Extract filename strategy

lib/linguist/strategy/filename.rb

@@ -0,0 +1,20 @@
+module Linguist
+  module Strategy
+    class Filename
+      def call(blob)
+        name = blob.name.to_s
+
+        # A bit of an elegant hack. If the file is executable but extensionless,
+        # append a "magic" extension so it can be classified with other
+        # languages that have shebang scripts.
+        extension = FileBlob.new(name).extension
+        if extension.empty? && blob.mode && (blob.mode.to_i(8) & 05) == 05
+          name += ".script!"
+        end
+
+        # First try to find languages that match based on filename.
+        possible_languages = Language.find_by_filename(name)
+      end
+    end
+  end
+end