util.rb in kontena-cli-0.15.1

- old
+ new

@@ -1,8 +1,7 @@
 module Kontena
   module Util
-    
     def self.included(base)
         base.extend(ClassMethods)
     end
 
     # @param [String] cmd
@@ -14,15 +13,28 @@
           return exe if File.executable?(exe) && !File.directory?(exe)
         }
       end
       return nil
     end
+
+    # Compatibility between ruby_dig and Ruby 2.3. Ruby_dig returns
+    # nil when trying to dig into a string, Ruby 2.3 dig raises
+    # TypeError.
+    #
+    # @param [Hash] source_hash
+    # @param [*keys] list_of_keys
+    def safe_dig(hash, *keys)
+      hash.dig(*keys)
+    rescue TypeError
+      nil
+    end
+
     module_function(:which)
 
     module ClassMethods
       def experimental?
         ENV.has_key?('KONTENA_EXPERIMENTAL')
-      end   
+      end
     end
-    
+
   end
 end