PEP 621 metadata parsing
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pyproject-metadata
Dataclass for PEP 621 metadata with support for core metadata generation
This project does not implement the parsing of pyproject.toml
containing PEP 621 metadata.
Instead, given a Python data structure representing PEP 621 metadata (already
parsed), it will validate this input and generate a PEP 643-compliant metadata
file (e.g. PKG-INFO).
Usage
After installing pyproject-metadata,
you can use it as a library in your scripts and programs:
from pyproject_metadata import StandardMetadata
parsed_pyproject = { ... } # you can use parsers like `tomli` to obtain this dict
metadata = StandardMetadata.from_pyproject(parsed_pyproject, allow_extra_keys = False)
print(metadata.entrypoints) # same fields as defined in PEP 621
pkg_info = metadata.as_rfc822()
print(str(pkg_info))) # core metadata
METADATA 2.4
If project.license is a string or project.license-files is present, then
METADATA 2.4+ will be used. A user is expected to validate and normalize
metadata.license with an SPDX validation tool, such as the one being added to
packaging. Add something like this:
if isinstance(metadata.license, str):
metadata.license = packaging.licenses.normalize_license_expression(metadata.license)
A backend is also expected to copy entries from project.licence_files, which
are paths relative to the project directory, into the dist-info/licenses
folder, preserving the original source structure.
