Загрузить файлы в «venv/Lib/site-packages/pydantic_settings/sources/providers»

venv/Lib/site-packages/pydantic_settings/sources/providers/env.py

@@ -0,0 +1,329 @@
+from __future__ import annotations as _annotations
+
+import json
+import os
+from collections.abc import Mapping
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    get_args,
+    get_origin,
+)
+
+from pydantic import Json, TypeAdapter, ValidationError
+from pydantic._internal._utils import deep_update, is_model_class
+from pydantic.dataclasses import is_pydantic_dataclass
+from pydantic.fields import FieldInfo
+from typing_inspection.introspection import is_union_origin
+
+from ...utils import _lenient_issubclass
+from ..base import PydanticBaseEnvSettingsSource
+from ..types import EnvNoneType, EnvPrefixTarget
+from ..utils import (
+    _annotation_contains_types,
+    _annotation_enum_name_to_val,
+    _annotation_is_complex,
+    _get_model_fields,
+    _literal_has_numeric_enum,
+    _union_has_strict_types,
+    _union_is_complex,
+    parse_env_vars,
+)
+
+if TYPE_CHECKING:
+    from pydantic_settings.main import BaseSettings
+
+
+class EnvSettingsSource(PydanticBaseEnvSettingsSource):
+    """
+    Source class for loading settings values from environment variables.
+    """
+
+    def __init__(
+        self,
+        settings_cls: type[BaseSettings],
+        case_sensitive: bool | None = None,
+        env_prefix: str | None = None,
+        env_prefix_target: EnvPrefixTarget | None = None,
+        env_nested_delimiter: str | None = None,
+        env_nested_max_split: int | None = None,
+        env_ignore_empty: bool | None = None,
+        env_parse_none_str: str | None = None,
+        env_parse_enums: bool | None = None,
+    ) -> None:
+        super().__init__(
+            settings_cls,
+            case_sensitive,
+            env_prefix,
+            env_prefix_target,
+            env_ignore_empty,
+            env_parse_none_str,
+            env_parse_enums,
+        )
+        self.env_nested_delimiter = (
+            env_nested_delimiter if env_nested_delimiter is not None else self.config.get('env_nested_delimiter')
+        )
+        self.env_nested_max_split = (
+            env_nested_max_split if env_nested_max_split is not None else self.config.get('env_nested_max_split')
+        )
+        self.maxsplit = (self.env_nested_max_split or 0) - 1
+        self.env_prefix_len = len(self.env_prefix)
+
+        self.env_vars = self._load_env_vars()
+
+    def _load_env_vars(self) -> Mapping[str, str | None]:
+        return parse_env_vars(os.environ, self.case_sensitive, self.env_ignore_empty, self.env_parse_none_str)
+
+    def get_field_value(self, field: FieldInfo, field_name: str) -> tuple[Any, str, bool]:
+        """
+        Gets the value for field from environment variables and a flag to determine whether value is complex.
+
+        Args:
+            field: The field.
+            field_name: The field name.
+
+        Returns:
+            A tuple that contains the value (`None` if not found), key, and
+                a flag to determine whether value is complex.
+        """
+
+        env_val: str | None = None
+        for field_key, env_name, value_is_complex in self._extract_field_info(field, field_name):
+            env_val = self.env_vars.get(env_name)
+            if env_val is not None:
+                break
+
+        return env_val, field_key, value_is_complex
+
+    def prepare_field_value(self, field_name: str, field: FieldInfo, value: Any, value_is_complex: bool) -> Any:
+        """
+        Prepare value for the field.
+
+        * Extract value for nested field.
+        * Deserialize value to python object for complex field.
+
+        Args:
+            field: The field.
+            field_name: The field name.
+
+        Returns:
+            A tuple contains prepared value for the field.
+
+        Raises:
+            ValuesError: When There is an error in deserializing value for complex field.
+        """
+        is_complex, allow_parse_failure = self._field_is_complex(field)
+        if self.env_parse_enums:
+            enum_val = _annotation_enum_name_to_val(field.annotation, value)
+            value = value if enum_val is None else enum_val
+
+        if is_complex or value_is_complex:
+            if isinstance(value, EnvNoneType):
+                return value
+            elif value is None:
+                # field is complex but no value found so far, try explode_env_vars
+                env_val_built = self.explode_env_vars(field_name, field, self.env_vars)
+                if env_val_built:
+                    return env_val_built
+            else:
+                # field is complex and there's a value, decode that as JSON, then add explode_env_vars
+                try:
+                    value = self.decode_complex_value(field_name, field, value)
+                except ValueError as e:
+                    if not allow_parse_failure:
+                        raise e
+
+                if isinstance(value, dict):
+                    return deep_update(value, self.explode_env_vars(field_name, field, self.env_vars))
+                else:
+                    return value
+        elif value is not None:
+            # simplest case, field is not complex, we only need to add the value if it was found
+            return self._coerce_env_val_strict(field, value)
+
+    def _field_is_complex(self, field: FieldInfo) -> tuple[bool, bool]:
+        """
+        Find out if a field is complex, and if so whether JSON errors should be ignored
+        """
+        if self.field_is_complex(field):
+            allow_parse_failure = False
+        elif is_union_origin(get_origin(field.annotation)) and _union_is_complex(field.annotation, field.metadata):
+            allow_parse_failure = True
+        else:
+            return False, False
+
+        return True, allow_parse_failure
+
+    # Default value of `case_sensitive` is `None`, because we don't want to break existing behavior.
+    # We have to change the method to a non-static method and use
+    # `self.case_sensitive` instead in V3.
+    def next_field(
+        self, field: FieldInfo | Any | None, key: str, case_sensitive: bool | None = None
+    ) -> FieldInfo | None:
+        """
+        Find the field in a sub model by key(env name)
+
+        By having the following models:
+
+            ```py
+            class SubSubModel(BaseSettings):
+                dvals: Dict
+
+            class SubModel(BaseSettings):
+                vals: list[str]
+                sub_sub_model: SubSubModel
+
+            class Cfg(BaseSettings):
+                sub_model: SubModel
+            ```
+
+        Then:
+            next_field(sub_model, 'vals') Returns the `vals` field of `SubModel` class
+            next_field(sub_model, 'sub_sub_model') Returns `sub_sub_model` field of `SubModel` class
+
+        Args:
+            field: The field.
+            key: The key (env name).
+            case_sensitive: Whether to search for key case sensitively.
+
+        Returns:
+            Field if it finds the next field otherwise `None`.
+        """
+        if not field:
+            return None
+
+        annotation = field.annotation if isinstance(field, FieldInfo) else field
+        for type_ in get_args(annotation):
+            type_has_key = self.next_field(type_, key, case_sensitive)
+            if type_has_key:
+                return type_has_key
+        if _lenient_issubclass(get_origin(annotation), dict):
+            # get value type if it's a dict
+            return get_args(annotation)[-1]
+        elif is_model_class(annotation) or is_pydantic_dataclass(annotation):  # type: ignore[arg-type]
+            fields = _get_model_fields(annotation)
+            # `case_sensitive is None` is here to be compatible with the old behavior.
+            # Has to be removed in V3.
+            for field_name, f in fields.items():
+                for _, env_name, _ in self._extract_field_info(f, field_name):
+                    if case_sensitive is None or case_sensitive:
+                        if field_name == key or env_name == key:
+                            return f
+                    elif field_name.lower() == key.lower() or env_name.lower() == key.lower():
+                        return f
+        return None
+
+    def explode_env_vars(self, field_name: str, field: FieldInfo, env_vars: Mapping[str, str | None]) -> dict[str, Any]:  # noqa: C901
+        """
+        Process env_vars and extract the values of keys containing env_nested_delimiter into nested dictionaries.
+
+        This is applied to a single field, hence filtering by env_var prefix.
+
+        Args:
+            field_name: The field name.
+            field: The field.
+            env_vars: Environment variables.
+
+        Returns:
+            A dictionary contains extracted values from nested env values.
+        """
+        if not self.env_nested_delimiter:
+            return {}
+
+        ann = field.annotation
+        is_dict = ann is dict or _lenient_issubclass(get_origin(ann), dict)
+
+        prefixes = [
+            f'{env_name}{self.env_nested_delimiter}' for _, env_name, _ in self._extract_field_info(field, field_name)
+        ]
+        result: dict[str, Any] = {}
+        for env_name, env_val in env_vars.items():
+            try:
+                prefix = next(prefix for prefix in prefixes if env_name.startswith(prefix))
+            except StopIteration:
+                continue
+            # we remove the prefix before splitting in case the prefix has characters in common with the delimiter
+            env_name_without_prefix = env_name[len(prefix) :]
+            *keys, last_key = env_name_without_prefix.split(self.env_nested_delimiter, self.maxsplit)
+            env_var = result
+            target_field: FieldInfo | None = field
+            for key in keys:
+                target_field = self.next_field(target_field, key, self.case_sensitive)
+                if isinstance(env_var, dict):
+                    env_var = env_var.setdefault(key, {})
+
+            # get proper field with last_key
+            target_field = self.next_field(target_field, last_key, self.case_sensitive)
+
+            # check if env_val maps to a complex field and if so, parse the env_val
+            if (target_field or is_dict) and env_val:
+                if isinstance(target_field, FieldInfo):
+                    is_complex, allow_json_failure = self._field_is_complex(target_field)
+                    if self.env_parse_enums:
+                        enum_val = _annotation_enum_name_to_val(target_field.annotation, env_val)
+                        env_val = env_val if enum_val is None else enum_val
+                elif target_field:
+                    # target_field is a raw type (e.g. from dict value type annotation)
+                    is_complex = _annotation_is_complex(target_field, [])
+                    allow_json_failure = True
+                else:
+                    # nested field type is dict
+                    is_complex, allow_json_failure = True, True
+                if is_complex:
+                    try:
+                        field_info = target_field if isinstance(target_field, FieldInfo) else None
+                        env_val = self.decode_complex_value(last_key, field_info, env_val)  # type: ignore
+                    except ValueError as e:
+                        if not allow_json_failure:
+                            raise e
+            if isinstance(env_var, dict):
+                if last_key not in env_var or not isinstance(env_val, EnvNoneType) or env_var[last_key] == {}:
+                    env_var[last_key] = self._coerce_env_val_strict(target_field, env_val)
+        return result
+
+    def _coerce_env_val_strict(self, field: FieldInfo | None, value: Any) -> Any:
+        """
+        Coerce environment string values based on field annotation if model config is `strict=True`
+        or if the field annotation contains strict-annotated types (e.g. Optional[StrictBool]).
+
+        Args:
+            field: The field.
+            value: The value to coerce.
+
+        Returns:
+            The coerced value if successful, otherwise the original value.
+        """
+        try:
+            should_coerce = self.config.get('strict')
+            if not should_coerce and isinstance(field, FieldInfo):
+                should_coerce = (
+                    is_union_origin(get_origin(field.annotation)) and _union_has_strict_types(field.annotation)
+                ) or _literal_has_numeric_enum(field.annotation)
+            if should_coerce and isinstance(value, str) and isinstance(field, FieldInfo):
+                if value == self.env_parse_none_str:
+                    return value
+                if not _annotation_contains_types(field.annotation, (Json,), is_instance=True):
+                    try:
+                        return TypeAdapter(field.annotation).validate_python(value)
+                    except ValidationError:
+                        # Try JSON decoding as fallback (e.g. 'true' -> True for StrictBool)
+                        try:
+                            decoded = json.loads(value)
+                        except (ValueError, json.JSONDecodeError):
+                            raise
+                        if not isinstance(decoded, str):
+                            return TypeAdapter(field.annotation).validate_python(decoded)
+                        raise
+        except ValidationError:
+            # Allow validation error to be raised at time of instantiation
+            pass
+        return value
+
+    def __repr__(self) -> str:
+        return (
+            f'{self.__class__.__name__}(env_nested_delimiter={self.env_nested_delimiter!r}, '
+            f'env_prefix_len={self.env_prefix_len!r})'
+        )
+
+
+__all__ = ['EnvSettingsSource']

venv/Lib/site-packages/pydantic_settings/sources/providers/gcp.py

@@ -0,0 +1,241 @@
+from __future__ import annotations as _annotations
+
+import warnings
+from collections.abc import Iterator, Mapping
+from functools import cached_property
+from typing import TYPE_CHECKING, Any
+
+from pydantic.fields import FieldInfo
+
+from ..types import SecretVersion
+from .env import EnvSettingsSource
+
+if TYPE_CHECKING:
+    from google.auth import default as google_auth_default
+    from google.auth.credentials import Credentials
+    from google.cloud.secretmanager import SecretManagerServiceClient
+
+    from pydantic_settings.main import BaseSettings
+else:
+    Credentials = None
+    SecretManagerServiceClient = None
+    google_auth_default = None
+
+
+def import_gcp_secret_manager() -> None:
+    global Credentials
+    global SecretManagerServiceClient
+    global google_auth_default
+
+    try:
+        from google.auth import default as google_auth_default
+        from google.auth.credentials import Credentials
+
+        with warnings.catch_warnings():
+            warnings.filterwarnings('ignore', category=FutureWarning)
+            from google.cloud.secretmanager import SecretManagerServiceClient
+    except ImportError as e:  # pragma: no cover
+        raise ImportError(
+            'GCP Secret Manager dependencies are not installed, run `pip install pydantic-settings[gcp-secret-manager]`'
+        ) from e
+
+
+class GoogleSecretManagerMapping(Mapping[str, str | None]):
+    _loaded_secrets: dict[str, str | None]
+    _secret_client: SecretManagerServiceClient
+
+    def __init__(self, secret_client: SecretManagerServiceClient, project_id: str, case_sensitive: bool) -> None:
+        self._loaded_secrets = {}
+        self._secret_client = secret_client
+        self._project_id = project_id
+        self._case_sensitive = case_sensitive
+
+    @property
+    def _gcp_project_path(self) -> str:
+        return self._secret_client.common_project_path(self._project_id)
+
+    def _select_case_insensitive_secret(self, lower_name: str, candidates: list[str]) -> str:
+        if len(candidates) == 1:
+            return candidates[0]
+
+        # Sort to ensure deterministic selection (prefer lowercase / ASCII last)
+        candidates.sort()
+        winner = candidates[-1]
+        warnings.warn(
+            f"Secret collision: Found multiple secrets {candidates} normalizing to '{lower_name}'. "
+            f"Using '{winner}' for case-insensitive lookup.",
+            UserWarning,
+            stacklevel=2,
+        )
+        return winner
+
+    @cached_property
+    def _secret_name_map(self) -> dict[str, str]:
+        mapping: dict[str, str] = {}
+        # Group secrets by normalized name to detect collisions
+        normalized_groups: dict[str, list[str]] = {}
+
+        secrets = self._secret_client.list_secrets(parent=self._gcp_project_path)
+        for secret in secrets:
+            name = self._secret_client.parse_secret_path(secret.name).get('secret', '')
+            mapping[name] = name
+
+            if not self._case_sensitive:
+                lower_name = name.lower()
+                if lower_name not in normalized_groups:
+                    normalized_groups[lower_name] = []
+                normalized_groups[lower_name].append(name)
+
+        if not self._case_sensitive:
+            for lower_name, candidates in normalized_groups.items():
+                mapping[lower_name] = self._select_case_insensitive_secret(lower_name, candidates)
+
+        return mapping
+
+    @property
+    def _secret_names(self) -> list[str]:
+        return list(self._secret_name_map.keys())
+
+    def _secret_version_path(self, key: str, version: str = 'latest') -> str:
+        return self._secret_client.secret_version_path(self._project_id, key, version)
+
+    def _get_secret_value(self, gcp_secret_name: str, version: str = 'latest') -> str | None:
+        try:
+            return self._secret_client.access_secret_version(
+                name=self._secret_version_path(gcp_secret_name, version)
+            ).payload.data.decode('UTF-8')
+        except Exception:
+            return None
+
+    def __getitem__(self, key: str) -> str | None:
+        if key in self._loaded_secrets:
+            return self._loaded_secrets[key]
+
+        gcp_secret_name = self._secret_name_map.get(key)
+        if gcp_secret_name is None and not self._case_sensitive:
+            gcp_secret_name = self._secret_name_map.get(key.lower())
+
+        if gcp_secret_name:
+            self._loaded_secrets[key] = self._get_secret_value(gcp_secret_name)
+        else:
+            raise KeyError(key)
+
+        return self._loaded_secrets[key]
+
+    def __len__(self) -> int:
+        return len(self._secret_names)
+
+    def __iter__(self) -> Iterator[str]:
+        return iter(self._secret_names)
+
+
+class GoogleSecretManagerSettingsSource(EnvSettingsSource):
+    _credentials: Credentials
+    _secret_client: SecretManagerServiceClient
+    _project_id: str
+
+    def __init__(
+        self,
+        settings_cls: type[BaseSettings],
+        credentials: Credentials | None = None,
+        project_id: str | None = None,
+        env_prefix: str | None = None,
+        env_parse_none_str: str | None = None,
+        env_parse_enums: bool | None = None,
+        secret_client: SecretManagerServiceClient | None = None,
+        case_sensitive: bool | None = True,
+    ) -> None:
+        # Import Google Packages if they haven't already been imported
+        if SecretManagerServiceClient is None or Credentials is None or google_auth_default is None:
+            import_gcp_secret_manager()
+
+        # If credentials or project_id are not passed, then
+        # try to get them from the default function
+        if not credentials or not project_id:
+            _creds, _project_id = google_auth_default()
+
+        # Set the credentials and/or project id if they weren't specified
+        if credentials is None:
+            credentials = _creds
+
+        if project_id is None:
+            if isinstance(_project_id, str):
+                project_id = _project_id
+            else:
+                raise AttributeError(
+                    'project_id is required to be specified either as an argument or from the google.auth.default. See https://google-auth.readthedocs.io/en/master/reference/google.auth.html#google.auth.default'
+                )
+
+        self._credentials: Credentials = credentials
+        self._project_id: str = project_id
+
+        if secret_client:
+            self._secret_client = secret_client
+        else:
+            self._secret_client = SecretManagerServiceClient(credentials=self._credentials)
+
+        super().__init__(
+            settings_cls,
+            case_sensitive=case_sensitive,
+            env_prefix=env_prefix,
+            env_ignore_empty=False,
+            env_parse_none_str=env_parse_none_str,
+            env_parse_enums=env_parse_enums,
+        )
+
+    def get_field_value(self, field: FieldInfo, field_name: str) -> tuple[Any, str, bool]:
+        """Override get_field_value to get the secret value from GCP Secret Manager.
+        Look for a SecretVersion metadata field to specify a particular SecretVersion.
+
+        Args:
+            field: The field to get the value for
+            field_name: The declared name of the field
+
+        Returns:
+            A tuple of (value, key, value_is_complex), where `key` is the identifier used
+            to populate the model (either the field name or an alias, depending on
+            configuration).
+        """
+
+        secret_version = next((m.version for m in field.metadata if isinstance(m, SecretVersion)), None)
+
+        # If a secret version is specified, try to get that specific version of the secret from
+        # GCP Secret Manager via the GoogleSecretManagerMapping. This allows different versions
+        # of the same secret name to be retrieved independently and cached in the GoogleSecretManagerMapping
+        if secret_version and isinstance(self.env_vars, GoogleSecretManagerMapping):
+            for field_key, env_name, value_is_complex in self._extract_field_info(field, field_name):
+                gcp_secret_name = self.env_vars._secret_name_map.get(env_name)
+                if gcp_secret_name is None and not self.case_sensitive:
+                    gcp_secret_name = self.env_vars._secret_name_map.get(env_name.lower())
+
+                if gcp_secret_name:
+                    env_val = self.env_vars._get_secret_value(gcp_secret_name, secret_version)
+                    if env_val is not None:
+                        # If populate_by_name is enabled, return field_name to allow multiple fields
+                        # with the same alias but different versions to be distinguished
+                        if self.settings_cls.model_config.get('populate_by_name'):
+                            return env_val, field_name, value_is_complex
+                        return env_val, field_key, value_is_complex
+
+            # If a secret version is specified but not found, we should not fall back to "latest" (default behavior)
+            # as that would be incorrect. We return None to indicate the value was not found.
+            return None, field_name, False
+
+        val, key, is_complex = super().get_field_value(field, field_name)
+
+        # If populate_by_name is enabled, we need to return the field_name as the key
+        # without this being enabled, you cannot load two secrets with the same name but different versions
+        if self.settings_cls.model_config.get('populate_by_name') and val is not None:
+            return val, field_name, is_complex
+        return val, key, is_complex
+
+    def _load_env_vars(self) -> Mapping[str, str | None]:
+        return GoogleSecretManagerMapping(
+            self._secret_client, project_id=self._project_id, case_sensitive=self.case_sensitive
+        )
+
+    def __repr__(self) -> str:
+        return f'{self.__class__.__name__}(project_id={self._project_id!r}, env_nested_delimiter={self.env_nested_delimiter!r})'
+
+
+__all__ = ['GoogleSecretManagerSettingsSource', 'GoogleSecretManagerMapping']

venv/Lib/site-packages/pydantic_settings/sources/providers/json.py

@@ -0,0 +1,48 @@
+"""JSON file settings source."""
+
+from __future__ import annotations as _annotations
+
+import json
+from pathlib import Path
+from typing import (
+    TYPE_CHECKING,
+    Any,
+)
+
+from ..base import ConfigFileSourceMixin, InitSettingsSource
+from ..types import DEFAULT_PATH, PathType
+
+if TYPE_CHECKING:
+    from pydantic_settings.main import BaseSettings
+
+
+class JsonConfigSettingsSource(InitSettingsSource, ConfigFileSourceMixin):
+    """
+    A source class that loads variables from a JSON file
+    """
+
+    def __init__(
+        self,
+        settings_cls: type[BaseSettings],
+        json_file: PathType | None = DEFAULT_PATH,
+        json_file_encoding: str | None = None,
+        deep_merge: bool = False,
+    ):
+        self.json_file_path = json_file if json_file != DEFAULT_PATH else settings_cls.model_config.get('json_file')
+        self.json_file_encoding = (
+            json_file_encoding
+            if json_file_encoding is not None
+            else settings_cls.model_config.get('json_file_encoding')
+        )
+        self.json_data = self._read_files(self.json_file_path, deep_merge=deep_merge)
+        super().__init__(settings_cls, self.json_data)
+
+    def _read_file(self, file_path: Path) -> dict[str, Any]:
+        with file_path.open(encoding=self.json_file_encoding) as json_file:
+            return json.load(json_file)
+
+    def __repr__(self) -> str:
+        return f'{self.__class__.__name__}(json_file={self.json_file_path})'
+
+
+__all__ = ['JsonConfigSettingsSource']

venv/Lib/site-packages/pydantic_settings/sources/providers/nested_secrets.py

@@ -0,0 +1,210 @@
+import os
+import warnings
+from collections.abc import Iterator
+from functools import reduce
+from pathlib import Path
+from typing import TYPE_CHECKING, Any, Literal, Optional
+
+from ...exceptions import SettingsError
+from ...utils import path_type_label
+from ..base import PydanticBaseSettingsSource
+from ..utils import parse_env_vars
+from .env import EnvSettingsSource
+from .secrets import SecretsSettingsSource
+
+if TYPE_CHECKING:
+    from ...main import BaseSettings
+    from ...sources import PathType
+
+
+SECRETS_DIR_MAX_SIZE = 16 * 2**20  # 16 MiB seems to be a reasonable default
+
+
+class NestedSecretsSettingsSource(EnvSettingsSource):
+    def __init__(
+        self,
+        file_secret_settings: PydanticBaseSettingsSource | SecretsSettingsSource,
+        secrets_dir: Optional['PathType'] = None,
+        secrets_dir_missing: Literal['ok', 'warn', 'error'] | None = None,
+        secrets_dir_max_size: int | None = None,
+        secrets_case_sensitive: bool | None = None,
+        secrets_prefix: str | None = None,
+        secrets_nested_delimiter: str | None = None,
+        secrets_nested_subdir: bool | None = None,
+        # args for compatibility with SecretsSettingsSource, don't use directly
+        case_sensitive: bool | None = None,
+        env_prefix: str | None = None,
+    ) -> None:
+        # We allow the first argument to be settings_cls like original
+        # SecretsSettingsSource. However, it is recommended to pass
+        # SecretsSettingsSource instance instead (as it is shown in usage examples),
+        # otherwise `_secrets_dir` arg passed to Settings() constructor will be ignored.
+        settings_cls: type[BaseSettings] = getattr(
+            file_secret_settings,
+            'settings_cls',
+            file_secret_settings,  # type: ignore[arg-type]
+        )
+        # config options
+        conf = settings_cls.model_config
+        self.secrets_dir: PathType | None = first_not_none(
+            getattr(file_secret_settings, 'secrets_dir', None),
+            secrets_dir,
+            conf.get('secrets_dir'),
+        )
+        self.secrets_dir_missing: Literal['ok', 'warn', 'error'] = first_not_none(
+            secrets_dir_missing,
+            conf.get('secrets_dir_missing'),
+            'warn',
+        )
+        if self.secrets_dir_missing not in ('ok', 'warn', 'error'):
+            raise SettingsError(f'invalid secrets_dir_missing value: {self.secrets_dir_missing}')
+        self.secrets_dir_max_size: int = first_not_none(
+            secrets_dir_max_size,
+            conf.get('secrets_dir_max_size'),
+            SECRETS_DIR_MAX_SIZE,
+        )
+        self.case_sensitive: bool = first_not_none(
+            secrets_case_sensitive,
+            conf.get('secrets_case_sensitive'),
+            case_sensitive,
+            conf.get('case_sensitive'),
+            False,
+        )
+        self.secrets_prefix: str = first_not_none(
+            secrets_prefix,
+            conf.get('secrets_prefix'),
+            env_prefix,
+            conf.get('env_prefix'),
+            '',
+        )
+
+        # nested options
+        self.secrets_nested_delimiter: str | None = first_not_none(
+            secrets_nested_delimiter,
+            conf.get('secrets_nested_delimiter'),
+            conf.get('env_nested_delimiter'),
+        )
+        self.secrets_nested_subdir: bool = first_not_none(
+            secrets_nested_subdir,
+            conf.get('secrets_nested_subdir'),
+            False,
+        )
+        if self.secrets_nested_subdir:
+            if secrets_nested_delimiter or conf.get('secrets_nested_delimiter'):
+                raise SettingsError('Options secrets_nested_delimiter and secrets_nested_subdir are mutually exclusive')
+            else:
+                self.secrets_nested_delimiter = os.sep
+
+        # ensure valid secrets_path
+        if self.secrets_dir is None:
+            paths = []
+        elif isinstance(self.secrets_dir, (Path, str)):
+            paths = [self.secrets_dir]
+        else:
+            paths = list(self.secrets_dir)
+        self.secrets_paths: list[Path] = [Path(p).expanduser().resolve() for p in paths]
+        for path in self.secrets_paths:
+            self.validate_secrets_path(path)
+
+        # construct parent
+        super().__init__(
+            settings_cls,
+            case_sensitive=self.case_sensitive,
+            env_prefix=self.secrets_prefix,
+            env_nested_delimiter=self.secrets_nested_delimiter,
+            env_ignore_empty=False,  # match SecretsSettingsSource behaviour
+            env_parse_enums=True,  # we can pass everything here, it will still behave as "True"
+            env_parse_none_str=None,  # match SecretsSettingsSource behaviour
+        )
+        self.env_parse_none_str = None  # update manually because of None
+
+        # update parent members
+        if not len(self.secrets_paths):
+            self.env_vars = {}
+        else:
+            secrets = reduce(
+                lambda d1, d2: dict((*d1.items(), *d2.items())),
+                (self.load_secrets(p) for p in self.secrets_paths),
+            )
+            self.env_vars = parse_env_vars(
+                secrets,
+                self.case_sensitive,
+                self.env_ignore_empty,
+                self.env_parse_none_str,
+            )
+
+    def validate_secrets_path(self, path: Path) -> None:
+        if not path.exists():
+            if self.secrets_dir_missing == 'ok':
+                pass
+            elif self.secrets_dir_missing == 'warn':
+                warnings.warn(f'directory "{path}" does not exist', stacklevel=2)
+            elif self.secrets_dir_missing == 'error':
+                raise SettingsError(f'directory "{path}" does not exist')
+            else:
+                raise ValueError  # unreachable, checked before
+        else:
+            if not path.is_dir():
+                raise SettingsError(f'secrets_dir must reference a directory, not a {path_type_label(path)}')
+            secrets_dir_size = sum(f.stat().st_size for f in self._iter_secret_files(path))
+            if secrets_dir_size > self.secrets_dir_max_size:
+                raise SettingsError(f'secrets_dir size is above {self.secrets_dir_max_size} bytes')
+
+    @staticmethod
+    def _iter_secret_files(path: Path) -> Iterator[Path]:
+        """Yield the secret files contained in ``path``.
+
+        ``path`` is expected to already be resolved. The directory tree is walked
+        explicitly so that symbolic links are handled safely:
+
+        * a file is only yielded if its real location stays within ``path``; entries
+          that resolve outside of it (e.g. through a symbolic link) are skipped, so
+          they neither contribute to the ``secrets_dir_max_size`` accounting nor get
+          loaded;
+        * each real directory is visited at most once, so cyclic or repeated
+          symlinks cannot make the walk loop and inflate the size accounting or the
+          number of loaded secrets.
+
+        Because the size check and the loader share this iterator, they always see
+        the same set of files.
+        """
+        seen_dirs: set[Path] = set()
+
+        def walk(directory: Path) -> Iterator[Path]:
+            # Guard against symlink loops / a directory reachable through multiple
+            # links being traversed more than once.
+            resolved_dir = directory.resolve()
+            if resolved_dir in seen_dirs:
+                return
+            seen_dirs.add(resolved_dir)
+            try:
+                entries = sorted(directory.iterdir())
+            except OSError:
+                return
+            for entry in entries:
+                resolved = entry.resolve()
+                if resolved.is_dir():
+                    # Only descend into directories that stay within secrets_dir.
+                    # A symlinked directory pointing outside of ``path`` is not
+                    # followed at all, so we never walk (potentially large) external
+                    # trees and never read files from outside secrets_dir.
+                    if resolved == path or path in resolved.parents:
+                        yield from walk(entry)
+                elif resolved.is_file() and path in resolved.parents:
+                    # Defense in depth: a file whose real location escapes
+                    # secrets_dir (e.g. a symlink pointing outside of ``path``) is
+                    # skipped from both the size accounting and the load.
+                    yield entry
+
+        yield from walk(path)
+
+    @classmethod
+    def load_secrets(cls, path: Path) -> dict[str, str]:
+        return {str(p.relative_to(path)): p.read_text().strip() for p in cls._iter_secret_files(path)}
+
+    def __repr__(self) -> str:
+        return f'NestedSecretsSettingsSource(secrets_dir={self.secrets_dir!r})'
+
+
+def first_not_none(*objs: Any) -> Any:
+    return next(filter(lambda o: o is not None, objs), None)

venv/Lib/site-packages/pydantic_settings/sources/providers/pyproject.py

@@ -0,0 +1,62 @@
+"""Pyproject TOML file settings source."""
+
+from __future__ import annotations as _annotations
+
+from pathlib import Path
+from typing import (
+    TYPE_CHECKING,
+)
+
+from .toml import TomlConfigSettingsSource
+
+if TYPE_CHECKING:
+    from pydantic_settings.main import BaseSettings
+
+
+class PyprojectTomlConfigSettingsSource(TomlConfigSettingsSource):
+    """
+    A source class that loads variables from a `pyproject.toml` file.
+    """
+
+    def __init__(
+        self,
+        settings_cls: type[BaseSettings],
+        toml_file: Path | None = None,
+    ) -> None:
+        self.toml_file_path = self._pick_pyproject_toml_file(
+            toml_file, settings_cls.model_config.get('pyproject_toml_depth', 0)
+        )
+        self.toml_table_header: tuple[str, ...] = settings_cls.model_config.get(
+            'pyproject_toml_table_header', ('tool', 'pydantic-settings')
+        )
+        self.toml_data = self._read_files(self.toml_file_path)
+        for key in self.toml_table_header:
+            self.toml_data = self.toml_data.get(key, {})
+        super(TomlConfigSettingsSource, self).__init__(settings_cls, self.toml_data)
+
+    @staticmethod
+    def _pick_pyproject_toml_file(provided: Path | None, depth: int) -> Path:
+        """Pick a `pyproject.toml` file path to use.
+
+        Args:
+            provided: Explicit path provided when instantiating this class.
+            depth: Number of directories up the tree to check of a pyproject.toml.
+
+        """
+        if provided:
+            return provided.resolve()
+        rv = Path.cwd() / 'pyproject.toml'
+        count = 0
+        if not rv.is_file():
+            child = rv.parent.parent / 'pyproject.toml'
+            while count < depth:
+                if child.is_file():
+                    return child
+                if str(child.parent) == rv.root:
+                    break  # end discovery after checking system root once
+                child = child.parent.parent / 'pyproject.toml'
+                count += 1
+        return rv
+
+
+__all__ = ['PyprojectTomlConfigSettingsSource']