stockpiles: remove dependency on full protobuf

plugins/stockpiles.cpp

@@ -41,7 +41,6 @@
 
 // protobuf
 #include "proto/stockpiles.pb.h"
-#include <google/protobuf/text_format.h>
 
 //  os
 #include <sys/stat.h>
@@ -476,20 +475,6 @@ public:
         return mBuffer.SerializeToOstream ( &output );
     }
 
-    /**
-     * Serializes the stockpile settings to a string.
-     * @return empty string on error
-     */
-    std::string serialize_to_string()
-    {
-        mBuffer.Clear();
-        write();
-        std::string str;
-        if ( !TextFormat::PrintToString ( mBuffer, &str ) )
-            return std::string();
-        return str;
-    }
-
     /**
      * Read stockpile settings from file
      */
@@ -502,15 +487,6 @@ public:
         return res;
     }
 
-    /**
-     * Read text_format stockpile settings from string
-     */
-    bool unserialize_from_string ( const std::string & data )
-    {
-        mBuffer.Clear();
-        return TextFormat::ParseFromString ( data,  &mBuffer );
-    }
-
 private:
 
     bool mDebug;
@@ -2762,24 +2738,22 @@ static command_result savestock ( color_ostream &out, vector <string> & paramete
             file = o;
         }
     }
+    if ( file.empty() )
+    {
+        out.printerr("You must supply a valid filename.\n");
+        return CR_WRONG_USAGE;
+    }
 
     StockpileSerializer cereal ( sp );
     if ( debug )
         cereal.enable_debug ( out );
-    if ( file.empty() )
+
-    {
-        std::string data = cereal.serialize_to_string();
-        out <<  data <<  endl;
-    }
-    else
-    {
     if ( !is_dfstockfile ( file ) ) file += ".dfstock";
     if ( !cereal.serialize_to_file ( file ) )
     {
         out.printerr ( "serialize failed\n" );
         return CR_FAILURE;
     }
-    }
     return CR_OK;
 }