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📁 ..	-	2026-03-21 15:53
📄 __init__.py """Wrappers to build Python packages using PEP 517 hooks """ __version__ = '0.12.0' from .wrappers import * # noqa: F401, F403	130 B	2026-01-07 23:39
📁 __pycache__	-	2026-03-21 15:53
📄 build.py """Build a project using PEP 517 hooks. """ import argparse import io import logging import os import shutil from .envbuild import BuildEnvironment from .wrappers import Pep517HookCaller from .dirtools import tempdir, mkdir_p from .compat import FileNotFoundError, toml_load 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 io.open(pyproject, 'rb') 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): log.warning('pep517.build is deprecated. ' 'Consider switching to https://pypi.org/project/build/') # 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())	3.38 KB	2026-01-07 23:39
📄 check.py """Check a project and backend by attempting to build using PEP 517 hooks. """ import argparse import io import logging import os from os.path import isfile, join as pjoin import shutil from subprocess import CalledProcessError import sys import tarfile from tempfile import mkdtemp import zipfile from .colorlog import enable_colourful_output from .compat import TOMLDecodeError, toml_load from .envbuild import BuildEnvironment from .wrappers import Pep517HookCaller log = logging.getLogger(__name__) def check_build_sdist(hooks, build_sys_requires): with BuildEnvironment() as env: try: env.pip_install(build_sys_requires) log.info('Installed static build dependencies') except CalledProcessError: log.error('Failed to install static build dependencies') return False try: reqs = hooks.get_requires_for_build_sdist({}) log.info('Got build requires: %s', reqs) except Exception: log.error('Failure in get_requires_for_build_sdist', exc_info=True) return False try: env.pip_install(reqs) log.info('Installed dynamic build dependencies') except CalledProcessError: log.error('Failed to install dynamic build dependencies') return False td = mkdtemp() log.info('Trying to build sdist in %s', td) try: try: filename = hooks.build_sdist(td, {}) log.info('build_sdist returned %r', filename) except Exception: log.info('Failure in build_sdist', exc_info=True) return False if not filename.endswith('.tar.gz'): log.error( "Filename %s doesn't have .tar.gz extension", filename) return False path = pjoin(td, filename) if isfile(path): log.info("Output file %s exists", path) else: log.error("Output file %s does not exist", path) return False if tarfile.is_tarfile(path): log.info("Output file is a tar file") else: log.error("Output file is not a tar file") return False finally: shutil.rmtree(td) return True def check_build_wheel(hooks, build_sys_requires): with BuildEnvironment() as env: try: env.pip_install(build_sys_requires) log.info('Installed static build dependencies') except CalledProcessError: log.error('Failed to install static build dependencies') return False try: reqs = hooks.get_requires_for_build_wheel({}) log.info('Got build requires: %s', reqs) except Exception: log.error('Failure in get_requires_for_build_sdist', exc_info=True) return False try: env.pip_install(reqs) log.info('Installed dynamic build dependencies') except CalledProcessError: log.error('Failed to install dynamic build dependencies') return False td = mkdtemp() log.info('Trying to build wheel in %s', td) try: try: filename = hooks.build_wheel(td, {}) log.info('build_wheel returned %r', filename) except Exception: log.info('Failure in build_wheel', exc_info=True) return False if not filename.endswith('.whl'): log.error("Filename %s doesn't have .whl extension", filename) return False path = pjoin(td, filename) if isfile(path): log.info("Output file %s exists", path) else: log.error("Output file %s does not exist", path) return False if zipfile.is_zipfile(path): log.info("Output file is a zip file") else: log.error("Output file is not a zip file") return False finally: shutil.rmtree(td) return True def check(source_dir): pyproject = pjoin(source_dir, 'pyproject.toml') if isfile(pyproject): log.info('Found pyproject.toml') else: log.error('Missing pyproject.toml') return False try: with io.open(pyproject, 'rb') as f: pyproject_data = toml_load(f) # Ensure the mandatory data can be loaded buildsys = pyproject_data['build-system'] requires = buildsys['requires'] backend = buildsys['build-backend'] backend_path = buildsys.get('backend-path') log.info('Loaded pyproject.toml') except (TOMLDecodeError, KeyError): log.error("Invalid pyproject.toml", exc_info=True) return False hooks = Pep517HookCaller(source_dir, backend, backend_path) sdist_ok = check_build_sdist(hooks, requires) wheel_ok = check_build_wheel(hooks, requires) if not sdist_ok: log.warning('Sdist checks failed; scroll up to see') if not wheel_ok: log.warning('Wheel checks failed') return sdist_ok def main(argv=None): log.warning('pep517.check is deprecated. ' 'Consider switching to https://pypi.org/project/build/') ap = argparse.ArgumentParser() ap.add_argument( 'source_dir', help="A directory containing pyproject.toml") args = ap.parse_args(argv) enable_colourful_output() ok = check(args.source_dir) if ok: print(ansi('Checks passed', 'green')) else: print(ansi('Checks failed', 'red')) sys.exit(1) ansi_codes = { 'reset': '\x1b[0m', 'bold': '\x1b[1m', 'red': '\x1b[31m', 'green': '\x1b[32m', } def ansi(s, attr): if os.name != 'nt' and sys.stdout.isatty(): return ansi_codes[attr] + str(s) + ansi_codes['reset'] else: return str(s) if __name__ == '__main__': main()	5.94 KB	2026-01-07 23:39
📄 colorlog.py """Nicer log formatting with colours. Code copied from Tornado, Apache licensed. """ # Copyright 2012 Facebook # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. import logging import sys try: import curses except ImportError: curses = None def _stderr_supports_color(): color = False if curses and hasattr(sys.stderr, 'isatty') and sys.stderr.isatty(): try: curses.setupterm() if curses.tigetnum("colors") > 0: color = True except Exception: pass return color class LogFormatter(logging.Formatter): """Log formatter with colour support """ DEFAULT_COLORS = { logging.INFO: 2, # Green logging.WARNING: 3, # Yellow logging.ERROR: 1, # Red logging.CRITICAL: 1, } def __init__(self, color=True, datefmt=None): r""" :arg bool color: Enables color support. :arg string fmt: Log message format. It will be applied to the attributes dict of log records. The text between ``%(color)s`` and ``%(end_color)s`` will be colored depending on the level if color support is on. :arg dict colors: color mappings from logging level to terminal color code :arg string datefmt: Datetime format. Used for formatting ``(asctime)`` placeholder in ``prefix_fmt``. .. versionchanged:: 3.2 Added ``fmt`` and ``datefmt`` arguments. """ logging.Formatter.__init__(self, datefmt=datefmt) self._colors = {} if color and _stderr_supports_color(): # The curses module has some str/bytes confusion in # python3. Until version 3.2.3, most methods return # bytes, but only accept strings. In addition, we want to # output these strings with the logging module, which # works with unicode strings. The explicit calls to # unicode() below are harmless in python2 but will do the # right conversion in python 3. fg_color = (curses.tigetstr("setaf") or curses.tigetstr("setf") or "") if (3, 0) < sys.version_info < (3, 2, 3): fg_color = str(fg_color, "ascii") for levelno, code in self.DEFAULT_COLORS.items(): self._colors[levelno] = str( curses.tparm(fg_color, code), "ascii") self._normal = str(curses.tigetstr("sgr0"), "ascii") scr = curses.initscr() self.termwidth = scr.getmaxyx()[1] curses.endwin() else: self._normal = '' # Default width is usually 80, but too wide is # worse than too narrow self.termwidth = 70 def formatMessage(self, record): mlen = len(record.message) right_text = '{initial}-{name}'.format(initial=record.levelname[0], name=record.name) if mlen + len(right_text) < self.termwidth: space = ' ' * (self.termwidth - (mlen + len(right_text))) else: space = ' ' if record.levelno in self._colors: start_color = self._colors[record.levelno] end_color = self._normal else: start_color = end_color = '' return record.message + space + start_color + right_text + end_color def enable_colourful_output(level=logging.INFO): handler = logging.StreamHandler() handler.setFormatter(LogFormatter()) logging.root.addHandler(handler) logging.root.setLevel(level)	4 KB	2026-01-07 23:39
📄 compat.py """Python 2/3 compatibility""" import io import json import sys # Handle reading and writing JSON in UTF-8, on Python 3 and 2. if sys.version_info[0] >= 3: # Python 3 def write_json(obj, path, kwargs): with open(path, 'w', encoding='utf-8') as f: json.dump(obj, f, kwargs) def read_json(path): with open(path, 'r', encoding='utf-8') as f: return json.load(f) else: # Python 2 def write_json(obj, path, kwargs): with open(path, 'wb') as f: json.dump(obj, f, encoding='utf-8', kwargs) def read_json(path): with open(path, 'rb') as f: return json.load(f) # FileNotFoundError try: FileNotFoundError = FileNotFoundError except NameError: FileNotFoundError = IOError if sys.version_info < (3, 6): from toml import load as _toml_load # noqa: F401 def toml_load(f): w = io.TextIOWrapper(f, encoding="utf8", newline="") try: return _toml_load(w) finally: w.detach() from toml import TomlDecodeError as TOMLDecodeError # noqa: F401 else: from pip._vendor.tomli import load as toml_load # noqa: F401 from pip._vendor.tomli import TOMLDecodeError # noqa: F401	1.22 KB	2026-01-07 23:39
📄 dirtools.py import os import io import contextlib import tempfile import shutil import errno import zipfile @contextlib.contextmanager def tempdir(): """Create a temporary directory in a context manager.""" td = tempfile.mkdtemp() try: yield td finally: shutil.rmtree(td) def mkdir_p(args, kwargs): """Like `mkdir`, but does not raise an exception if the directory already exists. """ try: return os.mkdir(args, **kwargs) except OSError as exc: if exc.errno != errno.EEXIST: raise def dir_to_zipfile(root): """Construct an in-memory zip file for a directory.""" buffer = io.BytesIO() zip_file = zipfile.ZipFile(buffer, 'w') for root, dirs, files in os.walk(root): for path in dirs: fs_path = os.path.join(root, path) rel_path = os.path.relpath(fs_path, root) zip_file.writestr(rel_path + '/', '') for path in files: fs_path = os.path.join(root, path) rel_path = os.path.relpath(fs_path, root) zip_file.write(fs_path, rel_path) return zip_file	1.1 KB	2026-01-07 23:39
📄 envbuild.py """Build wheels/sdists by installing build deps to a temporary environment. """ import io import os import logging import shutil from subprocess import check_call import sys from sysconfig import get_paths from tempfile import mkdtemp from .compat import toml_load from .wrappers import Pep517HookCaller, LoggerWrapper log = logging.getLogger(__name__) def _load_pyproject(source_dir): with io.open( os.path.join(source_dir, 'pyproject.toml'), 'rb', ) as f: pyproject_data = toml_load(f) buildsys = pyproject_data['build-system'] return ( buildsys['requires'], buildsys['build-backend'], buildsys.get('backend-path'), ) class BuildEnvironment(object): """Context manager to install build deps in a simple temporary environment Based on code I wrote for pip, which is MIT licensed. """ # Copyright (c) 2008-2016 The pip developers (see AUTHORS.txt file) # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. path = None def __init__(self, cleanup=True): self._cleanup = cleanup def __enter__(self): self.path = mkdtemp(prefix='pep517-build-env-') log.info('Temporary build environment: %s', self.path) self.save_path = os.environ.get('PATH', None) self.save_pythonpath = os.environ.get('PYTHONPATH', None) install_scheme = 'nt' if (os.name == 'nt') else 'posix_prefix' install_dirs = get_paths(install_scheme, vars={ 'base': self.path, 'platbase': self.path, }) scripts = install_dirs['scripts'] if self.save_path: os.environ['PATH'] = scripts + os.pathsep + self.save_path else: os.environ['PATH'] = scripts + os.pathsep + os.defpath if install_dirs['purelib'] == install_dirs['platlib']: lib_dirs = install_dirs['purelib'] else: lib_dirs = install_dirs['purelib'] + os.pathsep + \ install_dirs['platlib'] if self.save_pythonpath: os.environ['PYTHONPATH'] = lib_dirs + os.pathsep + \ self.save_pythonpath else: os.environ['PYTHONPATH'] = lib_dirs return self def pip_install(self, reqs): """Install dependencies into this env by calling pip in a subprocess""" if not reqs: return log.info('Calling pip to install %s', reqs) cmd = [ sys.executable, '-m', 'pip', 'install', '--ignore-installed', '--prefix', self.path] + list(reqs) check_call( cmd, stdout=LoggerWrapper(log, logging.INFO), stderr=LoggerWrapper(log, logging.ERROR), ) def __exit__(self, exc_type, exc_val, exc_tb): needs_cleanup = ( self._cleanup and self.path is not None and os.path.isdir(self.path) ) if needs_cleanup: shutil.rmtree(self.path) if self.save_path is None: os.environ.pop('PATH', None) else: os.environ['PATH'] = self.save_path if self.save_pythonpath is None: os.environ.pop('PYTHONPATH', None) else: os.environ['PYTHONPATH'] = self.save_pythonpath def build_wheel(source_dir, wheel_dir, config_settings=None): """Build a wheel from a source directory using PEP 517 hooks. :param str source_dir: Source directory containing pyproject.toml :param str wheel_dir: Target directory to create wheel in :param dict config_settings: Options to pass to build backend This is a blocking function which will run pip in a subprocess to install build requirements. """ if config_settings is None: config_settings = {} requires, backend, backend_path = _load_pyproject(source_dir) hooks = Pep517HookCaller(source_dir, backend, backend_path) with BuildEnvironment() as env: env.pip_install(requires) reqs = hooks.get_requires_for_build_wheel(config_settings) env.pip_install(reqs) return hooks.build_wheel(wheel_dir, config_settings) def build_sdist(source_dir, sdist_dir, config_settings=None): """Build an sdist from a source directory using PEP 517 hooks. :param str source_dir: Source directory containing pyproject.toml :param str sdist_dir: Target directory to place sdist in :param dict config_settings: Options to pass to build backend This is a blocking function which will run pip in a subprocess to install build requirements. """ if config_settings is None: config_settings = {} requires, backend, backend_path = _load_pyproject(source_dir) hooks = Pep517HookCaller(source_dir, backend, backend_path) with BuildEnvironment() as env: env.pip_install(requires) reqs = hooks.get_requires_for_build_sdist(config_settings) env.pip_install(reqs) return hooks.build_sdist(sdist_dir, config_settings)	5.96 KB	2026-01-07 23:39
📁 in_process	-	2026-03-21 15:53
📄 meta.py """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()	2.41 KB	2026-01-07 23:39
📄 wrappers.py import threading from contextlib import contextmanager import os from os.path import abspath, join as pjoin import shutil from subprocess import check_call, check_output, STDOUT import sys from tempfile import mkdtemp from . import compat from .in_process import _in_proc_script_path __all__ = [ 'BackendUnavailable', 'BackendInvalid', 'HookMissing', 'UnsupportedOperation', 'default_subprocess_runner', 'quiet_subprocess_runner', 'Pep517HookCaller', ] @contextmanager def tempdir(): td = mkdtemp() try: yield td finally: shutil.rmtree(td) class BackendUnavailable(Exception): """Will be raised if the backend cannot be imported in the hook process.""" def __init__(self, traceback): self.traceback = traceback class BackendInvalid(Exception): """Will be raised if the backend is invalid.""" def __init__(self, backend_name, backend_path, message): self.backend_name = backend_name self.backend_path = backend_path self.message = message class HookMissing(Exception): """Will be raised on missing hooks.""" def __init__(self, hook_name): super(HookMissing, self).__init__(hook_name) self.hook_name = hook_name class UnsupportedOperation(Exception): """May be raised by build_sdist if the backend indicates that it can't.""" def __init__(self, traceback): self.traceback = traceback def default_subprocess_runner(cmd, cwd=None, extra_environ=None): """The default method of calling the wrapper subprocess.""" env = os.environ.copy() if extra_environ: env.update(extra_environ) check_call(cmd, cwd=cwd, env=env) def quiet_subprocess_runner(cmd, cwd=None, extra_environ=None): """A method of calling the wrapper subprocess while suppressing output.""" env = os.environ.copy() if extra_environ: env.update(extra_environ) check_output(cmd, cwd=cwd, env=env, stderr=STDOUT) def norm_and_check(source_tree, requested): """Normalise and check a backend path. Ensure that the requested backend path is specified as a relative path, and resolves to a location under the given source tree. Return an absolute version of the requested path. """ if os.path.isabs(requested): raise ValueError("paths must be relative") abs_source = os.path.abspath(source_tree) abs_requested = os.path.normpath(os.path.join(abs_source, requested)) # We have to use commonprefix for Python 2.7 compatibility. So we # normalise case to avoid problems because commonprefix is a character # based comparison :-( norm_source = os.path.normcase(abs_source) norm_requested = os.path.normcase(abs_requested) if os.path.commonprefix([norm_source, norm_requested]) != norm_source: raise ValueError("paths must be inside source tree") return abs_requested class Pep517HookCaller(object): """A wrapper around a source directory to be built with a PEP 517 backend. :param source_dir: The path to the source directory, containing pyproject.toml. :param build_backend: The build backend spec, as per PEP 517, from pyproject.toml. :param backend_path: The backend path, as per PEP 517, from pyproject.toml. :param runner: A callable that invokes the wrapper subprocess. :param python_executable: The Python executable used to invoke the backend The 'runner', if provided, must expect the following: - cmd: a list of strings representing the command and arguments to execute, as would be passed to e.g. 'subprocess.check_call'. - cwd: a string representing the working directory that must be used for the subprocess. Corresponds to the provided source_dir. - extra_environ: a dict mapping environment variable names to values which must be set for the subprocess execution. """ def __init__( self, source_dir, build_backend, backend_path=None, runner=None, python_executable=None, ): if runner is None: runner = default_subprocess_runner self.source_dir = abspath(source_dir) self.build_backend = build_backend if backend_path: backend_path = [ norm_and_check(self.source_dir, p) for p in backend_path ] self.backend_path = backend_path self._subprocess_runner = runner if not python_executable: python_executable = sys.executable self.python_executable = python_executable @contextmanager def subprocess_runner(self, runner): """A context manager for temporarily overriding the default subprocess runner. """ prev = self._subprocess_runner self._subprocess_runner = runner try: yield finally: self._subprocess_runner = prev def _supported_features(self): """Return the list of optional features supported by the backend.""" return self._call_hook('_supported_features', {}) def get_requires_for_build_wheel(self, config_settings=None): """Identify packages required for building a wheel Returns a list of dependency specifications, e.g.:: ["wheel >= 0.25", "setuptools"] This does not include requirements specified in pyproject.toml. It returns the result of calling the equivalently named hook in a subprocess. """ return self._call_hook('get_requires_for_build_wheel', { 'config_settings': config_settings }) def prepare_metadata_for_build_wheel( self, metadata_directory, config_settings=None, _allow_fallback=True): """Prepare a ``.dist-info`` folder with metadata for this project. Returns the name of the newly created folder. If the build backend defines a hook with this name, it will be called in a subprocess. If not, the backend will be asked to build a wheel, and the dist-info extracted from that (unless _allow_fallback is False). """ return self._call_hook('prepare_metadata_for_build_wheel', { 'metadata_directory': abspath(metadata_directory), 'config_settings': config_settings, '_allow_fallback': _allow_fallback, }) def build_wheel( self, wheel_directory, config_settings=None, metadata_directory=None): """Build a wheel from this project. Returns the name of the newly created file. In general, this will call the 'build_wheel' hook in the backend. However, if that was previously called by 'prepare_metadata_for_build_wheel', and the same metadata_directory is used, the previously built wheel will be copied to wheel_directory. """ if metadata_directory is not None: metadata_directory = abspath(metadata_directory) return self._call_hook('build_wheel', { 'wheel_directory': abspath(wheel_directory), 'config_settings': config_settings, 'metadata_directory': metadata_directory, }) def get_requires_for_build_editable(self, config_settings=None): """Identify packages required for building an editable wheel Returns a list of dependency specifications, e.g.:: ["wheel >= 0.25", "setuptools"] This does not include requirements specified in pyproject.toml. It returns the result of calling the equivalently named hook in a subprocess. """ return self._call_hook('get_requires_for_build_editable', { 'config_settings': config_settings }) def prepare_metadata_for_build_editable( self, metadata_directory, config_settings=None, _allow_fallback=True): """Prepare a ``.dist-info`` folder with metadata for this project. Returns the name of the newly created folder. If the build backend defines a hook with this name, it will be called in a subprocess. If not, the backend will be asked to build an editable wheel, and the dist-info extracted from that (unless _allow_fallback is False). """ return self._call_hook('prepare_metadata_for_build_editable', { 'metadata_directory': abspath(metadata_directory), 'config_settings': config_settings, '_allow_fallback': _allow_fallback, }) def build_editable( self, wheel_directory, config_settings=None, metadata_directory=None): """Build an editable wheel from this project. Returns the name of the newly created file. In general, this will call the 'build_editable' hook in the backend. However, if that was previously called by 'prepare_metadata_for_build_editable', and the same metadata_directory is used, the previously built wheel will be copied to wheel_directory. """ if metadata_directory is not None: metadata_directory = abspath(metadata_directory) return self._call_hook('build_editable', { 'wheel_directory': abspath(wheel_directory), 'config_settings': config_settings, 'metadata_directory': metadata_directory, }) def get_requires_for_build_sdist(self, config_settings=None): """Identify packages required for building a wheel Returns a list of dependency specifications, e.g.:: ["setuptools >= 26"] This does not include requirements specified in pyproject.toml. It returns the result of calling the equivalently named hook in a subprocess. """ return self._call_hook('get_requires_for_build_sdist', { 'config_settings': config_settings }) def build_sdist(self, sdist_directory, config_settings=None): """Build an sdist from this project. Returns the name of the newly created file. This calls the 'build_sdist' backend hook in a subprocess. """ return self._call_hook('build_sdist', { 'sdist_directory': abspath(sdist_directory), 'config_settings': config_settings, }) def _call_hook(self, hook_name, kwargs): # On Python 2, pytoml returns Unicode values (which is correct) but the # environment passed to check_call needs to contain string values. We # convert here by encoding using ASCII (the backend can only contain # letters, digits and _, . and : characters, and will be used as a # Python identifier, so non-ASCII content is wrong on Python 2 in # any case). # For backend_path, we use sys.getfilesystemencoding. if sys.version_info[0] == 2: build_backend = self.build_backend.encode('ASCII') else: build_backend = self.build_backend extra_environ = {'PEP517_BUILD_BACKEND': build_backend} if self.backend_path: backend_path = os.pathsep.join(self.backend_path) if sys.version_info[0] == 2: backend_path = backend_path.encode(sys.getfilesystemencoding()) extra_environ['PEP517_BACKEND_PATH'] = backend_path with tempdir() as td: hook_input = {'kwargs': kwargs} compat.write_json(hook_input, pjoin(td, 'input.json'), indent=2) # Run the hook in a subprocess with _in_proc_script_path() as script: python = self.python_executable self._subprocess_runner( [python, abspath(str(script)), hook_name, td], cwd=self.source_dir, extra_environ=extra_environ ) data = compat.read_json(pjoin(td, 'output.json')) if data.get('unsupported'): raise UnsupportedOperation(data.get('traceback', '')) if data.get('no_backend'): raise BackendUnavailable(data.get('traceback', '')) if data.get('backend_invalid'): raise BackendInvalid( backend_name=self.build_backend, backend_path=self.backend_path, message=data.get('backend_error', '') ) if data.get('hook_missing'): raise HookMissing(data.get('missing_hook_name') or hook_name) return data['return_val'] class LoggerWrapper(threading.Thread): """ Read messages from a pipe and redirect them to a logger (see python's logging module). """ def __init__(self, logger, level): threading.Thread.__init__(self) self.daemon = True self.logger = logger self.level = level # create the pipe and reader self.fd_read, self.fd_write = os.pipe() self.reader = os.fdopen(self.fd_read) self.start() def fileno(self): return self.fd_write @staticmethod def remove_newline(msg): return msg[:-1] if msg.endswith(os.linesep) else msg def run(self): for line in self.reader: self._write(self.remove_newline(line)) def _write(self, message): self.logger.log(self.level, message)	13.11 KB	2026-01-07 23:39

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