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"""Bootstrap""" import logging import sys import traceback from contextlib import contextmanager from pathlib import Path from subprocess import CalledProcessError from threading import Lock, Thread from virtualenv.info import fs_supports_symlink from virtualenv.seed.embed.base_embed import BaseEmbed from virtualenv.seed.wheels import get_wheel from .pip_install.copy import CopyPipInstall from .pip_install.symlink import SymlinkPipInstall class FromAppData(BaseEmbed): def __init__(self, options): super().__init__(options) self.symlinks = options.symlink_app_data @classmethod def add_parser_arguments(cls, parser, interpreter, app_data): super().add_parser_arguments(parser, interpreter, app_data) can_symlink = app_data.transient is False and fs_supports_symlink() sym = "" if can_symlink else "not supported - " parser.add_argument( "--symlink-app-data", dest="symlink_app_data", action="store_true" if can_symlink else "store_false", help=f"{sym} symlink the python packages from the app-data folder (requires seed pip>=19.3)", default=False, ) def run(self, creator): if not self.enabled: return with self._get_seed_wheels(creator) as name_to_whl: pip_version = name_to_whl["pip"].version_tuple if "pip" in name_to_whl else None installer_class = self.installer_class(pip_version) exceptions = {} def _install(name, wheel): try: logging.debug("install %s from wheel %s via %s", name, wheel, installer_class.__name__) key = Path(installer_class.__name__) / wheel.path.stem wheel_img = self.app_data.wheel_image(creator.interpreter.version_release_str, key) installer = installer_class(wheel.path, creator, wheel_img) parent = self.app_data.lock / wheel_img.parent with parent.non_reentrant_lock_for_key(wheel_img.name): if not installer.has_image(): installer.build_image() installer.install(creator.interpreter.version_info) except Exception: exceptions[name] = sys.exc_info() threads = [Thread(target=_install, args=(n, w)) for n, w in name_to_whl.items()] for thread in threads: thread.start() for thread in threads: thread.join() if exceptions: messages = [f"failed to build image {', '.join(exceptions.keys())} because:"] for value in exceptions.values(): exc_type, exc_value, exc_traceback = value messages.append("".join(traceback.format_exception(exc_type, exc_value, exc_traceback))) raise RuntimeError("\n".join(messages)) @contextmanager def _get_seed_wheels(self, creator): name_to_whl, lock, fail = {}, Lock(), {} def _get(distribution, version): for_py_version = creator.interpreter.version_release_str failure, result = None, None # fallback to download in case the exact version is not available for download in [True] if self.download else [False, True]: failure = None try: result = get_wheel( distribution=distribution, version=version, for_py_version=for_py_version, search_dirs=self.extra_search_dir, download=download, app_data=self.app_data, do_periodic_update=self.periodic_update, env=self.env, ) if result is not None: break except Exception as exception: logging.exception("fail") failure = exception if failure: if isinstance(failure, CalledProcessError): msg = f"failed to download {distribution}" if version is not None: msg += f" version {version}" msg += f", pip download exit code {failure.returncode}" output = failure.output + failure.stderr if output: msg += "\n" msg += output else: msg = repr(failure) logging.error(msg) with lock: fail[distribution] = version else: with lock: name_to_whl[distribution] = result threads = [ Thread(target=_get, args=(distribution, version)) for distribution, version in self.distribution_to_versions().items() ] for thread in threads: thread.start() for thread in threads: thread.join() if fail: raise RuntimeError(f"seed failed due to failing to download wheels {', '.join(fail.keys())}") yield name_to_whl def installer_class(self, pip_version_tuple): if self.symlinks and pip_version_tuple: # symlink support requires pip 19.3+ if pip_version_tuple >= (19, 3): return SymlinkPipInstall return CopyPipInstall def __repr__(self): msg = f", via={'symlink' if self.symlinks else 'copy'}, app_data_dir={self.app_data}" base = super().__repr__() return f"{base[:-1]}{msg}{base[-1]}" __all__ = [ "FromAppData", ]