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typing: add type annotations to the dirstate classes...
typing: add type annotations to the dirstate classes The basic procedure here was to use `merge-pyi` to merge the `git/dirstate.pyi` file in (after renaming the interface class to match), cleaning up the import statement mess, and then repeating the procedure for `mercurial/dirstate.pyi`. Surprisingly, git's dirstate had more hints inferred in its *.pyi file. After that, it was a manual examination of each method in the interface, and how they were implemented in the core and git classes to verify what was inferred by pytype, and fill in the missing gaps. Since this involved jumping around between three different files, I applied the same type info to all three at the same time. Complex types I rolled up into type aliases in the interface module, and used that as needed. That way if it changes, there's one place to edit. There are some hints still missing, and some documentation that doesn't match the signatures. They should all be marked with TODOs. There are also a bunch of methods on the core class that aren't on the Protocol class that seem like maybe they should be (like `set_tracked()`). There are even more methods missing from the git class. But that's a project for another time.
Matt Harbison - - Load All Authors

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exceptions.py
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# SPDX-License-Identifier: MIT
class FrozenError(AttributeError):
"""
A frozen/immutable instance or attribute have been attempted to be
modified.
It mirrors the behavior of ``namedtuples`` by using the same error message
and subclassing `AttributeError`.
.. versionadded:: 20.1.0
"""
msg = "can't set attribute"
args = [msg]
class FrozenInstanceError(FrozenError):
"""
A frozen instance has been attempted to be modified.
.. versionadded:: 16.1.0
"""
class FrozenAttributeError(FrozenError):
"""
A frozen attribute has been attempted to be modified.
.. versionadded:: 20.1.0
"""
class AttrsAttributeNotFoundError(ValueError):
"""
An ``attrs`` function couldn't find an attribute that the user asked for.
.. versionadded:: 16.2.0
"""
class NotAnAttrsClassError(ValueError):
"""
A non-``attrs`` class has been passed into an ``attrs`` function.
.. versionadded:: 16.2.0
"""
class DefaultAlreadySetError(RuntimeError):
"""
A default has been set using ``attr.ib()`` and is attempted to be reset
using the decorator.
.. versionadded:: 17.1.0
"""
class UnannotatedAttributeError(RuntimeError):
"""
A class with ``auto_attribs=True`` has an ``attr.ib()`` without a type
annotation.
.. versionadded:: 17.3.0
"""
class PythonTooOldError(RuntimeError):
"""
It was attempted to use an ``attrs`` feature that requires a newer Python
version.
.. versionadded:: 18.2.0
"""
class NotCallableError(TypeError):
"""
A ``attr.ib()`` requiring a callable has been set with a value
that is not callable.
.. versionadded:: 19.2.0
"""
def __init__(self, msg, value):
super(TypeError, self).__init__(msg, value)
self.msg = msg
self.value = value
def __str__(self):
return str(self.msg)