L0&j&%dZddlmZddlZddlZddlmZgdZejdkZ dd Z dZ dZ dZ dZddZddZddZddZdS)uWindows subprocess compatibility helpers. Hermes is developed on Linux / macOS and tested natively on Windows too. Several common subprocess patterns break silently-or-loudly on Windows: * ``["npm", "install", ...]`` — on Windows ``npm`` is ``npm.cmd``, a batch shim. ``subprocess.Popen(["npm", ...])`` fails with WinError 193 ("not a valid Win32 application") because CreateProcessW can't run a ``.cmd`` file without ``shell=True`` or PATHEXT resolution. * ``start_new_session=True`` — on POSIX, this maps to ``os.setsid()`` and actually detaches the child. On Windows it's silently ignored; the Windows equivalent is ``CREATE_NEW_PROCESS_GROUP | DETACHED_PROCESS`` creationflags, which Python only applies when you pass them explicitly. * Console-window flashes — every ``subprocess.Popen`` of a ``.exe`` on Windows spawns a cmd window briefly unless ``CREATE_NO_WINDOW`` is passed. Cosmetic but jarring for background daemons. This module centralizes the platform-branching logic so the rest of the codebase doesn't sprinkle ``if sys.platform == "win32":`` everywhere. **All helpers are no-ops on non-Windows** — calling them in Linux/macOS code paths is safe by design. That's the "do no damage on POSIX" guarantee. ) annotationsN)Sequence) IS_WINDOWSresolve_node_commandwindows_detach_flags&windows_detach_flags_without_breakawaywindows_hide_flagswindows_detach_popen_kwargswin32namestrargv Sequence[str]return list[str]cBtj|}|r|g|S|g|S)uResolve a Node-ecosystem command name to an absolute-path argv. On Windows, commands like ``npm``, ``npx``, ``yarn``, ``pnpm``, ``playwright``, ``prettier`` ship as ``.cmd`` files (batch shims). ``subprocess.Popen(["npm", "install"])`` fails with WinError 193 because CreateProcessW doesn't execute batch files directly. ``shutil.which(name)`` *does* resolve ``.cmd`` via PATHEXT and returns the fully-qualified path — which CreateProcessW accepts because the extension tells Windows to route through ``cmd.exe /c``. On POSIX ``shutil.which`` also returns a fully-qualified path when found. That's a small change from bare-name resolution (the OS does its own PATH search) but functionally identical and has the side benefit of making the argv reproducible in logs. Behavior when the command is not on PATH: - On Windows: return the bare name — caller can still try with ``shell=True`` as a last resort, OR the subsequent Popen will raise FileNotFoundError with a readable error we want to surface. - On POSIX: same. Bare ``npm`` on a Linux box without npm installed fails the same way it did before this function existed. Args: name: The command name to resolve (``npm``, ``npx``, ``node`` …). argv: The remaining arguments. Must NOT include ``name`` itself — this function builds the full argv list. Returns: A list suitable for passing to subprocess.Popen/run/call. )shutilwhich)r rresolveds B/home/ubuntu/.hermes/hermes-agent/hermes_cli/_subprocess_compat.pyrr4s6@|D!!H! 4  =4=iiiintcRtsdSttztztzS)uReturn Win32 creationflags that detach a child from the parent console and process group. 0 on non-Windows. Pair with ``start_new_session=False`` (default) when calling subprocess.Popen — on POSIX use ``start_new_session=True`` instead, which maps to ``os.setsid()`` in the child. Rationale: - ``CREATE_NEW_PROCESS_GROUP`` — child has its own process group so Ctrl+C in the parent console doesn't propagate. - ``DETACHED_PROCESS`` — child has no console at all. Necessary for background daemons (gateway watchers, update respawners) because without it, closing the console kills the child. - ``CREATE_NO_WINDOW`` — suppress the brief cmd flash that would otherwise appear when launching a console app. Redundant with DETACHED_PROCESS but explicit for clarity. - ``CREATE_BREAKAWAY_FROM_JOB`` — escape any job object the parent is in. Electron (Desktop app) and Tauri (bootstrap installer) wrap their children in job objects; without breakaway, those children die when the parent process exits even if they were spawned with DETACHED_PROCESS. This was the missing flag that made the post-update gateway respawn watcher silently die alongside the Tauri updater after the Electron Desktop's update flow finished. If a process is in a job that disallows breakaway (rare — JOB_OBJECT_LIMIT_BREAKAWAY_OK isn't set), CreateProcess returns ERROR_ACCESS_DENIED. Python surfaces that as ``PermissionError`` on the ``subprocess.Popen`` call. Callers in this codebase already wrap detached spawns in ``try/except OSError`` and fall back to a cmd.exe wrapper, so the breakaway-denied case degrades gracefully rather than crashing. r)r_CREATE_NEW_PROCESS_GROUP_DETACHED_PROCESS_CREATE_NO_WINDOW_CREATE_BREAKAWAY_FROM_JOBrrrrqs4B q!     % %rcBtsdSttztzS)uSame as :func:`windows_detach_flags` minus ``CREATE_BREAKAWAY_FROM_JOB``. The docstring on :func:`windows_detach_flags` notes that a process in a job which disallows breakaway (no ``JOB_OBJECT_LIMIT_BREAKAWAY_OK``) will see ``ERROR_ACCESS_DENIED`` from CreateProcess, surfacing as ``OSError`` (``PermissionError``) on the ``subprocess.Popen`` call. Callers that want to recover — by retrying without the breakaway bit — can pair the two helpers symbolically rather than coding the ``& ~0x01000000`` magic at every site: .. code-block:: python try: subprocess.Popen(argv, creationflags=windows_detach_flags(), …) except OSError: subprocess.Popen( argv, creationflags=windows_detach_flags_without_breakaway(), …, ) See ``gateway_windows.py::_spawn_detached`` for the canonical implementation of this pattern. Returns 0 on non-Windows. r)rrrrrrrrrs#2 q $'8 8;L LLrc"tsdStS)u;Return Win32 creationflags that merely hide the child's console window without detaching the child. 0 on non-Windows. Use for short-lived console apps spawned as part of a larger operation (``taskkill``, ``where``, version probes) where we want no flash but also want to collect stdout/exit code synchronously. The key difference from :func:`windows_detach_flags`: NO ``DETACHED_PROCESS`` — the child still inherits stdio handles so ``capture_output=True`` works. ``DETACHED_PROCESS`` would sever stdio and break stdout capture. r)rrrrrr r s q rdictc8trdtiSddiS)uReturn a dict of Popen kwargs that detach a child on Windows and fall back to the POSIX equivalent (``start_new_session=True``) on Linux/macOS. Usage pattern: .. code-block:: python subprocess.Popen( argv, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, stdin=subprocess.DEVNULL, close_fds=True, **windows_detach_popen_kwargs(), ) This replaces the unsafe-on-Windows pattern: .. code-block:: python subprocess.Popen(..., start_new_session=True) which silently fails to detach on Windows (the flag is accepted but has no effect — the child stays attached to the parent's console and dies when the console closes). creationflagsstart_new_sessionT)rrrrrr r s)89!5!7!788  &&r)r r rrrr)rr)rr")__doc__ __future__rrsystypingr__all__platformrrrrrrrrr r rrrr,s6#"""""    \W $ ####\'(((((VMMMM<$''''''r