Pydantic 2.0 (complete rewrite) breaks copier

[henryiii]

Describe the problem

After over a year and two PyCons, the Rust rewrite of Pydandic with 17x+ speedup (last I heard maybe it was 23x?) is out (four hours ago)! Unfortunately, it breaks copier. As much as I hate suggesting it, you might want to do a quick patch release with a version cap, then work on making it work (Unless it's really easy to fix, of course, which it might be).

Also, it's a really bad idea to use things from dependencies that start with underscores. Just saying. :P

(They did an incredible amount of work to try to make sure they didn't break users. Users importing underscore objects doesn't count!)

Template

https://github.com/scientific-python/cookie

(If you want one, that is - you can't even start copier on a fresh install)

To Reproduce

Run copier.

That's all.

Logs

  File "/home/runner/work/cookie/cookie/.nox/compare_copier/bin/copier", line 5, in <module>
    from copier.__main__ import copier_app_run
  File "/home/runner/work/cookie/cookie/.nox/compare_copier/lib/python3.8/site-packages/copier/__init__.py", line 6, in <module>
    from .main import *  # noqa: F401,F403
  File "/home/runner/work/cookie/cookie/.nox/compare_copier/lib/python3.8/site-packages/copier/main.py", line 29, in <module>
    from .errors import (
  File "/home/runner/work/cookie/cookie/.nox/compare_copier/lib/python3.8/site-packages/copier/errors.py", line 6, in <module>
    from pydantic.errors import _PathValueError
ImportError: cannot import name '_PathValueError' from 'pydantic.errors' (/home/runner/work/cookie/cookie/.nox/compare_copier/lib/python3.8/site-packages/pydantic/errors.py)

Expected behavior

Not to break when pydantic is installed, or not to install pedantic 2.0.

Screenshots/screencasts/logs

No response

Operating system

macOS

Operating system distribution and version

Any

Copier version

8.0.0

Python version

All

Installation method

pipx+pypi

Additional context

Broken logs at https://github.com/scientific-python/cookie/actions/runs/5426746583/jobs/9869183393

[luismata01]

Hi
I have the same problem use this ti install copier on Doodba copier template

Traceback (most recent call last):
File "/home/luis/.local/bin/copier", line 5, in
from copier.main import copier_app_run
File "/home/luis/.local/pipx/venvs/copier/lib/python3.8/site-packages/copier/init.py", line 6, in
from .main import * # noqa: F401,F403
File "/home/luis/.local/pipx/venvs/copier/lib/python3.8/site-packages/copier/main.py", line 29, in
from .errors import (
File "/home/luis/.local/pipx/venvs/copier/lib/python3.8/site-packages/copier/errors.py", line 6, in
from pydantic.errors import _PathValueError
ImportError: cannot import name '_PathValueError' from 'pydantic.errors' (/home/luis/.local/pipx/venvs/copier/lib/python3.8/site-packages/pydantic/errors.py

Tecnativa/doodba-copier-template#392 (comment)

Can you help me please

[sisp]

As a temporary workaround until we've fixed this problem, please override the installed version of Pydantic in your virtual environment where Copier is installed:

• With pip:

  pip install -U 'pydantic<2'

• With pipx:

  pipx inject copier 'pydantic<2'

• With poetry:

  poetry add 'pydantic@<2'

Sorry for the inconvenience.

[luismata01]

Member
Thank's for your support

This solution work form me using
pipx inject copier 'pydantic<2'

Thanks

[roestzwiee]

Hi,
for those who have a dependency to copier v7, will there also be a fix for copier 7.2?

[henryiii]

for those who have a dependency to copier v7, will there also be a fix for copier 7.2?

#1229 (comment) seems to indicate that might happen.

[yajo]

You can enter a shell

As much as I hate suggesting it, you might want to do a quick patch release with a version cap, then work on making it work

See #1244.

[yajo]

FWIW you can enter a shell with a perfectly installable Copier doing:

nix shell github:copier-org/copier/v8.0.0

Change that last part for the tag you want.