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"""Build metadata for a project using PEP 517 hooks.
"""
import argparse
import logging
import os
import shutil
import functools
try:
import importlib.metadata as imp_meta
except ImportError:
import importlib_metadata as imp_meta
try:
from zipfile import Path
except ImportError:
from zipp import Path
from .envbuild import BuildEnvironment
from .wrappers import Pep517HookCaller, quiet_subprocess_runner
from .dirtools import tempdir, mkdir_p, dir_to_zipfile
from .build import validate_system, load_system, compat_system
log = logging.getLogger(__name__)
def _prep_meta(hooks, env, dest):
reqs = hooks.get_requires_for_build_wheel({})
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 metadata in %s', td)
filename = hooks.prepare_metadata_for_build_wheel(td, {})
source = os.path.join(td, filename)
shutil.move(source, os.path.join(dest, os.path.basename(filename)))
def build(source_dir='.', 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 hooks.subprocess_runner(quiet_subprocess_runner):
with BuildEnvironment() as env:
env.pip_install(system['requires'])
_prep_meta(hooks, env, dest)
def build_as_zip(builder=build):
with tempdir() as out_dir:
builder(dest=out_dir)
return dir_to_zipfile(out_dir)
def load(root):
"""
Given a source directory (root) of a package,
return an importlib.metadata.Distribution object
with metadata build from that package.
"""
root = os.path.expanduser(root)
system = compat_system(root)
builder = functools.partial(build, source_dir=root, system=system)
path = Path(build_as_zip(builder))
return imp_meta.PathDistribution(path)
parser = argparse.ArgumentParser()
parser.add_argument(
'source_dir',
help="A directory containing pyproject.toml",
)
parser.add_argument(
'--out-dir', '-o',
help="Destination in which to save the builds relative to source dir",
)
def main():
args = parser.parse_args()
build(args.source_dir, args.out_dir)
if __name__ == '__main__':
main()