Re: A little pre-packaging help, please?

I'm attaching what I used to make this work, which is a Docker-based process. Just expand the tarball, enter the resulting directory, and run ./docker-build.sh.
________________________________
From: Michael Pilato <cmpilato_at_collab.net>
Sent: Friday, March 13, 2020 2:49 PM
To: Yasuhito FUTATSUKI <futatuki_at_poem.co.jp>; dev_at_subversion.apache.org <dev_at_subversion.apache.org>
Subject: Re: A little pre-packaging help, please?

[EXTERNAL EMAIL]

> However as I wrote before[1] it is need to specify SWIG_PY_OPTS
> shell/environment variable to generate SWIG Python bindings C source
> and support codes. The value of SWIG_PY_OPTS depends on which is its
> target py2 or py3, on which SWIG version is prior 4.0 or not.

This was the key thing lacking! When I added the SWIG_PY_OPTS stuff you recommended to the release.py command-line, those files generated as expected. (And I wound up with what appears to be working build, including Python3 bindings.)