Drop versioneer; hard-code the version, as for the Khiops binaries

Author: popescu-v

khiops/__init__.py

@@ -22,19 +22,32 @@
   (extension ".khcj")
 - sklearn: Scikit-Learn estimator classes to learn and use Khiops models
 """
-import importlib
-import importlib.util
+import importlib.metadata
 import os
 import sys
 import warnings
 from copy import copy
+from importlib.metadata import PackageNotFoundError
 from pathlib import Path
 
-from khiops._version import get_versions
 from khiops.core.internals.version import KhiopsVersion
 
-__version__ = get_versions()["version"]
-del get_versions
+try:
+    # Package is installed
+    __version__ = importlib.metadata.version(__name__)
+except PackageNotFoundError:
+    # Package is not installed, hence parse the pyproject.toml file
+    try:
+        # Python >= 3.11: use the standard-library tomllib module
+        import tomllib as tomli
+    except ModuleNotFoundError:
+        # Python < 3.11: use the Pip-vendored tomli module
+        from pip._vendor import tomli
+    with open("pyproject.toml", "rb") as metadata_file:
+        metadata = tomli.load(metadata_file)
+
+        # Strip "-" from pre-release versions to match installed package metadata
+        __version__ = metadata.get("project").get("version").replace("-", "")
 
 
 def get_compatible_khiops_version():