Restore the setuptools version hack

_build_meta.py

@@ -13,78 +13,6 @@
 We comply by re-publishing setuptools' ``build_meta``.
 """
 
-import sys
-from pathlib import Path
-
-if sys.version_info > (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
-
-from importlib.metadata import Distribution, DistributionFinder
-
 from setuptools import build_meta
 
-
-def _entry_points_txt():
-    """
-    Format the entry points from ``pyproject.toml`` as the INI-style
-    ``entry_points.txt`` used in package metadata.
-    """
-    with open(Path(__file__).parent / "pyproject.toml", "rb") as f:
-        data = tomllib.load(f)
-
-    lines = []
-    for section, pairs in data["project"]["entry-points"].items():
-        lines.append(f"[{section}]")
-        for key, value in pairs.items():
-            lines.append(f"{key} = {value}")
-        lines.append("")
-    return "\n".join(lines)
-
-
-class IncrementalEntryPoints(Distribution):
-    """
-    A distribution that exposes the incremental entry points by by
-    reading them from ``pyproject.toml``.
-    """
-
-    def read_text(self, filename):
-        if filename == "METADATA":
-            return None
-        if filename == "PKG-INFO":
-            return (
-                "Metadata-Version: 2.1\n"
-                "Name: incrementalbuildhack\n"
-                "Version: 0.0.0\n"
-            )
-        if filename == "entry_points.txt":
-            return _entry_points_txt()
-        raise NotImplementedError(f"Can't synthesize {filename=}")
-
-    def locate_file(self, path):
-        raise NotImplementedError(f"Can't locate_file({path=})")
-
-
-class EntryPointInjector(DistributionFinder):
-    """
-    Inject incremental's setuptools entry points so that
-    setuptools can find Incremental's own version.
-    """
-
-    def find_distributions(self, context):
-        if context.name is None:
-            yield IncrementalEntryPoints()
-
-    # No-op abstract methods from importlib.abc.MetaPathFinder:
-
-    def find_spec(self, fullname, path, target=None):
-        return None
-
-    def invalidate_caches(self):
-        pass
-
-
-sys.meta_path.insert(0, EntryPointInjector())
-
 __all__ = ["build_meta"]

pyproject.toml

@@ -51,6 +51,9 @@ use_incremental = "incremental:_get_distutils_version"
 [project.entry-points."setuptools.finalize_distribution_options"]
 incremental = "incremental:_get_setuptools_version"
 
+[tool.setuptools.dynamic]
+version = {attr = "incremental._setuptools_version"}
+
 [tool.incremental]
 
 [tool.black]

src/incremental/__init__.py

@@ -517,4 +517,8 @@ def _load_pyproject_toml(toml_path):  # type: (str) -> Optional[_IncrementalConf
 from ._version import __version__  # noqa: E402
 
 
+def _setuptools_version():  # type: () -> str
+    return __version__.public()
+
+
 __all__ = ["__version__", "Version", "getVersionString"]