feat: Make generate_clients.py windows compatible

[MonkeyCanCode]

This PR is to added windows support for python cli (#3051).

Here are some sample output:

Poetry install:

(venv) PS C:\Users\Yong\Desktop\test\polaris-main\polaris-main\client\python> poetry install --all-extras
Installing dependencies from lock file

No dependencies to install or update

Installing the current project: apache-polaris (1.2.0)Preparing build environment with build-system requirements poetry-core==2.2.1, openapi-generator-cli==7.12.0
Preparing spec directory...
Copying spec directory from C:\Users\Yong\Desktop\test\polaris-main\polaris-main\spec to C:\Users\Yong\Desktop\test\polaris-main\polaris-main\client\python\spec
Spec directory copied to ensure it is up-to-date.
Deleting old tests...
Old test deletion complete.
Fixing catalog models __init__.py...
Catalog models __init__.py fixed.
Re-applying license headers...
License fix complete.
Installing the current project: apache-polaris (1.2.0)

(venv) PS C:\Users\Yong\Desktop\test\polaris-main\polaris-main\client\python> polaris
...
Exception: Please provide credentials via either --client-id & --client-secret or --access-token. Alternatively, you may set the environment variables CLIENT_ID & CLIENT_SECRET.

Poetry build:

(venv) PS C:\Users\Yong\Desktop\test\polaris-main\polaris-main\client\python> poetry build
Building apache-polaris (1.2.0)
Building sdist
Building wheel
(venv) PS C:\Users\Yong\Desktop\test\polaris-main\polaris-main\client\python\dist> ls


    Directory: C:\Users\Yong\Desktop\test\polaris-main\polaris-main\client\python\dist


Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----        11/19/2025  12:26 AM         548278 apache_polaris-1.2.0-cp310-cp310-win_amd64.whl
-a----        11/19/2025  12:26 AM         233088 apache_polaris-1.2.0.tar.gz

Install whl from poetry build:

(venv) PS C:\Users\Yong\Desktop\test\test_pkg> pip install C:\Users\Yong\Desktop\test\polaris-main\polaris-main\client\python\dist\apache_polaris-1.2.0-cp310-cp310-win_amd64.whl
Processing c:\users\Yong\desktop\test\polaris-main\polaris-main\client\python\dist\apache_polaris-1.2.0-cp310-cp310-win_amd64.whl
...
Installing collected packages: six, urllib3, python-dateutil, jmespath, typing-extensions, botocore, typing-inspection, s3transfer, pydantic-core, annotated-types, pydantic, boto3, apache-polaris
Successfully installed annotated-types-0.7.0 apache-polaris-1.2.0 boto3-1.40.76 botocore-1.40.76 jmespath-1.0.1 pydantic-2.11.10 pydantic-core-2.33.2 python-dateutil-2.9.0.post0 s3transfer-0.14.0 six-1.17.0 typing-extensions-4.15.0 typing-inspection-0.4.2 urllib3-2.5.0
...
(venv) PS C:\Users\Yong\Desktop\test\test_pkg> polaris
...
Exception: Please provide credentials via either --client-id & --client-secret or --access-token. Alternatively, you may set the environment variables CLIENT_ID & CLIENT_SECRET.

Install sdist from poetry build:

(venv) PS C:\Users\Yong\Desktop\test\test_dist> pip install C:\Users\Yong\Desktop\test\polaris-main\polaris-main\client\python\dist\apache_polaris-1.2.0.tar.gz
Processing c:\users\Yong\desktop\test\polaris-main\polaris-main\client\python\dist\apache_polaris-1.2.0.tar.gz
...
Successfully built apache-polaris
Installing collected packages: six, urllib3, python-dateutil, jmespath, typing-extensions, botocore, typing-inspection, s3transfer, pydantic-core, annotated-types, pydantic, boto3, apache-polaris
Successfully installed annotated-types-0.7.0 apache-polaris-1.2.0 boto3-1.40.76 botocore-1.40.76 jmespath-1.0.1 pydantic-2.11.10 pydantic-core-2.33.2 python-dateutil-2.9.0.post0 s3transfer-0.14.0 six-1.17.0 typing-extensions-4.15.0 typing-inspection-0.4.2 urllib3-2.5.0
...
(venv) PS C:\Users\Yong\Desktop\test\test_dist> polaris
...
Exception: Please provide credentials via either --client-id & --client-secret or --access-token. Alternatively, you may set the environment variables CLIENT_ID & CLIENT_SECRET.

Checklist

• 🛡️ Don't disclose security issues! (contact security@apache.org)
• 🔗 Clearly explained why the changes are needed, or linked related issues: Fixes #
• 🧪 Added/updated tests with good coverage, or manually tested (and explained how)
• 💡 Added comments for complex logic
• 🧾 Updated CHANGELOG.md (if needed)
• 📚 Updated documentation in site/content/in-dev/unreleased (if needed)

[snazy]

I don't mind making the Python part buildable on Win at all, which might be a requirement for cmake and/or testing against Win?
"Polaris itself" however can only be built on Linux or macOS.

[MonkeyCanCode]

That is correct. I think the ask is for ensure on windows, people can do pip install and be able to integrate with Polaris with CLI.

I don't mind making the Python part buildable on Win at all, which might be a requirement for cmake and/or testing against Win?
"Polaris itself" however can only be built on Linux or macOS.

[HonahX]

This is great! Thanks for the quick fix here.

Yes, the goal here is just to ensure windows user can install Polaris CLI.

[MonkeyCanCode]

@snazy any concerns before this merge? I think we are all on the same page.

This is great! Thanks for the quick fix here.

Yes, the goal here is just to ensure windows user can install Polaris CLI.

[snazy]

Nah, no concerns from my side. It was just a question and note.