/
config_options.py
1045 lines (834 loc) · 36.1 KB
/
config_options.py
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from __future__ import annotations
import functools
import ipaddress
import os
import string
import sys
import traceback
import types
import typing as t
import warnings
from collections import UserString
from typing import (
Any,
Collection,
Dict,
Generic,
Iterator,
List,
Mapping,
NamedTuple,
Tuple,
TypeVar,
Union,
overload,
)
from urllib.parse import quote as urlquote
from urllib.parse import urlsplit, urlunsplit
import markdown
from mkdocs import plugins, theme, utils
from mkdocs.config.base import (
BaseConfigOption,
Config,
LegacyConfig,
PlainConfigSchemaItem,
ValidationError,
)
from mkdocs.exceptions import ConfigurationError
T = TypeVar('T')
SomeConfig = TypeVar('SomeConfig', bound=Config)
class SubConfig(Generic[SomeConfig], BaseConfigOption[SomeConfig]):
"""
Subconfig Config Option
New: If targeting MkDocs 1.4+, please pass a subclass of Config to the
constructor, instead of the old style of a sequence of ConfigOption instances.
Validation is then enabled by default.
A set of `config_options` grouped under a single config option.
By default, validation errors and warnings resulting from validating
`config_options` are ignored (`validate=False`). Users should typically
enable validation with `validate=True`.
"""
@overload
def __init__(
self: SubConfig[SomeConfig], config_class: t.Type[SomeConfig], *, validate: bool = True
):
"""Create a sub-config in a type-safe way, using fields defined in a Config subclass."""
@overload
def __init__(
self: SubConfig[LegacyConfig],
*config_options: PlainConfigSchemaItem,
validate: bool = False,
):
"""Create an untyped sub-config, using directly passed fields."""
def __init__(self, *config_options, validate=None):
super().__init__()
self.default = {}
if (
len(config_options) == 1
and isinstance(config_options[0], type)
and issubclass(config_options[0], Config)
):
if validate is None:
validate = True
(self._make_config,) = config_options
else:
self._make_config = functools.partial(LegacyConfig, config_options)
self._do_validation = bool(validate)
def run_validation(self, value: object) -> SomeConfig:
config = self._make_config()
try:
config.load_dict(value)
failed, warnings = config.validate()
except ConfigurationError as e:
raise ValidationError(str(e))
if self._do_validation:
# Capture errors and warnings
self.warnings = [f'Sub-option {key!r}: {msg}' for key, msg in warnings]
if failed:
# Get the first failing one
key, err = failed[0]
raise ValidationError(f"Sub-option {key!r} configuration error: {err}")
return config
class OptionallyRequired(Generic[T], BaseConfigOption[T]):
"""
Soft-deprecated, do not use.
A subclass of BaseConfigOption that adds support for default values and
required values. It is a base class for config options.
"""
@overload
def __init__(self, default=None):
...
@overload
def __init__(self, default=None, *, required: bool):
...
def __init__(self, default=None, required=None):
super().__init__()
self.default = default
self._legacy_required = required
self.required = bool(required)
def validate(self, value):
"""
Perform some initial validation.
If the option is empty (None) and isn't required, leave it as such. If
it is empty but has a default, use that. Finally, call the
run_validation method on the subclass unless.
"""
if value is None:
if self.default is not None:
value = self.default
elif not self.required:
return None
elif self.required:
raise ValidationError("Required configuration not provided.")
return self.run_validation(value)
class ListOfItems(Generic[T], BaseConfigOption[List[T]]):
"""
Validates a homogeneous list of items.
E.g. for `config_options.ListOfItems(config_options.Type(int))` a valid item is `[1, 2, 3]`.
"""
required: Union[bool, None] = None # Only for subclasses to set.
def __init__(self, option_type: BaseConfigOption[T], default=None) -> None:
super().__init__()
self.default = default
self.option_type = option_type
self.option_type.warnings = self.warnings
def __repr__(self) -> str:
return f'{type(self).__name__}: {self.option_type}'
def pre_validation(self, config: Config, key_name: str):
self._config = config
self._key_name = key_name
def run_validation(self, value: object) -> List[T]:
if value is None:
if self.required or self.default is None:
raise ValidationError("Required configuration not provided.")
value = self.default
if not isinstance(value, list):
raise ValidationError(f'Expected a list of items, but a {type(value)} was given.')
if not value: # Optimization for empty list
return value
fake_config = LegacyConfig(())
try:
fake_config.config_file_path = self._config.config_file_path
except AttributeError:
pass
# Emulate a config-like environment for pre_validation and post_validation.
parent_key_name = getattr(self, '_key_name', '')
fake_keys = [f'{parent_key_name}[{i}]' for i in range(len(value))]
fake_config.data = dict(zip(fake_keys, value))
for key_name in fake_config:
self.option_type.pre_validation(fake_config, key_name)
for key_name in fake_config:
# Specifically not running `validate` to avoid the OptionallyRequired effect.
fake_config[key_name] = self.option_type.run_validation(fake_config[key_name])
for key_name in fake_config:
self.option_type.post_validation(fake_config, key_name)
return [fake_config[k] for k in fake_keys]
class ConfigItems(ListOfItems[LegacyConfig]):
"""
Deprecated: Use `ListOfItems(SubConfig(...))` instead of `ConfigItems(...)`.
Validates a list of mappings that all must match the same set of
options.
"""
@overload
def __init__(self, *config_options: PlainConfigSchemaItem):
...
@overload
def __init__(self, *config_options: PlainConfigSchemaItem, required: bool):
...
def __init__(self, *config_options: PlainConfigSchemaItem, required=None) -> None:
super().__init__(SubConfig(*config_options), default=[])
self._legacy_required = required
self.required = bool(required)
class Type(Generic[T], OptionallyRequired[T]):
"""
Type Config Option
Validate the type of a config option against a given Python type.
"""
@overload
def __init__(self, type_: t.Type[T], length: t.Optional[int] = None, **kwargs):
...
@overload
def __init__(self, type_: Tuple[t.Type[T], ...], length: t.Optional[int] = None, **kwargs):
...
def __init__(self, type_, length=None, **kwargs) -> None:
super().__init__(**kwargs)
self._type = type_
self.length = length
def run_validation(self, value: object) -> T:
if not isinstance(value, self._type):
msg = f"Expected type: {self._type} but received: {type(value)}"
elif self.length is not None and len(value) != self.length:
msg = (
f"Expected type: {self._type} with length {self.length}"
f" but received: {value!r} with length {len(value)}"
)
else:
return value
raise ValidationError(msg)
class Choice(Generic[T], OptionallyRequired[T]):
"""
Choice Config Option
Validate the config option against a strict set of values.
"""
def __init__(self, choices: Collection[T], default: t.Optional[T] = None, **kwargs) -> None:
super().__init__(default=default, **kwargs)
try:
length = len(choices)
except TypeError:
length = 0
if not length or isinstance(choices, str):
raise ValueError(f'Expected iterable of choices, got {choices}')
if default is not None and default not in choices:
raise ValueError(f'{default!r} is not one of {choices!r}')
self.choices = choices
def run_validation(self, value: object) -> T:
if value not in self.choices:
raise ValidationError(f"Expected one of: {self.choices} but received: {value!r}")
return value # type: ignore
class Deprecated(BaseConfigOption):
"""
Deprecated Config Option
Raises a warning as the option is deprecated. Uses `message` for the
warning. If `move_to` is set to the name of a new config option, the value
is moved to the new option on pre_validation. If `option_type` is set to a
ConfigOption instance, then the value is validated against that type.
"""
def __init__(
self,
moved_to: t.Optional[str] = None,
message: t.Optional[str] = None,
removed: bool = False,
option_type: t.Optional[BaseConfigOption] = None,
) -> None:
super().__init__()
self.default = None
self.moved_to = moved_to
if not message:
if removed:
message = "The configuration option '{}' was removed from MkDocs."
else:
message = (
"The configuration option '{}' has been deprecated and "
"will be removed in a future release of MkDocs."
)
if moved_to:
message += f" Use '{moved_to}' instead."
self.message = message
self.removed = removed
self.option = option_type or BaseConfigOption()
self.warnings = self.option.warnings
def pre_validation(self, config: Config, key_name: str):
self.option.pre_validation(config, key_name)
if config.get(key_name) is not None:
if self.removed:
raise ValidationError(self.message.format(key_name))
self.warnings.append(self.message.format(key_name))
if self.moved_to is not None:
*parent_keys, target_key = self.moved_to.split('.')
target: Any = config
for key in parent_keys:
if target.get(key) is None:
target[key] = {}
target = target[key]
if not isinstance(target, dict):
# We can't move it for the user
return
target[target_key] = config.pop(key_name)
def validate(self, value):
return self.option.validate(value)
def post_validation(self, config: Config, key_name: str):
self.option.post_validation(config, key_name)
def reset_warnings(self):
self.option.reset_warnings()
self.warnings = self.option.warnings
class _IpAddressValue(NamedTuple):
host: str
port: int
def __str__(self) -> str:
return f'{self.host}:{self.port}'
class IpAddress(OptionallyRequired[_IpAddressValue]):
"""
IpAddress Config Option
Validate that an IP address is in an appropriate format
"""
def run_validation(self, value: object) -> _IpAddressValue:
if not isinstance(value, str) or ':' not in value:
raise ValidationError("Must be a string of format 'IP:PORT'")
host, port_str = value.rsplit(':', 1)
if host != 'localhost':
if host.startswith('[') and host.endswith(']'):
host = host[1:-1]
try:
# Validate and normalize IP Address
host = str(ipaddress.ip_address(host))
except ValueError as e:
raise ValidationError(e)
try:
port = int(port_str)
except Exception:
raise ValidationError(f"'{port_str}' is not a valid port")
return _IpAddressValue(host, port)
def post_validation(self, config: Config, key_name: str):
host = config[key_name].host
if key_name == 'dev_addr' and host in ['0.0.0.0', '::']:
self.warnings.append(
f"The use of the IP address '{host}' suggests a production environment "
"or the use of a proxy to connect to the MkDocs server. However, "
"the MkDocs' server is intended for local development purposes only. "
"Please use a third party production-ready server instead."
)
class URL(OptionallyRequired[str]):
"""
URL Config Option
Validate a URL by requiring a scheme is present.
"""
@overload
def __init__(self, default=None, *, is_dir: bool = False):
...
@overload
def __init__(self, default=None, *, required: bool, is_dir: bool = False):
...
def __init__(self, default=None, required=None, is_dir: bool = False) -> None:
self.is_dir = is_dir
super().__init__(default, required=required)
def run_validation(self, value: object) -> str:
if not isinstance(value, str):
raise ValidationError(f"Expected a string, got {type(value)}")
if value == '':
return value
try:
parsed_url = urlsplit(value)
except (AttributeError, TypeError):
raise ValidationError("Unable to parse the URL.")
if parsed_url.scheme and parsed_url.netloc:
if self.is_dir and not parsed_url.path.endswith('/'):
parsed_url = parsed_url._replace(path=f'{parsed_url.path}/')
return urlunsplit(parsed_url)
raise ValidationError("The URL isn't valid, it should include the http:// (scheme)")
class Optional(Generic[T], BaseConfigOption[Union[T, None]]):
"""Wraps a field and makes a None value possible for it when no value is set.
E.g. `my_field = config_options.Optional(config_options.Type(str))`
"""
def __init__(self, config_option: BaseConfigOption[T]) -> None:
if config_option.default is not None:
raise ValueError(
f"This option already has a default ({config_option.default!r}) "
f"and doesn't need to be wrapped into Optional"
)
super().__init__()
self.option = config_option
self.warnings = config_option.warnings
def __getattr__(self, key):
if key in ('option', 'warnings'):
raise AttributeError
return getattr(self.option, key)
def pre_validation(self, config: Config, key_name: str):
return self.option.pre_validation(config, key_name)
def run_validation(self, value: object) -> Union[T, None]:
if value is None:
return None
return self.option.validate(value)
def post_validation(self, config: Config, key_name: str):
result = self.option.post_validation(config, key_name) # type: ignore
self.warnings = self.option.warnings
return result
def reset_warnings(self):
self.option.reset_warnings()
self.warnings = self.option.warnings
class RepoURL(URL):
def __init__(self, *args, **kwargs):
warnings.warn(
"RepoURL is no longer used in MkDocs and will be removed.", DeprecationWarning
)
super().__init__(*args, **kwargs)
def post_validation(self, config: Config, key_name: str):
repo_host = urlsplit(config['repo_url']).netloc.lower()
edit_uri = config.get('edit_uri')
# derive repo_name from repo_url if unset
if config['repo_url'] is not None and config.get('repo_name') is None:
if repo_host == 'github.com':
config['repo_name'] = 'GitHub'
elif repo_host == 'bitbucket.org':
config['repo_name'] = 'Bitbucket'
elif repo_host == 'gitlab.com':
config['repo_name'] = 'GitLab'
else:
config['repo_name'] = repo_host.split('.')[0].title()
# derive edit_uri from repo_name if unset
if config['repo_url'] is not None and edit_uri is None:
if repo_host == 'github.com' or repo_host == 'gitlab.com':
edit_uri = 'edit/master/docs/'
elif repo_host == 'bitbucket.org':
edit_uri = 'src/default/docs/'
else:
edit_uri = ''
# ensure a well-formed edit_uri
if edit_uri and not edit_uri.endswith('/'):
edit_uri += '/'
config['edit_uri'] = edit_uri
class EditURI(Type[str]):
def __init__(self, repo_url_key: str) -> None:
super().__init__(str)
self.repo_url_key = repo_url_key
def post_validation(self, config: Config, key_name: str):
edit_uri = config.get(key_name)
repo_url = config.get(self.repo_url_key)
if edit_uri is None and repo_url is not None:
repo_host = urlsplit(repo_url).netloc.lower()
if repo_host == 'github.com' or repo_host == 'gitlab.com':
edit_uri = 'edit/master/docs/'
elif repo_host == 'bitbucket.org':
edit_uri = 'src/default/docs/'
# ensure a well-formed edit_uri
if edit_uri and not edit_uri.endswith('/'):
edit_uri += '/'
config[key_name] = edit_uri
class EditURITemplate(BaseConfigOption[str]):
class Formatter(string.Formatter):
def convert_field(self, value, conversion):
if conversion == 'q':
return urlquote(value, safe='')
return super().convert_field(value, conversion)
class Template(UserString):
def __init__(self, formatter, data) -> None:
super().__init__(data)
self.formatter = formatter
try:
self.format('', '')
except KeyError as e:
raise ValueError(f"Unknown template substitute: {e}")
def format(self, path, path_noext):
return self.formatter.format(self.data, path=path, path_noext=path_noext)
def __init__(self, edit_uri_key: t.Optional[str] = None) -> None:
super().__init__()
self.edit_uri_key = edit_uri_key
def run_validation(self, value: object):
try:
return self.Template(self.Formatter(), value)
except Exception as e:
raise ValidationError(e)
def post_validation(self, config: Config, key_name: str):
if self.edit_uri_key and config.get(key_name) and config.get(self.edit_uri_key):
self.warnings.append(
f"The option '{self.edit_uri_key}' has no effect when '{key_name}' is set."
)
class RepoName(Type[str]):
def __init__(self, repo_url_key: str) -> None:
super().__init__(str)
self.repo_url_key = repo_url_key
def post_validation(self, config: Config, key_name: str):
repo_name = config.get(key_name)
repo_url = config.get(self.repo_url_key)
# derive repo_name from repo_url if unset
if repo_url is not None and repo_name is None:
repo_host = urlsplit(config['repo_url']).netloc.lower()
if repo_host == 'github.com':
repo_name = 'GitHub'
elif repo_host == 'bitbucket.org':
repo_name = 'Bitbucket'
elif repo_host == 'gitlab.com':
repo_name = 'GitLab'
else:
repo_name = repo_host.split('.')[0].title()
config[key_name] = repo_name
class FilesystemObject(Type[str]):
"""
Base class for options that point to filesystem objects.
"""
existence_test = staticmethod(os.path.exists)
name = 'file or directory'
def __init__(self, exists: bool = False, **kwargs) -> None:
super().__init__(type_=str, **kwargs)
self.exists = exists
self.config_dir: t.Optional[str] = None
def pre_validation(self, config: Config, key_name: str):
self.config_dir = (
os.path.dirname(config.config_file_path) if config.config_file_path else None
)
def run_validation(self, value: object) -> str:
value = super().run_validation(value)
if self.config_dir and not os.path.isabs(value):
value = os.path.join(self.config_dir, value)
if self.exists and not self.existence_test(value):
raise ValidationError(f"The path '{value}' isn't an existing {self.name}.")
return os.path.abspath(value)
class Dir(FilesystemObject):
"""
Dir Config Option
Validate a path to a directory, optionally verifying that it exists.
"""
existence_test = staticmethod(os.path.isdir)
name = 'directory'
class DocsDir(Dir):
def post_validation(self, config: Config, key_name: str):
if config.config_file_path is None:
return
# Validate that the dir is not the parent dir of the config file.
if os.path.dirname(config.config_file_path) == config[key_name]:
raise ValidationError(
f"The '{key_name}' should not be the parent directory of the"
f" config file. Use a child directory instead so that the"
f" '{key_name}' is a sibling of the config file."
)
class File(FilesystemObject):
"""
File Config Option
Validate a path to a file, optionally verifying that it exists.
"""
existence_test = staticmethod(os.path.isfile)
name = 'file'
class ListOfPaths(ListOfItems[str]):
"""
List of Paths Config Option
A list of file system paths. Raises an error if one of the paths does not exist.
For greater flexibility, prefer ListOfItems, e.g. to require files specifically:
config_options.ListOfItems(config_options.File(exists=True))
"""
@overload
def __init__(self, default=[]):
...
@overload
def __init__(self, default=[], *, required: bool):
...
def __init__(self, default=[], required=None) -> None:
super().__init__(FilesystemObject(exists=True), default)
self.required = required
class SiteDir(Dir):
"""
SiteDir Config Option
Validates the site_dir and docs_dir directories do not contain each other.
"""
def post_validation(self, config: Config, key_name: str):
super().post_validation(config, key_name)
docs_dir = config['docs_dir']
site_dir = config['site_dir']
# Validate that the docs_dir and site_dir don't contain the
# other as this will lead to copying back and forth on each
# and eventually make a deep nested mess.
if (docs_dir + os.sep).startswith(site_dir.rstrip(os.sep) + os.sep):
raise ValidationError(
f"The 'docs_dir' should not be within the 'site_dir' as this "
f"can mean the source files are overwritten by the output or "
f"it will be deleted if --clean is passed to mkdocs build. "
f"(site_dir: '{site_dir}', docs_dir: '{docs_dir}')"
)
elif (site_dir + os.sep).startswith(docs_dir.rstrip(os.sep) + os.sep):
raise ValidationError(
f"The 'site_dir' should not be within the 'docs_dir' as this "
f"leads to the build directory being copied into itself and "
f"duplicate nested files in the 'site_dir'. "
f"(site_dir: '{site_dir}', docs_dir: '{docs_dir}')"
)
class Theme(BaseConfigOption[theme.Theme]):
"""
Theme Config Option
Validate that the theme exists and build Theme instance.
"""
def __init__(self, default=None) -> None:
super().__init__()
self.default = default
def pre_validation(self, config: Config, key_name: str):
self.config_file_path = config.config_file_path
def run_validation(self, value: object) -> theme.Theme:
if value is None and self.default is not None:
theme_config = {'name': self.default}
elif isinstance(value, str):
theme_config = {'name': value}
elif isinstance(value, dict):
if 'name' not in value:
raise ValidationError("No theme name set.")
theme_config = value
else:
raise ValidationError(
f'Invalid type {type(value)}. Expected a string or key/value pairs.'
)
themes = utils.get_theme_names()
if theme_config['name'] is not None and theme_config['name'] not in themes:
raise ValidationError(
f"Unrecognised theme name: '{theme_config['name']}'. "
f"The available installed themes are: {', '.join(themes)}"
)
if not theme_config['name'] and 'custom_dir' not in theme_config:
raise ValidationError("At least one of 'name' or 'custom_dir' must be defined.")
# Ensure custom_dir is an absolute path
if 'custom_dir' in theme_config and not os.path.isabs(theme_config['custom_dir']):
assert self.config_file_path is not None
config_dir = os.path.dirname(self.config_file_path)
theme_config['custom_dir'] = os.path.join(config_dir, theme_config['custom_dir'])
if 'custom_dir' in theme_config and not os.path.isdir(theme_config['custom_dir']):
raise ValidationError(
"The path set in custom_dir ('{path}') does not exist.".format(
path=theme_config['custom_dir']
)
)
if 'locale' in theme_config and not isinstance(theme_config['locale'], str):
raise ValidationError("'locale' must be a string.")
return theme.Theme(**theme_config)
class Nav(OptionallyRequired):
"""
Nav Config Option
Validate the Nav config.
"""
def run_validation(self, value: object, *, top=True):
if isinstance(value, list):
for subitem in value:
self._validate_nav_item(subitem)
if top and not value:
value = None
elif isinstance(value, dict) and value and not top:
# TODO: this should be an error.
self.warnings.append(f"Expected nav to be a list, got {self._repr_item(value)}")
for subitem in value.values():
self.run_validation(subitem, top=False)
elif isinstance(value, str) and not top:
pass
else:
raise ValidationError(f"Expected nav to be a list, got {self._repr_item(value)}")
return value
def _validate_nav_item(self, value):
if isinstance(value, str):
pass
elif isinstance(value, dict):
if len(value) != 1:
raise ValidationError(
f"Expected nav item to be a dict of size 1, got {self._repr_item(value)}"
)
for subnav in value.values():
self.run_validation(subnav, top=False)
else:
raise ValidationError(
f"Expected nav item to be a string or dict, got {self._repr_item(value)}"
)
@classmethod
def _repr_item(cls, value) -> str:
if isinstance(value, dict) and value:
return f"dict with keys {tuple(value.keys())}"
elif isinstance(value, (str, type(None))):
return repr(value)
else:
return f"a {type(value).__name__}: {value!r}"
class Private(BaseConfigOption):
"""
Private Config Option
A config option only for internal use. Raises an error if set by the user.
"""
def run_validation(self, value: object):
if value is not None:
raise ValidationError('For internal use only.')
class MarkdownExtensions(OptionallyRequired[List[str]]):
"""
Markdown Extensions Config Option
A list or dict of extensions. Each list item may contain either a string or a one item dict.
A string must be a valid Markdown extension name with no config options defined. The key of
a dict item must be a valid Markdown extension name and the value must be a dict of config
options for that extension. Extension configs are set on the private setting passed to
`configkey`. The `builtins` keyword accepts a list of extensions which cannot be overridden by
the user. However, builtins can be duplicated to define config options for them if desired."""
def __init__(
self,
builtins: t.Optional[List[str]] = None,
configkey: str = 'mdx_configs',
default: List[str] = [],
**kwargs,
) -> None:
super().__init__(default=default, **kwargs)
self.builtins = builtins or []
self.configkey = configkey
def validate_ext_cfg(self, ext, cfg):
if not isinstance(ext, str):
raise ValidationError(f"'{ext}' is not a valid Markdown Extension name.")
if not cfg:
return
if not isinstance(cfg, dict):
raise ValidationError(f"Invalid config options for Markdown Extension '{ext}'.")
self.configdata[ext] = cfg
def run_validation(self, value: object):
self.configdata: Dict[str, dict] = {}
if not isinstance(value, (list, tuple, dict)):
raise ValidationError('Invalid Markdown Extensions configuration')
extensions = []
if isinstance(value, dict):
for ext, cfg in value.items():
self.validate_ext_cfg(ext, cfg)
extensions.append(ext)
else:
for item in value:
if isinstance(item, dict):
if len(item) > 1:
raise ValidationError('Invalid Markdown Extensions configuration')
ext, cfg = item.popitem()
self.validate_ext_cfg(ext, cfg)
extensions.append(ext)
elif isinstance(item, str):
extensions.append(item)
else:
raise ValidationError('Invalid Markdown Extensions configuration')
extensions = utils.reduce_list(self.builtins + extensions)
# Confirm that Markdown considers extensions to be valid
md = markdown.Markdown()
for ext in extensions:
try:
md.registerExtensions((ext,), self.configdata)
except Exception as e:
stack: list = []
for frame in reversed(traceback.extract_tb(sys.exc_info()[2])):
if not frame.line: # Ignore frames before <frozen importlib._bootstrap>
break
stack.insert(0, frame)
tb = ''.join(traceback.format_list(stack))
raise ValidationError(
f"Failed to load extension '{ext}'.\n{tb}{type(e).__name__}: {e}"
)
return extensions
def post_validation(self, config: Config, key_name: str):
config[self.configkey] = self.configdata
class Plugins(OptionallyRequired[plugins.PluginCollection]):
"""
Plugins config option.
A list or dict of plugins. If a plugin defines config options those are used when
initializing the plugin class.
"""
def __init__(self, theme_key: t.Optional[str] = None, **kwargs) -> None:
super().__init__(**kwargs)
self.installed_plugins = plugins.get_plugins()
self.theme_key = theme_key
self._config: t.Optional[Config] = None
self.plugin_cache: Dict[str, plugins.BasePlugin] = {}
def pre_validation(self, config, key_name):
self._config = config
def run_validation(self, value: object) -> plugins.PluginCollection:
if not isinstance(value, (list, tuple, dict)):
raise ValidationError('Invalid Plugins configuration. Expected a list or dict.')
self.plugins = plugins.PluginCollection()
for name, cfg in self._parse_configs(value):
name, plugin = self.load_plugin_with_namespace(name, cfg)
self.plugins[name] = plugin
return self.plugins
@classmethod
def _parse_configs(cls, value: Union[list, tuple, dict]) -> Iterator[Tuple[str, dict]]:
if isinstance(value, dict):
for name, cfg in value.items():
if not isinstance(name, str):
raise ValidationError(f"'{name}' is not a valid plugin name.")
yield name, cfg
else:
for item in value:
if isinstance(item, dict):
if len(item) != 1:
raise ValidationError('Invalid Plugins configuration')
name, cfg = item.popitem()
else:
name = item
cfg = {}
if not isinstance(name, str):
raise ValidationError(f"'{name}' is not a valid plugin name.")
yield name, cfg
def load_plugin_with_namespace(self, name: str, config) -> Tuple[str, plugins.BasePlugin]:
if '/' in name: # It's already specified with a namespace.
# Special case: allow to explicitly skip namespaced loading:
if name.startswith('/'):
name = name[1:]
else:
# Attempt to load with prepended namespace for the current theme.
if self.theme_key and self._config:
current_theme = self._config[self.theme_key].name
if current_theme:
expanded_name = f'{current_theme}/{name}'
if expanded_name in self.installed_plugins:
name = expanded_name
return (name, self.load_plugin(name, config))
def load_plugin(self, name: str, config) -> plugins.BasePlugin:
if name not in self.installed_plugins:
raise ValidationError(f'The "{name}" plugin is not installed')
config = config or {} # Users may define a null (None) config
if not isinstance(config, dict):
raise ValidationError(f"Invalid config options for the '{name}' plugin.")
plugin = self.plugin_cache.get(name)
if plugin is None:
plugin_cls = self.installed_plugins[name].load()
if not issubclass(plugin_cls, plugins.BasePlugin):
raise ValidationError(
f'{plugin_cls.__module__}.{plugin_cls.__name__} must be a subclass of'
f' {plugins.BasePlugin.__module__}.{plugins.BasePlugin.__name__}'
)
plugin = plugin_cls()
if hasattr(plugin, 'on_startup') or hasattr(plugin, 'on_shutdown'):
self.plugin_cache[name] = plugin
errors, warnings = plugin.load_config(
config, self._config.config_file_path if self._config else None