#1638 New heuristics to distinguish between AsciiDoc, AGS Script, and Public Key.

lib/linguist/heuristics.rb

@@ -150,8 +150,14 @@ module Linguist
       end
     end
 
-    disambiguate "AsciiDoc", "AGS Script" do |data|
-      Language["AsciiDoc"] if /^=+(\s|\n)/.match(data)
+    disambiguate "AsciiDoc", "AGS Script", "Public Key" do |data|
+      if /^=+(\s|\n)/.match(data)
+        Language["AsciiDoc"]
+      elsif /^((\/\/)|((import|export)\s+)?(function|int|float|char)\s+((room|repeatedly|on|game)_)?([A-Za-z]+[A-Za-z_0-9]+))\s*[;\(]?/.match(data)
+        Language["AGS Script"]
+      else /^-----BEGIN/.match(data)
+        Language["Public Key"]
+      end
     end
 
     disambiguate "FORTRAN", "Forth" do |data|

test/test_heuristics.rb

@@ -68,11 +68,12 @@ class TestHeuristcs < Minitest::Test
     })
   end
 
-  # Candidate languages = ["AGS Script", "AsciiDoc"]
-  def test_asc_asciidoc_by_heuristics
+  # Candidate languages = ["AGS Script", "AsciiDoc", "Public Key"]
+  def test_asc_by_heuristics
     assert_heuristics({
       "AsciiDoc" => "AsciiDoc/list.asc",
-      "AGS Script" => nil
+      "AGS Script" => "AGS Script/GlobalScript.asc",
+      "Public Key" => "Public Key/sunCert.asc"
     })
   end