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📄 configparser.py(10.82 KB)
📄 context.py(6.8 KB)
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📄 ctx.py(1.42 KB)
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📁 decorators
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📄 state.py(8.43 KB)
📄 stringio.py(355 B)
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📄 templates.py(23.92 KB)
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📁 validate
📄 value.py(247 B)
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📄 yamlloader_old.py(8.33 KB)
📄 yast.py(619 B)
📄 zeromq.py(1.65 KB)
📄 zfs.py(19.2 KB)

Editing: context.py

"""
    :codeauthor: Pedro Algarvio (pedro@algarvio.me)
    :codeauthor: Thomas Jackson (jacksontj.89@gmail.com)

salt.utils.context
    ~~~~~~~~~~~~~~~~~~

Context managers used throughout Salt's source code.
"""

import copy
import threading
from collections.abc import MutableMapping
from contextlib import contextmanager

@contextmanager
def func_globals_inject(func, **overrides):
    """
    Override specific variables within a function's global context.
    """
    # recognize methods
    if hasattr(func, "im_func") and func.im_func:
        func = func.__func__

# Get a reference to the function globals dictionary
    func_globals = func.__globals__
    # Save the current function globals dictionary state values for the
    # overridden objects
    injected_func_globals = []
    overridden_func_globals = {}
    for override in overrides:
        if override in func_globals:
            overridden_func_globals[override] = func_globals[override]
        else:
            injected_func_globals.append(override)

# Override the function globals with what's passed in the above overrides
    func_globals.update(overrides)

# The context is now ready to be used
    try:
        yield
    finally:
        # We're now done with the context

# Restore the overwritten function globals
        func_globals.update(overridden_func_globals)

# Remove any entry injected in the function globals
        for injected in injected_func_globals:
            del func_globals[injected]

class ContextDict(MutableMapping):
    """
    A context manager that saves some per-thread state globally.
    Intended for use with Tornado's StackContext.

Provide arbitrary data as kwargs upon creation,
    then allow any children to override the values of the parent.
    """

def __init__(self, threadsafe=False, **data):
        # state should be thread local, so this object can be threadsafe
        self._state = threading.local()
        # variable for the overridden data
        self._state.data = None
        self.global_data = {}
        # Threadsafety indicates whether or not we should protect data stored
        # in child context dicts from being leaked
        self._threadsafe = threadsafe

@property
    def active(self):
        """Determine if this ContextDict is currently overridden
        Since the ContextDict can be overridden in each thread, we check whether
        the _state.data is set or not.
        """
        try:
            return self._state.data is not None
        except AttributeError:
            return False

# TODO: rename?
    def clone(self, **kwargs):
        """
        Clone this context, and return the ChildContextDict
        """
        child = ChildContextDict(
            parent=self, threadsafe=self._threadsafe, overrides=kwargs
        )
        return child

def __setitem__(self, key, val):
        if self.active:
            self._state.data[key] = val
        else:
            self.global_data[key] = val

def __delitem__(self, key):
        if self.active:
            del self._state.data[key]
        else:
            del self.global_data[key]

def __getitem__(self, key):
        if self.active:
            return self._state.data[key]
        else:
            return self.global_data[key]

def __len__(self):
        if self.active:
            return len(self._state.data)
        else:
            return len(self.global_data)

def __iter__(self):
        if self.active:
            return iter(self._state.data)
        else:
            return iter(self.global_data)

def __copy__(self):
        new_obj = type(self)(threadsafe=self._threadsafe)
        if self.active:
            new_obj.global_data = copy.copy(self._state.data)
        else:
            new_obj.global_data = copy.copy(self.global_data)
        return new_obj

def __deepcopy__(self, memo):
        new_obj = type(self)(threadsafe=self._threadsafe)
        if self.active:
            new_obj.global_data = copy.deepcopy(self._state.data, memo)
        else:
            new_obj.global_data = copy.deepcopy(self.global_data, memo)
        return new_obj

class ChildContextDict(MutableMapping):
    """An overrideable child of ContextDict"""

def __init__(self, parent, overrides=None, threadsafe=False):
        self.parent = parent
        self._data = {} if overrides is None else overrides
        self._old_data = None

# merge self.global_data into self._data
        if threadsafe:
            for k, v in self.parent.global_data.items():
                if k not in self._data:
                    # A deepcopy is necessary to avoid using the same
                    # objects in globals as we do in thread local storage.
                    # Otherwise, changing one would automatically affect
                    # the other.
                    self._data[k] = copy.deepcopy(v)
        else:
            for k, v in self.parent.global_data.items():
                if k not in self._data:
                    self._data[k] = v

def __setitem__(self, key, val):
        self._data[key] = val

def __delitem__(self, key):
        del self._data[key]

def __getitem__(self, key):
        return self._data[key]

def __len__(self):
        return len(self._data)

def __iter__(self):
        return iter(self._data)

def __enter__(self):
        if hasattr(self.parent._state, "data"):
            # Save old data to support nested calls
            self._old_data = self.parent._state.data
        self.parent._state.data = self._data

def __exit__(self, *exc):
        self.parent._state.data = self._old_data

class NamespacedDictWrapper(MutableMapping, dict):
    """
    Create a dict which wraps another dict with a specific prefix of key(s)

MUST inherit from dict to serialize through msgpack correctly
    """

def __init__(self, d, pre_keys):  # pylint: disable=W0231
        self.__dict = d
        if isinstance(pre_keys, str):
            self.pre_keys = (pre_keys,)
        else:
            self.pre_keys = pre_keys
        super().__init__(self._dict())

def _dict(self):
        r = self.__dict
        for k in self.pre_keys:
            r = r[k]
        return r

def __repr__(self):
        return repr(self._dict())

def __setitem__(self, key, val):
        self._dict()[key] = val

def __delitem__(self, key):
        del self._dict()[key]

def __getitem__(self, key):
        return self._dict()[key]

def __len__(self):
        return len(self._dict())

def __iter__(self):
        return iter(self._dict())

def __copy__(self):
        return type(self)(copy.copy(self.__dict), copy.copy(self.pre_keys))

def __deepcopy__(self, memo):
        return type(self)(
            copy.deepcopy(self.__dict, memo), copy.deepcopy(self.pre_keys, memo)
        )

def __str__(self):
        return self._dict().__str__()

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