Rewrite version.py

Author: Sparks29032

src/diffpy/utils/version.py

@@ -13,46 +13,13 @@
 #
 ##############################################################################
 
-"""
-Definition of __version__, __date__, __timestamp__, __git_commit__.
+"""Definition of __version__."""
 
-Notes
------
-Variable `__gitsha__` is deprecated as of version 3.0.
-Use `__git_commit__` instead.
-"""
+# We do not use the other three variables, but can be added back if needed.
+# __all__ = ["__date__", "__git_commit__", "__timestamp__", "__version__"]
 
-__all__ = ["__date__", "__git_commit__", "__timestamp__", "__version__"]
-
-import os.path
-from importlib.resources import as_file, files
-
-# obtain version information from the version.cfg file
-cp = dict(version="", date="", commit="", timestamp="0")
-if __package__ is not None:
-    ref = files(__package__) / "version.cfg"
-    with as_file(ref) as fcfg:
-        if not os.path.isfile(fcfg):  # pragma: no cover
-            from warnings import warn
-
-            warn("Package metadata not found.")
-            fcfg = os.devnull
-        with open(fcfg) as fp:
-            kwords = [
-                [w.strip() for w in line.split(" = ", 1)] for line in fp if line[:1].isalpha() and " = " in line
-            ]
-        assert all(w[0] in cp for w in kwords), "received unrecognized keyword"
-        cp.update(kwords)
-    del kwords
-
-__version__ = cp["version"]
-__date__ = cp["date"]
-__git_commit__ = cp["commit"]
-__timestamp__ = int(cp["timestamp"])
-
-# TODO remove deprecated __gitsha__ in version 3.1.
-__gitsha__ = __git_commit__
-
-del cp
+# obtain version information
+from importlib.metadata import version
+__version__ = version("diffpy.utils")
 
 # End of file