Show full dependency chain when `uv pip compile` encounters an error running setup.py

[alex]

When using --resolution=lowest (or lowest-direct), it's sadly not uncommon to hit errors running setup.py from very old versions of things.

Unfortunately, uv pip compile does not include the full chain of how a dependency was depended on, which can make it difficult to debug. For example:

~/p/cryptography ❯❯❯ uv pip compile --resolution=lowest-direct --universal -p 3.7 --extra=docs --extra=docstest --extra=pep8test --extra=test --extra=test-randomorder --extra=nox --extra=sdist --unsafe-package=cffi --unsafe-package=pycparser --unsafe-package=setuptools --unsafe-package=cryptography-vectors pyproject.toml > ci-constraints-requirements.txt && git diff
warning: The requested Python version 3.7 is not available; 3.13.0 will be used to build dependencies instead.
⠙ Resolving dependencies...                                                                                                  warning: The direct dependency `build` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `certifi` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `check-sdist{python_full_version >= '3.8'}` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `click` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `cryptography-vectors` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `mypy` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `nox` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `pretend` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `pytest-benchmark` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `pytest-cov` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `pytest-randomly` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `pytest-xdist` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `readme-renderer` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
warning: The direct dependency `ruff` is unpinned. Consider setting a lower bound when using `--resolution-strategy lowest` to avoid using outdated versions.
⠋ atomicwrites==1.4.1                                                                                                          × Failed to download and build `wsgiref==0.1.2`
  ╰─▶ Build backend failed to determine requirements with `build_wheel()` (exit status: 1)

      [stderr]
      Traceback (most recent call last):
        File "<string>", line 14, in <module>
          requires = get_requires_for_build({})
        File "/Users/alex_gaynor/Library/Caches/uv/builds-v0/.tmpefXcVs/lib/python3.13/site-packages/setuptools/build_meta.py",
      line 333, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/Users/alex_gaynor/Library/Caches/uv/builds-v0/.tmpefXcVs/lib/python3.13/site-packages/setuptools/build_meta.py",
      line 303, in _get_build_requires
          self.run_setup()
          ~~~~~~~~~~~~~~^^
        File "/Users/alex_gaynor/Library/Caches/uv/builds-v0/.tmpefXcVs/lib/python3.13/site-packages/setuptools/build_meta.py",
      line 521, in run_setup
          super().run_setup(setup_script=setup_script)
          ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/Users/alex_gaynor/Library/Caches/uv/builds-v0/.tmpefXcVs/lib/python3.13/site-packages/setuptools/build_meta.py",
      line 319, in run_setup
          exec(code, locals())
          ~~~~^^^^^^^^^^^^^^^^
        File "<string>", line 5, in <module>
        File
      "/Users/alex_gaynor/Library/Caches/uv/sdists-v6/pypi/wsgiref/0.1.2/TC3J4nFCD9kJFnrhcTIuq/wsgiref-0.1.2.zip/ez_setup/__init__.py",
      line 170
          print "Setuptools version",version,"or greater has been installed."
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      SyntaxError: Missing parentheses in call to 'print'. Did you mean print(...)?

~/p/cryptography ❯❯❯ 

Here, neither wsgiref nor atomicwrites is depended on directly, so I'm not sure which package I need to attach a minimal bound to.

[charliermarsh]

Yeah I think something like this makes sense.

[charliermarsh]

One problem here is that if this happens during installation (rather than resolution), we may have already discarded the resolution itself (which would explain why it's included).

[charliermarsh]

Actually, at the point we need it do we do still have it.

[charliermarsh]

I'm working on this, I think it will be a great feature, but it's non-trivial.