Error on Windows install in GitHub actions

[j-adamczyk]

We are migrating from https://github.com/tiangolo/poetry-version-plugin to https://github.com/mtkennerly/poetry-dynamic-versioning for scikit-fingerprints (https://github.com/scikit-fingerprints/scikit-fingerprints). This Poetry plugin relies on dunamai, but fails on GitHub Actions during Windows installation, with error:

Run poetry sync --with test
Creating virtualenv skfp in D:\a\scikit-fingerprints\scikit-fingerprints\.venv
Ensuring that the Poetry plugins required by the project are available...
The following Poetry plugins are required by the project but are not installed in Poetry's environment:
  - poetry-dynamic-versioning[plugin] (>=1.0.0,<2.0.0)
Installing Poetry plugins only for the current project...
Updating dependencies
Resolving dependencies...

Package operations: 4 installs, 0 updates, 0 removals

  - Installing markupsafe (3.0.2)
  - Installing dunamai (1.23.0)
  - Installing jinja2 (3.1.5)

  ValueError

  path is on mount 'C:', start on mount 'D:'

  at <frozen ntpath>:766 in relpath

Cannot install dunamai.


Failed to install required Poetry plugins
Error: Process completed with exit code 1.

Full log: https://github.com/scikit-fingerprints/scikit-fingerprints/actions/runs/12736416081/job/35496372898?pr=346.
Workflow definition: https://github.com/scikit-fingerprints/scikit-fingerprints/blob/eaa1499a12db49e128808f920df61d8004ef396e/.github/workflows/python-publish.yml.
pyproject.toml file: https://github.com/scikit-fingerprints/scikit-fingerprints/blob/eaa1499a12db49e128808f920df61d8004ef396e/pyproject.toml.

[mtkennerly]

Hi! This sounds like an issue in Poetry itself. Could you please add -vvv to the Poetry command and post the full output here?

It looks like Poetry may need a fix related to this:

https://docs.python.org/3/library/os.path.html#os.path.relpath

On Windows, ValueError is raised when path and start are on different drives.

Once you have the -vvv output, I would recommend opening a ticket in the Poetry repo with the details.

[j-adamczyk]

@mtkennerly sure, here is the debug log: https://github.com/scikit-fingerprints/scikit-fingerprints/actions/runs/12743574960/job/35513793864?pr=346. As far as I can tell, the problem is that Poetry venv gets created on D partition, but cache is on C one.

[mtkennerly]

Looks like someone else recently opened a ticket for the same issue: python-poetry/poetry#10028

[j-adamczyk]

Thanks for fast responses and help :)