Poetry ignores some transitive dependencies for the project

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Debian 8.11, ArchLinux
• Poetry version: 0.12.17, 1.0.0b1
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/ffix/5ccc5e3f84ff188f3831392a03fc4a39

Issue

It looks like Poetry ignores some transitive dependencies for the project. For example, it ignores bz2file as a dependency for the smart-open package:

$ pip check
smart-open 1.8.4 requires bz2file, which is not installed.

But dependency specified in setup.py. Full debug log is here: https://gist.github.com/ffix/77d153f8483dde2ded4dde3e35f64bfb

Another example is scikit-image:

$ pip check
scikit-image 0.13.1 requires matplotlib, which is not installed.
scikit-image 0.13.1 requires pywavelets, which is not installed.

[absassi]

@hyacz I just reported the PyInstaller issue (pyinstaller/pyinstaller#4609), as the actual cause is conditional code to define requirements in their setup.py, instead of using PEP 508 markers.

I don’t think it is possible for Poetry to evaluate all possible branches in a setup.py that try to do “clever” things.

[hyacz]

Noticed the same issue with: pyinstaller 3.5 requires macholib, which is not installed.

OS: macOS 10.15.1 (19B88) Poetry version: 0.12.17

pyproject.toml

[tool.poetry]
name = "poetry-demo"
version = "0.1.0"
description = ""
authors = ["Haohao Zhang <[e-mail]>"]

[tool.poetry.dependencies]
python = "^3.7"

[tool.poetry.dev-dependencies]
pyinstaller = "^3.5"

[build-system]
requires = ["poetry>=0.12"]
build-backend = "poetry.masonry.api"

> poetry install
...

> poetry show --tree
pyinstaller 3.5 PyInstaller bundles a Python application and all its dependencies into a single package.
├── altgraph *
└── setuptools *

> poetry run pip check         
pyinstaller 3.5 requires macholib, which is not installed.

> poetry run pyinstaller --help               
Traceback (most recent call last):
  File "/Users/hyacz/Library/Caches/pypoetry/virtualenvs/poetry-demo-py3.7/bin/pyinstaller", line 10, in <module>
    sys.exit(run())
  File "/Users/hyacz/Library/Caches/pypoetry/virtualenvs/poetry-demo-py3.7/lib/python3.7/site-packages/PyInstaller/__main__.py", line 79, in run
    import PyInstaller.building.build_main
  File "/Users/hyacz/Library/Caches/pypoetry/virtualenvs/poetry-demo-py3.7/lib/python3.7/site-packages/PyInstaller/building/build_main.py", line 34, in <module>
    from ..depend import bindepend
  File "/Users/hyacz/Library/Caches/pypoetry/virtualenvs/poetry-demo-py3.7/lib/python3.7/site-packages/PyInstaller/depend/bindepend.py", line 28, in <module>
    from . import dylib, utils
  File "/Users/hyacz/Library/Caches/pypoetry/virtualenvs/poetry-demo-py3.7/lib/python3.7/site-packages/PyInstaller/depend/dylib.py", line 197, in <module>
    from macholib import util
ModuleNotFoundError: No module named 'macholib'