Brakeman#rescan returns true if file change mattered

lib/brakeman.rb

@@ -255,10 +255,14 @@ module Brakeman
   def self.rescan tracker, files
     scanner = Scanner.new tracker.options, tracker.processor
 
+    changed = false
+
     files.each do |path|
-      scanner.rescan_file File.expand_path(path)
+      if scanner.rescan_file File.expand_path(path)
+        changed = true
+      end
     end
 
-    tracker
+    changed
   end
 end

lib/brakeman/scanner.rb

@@ -387,10 +387,12 @@ class Brakeman::Scanner
     when :gemfile
       process_gems
     else
-      raise "Cannot scan file: #{path}"
+      return false #Nothing to do, file hopefully does not need to be rescanned
     end
 
     index_call_sites
+
+    true
   end
 
   def rescan_controller path