Also have analysis log to dir

cpp/command/analysis.cpp

@@ -1,6 +1,8 @@
 #include "../core/global.h"
 #include "../core/config_parser.h"
 #include "../core/timer.h"
+#include "../core/datetime.h"
+#include "../core/makedir.h"
 #include "../search/asyncbot.h"
 #include "../program/setup.h"
 #include "../program/playutils.h"
@@ -67,7 +69,16 @@ int MainCmds::analysis(int argc, const char* const* argv) {
   }
 
   Logger logger;
-  logger.addFile(cfg.getString("logFile"));
+  if(cfg.contains("logFile") && cfg.contains("logDir"))
+    throw StringError("Cannot specify both logFile and logDir in config");
+  else if(cfg.contains("logFile"))
+    logger.addFile(cfg.getString("logFile"));
+  else {
+    MakeDir::make(cfg.getString("logDir"));
+    Rand rand;
+    logger.addFile(cfg.getString("logDir") + "/" + DateTime::getCompactDateTimeString() + "-" + Global::uint32ToHexString(rand.nextUInt()) + ".log");
+  }
+
   logger.setLogToStderr(true);
 
   logger.write("Analysis Engine starting...");

cpp/configs/analysis_example.cfg

@@ -6,14 +6,23 @@
 # Logs------------------------------------------------------------------------------------
 
 # Where to output log?
-logFile = gtp.log
+logDir = analysis_logs  # Each run of KataGo will log to a separate file in this dir
+# logFile = analysis.log  # Use this instead of logDir to just specify a single file directly
+
+# Analysis------------------------------------------------------------------------------------
 
 # Controls the number of moves after the first move in a variation.
 # analysisPVLen = 15
 
 # Report winrates for analysis as (BLACK|WHITE|SIDETOMOVE).
 reportAnalysisWinratesAs = BLACK
 
+# Uncomment and and set to a positive value to make KataGo explore the top move(s) less deeply and accurately,
+# but explore and give evaluations to a greater variety of moves, for analysis (does NOT affect play).
+# A value like 0.03 or 0.06 will give various mildly but still noticeably wider searches.
+# An extreme value like 1 will distribute many playouts across every move on the board, even very bad moves.
+# wideRootNoise = 0.0
+
 # Bot behavior---------------------------------------------------------------------------------------
 
 # Handicap -------------