2 Nominatim configuration accessor.
6 from pathlib import Path
9 from dotenv import dotenv_values
11 from nominatim.errors import UsageError
13 LOG = logging.getLogger()
16 """ Load and manage the project configuration.
18 Nominatim uses dotenv to configure the software. Configuration options
19 are resolved in the following order:
21 * from the OS environment (or the dirctionary given in `environ`
22 * from the .env file in the project directory of the installation
23 * from the default installation in the configuration directory
25 All Nominatim configuration options are prefixed with 'NOMINATIM_' to
26 avoid conflicts with other environment variables.
29 def __init__(self, project_dir, config_dir, environ=None):
30 self.environ = environ or os.environ
31 self.project_dir = project_dir
32 self.config_dir = config_dir
33 self._config = dotenv_values(str((config_dir / 'env.defaults').resolve()))
34 if project_dir is not None and (project_dir / '.env').is_file():
35 self._config.update(dotenv_values(str((project_dir / '.env').resolve())))
37 # Add defaults for variables that are left empty to set the default.
38 # They may still be overwritten by environment variables.
39 if not self._config['NOMINATIM_ADDRESS_LEVEL_CONFIG']:
40 self._config['NOMINATIM_ADDRESS_LEVEL_CONFIG'] = \
41 str(config_dir / 'address-levels.json')
46 self.lib_dir = _LibDirs()
48 def set_libdirs(self, **kwargs):
49 """ Set paths to library functions and data.
51 for key, value in kwargs.items():
52 setattr(self.lib_dir, key, Path(value).resolve())
54 def __getattr__(self, name):
55 name = 'NOMINATIM_' + name
57 return self.environ.get(name) or self._config[name]
59 def get_bool(self, name):
60 """ Return the given configuration parameter as a boolean.
61 Values of '1', 'yes' and 'true' are accepted as truthy values,
62 everything else is interpreted as false.
64 return self.__getattr__(name).lower() in ('1', 'yes', 'true')
67 def get_int(self, name):
68 """ Return the given configuration parameter as an int.
71 return int(self.__getattr__(name))
72 except ValueError as exp:
73 LOG.fatal("Invalid setting NOMINATIM_%s. Needs to be a number.", name)
74 raise UsageError("Configuration error.") from exp
77 def get_libpq_dsn(self):
78 """ Get configured database DSN converted into the key/value format
79 understood by libpq and psycopg.
81 dsn = self.DATABASE_DSN
83 def quote_param(param):
84 key, val = param.split('=')
85 val = val.replace('\\', '\\\\').replace("'", "\\'")
88 return key + '=' + val
90 if dsn.startswith('pgsql:'):
91 # Old PHP DSN format. Convert before returning.
92 return ' '.join([quote_param(p) for p in dsn[6:].split(';')])
97 def get_import_style_file(self):
98 """ Return the import style file as a path object. Translates the
99 name of the standard styles automatically into a file in the
102 style = self.__getattr__('IMPORT_STYLE')
104 if style in ('admin', 'street', 'address', 'full', 'extratags'):
105 return self.config_dir / 'import-{}.style'.format(style)
110 def get_os_env(self):
111 """ Return a copy of the OS environment with the Nominatim configuration
114 env = dict(self._config)
115 env.update(self.environ)
120 def load_sub_configuration(self, filename, config=None):
121 """ Load additional configuration from a file. `filename` is the name
122 of the configuration file. The file is first searched in the
123 project directory and then in the global settings dirctory.
125 If `config` is set, then the name of the configuration file can
126 be additionally given through a .env configuration option. When
127 the option is set, then the file will be exclusively loaded as set:
128 if the name is an absolute path, the file name is taken as is,
129 if the name is relative, it is taken to be relative to the
132 The format of the file is determined from the filename suffix.
133 Currently only files with extension '.yaml' are supported.
135 YAML files support a special '!include' construct. When the
136 directive is given, the value is taken to be a filename, the file
137 is loaded using this function and added at the position in the
140 configfile = self._find_config_file(filename, config)
142 if configfile.suffix != '.yaml':
143 LOG.format("Format error while reading '%s': only YAML format supported.",
145 raise UsageError("Cannot handle config file format.")
147 return self._load_from_yaml(configfile)
150 def _find_config_file(self, filename, config=None):
151 """ Resolve the location of a configuration file given a filename and
152 an optional configuration option with the file name.
153 Raises a UsageError when the file cannot be found or is not
156 if config is not None:
157 cfg_filename = self.__getattr__(config)
159 cfg_filename = Path(cfg_filename)
161 if not cfg_filename.is_absolute():
162 cfg_filename = self.project_dir / cfg_filename
164 cfg_filename = cfg_filename.resolve()
166 if not cfg_filename.is_file():
167 LOG.fatal("Cannot find config file '%s'.", cfg_filename)
168 raise UsageError("Config file not found.")
173 search_paths = [self.project_dir, self.config_dir]
174 for path in search_paths:
175 if (path / filename).is_file():
176 return path / filename
178 LOG.fatal("Configuration file '%s' not found.\nDirectories searched: %s",
179 filename, search_paths)
180 raise UsageError("Config file not found.")
183 def _load_from_yaml(self, cfgfile):
184 """ Load a YAML configuration file. This installs a special handler that
185 allows to include other YAML files using the '!include' operator.
187 yaml.add_constructor('!include', self._yaml_include_representer,
188 Loader=yaml.SafeLoader)
189 return yaml.safe_load(cfgfile.read_text(encoding='utf-8'))
192 def _yaml_include_representer(self, loader, node):
193 """ Handler for the '!include' operator in YAML files.
195 When the filename is relative, then the file is first searched in the
196 project directory and then in the global settings dirctory.
198 fname = loader.construct_scalar(node)
200 if Path(fname).is_absolute():
201 configfile = Path(fname)
203 configfile = self._find_config_file(loader.construct_scalar(node))
205 if configfile.suffix != '.yaml':
206 LOG.format("Format error while reading '%s': only YAML format supported.",
208 raise UsageError("Cannot handle config file format.")
210 return yaml.safe_load(configfile.read_text(encoding='utf-8'))