onionperf/onionperf

@@ -261,12 +261,18 @@ files generated by this script will be written""",
         action="store", dest="nickname",
         default=None)
 
-    analyze_parser.add_argument('-d', '--date-filter',
+    date_group = analyze_parser.add_mutually_exclusive_group()
+    date_group.add_argument('-d', '--date-filter',
         help="""a DATE string in the form YYYY-MM-DD, all log messages that did not occur on this date will be filtered out of the analysis""",
         metavar="DATE", type=type_str_date_in,
         action="store", dest="date_filter",
         default=None)
 
+    date_group.add_argument('-x', '--date-prefix',
+        help="""add a date prefix of the form YYYY-MM-DD- to the output file""",
+        action="store_true", dest="date_prefix",
+        default=False)
+
     analyze_parser.add_argument('-s', '--do-simple-parse',
         help="""parse and export only summary statistics rather than full transfer/circuit/stream data""",
         action="store_true", dest="do_simple",
@@ -365,7 +371,13 @@ def analyze(args):
         if args.torctl_logpath is not None:
             analysis.add_torctl_file(args.torctl_logpath)
         analysis.analyze(args.do_simple, date_filter=args.date_filter)
-        analysis.save(output_prefix=args.prefix)
+
+        filename = None
+        if args.date_prefix:
+            n = datetime.datetime.utcnow()
+            filename = "{}-onionperf.analysis.json.xz".format(n.strftime("%Y-%m-%d"))
+
+        analysis.save(filename=filename, output_prefix=args.prefix)
 
     elif args.tgen_logpath is not None and os.path.isdir(args.tgen_logpath) and args.torctl_logpath is not None and os.path.isdir(args.torctl_logpath):
         from onionperf import reprocessing