subdependencies resolution gets stuck indefinitely with this pyproject.toml

[omars44]

• I have searched the issue tracker and believe that this is not a duplicate.

I'm not entirely sure what is the cause, but I can say just by observation that this type of dependency declaration is the culprit

dependencies = [
    'PySide6'
]

While this one works normally:

dependencies = [
    "PySide6>=6.4.2",
]

Steps taken to work-around the issue:

pdm remove PySide6
pdm add PySide6

Steps to reproduce

Using a project without a lock file with the following pyproject.toml

pdm config python.use_venv false
pdm install

pyproject.toml

[project]
name = 'example'
dynamic = ['version']
description = ''
authors = [
    {name = 'User', email = 'user@example.com'},
]
dependencies = [
    'PySide6'
]
requires-python = '>=3.9,<3.10'
license = {text = 'MIT'}

[project.optional-dependencies]
dev = [
    'mkdocs-material',
    'mkdocstrings',
    'mkdocstrings-python',
    'mkdocs-git-revision-date-plugin',
    'bump2version',
    'build'
]

[build-system]
requires = ['pdm-pep517']
build-backend = 'pdm.pep517.api'

[project.scripts]
pdm = 'pdm.core:main'

[tool.coverage.run]
branch = true
parallel = true
omit = [
  'example/__about__.py',
]

[tool.coverage.report]
exclude_lines = [
  'no cov',
  'if __name__ == .__main__.:',
  'if TYPE_CHECKING:',
]

[tool.mypy]
disallow_untyped_calls = true
disallow_untyped_defs = true
disallow_incomplete_defs = true
check_untyped_defs = true
disallow_subclassing_any = true
warn_no_return = true
strict_optional = true
no_implicit_optional = true
disallow_any_generics = true
disallow_any_unimported = true
warn_redundant_casts = true
warn_unused_configs = true
show_traceback = true
always_true = 'MYPYC'


[tool.pytest]
testpaths='tests/'

Actual behavior

stuck Resolving PySide6

Expected behavior

installing the dependencies and producing a lock file

Environment Information

pdm info && pdm info --env
PDM version:
  2.4.5
Python Interpreter:
  /usr/bin/python3 (3.9)
Project Root:
  /home/user/dev/python/example-cookiecutter/example
Project Packages:
  /home/user/dev/python/example-cookiecutter/example/__pypackages__/3.9
{
  "implementation_name": "cpython",
  "implementation_version": "3.9.2",
  "os_name": "posix",
  "platform_machine": "x86_64",
  "platform_release": "5.10.0-21-rt-amd64",
  "platform_system": "Linux",
  "platform_version": "#1 SMP PREEMPT_RT Debian 5.10.162-1 (2023-01-21)",
  "python_full_version": "3.9.2",
  "platform_python_implementation": "CPython",
  "python_version": "3.9",
  "sys_platform": "linux"
}

[frostming]

I can't reproduce this using Python 3.10 on macOS. Adding -v option to show the verbose output may help identify what is blocking.

There are some weirdness in your pyproject.toml

1. You specified dynamic = ["version"] but there is no tool.pdm.version table.
2. You seems to copy project.scripts section from pdm but it doesn't exist in your project.