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"""Platform-specific paths and tool resolution for meshbay-node."""
import asyncio
import os
import shutil
import sys
from pathlib import Path
# ── Console ──────────────────────────────────────────────────────────────────
def force_utf8_stdio() -> None:
"""
Make stdout/stderr UTF-8. A Windows console is cp1252 by default, so any
``print()`` carrying a character outside it — the ``->`` arrows and em
dashes the CLI help and messages are full of — raises UnicodeEncodeError
and takes the command down with it. No effect where the streams are
already UTF-8 or cannot be reconfigured.
"""
for stream in (sys.stdout, sys.stderr):
try:
stream.reconfigure(encoding="utf-8")
except (AttributeError, ValueError, OSError):
pass
# ── Event loop ───────────────────────────────────────────────────────────────
def use_compatible_event_loop() -> None:
"""
On Windows, select the SelectorEventLoop: aiortc's ICE stack does not
complete a loopback DataChannel handshake on the default ProactorEventLoop.
Cost: SelectorEventLoop cannot spawn subprocesses on Windows, so ffmpeg
streaming (asyncio.create_subprocess_exec in webrtc_server.py) does not work
under it. The video path needs a thread-based runner on Windows — tracked
for the port. No effect off Windows.
Whether the hang is real for a live peer (vs. the same-process loopback in
the tests) is still being established: set MESHBAY_NODE_EVENT_LOOP=proactor
to keep the default loop and check.
"""
if sys.platform != "win32":
return
if os.environ.get("MESHBAY_NODE_EVENT_LOOP", "").lower() == "proactor":
return
asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
# ── Directories ──────────────────────────────────────────────────────────────
def config_dir() -> Path:
if sys.platform == "win32":
return Path(os.environ.get("LOCALAPPDATA") or Path.home()) / "meshbay"
return Path.home() / ".config" / "meshbay"
def data_dir() -> Path:
if sys.platform == "win32":
return Path(os.environ.get("LOCALAPPDATA") or Path.home()) / "meshbay" / "data"
return Path.home() / ".local" / "share" / "meshbay"
def state_dir() -> Path:
if sys.platform == "win32":
return Path(os.environ.get("LOCALAPPDATA") or Path.home()) / "meshbay" / "state"
return Path.home() / ".local" / "state" / "meshbay"
# ── File permissions ─────────────────────────────────────────────────────────
def chmod_private(path: Path, *, mode: int = 0o600) -> None:
"""Set restrictive permissions on a file. No-op on Windows (NTFS ignores mode bits)."""
if sys.platform != "win32":
path.chmod(mode)
# ── Media tools ──────────────────────────────────────────────────────────────
_ffmpeg_path: str = "ffmpeg"
_ffprobe_path: str = "ffprobe"
def check_media_tools(
ffmpeg: str = "ffmpeg", ffprobe: str = "ffprobe",
) -> None:
"""Resolve ffmpeg/ffprobe at daemon startup. Raises RuntimeError if not found."""
global _ffmpeg_path, _ffprobe_path
resolved = shutil.which(ffmpeg)
if not resolved:
raise RuntimeError(
f"{ffmpeg!r} not found in PATH. "
"Install ffmpeg or set [node] ffmpeg_path in node.toml."
)
_ffmpeg_path = resolved
resolved = shutil.which(ffprobe)
if not resolved:
raise RuntimeError(
f"{ffprobe!r} not found in PATH. "
"Install ffmpeg or set [node] ffprobe_path in node.toml."
)
_ffprobe_path = resolved
def ffmpeg_cmd() -> str:
return _ffmpeg_path
def ffprobe_cmd() -> str:
return _ffprobe_path
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