(self):
 
         self.metadata_directory = os.path.join(metadata_dir, distinfo_dir)
 
+    # NOTE: This is only used in get_dist(), so look into eagerly assigning to
+    # metadata_directory in this case, once metadata is generated.
     @property
     def egg_info_path(self):
         # type: () -> str
@@ -702,6 +704,7 @@ def get_dist(self):
             dist_dir = self.egg_info_path.rstrip(os.path.sep)
             # https://github.com/python/mypy/issues/1174
             dist_cls = pkg_resources.Distribution  # type: ignore
+        # dist_dir_name can be of the form "<project>.dist-info" or
         # e.g. "<project>.egg-info".
         base_dir, dist_dir_name = os.path.split(dist_dir)
         dist_name = os.path.splitext(dist_dir_name)[0]