metrixpp/ext/std/code/magic.py

#
#    Metrix++, Copyright 2009-2019, Metrix++ Project
#    Link: https://github.com/metrixplusplus/metrixplusplus
#    
#    This file is a part of Metrix++ Tool.
#    

import mpp.api
import re

class Plugin(mpp.api.Plugin,
             mpp.api.IConfigurable,
             mpp.api.Child,
             mpp.api.MetricPluginMixin):
    
    def declare_configuration(self, parser):
        parser.add_option("--std.code.magic.numbers", "--scmn",
            action="store_true", default=False,
            help="Enables collection of magic numbers metric [default: %default]")
        parser.add_option("--std.code.magic.numbers.simplier", "--scmns",
            action="store_true", default=False,
            help="Is set, 0, -1 and 1 numbers are not counted "
            "in 'std.code.magic.numbers' metric [default: %default]")
    
    def configure(self, options):
        self.is_active_numbers = options.__dict__['std.code.magic.numbers']
        self.is_active_numbers_simplier = options.__dict__['std.code.magic.numbers.simplier']
    
    def initialize(self):
        pattern_to_search_java = re.compile(
            r'''((const(\s+[_$a-zA-Z][_$a-zA-Z0-9]*)+\s*[=]\s*)[-+]?[0-9]+\b)|(\b[0-9]+\b)''')
        pattern_to_search_cpp_cs = re.compile(
            r'''((const(\s+[_a-zA-Z][_a-zA-Z0-9]*)+\s*[=]\s*)[-+]?[0-9]+\b)|(\b[0-9]+\b)''')
        self.declare_metric(self.is_active_numbers,
                            self.Field('numbers', int,
                                non_zero=True),
                            {
                             'std.code.java': (pattern_to_search_java, self.NumbersCounter),
                             'std.code.cpp': (pattern_to_search_cpp_cs, self.NumbersCounter),
                             'std.code.cs': (pattern_to_search_cpp_cs, self.NumbersCounter),
                            },
                            marker_type_mask=mpp.api.Marker.T.CODE,
                            region_type_mask=mpp.api.Region.T.ANY)
        
        super(Plugin, self).initialize(fields=self.get_fields(),
            properties=[self.Property('number.simplier', self.is_active_numbers_simplier)])
        
        if self.is_active() == True:
            self.subscribe_by_parents_interface(mpp.api.ICode)

    class NumbersCounter(mpp.api.MetricPluginMixin.IterIncrementCounter):
        def increment(self, match):
            if (match.group(0).startswith('const') or
                (self.plugin.is_active_numbers_simplier == True and
                 match.group(0) in ['0', '1', '-1', '+1'])):
                return 0
            return 1