Have versioning be in a single place for some cases (meta-pytorch#1146)

Summary:
Pull Request resolved: meta-pytorch#1146

Goal here is to have one single place for version that will be manully updated.

Differential Revision: D83858764

Author: AbishekS

setup.py

@@ -5,22 +5,12 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
-import os
-import re
 import sys
 from datetime import date
 
 from setuptools import find_packages, setup
 
-
-def get_version():
-    # get version string from version.py
-    # TODO: ideally the version.py should be generated when setup is run
-    version_file = os.path.join(os.path.dirname(__file__), "torchx/version.py")
-    version_regex = r"__version__ = ['\"]([^'\"]*)['\"]"
-    with open(version_file, "r") as f:
-        version = re.search(version_regex, f.read(), re.M).group(1)
-        return version
+from torchx._version import BASE_VERSION
 
 
 def get_nightly_version():
@@ -49,7 +39,7 @@ def get_nightly_version():
     with open("dev-requirements.txt") as f:
         dev_reqs = f.read()
 
-    version = get_nightly_version() if is_nightly else get_version()
+    version = get_nightly_version() if is_nightly else BASE_VERSION
     print(f"-- {name} building version: {version}")
 
     setup(

torchx/_version.py

@@ -0,0 +1,8 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+# pyre-strict
+BASE_VERSION = "0.8.0dev0"

torchx/version.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 # Copyright (c) Meta Platforms, Inc. and affiliates.
 # All rights reserved.
 #
@@ -7,6 +6,7 @@
 
 # pyre-strict
 
+from torchx._version import BASE_VERSION
 from torchx.util.entrypoints import load
 
 # Follows PEP-0440 version scheme guidelines
@@ -18,7 +18,7 @@
 # 0.1.0bN  # Beta release
 # 0.1.0rcN  # Release Candidate
 # 0.1.0  # Final release
-__version__ = "0.8.0dev0"
+__version__: str = BASE_VERSION
 
 
 # Use the github container registry images corresponding to the current package