Class: Licensee::Matchers::Dice

Inherits:
Matcher
  • Object
show all
Defined in:
lib/licensee/matchers/dice.rb

Constant Summary

Constants inherited from Matcher

Matcher::HASH_METHODS

Instance Attribute Summary

Attributes inherited from Matcher

#file

Instance Method Summary collapse

Methods inherited from Matcher

#initialize, #name

Methods included from HashHelper

#to_h

Constructor Details

This class inherits a constructor from Licensee::Matchers::Matcher

Instance Method Details

#confidence ⇒ Object

Confidence that the matched license is a match



53
54
55
 
# File 'lib/licensee/matchers/dice.rb', line 53

def confidence
  @confidence ||= match ? match.similarity(file) : 0
end

#match ⇒ Object

Return the first potential license that is more similar than the confidence threshold



8
9
10
11
12
13
14
 
# File 'lib/licensee/matchers/dice.rb', line 8

def match
  @match ||= if matches.empty?
               nil
             else
               matches.first[0]
             end
end

#matches ⇒ Object 



46
47
48
49
50
 
# File 'lib/licensee/matchers/dice.rb', line 46

def matches
  @matches ||= matches_by_similarity.select do |_, similarity|
    similarity >= minimum_confidence
  end
end

#matches_by_similarity ⇒ Object Also known as: licenses_by_similarity 



36
37
38
39
40
41
42
43
 
# File 'lib/licensee/matchers/dice.rb', line 36

def matches_by_similarity
  @matches_by_similarity ||= begin
    matches = potential_matches.map do |potential_match|
      [potential_match, potential_match.similarity(file)]
    end
    matches.sort_by { |_, similarity| similarity }.reverse
  end
end

#potential_matches ⇒ Object Also known as: potential_licenses

Licenses that may be a match for this file. To avoid false positives:

  1. Creative commons licenses cannot be matched against license files that begin with the title of a non-open source CC license variant

  2. The percentage change in file length may not exceed the inverse of the confidence threshold



23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/licensee/matchers/dice.rb', line 23

def potential_matches
  @potential_matches ||= begin
    super.select do |license|
      if license.creative_commons? && file.potential_false_positive?
        false
      else
        license.wordset
      end
    end
  end
end