Recognize /tfhub as a remote location. (#21211)

* Recognize /tfhub as a remote location.

* Add test

Author: nicolas-aagnes

keras/src/utils/file_utils.py

@@ -415,7 +415,7 @@ def is_remote_path(filepath):
 
     This function checks if the filepath represents a known remote pattern
     such as GCS (`/gcs`), CNS (`/cns`), CFS (`/cfs`), HDFS (`/hdfs`), Placer
-    (`/placer`), or a URL (`.*://`).
+    (`/placer`), TFHub (`/tfhub`), or a URL (`.*://`).
 
     Args:
         filepath (str): The path to be checked.
@@ -424,7 +424,8 @@ def is_remote_path(filepath):
         bool: True if the filepath is a recognized remote path, otherwise False
     """
     if re.match(
-        r"^(/cns|/cfs|/gcs|/hdfs|/readahead|/placer|.*://).*$", str(filepath)
+        r"^(/cns|/cfs|/gcs|/hdfs|/readahead|/placer|/tfhub|.*://).*$",
+        str(filepath),
     ):
         return True
     return False

keras/src/utils/file_utils_test.py

@@ -726,6 +726,9 @@ def test_placer_remote_path(self):
             file_utils.is_remote_path("/placer/prod/scratch/home/some/path")
         )
 
+    def test_tfhub_remote_path(self):
+        self.assertTrue(file_utils.is_remote_path("/tfhub/some/path"))
+
     def test_cfs_remote_path(self):
         self.assertTrue(file_utils.is_remote_path("/cfs/some/path"))