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Subject: [Bug 233561] converters/py-rencode: Fails to configure if cython is
 installed
Date: Wed, 28 Nov 2018 04:44:44 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D233561

Kubilay Kocak <koobs@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|converters/py-rencode:      |converters/py-rencode:
                   |configure fails if cython   |Fails to configure if
                   |installed                   |cython is installed
                 CC|                            |python@FreeBSD.org,
                   |                            |sunpoet@FreeBSD.org
           Assignee|python@FreeBSD.org          |koobs@FreeBSD.org
             Status|New                         |Open

--- Comment #1 from Kubilay Kocak <koobs@FreeBSD.org> ---
Investigation summary:

1) ports r482774 removed USE_PYTHON=3Dcython (inadvertently, due to (2), or
because the package successfully built without cython)
2) upstream setup.py does not declare cython as a dependency
3) upstream dev-requirements.txt does declare it as a dependency (noop for
setuptools/pip based installs as they use setup.py:*_requires)
4) upstream setup.py conditionally (when importable/found) uses Cython (.pyx
file) for the build, falling back to a setuptools build_ext (.c file) build
5) The 1.0.6 PyPI sdist (only) ships with a .c file
6) Upstream commit 5c928f14567fabc9efb8bbb8ac5e0eef03c61541 via issue #25 [=
1]
adds a pyx file (not yet released).
7) setup.py declares 'sdist requires cython module to generate c' file,
appearing to indicate it (cython) is a development dependency, prior to, and
for producing, the relevant source distribution (which we use).

In my opinion, a cython build (and the dependency on cython) it not necessa=
ry
(particularly given (5) and (7)), even after #25 is released and the
conditional code to build with cython should not be included in setup.py, at
least not as a default case, or without an explicit request by the user to =
use
cython, as an optional build method, for sdist consumers (most downstream
packagers, and setuptools/pip users)

[1]
https://github.com/aresch/rencode/commit/5c928f14567fabc9efb8bbb8ac5e0eef03=
c61541
[2] https://github.com/aresch/rencode/pull/25

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