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hermes-agent/tests
Austin Pickett 394cdf48ce fix(logging): alias RotatingFileHandler to concurrent-log-handler (salvage #44921) (#46794)
* fix(logging): alias RotatingFileHandler to concurrent-log-handler

On Windows, stdlib RotatingFileHandler.doRollover() uses os.rename(), which
fails with PermissionError [WinError 32] whenever another process holds an
append-mode handle on agent.log — essentially always in Hermes (TUI, gateway,
hy_memory server, MCP servers, and on-demand CLI commands all log from separate
processes). This pinned agent.log at the 5 MiB threshold and spammed stderr
with a traceback on every emit (#44873).

Add concurrent-log-handler==0.9.29 as a core dep and alias its
ConcurrentRotatingFileHandler as RotatingFileHandler in hermes_logging.py. It
wraps the rename in a cross-process file lock (via portalocker: pywin32 on
Windows, fcntl on POSIX) so only one process rotates at a time. Aliasing keeps
every existing isinstance/class-declaration reference working unchanged.

Co-authored-by: tuancookiez-hub <tuancookiez@gmail.com>

* fix(logging): gate concurrent-log-handler swap to Windows only

The initial salvage aliased RotatingFileHandler -> ConcurrentRotatingFileHandler
unconditionally, which regressed POSIX: CLH opens lazily and rotates via its own
lock path, breaking managed-mode (NixOS) group-writable perms and eager file
creation that _ManagedRotatingFileHandler depends on. CI caught it as 2 failures
in test_managed_mode_*_group_writable on Linux.

The WinError 32 bug (#44873) is Windows-specific — POSIX renames an open file
fine, so stdlib already works on Linux/macOS. Gate the swap behind
sys.platform == 'win32': Windows uses CLH, POSIX keeps stdlib RotatingFileHandler.

- hermes_logging.py: platform-conditional import.
- tests/test_hermes_logging.py: import RotatingFileHandler from hermes_logging
  (single source of truth) so the autouse fixture's isinstance checks match the
  real handler class on both platforms.
- pyproject.toml/uv.lock: mark the dep 'sys_platform == "win32"' so portalocker
  /pywin32 only ship where used.

---------

Co-authored-by: tuancookiez-hub <tuancookiez@gmail.com>
Co-authored-by: Teknium <127238744+teknium1@users.noreply.github.com>
2026-06-17 15:39:04 -05:00
..
2026-06-15 06:29:00 -07:00