Warn about duplicate language names and extensions

github-linguist · May 22, 2011 · a583a60 · a583a60
1 parent 51e974d
commit a583a60
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/lib/linguist/language.rb b/lib/linguist/language.rb
@@ -11,6 +11,10 @@ class Language
     def self.create(attributes = {})
       language = new(attributes)
 
+      if @name_index.key?(language.name.downcase)
+        warn "Duplicate language name: #{language.name}"
+      end
+
       @name_index[language.name.downcase] = language
 
       if attributes[:default_lexer] || language.default_lexer?
@@ -20,6 +24,10 @@ def self.create(attributes = {})
       @lexer_index[language.lexer_name.downcase] ||= language
 
       language.extensions.each do |extension|
+        if @extension_index.key?(extension)
+          warn "Duplicate extension: #{extension}"
+        end
+
         @extension_index[extension] = language
         @extension_index[extension.sub(/^./, '')] = language
       end