mim conflicts with pip and doesn't allow installing mmdet when using pip==23.2.1 (repeated download)

[apacha]

Describe the bug
Pip and mim conflict in their latest version (pip==23.2.1) and mmdet can't be installed anymore.
The highest pip version that worked was 23.1.2.

Reproduction

Building this docker image will fail:

FROM python:3.8.13-slim

RUN apt-get update && apt-get install -y gnupg

RUN pip install pip==23.2.1
# Equivalent to `RUN pip install --upgrade pip` as of 21.08.2023
RUN pip --version

# Installing mmdet and mmcv
RUN pip install torch==1.10.0 torchvision==0.11.1
RUN pip install -U openmim
RUN mim install mmcv-full==1.4.4 mmdet==2.21.0 mmocr==0.6.1

# Entry point
CMD ["/bin/bash"]

after printing many of these:

Collecting mmdet==2.21.0
  Downloading mmdet-2.21.0.tar.gz (689 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 689.4/689.4 kB 15.5 MB/s eta 0:00:00
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
Saved /tmp/tmp0ynkm75l/mmdet-2.21.0.tar.gz
Collecting mmdet==2.21.0
  Using cached mmdet-2.21.0.tar.gz (689 kB)
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
Saved /tmp/tmp1mh3679a/mmdet-2.21.0.tar.gz
Collecting mmdet==2.21.0
  Using cached mmdet-2.21.0.tar.gz (689 kB)
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
Saved /tmp/tmpcj8tumsq/mmdet-2.21.0.tar.gz
Collecting mmdet==2.21.0
  Using cached mmdet-2.21.0.tar.gz (689 kB)
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
Saved /tmp/tmpxg1wxzn3/mmdet-2.21.0.tar.gz
Collecting mmdet==2.21.0
  Using cached mmdet-2.21.0.tar.gz (689 kB)
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
Saved /tmp/tmplsc35t4e/mmdet-2.21.0.tar.gz
Collecting mmdet==2.21.0
  Using cached mmdet-2.21.0.tar.gz (689 kB)
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
Saved /tmp/tmpamjr9wyp/mmdet-2.21.0.tar.gz
Collecting mmdet==2.21.0
  Using cached mmdet-2.21.0.tar.gz (689 kB)
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'done'
Saved /tmp/tmpc7kq9oee/mmdet-2.21.0.tar.gz

whereas

FROM python:3.8.13-slim

RUN apt-get update && apt-get install -y gnupg

RUN pip install pip==23.0.0
RUN pip --version

# Installing mmdet and mmcv
RUN pip install torch==1.10.0 torchvision==0.11.1
RUN pip install -U openmim
RUN mim install mmcv-full==1.4.4 mmdet==2.21.0 mmocr==0.6.1

# Entry point
CMD ["/bin/bash"]

works.

To reproduce the issue, copy the code from above into a file called test.dockerfile and then run docker build -f test.dockerfile .

Environment

Docker (see above image)

Error traceback

pip download failed with args: ['mmdet==2.21.0', '-d', '/tmp/tmp0ynkm75l', '--no-deps', '--no-binary', ':all:']
ERROR: Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/cli/base_command.py", line 180, in exc_logging_wrapper
    status = run_func(*args)
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/cli/req_command.py", line 248, in wrapper
    return func(self, options, args)
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/commands/install.py", line 377, in run
    requirement_set = resolver.resolve(
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/resolver.py", line 92, in resolve
    result = self._result = resolver.resolve(
  File "/usr/local/lib/python3.8/site-packages/pip/_vendor/resolvelib/resolvers.py", line 546, in resolve
    state = resolution.resolve(requirements, max_rounds=max_rounds)
  File "/usr/local/lib/python3.8/site-packages/pip/_vendor/resolvelib/resolvers.py", line 427, in resolve
    failure_causes = self._attempt_to_pin_criterion(name)
  File "/usr/local/lib/python3.8/site-packages/pip/_vendor/resolvelib/resolvers.py", line 239, in _attempt_to_pin_criterion
    criteria = self._get_updated_criteria(candidate)
  File "/usr/local/lib/python3.8/site-packages/pip/_vendor/resolvelib/resolvers.py", line 229, in _get_updated_criteria
    for requirement in self._p.get_dependencies(candidate=candidate):
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/provider.py", line 244, in get_dependencies
    return [r for r in candidate.iter_dependencies(with_requires) if r is not None]
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/provider.py", line 244, in <listcomp>
    return [r for r in candidate.iter_dependencies(with_requires) if r is not None]
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/candidates.py", line 241, in iter_dependencies
    requires = self.dist.iter_dependencies() if with_requires else ()
  File "/usr/local/lib/python3.8/site-packages/pip/_internal/metadata/pkg_resources.py", line 216, in iter_dependencies
    return self._dist.requires(extras)
  File "/usr/local/lib/python3.8/site-packages/mim/commands/install.py", line 207, in patched_requires
    mmdeps_text = get_mmdeps_from_mmpkg(self.project_name,
  File "/usr/local/lib/python3.8/site-packages/mim/commands/install.py", line 321, in get_mmdeps_from_mmpkg
    mminstall_content = get_mminstall_from_pypi(mmpkg, index_url=index_url)
  File "/usr/local/lib/python3.8/site-packages/mim/commands/install.py", line 351, in get_mminstall_from_pypi
    exit(status_code)
  File "/usr/local/lib/python3.8/_sitebuiltins.py", line 26, in __call__
    raise SystemExit(code)
SystemExit: 2

Bug fix
Not sure, which subsystem of pip conflicts here with mim, but downgrading pip fixes the problem, but is not a satisfying solution.