lib/notifiers/growl.rb in notifiers-1.1.0 vs lib/notifiers/growl.rb in notifiers-1.2.0

@@ -1,54 +1,55 @@
 class Growl
-  COMMAND = "growlnotify"
+  COMMAND       = 'growlnotify'
+  ERROR_MESSAGE = "The Growl is not installed. You can find more details here:
+http://growl.info/downloads"
 
   def image(icon)
     @image = icon
     self
   end
-  
+
   def title(text)
     @title = text
     self
   end
 
   def message(text)
     @message = text
     self
   end
-  
+
   def priority(number)
     @priority = number
     self
   end
-  
+
   def host(hostname)
     @host = hostname
     self
   end
-  
+
   def password(secret)
     @password = secret
     self
   end
-  
+
   def auth(authentication)
     @auth = authentication
     self
   end
-  
+
   def to_s
     command = COMMAND.clone
     command << " --title '#{@title}'" if @title
     command << " --message '#{@message}'"
     [:image, :priority, :host, :password, :auth].each do |option|
       variable = instance_variable_get("@#{option}")
       command << " --#{option} #{variable}" if variable
     end
     command
   end
-  
+
   def notify!
-    system(to_s)
+    puts ERROR_MESSAGE unless system(to_s)
   end
-
 end
\ No newline at end of file