BLD: clean-up sdist creation

MANIFEST.in

@@ -15,6 +15,7 @@ graft pandas
 global-exclude *.bz2
 global-exclude *.csv
 global-exclude *.dta
+global-exclude *.feather
 global-exclude *.gz
 global-exclude *.h5
 global-exclude *.html
@@ -24,7 +25,10 @@ global-exclude *.pickle
 global-exclude *.png
 global-exclude *.pyc
 global-exclude *.pyd
+global-exclude *.ods
+global-exclude *.odt
 global-exclude *.sas7bdat
+global-exclude *.sav
 global-exclude *.so
 global-exclude *.xls
 global-exclude *.xlsm

doc/source/whatsnew/v1.0.0.rst

@@ -231,6 +231,8 @@ Build Changes
 ^^^^^^^^^^^^^
 - Fixed pyqt development dependency issue because of different pyqt package name in conda and PyPI (:issue:`26838`)
 - Added a `pyproject.toml <https://www.python.org/dev/peps/pep-0517/>`_ file (:issue:`20775`)
+- Pandas no longer includes cythonized C files in the source distribution uploaded to PyPI. As long as the version of ``pip``
+  supports reading a ``pyproject.toml``, no changes should be required in the build environment. The does not affect users installing wheels (:issue:`28341`).
 
 
 ExtensionArray

setup.py

@@ -522,14 +522,14 @@ def run(self):
 # re-compile.
 def maybe_cythonize(extensions, *args, **kwargs):
     """
-    Render tempita templates before calling cythonize
+    Render tempita templates before calling cythonize. This is skipped for
+
+    * clean
+    * sdist
     """
-    if len(sys.argv) > 1 and "clean" in sys.argv:
-        # Avoid running cythonize on `python setup.py clean`
+    if "clean" in sys.argv or "sdist" in sys.argv:
         # See https://github.com/cython/cython/issues/1495
         return extensions
-    elif "sdist" in sys.argv:
-        return extensions
 
     numpy_incl = pkg_resources.resource_filename("numpy", "core/include")
     # TODO: Is this really necessary here?