X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/4cb6dc01f382e9fb748efbe4517442af2274f210..5ecae1071397c24c6333e82a842dbb55c5e0bc36:/nominatim/config.py

diff --git a/nominatim/config.py b/nominatim/config.py
index 271d2d4d..a22f90ab 100644
--- a/nominatim/config.py
+++ b/nominatim/config.py
@@ -7,6 +7,8 @@ from pathlib import Path
 
 from dotenv import dotenv_values
 
+from .errors import UsageError
+
 LOG = logging.getLogger()
 
 class Configuration:
@@ -15,7 +17,7 @@ class Configuration:
         Nominatim uses dotenv to configure the software. Configuration options
         are resolved in the following order:
 
-         * from the OS environment
+         * from the OS environment (or the dirctionary given in `environ`
          * from the .env file in the project directory of the installation
          * from the default installation in the configuration directory
 
@@ -23,7 +25,8 @@ class Configuration:
         avoid conflicts with other environment variables.
     """
 
-    def __init__(self, project_dir, config_dir):
+    def __init__(self, project_dir, config_dir, environ=None):
+        self.environ = environ or os.environ
         self.project_dir = project_dir
         self.config_dir = config_dir
         self._config = dotenv_values(str((config_dir / 'env.defaults').resolve()))
@@ -40,7 +43,7 @@ class Configuration:
     def __getattr__(self, name):
         name = 'NOMINATIM_' + name
 
-        return os.environ.get(name) or self._config[name]
+        return self.environ.get(name) or self._config[name]
 
     def get_bool(self, name):
         """ Return the given configuration parameter as a boolean.
@@ -57,7 +60,7 @@ class Configuration:
             return int(self.__getattr__(name))
         except ValueError:
             LOG.fatal("Invalid setting NOMINATIM_%s. Needs to be a number.", name)
-            raise
+            raise UsageError("Configuration error.")
 
 
     def get_libpq_dsn(self):
@@ -98,6 +101,6 @@ class Configuration:
             merged in.
         """
         env = dict(self._config)
-        env.update(os.environ)
+        env.update(self.environ)
 
         return env