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from __future__ import annotations
import os
import sys
import warnings
from typing import Any
from typing import Callable
from typing import Dict
from typing import NamedTuple
from typing_extensions import TypeAlias
from .setuptools import read_dist_name_from_setup_cfg
_ROOT = "root"
TOML_RESULT: TypeAlias = Dict[str, Any]
TOML_LOADER: TypeAlias = Callable[[str], TOML_RESULT]
class PyProjectData(NamedTuple):
name: str | os.PathLike[str]
tool_name: str
project: TOML_RESULT
section: TOML_RESULT
@property
def project_name(self) -> str | None:
return self.project.get("name")
def lazy_toml_load(data: str) -> TOML_RESULT:
if sys.version_info >= (3, 11):
from tomllib import loads
else:
from tomli import loads
return loads(data)
def read_pyproject(
name: str | os.PathLike[str] = "pyproject.toml",
tool_name: str = "setuptools_scm",
_load_toml: TOML_LOADER | None = None,
) -> PyProjectData:
if _load_toml is None:
_load_toml = lazy_toml_load
with open(name, encoding="UTF-8") as strm:
data = strm.read()
defn = _load_toml(data)
try:
section = defn.get("tool", {})[tool_name]
except LookupError as e:
raise LookupError(f"{name} does not contain a tool.{tool_name} section") from e
project = defn.get("project", {})
return PyProjectData(name, tool_name, project, section)
def get_args_for_pyproject(
pyproject: PyProjectData,
dist_name: str | None,
kwargs: TOML_RESULT,
) -> TOML_RESULT:
"""drops problematic details and figures the distribution name"""
section = pyproject.section.copy()
kwargs = kwargs.copy()
if "relative_to" in section:
relative = section.pop("relative_to")
warnings.warn(
f"{pyproject.name}: at [tool.{pyproject.tool_name}]\n"
f"ignoring value relative_to={relative!r}"
" as its always relative to the config file"
)
if "dist_name" in section:
if dist_name is None:
dist_name = section.pop("dist_name")
else:
assert dist_name == section["dist_name"]
section.pop("dist_name")
if dist_name is None:
# minimal pep 621 support for figuring the pretend keys
dist_name = pyproject.project_name
if dist_name is None:
dist_name = read_dist_name_from_setup_cfg()
if _ROOT in kwargs:
if kwargs[_ROOT] is None:
kwargs.pop(_ROOT, None)
elif _ROOT in section:
if section[_ROOT] != kwargs[_ROOT]:
warnings.warn(
f"root {section[_ROOT]} is overridden"
f" by the cli arg {kwargs[_ROOT]}"
)
section.pop("root", None)
return {"dist_name": dist_name, **section, **kwargs}
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