Import AITURK IDE 1.0.0-beta.1 from Hermes 63279301; preserve MIT license

gateway/cwd_placeholder.py

@@ -0,0 +1,49 @@
+"""Resolve gateway ``terminal.cwd`` placeholder values to ``TERMINAL_CWD``.
+
+When ``terminal.cwd`` is unset or a placeholder (``.``, ``auto``, ``cwd``),
+the gateway must not blindly map host ``Path.home()`` into container backends.
+Docker with workspace mounting still needs an explicit host path signal
+(``MESSAGING_CWD`` or an absolute config path) for ``terminal_tool`` to map
+``/host/project`` → ``/workspace``.
+"""
+
+from __future__ import annotations
+
+CWD_PLACEHOLDERS = frozenset({".", "auto", "cwd"})
+
+
+def _truthy_env(value: str | None) -> bool:
+    return (value or "").strip().lower() in {"true", "1", "yes"}
+
+
+def resolve_placeholder_terminal_cwd(
+    *,
+    configured_cwd: str,
+    terminal_backend: str,
+    messaging_cwd: str | None,
+    docker_mount_cwd_to_workspace: bool,
+    home_fallback: str,
+) -> str | None:
+    """Return the ``TERMINAL_CWD`` value to set, or ``None`` to leave it unset.
+
+    Cases:
+      - **local** + placeholder → ``MESSAGING_CWD`` or ``home_fallback``
+      - **docker** + placeholder + mount on + host ``MESSAGING_CWD`` → host path
+        (for ``terminal_tool`` ``/workspace`` mapping)
+      - **docker** + placeholder + mount off → ``None`` (sandbox default)
+      - other non-local backends + placeholder → ``None``
+    """
+    if configured_cwd and configured_cwd not in CWD_PLACEHOLDERS:
+        return configured_cwd
+
+    backend = (terminal_backend or "local").strip().lower()
+    if backend == "local":
+        messaging = (messaging_cwd or "").strip()
+        return messaging or home_fallback
+
+    if backend == "docker" and docker_mount_cwd_to_workspace:
+        messaging = (messaging_cwd or "").strip()
+        if messaging and messaging not in CWD_PLACEHOLDERS:
+            return messaging
+
+    return None