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# Byte-compiled / optimized / DLL files
__pycache__/
*.py[cod]
*$py.class
# C extensions
*.so
# Distribution / packaging
.Python
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
wheels/
share/python-wheels/
*.egg-info/
.installed.cfg
*.egg
MANIFEST
# PyInstaller
# Usually these files are written by a python script from a template
# before PyInstaller builds the exe, so as to inject date/other infos into it.
*.manifest
*.spec
# Installer logs
pip-log.txt
pip-delete-this-directory.txt
# Unit test / coverage reports
htmlcov/
.tox/
.nox/
.coverage
.coverage.*
.cache
nosetests.xml
coverage.xml
*.cover
*.py,cover
.hypothesis/
.pytest_cache/
cover/
# Translations
*.mo
*.pot
# Django stuff:
*.log
local_settings.py
db.sqlite3
db.sqlite3-journal
# Flask stuff:
instance/
.webassets-cache
# Scrapy stuff:
.scrapy
# Sphinx documentation
docs/_build/
# PyBuilder
.pybuilder/
target/
# Jupyter Notebook
.ipynb_checkpoints
# IPython
profile_default/
ipython_config.py
# pyenv
# For a library or package, you might want to ignore these files since the code is
# intended to run in multiple environments; otherwise, check them in:
# .python-version
# pipenv
# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
# However, in case of collaboration, if having platform-specific dependencies or dependencies
# having no cross-platform support, pipenv may install dependencies that don't work, or not
# install all needed dependencies.
#Pipfile.lock
# PEP 582; used by e.g. github.com/David-OConnor/pyflow
__pypackages__/
# Celery stuff
celerybeat-schedule
celerybeat.pid
# SageMath parsed files
*.sage.py
# Environments
.env
.venv
env/
venv/
ENV/
env.bak/
venv.bak/
# Spyder project settings
.spyderproject
.spyproject
# Rope project settings
.ropeproject
# mkdocs documentation
/site
# mypy
.mypy_cache/
.dmypy.json
dmypy.json
# Pyre type checker
.pyre/
# pytype static type analyzer
.pytype/
# Cython debug symbols
cython_debug/

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GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
{one line to give the program's name and a brief idea of what it does.}
Copyright (C) {year} {name of author}
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
{project} Copyright (C) {year} {fullname}
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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# Pacroller
W.I.P.

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import setuptools
with open("README.md", "r", encoding="utf-8") as fh:
long_description = fh.read()
setuptools.setup(
name="pacroller",
version="0.0.1",
author="Jerry Xiao",
author_email="pacroller@mail.jerryxiao.cc",
description="unattended pacman upgrade for archlinux",
long_description=long_description,
long_description_content_type="text/markdown",
url="https://github.com/isjerryxiao/pacroller",
packages=setuptools.find_packages('src'),
package_dir={'': 'src'},
classifiers=[
"Development Status :: 3 - Alpha"
"Programming Language :: Python :: 3",
"License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
"Operating System :: POSIX :: Linux",
],
python_requires='>=3.8',
entry_points={
'console_scripts': [
'pacroller=pacroller.main:main'
]
},
install_requires=['pyalpm']
)

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import logging
from typing import List, Tuple, Dict
from pathlib import Path
from re import compile, Pattern, match
from pacroller.utils import pacman_time_to_timestamp
from pacroller.known_output import KNOWN_HOOK_OUTPUT, KNOWN_PACKAGE_OUTPUT
from pacroller.config import IGNORED_PACNEW
from time import ctime, time
logger = logging.getLogger()
REGEX = {
's_process_pkg_changes': r':: Processing package changes\.\.\.',
's_post-transaction': r':: Running post-transaction hooks\.\.\.$',
's_optdepend': r'(?i)(?:new )?optional dependencies for (.+)$',
's_optdepend_list': r' (.+): (?:.+)',
's_upgrade_pkg': r'upgrading (.+)\.\.\.',
'l_running_hook': r'running \'(.+)\'\.\.\.',
'l_transaction_start': r'transaction started',
'l_transaction_complete': r'transaction completed',
'l_upgrade': r'upgraded (.+) \((.+) -> (.+)\)',
'l_install': r'installed (.+) \((.+)\)',
'l_remove': r'removed (.+) \((.+)\)',
'l_pacnew': r'warning: (.+) installed as (.+\.pacnew)',
}
for k, v in REGEX.items():
REGEX[k] = compile(v)
REGEX: Dict[str, Pattern] # get through lint
class checkReport:
def __init__(self, info: List[str] = None, warn: List[str] = None,
crit: List[str] = None, changes: List[Tuple[str]] = None,
date: int = int(time)) -> None:
self._info = info or list()
self._warn = warn or list()
self._crit = crit or list()
self._changes = changes or list()
self._date = date
def to_dict(self) -> dict:
return {'info': self._info, 'warn': self._warn, 'crit': self._crit, 'changes': self._changes, 'date': self._date}
def summary(self, verbose=True, show_package=False, indent=2) -> str:
ret = [f"Pacroller Report at {ctime(self._date)}",]
if self._crit:
ret.append("Collected Errors:")
ret.extend([" " * indent + i for i in self._crit])
if self._warn:
ret.append("Collected Warnings:")
ret.extend([" " * indent + i for i in self._warn])
if verbose and self._info:
ret.append("Collected Info:")
ret.extend([" " * indent + i for i in self._info])
if show_package:
pkg_ret = list()
installed = list()
upgraded = list()
removed = list()
for c in self._changes:
name, old, new = c
if old and new:
upgraded.append(c)
elif old is None:
installed.append(c)
elif new is None:
removed.append(c)
else:
raise RuntimeError(f"{c=}")
if verbose:
for c in upgraded:
name, old, new = c
pkg_ret.append(f'upgrade {name} from {old} to {new}')
for c in installed:
name, _, new = c
pkg_ret.append(f'install {name} {new}')
for c in removed:
name, old, _ = c
pkg_ret.append(f'remove {name} {old}')
else:
up, ins, rem = [[c[0] for c in x] for x in (upgraded, installed, removed)]
if up:
pkg_ret.append(f'upgrade: {" ".join(up)}')
if ins:
pkg_ret.append(f'install: {" ".join(ins)}')
if rem:
pkg_ret.append(f'remove: {" ".join(rem)}')
if pkg_ret:
ret.append("Package changes:")
ret.extend([" " * indent + i for i in pkg_ret])
if len(ret) == 1:
ret.append('all systems go')
return "\n".join(ret)
def info(self, text: str) -> None:
logger.debug(f'report info {text}')
self._info.append(text)
def warn(self, text: str) -> None:
logger.debug(f'report warn {text}')
self._warn.append(text)
def crit(self, text: str) -> None:
logger.debug(f'report crit {text}')
self._crit.append(text)
def change(self, name: str, old: str, new: str) -> None:
logger.debug(f'report change {name=} {old=} {new=}')
self._changes.append((name, old, new))
def log_checker(stdout: List[str], log: List[str], debug=False) -> checkReport:
if debug:
Path('/tmp/pacroller-stdout.log').write_text('\n'.join(stdout))
Path('/tmp/pacroller-pacman.log').write_text('\n'.join(log))
report = checkReport()
_stdout_parser(stdout, report)
_log_parser(log, report)
return report
def _stdout_parser(stdout: List[str], report: checkReport) -> None:
ln = 0
in_package_change = False
while ln < len(stdout):
line = stdout[ln]
if REGEX['s_process_pkg_changes'].match(line):
in_package_change = True
ln += 1
continue
elif REGEX['s_post-transaction'].match(line):
in_package_change = False
# we don't care anything below this
logger.debug(f'break {line=}')
break
if in_package_change:
if _m := REGEX['s_optdepend'].match(line):
logger.debug(f'optdepend start {line=}')
pkg = _m.groups()[0]
optdeps = list()
while True:
ln += 1
line = stdout[ln]
if _m := REGEX['s_optdepend_list'].match(line):
logger.debug(f'optdepend found {line=}')
optdeps.append(_m.groups()[0])
else:
logger.debug(f'optdepend end {line=}')
ln -= 1
break
report.info(f'new optional dependencies for {pkg}: {", ".join(optdeps)}')
else:
# then it should be upgrade message
if _m := REGEX['s_upgrade_pkg'].match(line):
logger.debug(f's_upgrade_pkg {line=}')
else:
report.crit(f'{line=} is unknown')
else:
logger.debug(f'skip {line=}')
ln += 1
def _split_log_line(line: str) -> Tuple[int, str, str]:
(time, source, msg) = line.split(' ', maxsplit=2)
time: int = pacman_time_to_timestamp(time.strip('[]'))
source = source.strip('[]')
return (time, source, msg)
def _log_parser(log: List[str], report: checkReport) -> None:
# preprocess
if log[-1] == '':
log = log[:-1]
nlog = list()
for line in log:
try:
_split_log_line(line)
nlog.append(line)
except Exception:
logger.debug(f"preprocess logs: should not be on a new line, {line=}")
assert nlog
nlog[-1] = f"{nlog[-1]} {line}"
log = nlog
ln = 0
in_transaction = 0
while ln < len(log):
line = log[ln]
(_, source, msg) = _split_log_line(line)
if source == 'PACMAN':
pass # nothing concerning here
elif source == 'ALPM':
if _m := REGEX['l_upgrade'].match(msg):
report.change(*(_m.groups()))
elif _m := REGEX['l_install'].match(msg):
name, new = _m.groups()
report.change(name, None, new)
elif _m := REGEX['l_remove'].match(msg):
name, old = _m.groups()
report.change(name, old, None)
elif REGEX['l_transaction_start'].match(msg):
logger.debug('transaction_start')
if in_transaction == 0:
in_transaction = 1
else:
report.crit(f'{ln=} duplicate transaction_start')
elif REGEX['l_transaction_complete'].match(msg):
logger.debug('transaction_complete')
if in_transaction == 1:
in_transaction = 2
else:
report.crit(f'{ln=} transaction_complete while {in_transaction=}')
elif _m := REGEX['l_pacnew'].match(msg):
orig, _ = _m.groups()
if orig in IGNORED_PACNEW:
logger.debug(f'pacnew ignored for {orig}')
else:
report.warn(f'please merge pacnew for {orig}')
elif _m := REGEX['l_running_hook'].match(msg):
hook_name = _m.groups()[0]
logger.debug(f'hook start {hook_name=}')
while True:
ln += 1
if ln >= len(log):
logger.debug(f'hook end {hook_name=} {msg=}')
ln -= 1
break
line = log[ln]
(_, source, msg) = _split_log_line(line)
if source == 'ALPM-SCRIPTLET':
for r in (*(KNOWN_HOOK_OUTPUT.get('', [])), *(KNOWN_HOOK_OUTPUT.get(hook_name, []))):
if match(r, msg):
logger.debug(f'hook output match {hook_name=} {msg=} {r=}')
break
else:
report.warn(f'hook {hook_name} says {msg}')
else:
logger.debug(f'hook end {hook_name=} {msg=}')
ln -= 1
break
else:
report.crit(f'ALPM {line=} is unknown')
elif source == 'ALPM-SCRIPTLET':
(_, _, _pmsg) = _split_log_line(log[ln-1])
if _m := REGEX['s_upgrade_pkg'].match(_pmsg):
pkg, *_ = _m.groups()
elif _m := REGEX['l_install'].match(_pmsg):
pkg, *_ = _m.groups()
elif _m := REGEX['l_remove'].match(_pmsg):
pkg, *_ = _m.groups()
else:
report.crit(f'{line=} has unknown SCRIPTLET output')
logger.debug(f'.install start {pkg=}')
while True:
ln += 1
line = log[ln]
(_, source, msg) = _split_log_line(line)
if source == 'ALPM-SCRIPTLET':
for r in (*(KNOWN_PACKAGE_OUTPUT.get('', [])), *(KNOWN_PACKAGE_OUTPUT.get(pkg, []))):
if match(r, msg):
logger.debug(f'.install output match {pkg=} {msg=} {r=}')
break
else:
report.warn(f'package {pkg} says {msg}')
else:
logger.debug(f'.install end {pkg=} {msg=}')
ln -= 1
break
else:
report.crit(f'{line=} has unknown source')
ln += 1
def sync_err_is_net(output: str) -> bool:
''' check if a sync failure is caused by network '''
output = output.strip().split('\n')
if output[-1] == 'error: failed to synchronize all databases':
return True
else:
return False
def upgrade_err_is_net(output: str) -> bool:
''' check if an upgrade failure is caused by network '''
output = output.strip().split('\n')
if len(output) >= 2 and 'warning: failed to retrieve some files' in output and \
'error: failed to commit transaction (failed to retrieve some files)' in output:
return True
else:
return False
if __name__ == '__main__':
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(module)s - %(funcName)s - %(levelname)s - %(message)s')
stdout = Path('/tmp/pacroller-stdout.log').read_text().split('\n')
log = Path('/tmp/pacroller-pacman.log').read_text().split('\n')
report = checkReport()
_stdout_parser(stdout, report)
_log_parser(log, report)
print(report.to_dict())
print(report.summary(show_package=True, verbose=True))

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{
"upgrade_timeout": 3600,
"network_retry": 5,
"custom_sync": false,
"sync_shell": "sync.sh",
"extra_safe": false,
"shell": "/bin/bash",
"hold": {
"linux": "(.*)",
"python": "[0-9]+[.]([0-9]+)[.][0-9]+[-][0-9]+"
}
'ignored_pacnew': [
'/etc/locale.gen',
'/etc/pacman.d/mirrorlist'
]
}

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import json
from pathlib import Path
CONFIG_DIR = Path('/etc/pacroller')
CONFIG_FILE = 'config.json'
LIB_DIR = Path('/var/lib/pacroller')
DB_FILE = 'db'
PACMAN_CONFIG = '/etc/pacman.conf'
PACMAN_LOG = '/var/log/pacman.log'
assert LIB_DIR.is_dir()
if (cfg := (CONFIG_DIR / CONFIG_FILE)).exists():
_config: dict = json.loads(cfg.read_text())
else:
_config = dict()
UPGRADE_TIMEOUT = int(_config.get('upgrade_timeout', 3600))
NETWORK_RETRY = int(_config.get('network_retry', 5))
assert UPGRADE_TIMEOUT > 0 and NETWORK_RETRY > 0
CUSTOM_SYNC = bool(_config.get('custom_sync', False))
SYNC_SH = CONFIG_DIR / str(_config.get('sync_shell', "sync.sh"))
if CUSTOM_SYNC:
assert SYNC_SH.exists()
EXTRA_SAFE = bool(_config.get('extra_safe', False))
SHELL = str(_config.get('shell', '/bin/bash'))
HOLD = _config.get('hold', dict())
for (k, v) in HOLD:
assert isinstance(k, str) and isinstance(v, str)
IGNORED_PACNEW = _config.get('ignored_pacnew', list())
assert isinstance(IGNORED_PACNEW, list)

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KNOWN_HOOK_OUTPUT = {
'': [],
'20-systemd-sysusers.hook': [
r'(?i)creating group .+',
r'(?i)creating user .+',
],
'30-systemd-sysctl.hook': [
r'Not setting (.+) \(explicit setting exists\)\.',
],
'90-mkinitcpio-install.hook': [
r'==> Building image from preset: .+',
r'==> Starting build: .+',
r'==> WARNING: Possibly missing firmware for module: .+',
r'==> Generating module dependencies',
r'==> Creating (?:.+)-compressed initcpio image: .+',
r'==> Image generation successful.*',
r'[ ]+-> .+',
]
}
_keyring_output = [
r'==> Appending keys from .+',
r'==> Locally signing trusted keys in keyring\.\.\.',
r'==> Importing owner trust values\.\.\.',
r'==> Disabling revoked keys in keyring\.\.\.',
r'==> Updating trust database\.\.\.',
r'gpg: next trustdb check due at .+',
r'gpg: public key .+ is .+ than the signature',
r'gpg: Warning: using insecure memory!',
r'[ ]+-> .+',
]
KNOWN_PACKAGE_OUTPUT = {
'': [],
'archlinux-keyring': _keyring_output,
'archlinuxcn-keyring': [
*_keyring_output,
r'gpg: marginals needed:.+ completes needed:.+ trust model: pgp',
r'gpg: depth:.+ valid:.+ signed:.+ trust:.+, .+, .+, .+, .+, .+',
]
}

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#!/usr/bin/python
from pathlib import Path
import subprocess
import logging
from re import match
import json
from os import environ
import traceback
import pyalpm
import pycman
from typing import List, Iterator
from pacroller.utils import execute_with_io, UnknownQuestionError, back_readline
from pacroller.checker import log_checker, sync_err_is_net, upgrade_err_is_net, checkReport
from pacroller.config import (CONFIG_DIR, CONFIG_FILE, LIB_DIR, DB_FILE, PACMAN_LOG, PACMAN_CONFIG,
UPGRADE_TIMEOUT, NETWORK_RETRY, CUSTOM_SYNC, SYNC_SH, EXTRA_SAFE, SHELL, HOLD)
logger = logging.getLogger()
environ['LANG'] = 'en_US.utf8' # required for parsing
class NonFatal(Exception):
pass
class SyncRetry(NonFatal):
pass
class MaxRetryReached(NonFatal):
pass
class PackageHold(Exception):
pass
class CheckFailed(Exception):
pass
def sync() -> None:
logger.info('sync start')
if CUSTOM_SYNC:
sync_cmd = [SHELL, SYNC_SH.resolve()]
else:
sync_cmd = ['pacman', '-Sy', '--noprogressbar', '--color', 'never']
try:
p = subprocess.run(
sync_cmd,
stdin=subprocess.DEVNULL,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
encoding='utf-8',
timeout=300
)
except subprocess.CalledProcessError as e:
if sync_err_is_net(e.output):
logger.warning('unable to download databases')
raise SyncRetry()
else:
logger.exception(f'sync failed with {e.returncode=} {e.output=}')
raise
else:
logger.debug(f'sync {p.stdout=}')
logger.info('sync end')
class alpmCallback:
@staticmethod
def noop() -> None:
pass
def setup_hdl(self, handle: pyalpm.Handle) -> None:
handle.dlcb = self.noop
handle.eventcb = self.noop
handle.questioncb = self.noop
handle.progresscb = self.noop
def upgrade() -> List[str]:
logger.info('upgrade start')
handle = pycman.config.init_with_config(PACMAN_CONFIG)
localdb = handle.get_localdb()
alpmCallback().setup_hdl(handle)
t = handle.init_transaction()
try:
t.sysupgrade(False) # no downgrade
if len(t.to_add) + len(t.to_remove) == 0:
logger.info('upgrade end, nothing to do')
else:
def examine_upgrade(toadd: List[pyalpm.Package], toremove: List[pyalpm.Package]) -> None:
for pkg in toadd:
localpkg: pyalpm.Package = localdb.get_pkg(pkg.name)
localver = localpkg.version if localpkg else ""
logger.debug(f"will upgrade {pkg.name} from {localver} to {pkg.version}")
if _testreg := HOLD.get(pkg.name):
_m_old = match(_testreg, localver)
_m_new = match(_testreg, pkg.version)
if _m_old and _m_new:
if (o := _m_old.groups()) != (n := _m_new.groups()):
raise PackageHold(f"hold package {pkg.name} is going to be upgraded from {o=} to {n=}")
else:
raise PackageHold(f"cannot match version regex for hold package {pkg.name}")
for pkg in toremove:
logger.debug(f"will remove {pkg.name} version {pkg.version}")
if pkg.name in HOLD:
raise PackageHold(f"attempt to remove {pkg.name} which is set to hold")
examine_upgrade(t.to_add, t.to_remove)
finally:
t.release()
pacman_output = execute_with_io(['pacman', '-Su', '--noprogressbar', '--color', 'never'])
logger.info('upgrade end')
return pacman_output
def do_system_upgrade(debug=False) -> checkReport:
for _ in range(NETWORK_RETRY):
try:
sync()
except SyncRetry:
pass
else:
break
else:
raise MaxRetryReached(f'sync failed {NETWORK_RETRY} times')
for _ in range(NETWORK_RETRY):
try:
with open(PACMAN_LOG, 'r') as pacman_log:
log_anchor = pacman_log.seek(0, 2)
stdout = upgrade()
except subprocess.CalledProcessError as e:
if upgrade_err_is_net(e.output):
logger.warning('upgrade download failed')
else:
raise
else:
break
else:
raise MaxRetryReached(f'upgrade failed {NETWORK_RETRY} times')
with open(PACMAN_LOG, 'r') as pacman_log:
pacman_log.seek(log_anchor)
log = pacman_log.read().split('\n')
report = log_checker(stdout, log, debug=debug)
logger.info(report.summary(verbose=True, show_package=False))
return report
def write_db(report: checkReport, error: Exception = None) -> None:
with open(LIB_DIR / DB_FILE, 'a') as db:
db.write(json.dumps({'error': repr(error) if error else None, 'report': report.to_dict() if report else None}))
db.write("\n")
def read_db() -> Iterator[dict]:
if not (LIB_DIR / DB_FILE).exists():
(LIB_DIR / DB_FILE).touch()
with open(LIB_DIR / DB_FILE, 'rb') as db:
for line in back_readline(db):
if line:
entry = json.loads(line)
yield entry
def has_previous_error() -> Exception:
for entry in read_db():
return entry.get('error')
else:
return None
def main() -> None:
import argparse
parser = argparse.ArgumentParser(description='Pacman Automatic Rolling Helper')
parser.add_argument('action', choices=['run', 'status', 'fail-reset'])
parser.add_argument('-d', '--debug', action='store_true', help='enable debug mode')
parser.add_argument('-v', '--verbose', action='store_true', help='show verbose report')
parser.add_argument('-m', '--max', type=int, default=1, help='Number of upgrades to show')
args = parser.parse_args()
if args.debug:
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(module)s - %(funcName)s - %(levelname)s - %(message)s')
else:
logging.basicConfig(level=logging.INFO, format='%(levelname)s - %(message)s')
if args.action == 'run':
if prev_err := has_previous_error():
logger.error(f'Cannot continue, a previous error {prev_err} is still present. Please resolve this issue and run fail-reset.')
else:
try:
report = do_system_upgrade(args.debug)
except NonFatal:
raise
except Exception as e:
write_db(None, e)
raise
else:
exc = None
if EXTRA_SAFE:
if report._info or report._warn or report._crit:
exc = CheckFailed('manual inspection required')
else:
if report._warn or report._crit:
exc = CheckFailed('manual inspection required')
write_db(report, exc)
elif args.action == 'status':
count = 0
for entry in read_db():
if report_dict := entry.get('report'):
count += 1
report = checkReport(**report_dict)
print(report.summary(verbose=args.verbose, show_package=True))
if count >= args.max:
break
print()
elif args.action == 'fail-reset':
if prev_err := has_previous_error():
write_db(None)
logger.info(f'reset previous error {prev_err}')
else:
logger.warning('nothing to do')
if __name__ == '__main__':
main()

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import subprocess
from threading import Thread
import logging
from typing import List, BinaryIO, Iterator
from io import DEFAULT_BUFFER_SIZE
from time import mktime
from datetime import datetime
logger = logging.getLogger()
class UnknownQuestionError(subprocess.SubprocessError):
def __init__(self, question, output=None):
self.question = question
self.output = output
def __str__(self):
return f"Pacman returned an unknown question {self.question}"
def execute_with_io(command: List[str]) -> List[str]:
'''
captures stdout and stderr and
automatically handles [y/n] questions of pacman
'''
def terminate(p: subprocess.Popen, timeout: int = 30) -> None:
p.terminate()
try:
p.wait(timeout=30)
except subprocess.TimeoutExpired:
logger.critical(f'unable to terminate {p}, killing')
p.kill()
def set_timeout(p: subprocess.Popen, timeout: int) -> None:
try:
p.wait(timeout=timeout)
except subprocess.TimeoutExpired:
logger.exception(f'{timeout=} expired for {p}, terminating')
terminate(p)
else:
logger.debug('set_timeout exit')
p = subprocess.Popen(
command,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
encoding='utf-8'
)
Thread(target=set_timeout, args=(p, 3600), daemon=True).start() # should be configurable
line = ''
output = ''
while (r := p.stdout.read(1)) != '':
output += r
line += r
if r == '\n':
logger.debug('STDOUT: %s', line[:-1])
line = ''
elif r == ']':
if line == ':: Proceed with installation? [Y/n]':
p.stdin.write('y\n')
p.stdin.flush()
elif line.lower().endswith('[y/n]'):
terminate(p)
raise UnknownQuestionError(line, output)
if (ret := p.wait()) != 0:
raise subprocess.CalledProcessError(ret, command, output)
return output.split('\n')
def pacman_time_to_timestamp(stime: str) -> int:
''' the format pacman is using seems to be not iso compatible '''
dt = datetime.strptime(stime, "%Y-%m-%dT%H:%M:%S%z")
return mktime(dt.astimezone().timetuple())
def back_readline(fp: BinaryIO) -> Iterator[str]:
pos = fp.seek(0, 2)
if pos == 0:
return
previous = b''
while pos > 0:
next = max(pos - DEFAULT_BUFFER_SIZE, 0)
fp.seek(next)
got = fp.read(pos - next)
got = got + previous
blines = got.split(b'\n')
while len(blines) > 1:
yield blines.pop(-1).decode('utf-8')
previous = blines[0]
pos = next
yield blines.pop(-1).decode('utf-8')