This directory cross-builds a small Windows exec-server fixture and runs it under a pinned Wine runtime from x86-64 Linux Bazel. The Windows fixture links only codex-exec-server because the full Codex Windows graph does not yet cross-build, and the smaller target is faster to iterate on. The direct smoke test runs pinned PowerShell and built-in cmd.exe through the real exec-server with Windows cwd URI values.

Running the test

bazel test \
  //codex-rs/core/tests/remote_env_windows:smoke-test \
  --test_output=errors

The full cross-OS flow uses a real Linux app-server for two turns against the same Windows exec-server:

bazel test \
  //codex-rs/core/tests/remote_env_windows:wine-app-server-windows-exec-server-test \
  --test_output=errors

No system Wine or apt packages are required. The target is intentionally limited to x86-64 for simplicity, so Bazel marks it incompatible elsewhere. Every process gets a fresh WINEPREFIX and isolated wineserver.

The reusable rules and Rust harness live under //bazel/rules/testing. Tests resolve their Windows executable with codex_utils_cargo_bin::cargo_bin, then use WineTestProcess::scope for async teardown and panic-safe cleanup.

Current limitations

ConPTY/TTY behavior is not yet covered.
Wine loads shared objects and PE DLLs at runtime, so the host must still provide the declared compatible glibc version.
ARM64 Linux is intentionally unsupported for now. It is more complicated to support, and the behavior covered here should not vary by architecture.