65 lines
2.1 KiB
Python
65 lines
2.1 KiB
Python
"""Atomic environment persistence and the one-time WebSocket default migration."""
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import os
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from pathlib import Path
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import tempfile
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from dotenv import dotenv_values
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from filelock import FileLock
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TRANSPORT_DEFAULT_VERSION_KEY = "ARTEMIS_TRANSPORT_DEFAULT_VERSION"
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def _lock(path: Path) -> FileLock:
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path.parent.mkdir(parents=True, exist_ok=True)
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return FileLock(str(path) + ".artemis.lock", timeout=5)
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def _write(path: Path, values: dict[str, str]) -> None:
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original = path.read_text(encoding="utf-8") if path.exists() else ""
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kept = [
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line
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for line in original.splitlines()
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if line.strip().removeprefix("export ").split("=", 1)[0].strip() not in values
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]
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for key, value in values.items():
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escaped = value.replace("\\", "\\\\").replace("'", "\\'")
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kept.append(f"{key}='{escaped}'")
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fd, temp_name = tempfile.mkstemp(prefix=".env-", dir=path.parent)
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try:
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with os.fdopen(fd, "w", encoding="utf-8", newline="\n") as stream:
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stream.write("\n".join(kept) + "\n")
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stream.flush()
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os.fsync(stream.fileno())
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os.replace(temp_name, path)
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finally:
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Path(temp_name).unlink(missing_ok=True)
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def persist_environment(path: Path, values: dict[str, str]) -> None:
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with _lock(path):
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_write(path, values)
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os.environ.update(values)
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def _transport_default_is_current(path: Path) -> bool:
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saved = dotenv_values(path, interpolate=False) if path.exists() else {}
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try:
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return int(saved.get(TRANSPORT_DEFAULT_VERSION_KEY) or "0") >= 1
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except ValueError:
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return False
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def migrate_transport_default(path: Path) -> bool:
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"""Migrate unversioned HTTP preferences once, preserving later opt-outs."""
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# Completed migrations need no write access, including read-only deployments.
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if _transport_default_is_current(path):
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return False
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with _lock(path):
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if _transport_default_is_current(path):
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return False
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values = {"OPENAI_TRANSPORT": "websocket", TRANSPORT_DEFAULT_VERSION_KEY: "1"}
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_write(path, values)
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os.environ.update(values)
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return True
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