added nocomments and verbatim passes

compare50/__main__.py

@@ -117,7 +117,7 @@ def __init__(self, option_strings, dest=argparse.SUPPRESS, default=argparse.SUPP
     def __call__(self, parser, namespace, values, option_string=None):
         indentation = " " * 4
         for pass_ in _data.Pass._get_all():
-            print(str(pass_.__name__))
+            print(str(pass_.__name__), f"(default: {'ON' if pass_.default else 'OFF'})")
             for line in textwrap.wrap(pass_.__doc__ or "No description provided", 80 - len(indentation)):
                 print("{}{}".format(indentation, line))
         parser.exit()
@@ -225,7 +225,8 @@ def main():
     parser.add_argument("-p", "--passes",
                         dest="passes",
                         nargs="+",
-                        default=[pass_.__name__ for pass_ in _data.Pass._get_all()],
+                        default=[pass_.__name__ for pass_ in _data.Pass._get_all()
+                                                if pass_.default],
                         help="Specify which passes to use. compare50 ranks only by the first pass, but will render views for every pass.")
     parser.add_argument("-i", "--include",
                         callback=submission_factory.include,

compare50/_data.py

@@ -43,6 +43,9 @@ class Pass(metaclass=_PassRegistry):
     """
     __register = False
 
+    # Whether or not the pass should be enabled by default
+    default = False
+
     @abc.abstractmethod
     def preprocessors(self):
         pass

compare50/passes.py

@@ -8,7 +8,7 @@
 
 class structure(Pass):
     """Compares code structure by removing whitespace and comments; normalizing variable names, string literals, and numeric literals; and then running the winnowing algorithm."""
-
+    default = True
     preprocessors = [preprocessors.strip_whitespace,
                      preprocessors.strip_comments,
                      preprocessors.normalize_identifiers,
@@ -20,16 +20,27 @@ class structure(Pass):
 
 class exact(Pass):
     """Removes all whitespace, then uses the winnowing algorithm to compare submissions."""
+    default = True
     preprocessors = [preprocessors.split_on_whitespace,
                      preprocessors.strip_whitespace]
     comparator = comparators.Winnowing(k=25, t=35)
 
 
 class misspellings(Pass):
     """Compares comments for identically misspelled English words."""
-
+    default = True
     preprocessors = [preprocessors.comments,
                      preprocessors.normalize_case,
                      preprocessors.words]
     comparator = comparators.Misspellings(resource_filename("compare50.comparators",
                                                             "english_dictionary.txt"))
+
+class nocomments(Pass):
+    """Removes comments, but keeps whitespace, then uses the winnowing algorithm to compare submissions"""
+    preprocessors = [preprocessors.strip_comments, preprocessors.split_on_whitespace]
+    comparator = comparators.Winnowing(k=25, t=35)
+
+class verbatim(Pass):
+    """Removes nothing, not even whitespace, then uses the winnowing algorithm to compare submissions"""
+    preprocessors = []
+    comparator = comparators.Winnowing(k=25, t=35)