issue #7109 Doxyapp can't use "[source_file | source_dir]" parameter

- initialization has to be done in an earlier stage (and only once)
- not only the INPUT tag was involved, none of the tags were set.

addon/doxyapp/doxyapp.cpp

@@ -261,6 +261,8 @@ int main(int argc,char **argv)
 
   // setup the non-default configuration options
 
+  Config::postProcess(FALSE);
+  ConfigValues::instance().init();
   // we need a place to put intermediate files
   Config_getString(OUTPUT_DIRECTORY)="/tmp/doxygen"; 
   // disable html output
@@ -283,6 +285,7 @@ int main(int argc,char **argv)
   Config_getBool(SOURCE_BROWSER)=TRUE;
 
   // set the input
+  Config_getList(INPUT).clear();
   Config_getList(INPUT).append(argv[1]);
 
   // check and finialize the configuration

src/configgen.py

@@ -717,6 +717,10 @@ def main():
 		print("")
 		print("void ConfigValues::init()")
 		print("{")
+		print("  static bool first = TRUE;")
+		print("  if (!first) return;")
+		print("  first = FALSE;")
+		print("")
 		for n in elem.childNodes:
 			if n.nodeType == Node.ELEMENT_NODE:
 				if (n.nodeName == "group"):