Generate __version__ at build to avoid slow importlib.metadata import

.gitignore

@@ -158,3 +158,6 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 .idea/
+
+# hatch-vcs
+src/*/_version.py

pyproject.toml

@@ -55,6 +55,9 @@ scripts.pep = "pepotron.cli:main"
 [tool.hatch]
 version.source = "vcs"
 
+[tool.hatch.build.hooks.vcs]
+version-file = "src/pepotron/_version.py"
+
 [tool.hatch.version.raw-options]
 local_scheme = "no-local-version"
 

src/pepotron/__init__.py

@@ -4,14 +4,13 @@
 
 from __future__ import annotations
 
-import importlib.metadata
 import logging
 from pathlib import Path
 from typing import Any
 
-from . import _cache
+from . import _cache, _version
 
-__version__ = importlib.metadata.version(__name__)
+__version__ = _version.__version__
 
 BASE_URL = "https://peps.python.org"
 JSON_PATH = "/api/peps.json"