X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/95ed95c616d41975595c97bb1bc87ee7ecff8378..df6eddebcd74982092477357ecf4a457a9acf561:/nominatim/config.py diff --git a/nominatim/config.py b/nominatim/config.py index ed7d35e2..3344a425 100644 --- a/nominatim/config.py +++ b/nominatim/config.py @@ -7,18 +7,21 @@ """ Nominatim configuration accessor. """ -from typing import Dict, Any, List, Mapping, Optional, Union +from typing import Dict, Any, List, Mapping, Optional +import importlib.util import logging import os +import sys from pathlib import Path import json import yaml from dotenv import dotenv_values +from psycopg2.extensions import parse_dsn +from nominatim.typing import StrPath from nominatim.errors import UsageError - -PathOrStr = Union[str, os.PathLike[str]] +import nominatim.paths LOG = logging.getLogger() CONFIG_CACHE : Dict[str, Any] = {} @@ -44,39 +47,43 @@ def flatten_config_list(content: Any, section: str = '') -> List[Any]: class Configuration: - """ Load and manage the project configuration. - - Nominatim uses dotenv to configure the software. Configuration options - are resolved in the following order: - - * 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 + """ This class wraps access to the configuration settings + for the Nominatim instance in use. All Nominatim configuration options are prefixed with 'NOMINATIM_' to - avoid conflicts with other environment variables. + avoid conflicts with other environment variables. All settings can + be accessed as properties of the class under the same name as the + setting but with the `NOMINATIM_` prefix removed. In addition, there + are accessor functions that convert the setting values to types + other than string. """ - def __init__(self, project_dir: Path, config_dir: Path, + def __init__(self, project_dir: Optional[Path], environ: Optional[Mapping[str, str]] = None) -> 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())) - if project_dir is not None and (project_dir / '.env').is_file(): - self._config.update(dotenv_values(str((project_dir / '.env').resolve()))) + self.config_dir = nominatim.paths.CONFIG_DIR + self._config = dotenv_values(str(self.config_dir / 'env.defaults')) + if self.project_dir is not None and (self.project_dir / '.env').is_file(): + self.project_dir = self.project_dir.resolve() + self._config.update(dotenv_values(str(self.project_dir / '.env'))) class _LibDirs: - pass + module: Path + osm2pgsql: Path + php = nominatim.paths.PHPLIB_DIR + sql = nominatim.paths.SQLLIB_DIR + data = nominatim.paths.DATA_DIR self.lib_dir = _LibDirs() + self._private_plugins: Dict[str, object] = {} - def set_libdirs(self, **kwargs: PathOrStr) -> None: + def set_libdirs(self, **kwargs: StrPath) -> None: """ Set paths to library functions and data. """ for key, value in kwargs.items(): - setattr(self.lib_dir, key, Path(value).resolve()) + setattr(self.lib_dir, key, Path(value)) def __getattr__(self, name: str) -> str: @@ -90,14 +97,29 @@ class Configuration: def get_bool(self, name: str) -> bool: """ Return the given configuration parameter as a boolean. - Values of '1', 'yes' and 'true' are accepted as truthy values, - everything else is interpreted as false. + + Parameters: + name: Name of the configuration parameter with the NOMINATIM_ + prefix removed. + + Returns: + `True` for values of '1', 'yes' and 'true', `False` otherwise. """ return getattr(self, name).lower() in ('1', 'yes', 'true') def get_int(self, name: str) -> int: """ Return the given configuration parameter as an int. + + Parameters: + name: Name of the configuration parameter with the NOMINATIM_ + prefix removed. + + Returns: + The configuration value converted to int. + + Raises: + ValueError: when the value is not a number. """ try: return int(getattr(self, name)) @@ -109,8 +131,17 @@ class Configuration: def get_str_list(self, name: str) -> Optional[List[str]]: """ Return the given configuration parameter as a list of strings. The values are assumed to be given as a comma-sparated list and - will be stripped before returning them. On empty values None - is returned. + will be stripped before returning them. + + Parameters: + name: Name of the configuration parameter with the NOMINATIM_ + prefix removed. + + Returns: + (List[str]): The comma-split parameter as a list. The + elements are stripped of leading and final spaces before + being returned. + (None): The configuration parameter was unset or empty. """ raw = getattr(self, name) @@ -119,9 +150,16 @@ class Configuration: def get_path(self, name: str) -> Optional[Path]: """ 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, None is returned. + + Parameters: + name: Name of the configuration parameter with the NOMINATIM_ + prefix removed. + + Returns: + (Path): A Path object of the parameter value. + If a relative path is configured, then the function converts this + into an absolute path with the project directory as root path. + (None): The configuration parameter was unset or empty. """ value = getattr(self, name) if not value: @@ -130,6 +168,7 @@ class Configuration: cfgpath = Path(value) if not cfgpath.is_absolute(): + assert self.project_dir is not None cfgpath = self.project_dir / cfgpath return cfgpath.resolve() @@ -155,6 +194,18 @@ class Configuration: return dsn + def get_database_params(self) -> Mapping[str, str]: + """ Get the configured parameters for the database connection + as a mapping. + """ + dsn = self.DATABASE_DSN + + if dsn.startswith('pgsql:'): + return dict((p.split('=', 1) for p in dsn[6:].split(';'))) + + return parse_dsn(dsn) + + def get_import_style_file(self) -> Path: """ Return the import style file as a path object. Translates the name of the standard styles automatically into a file in the @@ -163,26 +214,26 @@ class Configuration: style = getattr(self, 'IMPORT_STYLE') if style in ('admin', 'street', 'address', 'full', 'extratags'): - return self.config_dir / f'import-{style}.style' + return self.config_dir / f'import-{style}.lua' return self.find_config_file('', 'IMPORT_STYLE') - def get_os_env(self) -> Dict[str, Optional[str]]: + def get_os_env(self) -> Dict[str, str]: """ Return a copy of the OS environment with the Nominatim configuration merged in. """ - env = dict(self._config) + env = {k: v for k, v in self._config.items() if v is not None} env.update(self.environ) return env - def load_sub_configuration(self, filename: PathOrStr, + def load_sub_configuration(self, filename: StrPath, config: Optional[str] = None) -> Any: """ Load additional configuration from a file. `filename` is the name of the configuration file. The file is first searched in the - project directory and then in the global settings dirctory. + project directory and then in the global settings directory. If `config` is set, then the name of the configuration file can be additionally given through a .env configuration option. When @@ -216,7 +267,50 @@ class Configuration: return result - def find_config_file(self, filename: PathOrStr, + def load_plugin_module(self, module_name: str, internal_path: str) -> Any: + """ Load a Python module as a plugin. + + The module_name may have three variants: + + * A name without any '.' is assumed to be an internal module + and will be searched relative to `internal_path`. + * If the name ends in `.py`, module_name is assumed to be a + file name relative to the project directory. + * Any other name is assumed to be an absolute module name. + + In either of the variants the module name must start with a letter. + """ + if not module_name or not module_name[0].isidentifier(): + raise UsageError(f'Invalid module name {module_name}') + + if '.' not in module_name: + module_name = module_name.replace('-', '_') + full_module = f'{internal_path}.{module_name}' + return sys.modules.get(full_module) or importlib.import_module(full_module) + + if module_name.endswith('.py'): + if self.project_dir is None or not (self.project_dir / module_name).exists(): + raise UsageError(f"Cannot find module '{module_name}' in project directory.") + + if module_name in self._private_plugins: + return self._private_plugins[module_name] + + file_path = str(self.project_dir / module_name) + spec = importlib.util.spec_from_file_location(module_name, file_path) + if spec: + module = importlib.util.module_from_spec(spec) + # Do not add to global modules because there is no standard + # module name that Python can resolve. + self._private_plugins[module_name] = module + assert spec.loader is not None + spec.loader.exec_module(module) + + return module + + return sys.modules.get(module_name) or importlib.import_module(module_name) + + + def find_config_file(self, filename: StrPath, config: Optional[str] = None) -> Path: """ Resolve the location of a configuration file given a filename and an optional configuration option with the file name. @@ -263,7 +357,7 @@ class Configuration: """ Handler for the '!include' operator in YAML files. When the filename is relative, then the file is first searched in the - project directory and then in the global settings dirctory. + project directory and then in the global settings directory. """ fname = loader.construct_scalar(node)