c034046735
So even importing `fcntl` causes problems on windows. This PR replaces fcntl with portalocker. Tests all pass, so I think we are good. ref: https://arcade-ai.slack.com/archives/C08K1SJ072S/p1767897850450239?thread_ts=1766186586.406019&cid=C08K1SJ072S <img width="934" height="501" alt="Screenshot 2026-01-08 at 2 57 46 PM" src="https://github.com/user-attachments/assets/1375b6b2-116c-44bd-bbe1-2157dd243d29" /> Closes ENGTOP-8 <!-- CURSOR_SUMMARY --> --- > [!NOTE] > **Cross-platform file locking** > > - Replace `fcntl` with `portalocker` in `arcade_core/usage/identity.py` (shared/exclusive locks); switch to atomic `os.replace()` > - Add `portalocker` dependency and bump `arcade-core` to `4.2.1` > > **Installation/CI** > > - New GitHub Actions workflow `test-install.yml` runs install/CLI checks on macOS, Windows, and Linux for Python 3.10/3.12 > - Add `tests/install/test_install.py` and README to verify install, `arcade` CLI availability, and `portalocker` locking behavior > > <sup>Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit 3fe98fbcbf177f51fdb0b7fc51b20060f7fc85ad. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY --> |
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