Core "grpc" extra not found by setuptools

[markcwhitfield]

google-cloud-pubsub==0.28.4 requires google-cloud-core[grpc] > 0.27.1, <0.28dev. I can see from the core library's setuptools build that the grpc extra is declared; however, setuptools does not seem to be able to locate it from the published PyPi package for whatever reason:

$ docker run python:3 bash -c "pip install google-cloud-core[grpc]"  # python:2 no different
Collecting google-cloud-core[grpc]
  Downloading google_cloud_core-0.27.1-py2.py3-none-any.whl (50kB)
  google-cloud-core 0.27.1 does not provide the extra 'grpc'
...
Successfully installed cachetools-2.0.1 certifi-2017.7.27.1 chardet-3.0.4 google-auth-1.1.1 google-cloud-core-0.27.1 googleapis-common-protos-1.5.3 idna-2.6 protobuf-3.4.0 pyasn1-0.3.7 pyasn1-modules-0.1.5 requests-2.18.4 rsa-3.4.2 six-1.11.0 urllib3-1.22

When installing via pip this is not really an issue, so long as grpcio is included somewhere in the dependency tree, as pip will happily ignore it. Setuptools itself will not, however, and including google-cloud-pubsub==0.28.4 as a requirement in a setuptools build is currently impossible, so far as I can tell.

[dhermes]

@markcwhitfield Sorry about that! The issue is that we haven't released the updated google-cloud-core that requires that yet!

Thanks a ton for reporting!

[markcwhitfield]

Oh, haha. Hadn't even noticed that 0.28.4 was only 3 hours old. Just poor timing on my part, I suppose.

[dhermes]

And poor something else on our part!

[theacodes]

i'd prefer we hold off on releasing core (it's a big release) and just release a patch of pubsub that fixes this.

[dhermes]

SGTM. @lukesneeringer SGTY?

[dhermes]

Can I propose we add .devN suffixes to all version numbers? This way we can accurately reflect, e.g. that google-cloud-pubsub depends on google-cloud-core >= 0.28.0.dev1.

Ref: https://snarky.ca/how-i-manage-package-version-numbers/

[lukesneeringer]

Oh wow, fail on me for not seeing a p0 ticket.
Yes, releasing an update to pubsub to solve the immediate problem is fine.

[noamt]

So how can we actually resolve this in the meantime?
My setup.py declares google-cloud-storage==1.5.0 and google-cloud-pubsub==0.28.4 but it failes with

Traceback (most recent call last):
  File "setup.py", line 15, in <module>
    install_requires=['google-cloud-storage==1.5.0', 'google-cloud-pubsub==0.28.4', 'backoff==1.4.3'],
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 151, in setup
    dist.run_commands()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/Library/Python/2.7/site-packages/setuptools/command/install.py", line 67, in run
    self.do_egg_install()
  File "/Library/Python/2.7/site-packages/setuptools/command/install.py", line 117, in do_egg_install
    cmd.run()
  File "/Library/Python/2.7/site-packages/setuptools/command/easy_install.py", line 411, in run
    self.easy_install(spec, not self.no_deps)
  File "/Library/Python/2.7/site-packages/setuptools/command/easy_install.py", line 653, in easy_install
    return self.install_item(None, spec, tmpdir, deps, True)
  File "/Library/Python/2.7/site-packages/setuptools/command/easy_install.py", line 700, in install_item
    self.process_distribution(spec, dist, deps)
  File "/Library/Python/2.7/site-packages/setuptools/command/easy_install.py", line 745, in process_distribution
    [requirement], self.local_index, self.easy_install
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 875, in resolve
    new_requirements = dist.requires(req.extras)[::-1]
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2683, in requires
    "%s has no such extra feature %r" % (self, ext)
pkg_resources.UnknownExtra: google-cloud-core 0.27.1 has no such extra feature 'grpc'```