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- """The purpose of this module is implement PEP 621 validations that are
- difficult to express as a JSON Schema (or that are not supported by the current
- JSON Schema library).
- """
- from typing import Mapping, TypeVar
- from .error_reporting import ValidationError
- T = TypeVar("T", bound=Mapping)
- class RedefiningStaticFieldAsDynamic(ValidationError):
- """According to PEP 621:
- Build back-ends MUST raise an error if the metadata specifies a field
- statically as well as being listed in dynamic.
- """
- def validate_project_dynamic(pyproject: T) -> T:
- project_table = pyproject.get("project", {})
- dynamic = project_table.get("dynamic", [])
- for field in dynamic:
- if field in project_table:
- msg = f"You cannot provide a value for `project.{field}` and "
- msg += "list it under `project.dynamic` at the same time"
- name = f"data.project.{field}"
- value = {field: project_table[field], "...": " # ...", "dynamic": dynamic}
- raise RedefiningStaticFieldAsDynamic(msg, value, name, rule="PEP 621")
- return pyproject
- EXTRA_VALIDATIONS = (validate_project_dynamic,)
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