pkgcore.config.basics module

configuration subsystem primitives

all callables can/may throw a pkgcore.config.errors.ConfigurationError

class pkgcore.config.basics.ConfigSection

Bases: object

Single Config section, returning typed values from a key.

Not much of an object this, if we were using zope.interface it’d be an Interface.

keys() → list[str]

Return a list of keys.

render_value(central, name: str, arg_type)

Return a setting, converted to the requested type.

class pkgcore.config.basics.ConfigType(func_obj: Callable)

Bases: object

A configurable type.

Variables:

• name – string specifying the protocol the instantiated object conforms to.

• callable – callable used to instantiate this type.

• types – dict mapping key names to type strings.

• positional – container holding positional arguments.

• required – container holding required arguments.

• allow_unknowns – controls whether unknown settings should error.

allow_unknowns: bool

callable: Callable

positional: tuple[str]

required: tuple[str]

types: dict[str, str]

class pkgcore.config.basics.DictConfigSection(conversion_func: Callable, source_dict: dict[str, Any])

Bases: ConfigSection

Turns a dict and a conversion function into a ConfigSection.

dict: dict[str, Any]

func: Callable

keys() → list[str]

Return a list of keys.

render_value(central, name: str, arg_type: str) → Any | tuple[str, Any]

Return a setting, converted to the requested type.

class pkgcore.config.basics.LazyNamedSectionRef(central, typename: str, name: str)

Bases: LazySectionRef

name: str

class pkgcore.config.basics.LazySectionRef(central, typename: str)

Bases: object

Abstract base class for lazy-loaded section references.

collapse()

Returns:

pkgcore.config.central.CollapsedConfig.

instantiate() → Any

Convenience method returning the instantiated section.

typename: str

pkgcore.config.basics.convert_asis(central, value, arg_type: str)

“Conversion” func assuming the types are already correct.

pkgcore.config.basics.convert_hybrid(central, value, arg_type: str)

Automagically switch between convert_string and convert_asis.

convert_asis is used for arg_type str and if value is not a string. convert_string is used for the rest.

Be careful about handing in escaped strings: they are not unescaped (for arg_type str).

pkgcore.config.basics.convert_string(central, value, arg_type: str)

Conversion func for a string-based DictConfigSection.

pkgcore.config.basics.parse_config_file(path: str, parser)

pkgcore.config.basics.section_alias(target, typename: str) -> functools.partial(<class 'pkgcore.config.basics.DictConfigSection'>, <function convert_hybrid at 0x7f857d563ec0>)

Build a ConfigSection that instantiates a named reference.

Because of central’s caching our instantiated value will be identical to our target’s.

pkgcore.config.basics.str_to_bool(string: str) → bool

Convert a string to a boolean.

pkgcore.config.basics.str_to_int(string: str) → int

Convert a string to a integer.

pkgcore.config.basics.str_to_list(string: str) → list[str]

Split on whitespace honoring quoting for new tokens.

pkgcore.config.basics.str_to_str(string: str) → str

Yank leading/trailing whitespace and quotation, along with newlines.