1 files changed, 35 insertions, 0 deletions
diff --git a/setuptools/config/__init__.py b/setuptools/config/__init__.py
new file mode 100644
index 0000000..35458d8
--- /dev/null
+++ b/setuptools/config/__init__.py
@@ -0,0 +1,35 @@
+"""For backward compatibility, expose main functions from
+``setuptools.config.setupcfg``
+"""
+import warnings
+from functools import wraps
+from textwrap import dedent
+from typing import Callable, TypeVar, cast
+
+from .._deprecation_warning import SetuptoolsDeprecationWarning
+from . import setupcfg
+
+Fn = TypeVar("Fn", bound=Callable)
+
+__all__ = ('parse_configuration', 'read_configuration')
+
+
+def _deprecation_notice(fn: Fn) -> Fn:
+    @wraps(fn)
+    def _wrapper(*args, **kwargs):
+        msg = f"""\
+        As setuptools moves its configuration towards `pyproject.toml`,
+        `{__name__}.{fn.__name__}` became deprecated.
+
+        For the time being, you can use the `{setupcfg.__name__}` module
+        to access a backward compatible API, but this module is provisional
+        and might be removed in the future.
+        """
+        warnings.warn(dedent(msg), SetuptoolsDeprecationWarning)
+        return fn(*args, **kwargs)
+
+    return cast(Fn, _wrapper)
+
+
+read_configuration = _deprecation_notice(setupcfg.read_configuration)
+parse_configuration = _deprecation_notice(setupcfg.parse_configuration)