Adding support to detect the difference between a Grails gsp and a Gosu gsp.

lib/linguist/blob_helper.rb

@@ -432,6 +432,19 @@ module Linguist
         Language['R']
       end
     end
+    
+    
+    # Internal: Guess language of .gsp files.
+    # 
+    # Returns a Language.
+    def guess_gsp_language
+    	    if lines.grep(/<%|<%@|${|<%|<g:|<meta name="layout"|<r:/).any?
+    	Language['Groovy Server Pages']
+      else
+        Language['Gosu']
+      end
+    end
+    
 
     # Internal: Guess language from the first line.
     #

lib/linguist/languages.yml

@@ -379,6 +379,16 @@ Groovy:
   - .gradle
   - .groovy
 
+Groovy Server Pages:
+  group: Groovy
+  lexer: Java Server Page
+  overrides:
+  - .gsp  
+  aliases:
+  - gsp
+  extensions:
+  - .gsp
+
 HTML:
   type: markup
   primary_extension: .html