Core: Add spoiler-only output mode (#4059)

* Core: Add spoiler-only output mode

* spoiler-only exceptions

* Move new errors to mystery_argparse

Generate.py

@@ -54,12 +54,22 @@ def mystery_argparse():
     parser.add_argument("--skip_output", action="store_true",
                         help="Skips generation assertion and output stages and skips multidata and spoiler output. "
                              "Intended for debugging and testing purposes.")
+    parser.add_argument("--spoiler_only", action="store_true",
+                        help="Skips generation assertion and multidata, outputting only a spoiler log. "
+                             "Intended for debugging and testing purposes.")
     args = parser.parse_args()
+
+    if args.skip_output and args.spoiler_only:
+        parser.error("Cannot mix --skip_output and --spoiler_only")
+    elif args.spoiler == 0 and args.spoiler_only:
+        parser.error("Cannot use --spoiler_only when --spoiler=0. Use --skip_output or set --spoiler to a different value")
+
     if not os.path.isabs(args.weights_file_path):
         args.weights_file_path = os.path.join(args.player_files_path, args.weights_file_path)
     if not os.path.isabs(args.meta_file_path):
         args.meta_file_path = os.path.join(args.player_files_path, args.meta_file_path)
     args.plando: PlandoOptions = PlandoOptions.from_option_string(args.plando)
+
     return args
 
 
@@ -108,6 +118,8 @@ def main(args=None) -> Tuple[argparse.Namespace, int]:
             raise Exception("Cannot mix --sameoptions with --meta")
     else:
         meta_weights = None
+
+
     player_id = 1
     player_files = {}
     for file in os.scandir(args.player_files_path):
@@ -164,6 +176,7 @@ def main(args=None) -> Tuple[argparse.Namespace, int]:
     erargs.outputpath = args.outputpath
     erargs.skip_prog_balancing = args.skip_prog_balancing
     erargs.skip_output = args.skip_output
+    erargs.spoiler_only = args.spoiler_only
     erargs.name = {}
     erargs.csv_output = args.csv_output