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91fd83a554
This patch introduces the basic infrastructure of the code generation suite and the `dbscheme` generator. Notice that the checked in `schema.yml` should reflect swift 5.6 but might need some tweaking. Closes https://github.com/github/codeql-c-team/issues/979
99 lines
2.6 KiB
Python
99 lines
2.6 KiB
Python
import pathlib
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from dataclasses import dataclass, field
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from enum import Enum, auto
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from typing import List, Set, Dict
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import re
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import yaml
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class Cardinality(Enum):
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ONE = auto()
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OPTIONAL = auto()
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MANY = auto()
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@dataclass
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class Field:
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name: str
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type: str
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cardinality: Cardinality = Cardinality.ONE
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def is_single(self):
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return self.cardinality == Cardinality.ONE
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def is_optional(self):
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return self.cardinality == Cardinality.OPTIONAL
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def is_repeated(self):
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return self.cardinality == Cardinality.MANY
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@dataclass
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class Class:
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name: str
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bases: Set[str] = field(default_factory=set)
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derived: Set[str] = field(default_factory=set)
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fields: List[Field] = field(default_factory=list)
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dir: pathlib.Path = pathlib.Path()
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@dataclass
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class Schema:
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classes: Dict[str, Class]
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includes: Set[str] = field(default_factory=set)
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def _parse_field(name, type):
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if type.endswith("*"):
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cardinality = Cardinality.MANY
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type = type[:-1]
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elif type.endswith("?"):
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cardinality = Cardinality.OPTIONAL
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type = type[:-1]
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else:
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cardinality = Cardinality.ONE
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return Field(name, type, cardinality)
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root_class_name = "Element"
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class DirSelector:
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def __init__(self, dir_to_patterns):
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self.selector = [(re.compile(p), pathlib.Path(d)) for d, p in dir_to_patterns]
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self.selector.append((re.compile(""), pathlib.Path()))
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def get(self, name):
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return next(d for p, d in self.selector if p.search(name))
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def load(file):
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data = yaml.load(file, Loader=yaml.SafeLoader)
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grouper = DirSelector(data.get("_directories", {}).items())
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ret = Schema(classes={cls: Class(cls, dir=grouper.get(cls)) for cls in data if not cls.startswith("_")},
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includes=set(data.get("_includes", [])))
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assert root_class_name not in ret.classes
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ret.classes[root_class_name] = Class(root_class_name)
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for name, info in data.items():
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if name.startswith("_"):
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continue
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assert name[0].isupper()
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cls = ret.classes[name]
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for k, v in info.items():
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if not k.startswith("_"):
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cls.fields.append(_parse_field(k, v))
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elif k == "_extends":
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if not isinstance(v, list):
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v = [v]
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for base in v:
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cls.bases.add(base)
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ret.classes[base].derived.add(name)
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elif k == "_dir":
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cls.dir = pathlib.Path(v)
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if not cls.bases:
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cls.bases.add(root_class_name)
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ret.classes[root_class_name].derived.add(name)
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return ret
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