# encoding: utf-8
# api: pep517
# title: flit backend
# description: wraps flit_core.buildapi
# version: 0.2
# depends: python:flit (>=3.0, <4.0)
# license: BSD-3-Clause
# priority: extra
# src: ~/.local/lib/python3.8/site-packages/flit_core/
# pylint: disable=unused-import, wrong-import-position, wrong-import-order
#
# This is supposed to become an alternative to pluginconf.setup,
# using flit as pep517 build backend. But adding automagic field
# lookup of course.
#
# It can be invoked per `flit-pluginconfig build` and requires
# a `pyproject.toml` like:
#
# [build-system]
# requires = ["flit_core", "pluginconf"]
# build-backend = "pluginconf.flit"
#
# [project]
# name = "foobar"
# #dynamic = ["version", "description"]
#
# Injecting attributes between ini reading and parameter collection
# turned out easier than expanding on flit_core.buildapi functions.
# And lastly, this just chains to flit.main() to handle setup and
# build steps.
#
""" monkeypatches flint to use pluginconf sources for packaging """
import sys
import re
import functools
import flit_core.common
import flit_core.config
import pluginconf
import pluginconf.setup as psetup
#-- patchy patch
def inject(where):
""" monkeypatch into module """
def wrapped(func):
setattr(where, func.__name__, func)
return wrapped
@inject(flit_core.config)
def read_flit_config(path):
""" read_flit_config() with preset dynamic fields """
ini = flit_core.config.tomli.loads(path.read_text('utf-8'))
# make fields dynamic
if not "dynamic" in ini["project"]:
ini["project"]["dynamic"] = []
for dyn in ['description', 'version']:
if dyn in ini["project"]:
del ini["project"][dyn]
if not dyn in ini["project"]["dynamic"]:
ini["project"]["dynamic"].append(dyn)
print(ini)
# turn it into LoadedConfig
return flit_core.config.prep_toml_config(ini, path)
# override make_metadata
@inject(flit_core.common)
def make_metadata(module, ini_info):
""" different order, and obviously sources """
meta = {
"name": module.name,
"provides": [module.name]
}
meta.update(ini_info.metadata)
meta.update(
pmd_meta(
pluginconf.plugin_meta(filename=module.file),
ini_info
)
)
if not meta.get("version"):
meta.update(
flit_core.common.get_info_from_module(module.file, ['version'])
)
return flit_core.common.Metadata(meta)
# map plugin meta to flit Metadata
def pmd_meta(pmd, ini):
""" enjoin PMD fields with flit meta data """
pmd = psetup.MetaUtils(pmd)
meta = {
"summary": pmd.description,
"version": pmd.version,
"home_page": pmd.url,
"author": pmd.author, # should split this into mail and name
"author_email": None,
"maintainer": None,
"maintainer_email": None,
"license": pmd.license, # {name=…}
"keywords": pmd.get_keywords(),
"download_url": None,
"requires_python": pmd.python_requires() or ">= 2.7",
"platform": pmd.architecture,
"supported_platform": (),
"classifiers": list(pmd.classifiers()) + pmd.trove_license() + pmd.trove_status(),
"provides": (),
"requires": pmd.install_requires().get("install_requires") or (),
"obsoletes": (),
"project_urls": [f"{k}, {v}" for k, v in pmd.project_urls().items()],
"provides_dist": (),
"requires_dist": pmd.install_requires().get("install_requires") or (),
"obsoletes_dist": (),
"requires_external": (),
"provides_extra": (),
}
print(meta)
# comment/readme
for docs in pmd.plugin_doc(), psetup.get_readme():
if docs["long_description"]:
meta.update({ # with "long_" prefix cut off
k[5:]: v for k, v in docs.items()
})
# entry_points are in ini file
for section, entries in pmd.entry_points().items():
ini.entrypoints[section] = ini.entrypoints.get(section, {})
for script in entries:
ini.entrypoints[section].update(
dict(re.findall("(.+)=(.+)", script))
)
print(ini.entrypoints)
# strip empty entries
return {k: v for k, v in meta.items() if v}
#-- buildapi
from flit_core.buildapi import ( # These have to be late imports; else they'll
get_requires_for_build_wheel, # bind with the original buildapi functions.
get_requires_for_build_sdist,
get_requires_for_build_editable,
prepare_metadata_for_build_wheel,
prepare_metadata_for_build_editable,
build_wheel,
build_editable,
build_sdist,
)
#-- invocation point
from flit import main
if __name__ == "__main__":
main(sys.argv)