uv: Dependency resolution regression in 0.1.33

Hey 👋🏼

thanks for all the work on uv! We recently incorporated it into all the tools we develop as part of our research (https://mqt.readthedocs.io) and the transition was really smooth! 😎

However, I believe the latest version (specifically the changes from #3087) might have broken our CI pipelines. For a production workflow run failing, see: https://github.com/cda-tum/mqt-core/actions/runs/8744279279/job/23998070565

I tried to construct a minimal reproducible example from what I could gather. The following is the best I could come up with.

Given the following pyproject.toml

[build-system]
requires = ["scikit-build-core>=0.8.1"]
build-backend = "scikit_build_core.build"

[project]
name = "uv_reproducer"
requires-python = ">=3.8"
version = "0.1.0"

[project.optional-dependencies]
test = ["pytest>=7.0"]
coverage = ["uv_reproducer[test]", "pytest-cov>=4"]

and a minimal CMakeLists.txt

cmake_minimum_required(VERSION 3.15...3.26)
project(${SKBUILD_PROJECT_NAME} LANGUAGES CXX)

The following chain of commands will error out

uv venv
source .venv/bin/activate
uv pip install scikit-build-core[pyproject]==0.8.1
uv pip install '-ve.[test,coverage]' --resolution=lowest-direct --no-build-isolation

See below for the complete output. This is on uv version 0.1.33 running on Ubuntu 22.04. Tested to work on version 0.1.32. My guess would be that it has to do with the recursive self dependencies that are now resolved differently, for whatever reason. Interestingly, running with build isolation, i.e.

uv venv
source .venv/bin/activate
uv pip install '-ve.[test,coverage]' --resolution=lowest-direct

works just fine.

Would be nice to know if this change was intentional and I am missing something or if there is something to be fixed here (at least the scenario above was working in previous versions). Let me know if you need any more info!

The full error log of the uv pip install '-ve.[test,coverage]' --resolution=lowest-direct --no-build-isolation command is as follows:

INFO Found a virtualenv through VIRTUAL_ENV at: /home/lburgholzer/PycharmProjects/uv-reproducer/.venv
DEBUG Cached interpreter info for Python 3.10.12, skipping probing: .venv/bin/python
DEBUG Using Python 3.10.12 environment at .venv/bin/python
DEBUG Trying to lock if free: .venv/.lock
DEBUG Using registry request timeout of 300s
DEBUG Building (editable) file:///home/lburgholzer/PycharmProjects/uv-reproducer
DEBUG Calling `scikit_build_core.build.build_editable(metadata_directory=None)`
DEBUG Finished building (editable): uv-reproducer @ file:///home/lburgholzer/PycharmProjects/uv-reproducer
Built 1 editable in 635ms
DEBUG Solving with target Python version 3.10.12
DEBUG Searching for a compatible version of uv-reproducer[coverage] @ file:///home/lburgholzer/PycharmProjects/uv-reproducer (==0.1.0)
DEBUG Adding transitive dependency for uv-reproducer[coverage]0.1.0: uv-reproducer*
DEBUG Adding transitive dependency for uv-reproducer[coverage]0.1.0: uv-reproducer[test]*
DEBUG Adding transitive dependency for uv-reproducer[coverage]0.1.0: pytest-cov>=4
TRACE Fetching metadata for pytest-cov from https://pypi.org/simple/pytest-cov/
TRACE No cache entry exists for /home/lburgholzer/.cache/uv/simple-v7/pypi/pytest-cov.rkyv
DEBUG No cache entry for: https://pypi.org/simple/pytest-cov/
TRACE Sending fresh GET request for https://pypi.org/simple/pytest-cov/
TRACE Handling request for https://pypi.org/simple/pytest-cov/
TRACE No credentials on request, checking cache...
TRACE No credentials in cache.
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DEBUG Preparing metadata for: uv-reproducer @ file:///home/lburgholzer/PycharmProjects/uv-reproducer
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DEBUG Found static `pyproject.toml` for: uv-reproducer @ file:///home/lburgholzer/PycharmProjects/uv-reproducer
TRACE Received source distribution metadata for: uv-reproducer @ file:///home/lburgholzer/PycharmProjects/uv-reproducer
TRACE cached request https://pypi.org/simple/pytest-cov/ is storable because its response has a 'public' cache-control directive
TRACE Received package metadata for: pytest-cov
TRACE selecting candidate for package pytest-cov with range Range { segments: [(Included("4"), Unbounded)] } with 46 remote versions
TRACE found candidate for package PackageName("pytest-cov") with range Range { segments: [(Included("4"), Unbounded)] } after 43 steps: "4.0.0" version
DEBUG Searching for a compatible version of pytest-cov (>=4)
TRACE selecting candidate for package pytest-cov with range Range { segments: [(Included("4"), Unbounded)] } with 46 remote versions
TRACE found candidate for package PackageName("pytest-cov") with range Range { segments: [(Included("4"), Unbounded)] } after 43 steps: "4.0.0" version
DEBUG Selecting: pytest-cov==4.0.0 (pytest_cov-4.0.0-py3-none-any.whl)
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TRACE Fetching metadata for pytest from https://pypi.org/simple/pytest/
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DEBUG Searching for a compatible version of pytest (>=4.6)
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TRACE Fetching metadata for six from https://pypi.org/simple/six/
TRACE Fetching metadata for packaging from https://pypi.org/simple/packaging/
TRACE Fetching metadata for attrs from https://pypi.org/simple/attrs/
TRACE Fetching metadata for atomicwrites from https://pypi.org/simple/atomicwrites/
TRACE Fetching metadata for pluggy from https://pypi.org/simple/pluggy/
TRACE Fetching metadata for importlib-metadata from https://pypi.org/simple/importlib-metadata/
TRACE Fetching metadata for wcwidth from https://pypi.org/simple/wcwidth/
TRACE Fetching metadata for more-itertools from https://pypi.org/simple/more-itertools/
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TRACE Received built distribution metadata for: importlib-metadata==7.1.0
error: Failed to download and build: atomicwrites==1.4.1
  Caused by: Failed to build: atomicwrites==1.4.1
  Caused by: Build backend failed to determine metadata through `prepare_metadata_for_build_wheel` with exit status: 1
--- stdout:

--- stderr:
Traceback (most recent call last):
  File "<string>", line 8, in <module>
ModuleNotFoundError: No module named 'setuptools'
---