Module refinery.units
This package contains all refinery units. To write an executable refinery unit,
it is sufficient to write a class that inherits from Unit and
implements Unit.process(). If the operation implemented by this
unit should be reversible, then a method called reverse with the same
signature has to be implemented. For example, the following would be a
minimalistic approach to implement hex:
from refinery import Unit
class hex(Unit):
def process(self, data): return bytes.fromhex(data.decode('ascii'))
def reverse(self, data): return data.hex().encode(self.codec)
The above script can be run from the command line. Since hex is not marked as
abstract, its inherited Unit.run() method will be invoked when
the script is executed.
Command Line Parameters
If you want your custom refinery unit to accept command line parameters, you can
write an initialization routine. For example, the following unit implements a
very simple XOR unit (less versatile than the already existing xor):
from refinery import Unit
import itertools
class myxor (Unit):
def __init__(self, key: Unit.Arg.Binary(help='Encryption key')):
pass
def process(self, data: bytearray):
key = itertools.cycle(self.args.key)
for k, b in enumerate(data):
data[k] ^= next(key)
return data
The refinery.Arg decorator is optional and only used here to provide a help
message on the command line. It is also available as the Arg class property
of the refinery.Unit class for convenience. The example also shows that the
__init__ code can be left empty: In this case, refinery automatically adds
boilerplate code that copies all __init__ parameters to the args member
variable of the unit. In this case, the constructor will be completed to have
the following code:
def __init__(self, key: Unit.Arg.Binary(help='Encryption key')):
super().__init__(key=key)
The option of writing an empty __init__ was added because it is rarely needed
to perform any processing of the input arguments. The command line help for this
unit will look as follows:
usage: myxor [-h] [-Q] [-0] [-v] key
positional arguments:
key Encryption key
generic options:
-h, --help Show this help message and exit.
-Q, --quiet Disables all log output.
-0, --devnull Do not produce any output.
-v, --verbose Specify up to two times to increase log level.
Refinery Syntax in Code
Refinery units can be used in Python code (and a Python repl) in nearly the same
way as on the command line. As one example, consider the following unit that can
decode base64 with a custom alphabet using map and b64:
from refinery import Unit, b64, map
class b64custom(Unit):
_b64alphabet = (
B'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
B'abcdefghijklmnopqrstuvwxyz'
B'0123456789+/'
)
def __init__(self, alphabet=_b64alphabet):
if len(alphabet) != 64:
raise ValueError('Alphabet size must be 64')
super().__init__(alphabet=alphabet)
def process(self, data):
return data | map(self.args.alphabet, self._b64alphabet) | b64
def reverse(self, data):
return data | -b64 | map(self._b64alphabet, self.args.alphabet)
The syntax does not work exactly as on the command line, but it was designed to be as similar as possible:
- The binary or operator
|can be used to combine units into pipelines. - Combining a pipeline from the left with a byte string or io stream object will feed this byte string into the unit.
- Unary negation of a reversible unit is equivalent to using the
-Rswitch for reverse mode. - A pipeline is an iterable of output chunks, but there is quite a selection of
objects that can be connected to a pipeline from the right using
|for various different output options. See below for details.
If you want to use frames in code, simply omit any pipe before a square bracked.
For example, the first example from the refinery.lib.frame documentation
translates to the following Python code:
>>> from refinery import *
>>> B'OOOOOOOO' | chop(2) [ ccp(B'F') | cca(B'.') ]| ...
>>> bytearray(b'FOO.FOO.FOO.FOO.')
In the above example, the pipeline is piped to a literal ellipsis (…) to get
the final result. The following section lists the other output options.
Output Options in Code
You can connect a pipeline to any binary i/o stream, and the output of the pipeline will be written to that stream. Example:
with open('output', 'wb') as stream:
B'BINARY REFINERY' | xor(0x13) | stream
Furthermore, you can connect pipelines to any callable, and you can always use
a literal ellipsis (…) to represent the identity function. The result of
this is that you receive the raw output from the pipeline:
>>> B'BINARY REFINERY' | xor(0x13) | ...
bytearray(b'QZ]RAJ3AVUZ]VAJ')
You can also connect to sets and lists containing a single callable. In this case, the callable will be applied to each output chunk and all results will be collected in a list or set, respectively. Examples:
>>> B'ABABCBABABCHB' | rex('.B') | [str]
['AB', 'AB', 'CB', 'AB', 'AB', 'HB']
>>> B'ABABCBABABCHB' | rex('.B') | {str}
{'AB', 'CB', 'HB'}
You can also consume into a dictionary in a similar way:
>>> B'ABABCBABABCHB' | rex('.(?P<k>.)B') | {'k': str}
{A: ['BAB', 'BAB'], H: ['CHB']}
Here, the dictionary is expected to contain exactly one key-value pair. The key
is the name of a meta variable and the value is a conversion function. The
result will be a dictionary where all converted results have been grouped under
the respective value of their meta variable. With all of the above options, it
is always possible to use a literal ellipsis (…).
You can connect pipelines to bytearray and (writable) memoryview instances.
In this case, the output will be appended to the end of this buffer. Finally, if
you connect a pipeline to None, this will execute the unit but discard all
output. This is useful for using units with side effects, like peek,
in a REPL.
Expand source code Browse git
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
This package contains all refinery units. To write an executable refinery unit,
it is sufficient to write a class that inherits from `refinery.units.Unit` and
implements `refinery.units.Unit.process`. If the operation implemented by this
unit should be reversible, then a method called `reverse` with the same
signature has to be implemented. For example, the following would be a
minimalistic approach to implement `refinery.hex`:
from refinery import Unit
class hex(Unit):
def process(self, data): return bytes.fromhex(data.decode('ascii'))
def reverse(self, data): return data.hex().encode(self.codec)
The above script can be run from the command line. Since `hex` is not marked as
abstract, its inherited `refinery.units.Unit.run` method will be invoked when
the script is executed.
### Command Line Parameters
If you want your custom refinery unit to accept command line parameters, you can
write an initialization routine. For example, the following unit implements a
very simple XOR unit (less versatile than the already existing `refinery.xor`):
from refinery import Unit
import itertools
class myxor (Unit):
def __init__(self, key: Unit.Arg.Binary(help='Encryption key')):
pass
def process(self, data: bytearray):
key = itertools.cycle(self.args.key)
for k, b in enumerate(data):
data[k] ^= next(key)
return data
The `refinery.Arg` decorator is optional and only used here to provide a help
message on the command line. It is also available as the `Arg` class property
of the `refinery.Unit` class for convenience. The example also shows that the
`__init__` code can be left empty: In this case, refinery automatically adds
boilerplate code that copies all `__init__` parameters to the `args` member
variable of the unit. In this case, the constructor will be completed to have
the following code:
def __init__(self, key: Unit.Arg.Binary(help='Encryption key')):
super().__init__(key=key)
The option of writing an empty `__init__` was added because it is rarely needed
to perform any processing of the input arguments. The command line help for this
unit will look as follows:
usage: myxor [-h] [-Q] [-0] [-v] key
positional arguments:
key Encryption key
generic options:
-h, --help Show this help message and exit.
-Q, --quiet Disables all log output.
-0, --devnull Do not produce any output.
-v, --verbose Specify up to two times to increase log level.
### Refinery Syntax in Code
Refinery units can be used in Python code (and a Python repl) in nearly the same
way as on the command line. As one example, consider the following unit that can
decode base64 with a custom alphabet using `refinery.map` and `refinery.b64`:
from refinery import Unit, b64, map
class b64custom(Unit):
_b64alphabet = (
B'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
B'abcdefghijklmnopqrstuvwxyz'
B'0123456789+/'
)
def __init__(self, alphabet=_b64alphabet):
if len(alphabet) != 64:
raise ValueError('Alphabet size must be 64')
super().__init__(alphabet=alphabet)
def process(self, data):
return data | map(self.args.alphabet, self._b64alphabet) | b64
def reverse(self, data):
return data | -b64 | map(self._b64alphabet, self.args.alphabet)
The syntax does not work exactly as on the command line, but it was designed to
be as similar as possible:
- The binary or operator `|` can be used to combine units into pipelines.
- Combining a pipeline from the left with a byte string or io stream object will
feed this byte string into the unit.
- Unary negation of a reversible unit is equivalent to using the `-R` switch for
reverse mode.
- A pipeline is an iterable of output chunks, but there is quite a selection of
objects that can be connected to a pipeline from the right using `|` for
various different output options. See below for details.
If you want to use frames in code, simply omit any pipe before a square bracked.
For example, the first example from the `refinery.lib.frame` documentation
translates to the following Python code:
>>> from refinery import *
>>> B'OOOOOOOO' | chop(2) [ ccp(B'F') | cca(B'.') ]| ...
>>> bytearray(b'FOO.FOO.FOO.FOO.')
In the above example, the pipeline is piped to a literal ellipsis (`...`) to get
the final result. The following section lists the other output options.
### Output Options in Code
You can connect a pipeline to any binary i/o stream, and the output of the
pipeline will be written to that stream. Example:
with open('output', 'wb') as stream:
B'BINARY REFINERY' | xor(0x13) | stream
Furthermore, you can connect pipelines to any callable, and you can always use
a literal ellipsis (`...`) to represent the identity function. The result of
this is that you receive the raw output from the pipeline:
>>> B'BINARY REFINERY' | xor(0x13) | ...
bytearray(b'QZ]RAJ3AVUZ]VAJ')
You can also connect to sets and lists containing a single callable. In this
case, the callable will be applied to each output chunk and all results will be
collected in a list or set, respectively. Examples:
>>> B'ABABCBABABCHB' | rex('.B') | [str]
['AB', 'AB', 'CB', 'AB', 'AB', 'HB']
>>> B'ABABCBABABCHB' | rex('.B') | {str}
{'AB', 'CB', 'HB'}
You can also consume into a dictionary in a similar way:
>>> B'ABABCBABABCHB' | rex('.(?P<k>.)B') | {'k': str}
{A: ['BAB', 'BAB'], H: ['CHB']}
Here, the dictionary is expected to contain exactly one key-value pair. The key
is the name of a meta variable and the value is a conversion function. The
result will be a dictionary where all converted results have been grouped under
the respective value of their meta variable. With all of the above options, it
is always possible to use a literal ellipsis (`...`).
You can connect pipelines to `bytearray` and (writable) `memoryview` instances.
In this case, the output will be appended to the end of this buffer. Finally, if
you connect a pipeline to `None`, this will execute the unit but discard all
output. This is useful for using units with side effects, like `refinery.peek`,
in a REPL.
"""
from __future__ import annotations
import abc
import copy
import inspect
import os
import sys
from abc import ABCMeta
from enum import Enum
from functools import wraps
from collections import OrderedDict
from threading import Lock
from typing import (
Dict,
Iterable,
Sequence,
Set,
Type,
TypeVar,
Union,
List,
Optional,
Callable,
ClassVar,
Tuple,
Any,
ByteString,
Generator,
overload,
no_type_check,
get_type_hints
)
from argparse import (
ArgumentTypeError, Namespace,
ONE_OR_MORE,
OPTIONAL,
REMAINDER,
ZERO_OR_MORE
)
from refinery.lib.argparser import ArgumentParserWithKeywordHooks, ArgparseError
from refinery.lib.frame import Framed, Chunk
from refinery.lib.structures import MemoryFile
from refinery.lib.environment import LogLevel, Logger, environment, logger
from refinery.lib.types import ByteStr, Singleton
from refinery.lib.argformats import (
manifest,
multibin,
number,
numseq,
ParserVariableMissing,
pending,
regexp,
sliceobj,
VariableMissing,
)
from refinery.lib.tools import (
autoinvoke,
documentation,
isbuffer,
isstream,
lookahead,
normalize_to_display,
normalize_to_identifier,
one,
skipfirst,
)
ByteIO = MemoryFile[ByteStr]
class RefineryPartialResult(ValueError):
"""
This exception indicates that a partial result is available.
"""
def __init__(self, message: str, partial: ByteString, rest: Optional[ByteString] = None):
super().__init__(message)
self.message = message
self.partial = partial
self.rest = rest
def __str__(self):
return self.message
class RefineryImportMissing(ModuleNotFoundError):
def __init__(self, missing: str, *dependencies: str):
super().__init__()
import shlex
self.missing = missing
self.install = ' '.join(shlex.quote(dist) for dist in dependencies)
self.dependencies = dependencies
class RefineryCriticalException(RuntimeError):
"""
If this exception is thrown, processing of the entire input stream
is aborted instead of just aborting the processing of the current
chunk.
"""
pass
class RefineryException(RuntimeError):
"""
This is an exception that was not generated by an external library.
"""
pass
class Entry:
"""
An empty class marker. Any entry point unit (i.e. any unit that can be executed
via the command line) is an instance of this class.
"""
pass
class Argument:
"""
This class implements an abstract argument to a Python function, including positional
and keyword arguments. Passing an `Argument` to a Python function can be done via the
matrix multiplication operator: The syntax `function @ Argument(a, b, kwd=c)` is
equivalent to the call `function(a, b, kwd=c)`.
"""
__slots__ = 'args', 'kwargs'
args: List[Any]
kwargs: Dict[str, Any]
def __init__(self, *args, **kwargs):
self.args = list(args)
self.kwargs = kwargs
def __rmatmul__(self, method):
return method(*self.args, **self.kwargs)
def __repr__(self):
def rep(v):
r = repr(v)
if r.startswith('<'):
try:
return v.__name__
except AttributeError:
pass
try:
return v.__class__.__name__
except AttributeError:
pass
return r
arglist = [repr(a) for a in self.args]
arglist.extend(F'{key!s}={rep(value)}' for key, value in self.kwargs.items())
return ', '.join(arglist)
class Arg(Argument):
"""
This class is specifically an argument for the `add_argument` method of an `ArgumentParser` from
the `argparse` module. It can also be used as a decorator or annotation for the constructor of a
refinery unit to better control the argument parser of that unit's command line interface.
Example:
```
class prefixer(Unit):
def __init__(
self,
prefix: Arg.Binary(help='This data will be prepended to the input.')
): ...
def process(self, data):
return self.args.prefix + data
```
Note that when the init of a unit has a return annotation that is a base class of itself, then
all its parameters will automatically be forwarded to that base class.
"""
class delete: pass
class omit: pass
args: List[str]
def __init__(
self, *args: str,
action : Union[omit, str] = omit, # noqa
choices : Union[omit, Iterable[Any]] = omit, # noqa
const : Union[omit, Any] = omit, # noqa
default : Union[omit, Any] = omit, # noqa
dest : Union[omit, str] = omit, # noqa
help : Union[omit, str] = omit, # noqa
metavar : Union[omit, str] = omit, # noqa
nargs : Union[omit, int, str] = omit, # noqa
required : Union[omit, bool] = omit, # noqa
type : Union[omit, type] = omit, # noqa
group : Optional[str] = None, # noqa
guessed : Optional[Set[str]] = None, # noqa
) -> None:
kwargs = dict(action=action, choices=choices, const=const, default=default, dest=dest,
help=help, metavar=metavar, nargs=nargs, required=required, type=type)
kwargs = {key: value for key, value in kwargs.items() if value is not Arg.omit}
self.group = group
self.guessed = set(guessed or ())
super().__init__(*args, **kwargs)
def update_help(self):
if 'help' not in self.kwargs:
return
class formatting(dict):
arg = self
def __missing__(self, key):
if key == 'choices':
return ', '.join(self.arg.kwargs['choices'])
if key == 'default':
default: Union[bytes, int, str, slice] = self.arg.kwargs['default']
if isinstance(default, (list, tuple, set)):
if not default:
return 'empty'
elif len(default) == 1:
default = default[0]
if isinstance(default, slice):
parts = [default.start or '', default.stop or '', default.step]
default = ':'.join(str(x) for x in parts if x is not None)
if isinstance(default, int):
return default
if not isbuffer(default):
return default
if default.isalnum():
return default.decode('latin-1')
return F'H:{default.hex()}'
if key == 'varname':
return self.arg.kwargs.get('metavar', self.arg.destination)
try:
help_string: str = self.kwargs['help']
self.kwargs.update(
help=help_string.format_map(formatting()))
except Exception:
pass
def __rmatmul__(self, method):
self.update_help()
return super().__rmatmul__(method)
@staticmethod
def AsOption(value: Optional[Any], cls: Enum) -> Enum:
if value is None or isinstance(value, cls):
return value
if isinstance(value, str):
try: return cls[value]
except KeyError: pass
needle = normalize_to_identifier(value).casefold()
for item in cls.__members__:
if item.casefold() == needle:
return cls[item]
try:
return cls(value)
except Exception as E:
choices = ', '.join(normalize_to_display(m) for m in cls.__members__)
raise ValueError(F'Could not transform {value} into {cls.__name__}; the choices are: {choices}') from E
@classmethod
def Delete(cls):
return cls(nargs=cls.delete)
@classmethod
def Counts(
cls,
*args : str,
help : Union[omit, str] = omit,
dest : Union[omit, str] = omit,
group : Optional[str] = None,
):
"""
A convenience method to add argparse arguments that introduce a counter.
"""
return cls(*args, group=group, help=help, dest=dest, action='count')
@classmethod
def Switch(
cls,
*args : str, off=False,
help : Union[omit, str] = omit,
dest : Union[omit, str] = omit,
group : Optional[str] = None,
):
"""
A convenience method to add argparse arguments that change a boolean value from True to False or
vice versa. By default, a switch will have a False default and change it to True when specified.
"""
return cls(*args, group=group, help=help, dest=dest, action='store_false' if off else 'store_true')
@classmethod
def Binary(
cls,
*args : str,
help : Union[omit, str] = omit,
dest : Union[omit, str] = omit,
nargs : Union[omit, int, str] = omit,
metavar : Optional[str] = None,
group : Optional[str] = None,
):
"""
Used to add argparse arguments that contain binary data.
"""
if metavar is None and any('-' in a for a in args):
metavar = 'B'
return cls(*args, group=group, help=help, dest=dest, nargs=nargs, type=multibin, metavar=metavar)
@classmethod
def String(
cls,
*args : str,
help : Union[omit, str] = omit,
dest : Union[omit, str] = omit,
nargs : Union[omit, int, str] = omit,
metavar : Optional[str] = None,
group : Optional[str] = None,
):
"""
Used to add argparse arguments that contain string data.
"""
if metavar is None and any('-' in a for a in args):
metavar = 'STR'
return cls(*args, group=group, help=help, dest=dest, nargs=nargs, type=str, metavar=metavar)
@classmethod
def RegExp(
cls,
*args : str,
help : Union[omit, str] = omit,
dest : Union[omit, str] = omit,
nargs : Union[omit, int, str] = omit,
metavar : Optional[str] = None,
group : Optional[str] = None,
):
"""
Used to add argparse arguments that contain a regular expression.
"""
if metavar is None and any('-' in a for a in args):
metavar = 'REGEX'
return cls(*args, group=group, help=help, dest=dest, nargs=nargs, type=regexp, metavar=metavar)
@classmethod
def NumSeq(
cls,
*args : str,
help : Union[omit, str] = omit,
dest : Union[omit, str] = omit,
nargs : Union[omit, int, str] = omit,
metavar : Optional[str] = None,
group : Optional[str] = None,
):
"""
Used to add argparse arguments that contain a numeric sequence.
"""
return cls(*args, group=group, help=help, nargs=nargs, dest=dest, type=numseq, metavar=metavar)
@classmethod
def Bounds(
cls,
*args : str,
help : Optional[Union[omit, str]] = None,
dest : Union[omit, str] = omit,
nargs : Union[omit, int, str] = omit,
default : Union[omit, Any] = omit,
metavar : Optional[str] = 'start:end:step',
group : Optional[str] = None,
):
"""
Used to add argparse arguments that contain a slice.
"""
if help is None:
help = 'Specify start:end:step in Python slice syntax.'
if default is not cls.omit:
help = F'{help} The default is {{default}}.'
return cls(*args, group=group, help=help, default=default, nargs=nargs, dest=dest, type=sliceobj, metavar=metavar)
@classmethod
def Number(
cls,
*args : str,
bound : Union[omit, Tuple[int, int]] = omit,
help : Union[omit, str] = omit,
dest : Union[omit, str] = omit,
metavar : Optional[str] = None,
group : Optional[str] = None,
):
"""
Used to add argparse arguments that contain a number.
"""
nt = number
if bound is not cls.omit:
lower, upper = bound
nt = nt[lower:upper]
return cls(*args, group=group, help=help, dest=dest, type=nt, metavar=metavar or 'N')
@classmethod
def Option(
cls,
*args : str,
choices : Enum,
help : Union[omit, str] = omit,
dest : Union[omit, str] = omit,
metavar : Optional[str] = None,
group : Optional[str] = None,
):
"""
Used to add argparse arguments with a fixed set of options, based on an enumeration.
"""
cnames = [normalize_to_display(c).casefold() for c in choices.__members__]
metavar = metavar or choices.__name__
return cls(*args, group=group, help=help, metavar=metavar, dest=dest, choices=cnames, type=str.casefold)
@classmethod
def Choice(
cls,
*args : str,
choices : List[str],
help : Union[omit, str] = omit,
metavar : Union[omit, str] = omit,
dest : Union[omit, str] = omit,
type : Type = str,
nargs : Union[omit, int, str] = omit,
group : Optional[str] = None,
):
"""
Used to add argparse arguments with a fixed set of options, based on a list of strings.
"""
return cls(*args, group=group, type=type, metavar=metavar, nargs=nargs,
dest=dest, help=help, choices=choices)
@property
def positional(self) -> bool:
return any(a[0] != '-' for a in self.args)
@property
def destination(self) -> str:
"""
The name of the variable where the contents of this parsed argument will be stored.
"""
for a in self.args:
if a[0] != '-':
return a
try:
return self.kwargs['dest']
except KeyError:
for a in self.args:
if a.startswith('--'):
dest = normalize_to_identifier(a)
if dest.isidentifier():
return dest
raise AttributeError(F'The argument with these values has no destination: {self!r}')
@classmethod
def Infer(cls, pt: inspect.Parameter, module: Optional[str] = None):
"""
This class method can be used to infer the argparse argument for a Python function
parameter. This guess is based on the annotation, name, and default value.
"""
def needs_type(item: Dict[str, str]):
try:
return item['action'] == 'store'
except KeyError:
return True
def get_argp_type(annotation_type):
if issubclass(annotation_type, (bytes, bytearray, memoryview)):
return multibin
if issubclass(annotation_type, int):
return number
if issubclass(annotation_type, slice):
return sliceobj
return annotation_type
name = normalize_to_display(pt.name, False)
default = pt.default
guessed_pos_args = []
guessed_kwd_args = dict(dest=pt.name)
guessed = set()
annotation = pt.annotation
def guess(key, value):
try:
return guessed_kwd_args[key]
except KeyError:
guessed_kwd_args[key] = value
guessed.add(key)
return value
if isinstance(annotation, str):
symbols = None
while symbols is not False:
try:
annotation = eval(annotation, symbols)
except NameError:
if symbols is not None or module is None:
break
try:
import importlib
symbols = importlib.import_module(module).__dict__
except Exception:
symbols = False
except Exception:
pass
else:
break
if annotation is not pt.empty:
if isinstance(annotation, Arg):
if annotation.kwargs.get('dest', pt.name) != pt.name:
raise ValueError(
F'Incompatible argument destination specified; parameter {pt.name} '
F'was annotated with {annotation!r}.')
guessed_pos_args = annotation.args
guessed_kwd_args.update(annotation.kwargs)
guessed_kwd_args.update(group=annotation.group)
elif isinstance(annotation, type):
guessed.add('type')
if not issubclass(annotation, bool) and needs_type(guessed_kwd_args):
guessed_kwd_args.update(type=get_argp_type(annotation))
elif not isinstance(default, bool):
raise ValueError('Default value for boolean arguments must be provided.')
if not guessed_pos_args:
guessed_pos_args = guessed_pos_args or [F'--{name}' if pt.kind is pt.KEYWORD_ONLY else name]
if pt.kind is pt.VAR_POSITIONAL:
oldnargs = guess('nargs', ZERO_OR_MORE)
if oldnargs not in (ONE_OR_MORE, ZERO_OR_MORE, REMAINDER):
raise ValueError(F'Variadic positional arguments has nargs set to {oldnargs!r}')
return cls(*guessed_pos_args, **guessed_kwd_args)
if default is not pt.empty:
if isinstance(default, Enum):
default = default.name
if isinstance(default, (list, tuple)):
guess('nargs', ZERO_OR_MORE)
if not pt.default:
default = pt.empty
else:
guessed_kwd_args['default'] = pt.default
default = default[0]
else:
guessed_kwd_args['default'] = default
if pt.kind is pt.POSITIONAL_ONLY:
guess('nargs', OPTIONAL)
if default is not pt.empty:
if isinstance(default, bool):
action = 'store_false' if default else 'store_true'
guessed_kwd_args['action'] = action
elif needs_type(guessed_kwd_args):
guess('type', get_argp_type(type(default)))
return cls(*guessed_pos_args, **guessed_kwd_args, guessed=guessed)
def merge_args(self, them: Argument) -> None:
def iterboth():
yield from them.args
yield from self.args
if not self.args:
self.args = list(them.args)
return
sflag = None
lflag = None
for a in iterboth():
if a[:2] == '--': lflag = lflag or a
elif a[0] == '-': sflag = sflag or a
self.args = []
if sflag: self.args.append(sflag)
if lflag: self.args.append(lflag)
if not self.args:
self.args = list(them.args)
def merge_all(self, them: Arg) -> None:
for key, value in them.kwargs.items():
if value is Arg.delete:
self.kwargs.pop(key, None)
self.guessed.discard(key)
continue
if key in them.guessed:
if key not in self.guessed:
if key == 'type' and self.kwargs.get('action', None) != 'store':
continue
if key in self.kwargs:
continue
self.guessed.add(key)
self.kwargs[key] = value
self.merge_args(them)
self.group = them.group or self.group
def __copy__(self) -> Argument:
cls = self.__class__
clone = cls.__new__(cls)
clone.kwargs = dict(self.kwargs)
clone.args = list(self.args)
clone.group = self.group
clone.guessed = set(self.guessed)
return clone
def __repr__(self) -> str:
return F'{self.__class__.__name__}({super().__repr__()})'
def __call__(self, init: Callable) -> Callable:
parameters = inspect.signature(init).parameters
try:
inferred = Arg.Infer(parameters[self.destination])
inferred.merge_all(self)
init.__annotations__[self.destination] = inferred
except KeyError:
raise ValueError(F'Unable to decorate because no parameter with name {self.destination} exists.')
return init
class ArgumentSpecification(OrderedDict):
"""
A container object that stores `refinery.units.arg` specifications.
"""
def merge(self: Dict[str, Arg], argument: Arg):
"""
Insert or update the specification with the given argument.
"""
dest = argument.destination
if dest in self:
self[dest].merge_all(argument)
return
self[dest] = argument
DataType = TypeVar('DataType', bound=ByteString)
ProcType = Callable[['Unit', ByteString], Optional[Union[DataType, Iterable[DataType]]]]
_T = TypeVar('_T')
def UnitProcessorBoilerplate(operation: ProcType[ByteString]) -> ProcType[Chunk]:
@wraps(operation)
def wrapped(self: Unit, data: ByteString) -> Optional[Union[Chunk, Iterable[Chunk]]]:
ChunkType = Chunk
if data is None:
data = B''
typespec = get_type_hints(operation)
typespec.pop('return', None)
if typespec and len(typespec) == 1:
SpecType = next(iter(typespec.values()))
if isinstance(SpecType, str):
try: SpecType = eval(SpecType)
except Exception: pass
if isinstance(SpecType, type):
ChunkType = SpecType
if not isinstance(data, ChunkType):
data = ChunkType(data)
result = operation(self, data)
if isinstance(result, Chunk):
return result
elif not inspect.isgenerator(result):
return Chunk(result)
return (Chunk.Wrap(r) for r in result)
return wrapped
def UnitFilterBoilerplate(
operation : Callable[[Any, Iterable[Chunk]], Iterable[Chunk]]
) -> Callable[[Any, Iterable[Chunk]], Iterable[Chunk]]:
@wraps(operation)
def peekfilter(self, chunks: Iterable[Chunk]) -> Iterable[Chunk]:
def _apply_args_to_head():
it = iter(chunks)
for chunk in it:
if chunk.visible:
yield self.args @ chunk
break
else:
yield chunk
yield from it
yield from operation(self, _apply_args_to_head())
return peekfilter
class MissingFunction(metaclass=Singleton):
"""
A singleton class that represents a missing function. Used internally to
indicate that a unit does not implement a reverse operation.
"""
def __call__(*_, **__):
raise NotImplementedError
class Executable(ABCMeta):
"""
This is the metaclass for refinery units. A class which is of this type is
required to implement a method `run()`. If the class is created in the
currently executing module, then an instance of the class is automatically
created after it is defined and its `run()` method is invoked.
"""
Entry = None
"""
This variable stores the executable entry point. If more than one entry point
are present, only the first one is executed and an error message is generated
for the other ones.
"""
_argument_specification: Dict[str, Arg]
def _infer_argspec(cls, parameters: Dict[str, inspect.Parameter], args: Optional[Dict[str, Arg]], module: str):
args: Dict[str, Arg] = ArgumentSpecification() if args is None else args
exposed = [pt.name for pt in skipfirst(parameters.values()) if pt.kind != pt.VAR_KEYWORD]
# The arguments are added in reverse order to the argument parser later.
# This is done to have a more intuitive use of decorator based argument configuration.
exposed.reverse()
for name in exposed:
try:
argument = Arg.Infer(parameters[name], module)
except KeyError:
continue
args.merge(argument)
for name in exposed:
args.move_to_end(name)
for known in args.values():
if known.positional:
known.kwargs.pop('dest', None)
if 'default' in known.kwargs:
known.kwargs.setdefault('nargs', OPTIONAL)
elif not any(len(a) > 2 for a in known.args):
flagname = normalize_to_display(known.destination, False)
known.args.append(F'--{flagname}')
action: str = known.kwargs.get('action', 'store')
if action.startswith('store_'):
known.kwargs.pop('default', None)
continue
if action == 'store':
known.kwargs.setdefault('type', multibin)
return args
def __new__(mcs, name: str, bases: Sequence[Executable], nmspc: Dict[str, Any], abstract=False, extend_docs=False):
def decorate(**decorations):
for method, decorator in decorations.items():
try:
old = nmspc[method]
except KeyError:
continue
if getattr(old, '__isabstractmethod__', False):
continue
nmspc[method] = decorator(old)
decorate(
filter=UnitFilterBoilerplate,
process=UnitProcessorBoilerplate,
reverse=UnitProcessorBoilerplate,
__init__=no_type_check,
)
if not abstract and Entry not in bases:
bases = bases + (Entry,)
if not bases[0].is_reversible:
nmspc.setdefault('reverse', MissingFunction)
nmspc.setdefault('__doc__', '')
return super(Executable, mcs).__new__(mcs, name, bases, nmspc)
def __init__(cls, name: str, bases: Sequence[Executable], nmspc: Dict[str, Any], abstract=False, extend_docs=False):
super(Executable, cls).__init__(name, bases, nmspc)
cls._argument_specification = args = ArgumentSpecification()
cls_init = cls.__init__
sig_init = inspect.signature(cls_init)
parameters = sig_init.parameters
has_keyword = any(p.kind == p.VAR_KEYWORD for p in parameters.values())
inherited = []
for base in bases:
base: Executable
for key, value in base._argument_specification.items():
if key in parameters:
args[key] = value.__copy__()
if extend_docs and bases:
base_doc = bases[~0].__doc__.rstrip().lstrip('\n')
if base_doc:
cls.__doc__ = F'{cls.__doc__}\n{base_doc}'
if not abstract and bases and has_keyword:
for key, value in bases[0]._argument_specification.items():
if key not in args:
args[key] = value.__copy__()
inherited.append(key)
cls._infer_argspec(parameters, args, cls.__module__)
if not abstract and has_keyword:
cls__init__ = cls.__init__
@wraps(cls__init__)
def new__init__(self, *args, **kwargs):
cls__init__(self, *args, **kwargs)
params = [p for p in parameters.values() if p.kind != p.VAR_KEYWORD]
if inherited:
pp = inspect.signature(bases[0].__init__).parameters
for name in inherited:
params.append(pp[name])
new__init__.__signature__ = sig_init.replace(parameters=tuple(params))
cls.__init__ = new__init__
try:
initcode = cls.__init__.__code__.co_code
except AttributeError:
initcode = None
if initcode == (lambda: None).__code__.co_code:
base = bases[0]
head = []
defs = {}
tail = None
for p in skipfirst(parameters.values()):
if p.kind in (p.POSITIONAL_ONLY, p.POSITIONAL_OR_KEYWORD):
head.append(p.name)
if p.kind in (p.KEYWORD_ONLY, p.POSITIONAL_OR_KEYWORD) and p.default is not p.empty:
defs[p.name] = p.default
if p.kind is p.VAR_POSITIONAL:
tail = p.name
@wraps(cls.__init__)
def cls__init__(self, *args, **kw):
for name, arg in zip(head, args):
kw[name] = arg
if tail:
k = min(len(args), len(head))
kw[tail] = args[k:]
for key in defs:
if key not in kw:
kw[key] = defs[key]
base.__init__(self, **kw)
cls.__init__ = cls__init__
if not abstract and sys.modules[cls.__module__].__name__ == '__main__':
if not Executable.Entry:
Executable.Entry = cls.name
cls.run()
def __getitem__(cls, other):
return cls().__getitem__(other)
def __or__(cls, other):
return cls().__or__(other)
def __pos__(cls):
return cls()
def __neg__(cls):
unit: Unit = cls()
unit.args.reverse = 1
return unit
def __ror__(cls, other) -> Unit:
return cls().__ror__(other)
@property
def is_reversible(cls) -> bool:
"""
This property is `True` if and only if the unit has a member function named `reverse`. By convention,
this member function implements the inverse of `refinery.units.Unit.process`.
"""
if cls.reverse is MissingFunction:
return False
try:
return not cls.reverse.__isabstractmethod__
except AttributeError:
return True
@property
def codec(cls) -> str:
"""
The default codec for encoding textual information between units. The value of this property is
hardcoded to `UTF8`.
"""
return 'UTF8'
@property
def name(cls) -> str:
return normalize_to_display(cls.__name__)
@property
def logger(cls) -> Logger:
try:
return cls._logger
except AttributeError:
pass
cls._logger = _logger = logger(cls.name)
return _logger
class DelayedArgumentProxy:
"""
This class implements a proxy for the `args` member variable of `refinery.units.Unit`.
Its primary purpose is to proxy `refinery.lib.argformats.DelayedArgument` values which
can be computed only as soon as input data becomes available and which also have to be
recomputed for each input.
"""
_argv: Namespace
_argo: List[str]
_args: Dict[str, Any]
_done: bool
_guid: int
_lock: Lock
def __copy__(self):
cls = self.__class__
clone = cls.__new__(cls)
clone._store(
_lock=Lock(),
_argv=self._argv,
_argo=list(self._argo),
_args=dict(self._args),
_done=self._done,
_guid=self._guid,
)
return clone
def __iter__(self):
yield from self._args
def __getitem__(self, key):
return self._args[key]
def __init__(self, argv: Namespace, argo: Iterable[str]):
args = {}
done = True
for name, value in vars(argv).items():
if not pending(value):
args[name] = value
else:
done = False
self._store(
_lock=Lock(),
_argv=argv,
_argo=list(argo),
_args=args,
_done=done,
_guid=None,
)
def __call__(self, data: bytearray):
"""
Update the current arguments for the input `data`, regardless of whether or not this chunk
has already been used. In most cases, the matrix-multiplication syntax should be used instead
of this direct call: If a multibin argument modifies the meta dictionary by being applied, a
second interpretation of this argument with the same chunk might cause an error. For example,
if an argument specifies to pop a meta variable from the meta dictionary, this variable will
not be available for a second interpretation call.
"""
for name in self._argo:
if self._lock.locked():
raise RuntimeError(F'Attempting to resolve {name} while an update for this argument is in flight')
with self._lock:
value = getattr(self._argv, name, None)
if value and pending(value):
self._args[name] = manifest(value, data)
self._store(_guid=id(data))
return data
def __matmul__(self, data: bytearray):
"""
Interpret the current arguments for the given input `data`.
"""
if self._done:
return data
if not isinstance(data, bytearray):
data = bytearray(data)
if id(data) == self._guid:
return data
return self(data)
def _store(self, **kwargs):
self.__dict__.update(kwargs)
def __getattr__(self, name):
try:
return super().__getattr__(name)
except AttributeError:
pass
try:
return self._args[name]
except KeyError:
pass
try:
value = getattr(self._argv, name)
except AttributeError as E:
raise AttributeError(F'Argument {name} not set.') from E
if not value or not pending(value):
return value
raise AttributeError(F'the value {name} cannot be accessed until data is available.')
def __setattr__(self, name, value):
if not hasattr(self._argv, name):
self._argo.append(name)
if pending(value):
self._store(_done=False)
else:
self._args[name] = value
return setattr(self._argv, name, value)
class UnitBase(metaclass=Executable, abstract=True):
"""
This base class is an abstract interface specifying the abstract methods that have
to be present on any unit. All actual units should inherit from its only child class
`refinery.units.Unit`.
"""
@abc.abstractmethod
def process(self, data: ByteString) -> Union[Optional[ByteString], Iterable[ByteString]]:
"""
This routine is overridden by children of `refinery.units.Unit` to define how
the unit processes a given chunk of binary data.
"""
@abc.abstractmethod
def reverse(self, data: ByteString) -> Union[Optional[ByteString], Iterable[ByteString]]:
"""
If this routine is overridden by children of `refinery.units.Unit`, then it must
implement an operation that reverses the `refinery.units.Unit.process` operation.
The absence of an overload for this function is ignored for non-abstract children of
`refinery.units.UnitBase`.
"""
@abc.abstractclassmethod
def handles(self, data: ByteString) -> Optional[bool]:
"""
This tri-state routine returns `True` if the unit is certain that it can process the
given input data, and `False` if it is convinced of the opposite. `None` is returned
when no clear verdict is available.
"""
@abc.abstractmethod
def filter(self, inputs: Iterable[Chunk]) -> Iterable[Chunk]:
"""
Receives an iterable of `refinery.lib.frame.Chunk`s and yields only those that
should be processed. The default implementation returns the iterator without
change; this member function is designed to be overloaded by child classes of
`refinery.units.Unit` to allow inspection of an entire frame layer and altering
it before `refinery.units.Unit.process` is called on the individual chunks.
"""
@abc.abstractmethod
def finish(self) -> Iterable[Chunk]:
"""
Child classes of `refinery.units.Unit` can overwrite this method to generate a
stream of chunks to be processed after the last frame has been processed.
"""
class requirement(property):
pass
class Unit(UnitBase, abstract=True):
"""
The base class for all refinery units. It implements a small set of globally
available options and the handling for multiple inputs and outputs. All units
implement the _framing_ syntax for producing multiple outputs and ingesting
multiple inputs in a common format. For more details, see `refinery.lib.frame`.
"""
Arg = Arg
required_dependencies: Optional[Set[str]] = None
optional_dependencies: Optional[Dict[str, Set[str]]] = None
@staticmethod
def Requires(distribution: str, *_buckets: str):
class Requirement(requirement):
dependency: ClassVar[str] = distribution
required: ClassVar[bool] = not _buckets
def __init__(self, importer: Callable):
super().__init__(importer)
self.module = None
def __set_name__(self, unit: Type[Unit], name: str):
if self.required:
bucket = unit.required_dependencies
if bucket is None:
unit.required_dependencies = bucket = set()
buckets = [bucket]
else:
optmap = unit.optional_dependencies
if optmap is None:
unit.optional_dependencies = optmap = {}
buckets = [optmap.setdefault(name, set()) for name in _buckets]
for bucket in buckets:
bucket.add(self.dependency)
def __get__(self, unit: Optional[Type[Unit]], tp: Optional[Type[Executable]] = None):
if self.module is not None:
return self.module
try:
self.module = module = self.fget()
except ImportError as E:
deps = unit.optional_dependencies or {}
args = set()
for v in deps.values():
args.update(v)
raise RefineryImportMissing(self.dependency, *args) from E
except Exception as E:
raise AttributeError(F'module import for distribution "{distribution}" failed: {E!s}')
else:
return module
return Requirement
@property
def is_reversible(self) -> bool:
return self.__class__.is_reversible
@property
def codec(self) -> str:
return self.__class__.codec
@property
def logger(self):
logger: Logger = self.__class__.logger
return logger
@property
def name(self) -> str:
return self.__class__.name
@property
def is_quiet(self) -> bool:
try:
return self.args.quiet
except AttributeError:
return False
@property
def log_level(self) -> LogLevel:
"""
Returns the current log level as an element of `refinery.units.LogLevel`.
"""
if self.is_quiet:
return LogLevel.NONE
return LogLevel(self.logger.getEffectiveLevel())
@log_level.setter
def log_level(self, value: Union[int, LogLevel]) -> None:
if not isinstance(value, LogLevel):
value = LogLevel.FromVerbosity(value)
self.logger.setLevel(value)
def log_detach(self) -> None:
"""
When a unit is created using the `refinery.units.Unit.assemble` method, it is attached to a
logger by default (in less abstract terms, the `refinery.units.Unit.log_level` property is
set to a positive value). This method detaches the unit from its logger, which also means that
any exceptions that occur during runtime will be raised to the caller.
"""
self.log_level = LogLevel.DETACHED
return self
def __iter__(self) -> Generator[Chunk, None, None]:
return self
@property
def leniency(self) -> int:
return getattr(self.args, 'lenient', 0)
def _exception_handler(self, exception: BaseException, data: Optional[ByteString]):
if data is not None and self.leniency > 1:
try:
return exception.partial
except AttributeError:
return data
if isinstance(exception, RefineryPartialResult):
if self.leniency >= 1:
return exception.partial
if self.log_level < LogLevel.DETACHED:
self.log_warn(F'error, partial result returned: {exception}')
return None
raise exception
elif self.log_level >= LogLevel.DETACHED:
raise exception
elif isinstance(exception, RefineryCriticalException):
self.log_warn(F'critical error, terminating: {exception}')
raise exception
elif isinstance(exception, VariableMissing):
self.log_warn('critical error:', exception.args[0])
elif isinstance(exception, GeneratorExit):
raise exception
elif isinstance(exception, RefineryImportMissing):
self.log_fail(F'dependency {exception.missing} is missing; run pip install {exception.install}')
elif isinstance(exception, RefineryException):
self.log_fail(exception.args[0])
else:
try:
explanation = exception.args[0]
except (AttributeError, IndexError):
explanation = exception
if not isinstance(explanation, str):
explanation = exception
explanation = str(explanation).strip()
message = F'exception of type {exception.__class__.__name__}'
if explanation:
message = F'{message}; {explanation!s}'
if self.log_level <= LogLevel.INFO and data is not None:
from refinery.units.sinks.peek import peek
peeked = str(data | peek(lines=2, decode=True, stdout=True))
message = F'{message}\n{peeked}'
self.log_fail(message)
if self.log_debug():
import traceback
traceback.print_exc(file=sys.stderr)
def __next__(self) -> Chunk:
if not self._chunks:
self._chunks = iter(self._framehandler)
while True:
try:
return next(self._chunks)
except StopIteration:
raise
except RefineryCriticalException as R:
raise StopIteration from R
except BaseException as B:
self._exception_handler(B, None)
raise StopIteration from B
@property
def _framehandler(self) -> Framed:
if self._framed:
return self._framed
def normalized_action(data: ByteString) -> Generator[Chunk, None, None]:
try:
result = self.act(data)
if inspect.isgenerator(result):
yield from (x for x in result if x is not None)
elif result is not None:
yield result
except KeyboardInterrupt:
raise
except BaseException as B:
result = self._exception_handler(B, data)
message = str(B).strip() or 'unknown'
if result is not None:
yield self.labelled(result, error=message)
self._framed = Framed(
normalized_action,
self.source,
self.args.nesting,
self.args.squeeze,
self.filter,
self.finish,
)
return self._framed
def finish(self) -> Iterable[Chunk]:
yield from ()
def filter(self, inputs: Iterable[Chunk]) -> Iterable[Chunk]:
return inputs
@classmethod
def handles(self, data: bytearray) -> Optional[bool]:
return None
def reset(self):
try:
self._source.reset()
except AttributeError:
pass
self._framed = None
self._chunks = None
@property
def source(self):
"""
Represents a unit or binary IO stream which has been attached to this unit as its
source of input data.
"""
return self._source
@source.setter
def source(self, stream):
if isinstance(stream, self.__class__.__class__):
stream = stream()
if not isinstance(stream, self.__class__):
self.reset()
self._source = stream
@property
def nozzle(self) -> Unit:
"""
The nozzle is defined recursively as the nozzle of `refinery.units.Unit.source`
and `self` if no such thing exists. In other words, it is the leftmost unit in
a pipeline, where data should be inserted for processing.
"""
try:
return self.source.nozzle
except AttributeError:
return self
def __getitem__(self, unit: Union[Unit, Type[Unit], slice]):
if isinstance(unit, type):
unit = unit()
alpha = self.__copy__()
if isinstance(unit, slice):
if unit.start or unit.stop or unit.step:
raise ValueError
alpha.args.squeeze = True
return alpha
omega = unit.__copy__()
alpha.args.nesting += 1
omega.args.nesting -= 1
omega.nozzle.source = alpha
return omega
def __pos__(self):
return self
def __del__(self):
try:
self.nozzle.source.close()
except Exception:
pass
def __neg__(self) -> Unit:
pipeline = []
cursor = self
while isinstance(cursor, Unit):
reversed = copy.copy(cursor)
reversed.args.reverse = 1
reversed._source = None
reversed.reset()
pipeline.append(reversed)
cursor = cursor._source
reversed = None
while pipeline:
reversed = reversed | pipeline.pop()
return reversed
def __ror__(self, stream: Union[str, ByteIO, ByteString]):
if stream is None:
return self
if not isstream(stream):
if isinstance(stream, str):
stream = stream.encode(self.codec)
stream = MemoryFile(stream) if stream else open(os.devnull, 'rb')
self.reset()
self.nozzle.source = stream
return self
def __str__(self):
return self | str
def __bytes__(self):
return self | bytes
@overload
def __or__(self, stream: Callable[[ByteString], _T]) -> _T: ...
@overload
def __or__(self, stream: Union[Unit, Type[Unit]]) -> Unit: ...
@overload
def __or__(self, stream: dict) -> dict: ...
@overload
def __or__(self, stream: list) -> list: ...
@overload
def __or__(self, stream: set) -> set: ...
@overload
def __or__(self, stream: bytearray) -> bytearray: ...
@overload
def __or__(self, stream: memoryview) -> memoryview: ...
@overload
def __or__(self, stream: Type[None]) -> None: ...
@overload
def __or__(self, stream: Type[bytearray]) -> bytearray: ...
@overload
def __or__(self, stream: ByteIO) -> ByteIO: ...
def __or__(self, stream):
def get_converter(it: Iterable):
try:
c = one(it)
except LookupError:
return None
if ... is c:
def identity(x):
return x
return identity
if callable(c):
return c
if stream is None:
with open(os.devnull, 'wb') as null:
self | null
return
if isinstance(stream, type) and issubclass(stream, Entry):
stream = stream()
if isinstance(stream, type(...)):
def stream(c): return c
if isinstance(stream, Entry):
return stream.__copy__().__ror__(self)
elif isinstance(stream, list):
converter = get_converter(stream)
if converter is None:
stream.extend(self)
return stream
return [converter(chunk) for chunk in self]
elif isinstance(stream, set):
converter = get_converter(stream)
if converter is None:
stream.update(self)
return stream
return {converter(chunk) for chunk in self}
elif isinstance(stream, dict):
key, convert = one(stream.items())
output: Dict[Any, Union[List[Chunk], Set[Chunk]]] = {}
deconflict = None
if isinstance(convert, (list, set)):
deconflict = type(convert)
convert = one(convert)
for item in self:
try:
value = item.meta[key]
except KeyError:
value = None
if convert is not ...:
item = convert(item)
if deconflict:
bag = output.setdefault(value, deconflict())
if isinstance(bag, list):
bag.append(item)
else:
bag.add(item)
else:
output[value] = item
return output
elif isinstance(stream, (bytearray, memoryview)):
with MemoryFile(stream) as stdout:
return (self | stdout).getvalue()
elif callable(stream):
with MemoryFile(bytearray()) as stdout:
self | stdout
out: bytearray = stdout.getbuffer()
if isinstance(stream, type) and isinstance(out, stream):
return out
if isinstance(stream, type) and issubclass(stream, str):
out = out.decode(self.codec)
return stream(out)
stream: ByteIO
if not stream.writable():
raise ValueError('target stream is not writable')
self._target = stream
def cname(x: str):
return x.lower().replace('-', '')
recode = self.isatty and cname(self.codec) != cname(sys.stdout.encoding)
chunk = None
for last, chunk in lookahead(self):
if (
not last
and self._framehandler.framebreak
and not chunk.endswith(B'\n')
):
chunk.extend(B'\n')
if recode:
try:
chunk = chunk.decode(chunk, self.codec, errors='backslashreplace').encode(sys.stdout.encoding)
except Exception:
pass
try:
stream.write(chunk)
stream.flush()
except AttributeError:
pass
except (BrokenPipeError, OSError) as E:
if isinstance(E, BrokenPipeError) or E.errno != 32:
# This happens when the next unit does not consume everything
# we send. For example, this can happen when a large file is
# read in chunks and the pick unit is used to select only the
# first few of these.
self.log_debug(F'cannot send to next unit: {E}')
break
try:
if self.isatty and chunk and not chunk.endswith(B'\n'):
stream.write(B'\n')
stream.flush()
except (NameError, AttributeError):
pass
return stream
def read(self, bytecount: int = -1) -> bytes:
"""
Reads bytes from the output stream of this unit.
"""
if not bytecount or bytecount < 0:
return self.read1()
bfr = bytearray(bytecount)
offset = 0
while offset < bytecount:
tmp = self.read1(bytecount - offset)
if not tmp:
del bfr[offset:]
break
end = offset + len(tmp)
bfr[offset:end] = tmp
offset = end
return bytes(bfr)
def read1(self, bytecount: int = -1) -> bytes:
"""
Performs a single read against the output stream of this unit and returns
the result.
"""
try:
out = self._buffer or next(self)
if bytecount and bytecount > 0:
out, self._buffer = out[:bytecount], out[bytecount:]
elif self._buffer:
self._buffer = B''
return out
except StopIteration:
return B''
def act(self, data: Union[Chunk, ByteString]) -> Union[Optional[ByteString], Generator[ByteString, None, None]]:
mode = self.args.reverse
data = self.args @ data
if not mode:
return self.process(data)
elif mode % 2:
return self.reverse(data)
else:
return self.reverse(self.process(data))
def __call__(self, data: Optional[Union[ByteString, Chunk]] = None) -> bytes:
with MemoryFile(data) if data else open(os.devnull, 'rb') as stdin:
stdin: ByteIO
with MemoryFile() as stdout:
return (stdin | self | stdout).getvalue()
@classmethod
def labelled(cls, data: Union[Chunk, ByteString], **meta) -> Chunk:
"""
This class method can be used to label a chunk of binary output with metadata. This
metadata will be visible inside pipeline frames, see `refinery.lib.frame`.
"""
if isinstance(data, Chunk):
data.meta.update(meta)
return data
return Chunk(data, meta=meta)
def process(self, data: ByteString) -> Union[Optional[ByteString], Generator[ByteString, None, None]]:
return data
@classmethod
def log_fail(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool:
"""
Log the message if and only if the current log level is at least `refinery.units.LogLevel.ERROR`.
"""
rv = cls.logger.isEnabledFor(LogLevel.ERROR)
if rv and messages:
cls.logger.error(cls._output(*messages, clip=clip))
return rv
@classmethod
def log_warn(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool:
"""
Log the message if and only if the current log level is at least `refinery.units.LogLevel.WARN`.
"""
rv = cls.logger.isEnabledFor(LogLevel.WARNING)
if rv and messages:
cls.logger.warning(cls._output(*messages, clip=clip))
return rv
@classmethod
def log_info(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool:
"""
Log the message if and only if the current log level is at least `refinery.units.LogLevel.INFO`.
"""
rv = cls.logger.isEnabledFor(LogLevel.INFO)
if rv and messages:
cls.logger.info(cls._output(*messages, clip=clip))
return rv
@classmethod
def log_debug(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool:
"""
Log the pmessage if and only if the current log level is at least `refinery.units.LogLevel.DEBUG`.
"""
rv = cls.logger.isEnabledFor(LogLevel.DEBUG)
if rv and messages:
cls.logger.debug(cls._output(*messages, clip=clip))
return rv
@property
def isatty(self) -> bool:
try:
return self._target.isatty()
except AttributeError:
return False
@classmethod
def _output(cls, *messages, clip=False) -> str:
def transform(message):
if callable(message):
message = message()
if isinstance(message, Exception):
args = [arg for arg in message.args if isinstance(arg, str)]
if len(args) == 1:
message = args[0]
else:
message = str(message)
if isinstance(message, str):
return message
if isbuffer(message):
import codecs
message: Union[bytes, bytearray, memoryview]
pmsg: str = codecs.decode(message, cls.codec, 'surrogateescape')
if not pmsg.isprintable():
pmsg = message.hex().upper()
return pmsg
else:
import pprint
return pprint.pformat(message)
message = ' '.join(transform(msg) for msg in messages)
if clip:
from refinery.lib.tools import get_terminal_size
length = get_terminal_size(75) - len(cls.name) - 27
message = message[:length] + "..."
return message
@classmethod
def _interface(cls, argp: ArgumentParserWithKeywordHooks) -> ArgumentParserWithKeywordHooks:
"""
Receives a reference to an argument parser. This parser will be used to parse
the command line for this unit into the member variable called `args`.
"""
base = argp.add_argument_group('generic options')
base.set_defaults(reverse=False, squeeze=False)
base.add_argument('-h', '--help', action='help', help='Show this help message and exit.')
base.add_argument('-L', '--lenient', action='count', default=0, help='Allow partial results as output.')
base.add_argument('-Q', '--quiet', action='store_true', help='Disables all log output.')
base.add_argument('-0', '--devnull', action='store_true', help='Do not produce any output.')
base.add_argument('-v', '--verbose', action='count', default=0,
help='Specify up to two times to increase log level.')
if cls.is_reversible:
base.add_argument('-R', '--reverse', action='count', default=0,
help='Use the reverse operation; Specify twice to normalize (first decode, then encode).')
groups = {None: argp}
for argument in reversed(cls._argument_specification.values()):
gp = argument.group
if gp not in groups:
groups[gp] = argp.add_mutually_exclusive_group()
try:
groups[gp].add_argument @ argument
except Exception:
raise RefineryCriticalException(F'Failed to queue argument: {argument!s}')
return argp
@classmethod
def argparser(cls, **keywords):
argp = ArgumentParserWithKeywordHooks(
keywords, prog=cls.name, description=documentation(cls), add_help=False)
argp.set_defaults(nesting=0)
return cls._interface(argp)
@staticmethod
def superinit(spc, **keywords):
"""
This function uses `refinery.lib.tools.autoinvoke` to call the `__init__` function of `super` with
by taking all required parameters from `keywords`, ignoring the rest. Calling
```
self.superinit(super(), **vars())
```
will therefore perform initialization of the parent class without having to forward all parameters
manually. This is a convenience feature which reduces code bloat when many parameters have to be
forwarded, see e.g. `refinery.units.pattern.carve.carve` for an example.
"""
my_own_args = iter(inspect.signature(spc.__thisclass__.__init__).parameters.values())
parent_args = inspect.signature(spc.__init__).parameters
keywords.pop(next(my_own_args).name, None)
for a in my_own_args:
if a.kind is a.VAR_KEYWORD:
keywords.update(keywords.pop(a.name, {}))
junk = [a for a in keywords]
for a in parent_args.values():
if a.kind is a.VAR_KEYWORD:
junk = [j for j in junk if j.startswith('_')]
break
try: junk.remove(a.name)
except ValueError: pass
for j in junk:
del keywords[j]
try:
if spc.__init__.__func__ is Unit.__init__:
return spc.__init__(**keywords)
except AttributeError:
pass
return autoinvoke(spc.__init__, keywords)
@classmethod
def assemble(cls, *args, **keywords):
"""
Creates a unit from the given arguments and keywords. The given keywords are used to overwrite any
previously specified defaults for the argument parser of the unit, then this modified parser is
used to parse the given list of arguments as though they were given on the command line. The parser
results are used to construct an instance of the unit, this object is consequently returned.
"""
argp = cls.argparser(**keywords)
args = argp.parse_args_with_nesting(args)
try:
unit = autoinvoke(cls, args.__dict__)
except ValueError as E:
argp.error(str(E))
else:
unit.args._store(_argo=argp.order)
unit.args.quiet = args.quiet
unit.args.lenient = args.lenient
unit.args.squeeze = args.squeeze
unit.args.nesting = args.nesting
unit.args.reverse = args.reverse
unit.args.devnull = args.devnull
unit.args.verbose = args.verbose
if args.quiet:
unit.log_level = LogLevel.NONE
else:
unit.log_level = args.verbose
return unit
def __copy__(self):
cls = self.__class__
clone: Unit = cls.__new__(cls)
clone.__dict__.update(self.__dict__)
# TODO: Preferably, units should keep all their information in args, making
# the above __dict__ update unnecessary.
# clone._buffer = self._buffer
# clone._source = self._source
clone._target = None
clone._framed = None
clone._chunks = None
clone.args = copy.copy(self.args)
return clone
def __init__(self, **keywords):
self._buffer = B''
self._source = None
self._target = None
self._framed = None
self._chunks = None
keywords.update(dict(
nesting=0,
reverse=False,
squeeze=False,
devnull=False,
quiet=False,
))
# Since Python 3.6, functions always preserve the order of the keyword
# arguments passed to them (see PEP 468).
self.args = DelayedArgumentProxy(Namespace(**keywords), list(keywords))
self.log_detach()
_SECRET_DEBUG_TIMING_FLAG = '--debug-timing'
_SECRET_DEBUG_TRACES_FLAG = '--debug-traces'
_SECRET_YAPPI_TIMING_FLAG = '--yappi-timing'
@classmethod
def run(cls: Union[Type[Unit], Executable], argv=None, stream=None) -> None:
"""
Implements command line execution. As `refinery.units.Unit` is an `refinery.units.Executable`,
this method will be executed when a class inheriting from `refinery.units.Unit` is defined in
the current `__main__` module.
"""
if not environment.disable_ps1_bandaid.value:
from refinery.lib import powershell
ps1 = powershell.bandaid(cls.codec)
else:
ps1 = None
try:
sys.set_int_max_str_digits(0)
except AttributeError:
pass
argv = argv if argv is not None else sys.argv[1:]
clock = None
yappi = None
trace = False
if cls._SECRET_DEBUG_TRACES_FLAG in argv:
trace = True
argv.remove(cls._SECRET_DEBUG_TRACES_FLAG)
if cls._SECRET_DEBUG_TIMING_FLAG in argv:
from time import process_time
argv.remove(cls._SECRET_DEBUG_TIMING_FLAG)
clock = process_time()
cls.logger.setLevel(LogLevel.INFO)
cls.logger.info('starting clock: {:.4f}'.format(clock))
if cls._SECRET_YAPPI_TIMING_FLAG in argv:
argv.remove(cls._SECRET_YAPPI_TIMING_FLAG)
try:
import yappi as _yappi
except ImportError:
cls.logger.warn('unable to start yappi; package is missing')
else:
yappi = _yappi
if stream is None:
stream = open(os.devnull, 'rb') if sys.stdin.isatty() else sys.stdin.buffer
with stream as source:
try:
unit = cls.assemble(*argv)
except ArgparseError as ap:
ap.parser.error_commandline(str(ap))
return
except Exception as msg:
if not trace:
cls.logger.critical(cls._output('initialization failed:', msg))
else:
from traceback import format_exc
for line in format_exc().splitlines(keepends=False):
cls.logger.critical(cls._output(line))
return
if ps1:
unit.log_debug(F'applying PowerShell band-aid for: {unit.name}')
loglevel = environment.verbosity.value
if loglevel:
unit.log_level = loglevel
if clock:
unit.log_level = min(unit.log_level, LogLevel.INFO)
unit.logger.info('unit launching: {:.4f}'.format(clock))
if yappi is not None:
yappi.set_clock_type('cpu')
yappi.start()
try:
with open(os.devnull, 'wb') if unit.args.devnull else sys.stdout.buffer as output:
source | unit | output
except ParserVariableMissing as E:
unit.logger.error(F'the variable "{E!s}" was missing while trying to parse an expression')
except ArgumentTypeError as E:
unit.logger.error(F'delayed argument initialization failed: {E!s}')
except KeyboardInterrupt:
unit.logger.warning('aborting due to keyboard interrupt')
except OSError:
pass
if yappi is not None:
stats = yappi.get_func_stats()
filename = F'{unit.name}.perf'
stats.save(filename, type='CALLGRIND')
cls.logger.info(F'wrote yappi results to file: {filename}')
if clock:
stop_clock = process_time()
unit.logger.info('stopping clock: {:.4f}'.format(stop_clock))
unit.logger.info('time delta was: {:.4f}'.format(stop_clock - clock))
__pdoc__ = {
'Unit.is_reversible': Executable.is_reversible.__doc__,
'Unit.codec': Executable.codec.__doc__
}Sub-modules
refinery.units.blockwise-
Contains all units that can work on blocks a fixed length. Note that block cipher algorithms can be found in
refinery.units.crypto.cipher. refinery.units.compression-
A collection of compression algorithms. The unit
decompressimplements a brute force heuristic decompressor that attempts all known … refinery.units.crypto-
Cryptographic routines, cipher and key derivation units.
refinery.units.encoding-
Encoding and decoding of various formats.
refinery.units.formats-
A package containing several sub-packages for various data formats.
refinery.units.malwarerefinery.units.meta-
A package for units that operate primarily on frames of several of inputs.
refinery.units.misc-
Units whose purpose is narrow or very special and does not fit well into any other category.
refinery.units.obfuscationrefinery.units.pattern-
Pattern matching based extraction and substitution units.
refinery.units.sinksrefinery.units.strings-
Simple operations on strings, such as concatenation, replacement, slicing, trimming, etcetera.
Functions
def UnitProcessorBoilerplate(operation)-
Expand source code Browse git
def UnitProcessorBoilerplate(operation: ProcType[ByteString]) -> ProcType[Chunk]: @wraps(operation) def wrapped(self: Unit, data: ByteString) -> Optional[Union[Chunk, Iterable[Chunk]]]: ChunkType = Chunk if data is None: data = B'' typespec = get_type_hints(operation) typespec.pop('return', None) if typespec and len(typespec) == 1: SpecType = next(iter(typespec.values())) if isinstance(SpecType, str): try: SpecType = eval(SpecType) except Exception: pass if isinstance(SpecType, type): ChunkType = SpecType if not isinstance(data, ChunkType): data = ChunkType(data) result = operation(self, data) if isinstance(result, Chunk): return result elif not inspect.isgenerator(result): return Chunk(result) return (Chunk.Wrap(r) for r in result) return wrapped def UnitFilterBoilerplate(operation)-
Expand source code Browse git
def UnitFilterBoilerplate( operation : Callable[[Any, Iterable[Chunk]], Iterable[Chunk]] ) -> Callable[[Any, Iterable[Chunk]], Iterable[Chunk]]: @wraps(operation) def peekfilter(self, chunks: Iterable[Chunk]) -> Iterable[Chunk]: def _apply_args_to_head(): it = iter(chunks) for chunk in it: if chunk.visible: yield self.args @ chunk break else: yield chunk yield from it yield from operation(self, _apply_args_to_head()) return peekfilter
Classes
class RefineryPartialResult (message, partial, rest=None)-
This exception indicates that a partial result is available.
Expand source code Browse git
class RefineryPartialResult(ValueError): """ This exception indicates that a partial result is available. """ def __init__(self, message: str, partial: ByteString, rest: Optional[ByteString] = None): super().__init__(message) self.message = message self.partial = partial self.rest = rest def __str__(self): return self.messageAncestors
- builtins.ValueError
- builtins.Exception
- builtins.BaseException
Subclasses
- refinery.units.obfuscation.AutoDeobfuscationTimeout
class RefineryImportMissing (missing, *dependencies)-
Module not found.
Expand source code Browse git
class RefineryImportMissing(ModuleNotFoundError): def __init__(self, missing: str, *dependencies: str): super().__init__() import shlex self.missing = missing self.install = ' '.join(shlex.quote(dist) for dist in dependencies) self.dependencies = dependenciesAncestors
- builtins.ModuleNotFoundError
- builtins.ImportError
- builtins.Exception
- builtins.BaseException
class RefineryCriticalException (*args, **kwargs)-
If this exception is thrown, processing of the entire input stream is aborted instead of just aborting the processing of the current chunk.
Expand source code Browse git
class RefineryCriticalException(RuntimeError): """ If this exception is thrown, processing of the entire input stream is aborted instead of just aborting the processing of the current chunk. """ passAncestors
- builtins.RuntimeError
- builtins.Exception
- builtins.BaseException
class RefineryException (*args, **kwargs)-
This is an exception that was not generated by an external library.
Expand source code Browse git
class RefineryException(RuntimeError): """ This is an exception that was not generated by an external library. """ passAncestors
- builtins.RuntimeError
- builtins.Exception
- builtins.BaseException
class Entry-
An empty class marker. Any entry point unit (i.e. any unit that can be executed via the command line) is an instance of this class.
Expand source code Browse git
class Entry: """ An empty class marker. Any entry point unit (i.e. any unit that can be executed via the command line) is an instance of this class. """ passSubclasses
- add
- alu
- bitrev
- bitsnip
- byteswap
- map
- neg
- pack
- rev
- rotl
- rotr
- shl
- shr
- sub
- terminate
- xor
- aplib
- blz
- bz2
- decompress
- jcalg
- lzma
- lz4
- lzf
- lzg
- lzip
- lzjb
- lznt1
- lzo
- lzw
- mscf
- nrv2b
- nrv2d
- nrv2e
- qlz
- szdd
- zl
- zstd
- aes
- blabla
- blowfish
- camellia
- cast
- chacha
- chacha20
- chaskey
- des
- des3
- fernet
- gost
- hc128
- hc256
- isaac
- rabbit
- rc2
- rc4
- rc4mod
- rc5
- rc6
- rijndael
- rncrypt
- rot
- rsa
- rsakey
- salsa
- salsa20
- seal
- secstr
- serpent
- sm4
- sosemanuk
- tea
- vigenere
- xtea
- xxtea
- adler32
- crc32
- blk224
- blk256
- blk384
- blk512
- md2
- md4
- md5
- ripemd128
- ripemd160
- sha1
- sha224
- sha256
- sha384
- sha512
- imphash
- mmh128x32
- mmh128x64
- mmh32
- ntlm
- xxh
- deskd
- HKDF
- hmac
- kblob
- mscdk
- mspdb
- pbkdf1
- pbkdf2
- ucrypt
- atbash
- b32
- b58
- b64
- b85
- base
- cp1252
- esc
- hex
- htmlesc
- netbios
- ps1str
- recode
- u16
- url
- uuenc
- wshenc
- a3x
- xt
- xt7z
- xtace
- xtasar
- xtcab
- xtcpio
- xtgz
- xtiso
- xtiss
- xtmacho
- xtmagtape
- xtnode
- xtnsis
- xtnuitka
- xtpyi
- xttar
- xtzip
- xtzpaq
- bat
- csv
- dsphp
- dexstr
- xtmail
- evtx
- opc
- vaddr
- vmemref
- vsect
- vsnip
- vstack
- hexload
- xthtml
- httpresponse
- ifps
- ifpsstr
- dsjava
- jvdasm
- jvstr
- xj0
- xjl
- xtjson
- lnk
- machometa
- msgpack
- xtmsi
- doctxt
- officecrypt
- vbapc
- vbastr
- xlmdeobf
- xlxtr
- xtdoc
- xtone
- xtrtf
- xtvba
- pcap
- pcap_http
- xtpdf
- dnblob
- dncfx
- dnds
- dnfields
- dnhdr
- dnmr
- dnrc
- dnsfx
- dnstr
- pedebloat
- pemeta
- peoverlay
- perc
- pesig
- pestrip
- pkcs7
- pkcs7sig
- pyc
- stego
- tnetmtm
- winreg
- xtxml
- n40
- chop
- cm
- cull
- dedup
- eat
- ef
- emit
- group
- groupby
- iff
- iffp
- iffs
- iffx
- max_
- min_
- mvg
- pad
- pick
- pop
- push
- put
- qb
- qf
- reduce
- rmv
- scope
- sep
- sorted
- swap
- transpose
- xfcc
- autoxor
- couple
- datefix
- drp
- nop
- urlfix
- xkey
- deob_js_arrays
- deob_js_getattr
- deob_js_tuples
- deob_ps1
- deob_ps1_b64convert
- deob_ps1_brackets
- deob_ps1_cases
- deob_ps1_concat
- deob_ps1_encodings
- deob_ps1_escape
- deob_ps1_format
- deob_ps1_invoke
- deob_ps1_secstr
- deob_ps1_stringreplace
- deob_ps1_typecast
- deob_ps1_uncurly
- deob_vba
- deob_vba_arithmetic
- deob_vba_brackets
- deob_vba_char_function
- deob_vba_comments
- deob_vba_concat
- deob_vba_constants
- deob_vba_dummy_variables
- deob_vba_stringreplace
- deob_vba_stringreverse
- deob_vba_chr_literals
- carve
- carve_7z
- carve_json
- carve_lnk
- carve_pe
- carve_rtf
- carve_xml
- carve_zip
- defang
- dnsdomain
- mimewords
- resplit
- resub
- rex
- struct
- subfiles
- urlguards
- xtp
- xtw
- asm
- dump
- iemap
- peek
- ppjscript
- ppjson
- ppxml
- bruteforce
- cca
- ccp
- cfmt
- clower
- cswap
- cupper
- ngrams
- rep
- repl
- snip
- stretch
- termfit
- trim
class Argument (*args, **kwargs)-
This class implements an abstract argument to a Python function, including positional and keyword arguments. Passing an
Argumentto a Python function can be done via the matrix multiplication operator: The syntaxfunction @ Argument(a, b, kwd=c)is equivalent to the callfunction(a, b, kwd=c).Expand source code Browse git
class Argument: """ This class implements an abstract argument to a Python function, including positional and keyword arguments. Passing an `Argument` to a Python function can be done via the matrix multiplication operator: The syntax `function @ Argument(a, b, kwd=c)` is equivalent to the call `function(a, b, kwd=c)`. """ __slots__ = 'args', 'kwargs' args: List[Any] kwargs: Dict[str, Any] def __init__(self, *args, **kwargs): self.args = list(args) self.kwargs = kwargs def __rmatmul__(self, method): return method(*self.args, **self.kwargs) def __repr__(self): def rep(v): r = repr(v) if r.startswith('<'): try: return v.__name__ except AttributeError: pass try: return v.__class__.__name__ except AttributeError: pass return r arglist = [repr(a) for a in self.args] arglist.extend(F'{key!s}={rep(value)}' for key, value in self.kwargs.items()) return ', '.join(arglist)Subclasses
Instance variables
var args-
Return an attribute of instance, which is of type owner.
var kwargs-
Return an attribute of instance, which is of type owner.
class Arg (*args, action=refinery.units.Arg.omit, choices=refinery.units.Arg.omit, const=refinery.units.Arg.omit, default=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, help=refinery.units.Arg.omit, metavar=refinery.units.Arg.omit, nargs=refinery.units.Arg.omit, required=refinery.units.Arg.omit, type=refinery.units.Arg.omit, group=None, guessed=None)-
This class is specifically an argument for the
add_argumentmethod of anArgumentParserfrom theargparsemodule. It can also be used as a decorator or annotation for the constructor of a refinery unit to better control the argument parser of that unit's command line interface. Example:class prefixer(Unit): def __init__( self, prefix: Arg.Binary(help='This data will be prepended to the input.') ): ... def process(self, data): return self.args.prefix + dataNote that when the init of a unit has a return annotation that is a base class of itself, then all its parameters will automatically be forwarded to that base class.
Expand source code Browse git
class Arg(Argument): """ This class is specifically an argument for the `add_argument` method of an `ArgumentParser` from the `argparse` module. It can also be used as a decorator or annotation for the constructor of a refinery unit to better control the argument parser of that unit's command line interface. Example: ``` class prefixer(Unit): def __init__( self, prefix: Arg.Binary(help='This data will be prepended to the input.') ): ... def process(self, data): return self.args.prefix + data ``` Note that when the init of a unit has a return annotation that is a base class of itself, then all its parameters will automatically be forwarded to that base class. """ class delete: pass class omit: pass args: List[str] def __init__( self, *args: str, action : Union[omit, str] = omit, # noqa choices : Union[omit, Iterable[Any]] = omit, # noqa const : Union[omit, Any] = omit, # noqa default : Union[omit, Any] = omit, # noqa dest : Union[omit, str] = omit, # noqa help : Union[omit, str] = omit, # noqa metavar : Union[omit, str] = omit, # noqa nargs : Union[omit, int, str] = omit, # noqa required : Union[omit, bool] = omit, # noqa type : Union[omit, type] = omit, # noqa group : Optional[str] = None, # noqa guessed : Optional[Set[str]] = None, # noqa ) -> None: kwargs = dict(action=action, choices=choices, const=const, default=default, dest=dest, help=help, metavar=metavar, nargs=nargs, required=required, type=type) kwargs = {key: value for key, value in kwargs.items() if value is not Arg.omit} self.group = group self.guessed = set(guessed or ()) super().__init__(*args, **kwargs) def update_help(self): if 'help' not in self.kwargs: return class formatting(dict): arg = self def __missing__(self, key): if key == 'choices': return ', '.join(self.arg.kwargs['choices']) if key == 'default': default: Union[bytes, int, str, slice] = self.arg.kwargs['default'] if isinstance(default, (list, tuple, set)): if not default: return 'empty' elif len(default) == 1: default = default[0] if isinstance(default, slice): parts = [default.start or '', default.stop or '', default.step] default = ':'.join(str(x) for x in parts if x is not None) if isinstance(default, int): return default if not isbuffer(default): return default if default.isalnum(): return default.decode('latin-1') return F'H:{default.hex()}' if key == 'varname': return self.arg.kwargs.get('metavar', self.arg.destination) try: help_string: str = self.kwargs['help'] self.kwargs.update( help=help_string.format_map(formatting())) except Exception: pass def __rmatmul__(self, method): self.update_help() return super().__rmatmul__(method) @staticmethod def AsOption(value: Optional[Any], cls: Enum) -> Enum: if value is None or isinstance(value, cls): return value if isinstance(value, str): try: return cls[value] except KeyError: pass needle = normalize_to_identifier(value).casefold() for item in cls.__members__: if item.casefold() == needle: return cls[item] try: return cls(value) except Exception as E: choices = ', '.join(normalize_to_display(m) for m in cls.__members__) raise ValueError(F'Could not transform {value} into {cls.__name__}; the choices are: {choices}') from E @classmethod def Delete(cls): return cls(nargs=cls.delete) @classmethod def Counts( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, group : Optional[str] = None, ): """ A convenience method to add argparse arguments that introduce a counter. """ return cls(*args, group=group, help=help, dest=dest, action='count') @classmethod def Switch( cls, *args : str, off=False, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, group : Optional[str] = None, ): """ A convenience method to add argparse arguments that change a boolean value from True to False or vice versa. By default, a switch will have a False default and change it to True when specified. """ return cls(*args, group=group, help=help, dest=dest, action='store_false' if off else 'store_true') @classmethod def Binary( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain binary data. """ if metavar is None and any('-' in a for a in args): metavar = 'B' return cls(*args, group=group, help=help, dest=dest, nargs=nargs, type=multibin, metavar=metavar) @classmethod def String( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain string data. """ if metavar is None and any('-' in a for a in args): metavar = 'STR' return cls(*args, group=group, help=help, dest=dest, nargs=nargs, type=str, metavar=metavar) @classmethod def RegExp( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain a regular expression. """ if metavar is None and any('-' in a for a in args): metavar = 'REGEX' return cls(*args, group=group, help=help, dest=dest, nargs=nargs, type=regexp, metavar=metavar) @classmethod def NumSeq( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain a numeric sequence. """ return cls(*args, group=group, help=help, nargs=nargs, dest=dest, type=numseq, metavar=metavar) @classmethod def Bounds( cls, *args : str, help : Optional[Union[omit, str]] = None, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, default : Union[omit, Any] = omit, metavar : Optional[str] = 'start:end:step', group : Optional[str] = None, ): """ Used to add argparse arguments that contain a slice. """ if help is None: help = 'Specify start:end:step in Python slice syntax.' if default is not cls.omit: help = F'{help} The default is {{default}}.' return cls(*args, group=group, help=help, default=default, nargs=nargs, dest=dest, type=sliceobj, metavar=metavar) @classmethod def Number( cls, *args : str, bound : Union[omit, Tuple[int, int]] = omit, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain a number. """ nt = number if bound is not cls.omit: lower, upper = bound nt = nt[lower:upper] return cls(*args, group=group, help=help, dest=dest, type=nt, metavar=metavar or 'N') @classmethod def Option( cls, *args : str, choices : Enum, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments with a fixed set of options, based on an enumeration. """ cnames = [normalize_to_display(c).casefold() for c in choices.__members__] metavar = metavar or choices.__name__ return cls(*args, group=group, help=help, metavar=metavar, dest=dest, choices=cnames, type=str.casefold) @classmethod def Choice( cls, *args : str, choices : List[str], help : Union[omit, str] = omit, metavar : Union[omit, str] = omit, dest : Union[omit, str] = omit, type : Type = str, nargs : Union[omit, int, str] = omit, group : Optional[str] = None, ): """ Used to add argparse arguments with a fixed set of options, based on a list of strings. """ return cls(*args, group=group, type=type, metavar=metavar, nargs=nargs, dest=dest, help=help, choices=choices) @property def positional(self) -> bool: return any(a[0] != '-' for a in self.args) @property def destination(self) -> str: """ The name of the variable where the contents of this parsed argument will be stored. """ for a in self.args: if a[0] != '-': return a try: return self.kwargs['dest'] except KeyError: for a in self.args: if a.startswith('--'): dest = normalize_to_identifier(a) if dest.isidentifier(): return dest raise AttributeError(F'The argument with these values has no destination: {self!r}') @classmethod def Infer(cls, pt: inspect.Parameter, module: Optional[str] = None): """ This class method can be used to infer the argparse argument for a Python function parameter. This guess is based on the annotation, name, and default value. """ def needs_type(item: Dict[str, str]): try: return item['action'] == 'store' except KeyError: return True def get_argp_type(annotation_type): if issubclass(annotation_type, (bytes, bytearray, memoryview)): return multibin if issubclass(annotation_type, int): return number if issubclass(annotation_type, slice): return sliceobj return annotation_type name = normalize_to_display(pt.name, False) default = pt.default guessed_pos_args = [] guessed_kwd_args = dict(dest=pt.name) guessed = set() annotation = pt.annotation def guess(key, value): try: return guessed_kwd_args[key] except KeyError: guessed_kwd_args[key] = value guessed.add(key) return value if isinstance(annotation, str): symbols = None while symbols is not False: try: annotation = eval(annotation, symbols) except NameError: if symbols is not None or module is None: break try: import importlib symbols = importlib.import_module(module).__dict__ except Exception: symbols = False except Exception: pass else: break if annotation is not pt.empty: if isinstance(annotation, Arg): if annotation.kwargs.get('dest', pt.name) != pt.name: raise ValueError( F'Incompatible argument destination specified; parameter {pt.name} ' F'was annotated with {annotation!r}.') guessed_pos_args = annotation.args guessed_kwd_args.update(annotation.kwargs) guessed_kwd_args.update(group=annotation.group) elif isinstance(annotation, type): guessed.add('type') if not issubclass(annotation, bool) and needs_type(guessed_kwd_args): guessed_kwd_args.update(type=get_argp_type(annotation)) elif not isinstance(default, bool): raise ValueError('Default value for boolean arguments must be provided.') if not guessed_pos_args: guessed_pos_args = guessed_pos_args or [F'--{name}' if pt.kind is pt.KEYWORD_ONLY else name] if pt.kind is pt.VAR_POSITIONAL: oldnargs = guess('nargs', ZERO_OR_MORE) if oldnargs not in (ONE_OR_MORE, ZERO_OR_MORE, REMAINDER): raise ValueError(F'Variadic positional arguments has nargs set to {oldnargs!r}') return cls(*guessed_pos_args, **guessed_kwd_args) if default is not pt.empty: if isinstance(default, Enum): default = default.name if isinstance(default, (list, tuple)): guess('nargs', ZERO_OR_MORE) if not pt.default: default = pt.empty else: guessed_kwd_args['default'] = pt.default default = default[0] else: guessed_kwd_args['default'] = default if pt.kind is pt.POSITIONAL_ONLY: guess('nargs', OPTIONAL) if default is not pt.empty: if isinstance(default, bool): action = 'store_false' if default else 'store_true' guessed_kwd_args['action'] = action elif needs_type(guessed_kwd_args): guess('type', get_argp_type(type(default))) return cls(*guessed_pos_args, **guessed_kwd_args, guessed=guessed) def merge_args(self, them: Argument) -> None: def iterboth(): yield from them.args yield from self.args if not self.args: self.args = list(them.args) return sflag = None lflag = None for a in iterboth(): if a[:2] == '--': lflag = lflag or a elif a[0] == '-': sflag = sflag or a self.args = [] if sflag: self.args.append(sflag) if lflag: self.args.append(lflag) if not self.args: self.args = list(them.args) def merge_all(self, them: Arg) -> None: for key, value in them.kwargs.items(): if value is Arg.delete: self.kwargs.pop(key, None) self.guessed.discard(key) continue if key in them.guessed: if key not in self.guessed: if key == 'type' and self.kwargs.get('action', None) != 'store': continue if key in self.kwargs: continue self.guessed.add(key) self.kwargs[key] = value self.merge_args(them) self.group = them.group or self.group def __copy__(self) -> Argument: cls = self.__class__ clone = cls.__new__(cls) clone.kwargs = dict(self.kwargs) clone.args = list(self.args) clone.group = self.group clone.guessed = set(self.guessed) return clone def __repr__(self) -> str: return F'{self.__class__.__name__}({super().__repr__()})' def __call__(self, init: Callable) -> Callable: parameters = inspect.signature(init).parameters try: inferred = Arg.Infer(parameters[self.destination]) inferred.merge_all(self) init.__annotations__[self.destination] = inferred except KeyError: raise ValueError(F'Unable to decorate because no parameter with name {self.destination} exists.') return initAncestors
Class variables
var deletevar omit
Static methods
def AsOption(value, cls)-
Expand source code Browse git
@staticmethod def AsOption(value: Optional[Any], cls: Enum) -> Enum: if value is None or isinstance(value, cls): return value if isinstance(value, str): try: return cls[value] except KeyError: pass needle = normalize_to_identifier(value).casefold() for item in cls.__members__: if item.casefold() == needle: return cls[item] try: return cls(value) except Exception as E: choices = ', '.join(normalize_to_display(m) for m in cls.__members__) raise ValueError(F'Could not transform {value} into {cls.__name__}; the choices are: {choices}') from E def Delete()-
Expand source code Browse git
@classmethod def Delete(cls): return cls(nargs=cls.delete) def Counts(*args, help=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, group=None)-
A convenience method to add argparse arguments that introduce a counter.
Expand source code Browse git
@classmethod def Counts( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, group : Optional[str] = None, ): """ A convenience method to add argparse arguments that introduce a counter. """ return cls(*args, group=group, help=help, dest=dest, action='count') def Switch(*args, off=False, help=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, group=None)-
A convenience method to add argparse arguments that change a boolean value from True to False or vice versa. By default, a switch will have a False default and change it to True when specified.
Expand source code Browse git
@classmethod def Switch( cls, *args : str, off=False, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, group : Optional[str] = None, ): """ A convenience method to add argparse arguments that change a boolean value from True to False or vice versa. By default, a switch will have a False default and change it to True when specified. """ return cls(*args, group=group, help=help, dest=dest, action='store_false' if off else 'store_true') def Binary(*args, help=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, nargs=refinery.units.Arg.omit, metavar=None, group=None)-
Used to add argparse arguments that contain binary data.
Expand source code Browse git
@classmethod def Binary( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain binary data. """ if metavar is None and any('-' in a for a in args): metavar = 'B' return cls(*args, group=group, help=help, dest=dest, nargs=nargs, type=multibin, metavar=metavar) def String(*args, help=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, nargs=refinery.units.Arg.omit, metavar=None, group=None)-
Used to add argparse arguments that contain string data.
Expand source code Browse git
@classmethod def String( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain string data. """ if metavar is None and any('-' in a for a in args): metavar = 'STR' return cls(*args, group=group, help=help, dest=dest, nargs=nargs, type=str, metavar=metavar) def RegExp(*args, help=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, nargs=refinery.units.Arg.omit, metavar=None, group=None)-
Used to add argparse arguments that contain a regular expression.
Expand source code Browse git
@classmethod def RegExp( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain a regular expression. """ if metavar is None and any('-' in a for a in args): metavar = 'REGEX' return cls(*args, group=group, help=help, dest=dest, nargs=nargs, type=regexp, metavar=metavar) def NumSeq(*args, help=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, nargs=refinery.units.Arg.omit, metavar=None, group=None)-
Used to add argparse arguments that contain a numeric sequence.
Expand source code Browse git
@classmethod def NumSeq( cls, *args : str, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain a numeric sequence. """ return cls(*args, group=group, help=help, nargs=nargs, dest=dest, type=numseq, metavar=metavar) def Bounds(*args, help=None, dest=refinery.units.Arg.omit, nargs=refinery.units.Arg.omit, default=refinery.units.Arg.omit, metavar='start:end:step', group=None)-
Used to add argparse arguments that contain a slice.
Expand source code Browse git
@classmethod def Bounds( cls, *args : str, help : Optional[Union[omit, str]] = None, dest : Union[omit, str] = omit, nargs : Union[omit, int, str] = omit, default : Union[omit, Any] = omit, metavar : Optional[str] = 'start:end:step', group : Optional[str] = None, ): """ Used to add argparse arguments that contain a slice. """ if help is None: help = 'Specify start:end:step in Python slice syntax.' if default is not cls.omit: help = F'{help} The default is {{default}}.' return cls(*args, group=group, help=help, default=default, nargs=nargs, dest=dest, type=sliceobj, metavar=metavar) def Number(*args, bound=refinery.units.Arg.omit, help=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, metavar=None, group=None)-
Used to add argparse arguments that contain a number.
Expand source code Browse git
@classmethod def Number( cls, *args : str, bound : Union[omit, Tuple[int, int]] = omit, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments that contain a number. """ nt = number if bound is not cls.omit: lower, upper = bound nt = nt[lower:upper] return cls(*args, group=group, help=help, dest=dest, type=nt, metavar=metavar or 'N') def Option(*args, choices, help=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, metavar=None, group=None)-
Used to add argparse arguments with a fixed set of options, based on an enumeration.
Expand source code Browse git
@classmethod def Option( cls, *args : str, choices : Enum, help : Union[omit, str] = omit, dest : Union[omit, str] = omit, metavar : Optional[str] = None, group : Optional[str] = None, ): """ Used to add argparse arguments with a fixed set of options, based on an enumeration. """ cnames = [normalize_to_display(c).casefold() for c in choices.__members__] metavar = metavar or choices.__name__ return cls(*args, group=group, help=help, metavar=metavar, dest=dest, choices=cnames, type=str.casefold) def Choice(*args, choices, help=refinery.units.Arg.omit, metavar=refinery.units.Arg.omit, dest=refinery.units.Arg.omit, type=builtins.str, nargs=refinery.units.Arg.omit, group=None)-
Used to add argparse arguments with a fixed set of options, based on a list of strings.
Expand source code Browse git
@classmethod def Choice( cls, *args : str, choices : List[str], help : Union[omit, str] = omit, metavar : Union[omit, str] = omit, dest : Union[omit, str] = omit, type : Type = str, nargs : Union[omit, int, str] = omit, group : Optional[str] = None, ): """ Used to add argparse arguments with a fixed set of options, based on a list of strings. """ return cls(*args, group=group, type=type, metavar=metavar, nargs=nargs, dest=dest, help=help, choices=choices) def Infer(pt, module=None)-
This class method can be used to infer the argparse argument for a Python function parameter. This guess is based on the annotation, name, and default value.
Expand source code Browse git
@classmethod def Infer(cls, pt: inspect.Parameter, module: Optional[str] = None): """ This class method can be used to infer the argparse argument for a Python function parameter. This guess is based on the annotation, name, and default value. """ def needs_type(item: Dict[str, str]): try: return item['action'] == 'store' except KeyError: return True def get_argp_type(annotation_type): if issubclass(annotation_type, (bytes, bytearray, memoryview)): return multibin if issubclass(annotation_type, int): return number if issubclass(annotation_type, slice): return sliceobj return annotation_type name = normalize_to_display(pt.name, False) default = pt.default guessed_pos_args = [] guessed_kwd_args = dict(dest=pt.name) guessed = set() annotation = pt.annotation def guess(key, value): try: return guessed_kwd_args[key] except KeyError: guessed_kwd_args[key] = value guessed.add(key) return value if isinstance(annotation, str): symbols = None while symbols is not False: try: annotation = eval(annotation, symbols) except NameError: if symbols is not None or module is None: break try: import importlib symbols = importlib.import_module(module).__dict__ except Exception: symbols = False except Exception: pass else: break if annotation is not pt.empty: if isinstance(annotation, Arg): if annotation.kwargs.get('dest', pt.name) != pt.name: raise ValueError( F'Incompatible argument destination specified; parameter {pt.name} ' F'was annotated with {annotation!r}.') guessed_pos_args = annotation.args guessed_kwd_args.update(annotation.kwargs) guessed_kwd_args.update(group=annotation.group) elif isinstance(annotation, type): guessed.add('type') if not issubclass(annotation, bool) and needs_type(guessed_kwd_args): guessed_kwd_args.update(type=get_argp_type(annotation)) elif not isinstance(default, bool): raise ValueError('Default value for boolean arguments must be provided.') if not guessed_pos_args: guessed_pos_args = guessed_pos_args or [F'--{name}' if pt.kind is pt.KEYWORD_ONLY else name] if pt.kind is pt.VAR_POSITIONAL: oldnargs = guess('nargs', ZERO_OR_MORE) if oldnargs not in (ONE_OR_MORE, ZERO_OR_MORE, REMAINDER): raise ValueError(F'Variadic positional arguments has nargs set to {oldnargs!r}') return cls(*guessed_pos_args, **guessed_kwd_args) if default is not pt.empty: if isinstance(default, Enum): default = default.name if isinstance(default, (list, tuple)): guess('nargs', ZERO_OR_MORE) if not pt.default: default = pt.empty else: guessed_kwd_args['default'] = pt.default default = default[0] else: guessed_kwd_args['default'] = default if pt.kind is pt.POSITIONAL_ONLY: guess('nargs', OPTIONAL) if default is not pt.empty: if isinstance(default, bool): action = 'store_false' if default else 'store_true' guessed_kwd_args['action'] = action elif needs_type(guessed_kwd_args): guess('type', get_argp_type(type(default))) return cls(*guessed_pos_args, **guessed_kwd_args, guessed=guessed)
Instance variables
var positional-
Expand source code Browse git
@property def positional(self) -> bool: return any(a[0] != '-' for a in self.args) var destination-
The name of the variable where the contents of this parsed argument will be stored.
Expand source code Browse git
@property def destination(self) -> str: """ The name of the variable where the contents of this parsed argument will be stored. """ for a in self.args: if a[0] != '-': return a try: return self.kwargs['dest'] except KeyError: for a in self.args: if a.startswith('--'): dest = normalize_to_identifier(a) if dest.isidentifier(): return dest raise AttributeError(F'The argument with these values has no destination: {self!r}')
Methods
def update_help(self)-
Expand source code Browse git
def update_help(self): if 'help' not in self.kwargs: return class formatting(dict): arg = self def __missing__(self, key): if key == 'choices': return ', '.join(self.arg.kwargs['choices']) if key == 'default': default: Union[bytes, int, str, slice] = self.arg.kwargs['default'] if isinstance(default, (list, tuple, set)): if not default: return 'empty' elif len(default) == 1: default = default[0] if isinstance(default, slice): parts = [default.start or '', default.stop or '', default.step] default = ':'.join(str(x) for x in parts if x is not None) if isinstance(default, int): return default if not isbuffer(default): return default if default.isalnum(): return default.decode('latin-1') return F'H:{default.hex()}' if key == 'varname': return self.arg.kwargs.get('metavar', self.arg.destination) try: help_string: str = self.kwargs['help'] self.kwargs.update( help=help_string.format_map(formatting())) except Exception: pass def merge_args(self, them)-
Expand source code Browse git
def merge_args(self, them: Argument) -> None: def iterboth(): yield from them.args yield from self.args if not self.args: self.args = list(them.args) return sflag = None lflag = None for a in iterboth(): if a[:2] == '--': lflag = lflag or a elif a[0] == '-': sflag = sflag or a self.args = [] if sflag: self.args.append(sflag) if lflag: self.args.append(lflag) if not self.args: self.args = list(them.args) def merge_all(self, them)-
Expand source code Browse git
def merge_all(self, them: Arg) -> None: for key, value in them.kwargs.items(): if value is Arg.delete: self.kwargs.pop(key, None) self.guessed.discard(key) continue if key in them.guessed: if key not in self.guessed: if key == 'type' and self.kwargs.get('action', None) != 'store': continue if key in self.kwargs: continue self.guessed.add(key) self.kwargs[key] = value self.merge_args(them) self.group = them.group or self.group
Inherited members
class ArgumentSpecification (*args, **kwargs)-
A container object that stores
refinery.units.argspecifications.Expand source code Browse git
class ArgumentSpecification(OrderedDict): """ A container object that stores `refinery.units.arg` specifications. """ def merge(self: Dict[str, Arg], argument: Arg): """ Insert or update the specification with the given argument. """ dest = argument.destination if dest in self: self[dest].merge_all(argument) return self[dest] = argumentAncestors
- collections.OrderedDict
- builtins.dict
Methods
def merge(self, argument)-
Insert or update the specification with the given argument.
Expand source code Browse git
def merge(self: Dict[str, Arg], argument: Arg): """ Insert or update the specification with the given argument. """ dest = argument.destination if dest in self: self[dest].merge_all(argument) return self[dest] = argument
class Executable (name, bases, nmspc, abstract=False, extend_docs=False)-
This is the metaclass for refinery units. A class which is of this type is required to implement a method
run(). If the class is created in the currently executing module, then an instance of the class is automatically created after it is defined and itsrun()method is invoked.Expand source code Browse git
class Executable(ABCMeta): """ This is the metaclass for refinery units. A class which is of this type is required to implement a method `run()`. If the class is created in the currently executing module, then an instance of the class is automatically created after it is defined and its `run()` method is invoked. """ Entry = None """ This variable stores the executable entry point. If more than one entry point are present, only the first one is executed and an error message is generated for the other ones. """ _argument_specification: Dict[str, Arg] def _infer_argspec(cls, parameters: Dict[str, inspect.Parameter], args: Optional[Dict[str, Arg]], module: str): args: Dict[str, Arg] = ArgumentSpecification() if args is None else args exposed = [pt.name for pt in skipfirst(parameters.values()) if pt.kind != pt.VAR_KEYWORD] # The arguments are added in reverse order to the argument parser later. # This is done to have a more intuitive use of decorator based argument configuration. exposed.reverse() for name in exposed: try: argument = Arg.Infer(parameters[name], module) except KeyError: continue args.merge(argument) for name in exposed: args.move_to_end(name) for known in args.values(): if known.positional: known.kwargs.pop('dest', None) if 'default' in known.kwargs: known.kwargs.setdefault('nargs', OPTIONAL) elif not any(len(a) > 2 for a in known.args): flagname = normalize_to_display(known.destination, False) known.args.append(F'--{flagname}') action: str = known.kwargs.get('action', 'store') if action.startswith('store_'): known.kwargs.pop('default', None) continue if action == 'store': known.kwargs.setdefault('type', multibin) return args def __new__(mcs, name: str, bases: Sequence[Executable], nmspc: Dict[str, Any], abstract=False, extend_docs=False): def decorate(**decorations): for method, decorator in decorations.items(): try: old = nmspc[method] except KeyError: continue if getattr(old, '__isabstractmethod__', False): continue nmspc[method] = decorator(old) decorate( filter=UnitFilterBoilerplate, process=UnitProcessorBoilerplate, reverse=UnitProcessorBoilerplate, __init__=no_type_check, ) if not abstract and Entry not in bases: bases = bases + (Entry,) if not bases[0].is_reversible: nmspc.setdefault('reverse', MissingFunction) nmspc.setdefault('__doc__', '') return super(Executable, mcs).__new__(mcs, name, bases, nmspc) def __init__(cls, name: str, bases: Sequence[Executable], nmspc: Dict[str, Any], abstract=False, extend_docs=False): super(Executable, cls).__init__(name, bases, nmspc) cls._argument_specification = args = ArgumentSpecification() cls_init = cls.__init__ sig_init = inspect.signature(cls_init) parameters = sig_init.parameters has_keyword = any(p.kind == p.VAR_KEYWORD for p in parameters.values()) inherited = [] for base in bases: base: Executable for key, value in base._argument_specification.items(): if key in parameters: args[key] = value.__copy__() if extend_docs and bases: base_doc = bases[~0].__doc__.rstrip().lstrip('\n') if base_doc: cls.__doc__ = F'{cls.__doc__}\n{base_doc}' if not abstract and bases and has_keyword: for key, value in bases[0]._argument_specification.items(): if key not in args: args[key] = value.__copy__() inherited.append(key) cls._infer_argspec(parameters, args, cls.__module__) if not abstract and has_keyword: cls__init__ = cls.__init__ @wraps(cls__init__) def new__init__(self, *args, **kwargs): cls__init__(self, *args, **kwargs) params = [p for p in parameters.values() if p.kind != p.VAR_KEYWORD] if inherited: pp = inspect.signature(bases[0].__init__).parameters for name in inherited: params.append(pp[name]) new__init__.__signature__ = sig_init.replace(parameters=tuple(params)) cls.__init__ = new__init__ try: initcode = cls.__init__.__code__.co_code except AttributeError: initcode = None if initcode == (lambda: None).__code__.co_code: base = bases[0] head = [] defs = {} tail = None for p in skipfirst(parameters.values()): if p.kind in (p.POSITIONAL_ONLY, p.POSITIONAL_OR_KEYWORD): head.append(p.name) if p.kind in (p.KEYWORD_ONLY, p.POSITIONAL_OR_KEYWORD) and p.default is not p.empty: defs[p.name] = p.default if p.kind is p.VAR_POSITIONAL: tail = p.name @wraps(cls.__init__) def cls__init__(self, *args, **kw): for name, arg in zip(head, args): kw[name] = arg if tail: k = min(len(args), len(head)) kw[tail] = args[k:] for key in defs: if key not in kw: kw[key] = defs[key] base.__init__(self, **kw) cls.__init__ = cls__init__ if not abstract and sys.modules[cls.__module__].__name__ == '__main__': if not Executable.Entry: Executable.Entry = cls.name cls.run() def __getitem__(cls, other): return cls().__getitem__(other) def __or__(cls, other): return cls().__or__(other) def __pos__(cls): return cls() def __neg__(cls): unit: Unit = cls() unit.args.reverse = 1 return unit def __ror__(cls, other) -> Unit: return cls().__ror__(other) @property def is_reversible(cls) -> bool: """ This property is `True` if and only if the unit has a member function named `reverse`. By convention, this member function implements the inverse of `refinery.units.Unit.process`. """ if cls.reverse is MissingFunction: return False try: return not cls.reverse.__isabstractmethod__ except AttributeError: return True @property def codec(cls) -> str: """ The default codec for encoding textual information between units. The value of this property is hardcoded to `UTF8`. """ return 'UTF8' @property def name(cls) -> str: return normalize_to_display(cls.__name__) @property def logger(cls) -> Logger: try: return cls._logger except AttributeError: pass cls._logger = _logger = logger(cls.name) return _loggerAncestors
- abc.ABCMeta
- builtins.type
Subclasses
Class variables
var Entry-
This variable stores the executable entry point. If more than one entry point are present, only the first one is executed and an error message is generated for the other ones.
Instance variables
var is_reversible-
This property is
Trueif and only if the unit has a member function namedreverse. By convention, this member function implements the inverse ofUnit.process().Expand source code Browse git
@property def is_reversible(cls) -> bool: """ This property is `True` if and only if the unit has a member function named `reverse`. By convention, this member function implements the inverse of `refinery.units.Unit.process`. """ if cls.reverse is MissingFunction: return False try: return not cls.reverse.__isabstractmethod__ except AttributeError: return True var codec-
The default codec for encoding textual information between units. The value of this property is hardcoded to
UTF8.Expand source code Browse git
@property def codec(cls) -> str: """ The default codec for encoding textual information between units. The value of this property is hardcoded to `UTF8`. """ return 'UTF8' var name-
Expand source code Browse git
@property def name(cls) -> str: return normalize_to_display(cls.__name__) var logger-
Expand source code Browse git
@property def logger(cls) -> Logger: try: return cls._logger except AttributeError: pass cls._logger = _logger = logger(cls.name) return _logger
class DelayedArgumentProxy (argv, argo)-
This class implements a proxy for the
argsmember variable ofUnit. Its primary purpose is to proxyDelayedArgumentvalues which can be computed only as soon as input data becomes available and which also have to be recomputed for each input.Expand source code Browse git
class DelayedArgumentProxy: """ This class implements a proxy for the `args` member variable of `refinery.units.Unit`. Its primary purpose is to proxy `refinery.lib.argformats.DelayedArgument` values which can be computed only as soon as input data becomes available and which also have to be recomputed for each input. """ _argv: Namespace _argo: List[str] _args: Dict[str, Any] _done: bool _guid: int _lock: Lock def __copy__(self): cls = self.__class__ clone = cls.__new__(cls) clone._store( _lock=Lock(), _argv=self._argv, _argo=list(self._argo), _args=dict(self._args), _done=self._done, _guid=self._guid, ) return clone def __iter__(self): yield from self._args def __getitem__(self, key): return self._args[key] def __init__(self, argv: Namespace, argo: Iterable[str]): args = {} done = True for name, value in vars(argv).items(): if not pending(value): args[name] = value else: done = False self._store( _lock=Lock(), _argv=argv, _argo=list(argo), _args=args, _done=done, _guid=None, ) def __call__(self, data: bytearray): """ Update the current arguments for the input `data`, regardless of whether or not this chunk has already been used. In most cases, the matrix-multiplication syntax should be used instead of this direct call: If a multibin argument modifies the meta dictionary by being applied, a second interpretation of this argument with the same chunk might cause an error. For example, if an argument specifies to pop a meta variable from the meta dictionary, this variable will not be available for a second interpretation call. """ for name in self._argo: if self._lock.locked(): raise RuntimeError(F'Attempting to resolve {name} while an update for this argument is in flight') with self._lock: value = getattr(self._argv, name, None) if value and pending(value): self._args[name] = manifest(value, data) self._store(_guid=id(data)) return data def __matmul__(self, data: bytearray): """ Interpret the current arguments for the given input `data`. """ if self._done: return data if not isinstance(data, bytearray): data = bytearray(data) if id(data) == self._guid: return data return self(data) def _store(self, **kwargs): self.__dict__.update(kwargs) def __getattr__(self, name): try: return super().__getattr__(name) except AttributeError: pass try: return self._args[name] except KeyError: pass try: value = getattr(self._argv, name) except AttributeError as E: raise AttributeError(F'Argument {name} not set.') from E if not value or not pending(value): return value raise AttributeError(F'the value {name} cannot be accessed until data is available.') def __setattr__(self, name, value): if not hasattr(self._argv, name): self._argo.append(name) if pending(value): self._store(_done=False) else: self._args[name] = value return setattr(self._argv, name, value) class UnitBase-
This base class is an abstract interface specifying the abstract methods that have to be present on any unit. All actual units should inherit from its only child class
Unit.Expand source code Browse git
class UnitBase(metaclass=Executable, abstract=True): """ This base class is an abstract interface specifying the abstract methods that have to be present on any unit. All actual units should inherit from its only child class `refinery.units.Unit`. """ @abc.abstractmethod def process(self, data: ByteString) -> Union[Optional[ByteString], Iterable[ByteString]]: """ This routine is overridden by children of `refinery.units.Unit` to define how the unit processes a given chunk of binary data. """ @abc.abstractmethod def reverse(self, data: ByteString) -> Union[Optional[ByteString], Iterable[ByteString]]: """ If this routine is overridden by children of `refinery.units.Unit`, then it must implement an operation that reverses the `refinery.units.Unit.process` operation. The absence of an overload for this function is ignored for non-abstract children of `refinery.units.UnitBase`. """ @abc.abstractclassmethod def handles(self, data: ByteString) -> Optional[bool]: """ This tri-state routine returns `True` if the unit is certain that it can process the given input data, and `False` if it is convinced of the opposite. `None` is returned when no clear verdict is available. """ @abc.abstractmethod def filter(self, inputs: Iterable[Chunk]) -> Iterable[Chunk]: """ Receives an iterable of `refinery.lib.frame.Chunk`s and yields only those that should be processed. The default implementation returns the iterator without change; this member function is designed to be overloaded by child classes of `refinery.units.Unit` to allow inspection of an entire frame layer and altering it before `refinery.units.Unit.process` is called on the individual chunks. """ @abc.abstractmethod def finish(self) -> Iterable[Chunk]: """ Child classes of `refinery.units.Unit` can overwrite this method to generate a stream of chunks to be processed after the last frame has been processed. """Subclasses
Static methods
def handles(data)-
This tri-state routine returns
Trueif the unit is certain that it can process the given input data, andFalseif it is convinced of the opposite.Noneis returned when no clear verdict is available.Expand source code Browse git
@abc.abstractclassmethod def handles(self, data: ByteString) -> Optional[bool]: """ This tri-state routine returns `True` if the unit is certain that it can process the given input data, and `False` if it is convinced of the opposite. `None` is returned when no clear verdict is available. """
Methods
def process(self, data)-
This routine is overridden by children of
Unitto define how the unit processes a given chunk of binary data.Expand source code Browse git
@abc.abstractmethod def process(self, data: ByteString) -> Union[Optional[ByteString], Iterable[ByteString]]: """ This routine is overridden by children of `refinery.units.Unit` to define how the unit processes a given chunk of binary data. """ def reverse(self, data)-
If this routine is overridden by children of
Unit, then it must implement an operation that reverses theUnit.process()operation. The absence of an overload for this function is ignored for non-abstract children ofUnitBase.Expand source code Browse git
@abc.abstractmethod def reverse(self, data: ByteString) -> Union[Optional[ByteString], Iterable[ByteString]]: """ If this routine is overridden by children of `refinery.units.Unit`, then it must implement an operation that reverses the `refinery.units.Unit.process` operation. The absence of an overload for this function is ignored for non-abstract children of `refinery.units.UnitBase`. """ def filter(self, inputs)-
Receives an iterable of
Chunks and yields only those that should be processed. The default implementation returns the iterator without change; this member function is designed to be overloaded by child classes ofUnitto allow inspection of an entire frame layer and altering it beforeUnit.process()is called on the individual chunks.Expand source code Browse git
@abc.abstractmethod def filter(self, inputs: Iterable[Chunk]) -> Iterable[Chunk]: """ Receives an iterable of `refinery.lib.frame.Chunk`s and yields only those that should be processed. The default implementation returns the iterator without change; this member function is designed to be overloaded by child classes of `refinery.units.Unit` to allow inspection of an entire frame layer and altering it before `refinery.units.Unit.process` is called on the individual chunks. """ def finish(self)-
Child classes of
Unitcan overwrite this method to generate a stream of chunks to be processed after the last frame has been processed.Expand source code Browse git
@abc.abstractmethod def finish(self) -> Iterable[Chunk]: """ Child classes of `refinery.units.Unit` can overwrite this method to generate a stream of chunks to be processed after the last frame has been processed. """
class requirement (*args, **kwargs)-
Property attribute.
fget function to be used for getting an attribute value fset function to be used for setting an attribute value fdel function to be used for del'ing an attribute doc docstring
Typical use is to define a managed attribute x:
class C(object): def getx(self): return self._x def setx(self, value): self._x = value def delx(self): del self._x x = property(getx, setx, delx, "I'm the 'x' property.")
Decorators make defining new properties or modifying existing ones easy:
class C(object): @property def x(self): "I am the 'x' property." return self._x @x.setter def x(self, value): self._x = value @x.deleter def x(self): del self._x
Expand source code Browse git
class requirement(property): passAncestors
- builtins.property
Subclasses
- refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement - refinery.units.Unit.Requires.
.Requirement
class Unit (**keywords)-
The base class for all refinery units. It implements a small set of globally available options and the handling for multiple inputs and outputs. All units implement the framing syntax for producing multiple outputs and ingesting multiple inputs in a common format. For more details, see
refinery.lib.frame.Expand source code Browse git
class Unit(UnitBase, abstract=True): """ The base class for all refinery units. It implements a small set of globally available options and the handling for multiple inputs and outputs. All units implement the _framing_ syntax for producing multiple outputs and ingesting multiple inputs in a common format. For more details, see `refinery.lib.frame`. """ Arg = Arg required_dependencies: Optional[Set[str]] = None optional_dependencies: Optional[Dict[str, Set[str]]] = None @staticmethod def Requires(distribution: str, *_buckets: str): class Requirement(requirement): dependency: ClassVar[str] = distribution required: ClassVar[bool] = not _buckets def __init__(self, importer: Callable): super().__init__(importer) self.module = None def __set_name__(self, unit: Type[Unit], name: str): if self.required: bucket = unit.required_dependencies if bucket is None: unit.required_dependencies = bucket = set() buckets = [bucket] else: optmap = unit.optional_dependencies if optmap is None: unit.optional_dependencies = optmap = {} buckets = [optmap.setdefault(name, set()) for name in _buckets] for bucket in buckets: bucket.add(self.dependency) def __get__(self, unit: Optional[Type[Unit]], tp: Optional[Type[Executable]] = None): if self.module is not None: return self.module try: self.module = module = self.fget() except ImportError as E: deps = unit.optional_dependencies or {} args = set() for v in deps.values(): args.update(v) raise RefineryImportMissing(self.dependency, *args) from E except Exception as E: raise AttributeError(F'module import for distribution "{distribution}" failed: {E!s}') else: return module return Requirement @property def is_reversible(self) -> bool: return self.__class__.is_reversible @property def codec(self) -> str: return self.__class__.codec @property def logger(self): logger: Logger = self.__class__.logger return logger @property def name(self) -> str: return self.__class__.name @property def is_quiet(self) -> bool: try: return self.args.quiet except AttributeError: return False @property def log_level(self) -> LogLevel: """ Returns the current log level as an element of `refinery.units.LogLevel`. """ if self.is_quiet: return LogLevel.NONE return LogLevel(self.logger.getEffectiveLevel()) @log_level.setter def log_level(self, value: Union[int, LogLevel]) -> None: if not isinstance(value, LogLevel): value = LogLevel.FromVerbosity(value) self.logger.setLevel(value) def log_detach(self) -> None: """ When a unit is created using the `refinery.units.Unit.assemble` method, it is attached to a logger by default (in less abstract terms, the `refinery.units.Unit.log_level` property is set to a positive value). This method detaches the unit from its logger, which also means that any exceptions that occur during runtime will be raised to the caller. """ self.log_level = LogLevel.DETACHED return self def __iter__(self) -> Generator[Chunk, None, None]: return self @property def leniency(self) -> int: return getattr(self.args, 'lenient', 0) def _exception_handler(self, exception: BaseException, data: Optional[ByteString]): if data is not None and self.leniency > 1: try: return exception.partial except AttributeError: return data if isinstance(exception, RefineryPartialResult): if self.leniency >= 1: return exception.partial if self.log_level < LogLevel.DETACHED: self.log_warn(F'error, partial result returned: {exception}') return None raise exception elif self.log_level >= LogLevel.DETACHED: raise exception elif isinstance(exception, RefineryCriticalException): self.log_warn(F'critical error, terminating: {exception}') raise exception elif isinstance(exception, VariableMissing): self.log_warn('critical error:', exception.args[0]) elif isinstance(exception, GeneratorExit): raise exception elif isinstance(exception, RefineryImportMissing): self.log_fail(F'dependency {exception.missing} is missing; run pip install {exception.install}') elif isinstance(exception, RefineryException): self.log_fail(exception.args[0]) else: try: explanation = exception.args[0] except (AttributeError, IndexError): explanation = exception if not isinstance(explanation, str): explanation = exception explanation = str(explanation).strip() message = F'exception of type {exception.__class__.__name__}' if explanation: message = F'{message}; {explanation!s}' if self.log_level <= LogLevel.INFO and data is not None: from refinery.units.sinks.peek import peek peeked = str(data | peek(lines=2, decode=True, stdout=True)) message = F'{message}\n{peeked}' self.log_fail(message) if self.log_debug(): import traceback traceback.print_exc(file=sys.stderr) def __next__(self) -> Chunk: if not self._chunks: self._chunks = iter(self._framehandler) while True: try: return next(self._chunks) except StopIteration: raise except RefineryCriticalException as R: raise StopIteration from R except BaseException as B: self._exception_handler(B, None) raise StopIteration from B @property def _framehandler(self) -> Framed: if self._framed: return self._framed def normalized_action(data: ByteString) -> Generator[Chunk, None, None]: try: result = self.act(data) if inspect.isgenerator(result): yield from (x for x in result if x is not None) elif result is not None: yield result except KeyboardInterrupt: raise except BaseException as B: result = self._exception_handler(B, data) message = str(B).strip() or 'unknown' if result is not None: yield self.labelled(result, error=message) self._framed = Framed( normalized_action, self.source, self.args.nesting, self.args.squeeze, self.filter, self.finish, ) return self._framed def finish(self) -> Iterable[Chunk]: yield from () def filter(self, inputs: Iterable[Chunk]) -> Iterable[Chunk]: return inputs @classmethod def handles(self, data: bytearray) -> Optional[bool]: return None def reset(self): try: self._source.reset() except AttributeError: pass self._framed = None self._chunks = None @property def source(self): """ Represents a unit or binary IO stream which has been attached to this unit as its source of input data. """ return self._source @source.setter def source(self, stream): if isinstance(stream, self.__class__.__class__): stream = stream() if not isinstance(stream, self.__class__): self.reset() self._source = stream @property def nozzle(self) -> Unit: """ The nozzle is defined recursively as the nozzle of `refinery.units.Unit.source` and `self` if no such thing exists. In other words, it is the leftmost unit in a pipeline, where data should be inserted for processing. """ try: return self.source.nozzle except AttributeError: return self def __getitem__(self, unit: Union[Unit, Type[Unit], slice]): if isinstance(unit, type): unit = unit() alpha = self.__copy__() if isinstance(unit, slice): if unit.start or unit.stop or unit.step: raise ValueError alpha.args.squeeze = True return alpha omega = unit.__copy__() alpha.args.nesting += 1 omega.args.nesting -= 1 omega.nozzle.source = alpha return omega def __pos__(self): return self def __del__(self): try: self.nozzle.source.close() except Exception: pass def __neg__(self) -> Unit: pipeline = [] cursor = self while isinstance(cursor, Unit): reversed = copy.copy(cursor) reversed.args.reverse = 1 reversed._source = None reversed.reset() pipeline.append(reversed) cursor = cursor._source reversed = None while pipeline: reversed = reversed | pipeline.pop() return reversed def __ror__(self, stream: Union[str, ByteIO, ByteString]): if stream is None: return self if not isstream(stream): if isinstance(stream, str): stream = stream.encode(self.codec) stream = MemoryFile(stream) if stream else open(os.devnull, 'rb') self.reset() self.nozzle.source = stream return self def __str__(self): return self | str def __bytes__(self): return self | bytes @overload def __or__(self, stream: Callable[[ByteString], _T]) -> _T: ... @overload def __or__(self, stream: Union[Unit, Type[Unit]]) -> Unit: ... @overload def __or__(self, stream: dict) -> dict: ... @overload def __or__(self, stream: list) -> list: ... @overload def __or__(self, stream: set) -> set: ... @overload def __or__(self, stream: bytearray) -> bytearray: ... @overload def __or__(self, stream: memoryview) -> memoryview: ... @overload def __or__(self, stream: Type[None]) -> None: ... @overload def __or__(self, stream: Type[bytearray]) -> bytearray: ... @overload def __or__(self, stream: ByteIO) -> ByteIO: ... def __or__(self, stream): def get_converter(it: Iterable): try: c = one(it) except LookupError: return None if ... is c: def identity(x): return x return identity if callable(c): return c if stream is None: with open(os.devnull, 'wb') as null: self | null return if isinstance(stream, type) and issubclass(stream, Entry): stream = stream() if isinstance(stream, type(...)): def stream(c): return c if isinstance(stream, Entry): return stream.__copy__().__ror__(self) elif isinstance(stream, list): converter = get_converter(stream) if converter is None: stream.extend(self) return stream return [converter(chunk) for chunk in self] elif isinstance(stream, set): converter = get_converter(stream) if converter is None: stream.update(self) return stream return {converter(chunk) for chunk in self} elif isinstance(stream, dict): key, convert = one(stream.items()) output: Dict[Any, Union[List[Chunk], Set[Chunk]]] = {} deconflict = None if isinstance(convert, (list, set)): deconflict = type(convert) convert = one(convert) for item in self: try: value = item.meta[key] except KeyError: value = None if convert is not ...: item = convert(item) if deconflict: bag = output.setdefault(value, deconflict()) if isinstance(bag, list): bag.append(item) else: bag.add(item) else: output[value] = item return output elif isinstance(stream, (bytearray, memoryview)): with MemoryFile(stream) as stdout: return (self | stdout).getvalue() elif callable(stream): with MemoryFile(bytearray()) as stdout: self | stdout out: bytearray = stdout.getbuffer() if isinstance(stream, type) and isinstance(out, stream): return out if isinstance(stream, type) and issubclass(stream, str): out = out.decode(self.codec) return stream(out) stream: ByteIO if not stream.writable(): raise ValueError('target stream is not writable') self._target = stream def cname(x: str): return x.lower().replace('-', '') recode = self.isatty and cname(self.codec) != cname(sys.stdout.encoding) chunk = None for last, chunk in lookahead(self): if ( not last and self._framehandler.framebreak and not chunk.endswith(B'\n') ): chunk.extend(B'\n') if recode: try: chunk = chunk.decode(chunk, self.codec, errors='backslashreplace').encode(sys.stdout.encoding) except Exception: pass try: stream.write(chunk) stream.flush() except AttributeError: pass except (BrokenPipeError, OSError) as E: if isinstance(E, BrokenPipeError) or E.errno != 32: # This happens when the next unit does not consume everything # we send. For example, this can happen when a large file is # read in chunks and the pick unit is used to select only the # first few of these. self.log_debug(F'cannot send to next unit: {E}') break try: if self.isatty and chunk and not chunk.endswith(B'\n'): stream.write(B'\n') stream.flush() except (NameError, AttributeError): pass return stream def read(self, bytecount: int = -1) -> bytes: """ Reads bytes from the output stream of this unit. """ if not bytecount or bytecount < 0: return self.read1() bfr = bytearray(bytecount) offset = 0 while offset < bytecount: tmp = self.read1(bytecount - offset) if not tmp: del bfr[offset:] break end = offset + len(tmp) bfr[offset:end] = tmp offset = end return bytes(bfr) def read1(self, bytecount: int = -1) -> bytes: """ Performs a single read against the output stream of this unit and returns the result. """ try: out = self._buffer or next(self) if bytecount and bytecount > 0: out, self._buffer = out[:bytecount], out[bytecount:] elif self._buffer: self._buffer = B'' return out except StopIteration: return B'' def act(self, data: Union[Chunk, ByteString]) -> Union[Optional[ByteString], Generator[ByteString, None, None]]: mode = self.args.reverse data = self.args @ data if not mode: return self.process(data) elif mode % 2: return self.reverse(data) else: return self.reverse(self.process(data)) def __call__(self, data: Optional[Union[ByteString, Chunk]] = None) -> bytes: with MemoryFile(data) if data else open(os.devnull, 'rb') as stdin: stdin: ByteIO with MemoryFile() as stdout: return (stdin | self | stdout).getvalue() @classmethod def labelled(cls, data: Union[Chunk, ByteString], **meta) -> Chunk: """ This class method can be used to label a chunk of binary output with metadata. This metadata will be visible inside pipeline frames, see `refinery.lib.frame`. """ if isinstance(data, Chunk): data.meta.update(meta) return data return Chunk(data, meta=meta) def process(self, data: ByteString) -> Union[Optional[ByteString], Generator[ByteString, None, None]]: return data @classmethod def log_fail(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool: """ Log the message if and only if the current log level is at least `refinery.units.LogLevel.ERROR`. """ rv = cls.logger.isEnabledFor(LogLevel.ERROR) if rv and messages: cls.logger.error(cls._output(*messages, clip=clip)) return rv @classmethod def log_warn(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool: """ Log the message if and only if the current log level is at least `refinery.units.LogLevel.WARN`. """ rv = cls.logger.isEnabledFor(LogLevel.WARNING) if rv and messages: cls.logger.warning(cls._output(*messages, clip=clip)) return rv @classmethod def log_info(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool: """ Log the message if and only if the current log level is at least `refinery.units.LogLevel.INFO`. """ rv = cls.logger.isEnabledFor(LogLevel.INFO) if rv and messages: cls.logger.info(cls._output(*messages, clip=clip)) return rv @classmethod def log_debug(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool: """ Log the pmessage if and only if the current log level is at least `refinery.units.LogLevel.DEBUG`. """ rv = cls.logger.isEnabledFor(LogLevel.DEBUG) if rv and messages: cls.logger.debug(cls._output(*messages, clip=clip)) return rv @property def isatty(self) -> bool: try: return self._target.isatty() except AttributeError: return False @classmethod def _output(cls, *messages, clip=False) -> str: def transform(message): if callable(message): message = message() if isinstance(message, Exception): args = [arg for arg in message.args if isinstance(arg, str)] if len(args) == 1: message = args[0] else: message = str(message) if isinstance(message, str): return message if isbuffer(message): import codecs message: Union[bytes, bytearray, memoryview] pmsg: str = codecs.decode(message, cls.codec, 'surrogateescape') if not pmsg.isprintable(): pmsg = message.hex().upper() return pmsg else: import pprint return pprint.pformat(message) message = ' '.join(transform(msg) for msg in messages) if clip: from refinery.lib.tools import get_terminal_size length = get_terminal_size(75) - len(cls.name) - 27 message = message[:length] + "..." return message @classmethod def _interface(cls, argp: ArgumentParserWithKeywordHooks) -> ArgumentParserWithKeywordHooks: """ Receives a reference to an argument parser. This parser will be used to parse the command line for this unit into the member variable called `args`. """ base = argp.add_argument_group('generic options') base.set_defaults(reverse=False, squeeze=False) base.add_argument('-h', '--help', action='help', help='Show this help message and exit.') base.add_argument('-L', '--lenient', action='count', default=0, help='Allow partial results as output.') base.add_argument('-Q', '--quiet', action='store_true', help='Disables all log output.') base.add_argument('-0', '--devnull', action='store_true', help='Do not produce any output.') base.add_argument('-v', '--verbose', action='count', default=0, help='Specify up to two times to increase log level.') if cls.is_reversible: base.add_argument('-R', '--reverse', action='count', default=0, help='Use the reverse operation; Specify twice to normalize (first decode, then encode).') groups = {None: argp} for argument in reversed(cls._argument_specification.values()): gp = argument.group if gp not in groups: groups[gp] = argp.add_mutually_exclusive_group() try: groups[gp].add_argument @ argument except Exception: raise RefineryCriticalException(F'Failed to queue argument: {argument!s}') return argp @classmethod def argparser(cls, **keywords): argp = ArgumentParserWithKeywordHooks( keywords, prog=cls.name, description=documentation(cls), add_help=False) argp.set_defaults(nesting=0) return cls._interface(argp) @staticmethod def superinit(spc, **keywords): """ This function uses `refinery.lib.tools.autoinvoke` to call the `__init__` function of `super` with by taking all required parameters from `keywords`, ignoring the rest. Calling ``` self.superinit(super(), **vars()) ``` will therefore perform initialization of the parent class without having to forward all parameters manually. This is a convenience feature which reduces code bloat when many parameters have to be forwarded, see e.g. `refinery.units.pattern.carve.carve` for an example. """ my_own_args = iter(inspect.signature(spc.__thisclass__.__init__).parameters.values()) parent_args = inspect.signature(spc.__init__).parameters keywords.pop(next(my_own_args).name, None) for a in my_own_args: if a.kind is a.VAR_KEYWORD: keywords.update(keywords.pop(a.name, {})) junk = [a for a in keywords] for a in parent_args.values(): if a.kind is a.VAR_KEYWORD: junk = [j for j in junk if j.startswith('_')] break try: junk.remove(a.name) except ValueError: pass for j in junk: del keywords[j] try: if spc.__init__.__func__ is Unit.__init__: return spc.__init__(**keywords) except AttributeError: pass return autoinvoke(spc.__init__, keywords) @classmethod def assemble(cls, *args, **keywords): """ Creates a unit from the given arguments and keywords. The given keywords are used to overwrite any previously specified defaults for the argument parser of the unit, then this modified parser is used to parse the given list of arguments as though they were given on the command line. The parser results are used to construct an instance of the unit, this object is consequently returned. """ argp = cls.argparser(**keywords) args = argp.parse_args_with_nesting(args) try: unit = autoinvoke(cls, args.__dict__) except ValueError as E: argp.error(str(E)) else: unit.args._store(_argo=argp.order) unit.args.quiet = args.quiet unit.args.lenient = args.lenient unit.args.squeeze = args.squeeze unit.args.nesting = args.nesting unit.args.reverse = args.reverse unit.args.devnull = args.devnull unit.args.verbose = args.verbose if args.quiet: unit.log_level = LogLevel.NONE else: unit.log_level = args.verbose return unit def __copy__(self): cls = self.__class__ clone: Unit = cls.__new__(cls) clone.__dict__.update(self.__dict__) # TODO: Preferably, units should keep all their information in args, making # the above __dict__ update unnecessary. # clone._buffer = self._buffer # clone._source = self._source clone._target = None clone._framed = None clone._chunks = None clone.args = copy.copy(self.args) return clone def __init__(self, **keywords): self._buffer = B'' self._source = None self._target = None self._framed = None self._chunks = None keywords.update(dict( nesting=0, reverse=False, squeeze=False, devnull=False, quiet=False, )) # Since Python 3.6, functions always preserve the order of the keyword # arguments passed to them (see PEP 468). self.args = DelayedArgumentProxy(Namespace(**keywords), list(keywords)) self.log_detach() _SECRET_DEBUG_TIMING_FLAG = '--debug-timing' _SECRET_DEBUG_TRACES_FLAG = '--debug-traces' _SECRET_YAPPI_TIMING_FLAG = '--yappi-timing' @classmethod def run(cls: Union[Type[Unit], Executable], argv=None, stream=None) -> None: """ Implements command line execution. As `refinery.units.Unit` is an `refinery.units.Executable`, this method will be executed when a class inheriting from `refinery.units.Unit` is defined in the current `__main__` module. """ if not environment.disable_ps1_bandaid.value: from refinery.lib import powershell ps1 = powershell.bandaid(cls.codec) else: ps1 = None try: sys.set_int_max_str_digits(0) except AttributeError: pass argv = argv if argv is not None else sys.argv[1:] clock = None yappi = None trace = False if cls._SECRET_DEBUG_TRACES_FLAG in argv: trace = True argv.remove(cls._SECRET_DEBUG_TRACES_FLAG) if cls._SECRET_DEBUG_TIMING_FLAG in argv: from time import process_time argv.remove(cls._SECRET_DEBUG_TIMING_FLAG) clock = process_time() cls.logger.setLevel(LogLevel.INFO) cls.logger.info('starting clock: {:.4f}'.format(clock)) if cls._SECRET_YAPPI_TIMING_FLAG in argv: argv.remove(cls._SECRET_YAPPI_TIMING_FLAG) try: import yappi as _yappi except ImportError: cls.logger.warn('unable to start yappi; package is missing') else: yappi = _yappi if stream is None: stream = open(os.devnull, 'rb') if sys.stdin.isatty() else sys.stdin.buffer with stream as source: try: unit = cls.assemble(*argv) except ArgparseError as ap: ap.parser.error_commandline(str(ap)) return except Exception as msg: if not trace: cls.logger.critical(cls._output('initialization failed:', msg)) else: from traceback import format_exc for line in format_exc().splitlines(keepends=False): cls.logger.critical(cls._output(line)) return if ps1: unit.log_debug(F'applying PowerShell band-aid for: {unit.name}') loglevel = environment.verbosity.value if loglevel: unit.log_level = loglevel if clock: unit.log_level = min(unit.log_level, LogLevel.INFO) unit.logger.info('unit launching: {:.4f}'.format(clock)) if yappi is not None: yappi.set_clock_type('cpu') yappi.start() try: with open(os.devnull, 'wb') if unit.args.devnull else sys.stdout.buffer as output: source | unit | output except ParserVariableMissing as E: unit.logger.error(F'the variable "{E!s}" was missing while trying to parse an expression') except ArgumentTypeError as E: unit.logger.error(F'delayed argument initialization failed: {E!s}') except KeyboardInterrupt: unit.logger.warning('aborting due to keyboard interrupt') except OSError: pass if yappi is not None: stats = yappi.get_func_stats() filename = F'{unit.name}.perf' stats.save(filename, type='CALLGRIND') cls.logger.info(F'wrote yappi results to file: {filename}') if clock: stop_clock = process_time() unit.logger.info('stopping clock: {:.4f}'.format(stop_clock)) unit.logger.info('time delta was: {:.4f}'.format(stop_clock - clock))Ancestors
Subclasses
- BlockTransformationBase
- aplib
- blz
- bz2
- decompress
- jcalg
- lzma
- lz4
- lzf
- lzg
- lzip
- lzjb
- lznt1
- lzo
- lzw
- mscf
- NRVUnit
- qlz
- szdd
- zl
- zstd
- CipherUnit
- fernet
- rncrypt
- rot
- rsa
- rsakey
- secstr
- vigenere
- HashUnit
- KeyDerivation
- kblob
- atbash
- b32
- b64
- b85
- base
- cp1252
- esc
- hex
- htmlesc
- netbios
- ps1str
- recode
- u16
- url
- uuenc
- wshenc
- PathExtractorUnit
- xtmagtape
- bat
- csv
- dsphp
- dexstr
- evtx
- opc
- vaddr
- vmemref
- vsnip
- vstack
- httpresponse
- ifps
- ifpsstr
- dsjava
- jvstr
- xj0
- xjl
- lnk
- machometa
- msgpack
- doctxt
- officecrypt
- vbapc
- xlmdeobf
- xlxtr
- pcap
- pcap_http
- OverlayUnit
- JSONEncoderUnit
- dnblob
- dncfx
- dnstr
- pemeta
- pesig
- pkcs7
- pkcs7sig
- stego
- tnetmtm
- n40
- ConditionalUnit
- FrameSlicer
- chop
- cm
- cull
- dedup
- eat
- ef
- emit
- group
- groupby
- max_
- min_
- mvg
- pad
- pick
- pop
- push
- put
- QueueUnit
- reduce
- rmv
- sep
- sorted
- swap
- transpose
- xfcc
- couple
- datefix
- drp
- nop
- urlfix
- xkey
- Deobfuscator
- deob_vba_chr_literals
- PatternExtractorBase
- RegexUnit
- carve_7z
- carve_json
- carve_lnk
- carve_rtf
- carve_xml
- carve_zip
- defang
- mimewords
- struct
- subfiles
- urlguards
- HexViewer
- dump
- iemap
- ppjscript
- ppjson
- ppxml
- bruteforce
- cca
- ccp
- cfmt
- clower
- cswap
- cupper
- ngrams
- rep
- repl
- snip
- stretch
- termfit
- trim
Class variables
var Arg-
This class is specifically an argument for the
add_argumentmethod of anArgumentParserfrom theargparsemodule. It can also be used as a decorator or annotation for the constructor of a refinery unit to better control the argument parser of that unit's command line interface. Example:class prefixer(Unit): def __init__( self, prefix: Arg.Binary(help='This data will be prepended to the input.') ): ... def process(self, data): return self.args.prefix + dataNote that when the init of a unit has a return annotation that is a base class of itself, then all its parameters will automatically be forwarded to that base class.
var required_dependenciesvar optional_dependenciesvar is_reversible-
This property is
Trueif and only if the unit has a member function namedreverse. By convention, this member function implements the inverse ofUnit.process(). var codec-
The default codec for encoding textual information between units. The value of this property is hardcoded to
UTF8. var loggervar name
Static methods
def Requires(distribution, *_buckets)-
Expand source code Browse git
@staticmethod def Requires(distribution: str, *_buckets: str): class Requirement(requirement): dependency: ClassVar[str] = distribution required: ClassVar[bool] = not _buckets def __init__(self, importer: Callable): super().__init__(importer) self.module = None def __set_name__(self, unit: Type[Unit], name: str): if self.required: bucket = unit.required_dependencies if bucket is None: unit.required_dependencies = bucket = set() buckets = [bucket] else: optmap = unit.optional_dependencies if optmap is None: unit.optional_dependencies = optmap = {} buckets = [optmap.setdefault(name, set()) for name in _buckets] for bucket in buckets: bucket.add(self.dependency) def __get__(self, unit: Optional[Type[Unit]], tp: Optional[Type[Executable]] = None): if self.module is not None: return self.module try: self.module = module = self.fget() except ImportError as E: deps = unit.optional_dependencies or {} args = set() for v in deps.values(): args.update(v) raise RefineryImportMissing(self.dependency, *args) from E except Exception as E: raise AttributeError(F'module import for distribution "{distribution}" failed: {E!s}') else: return module return Requirement def labelled(data, **meta)-
This class method can be used to label a chunk of binary output with metadata. This metadata will be visible inside pipeline frames, see
refinery.lib.frame.Expand source code Browse git
@classmethod def labelled(cls, data: Union[Chunk, ByteString], **meta) -> Chunk: """ This class method can be used to label a chunk of binary output with metadata. This metadata will be visible inside pipeline frames, see `refinery.lib.frame`. """ if isinstance(data, Chunk): data.meta.update(meta) return data return Chunk(data, meta=meta) def log_fail(*messages, clip=False)-
Log the message if and only if the current log level is at least
refinery.units.LogLevel.ERROR.Expand source code Browse git
@classmethod def log_fail(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool: """ Log the message if and only if the current log level is at least `refinery.units.LogLevel.ERROR`. """ rv = cls.logger.isEnabledFor(LogLevel.ERROR) if rv and messages: cls.logger.error(cls._output(*messages, clip=clip)) return rv def log_warn(*messages, clip=False)-
Log the message if and only if the current log level is at least
refinery.units.LogLevel.WARN.Expand source code Browse git
@classmethod def log_warn(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool: """ Log the message if and only if the current log level is at least `refinery.units.LogLevel.WARN`. """ rv = cls.logger.isEnabledFor(LogLevel.WARNING) if rv and messages: cls.logger.warning(cls._output(*messages, clip=clip)) return rv def log_info(*messages, clip=False)-
Log the message if and only if the current log level is at least
refinery.units.LogLevel.INFO.Expand source code Browse git
@classmethod def log_info(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool: """ Log the message if and only if the current log level is at least `refinery.units.LogLevel.INFO`. """ rv = cls.logger.isEnabledFor(LogLevel.INFO) if rv and messages: cls.logger.info(cls._output(*messages, clip=clip)) return rv def log_debug(*messages, clip=False)-
Log the pmessage if and only if the current log level is at least
refinery.units.LogLevel.DEBUG.Expand source code Browse git
@classmethod def log_debug(cls: Union[Executable, Type[Unit]], *messages, clip=False) -> bool: """ Log the pmessage if and only if the current log level is at least `refinery.units.LogLevel.DEBUG`. """ rv = cls.logger.isEnabledFor(LogLevel.DEBUG) if rv and messages: cls.logger.debug(cls._output(*messages, clip=clip)) return rv def argparser(**keywords)-
Expand source code Browse git
@classmethod def argparser(cls, **keywords): argp = ArgumentParserWithKeywordHooks( keywords, prog=cls.name, description=documentation(cls), add_help=False) argp.set_defaults(nesting=0) return cls._interface(argp) def superinit(spc, **keywords)-
This function uses
autoinvoke()to call the__init__function ofsuperwith by taking all required parameters fromkeywords, ignoring the rest. Callingself.superinit(super(), **vars())will therefore perform initialization of the parent class without having to forward all parameters manually. This is a convenience feature which reduces code bloat when many parameters have to be forwarded, see e.g.
carvefor an example.Expand source code Browse git
@staticmethod def superinit(spc, **keywords): """ This function uses `refinery.lib.tools.autoinvoke` to call the `__init__` function of `super` with by taking all required parameters from `keywords`, ignoring the rest. Calling ``` self.superinit(super(), **vars()) ``` will therefore perform initialization of the parent class without having to forward all parameters manually. This is a convenience feature which reduces code bloat when many parameters have to be forwarded, see e.g. `refinery.units.pattern.carve.carve` for an example. """ my_own_args = iter(inspect.signature(spc.__thisclass__.__init__).parameters.values()) parent_args = inspect.signature(spc.__init__).parameters keywords.pop(next(my_own_args).name, None) for a in my_own_args: if a.kind is a.VAR_KEYWORD: keywords.update(keywords.pop(a.name, {})) junk = [a for a in keywords] for a in parent_args.values(): if a.kind is a.VAR_KEYWORD: junk = [j for j in junk if j.startswith('_')] break try: junk.remove(a.name) except ValueError: pass for j in junk: del keywords[j] try: if spc.__init__.__func__ is Unit.__init__: return spc.__init__(**keywords) except AttributeError: pass return autoinvoke(spc.__init__, keywords) def assemble(*args, **keywords)-
Creates a unit from the given arguments and keywords. The given keywords are used to overwrite any previously specified defaults for the argument parser of the unit, then this modified parser is used to parse the given list of arguments as though they were given on the command line. The parser results are used to construct an instance of the unit, this object is consequently returned.
Expand source code Browse git
@classmethod def assemble(cls, *args, **keywords): """ Creates a unit from the given arguments and keywords. The given keywords are used to overwrite any previously specified defaults for the argument parser of the unit, then this modified parser is used to parse the given list of arguments as though they were given on the command line. The parser results are used to construct an instance of the unit, this object is consequently returned. """ argp = cls.argparser(**keywords) args = argp.parse_args_with_nesting(args) try: unit = autoinvoke(cls, args.__dict__) except ValueError as E: argp.error(str(E)) else: unit.args._store(_argo=argp.order) unit.args.quiet = args.quiet unit.args.lenient = args.lenient unit.args.squeeze = args.squeeze unit.args.nesting = args.nesting unit.args.reverse = args.reverse unit.args.devnull = args.devnull unit.args.verbose = args.verbose if args.quiet: unit.log_level = LogLevel.NONE else: unit.log_level = args.verbose return unit def run(argv=None, stream=None)-
Implements command line execution. As
Unitis anExecutable, this method will be executed when a class inheriting fromUnitis defined in the current__main__module.Expand source code Browse git
@classmethod def run(cls: Union[Type[Unit], Executable], argv=None, stream=None) -> None: """ Implements command line execution. As `refinery.units.Unit` is an `refinery.units.Executable`, this method will be executed when a class inheriting from `refinery.units.Unit` is defined in the current `__main__` module. """ if not environment.disable_ps1_bandaid.value: from refinery.lib import powershell ps1 = powershell.bandaid(cls.codec) else: ps1 = None try: sys.set_int_max_str_digits(0) except AttributeError: pass argv = argv if argv is not None else sys.argv[1:] clock = None yappi = None trace = False if cls._SECRET_DEBUG_TRACES_FLAG in argv: trace = True argv.remove(cls._SECRET_DEBUG_TRACES_FLAG) if cls._SECRET_DEBUG_TIMING_FLAG in argv: from time import process_time argv.remove(cls._SECRET_DEBUG_TIMING_FLAG) clock = process_time() cls.logger.setLevel(LogLevel.INFO) cls.logger.info('starting clock: {:.4f}'.format(clock)) if cls._SECRET_YAPPI_TIMING_FLAG in argv: argv.remove(cls._SECRET_YAPPI_TIMING_FLAG) try: import yappi as _yappi except ImportError: cls.logger.warn('unable to start yappi; package is missing') else: yappi = _yappi if stream is None: stream = open(os.devnull, 'rb') if sys.stdin.isatty() else sys.stdin.buffer with stream as source: try: unit = cls.assemble(*argv) except ArgparseError as ap: ap.parser.error_commandline(str(ap)) return except Exception as msg: if not trace: cls.logger.critical(cls._output('initialization failed:', msg)) else: from traceback import format_exc for line in format_exc().splitlines(keepends=False): cls.logger.critical(cls._output(line)) return if ps1: unit.log_debug(F'applying PowerShell band-aid for: {unit.name}') loglevel = environment.verbosity.value if loglevel: unit.log_level = loglevel if clock: unit.log_level = min(unit.log_level, LogLevel.INFO) unit.logger.info('unit launching: {:.4f}'.format(clock)) if yappi is not None: yappi.set_clock_type('cpu') yappi.start() try: with open(os.devnull, 'wb') if unit.args.devnull else sys.stdout.buffer as output: source | unit | output except ParserVariableMissing as E: unit.logger.error(F'the variable "{E!s}" was missing while trying to parse an expression') except ArgumentTypeError as E: unit.logger.error(F'delayed argument initialization failed: {E!s}') except KeyboardInterrupt: unit.logger.warning('aborting due to keyboard interrupt') except OSError: pass if yappi is not None: stats = yappi.get_func_stats() filename = F'{unit.name}.perf' stats.save(filename, type='CALLGRIND') cls.logger.info(F'wrote yappi results to file: {filename}') if clock: stop_clock = process_time() unit.logger.info('stopping clock: {:.4f}'.format(stop_clock)) unit.logger.info('time delta was: {:.4f}'.format(stop_clock - clock))
Instance variables
var is_quiet-
Expand source code Browse git
@property def is_quiet(self) -> bool: try: return self.args.quiet except AttributeError: return False var log_level-
Returns the current log level as an element of
refinery.units.LogLevel.Expand source code Browse git
@property def log_level(self) -> LogLevel: """ Returns the current log level as an element of `refinery.units.LogLevel`. """ if self.is_quiet: return LogLevel.NONE return LogLevel(self.logger.getEffectiveLevel()) var leniency-
Expand source code Browse git
@property def leniency(self) -> int: return getattr(self.args, 'lenient', 0) var source-
Represents a unit or binary IO stream which has been attached to this unit as its source of input data.
Expand source code Browse git
@property def source(self): """ Represents a unit or binary IO stream which has been attached to this unit as its source of input data. """ return self._source var nozzle-
The nozzle is defined recursively as the nozzle of
Unit.sourceandselfif no such thing exists. In other words, it is the leftmost unit in a pipeline, where data should be inserted for processing.Expand source code Browse git
@property def nozzle(self) -> Unit: """ The nozzle is defined recursively as the nozzle of `refinery.units.Unit.source` and `self` if no such thing exists. In other words, it is the leftmost unit in a pipeline, where data should be inserted for processing. """ try: return self.source.nozzle except AttributeError: return self var isatty-
Expand source code Browse git
@property def isatty(self) -> bool: try: return self._target.isatty() except AttributeError: return False
Methods
def log_detach(self)-
When a unit is created using the
Unit.assemble()method, it is attached to a logger by default (in less abstract terms, theUnit.log_levelproperty is set to a positive value). This method detaches the unit from its logger, which also means that any exceptions that occur during runtime will be raised to the caller.Expand source code Browse git
def log_detach(self) -> None: """ When a unit is created using the `refinery.units.Unit.assemble` method, it is attached to a logger by default (in less abstract terms, the `refinery.units.Unit.log_level` property is set to a positive value). This method detaches the unit from its logger, which also means that any exceptions that occur during runtime will be raised to the caller. """ self.log_level = LogLevel.DETACHED return self def reset(self)-
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def reset(self): try: self._source.reset() except AttributeError: pass self._framed = None self._chunks = None def read(self, bytecount=-1)-
Reads bytes from the output stream of this unit.
Expand source code Browse git
def read(self, bytecount: int = -1) -> bytes: """ Reads bytes from the output stream of this unit. """ if not bytecount or bytecount < 0: return self.read1() bfr = bytearray(bytecount) offset = 0 while offset < bytecount: tmp = self.read1(bytecount - offset) if not tmp: del bfr[offset:] break end = offset + len(tmp) bfr[offset:end] = tmp offset = end return bytes(bfr) def read1(self, bytecount=-1)-
Performs a single read against the output stream of this unit and returns the result.
Expand source code Browse git
def read1(self, bytecount: int = -1) -> bytes: """ Performs a single read against the output stream of this unit and returns the result. """ try: out = self._buffer or next(self) if bytecount and bytecount > 0: out, self._buffer = out[:bytecount], out[bytecount:] elif self._buffer: self._buffer = B'' return out except StopIteration: return B'' def act(self, data)-
Expand source code Browse git
def act(self, data: Union[Chunk, ByteString]) -> Union[Optional[ByteString], Generator[ByteString, None, None]]: mode = self.args.reverse data = self.args @ data if not mode: return self.process(data) elif mode % 2: return self.reverse(data) else: return self.reverse(self.process(data))
Inherited members