venv

1 files changed, 338 insertions, 0 deletions

diff --git a/venv/lib/python3.11/site-packages/sqlalchemy/ext/mypy/util.py b/venv/lib/python3.11/site-packages/sqlalchemy/ext/mypy/util.py
new file mode 100644
index 0000000..7f04c48
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+++ b/venv/lib/python3.11/site-packages/sqlalchemy/ext/mypy/util.py
@@ -0,0 +1,338 @@
+# ext/mypy/util.py
+# Copyright (C) 2021-2024 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+from __future__ import annotations
+
+import re
+from typing import Any
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import Optional
+from typing import overload
+from typing import Tuple
+from typing import Type as TypingType
+from typing import TypeVar
+from typing import Union
+
+from mypy import version
+from mypy.messages import format_type as _mypy_format_type
+from mypy.nodes import CallExpr
+from mypy.nodes import ClassDef
+from mypy.nodes import CLASSDEF_NO_INFO
+from mypy.nodes import Context
+from mypy.nodes import Expression
+from mypy.nodes import FuncDef
+from mypy.nodes import IfStmt
+from mypy.nodes import JsonDict
+from mypy.nodes import MemberExpr
+from mypy.nodes import NameExpr
+from mypy.nodes import Statement
+from mypy.nodes import SymbolTableNode
+from mypy.nodes import TypeAlias
+from mypy.nodes import TypeInfo
+from mypy.options import Options
+from mypy.plugin import ClassDefContext
+from mypy.plugin import DynamicClassDefContext
+from mypy.plugin import SemanticAnalyzerPluginInterface
+from mypy.plugins.common import deserialize_and_fixup_type
+from mypy.typeops import map_type_from_supertype
+from mypy.types import CallableType
+from mypy.types import get_proper_type
+from mypy.types import Instance
+from mypy.types import NoneType
+from mypy.types import Type
+from mypy.types import TypeVarType
+from mypy.types import UnboundType
+from mypy.types import UnionType
+
+_vers = tuple(
+    [int(x) for x in version.__version__.split(".") if re.match(r"^\d+$", x)]
+)
+mypy_14 = _vers >= (1, 4)
+
+
+_TArgType = TypeVar("_TArgType", bound=Union[CallExpr, NameExpr])
+
+
+class SQLAlchemyAttribute:
+    def __init__(
+        self,
+        name: str,
+        line: int,
+        column: int,
+        typ: Optional[Type],
+        info: TypeInfo,
+    ) -> None:
+        self.name = name
+        self.line = line
+        self.column = column
+        self.type = typ
+        self.info = info
+
+    def serialize(self) -> JsonDict:
+        assert self.type
+        return {
+            "name": self.name,
+            "line": self.line,
+            "column": self.column,
+            "type": self.type.serialize(),
+        }
+
+    def expand_typevar_from_subtype(self, sub_type: TypeInfo) -> None:
+        """Expands type vars in the context of a subtype when an attribute is
+        inherited from a generic super type.
+        """
+        if not isinstance(self.type, TypeVarType):
+            return
+
+        self.type = map_type_from_supertype(self.type, sub_type, self.info)
+
+    @classmethod
+    def deserialize(
+        cls,
+        info: TypeInfo,
+        data: JsonDict,
+        api: SemanticAnalyzerPluginInterface,
+    ) -> SQLAlchemyAttribute:
+        data = data.copy()
+        typ = deserialize_and_fixup_type(data.pop("type"), api)
+        return cls(typ=typ, info=info, **data)
+
+
+def name_is_dunder(name: str) -> bool:
+    return bool(re.match(r"^__.+?__$", name))
+
+
+def _set_info_metadata(info: TypeInfo, key: str, data: Any) -> None:
+    info.metadata.setdefault("sqlalchemy", {})[key] = data
+
+
+def _get_info_metadata(info: TypeInfo, key: str) -> Optional[Any]:
+    return info.metadata.get("sqlalchemy", {}).get(key, None)
+
+
+def _get_info_mro_metadata(info: TypeInfo, key: str) -> Optional[Any]:
+    if info.mro:
+        for base in info.mro:
+            metadata = _get_info_metadata(base, key)
+            if metadata is not None:
+                return metadata
+    return None
+
+
+def establish_as_sqlalchemy(info: TypeInfo) -> None:
+    info.metadata.setdefault("sqlalchemy", {})
+
+
+def set_is_base(info: TypeInfo) -> None:
+    _set_info_metadata(info, "is_base", True)
+
+
+def get_is_base(info: TypeInfo) -> bool:
+    is_base = _get_info_metadata(info, "is_base")
+    return is_base is True
+
+
+def has_declarative_base(info: TypeInfo) -> bool:
+    is_base = _get_info_mro_metadata(info, "is_base")
+    return is_base is True
+
+
+def set_has_table(info: TypeInfo) -> None:
+    _set_info_metadata(info, "has_table", True)
+
+
+def get_has_table(info: TypeInfo) -> bool:
+    is_base = _get_info_metadata(info, "has_table")
+    return is_base is True
+
+
+def get_mapped_attributes(
+    info: TypeInfo, api: SemanticAnalyzerPluginInterface
+) -> Optional[List[SQLAlchemyAttribute]]:
+    mapped_attributes: Optional[List[JsonDict]] = _get_info_metadata(
+        info, "mapped_attributes"
+    )
+    if mapped_attributes is None:
+        return None
+
+    attributes: List[SQLAlchemyAttribute] = []
+
+    for data in mapped_attributes:
+        attr = SQLAlchemyAttribute.deserialize(info, data, api)
+        attr.expand_typevar_from_subtype(info)
+        attributes.append(attr)
+
+    return attributes
+
+
+def format_type(typ_: Type, options: Options) -> str:
+    if mypy_14:
+        return _mypy_format_type(typ_, options)
+    else:
+        return _mypy_format_type(typ_)  # type: ignore
+
+
+def set_mapped_attributes(
+    info: TypeInfo, attributes: List[SQLAlchemyAttribute]
+) -> None:
+    _set_info_metadata(
+        info,
+        "mapped_attributes",
+        [attribute.serialize() for attribute in attributes],
+    )
+
+
+def fail(api: SemanticAnalyzerPluginInterface, msg: str, ctx: Context) -> None:
+    msg = "[SQLAlchemy Mypy plugin] %s" % msg
+    return api.fail(msg, ctx)
+
+
+def add_global(
+    ctx: Union[ClassDefContext, DynamicClassDefContext],
+    module: str,
+    symbol_name: str,
+    asname: str,
+) -> None:
+    module_globals = ctx.api.modules[ctx.api.cur_mod_id].names
+
+    if asname not in module_globals:
+        lookup_sym: SymbolTableNode = ctx.api.modules[module].names[
+            symbol_name
+        ]
+
+        module_globals[asname] = lookup_sym
+
+
+@overload
+def get_callexpr_kwarg(
+    callexpr: CallExpr, name: str, *, expr_types: None = ...
+) -> Optional[Union[CallExpr, NameExpr]]: ...
+
+
+@overload
+def get_callexpr_kwarg(
+    callexpr: CallExpr,
+    name: str,
+    *,
+    expr_types: Tuple[TypingType[_TArgType], ...],
+) -> Optional[_TArgType]: ...
+
+
+def get_callexpr_kwarg(
+    callexpr: CallExpr,
+    name: str,
+    *,
+    expr_types: Optional[Tuple[TypingType[Any], ...]] = None,
+) -> Optional[Any]:
+    try:
+        arg_idx = callexpr.arg_names.index(name)
+    except ValueError:
+        return None
+
+    kwarg = callexpr.args[arg_idx]
+    if isinstance(
+        kwarg, expr_types if expr_types is not None else (NameExpr, CallExpr)
+    ):
+        return kwarg
+
+    return None
+
+
+def flatten_typechecking(stmts: Iterable[Statement]) -> Iterator[Statement]:
+    for stmt in stmts:
+        if (
+            isinstance(stmt, IfStmt)
+            and isinstance(stmt.expr[0], NameExpr)
+            and stmt.expr[0].fullname == "typing.TYPE_CHECKING"
+        ):
+            yield from stmt.body[0].body
+        else:
+            yield stmt
+
+
+def type_for_callee(callee: Expression) -> Optional[Union[Instance, TypeInfo]]:
+    if isinstance(callee, (MemberExpr, NameExpr)):
+        if isinstance(callee.node, FuncDef):
+            if callee.node.type and isinstance(callee.node.type, CallableType):
+                ret_type = get_proper_type(callee.node.type.ret_type)
+
+                if isinstance(ret_type, Instance):
+                    return ret_type
+
+            return None
+        elif isinstance(callee.node, TypeAlias):
+            target_type = get_proper_type(callee.node.target)
+            if isinstance(target_type, Instance):
+                return target_type
+        elif isinstance(callee.node, TypeInfo):
+            return callee.node
+    return None
+
+
+def unbound_to_instance(
+    api: SemanticAnalyzerPluginInterface, typ: Type
+) -> Type:
+    """Take the UnboundType that we seem to get as the ret_type from a FuncDef
+    and convert it into an Instance/TypeInfo kind of structure that seems
+    to work as the left-hand type of an AssignmentStatement.
+
+    """
+
+    if not isinstance(typ, UnboundType):
+        return typ
+
+    # TODO: figure out a more robust way to check this.  The node is some
+    # kind of _SpecialForm, there's a typing.Optional that's _SpecialForm,
+    # but I can't figure out how to get them to match up
+    if typ.name == "Optional":
+        # convert from "Optional?" to the more familiar
+        # UnionType[..., NoneType()]
+        return unbound_to_instance(
+            api,
+            UnionType(
+                [unbound_to_instance(api, typ_arg) for typ_arg in typ.args]
+                + [NoneType()]
+            ),
+        )
+
+    node = api.lookup_qualified(typ.name, typ)
+
+    if (
+        node is not None
+        and isinstance(node, SymbolTableNode)
+        and isinstance(node.node, TypeInfo)
+    ):
+        bound_type = node.node
+
+        return Instance(
+            bound_type,
+            [
+                (
+                    unbound_to_instance(api, arg)
+                    if isinstance(arg, UnboundType)
+                    else arg
+                )
+                for arg in typ.args
+            ],
+        )
+    else:
+        return typ
+
+
+def info_for_cls(
+    cls: ClassDef, api: SemanticAnalyzerPluginInterface
+) -> Optional[TypeInfo]:
+    if cls.info is CLASSDEF_NO_INFO:
+        sym = api.lookup_qualified(cls.name, cls)
+        if sym is None:
+            return None
+        assert sym and isinstance(sym.node, TypeInfo)
+        return sym.node
+
+    return cls.info