fix(supervise): apply egress approvals

bot_bottle/backend/docker/egress_apply.py

@@ -1,17 +1,20 @@
-"""Host-side helper for egress sidecar inspection (issue #198).
+"""Host-side helper for egress sidecar inspection and live updates.
 
-`_merge_single_route`, `add_route`, and `apply_routes_change` were
-removed when the egress-block MCP tool was dropped. The remaining
-helpers support runtime inspection and validation of the routes file
-without modifying it at runtime.
+The approve path uses this module to validate a proposed routes file,
+write it to the bottle's live egress state dir, and signal the sidecar
+bundle so the mitmproxy addon reloads it.
 """
 
 from __future__ import annotations
 
+import os
 import subprocess
+from pathlib import Path
 
+from ...bottle_state import egress_state_dir, read_metadata
 from ...egress import EGRESS_ROUTES_IN_CONTAINER
 from ...egress_addon_core import load_routes
+from ...log import warn
 from .sidecar_bundle import sidecar_bundle_container_name
 
 
@@ -29,10 +32,22 @@ def fetch_current_routes(slug: str) -> str:
         raise EgressApplyError(
             f"could not read routes.yaml from {container}: "
             f"{(r.stderr or '').strip() or 'container not running?'}"
-        )
+    )
     return r.stdout
 
 
+def apply_routes_change(slug: str, content: str) -> tuple[str, str]:
+    """Persist `content` to the live routes file and reload egress."""
+    validate_routes_content(content)
+    routes_path = _routes_path(slug)
+    routes_path.parent.mkdir(parents=True, exist_ok=True)
+    before = routes_path.read_text(encoding="utf-8") if routes_path.exists() else ""
+    routes_path.write_text(content, encoding="utf-8")
+    routes_path.chmod(0o600)
+    _signal_bundle_reload(slug)
+    return before, content
+
+
 def validate_routes_content(content: str) -> None:
     try:
         load_routes(content)
@@ -42,8 +57,57 @@ def validate_routes_content(content: str) -> None:
         ) from e
 
 
+def _routes_path(slug: str) -> Path:
+    return egress_state_dir(slug) / "egress_routes.yaml"
+
+
+def _signal_bundle_reload(slug: str) -> None:
+    container = sidecar_bundle_container_name(slug)
+    backend = ""
+    metadata = read_metadata(slug)
+    if metadata is not None:
+        backend = metadata.backend
+
+    candidates: list[list[str]]
+    if backend == "macos-container":
+        candidates = [["container", "kill", "--signal", "HUP", container]]
+    elif backend:
+        candidates = [["docker", "kill", "--signal", "HUP", container]]
+    else:
+        candidates = [
+            ["docker", "kill", "--signal", "HUP", container],
+            ["container", "kill", "--signal", "HUP", container],
+        ]
+
+    last_error = ""
+    for argv in candidates:
+        try:
+            result = subprocess.run(
+                argv,
+                capture_output=True,
+                text=True,
+                check=False,
+                env=os.environ,
+            )
+        except FileNotFoundError as e:
+            last_error = str(e)
+            continue
+        if result.returncode == 0:
+            return
+        last_error = (result.stderr or "").strip() or (result.stdout or "").strip()
+    warn(
+        f"egress: routes updated on disk for {slug}, but bundle reload failed: "
+        f"{last_error or 'no reload command succeeded'}"
+    )
+    raise EgressApplyError(
+        f"could not reload egress bundle {container}: "
+        f"{last_error or 'no reload command succeeded'}"
+    )
+
+
 __all__ = [
     "EgressApplyError",
+    "apply_routes_change",
     "fetch_current_routes",
     "validate_routes_content",
 ]

bot_bottle/backend/macos_container/launch.py

@@ -12,7 +12,6 @@ from __future__ import annotations
 
 import dataclasses
 import os
-import shutil
 import subprocess
 from contextlib import ExitStack, contextmanager
 from pathlib import Path
@@ -364,8 +363,8 @@ def _sidecar_mounts(
     ))
     if ep.routes:
         mounts.append((
-            str(_stage_routes_dir(plan)),
-            str(Path(EGRESS_ROUTES_IN_CONTAINER).parent),
+            str(ep.routes_path),
+            EGRESS_ROUTES_IN_CONTAINER,
             True,
         ))
 
@@ -375,17 +374,6 @@ def _sidecar_mounts(
 
     return tuple(mounts)
 
-
-def _stage_routes_dir(plan: MacosContainerBottlePlan) -> Path:
-    routes_dir = plan.stage_dir / "macos-container-egress"
-    routes_dir.mkdir(parents=True, exist_ok=True)
-    shutil.copyfile(
-        plan.egress_plan.routes_path,
-        routes_dir / Path(EGRESS_ROUTES_IN_CONTAINER).name,
-    )
-    return routes_dir
-
-
 def _mount_spec(host_path: str, container_path: str, read_only: bool) -> str:
     spec = f"type=bind,source={host_path},target={container_path}"
     if read_only:

bot_bottle/cli/supervise.py

@@ -26,6 +26,10 @@ from .. import supervise as _supervise
 #     CapabilityApplyError,
 #     apply_capability_change,
 # )
+from ..backend.docker.egress_apply import (
+    EgressApplyError,
+    apply_routes_change,
+)
 from ..log import Die, error, info
 
 
@@ -66,7 +70,7 @@ class QueuedProposal:
 # Errors any remediation engine may raise. Caught by the TUI key
 # handlers and surfaced in the status line so a failed apply keeps
 # the proposal pending rather than crashing curses.
-ApplyError = (CapabilityApplyError,)
+ApplyError = (CapabilityApplyError, EgressApplyError)
 
 
 def discover_pending() -> list[QueuedProposal]:
@@ -134,6 +138,7 @@ def approve(
 ) -> None:
     """Apply the proposal, write the waiting response, and audit it."""
     status = STATUS_MODIFIED if final_file is not None else STATUS_APPROVED
+    file_to_apply = final_file if final_file is not None else qp.proposal.proposed_file
 
     diff_before, diff_after = "", ""
     # if qp.proposal.tool == TOOL_CAPABILITY_BLOCK:
@@ -147,6 +152,11 @@ def approve(
     #     diff_before, diff_after = apply_capability_change(
     #         qp.proposal.bottle_slug, file_to_apply,
     #     )
+    if qp.proposal.tool in (TOOL_ALLOW, TOOL_EGRESS_BLOCK):
+        diff_before, diff_after = apply_routes_change(
+            qp.proposal.bottle_slug,
+            file_to_apply,
+        )
 
     response = Response(
         proposal_id=qp.proposal.id,

tests/unit/test_egress_apply.py

@@ -2,10 +2,16 @@
 add_route removed; docker exec / cp / kill paths are covered by the
 integration test)."""
 
+import tempfile
 import unittest
+from pathlib import Path
+from types import SimpleNamespace
+from unittest.mock import patch
 
+from bot_bottle import supervise
 from bot_bottle.backend.docker.egress_apply import (
     EgressApplyError,
+    apply_routes_change,
     validate_routes_content,
 )
 
@@ -52,5 +58,45 @@ class TestValidateRoutesContent(unittest.TestCase):
             )
 
 
+class TestApplyRoutesChange(unittest.TestCase):
+    def setUp(self):
+        self._tmp = tempfile.TemporaryDirectory(prefix="egress-apply-test.")
+        original = supervise.bot_bottle_root
+
+        def fake_root() -> Path:
+            return Path(self._tmp.name) / ".bot-bottle"
+
+        supervise.bot_bottle_root = fake_root  # type: ignore[assignment]
+        self.addCleanup(lambda: setattr(supervise, "bot_bottle_root", original))
+        self.addCleanup(self._tmp.cleanup)
+
+    def test_writes_live_routes_and_signals_reload(self):
+        calls: list[list[str]] = []
+
+        def fake_run(argv, **kwargs):
+            calls.append(list(argv))
+            return SimpleNamespace(returncode=0, stdout="", stderr="")
+
+        with patch(
+            "bot_bottle.backend.docker.egress_apply.subprocess.run",
+            side_effect=fake_run,
+        ):
+            before, after = apply_routes_change(
+                "dev",
+                "routes:\n  - host: google.com\n",
+            )
+
+        self.assertEqual("", before)
+        self.assertEqual("routes:\n  - host: google.com\n", after)
+        self.assertEqual(
+            "routes:\n  - host: google.com\n",
+            (Path(self._tmp.name) / ".bot-bottle/state/dev/egress/egress_routes.yaml").read_text(encoding="utf-8"),
+        )
+        self.assertEqual(
+            ["docker", "kill", "--signal", "HUP", "bot-bottle-sidecars-dev"],
+            calls[0],
+        )
+
+
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_macos_container_launch.py

@@ -125,15 +125,10 @@ class TestMacosContainerLaunchArgv(unittest.TestCase):
             f"type=bind,source={self.stage_dir / 'egress-ca'},target=/home/mitmproxy/.mitmproxy",
             argv,
         )
-        routes_dir = self.stage_dir / "macos-container-egress"
         self.assertIn(
-            f"type=bind,source={routes_dir},target=/etc/egress,readonly",
+            f"type=bind,source={self.stage_dir / 'source-routes.yaml'},target=/etc/egress/routes.yaml,readonly",
             argv,
         )
-        self.assertEqual(
-            "routes: []\n",
-            (routes_dir / "routes.yaml").read_text(encoding="utf-8"),
-        )
         self.assertIn(
             "type=bind,source=/state/supervise/queue,target=/run/supervise/queue",
             argv,

tests/unit/test_supervise_cli.py

@@ -9,6 +9,7 @@ import tempfile
 import unittest
 from datetime import datetime, timezone
 from pathlib import Path
+from unittest.mock import patch
 
 from bot_bottle import supervise
 from bot_bottle.cli import supervise as supervise_cli
@@ -155,7 +156,15 @@ class TestApproveReject(_FakeHomeMixin, unittest.TestCase):
 
     def test_approve_egress_block_writes_audit_log(self):
         qp = self._enqueue(tool=supervise.TOOL_EGRESS_BLOCK)
-        supervise_cli.approve(qp)
+        with patch(
+            "bot_bottle.cli.supervise.apply_routes_change",
+            return_value=("routes: []\n", "routes:\n  - host: example.com\n"),
+        ) as apply_routes_change:
+            supervise_cli.approve(qp)
+        apply_routes_change.assert_called_once_with(
+            "dev",
+            "routes:\n  - host: example.com\n",
+        )
         entries = read_audit_entries("egress", "dev")
         self.assertEqual(1, len(entries))
         self.assertEqual(STATUS_APPROVED, entries[0].operator_action)