attrs plugin does not implement the new attributes collection algorithm

Bug Report

The attrs plugin does not implement the new attributes collection algorithm that is enabled with @attr.s(collect_by_mro=True) in the old API and is the only option in the new API.

To Reproduce

(mypy-play.net does not have stubs for attrs)

from attrs import define, field

@define
class A:
    f: int = field(kw_only=True)

@define
class B(A):
    pass

@define
class C(A):
    f: int = field()

@define
class D(B, C):
    pass

# D(f: int) for attrs.define, but D(*, f: int) for attr.s
d = D(123)
print(d.f)

Expected Behavior

The signature for D should be D(f: int), so this should type check. It works fine at run time.

Actual Behavior

attrs_mro.py:20: error: Too many positional arguments for "D"  [misc]

I get the same error if I replace @define and field with @attrs(collect_by_mro=True) and attrib from the old namespace respectively. Note that this behavior is correct when @attrs is used without collect_by_mro=True.

Your Environment

• Mypy version used: 1.5.1
• Python version used: 3.11

mypy's attrs pluginから始め、attrs.define、field、collect_by_mro=Trueを使って報告された多重継承の例を再現します。推論されたコンストラクターシグネチャを期待されるD(f: int)の動作と比較し、位置引数による呼び出しが型チェックを通過するようにカバレッジを追加または更新し、既存のnon-collect_by_mroの動作が正しいままであることを確認します。