From a65d3dd42122d3a58985d56118d58c5b4224f38f Mon Sep 17 00:00:00 2001
From: Anna R <annarev@google.com>
Date: Fri, 7 Sep 2018 12:20:37 -0700
Subject: Add tf_api_version flag. If --define=tf_api_version=2 flag is passed
 in, then bazel will build TensorFlow API version 2.0. In all other cases, it
 would build API version 1.*.

PiperOrigin-RevId: 212016666
---
 tensorflow/BUILD | 50 ++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 48 insertions(+), 2 deletions(-)

(limited to 'tensorflow/BUILD')

diff --git a/tensorflow/BUILD b/tensorflow/BUILD
index 2926789953..386e0096ff 100644
--- a/tensorflow/BUILD
+++ b/tensorflow/BUILD
@@ -24,6 +24,11 @@ load(
     "//tensorflow/python/tools/api/generator:api_gen.bzl",
     "gen_api_init_files",  # @unused
 )
+load("//tensorflow/python/tools/api/generator:api_gen.bzl", "get_compat_files")
+load(
+    "//tensorflow/python/tools/api/generator:api_init_files.bzl",
+    "TENSORFLOW_API_INIT_FILES",  # @unused
+)
 load(
     "//tensorflow/python/tools/api/generator:api_init_files_v1.bzl",
     "TENSORFLOW_API_INIT_FILES_V1",  # @unused
@@ -33,6 +38,11 @@ load(
     "if_ngraph",
 )
 
+# @unused
+TENSORFLOW_API_INIT_FILES_V2 = (
+    TENSORFLOW_API_INIT_FILES + get_compat_files(TENSORFLOW_API_INIT_FILES_V1, 1)
+)
+
 # Config setting used when building for products
 # which requires restricted licenses to be avoided.
 config_setting(
@@ -428,6 +438,13 @@ config_setting(
     visibility = ["//visibility:public"],
 )
 
+# This flag specifies whether TensorFlow 2.0 API should be built instead
+# of 1.* API. Note that TensorFlow 2.0 API is currently under development.
+config_setting(
+    name = "api_version_2",
+    define_values = {"tf_api_version": "2"},
+)
+
 package_group(
     name = "internal",
     packages = [
@@ -592,13 +609,39 @@ exports_files(
 )
 
 gen_api_init_files(
-    name = "tensorflow_python_api_gen",
+    name = "tf_python_api_gen_v1",
     srcs = ["api_template.__init__.py"],
     api_version = 1,
+    output_dir = "_api/v1/",
     output_files = TENSORFLOW_API_INIT_FILES_V1,
+    output_package = "tensorflow._api.v1",
+    root_init_template = "api_template.__init__.py",
+)
+
+gen_api_init_files(
+    name = "tf_python_api_gen_v2",
+    srcs = ["api_template.__init__.py"],
+    api_version = 2,
+    compat_api_versions = [1],
+    output_dir = "_api/v2/",
+    output_files = TENSORFLOW_API_INIT_FILES_V2,
+    output_package = "tensorflow._api.v2",
     root_init_template = "api_template.__init__.py",
 )
 
+genrule(
+    name = "root_init_gen",
+    srcs = select({
+        "api_version_2": [":tf_python_api_gen_v2"],
+        "//conditions:default": [":tf_python_api_gen_v1"],
+    }),
+    outs = ["__init__.py"],
+    cmd = select({
+        "api_version_2": "cp $(@D)/_api/v2/__init__.py $(OUTS)",
+        "//conditions:default": "cp $(@D)/_api/v1/__init__.py $(OUTS)",
+    }),
+)
+
 py_library(
     name = "tensorflow_py",
     srcs = ["//tensorflow/python/estimator/api:estimator_python_api_gen"],
@@ -613,7 +656,10 @@ py_library(
 
 py_library(
     name = "tensorflow_py_no_contrib",
-    srcs = [":tensorflow_python_api_gen"],
+    srcs = select({
+        "api_version_2": [":tf_python_api_gen_v2"],
+        "//conditions:default": [":tf_python_api_gen_v1"],
+    }) + [":root_init_gen"],
     srcs_version = "PY2AND3",
     visibility = ["//visibility:public"],
     deps = ["//tensorflow/python:no_contrib"],
-- 
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