Mini Shell
"""
Periodically update bundled versions.
"""
from __future__ import absolute_import, unicode_literals
import json
import logging
import os
import ssl
import subprocess
import sys
from datetime import datetime, timedelta
from itertools import groupby
from shutil import copy2
from textwrap import dedent
from threading import Thread
from six.moves.urllib.error import URLError
from six.moves.urllib.request import urlopen
from virtualenv.app_data import AppDataDiskFolder
from virtualenv.info import PY2
from virtualenv.util.path import Path
from virtualenv.util.subprocess import CREATE_NO_WINDOW, Popen
from ..wheels.embed import BUNDLE_SUPPORT
from ..wheels.util import Wheel
if PY2:
# on Python 2 datetime.strptime throws the error below if the import did not trigger on main thread
# Failed to import _strptime because the import lock is held by
try:
import _strptime # noqa
except ImportError: # pragma: no cov
pass # pragma: no cov
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(object):
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 "{}(filename={}), found_date={}, release_date={}, source={})".format(
self.__class__.__name__,
self.filename,
self.found_date,
self.release_date,
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(object):
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(str("_VIRTUALENV_PERIODIC_UPDATE_INLINE")) == str("1")
pipe = None if debug else subprocess.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 "=={}".format(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 "<{}".format(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() # noqa
_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, "https://pypi.org/pypi/{}/json".format(distribution)
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,
)
msg = "upgraded %s for python %s in %s {}".format(
"new entries found:\n%s" if versions else "no new versions found",
)
args = [
distribution,
for_py_version,
datetime.now() - start,
]
if versions:
args.append("\n".join("\t{}".format(v) for v in versions))
logging.warning(msg, *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",
)
Zerion Mini Shell 1.0