Back to flit?

[flying-sheep]

As you said, flit is much nicer, the only problem is that pip install from git is super slow for scvelo using it. This issue is for investigating why and figuring out how to fix the slowness.

One option would be pypa/pip#6144, so let’s try checking out the commit before switching to setuptools: 3670999

$ git checkout 367099972c863370d27d472d29ce39fa85c9b4eb
$ pip install --user --no-build-isolation .

If this doesn’t fix it, let‘s see if we can find the real cause!

[VolkerBergen]

Thanks, I am actually quite satisfied with setuptools backend (instead of flit) as it is fast and works as expected.

With no-iso install I get the following pep517 error.

pip install --user --no-build-isolation .

Traceback

  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 188, in main
    status = self.run(options, args)
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 345, in run
    resolver.resolve(requirement_set)
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_internal/legacy_resolve.py", line 196, in resolve
    self._resolve_one(requirement_set, req)
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_internal/legacy_resolve.py", line 359, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_internal/legacy_resolve.py", line 307, in _get_abstract_dist_for
    self.require_hashes
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_internal/operations/prepare.py", line 215, in prepare_linked_requirement
    finder, self.build_isolation,
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_internal/distributions/source.py", line 79, in prepare_distribution_metadata
    self.req.prepare_metadata()
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_internal/req/req_install.py", line 549, in prepare_metadata
    self.prepare_pep517_metadata()
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_internal/req/req_install.py", line 594, in prepare_pep517_metadata
    metadata_dir
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_vendor/pep517/wrappers.py", line 86, in prepare_metadata_for_build_wheel
    'config_settings': config_settings,
  File "/Users/volker.bergen/anaconda3/envs/py36/lib/python3.6/site-packages/pip/_vendor/pep517/wrappers.py", line 162, in _call_hook
    raise BackendUnavailable
pip._vendor.pep517.wrappers.BackendUnavailable

[flying-sheep]

You forgot to upload a wheel for the newest release:

python setup.py bdist_wheel
twine upload dist/scvelo-....whl

[VolkerBergen]

Thanks, fixed. Decided not to move back to flit for now.