fix: Keep symlinks when copying files after build (#7890)

Author: valerena

samcli/lib/utils/osutils.py

@@ -180,7 +180,7 @@ def copytree(source, destination, ignore=None):
             copytree(new_source, new_destination, ignore=ignore)
         else:
             try:
-                shutil.copy2(new_source, new_destination)
+                shutil.copy2(new_source, new_destination, follow_symlinks=False)
             except OSError as e:
                 if e.errno != errno.EINVAL:
                     raise e

tests/unit/lib/utils/test_osutils.py

@@ -107,7 +107,7 @@ def test_must_copytree(self, patched_copy2, patched_os, patched_path):
         osutils.copytree(source_path, destination_path)
 
         patched_os.path.join.assert_called()
-        patched_copy2.assert_called_with(source_path, destination_path)
+        patched_copy2.assert_called_with(source_path, destination_path, follow_symlinks=False)
 
     @patch("samcli.lib.utils.osutils.Path")
     @patch("samcli.lib.utils.osutils.os")
@@ -127,7 +127,7 @@ def test_copytree_throws_oserror_path_exists(self, patched_copy2, patched_os, pa
             osutils.copytree(source_path, destination_path)
 
         patched_os.path.join.assert_called()
-        patched_copy2.assert_called_with(source_path, destination_path)
+        patched_copy2.assert_called_with(source_path, destination_path, follow_symlinks=False)
 
     @patch("samcli.lib.utils.osutils.create_symlink_or_copy")
     @patch("samcli.lib.utils.osutils.Path")
@@ -149,7 +149,7 @@ def test_copytree_symlink_copy_error_handling(
         osutils.copytree(source_path, destination_path)
 
         patched_os.path.join.assert_called()
-        patched_copy2.assert_called_with(source_path, destination_path)
+        patched_copy2.assert_called_with(source_path, destination_path, follow_symlinks=False)
         patched_create_symlink_or_copy.assert_called_with(source_path, destination_path)