chore: import upstream snapshot with attribution

tensorflow/python/user_ops/BUILD

@@ -0,0 +1,32 @@
+# Description:
+#   Contains User Ops (internal TensorFlow version).
+
+load("@xla//third_party/rules_python/python:py_library.bzl", "py_library")
+load("//tensorflow/python:build_defs.bzl", "tf_gen_op_wrapper_private_py")
+
+visibility = [
+    "//tensorflow:internal",
+]
+
+package(
+    # copybara:uncomment default_applicable_licenses = ["//tensorflow:license"],
+    default_visibility = visibility,
+    licenses = ["notice"],
+)
+
+tf_gen_op_wrapper_private_py(
+    name = "user_ops_gen",
+    out = "ops/gen_user_ops.py",
+    py_lib_rule = py_library,
+)
+
+# This target is deprecated.
+py_library(
+    name = "ops",
+    srcs = ["user_ops.py"],
+    strict_deps = True,
+    deps = [
+        ":user_ops_gen",
+        "//tensorflow/python/util:tf_export",
+    ],
+)

tensorflow/python/user_ops/user_ops.py

@@ -0,0 +1,28 @@
+# Copyright 2015 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+"""All user ops."""
+
+from tensorflow.python.user_ops.ops import gen_user_ops as _gen_user_ops
+
+# go/tf-wildcard-import
+from tensorflow.python.user_ops.ops.gen_user_ops import *  # pylint: disable=wildcard-import
+from tensorflow.python.util.tf_export import tf_export
+
+
+@tf_export(v1=['user_ops.my_fact'])
+def my_fact():
+  """Example of overriding the generated code for an Op."""
+  return _gen_user_ops.fact()