Versioneer >=0.25 fails to install because it depends on itself

Since 0.25, versioneer has itself as build-time dependency, which results in a failure when trying to install it via pip without using wheels:

$ ./venv/bin/pip install --no-binary :all: versioneer
Collecting versioneer
  Downloading versioneer-0.25.tar.gz (72 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 72.3/72.3 kB 1.7 MB/s eta 0:00:00
  Installing build dependencies ... error
  error: subprocess-exited-with-error

  × pip subprocess to install build dependencies did not run successfully.
  │ exit code: 2
  ╰─> [58 lines of output]
      Collecting setuptools
        Downloading setuptools-65.3.0.tar.gz (2.6 MB)
           ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2.6/2.6 MB 29.8 MB/s eta 0:00:00
        Getting requirements to build wheel: started
        Getting requirements to build wheel: finished with status 'done'
        Installing backend dependencies: started
        Installing backend dependencies: finished with status 'done'
        Preparing metadata (pyproject.toml): started
        Preparing metadata (pyproject.toml): finished with status 'done'
      Collecting versioneer>=0.24
        Using cached versioneer-0.25.tar.gz (72 kB)
      ERROR: Exception:
      Traceback (most recent call last):
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/cli/base_command.py", line 167, in exc_logging_wrapper
          status = run_func(*args)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/cli/req_command.py", line 247, in wrapper
          return func(self, options, args)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/commands/install.py", line 369, in run
          requirement_set = resolver.resolve(
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/resolver.py", line 92, in resolve
          result = self._result = resolver.resolve(
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 481, in resolve
          state = resolution.resolve(requirements, max_rounds=max_rounds)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 348, in resolve
          self._add_to_criteria(self.state.criteria, r, parent=None)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_vendor/resolvelib/resolvers.py", line 172, in _add_to_criteria
          if not criterion.candidates:
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_vendor/resolvelib/structs.py", line 151, in __bool__
          return bool(self._sequence)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 155, in __bool__
          return any(self)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 143, in <genexpr>
          return (c for c in iterator if id(c) not in self._incompatible_ids)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 47, in _iter_built
          candidate = func()
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/factory.py", line 206, in _make_candidate_from_link
          self._link_candidate_cache[link] = LinkCandidate(
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 297, in __init__
          super().__init__(
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 162, in __init__
          self.dist = self._prepare()
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 231, in _prepare
          dist = self._prepare_distribution()
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 308, in _prepare_distribution
          return preparer.prepare_linked_requirement(self._ireq, parallel_builds=True)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/operations/prepare.py", line 438, in prepare_linked_requirement
          return self._prepare_linked_requirement(req, parallel_builds)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/operations/prepare.py", line 524, in _prepare_linked_requirement
          dist = _get_prepared_distribution(
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/operations/prepare.py", line 67, in _get_prepared_distribution
          with build_tracker.track(req):
        File "/usr/lib/python3.10/contextlib.py", line 135, in __enter__
          return next(self.gen)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/operations/build/build_tracker.py", line 122, in track
          self.add(req)
        File "/home/timo/venv/lib/python3.10/site-packages/pip/_internal/operations/build/build_tracker.py", line 92, in add
          raise LookupError(message)
      LookupError: https://files.pythonhosted.org/packages/4d/25/434d899300e8ffc6bce910185fc26fecd727839a4995bdb6ac7346481568/versioneer-0.25.tar.gz (from https://pypi.org/simple/versioneer/) (requires-python:>=3.7) is already being built: versioneer from https://files.pythonhosted.org/packages/4d/25/434d899300e8ffc6bce910185fc26fecd727839a4995bdb6ac7346481568/versioneer-0.25.tar.gz
      [end of output]

Not sure what the correct solution here is. I guess ideally a package shouldn’t depend on itself?

[TimoRoth]

Yep, works as expected again now, thanks!

[effigies]

@TimoRoth 0.26 has been pushed to pypi. Can you confirm that it works for you?