name : periodic_update.py """ Periodically update bundled versions. """ import json import logging import os import ssl import sys from datetime import datetime, timedelta from itertools import groupby from pathlib import Path from shutil import copy2 from subprocess import PIPE, Popen from textwrap import dedent from threading import Thread from urllib.error import URLError from urllib.request import urlopen from virtualenv.app_data import AppDataDiskFolder from virtualenv.util.subprocess import CREATE_NO_WINDOW from ..wheels.embed import BUNDLE_SUPPORT from ..wheels.util import Wheel GRACE_PERIOD_CI = timedelta(hours=1) # prevent version switch in the middle of a CI run GRACE_PERIOD_MINOR = timedelta(days=28) UPDATE_PERIOD = timedelta(days=14) UPDATE_ABORTED_DELAY = timedelta(hours=1) def periodic_update(distribution, of_version, for_py_version, wheel, search_dirs, app_data, do_periodic_update, env): if do_periodic_update: handle_auto_update(distribution, for_py_version, wheel, search_dirs, app_data, env) now = datetime.now() def _update_wheel(ver): updated_wheel = Wheel(app_data.house / ver.filename) logging.debug("using %supdated wheel %s", "periodically " if updated_wheel else "", updated_wheel) return updated_wheel u_log = UpdateLog.from_app_data(app_data, distribution, for_py_version) if of_version is None: for _, group in groupby(u_log.versions, key=lambda v: v.wheel.version_tuple[0:2]): # use only latest patch version per minor, earlier assumed to be buggy all_patches = list(group) ignore_grace_period_minor = any(version for version in all_patches if version.use(now)) for version in all_patches: if wheel is not None and Path(version.filename).name == wheel.name: return wheel if version.use(now, ignore_grace_period_minor): return _update_wheel(version) else: for version in u_log.versions: if version.wheel.version == of_version: return _update_wheel(version) return wheel def handle_auto_update(distribution, for_py_version, wheel, search_dirs, app_data, env): embed_update_log = app_data.embed_update_log(distribution, for_py_version) u_log = UpdateLog.from_dict(embed_update_log.read()) if u_log.needs_update: u_log.periodic = True u_log.started = datetime.now() embed_update_log.write(u_log.to_dict()) trigger_update(distribution, for_py_version, wheel, search_dirs, app_data, periodic=True, env=env) def add_wheel_to_update_log(wheel, for_py_version, app_data): embed_update_log = app_data.embed_update_log(wheel.distribution, for_py_version) logging.debug("adding %s information to %s", wheel.name, embed_update_log.file) u_log = UpdateLog.from_dict(embed_update_log.read()) if any(version.filename == wheel.name for version in u_log.versions): logging.warning("%s already present in %s", wheel.name, embed_update_log.file) return # we don't need a release date for sources other than "periodic" version = NewVersion(wheel.name, datetime.now(), None, "download") u_log.versions.append(version) # always write at the end for proper updates embed_update_log.write(u_log.to_dict()) DATETIME_FMT = "%Y-%m-%dT%H:%M:%S.%fZ" def dump_datetime(value): return None if value is None else value.strftime(DATETIME_FMT) def load_datetime(value): return None if value is None else datetime.strptime(value, DATETIME_FMT) class NewVersion: def __init__(self, filename, found_date, release_date, source): self.filename = filename self.found_date = found_date self.release_date = release_date self.source = source @classmethod def from_dict(cls, dictionary): return cls( filename=dictionary["filename"], found_date=load_datetime(dictionary["found_date"]), release_date=load_datetime(dictionary["release_date"]), source=dictionary["source"], ) def to_dict(self): return { "filename": self.filename, "release_date": dump_datetime(self.release_date), "found_date": dump_datetime(self.found_date), "source": self.source, } def use(self, now, ignore_grace_period_minor=False, ignore_grace_period_ci=False): if self.source == "manual": return True elif self.source == "periodic": if self.found_date < now - GRACE_PERIOD_CI or ignore_grace_period_ci: if not ignore_grace_period_minor: compare_from = self.release_date or self.found_date return now - compare_from >= GRACE_PERIOD_MINOR return True return False def __repr__(self): return ( f"{self.__class__.__name__}(filename={self.filename}), found_date={self.found_date}, " f"release_date={self.release_date}, source={self.source})" ) def __eq__(self, other): return type(self) == type(other) and all( getattr(self, k) == getattr(other, k) for k in ["filename", "release_date", "found_date", "source"] ) def __ne__(self, other): return not (self == other) @property def wheel(self): return Wheel(Path(self.filename)) class UpdateLog: def __init__(self, started, completed, versions, periodic): self.started = started self.completed = completed self.versions = versions self.periodic = periodic @classmethod def from_dict(cls, dictionary): if dictionary is None: dictionary = {} return cls( load_datetime(dictionary.get("started")), load_datetime(dictionary.get("completed")), [NewVersion.from_dict(v) for v in dictionary.get("versions", [])], dictionary.get("periodic"), ) @classmethod def from_app_data(cls, app_data, distribution, for_py_version): raw_json = app_data.embed_update_log(distribution, for_py_version).read() return cls.from_dict(raw_json) def to_dict(self): return { "started": dump_datetime(self.started), "completed": dump_datetime(self.completed), "periodic": self.periodic, "versions": [r.to_dict() for r in self.versions], } @property def needs_update(self): now = datetime.now() if self.completed is None: # never completed return self._check_start(now) else: if now - self.completed <= UPDATE_PERIOD: return False return self._check_start(now) def _check_start(self, now): return self.started is None or now - self.started > UPDATE_ABORTED_DELAY def trigger_update(distribution, for_py_version, wheel, search_dirs, app_data, env, periodic): wheel_path = None if wheel is None else str(wheel.path) cmd = [ sys.executable, "-c", dedent( """ from virtualenv.report import setup_report, MAX_LEVEL from virtualenv.seed.wheels.periodic_update import do_update setup_report(MAX_LEVEL, show_pid=True) do_update({!r}, {!r}, {!r}, {!r}, {!r}, {!r}) """, ) .strip() .format(distribution, for_py_version, wheel_path, str(app_data), [str(p) for p in search_dirs], periodic), ] debug = env.get("_VIRTUALENV_PERIODIC_UPDATE_INLINE") == "1" pipe = None if debug else PIPE kwargs = {"stdout": pipe, "stderr": pipe} if not debug and sys.platform == "win32": kwargs["creationflags"] = CREATE_NO_WINDOW process = Popen(cmd, **kwargs) logging.info( "triggered periodic upgrade of %s%s (for python %s) via background process having PID %d", distribution, "" if wheel is None else f"=={wheel.version}", for_py_version, process.pid, ) if debug: process.communicate() # on purpose not called to make it a background process def do_update(distribution, for_py_version, embed_filename, app_data, search_dirs, periodic): versions = None try: versions = _run_do_update(app_data, distribution, embed_filename, for_py_version, periodic, search_dirs) finally: logging.debug("done %s %s with %s", distribution, for_py_version, versions) return versions def _run_do_update(app_data, distribution, embed_filename, for_py_version, periodic, search_dirs): from virtualenv.seed.wheels import acquire wheel_filename = None if embed_filename is None else Path(embed_filename) embed_version = None if wheel_filename is None else Wheel(wheel_filename).version_tuple app_data = AppDataDiskFolder(app_data) if isinstance(app_data, str) else app_data search_dirs = [Path(p) if isinstance(p, str) else p for p in search_dirs] wheelhouse = app_data.house embed_update_log = app_data.embed_update_log(distribution, for_py_version) u_log = UpdateLog.from_dict(embed_update_log.read()) now = datetime.now() update_versions, other_versions = [], [] for version in u_log.versions: if version.source in {"periodic", "manual"}: update_versions.append(version) else: other_versions.append(version) if periodic: source = "periodic" else: source = "manual" # mark the most recent one as source "manual" if update_versions: update_versions[0].source = source if wheel_filename is not None: dest = wheelhouse / wheel_filename.name if not dest.exists(): copy2(str(wheel_filename), str(wheelhouse)) last, last_version, versions, filenames = None, None, [], set() while last is None or not last.use(now, ignore_grace_period_ci=True): download_time = datetime.now() dest = acquire.download_wheel( distribution=distribution, version_spec=None if last_version is None else f"<{last_version}", for_py_version=for_py_version, search_dirs=search_dirs, app_data=app_data, to_folder=wheelhouse, env=os.environ, ) if dest is None or (update_versions and update_versions[0].filename == dest.name): break release_date = release_date_for_wheel_path(dest.path) last = NewVersion(filename=dest.path.name, release_date=release_date, found_date=download_time, source=source) logging.info("detected %s in %s", last, datetime.now() - download_time) versions.append(last) filenames.add(last.filename) last_wheel = last.wheel last_version = last_wheel.version if embed_version is not None: if embed_version >= last_wheel.version_tuple: # stop download if we reach the embed version break u_log.periodic = periodic if not u_log.periodic: u_log.started = now # update other_versions by removing version we just found other_versions = [version for version in other_versions if version.filename not in filenames] u_log.versions = versions + update_versions + other_versions u_log.completed = datetime.now() embed_update_log.write(u_log.to_dict()) return versions def release_date_for_wheel_path(dest): wheel = Wheel(dest) # the most accurate is to ask PyPi - e.g. https://pypi.org/pypi/pip/json, # see https://warehouse.pypa.io/api-reference/json/ for more details content = _pypi_get_distribution_info_cached(wheel.distribution) if content is not None: try: upload_time = content["releases"][wheel.version][0]["upload_time"] return datetime.strptime(upload_time, "%Y-%m-%dT%H:%M:%S") except Exception as exception: logging.error("could not load release date %s because %r", content, exception) return None def _request_context(): yield None # fallback to non verified HTTPS (the information we request is not sensitive, so fallback) yield ssl._create_unverified_context() _PYPI_CACHE = {} def _pypi_get_distribution_info_cached(distribution): if distribution not in _PYPI_CACHE: _PYPI_CACHE[distribution] = _pypi_get_distribution_info(distribution) return _PYPI_CACHE[distribution] def _pypi_get_distribution_info(distribution): content, url = None, f"https://pypi.org/pypi/{distribution}/json" try: for context in _request_context(): try: with urlopen(url, context=context) as file_handler: content = json.load(file_handler) break except URLError as exception: logging.error("failed to access %s because %r", url, exception) except Exception as exception: logging.error("failed to access %s because %r", url, exception) return content def manual_upgrade(app_data, env): threads = [] for for_py_version, distribution_to_package in BUNDLE_SUPPORT.items(): # load extra search dir for the given for_py for distribution in distribution_to_package.keys(): thread = Thread(target=_run_manual_upgrade, args=(app_data, distribution, for_py_version, env)) thread.start() threads.append(thread) for thread in threads: thread.join() def _run_manual_upgrade(app_data, distribution, for_py_version, env): start = datetime.now() from .bundle import from_bundle current = from_bundle( distribution=distribution, version=None, for_py_version=for_py_version, search_dirs=[], app_data=app_data, do_periodic_update=False, env=env, ) logging.warning( "upgrade %s for python %s with current %s", distribution, for_py_version, "" if current is None else current.name, ) versions = do_update( distribution=distribution, for_py_version=for_py_version, embed_filename=current.path, app_data=app_data, search_dirs=[], periodic=False, ) args = [ distribution, for_py_version, datetime.now() - start, ] if versions: args.append("\n".join(f"\t{v}" for v in versions)) ver_update = "new entries found:\n%s" if versions else "no new versions found" logging.warning(f"upgraded %s for python %s in %s {ver_update}", *args) __all__ = [ "add_wheel_to_update_log", "periodic_update", "do_update", "manual_upgrade", "NewVersion", "UpdateLog", "load_datetime", "dump_datetime", "trigger_update", "release_date_for_wheel_path", ]