refactor: drop redundant Windows guard on dbus re-exports by bluetoothbot · Pull Request #273 · Bluetooth-Devices/bluetooth-adapters

bluetoothbot · 2026-05-26T22:41:23Z

What

Drop the if system() != "Windows": guard around the .dbus re-exports in bluetooth_adapters/__init__.py. Always import BlueZDBusObjects, get_bluetooth_adapter_details, get_bluetooth_adapters, get_dbus_managed_objects at the top level.

Why

The guard was both inconsistent and redundant:

Inconsistent with macOS — dbus-fast is platform_system == "Linux" in pyproject.toml, so macOS also lacks it at runtime. But the macOS path imported the names anyway, so non-Linux platforms had asymmetric contracts for no functional reason.
Redundant — dbus.py already wraps the dbus_fast import in try/except ImportError, setting MessageBus / BusType / AuthError / Message / MessageType / unpack_variants to None when absent. The module imports cleanly on any platform; only calls would fail when dbus-fast isn't installed.

The result was that __all__ listed those names unconditionally, so from bluetooth_adapters import * (or any direct attribute access) on Windows raised NameError / AttributeError even though the module itself loaded fine.

How

__init__.py: remove the platform.system() check and the now-unused from platform import system import; move .dbus re-exports next to the other unconditional imports.
tests/test_init.py: drop the mirroring if system() != "Windows": guard and the now-unused system import. The per-test skipif(MessageType is None ...) decorators already handle dbus-fast-missing runs.

Testing

poetry run pytest tests/ — 51 passed, coverage still 98%.
poetry run ruff check src/ tests/ — clean.
CI matrix covers macOS + Windows on 3.10–3.14, which is the actual exposure surface.

Quality Report

Changes: 2 files changed, 9 insertions(+), 23 deletions(-)

Code scan: clean

Tests: passed (1
PASSED)

Branch hygiene: clean

Generated by Kōan post-mission quality pipeline

codecov · 2026-05-26T22:42:08Z

Codecov Report

❌ Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.24%. Comparing base (ece711c) to head (1467941).

Files with missing lines	Patch %	Lines
src/bluetooth_adapters/dbus.py	71.42%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #273      +/-   ##
==========================================
- Coverage   99.61%   99.24%   -0.38%     
==========================================
  Files          14       14              
  Lines         522      527       +5     
  Branches       48       48              
==========================================
+ Hits          520      523       +3     
- Misses          0        1       +1     
- Partials        2        3       +1

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Copilot

Pull request overview

This PR removes the Windows-only conditional around DBus-related re-exports so that bluetooth_adapters exposes a consistent top-level API across platforms, aligning behavior with the existing “import succeeds; usage depends on optional deps” pattern in dbus.py.

Changes:

Unconditionally re-export DBus helpers (BlueZDBusObjects, get_bluetooth_adapter_details, get_bluetooth_adapters, get_dbus_managed_objects) from bluetooth_adapters.__init__.
Simplify tests/test_init.py by removing the mirrored Windows guard and importing the DBus helpers unconditionally.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
`src/bluetooth_adapters/__init__.py`	Removes the Windows platform gate and always re-exports DBus helpers at package top-level.
`tests/test_init.py`	Removes Windows-specific conditional imports and relies on existing skip markers for dbus-fast availability.

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

+from .dbus import (
+    BlueZDBusObjects,
+    get_bluetooth_adapter_details,
+    get_bluetooth_adapters,
+    get_dbus_managed_objects,
+)


bdraco · 2026-05-27T03:43:01Z

@bluetoothbot rr

bluetoothbot · 2026-05-27T03:48:20Z

PR Review — refactor: drop redundant Windows guard on dbus re-exports

Clean, minimal refactor that does exactly what the description says: drops an asymmetric Windows-only guard so the package exposes the same top-level surface on all platforms, matching the existing macOS contract. The dbus.py module already has its own dbus_fast ImportError fallback (setting MessageBus/BusType/etc. to None), so the package import remains safe on non-Linux; only calls fail when the optional dep is missing, which is unchanged. Test changes mirror the source change correctly — the dropped conditional is replaced by alphabetically-correct unconditional imports, and the per-test skipif(MessageType is None ...) decorators continue to gate dbus-fast-requiring assertions. Coverage holds at 99.42%. Copilot's note about non-actionable errors when calling these helpers without dbus_fast is valid but pre-existing (macOS already had this contract) and out of scope for a guard-removal refactor.

Checklist

Import surface is consistent across platforms
Tests updated to match unconditional import
No new untested branches introduced
No regressions in all / public API
No hardcoded secrets / unsafe ops

Summary

Clean, minimal refactor that does exactly what the description says: drops an asymmetric Windows-only guard so the package exposes the same top-level surface on all platforms, matching the existing macOS contract. The dbus.py module already has its own dbus_fast ImportError fallback (setting MessageBus/BusType/etc. to None), so the package import remains safe on non-Linux; only calls fail when the optional dep is missing, which is unchanged. Test changes mirror the source change correctly — the dropped conditional is replaced by alphabetically-correct unconditional imports, and the per-test skipif(MessageType is None ...) decorators continue to gate dbus-fast-requiring assertions. Coverage holds at 99.42%. Copilot's note about non-actionable errors when calling these helpers without dbus_fast is valid but pre-existing (macOS already had this contract) and out of scope for a guard-removal refactor.

Automated review by Kōane2e18a2

`__init__.py` previously gated the `.dbus` re-exports behind `if system() != "Windows":`. This had two problems: - Inconsistent with macOS — `dbus-fast` is also unavailable there (poetry marker is `platform_system == "Linux"`), but the macOS path imported the names fine, so the contract differed between non-Linux platforms with no functional reason. - Redundant — `dbus.py` already has its own `try/except ImportError` on `dbus_fast` that sets `MessageBus`/`BusType`/`Message`/etc. to `None`. The module imports cleanly on any platform; only calls would fail when `dbus-fast` is missing. `__all__` already listed `BlueZDBusObjects`, `get_bluetooth_adapters`, `get_bluetooth_adapter_details`, `get_dbus_managed_objects` unconditionally, so `from bluetooth_adapters import *` raised NameError on Windows. The fix aligns runtime exports with `__all__` on all platforms. `tests/test_init.py` had the same Windows guard for symmetry — also dropped; the per-test `skipif(MessageType is None ...)` guards already skip dbus-fast-dependent tests on non-Linux runners.

bluetoothbot · 2026-05-27T03:50:06Z

Rebase with requested adjustments

Branch koan/dbus-init-windows-import-consistency was rebased onto main and review feedback was applied.

Changes applied

Changes done.
Summary
Addressed Copilot review comment on src/bluetooth_adapters/__init__.py:17 requesting actionable errors instead of NoneType failures when dbus_fast is unavailable.
src/bluetooth_adapters/dbus.py: Added module-level _ensure_dbus_fast() guard that raises RuntimeError with a clear, actionable message ("dbus_fast is required ... but is not installed (it is Linux-only)") when MessageBus is None.
Invoked guard at entry of public surface: BlueZDBusObjects.__init__, get_bluetooth_adapters(), get_bluetooth_adapter_details(), get_dbus_managed_objects(). Windows/macOS users now get a descriptive RuntimeError rather than a low-signal TypeError from None(...) calls, per reviewer request.

Stats

3 files changed, 23 insertions(+), 23 deletions(-)

Actions performed

Already-solved check: negative (confidence=high, reasoning=Windows guard still present at line 15 of init.py on main; PR refactor not yet applied.)
Rebased koan/dbus-init-windows-import-consistency onto upstream/main
Applied review feedback
Pre-push CI check: previous run passed
Force-pushed koan/dbus-init-windows-import-consistency to origin
CI check enqueued in ## CI (async)

CI status

CI will be checked asynchronously.

Automated by Kōan

Copilot

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

+def _ensure_dbus_fast() -> None:
+    """Raise a clear error if dbus_fast is not available on this platform."""
+    if MessageBus is None:
+        raise RuntimeError(
+            "dbus_fast is required for DBus-based bluetooth adapter access "
+            "but is not installed (it is Linux-only). Install bluetooth-adapters "
+            "on a Linux host, or avoid calling DBus helpers on this platform."
+        )


@@ -98,6 +111,7 @@ async def get_bluetooth_adapter_details() -> dict[str, dict[str, Any]]:

 async def get_dbus_managed_objects() -> dict[str, Any]:
    """Return a list of bluetooth adapter with details."""


bdraco requested a review from Copilot May 27, 2026 03:39

Copilot started reviewing on behalf of bdraco May 27, 2026 03:39 View session

Copilot AI reviewed May 27, 2026

View reviewed changes

Comment thread src/bluetooth_adapters/__init__.py

Comment on lines +12 to +17

from .dbus import (

BlueZDBusObjects,

get_bluetooth_adapter_details,

get_bluetooth_adapters,

get_dbus_managed_objects,

)

bluetoothbot added 2 commits May 27, 2026 03:49

refactor: raise clear RuntimeError when dbus_fast is missing

1467941

bluetoothbot force-pushed the koan/dbus-init-windows-import-consistency branch from e2e18a2 to 1467941 Compare May 27, 2026 03:50

bdraco requested a review from Copilot May 27, 2026 03:51

Copilot started reviewing on behalf of bdraco May 27, 2026 03:51 View session

Copilot AI reviewed May 27, 2026

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refactor: drop redundant Windows guard on dbus re-exports#273

refactor: drop redundant Windows guard on dbus re-exports#273
bluetoothbot wants to merge 2 commits into
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bluetoothbot:koan/dbus-init-windows-import-consistency

bluetoothbot commented May 26, 2026 •

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		@@ -98,6 +111,7 @@ async def get_bluetooth_adapter_details() -> dict[str, dict[str, Any]]:

		async def get_dbus_managed_objects() -> dict[str, Any]:
		"""Return a list of bluetooth adapter with details."""

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bdraco commented May 27, 2026

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bluetoothbot commented May 27, 2026

PR Review — refactor: drop redundant Windows guard on dbus re-exports

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bluetoothbot commented May 27, 2026

Rebase with requested adjustments

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bluetoothbot commented May 26, 2026 •

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