Heuristic rules to distinguish .sc files between SuperCollider and Scala

lib/linguist/heuristics.rb

@@ -25,6 +25,9 @@ module Linguist
         if languages.all? { |l| ["Common Lisp", "OpenCL"].include?(l) }
           result = disambiguate_cl(data, languages)
         end
+        if languages.all? { |l| ["Scala", "SuperCollider"].include?(l) }
+          result = disambiguate_sc(data, languages)
+        end
         return result
       end
     end
@@ -88,6 +91,17 @@ module Linguist
       matches
     end
 
+    def self.disambiguate_sc(data, languages)
+      matches = []
+      if (/\^(this|super)\./.match(data) or /^\s*(\+|\*)\s*\w+\s*{/.match(data) or /^\s*~\w+\s*=\./.match(data))
+        matches << Language["SuperCollider"]
+      end
+      if (/^\s*import (scala|java)\./.match(data) or /^\s*val\s+\w+\s*=/.match(data) or /^\s*class\b/.match(data))
+        matches << Language["Scala"]
+      end
+      matches
+    end
+
     def self.active?
       !!ACTIVE
     end

test/test_heuristics.rb

@@ -98,4 +98,16 @@ class TestHeuristcs < Test::Unit::TestCase
       end
     end
   end
+
+  def test_sc_supercollider_by_heuristics
+    languages = ["Scala", "SuperCollider"]
+    results = Heuristics.disambiguate_sc(fixture("SuperCollider/WarpPreset.sc"), languages)
+    assert_equal Language["SuperCollider"], results.first
+  end
+
+  def test_sc_scala_by_heuristics
+    languages = ["Scala", "SuperCollider"]
+    results = Heuristics.disambiguate_sc(fixture("Scala/node11.sc"), languages)
+    assert_equal Language["Scala"], results.first
+  end
 end