Deference symbolic link when create tar file

Dereference all symbolic link when packing source code and dependencies. Symbolic link will unlikely have any meaning once deployed in the Docker instance.

Author: mhtrinhLIC

src/sagemaker/utils.py

@@ -331,7 +331,7 @@ def create_tar_file(source_files, target=None):
     else:
         _, filename = tempfile.mkstemp()
 
-    with tarfile.open(filename, mode="w:gz") as t:
+    with tarfile.open(filename, mode="w:gz", dereference=True) as t:
         for sf in source_files:
             # Add all files from the directory into the root of the directory structure of the tar
             t.add(sf, arcname=os.path.basename(sf))