add tests for migration

[nominatim.git] / nominatim / config.py

diff --git a/nominatim/config.py b/nominatim/config.py
index c859a9d1142cbb72e90da118b8bddb38c0d8415e..bc3556f3cdf101f722df036730eb7311d88c6474 100644 (file)
--- a/nominatim/config.py
+++ b/nominatim/config.py
@@ -4,6 +4,7 @@ Nominatim configuration accessor.
 import logging
 import os
 from pathlib import Path
+import json
 import yaml
 
 from dotenv import dotenv_values
@@ -12,6 +13,27 @@ from nominatim.errors import UsageError
 
 LOG = logging.getLogger()
 
+
+def flatten_config_list(content, section=''):
+    """ Flatten YAML configuration lists that contain include sections
+        which are lists themselves.
+    """
+    if not content:
+        return []
+
+    if not isinstance(content, list):
+        raise UsageError(f"List expected in section '{section}'.")
+
+    output = []
+    for ele in content:
+        if isinstance(ele, list):
+            output.extend(flatten_config_list(ele, section))
+        else:
+            output.append(ele)
+
+    return output
+
+
 class Configuration:
     """ Load and manage the project configuration.
 
@@ -34,12 +56,6 @@ class Configuration:
         if project_dir is not None and (project_dir / '.env').is_file():
             self._config.update(dotenv_values(str((project_dir / '.env').resolve())))
 
-        # Add defaults for variables that are left empty to set the default.
-        # They may still be overwritten by environment variables.
-        if not self._config['NOMINATIM_ADDRESS_LEVEL_CONFIG']:
-            self._config['NOMINATIM_ADDRESS_LEVEL_CONFIG'] = \
-                str(config_dir / 'address-levels.json')
-
         class _LibDirs:
             pass
 
@@ -54,7 +70,10 @@ class Configuration:
     def __getattr__(self, name):
         name = 'NOMINATIM_' + name
 
-        return self.environ.get(name) or self._config[name]
+        if name in self.environ:
+            return self.environ[name]
+
+        return self._config[name]
 
     def get_bool(self, name):
         """ Return the given configuration parameter as a boolean.
@@ -74,6 +93,23 @@ class Configuration:
             raise UsageError("Configuration error.") from exp
 
 
+    def get_path(self, name):
+        """ Return the given configuration parameter as a Path.
+            If a relative path is configured, then the function converts this
+            into an absolute path with the project directory as root path.
+            If the configuration is unset, a falsy value is returned.
+        """
+        value = self.__getattr__(name)
+        if value:
+            value = Path(value)
+
+            if not value.is_absolute():
+                value = self.project_dir / value
+
+            value = value.resolve()
+
+        return value
+
     def get_libpq_dsn(self):
         """ Get configured database DSN converted into the key/value format
             understood by libpq and psycopg.
@@ -104,7 +140,7 @@ class Configuration:
         if style in ('admin', 'street', 'address', 'full', 'extratags'):
             return self.config_dir / 'import-{}.style'.format(style)
 
-        return Path(style)
+        return self.find_config_file('', 'IMPORT_STYLE')
 
 
     def get_os_env(self):
@@ -137,17 +173,19 @@ class Configuration:
             is loaded using this function and added at the position in the
             configuration tree.
         """
-        configfile = self._find_config_file(filename, config)
+        configfile = self.find_config_file(filename, config)
 
-        if configfile.suffix != '.yaml':
-            LOG.format("Format error while reading '%s': only YAML format supported.",
-                       configfile)
-            raise UsageError("Cannot handle config file format.")
+        if configfile.suffix in ('.yaml', '.yml'):
+            return self._load_from_yaml(configfile)
+
+        if configfile.suffix == '.json':
+            with configfile.open('r') as cfg:
+                return json.load(cfg)
 
-        return self._load_from_yaml(configfile)
+        raise UsageError(f"Config file '{configfile}' has unknown format.")
 
 
-    def _find_config_file(self, filename, config=None):
+    def find_config_file(self, filename, config=None):
         """ Resolve the location of a configuration file given a filename and
             an optional configuration option with the file name.
             Raises a UsageError when the file cannot be found or is not
@@ -158,21 +196,21 @@ class Configuration:
             if cfg_filename:
                 cfg_filename = Path(cfg_filename)
 
-                if not cfg_filename.is_absolute():
-                    cfg_filename = self.project_dir / cfg_filename
+                if cfg_filename.is_absolute():
+                    cfg_filename = cfg_filename.resolve()
 
-                cfg_filename = cfg_filename.resolve()
+                    if not cfg_filename.is_file():
+                        LOG.fatal("Cannot find config file '%s'.", cfg_filename)
+                        raise UsageError("Config file not found.")
 
-                if not cfg_filename.is_file():
-                    LOG.fatal("Cannot find config file '%s'.", cfg_filename)
-                    raise UsageError("Config file not found.")
+                    return cfg_filename
 
-                return cfg_filename
+                filename = cfg_filename
 
 
         search_paths = [self.project_dir, self.config_dir]
         for path in search_paths:
-            if (path / filename).is_file():
+            if path is not None and (path / filename).is_file():
                 return path / filename
 
         LOG.fatal("Configuration file '%s' not found.\nDirectories searched: %s",
@@ -200,11 +238,11 @@ class Configuration:
         if Path(fname).is_absolute():
             configfile = Path(fname)
         else:
-            configfile = self._find_config_file(loader.construct_scalar(node))
+            configfile = self.find_config_file(loader.construct_scalar(node))
 
         if configfile.suffix != '.yaml':
-            LOG.format("Format error while reading '%s': only YAML format supported.",
-                       configfile)
+            LOG.fatal("Format error while reading '%s': only YAML format supported.",
+                      configfile)
             raise UsageError("Cannot handle config file format.")
 
         return yaml.safe_load(configfile.read_text(encoding='utf-8'))