X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/c4f22a42eba499ed1854c5967b2e3932fe9b3896..5c2c0604805452f8235e7574b7e4986f9f89802e:/nominatim/config.py

diff --git a/nominatim/config.py b/nominatim/config.py
index 785f4acd..ef261079 100644
--- a/nominatim/config.py
+++ b/nominatim/config.py
@@ -18,7 +18,7 @@ from dotenv import dotenv_values
 from nominatim.errors import UsageError
 
 LOG = logging.getLogger()
-
+CONFIG_CACHE = {}
 
 def flatten_config_list(content, section=''):
     """ Flatten YAML configuration lists that contain include sections
@@ -144,7 +144,7 @@ class Configuration:
         style = self.__getattr__('IMPORT_STYLE')
 
         if style in ('admin', 'street', 'address', 'full', 'extratags'):
-            return self.config_dir / 'import-{}.style'.format(style)
+            return self.config_dir / f'import-{style}.style'
 
         return self.find_config_file('', 'IMPORT_STYLE')
 
@@ -181,14 +181,19 @@ class Configuration:
         """
         configfile = self.find_config_file(filename, config)
 
-        if configfile.suffix in ('.yaml', '.yml'):
-            return self._load_from_yaml(configfile)
+        if str(configfile) in CONFIG_CACHE:
+            return CONFIG_CACHE[str(configfile)]
 
-        if configfile.suffix == '.json':
-            with configfile.open('r') as cfg:
-                return json.load(cfg)
+        if configfile.suffix in ('.yaml', '.yml'):
+            result = self._load_from_yaml(configfile)
+        elif configfile.suffix == '.json':
+            with configfile.open('r', encoding='utf-8') as cfg:
+                result = json.load(cfg)
+        else:
+            raise UsageError(f"Config file '{configfile}' has unknown format.")
 
-        raise UsageError(f"Config file '{configfile}' has unknown format.")
+        CONFIG_CACHE[str(configfile)] = result
+        return result
 
 
     def find_config_file(self, filename, config=None):