add library directories to config

Allows to reduce the number of parameters in functions that take
the config anyway.

nominatim/cli.py

@@ -84,6 +84,11 @@ class CommandlineParser:
 
         args.config = Configuration(args.project_dir, args.config_dir,
                                     environ=kwargs.get('environ', os.environ))
+        args.config.set_libdirs(module=args.module_dir,
+                                osm2pgsql=args.osm2pgsql_path,
+                                php=args.phplib_dir,
+                                sql=args.sqllib_dir,
+                                data=args.data_dir)
 
         log = logging.getLogger()
         log.warning('Using project directory: %s', str(args.project_dir))

nominatim/config.py

@@ -39,6 +39,16 @@ class Configuration:
             self._config['NOMINATIM_ADDRESS_LEVEL_CONFIG'] = \
                 str(config_dir / 'address-levels.json')
 
+        class _LibDirs: # pylint: disable=too-few-public-methods
+            pass
+
+        self.lib_dir = _LibDirs()
+
+    def set_libdirs(self, **kwargs):
+        """ Set paths to library functions and data.
+        """
+        for key, value in kwargs.items():
+            setattr(self.lib_dir, key, Path(value).resolve())
 
     def __getattr__(self, name):
         name = 'NOMINATIM_' + name