fix(update): add heartbeat during dependency install

hermes_cli/main.py

@@ -230,6 +230,7 @@ except Exception:
     pass  # best-effort — don't crash if config isn't available yet
 
 import logging
+import threading
 import time as _time
 from datetime import datetime
 
@@ -6445,6 +6446,45 @@ def _load_installable_optional_extras() -> list[str]:
     return referenced
 
 
+def _run_install_with_heartbeat(
+    cmd: list[str],
+    *,
+    env: dict[str, str] | None = None,
+    heartbeat_interval_seconds: int = 30,
+) -> None:
+    """Run dependency install command with periodic heartbeat output.
+
+    Some resolvers/build backends (especially when compiling Rust/C extensions)
+    can stay quiet for minutes. Emit a simple elapsed-time heartbeat so users
+    know ``hermes update`` is still progressing even if pip/uv itself is silent.
+    """
+    done = threading.Event()
+    start = _time.time()
+
+    def _heartbeat() -> None:
+        # Wait first, then print, so short installs don't emit noise.
+        while not done.wait(heartbeat_interval_seconds):
+            elapsed = int(_time.time() - start)
+            print(
+                f"  … still installing dependencies ({elapsed}s elapsed)"
+                " — compiling Rust/C extensions can take several minutes",
+                flush=True,
+            )
+
+    t = threading.Thread(target=_heartbeat, daemon=True)
+    t.start()
+    try:
+        subprocess.run(
+            cmd,
+            cwd=PROJECT_ROOT,
+            check=True,
+            env=env,
+        )
+    finally:
+        done.set()
+        t.join(timeout=0.2)
+
+
 def _install_python_dependencies_with_optional_fallback(
     install_cmd_prefix: list[str],
     *,
@@ -6461,12 +6501,13 @@ def _install_python_dependencies_with_optional_fallback(
     Collecting/Building/Installing step), so keeping it visible costs
     nothing on fast hardware and prevents the "hermes update hangs" reports
     on slow hardware.
+
+    We also add periodic heartbeat lines in case the resolver/build backend is
+    itself silent for long stretches.
     """
     try:
-        subprocess.run(
+        _run_install_with_heartbeat(
             install_cmd_prefix + ["install", "-e", ".[all]"],
-            cwd=PROJECT_ROOT,
-            check=True,
             env=env,
         )
         return
@@ -6475,10 +6516,8 @@ def _install_python_dependencies_with_optional_fallback(
             "  ⚠ Optional extras failed, reinstalling base dependencies and retrying extras individually..."
         )
 
-    subprocess.run(
+    _run_install_with_heartbeat(
         install_cmd_prefix + ["install", "-e", "."],
-        cwd=PROJECT_ROOT,
-        check=True,
         env=env,
     )
 
@@ -6486,10 +6525,8 @@ def _install_python_dependencies_with_optional_fallback(
     installed_extras: list[str] = []
     for extra in _load_installable_optional_extras():
         try:
-            subprocess.run(
+            _run_install_with_heartbeat(
                 install_cmd_prefix + ["install", "-e", f".[{extra}]"],
-                cwd=PROJECT_ROOT,
-                check=True,
                 env=env,
             )
             installed_extras.append(extra)

tests/hermes_cli/test_update_autostash.py

@@ -323,15 +323,15 @@ def test_cmd_update_retries_optional_extras_individually_when_all_fails(monkeypa
             return SimpleNamespace(stdout="main\n", stderr="", returncode=0)
         if cmd == ["git", "rev-list", "HEAD..origin/main", "--count"]:
             return SimpleNamespace(stdout="1\n", stderr="", returncode=0)
-        if cmd == ["git", "pull", "origin", "main"]:
+        if cmd == ["git", "pull", "--ff-only", "origin", "main"]:
             return SimpleNamespace(stdout="Updating\n", stderr="", returncode=0)
-        if cmd == ["/usr/bin/uv", "pip", "install", "-e", ".[all]", "--quiet"]:
+        if cmd == ["/usr/bin/uv", "pip", "install", "-e", ".[all]"]:
             raise CalledProcessError(returncode=1, cmd=cmd)
-        if cmd == ["/usr/bin/uv", "pip", "install", "-e", ".", "--quiet"]:
+        if cmd == ["/usr/bin/uv", "pip", "install", "-e", "."]:
             return SimpleNamespace(returncode=0)
-        if cmd == ["/usr/bin/uv", "pip", "install", "-e", ".[matrix]", "--quiet"]:
+        if cmd == ["/usr/bin/uv", "pip", "install", "-e", ".[matrix]"]:
             raise CalledProcessError(returncode=1, cmd=cmd)
-        if cmd == ["/usr/bin/uv", "pip", "install", "-e", ".[mcp]", "--quiet"]:
+        if cmd == ["/usr/bin/uv", "pip", "install", "-e", ".[mcp]"]:
             return SimpleNamespace(returncode=0)
         # Catch-all must include stdout/stderr so consumers that parse
         # output (e.g. the dashboard-restart `ps -A` scan added in the
@@ -344,10 +344,10 @@ def test_cmd_update_retries_optional_extras_individually_when_all_fails(monkeypa
 
     install_cmds = [c for c in recorded if "pip" in c and "install" in c]
     assert install_cmds == [
-        ["/usr/bin/uv", "pip", "install", "-e", ".[all]", "--quiet"],
-        ["/usr/bin/uv", "pip", "install", "-e", ".", "--quiet"],
-        ["/usr/bin/uv", "pip", "install", "-e", ".[matrix]", "--quiet"],
-        ["/usr/bin/uv", "pip", "install", "-e", ".[mcp]", "--quiet"],
+        ["/usr/bin/uv", "pip", "install", "-e", ".[all]"],
+        ["/usr/bin/uv", "pip", "install", "-e", "."],
+        ["/usr/bin/uv", "pip", "install", "-e", ".[matrix]"],
+        ["/usr/bin/uv", "pip", "install", "-e", ".[mcp]"],
     ]
 
     out = capsys.readouterr().out
@@ -371,7 +371,7 @@ def test_cmd_update_succeeds_with_extras(monkeypatch, tmp_path):
             return SimpleNamespace(stdout="main\n", stderr="", returncode=0)
         if cmd == ["git", "rev-list", "HEAD..origin/main", "--count"]:
             return SimpleNamespace(stdout="1\n", stderr="", returncode=0)
-        if cmd == ["git", "pull", "origin", "main"]:
+        if cmd == ["git", "pull", "--ff-only", "origin", "main"]:
             return SimpleNamespace(stdout="Updating\n", stderr="", returncode=0)
         return SimpleNamespace(returncode=0, stdout="", stderr="")
 
@@ -384,6 +384,24 @@ def test_cmd_update_succeeds_with_extras(monkeypatch, tmp_path):
     assert ".[all]" in install_cmds[0]
 
 
+def test_install_heartbeat_prints_when_dependency_install_is_silent(monkeypatch, capsys):
+    """Long quiet installs should emit periodic heartbeat lines."""
+
+    def fake_run(cmd, **kwargs):
+        hermes_main._time.sleep(1.2)
+        return SimpleNamespace(returncode=0)
+
+    monkeypatch.setattr(hermes_main.subprocess, "run", fake_run)
+
+    hermes_main._run_install_with_heartbeat(
+        ["uv", "pip", "install", "-e", "."],
+        heartbeat_interval_seconds=1,
+    )
+
+    out = capsys.readouterr().out
+    assert "still installing dependencies" in out
+
+
 # ---------------------------------------------------------------------------
 # ff-only fallback to reset --hard on diverged history
 # ---------------------------------------------------------------------------