Remove __about__ file in favour of keeping constants in __init__

This makes it possible for flit to auto-discover the version from this
file.

.github/workflows/lint.yml

@@ -39,7 +39,7 @@ jobs:
     # Linting verifies that the project is in an acceptable state to create files
     # for releasing.
     # And this action should be run whenever a release is ready to go public as
-    # the version number will be changed by editing __about__.py.
+    # the version number will be changed by editing __init__.py.
     needs: lint
 
     steps:

docs/conf.py

@@ -8,7 +8,7 @@
 
 ABOUT = {}
 _BASE_DIR = os.path.join(os.path.dirname(__file__), os.pardir)
-with open(os.path.join(_BASE_DIR, "packaging", "__about__.py")) as f:
+with open(os.path.join(_BASE_DIR, "packaging", "__init__.py")) as f:
     exec(f.read(), ABOUT)
 
 # -- General configuration ----------------------------------------------------

noxfile.py

@@ -95,7 +95,7 @@ def docs(session):
 @nox.session
 def release(session):
     package_name = "packaging"
-    version_file = Path(f"{package_name}/__about__.py")
+    version_file = Path(f"{package_name}/__init__.py")
     changelog_file = Path("CHANGELOG.rst")
 
     try:

packaging/__init__.py

@@ -2,24 +2,14 @@
 # 2.0, and the BSD License. See the LICENSE file in the root of this repository
 # for complete details.
 
-from .__about__ import (
-    __author__,
-    __copyright__,
-    __email__,
-    __license__,
-    __summary__,
-    __title__,
-    __uri__,
-    __version__,
-)
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
 
-__all__ = [
-    "__title__",
-    "__summary__",
-    "__uri__",
-    "__version__",
-    "__author__",
-    "__email__",
-    "__license__",
-    "__copyright__",
-]
+__version__ = "22.1.dev0"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD-2-Clause or Apache-2.0"
+__copyright__ = "2014-2019 %s" % __author__