generated.rb in github-linguist-4.8.5

- old
+ new

@@ -57,10 +57,11 @@
       composer_lock? ||
       node_modules? ||
       godeps? ||
       generated_by_zephir? ||
       minified_files? ||
+      has_source_map? ||
       source_map? ||
       compiled_coffeescript? ||
       generated_parser? ||
       generated_net_docfile? ||
       generated_postscript? ||
@@ -100,9 +101,24 @@
       if lines.any?
         (lines.inject(0) { |n, l| n += l.length } / lines.length) > 110
       else
         false
       end
+    end
+
+    # Internal: Does the blob contain a source map reference?
+    #
+    # We assume that if one of the last 2 lines starts with a source map
+    # reference, then the current file was generated from other files.
+    # 
+    # We use the last 2 lines because the last line might be empty.
+    # 
+    # We only handle JavaScript, no CSS support yet.
+    # 
+    # Returns true or false.
+    def has_source_map?
+      return false unless extname.downcase == '.js'
+      lines.last(2).any? { |line| line.start_with?('//# sourceMappingURL') }
     end
 
     # Internal: Is the blob a generated source map?
     #
     # Source Maps usually have .css.map or .js.map extensions. In case they