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63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
"""Single source of truth for the agent working directory.
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`TERMINAL_CWD` is the runtime carrier for the configured working directory
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(design #19214/#19242: `terminal.cwd` is bridged once to `TERMINAL_CWD` at
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gateway/cron startup). The local-CLI backend deliberately leaves it unset and
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relies on the launch dir. Reading it in one place keeps the system prompt, the
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tool surfaces, and context-file discovery agreeing on where the agent lives.
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Multi-session gateways can pin a logical cwd via the `_SESSION_CWD`
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contextvar; CLI/cron fall through to `TERMINAL_CWD`/launch cwd.
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"""
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import os
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from contextvars import ContextVar, Token
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from pathlib import Path
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from typing import Any
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_UNSET: Any = object()
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_SESSION_CWD: ContextVar = ContextVar("HERMES_SESSION_CWD", default=_UNSET)
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def set_session_cwd(cwd: str | None) -> Token:
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"""Pin the logical cwd for the current context."""
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return _SESSION_CWD.set((cwd or "").strip())
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def clear_session_cwd() -> None:
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_SESSION_CWD.set("")
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def _session_cwd_override() -> str:
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value = _SESSION_CWD.get()
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if value is _UNSET:
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return ""
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return str(value).strip()
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def resolve_agent_cwd() -> Path:
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override = _session_cwd_override()
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if override:
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p = Path(override).expanduser()
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if p.is_dir():
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return p
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raw = os.environ.get("TERMINAL_CWD", "").strip()
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if raw:
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p = Path(raw).expanduser()
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if p.is_dir():
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return p
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return Path(os.getcwd())
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def resolve_context_cwd() -> Path | None:
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# None means "no configured cwd": build_context_files_prompt then falls back
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# to the launch dir (os.getcwd()) — correct for the local CLI. The gateway
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# avoids slurping its install dir by setting TERMINAL_CWD (see system_prompt.py)
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# or, per session, the _SESSION_CWD contextvar above.
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override = _session_cwd_override()
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if override:
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return Path(override).expanduser()
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raw = os.environ.get("TERMINAL_CWD", "").strip()
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return Path(raw).expanduser() if raw else None
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