Upgrading from 0.18 to 0.19 breaks my project's installation

I just tried updating the versioneer files in my project from 0.18 to 0.19, however, this completely breaks my installation. I use a setup.py file that is a little more complicated than normal in that I need to compile a bunch of fortran files and modify the build classes. After upgrading to 0.19, I get the eerily uniformative error message:

/opt/miniconda3/envs/py38/lib/python3.8/site-packages/setuptools/dist.py:458: UserWarning: Normalizing 'v4.7.1+32.g2686b7b8.dirty' to '4.7.1+32.g2686b7b8.dirty'
      warnings.warn(tmpl.format(**locals()))
    error: unknown file type '.f95' (from 'src/PythonWrapper.f95')

Setting tag_prefix = 'v' in the setup.cfg file gets rid of the first warning, but the second error persists.

This error is so odd, that it took me a long time to even consider that versioneer was the problem. Replacing the versioneer.py and _version.py with the old versions confirms that versioneer 0.19 is the problem.

So, I have no idea how this could occur. I went through the instructions, and the only non-standard thing that I am doing is defining the cmdclass as folllows:

cmdclass = {'sdist': sdist, 'build': build, 'install': install, 'develop': develop}
cmdclass.update(versioneer.get_cmdclass())

Given that this worked beforehand, I suspect that this is not the problem.

Does anyone have any suggestions on how to debug this? I would like to to use 0.19!

[effigies]

@MarkWieczorek Should be fixed in 0.20. Please reopen if not.

[effigies]

There’s a secondary issue, which is that Versioneer’s build_ext does not subclass from a passed cmdclass[“build_ext”], which needs to be fixed.

Actually, that was fixed in #232. If you’re comfortable updating your versioneer to current master, then you should be able to fix this by updating your setup.py:

diff --git a/setup.py b/setup.py
index a1be43ae..92a014fe 100644
--- a/setup.py
+++ b/setup.py
@@ -20,11 +20,10 @@ import sysconfig  # noqa: E402
 import setuptools  # noqa: E402
 import numpy  # noqa: E402
 import versioneer  # noqa: E402
-from numpy.distutils.core import setup  # noqa: E402
+from numpy.distutils.core import setup, numpy_cmdclass  # noqa: E402
 from numpy.distutils.command.build import build as _build  # noqa: E402
 from numpy.distutils.command.install import install as _install  # noqa: E402
 from numpy.distutils.command.develop import develop as _develop  # noqa: E402
-from numpy.distutils.command.sdist import sdist  # noqa: E402
 from numpy.distutils.fcompiler import FCompiler  # noqa: E402
 from numpy.distutils.fcompiler import get_default_fcompiler  # noqa: E402
 from numpy.distutils.misc_util import Configuration  # noqa: E402
@@ -212,9 +211,9 @@ def configuration(parent_package='', top_path=None):
     return config
 
 
-CMDCLASS = {'sdist': sdist, 'build': build, 'install': install,
-            'develop': develop}
-CMDCLASS.update(versioneer.get_cmdclass())
+CMDCLASS = numpy_cmdclass
+CMDCLASS.update({'build': build, 'install': install, 'develop': develop})
+CMDCLASS = versioneer.get_cmdclass(CMDCLASS)
 
 metadata = dict(
     name='pyshtools',