working in production - not entirely validated. parallel mode working.

LVX6048/bin/lvx-resolve-links

@@ -63,19 +63,35 @@ def _relink(link: str, target: str) -> None:
 
 
 async def main() -> int:
-    candidates = sorted(glob.glob("/dev/hidraw*"))
-    if not candidates:
-        print("no /dev/hidraw* devices present", file=sys.stderr)
-        return 1
-
+    # Hot-plug case: udev fires this script as soon as one hidraw appears, but
+    # a sibling inverter coming up at nearly the same moment may still be
+    # enumerating. Retry-probe up to ~10 s waiting for all expected serials,
+    # so a transient single-device sighting doesn't leave one symlink missing.
+    expected = set(LINK_FOR_SERIAL.keys())
+    deadline = asyncio.get_event_loop().time() + 10.0
     sn_to_path: dict[str, str] = {}
-    for p in candidates:
-        sn = await probe_serial(p)
-        if sn:
-            print(f"{p}: serial {sn}")
-            sn_to_path[sn] = p
-        else:
-            print(f"{p}: no PI18 response (probably not an LVX6048)")
+    seen_paths: set[str] = set()
+    while True:
+        candidates = sorted(glob.glob("/dev/hidraw*"))
+        for p in candidates:
+            if p in seen_paths:
+                continue
+            seen_paths.add(p)
+            sn = await probe_serial(p)
+            if sn:
+                print(f"{p}: serial {sn}")
+                sn_to_path[sn] = p
+            else:
+                print(f"{p}: no PI18 response (probably not an LVX6048)")
+        if expected.issubset(sn_to_path):
+            break
+        if asyncio.get_event_loop().time() >= deadline:
+            break
+        await asyncio.sleep(0.5)
+
+    if not sn_to_path:
+        print("no LVX6048 devices found on /dev/hidraw*", file=sys.stderr)
+        return 1
 
     missing = []
     for sn, link in LINK_FOR_SERIAL.items():