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usr
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lib
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python3.8
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site-packages
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pip
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_vendor
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pep517
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"""Build a project using PEP 517 hooks. """ import argparse import logging import os import toml import shutil from .envbuild import BuildEnvironment from .wrappers import Pep517HookCaller from .dirtools import tempdir, mkdir_p from .compat import FileNotFoundError log = logging.getLogger(__name__) def validate_system(system): """ Ensure build system has the requisite fields. """ required = {'requires', 'build-backend'} if not (required <= set(system)): message = "Missing required fields: {missing}".format( missing=required-set(system), ) raise ValueError(message) def load_system(source_dir): """ Load the build system from a source dir (pyproject.toml). """ pyproject = os.path.join(source_dir, 'pyproject.toml') with open(pyproject) as f: pyproject_data = toml.load(f) return pyproject_data['build-system'] def compat_system(source_dir): """ Given a source dir, attempt to get a build system backend and requirements from pyproject.toml. Fallback to setuptools but only if the file was not found or a build system was not indicated. """ try: system = load_system(source_dir) except (FileNotFoundError, KeyError): system = {} system.setdefault( 'build-backend', 'setuptools.build_meta:__legacy__', ) system.setdefault('requires', ['setuptools', 'wheel']) return system def _do_build(hooks, env, dist, dest): get_requires_name = 'get_requires_for_build_{dist}'.format(**locals()) get_requires = getattr(hooks, get_requires_name) reqs = get_requires({}) log.info('Got build requires: %s', reqs) env.pip_install(reqs) log.info('Installed dynamic build dependencies') with tempdir() as td: log.info('Trying to build %s in %s', dist, td) build_name = 'build_{dist}'.format(**locals()) build = getattr(hooks, build_name) filename = build(td, {}) source = os.path.join(td, filename) shutil.move(source, os.path.join(dest, os.path.basename(filename))) def build(source_dir, dist, dest=None, system=None): system = system or load_system(source_dir) dest = os.path.join(source_dir, dest or 'dist') mkdir_p(dest) validate_system(system) hooks = Pep517HookCaller( source_dir, system['build-backend'], system.get('backend-path') ) with BuildEnvironment() as env: env.pip_install(system['requires']) _do_build(hooks, env, dist, dest) parser = argparse.ArgumentParser() parser.add_argument( 'source_dir', help="A directory containing pyproject.toml", ) parser.add_argument( '--binary', '-b', action='store_true', default=False, ) parser.add_argument( '--source', '-s', action='store_true', default=False, ) parser.add_argument( '--out-dir', '-o', help="Destination in which to save the builds relative to source dir", ) def main(args): # determine which dists to build dists = list(filter(None, ( 'sdist' if args.source or not args.binary else None, 'wheel' if args.binary or not args.source else None, ))) for dist in dists: build(args.source_dir, dist, args.out_dir) if __name__ == '__main__': main(parser.parse_args())
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