fix: preserve webui launcher environment

(cherry picked from commit 2297ab4db854b52b20cdd34731cd82e8cc5bdb72)

bootstrap.py

@@ -28,8 +28,8 @@ def _load_repo_dotenv() -> None:
     ``python3 bootstrap.py`` directly behaves identically to ``./start.sh``.
     Variables are set unconditionally (matching shell source semantics), so a
     value in .env overrides one already present in the shell environment.
-    To keep a CLI-supplied value, unset it from .env or launch via start.sh
-    and override there.
+    ``ctl.sh`` sets HERMES_WEBUI_PRESERVE_ENV=1 when it has already resolved
+    launcher-specific values such as HERMES_HOME or HERMES_WEBUI_STATE_DIR.
 
     Only loads the webui repo .env — not ~/.hermes/.env, which the server
     loads independently at startup for provider credentials.
@@ -41,6 +41,12 @@ def _load_repo_dotenv() -> None:
     if not env_path.exists():
         return
     try:
+        preserve_existing = os.getenv("HERMES_WEBUI_PRESERVE_ENV", "").strip().lower() in {
+            "1",
+            "true",
+            "yes",
+            "on",
+        }
         for raw_line in env_path.read_text(encoding="utf-8").splitlines():
             line = raw_line.strip()
             if not line or line.startswith("#") or "=" not in line:
@@ -52,6 +58,8 @@ def _load_repo_dotenv() -> None:
                 k = k[7:].strip()
             v = v.strip().strip('"').strip("'")
             if k:
+                if preserve_existing and k in os.environ:
+                    continue
                 os.environ[k] = v
     except Exception as exc:
         import sys as _sys

ctl.sh

@@ -219,7 +219,9 @@ start_cmd() {
   : >> "${LOG_FILE}"
   (
     cd "${REPO_ROOT}"
-    exec "${python_exe}" "${REPO_ROOT}/bootstrap.py" --no-browser --foreground --host "${CTL_HOST}" "${CTL_PORT}" ${CTL_BOOTSTRAP_ARGS[@]+"${CTL_BOOTSTRAP_ARGS[@]}"}
+    trap '' HUP
+    export HERMES_WEBUI_PRESERVE_ENV=1
+    exec nohup "${python_exe}" "${REPO_ROOT}/bootstrap.py" --no-browser --foreground --host "${CTL_HOST}" "${CTL_PORT}" ${CTL_BOOTSTRAP_ARGS[@]+"${CTL_BOOTSTRAP_ARGS[@]}"}
   ) >> "${LOG_FILE}" 2>&1 &
   pid=$!
 

tests/test_bootstrap_dotenv.py

@@ -112,6 +112,18 @@ class TestLoadRepoDotenv:
         self._run(tmp_path, "HERMES_WEBUI_HOST=0.0.0.0\n")
         assert os.environ.get("HERMES_WEBUI_HOST") == "0.0.0.0"
 
+    def test_preserve_existing_env_keeps_ctl_overrides(self, tmp_path):
+        """ctl.sh can ask bootstrap.py to keep wrapper-provided env values."""
+        os.environ["HERMES_WEBUI_PRESERVE_ENV"] = "1"
+        os.environ["HERMES_HOME"] = "/runtime/hermesOne"
+        os.environ["HERMES_WEBUI_PASSWORD"] = ""
+        self._run(
+            tmp_path,
+            "HERMES_HOME=/repo/default\nHERMES_WEBUI_PASSWORD=repo-password\n",
+        )
+        assert os.environ.get("HERMES_HOME") == "/runtime/hermesOne"
+        assert os.environ.get("HERMES_WEBUI_PASSWORD") == ""
+
     def test_does_not_set_empty_values(self, tmp_path):
         """A key whose value is empty after stripping is not set to a non-empty string."""
         os.environ.pop("HERMES_EMPTY_KEY", None)

tests/test_ctl_script.py

@@ -138,6 +138,13 @@ def test_start_writes_pid_under_hermes_home_runs_foreground_no_browser_and_logs(
         assert not pid_file.exists()
 
 
+def test_start_uses_nohup_so_daemon_survives_launcher_exit():
+    ctl_text = CTL.read_text(encoding="utf-8")
+
+    assert "trap '' HUP" in ctl_text
+    assert 'exec nohup "${python_exe}"' in ctl_text
+
+
 def test_start_loads_dotenv_but_inline_overrides_win(tmp_path):
     repo_root = tmp_path / "repo"
     repo_root.mkdir()