logreader: avoid repeated prompts in auto_strategy when rlogs are missing (#34890)

* avoid repeated prompts in auto_strategy when rlogs are missing

* shorter

---------

Co-authored-by: Shane Smiskol <shane@smiskol.com>

tools/lib/logreader.py

@@ -119,7 +119,14 @@ def default_valid_file(fn: LogPath) -> bool:
 
 def auto_strategy(rlog_paths: list[LogPath], qlog_paths: list[LogPath], interactive: bool, valid_file: ValidFileCallable) -> list[LogPath]:
   # auto select logs based on availability
-  missing_rlogs = [rlog is None or not valid_file(rlog) for rlog in rlog_paths].count(True)
+  missing_rlogs = sum(rlog is None or not valid_file(rlog) for rlog in rlog_paths)
+  # If all rlogs are missing, check qlogs
+  if missing_rlogs == len(rlog_paths):
+    missing_qlogs = sum(qlog is None or not valid_file(qlog) for qlog in qlog_paths)
+    if missing_qlogs == len(qlog_paths):
+      # Neither rlogs nor qlogs are available, return rlog_paths as-is
+      return rlog_paths
+
   if missing_rlogs != 0:
     if interactive:
       if input(f"{missing_rlogs}/{len(rlog_paths)} rlogs were not found, would you like to fallback to qlogs for those segments? (y/n) ").lower() != "y":