commit 07dc1927cf4a207de75cc1fe09c15d397da5eafb Author: JustAnotherArchivist Date: Thu Jun 18 03:24:00 2020 +0000 Initial commit A significant part of this code (e.g. the module loading, HTTP retrieval, CLI) was mostly or entirely copied from snscrape. diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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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 +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..a80c529 --- /dev/null +++ b/README.md @@ -0,0 +1,11 @@ +# codearchiver +codearchiver is a tool for archiving version control system repositories and associated data like issues, pull requests, or releases. + +No documentation or detailed description exists at this time. + +## License +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 . diff --git a/codearchiver/__init__.py b/codearchiver/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/codearchiver/cli.py b/codearchiver/cli.py new file mode 100644 index 0000000..7e71b09 --- /dev/null +++ b/codearchiver/cli.py @@ -0,0 +1,195 @@ +import argparse +import contextlib +import datetime +import inspect +import logging +import requests.models +# Imported in parse_args() and main() after setting up the logger: +#import codearchiver.core +#import codearchiver.modules +#import codearchiver.version +import tempfile + + +## Logging +dumpLocals = False +logger = logging # Replaced below after setting the logger class + + +class Logger(logging.Logger): + def _log_with_stack(self, level, *args, **kwargs): + super().log(level, *args, **kwargs) + if dumpLocals: + stack = inspect.stack() + if len(stack) >= 3: + name = _dump_stack_and_locals(stack[2:][::-1]) + super().log(level, f'Dumped stack and locals to {name}') + + def warning(self, *args, **kwargs): + self._log_with_stack(logging.WARNING, *args, **kwargs) + + def error(self, *args, **kwargs): + self._log_with_stack(logging.ERROR, *args, **kwargs) + + def critical(self, *args, **kwargs): + self._log_with_stack(logging.CRITICAL, *args, **kwargs) + + def log(self, level, *args, **kwargs): + if level >= logging.WARNING: + self._log_with_stack(level, *args, **kwargs) + else: + super().log(level, *args, **kwargs) + + +def _requests_preparedrequest_repr(name, request): + ret = [] + ret.append(repr(request)) + ret.append(f'\n {name}.method = {request.method}') + ret.append(f'\n {name}.url = {request.url}') + ret.append(f'\n {name}.headers = \\') + for field in request.headers: + ret.append(f'\n {field} = {_repr("_", request.headers[field])}') + if request.body: + ret.append(f'\n {name}.body = ') + ret.append(_repr('_', request.body).replace('\n', '\n ')) + return ''.join(ret) + + +def _requests_response_repr(name, response, withHistory = True): + ret = [] + ret.append(repr(response)) + ret.append(f'\n {name}.url = {response.url}') + ret.append(f'\n {name}.request = ') + ret.append(_repr('_', response.request).replace('\n', '\n ')) + if withHistory and response.history: + ret.append(f'\n {name}.history = [') + for previousResponse in response.history: + ret.append(f'\n ') + ret.append(_requests_response_repr('_', previousResponse, withHistory = False).replace('\n', '\n ')) + ret.append('\n ]') + ret.append(f'\n {name}.status_code = {response.status_code}') + ret.append(f'\n {name}.headers = \\') + for field in response.headers: + ret.append(f'\n {field} = {_repr("_", response.headers[field])}') + ret.append(f'\n {name}.content = {_repr("_", response.content)}') + return ''.join(ret) + + +def _repr(name, value): + if type(value) is requests.models.Response: + return _requests_response_repr(name, value) + if type(value) is requests.models.PreparedRequest: + return _requests_preparedrequest_repr(name, value) + valueRepr = repr(value) + if '\n' in valueRepr: + return ''.join(['\\\n ', valueRepr.replace('\n', '\n ')]) + return valueRepr + + +@contextlib.contextmanager +def _dump_locals_on_exception(): + try: + yield + except Exception as e: + trace = inspect.trace() + if len(trace) >= 2: + name = _dump_stack_and_locals(trace[1:], exc = e) + logger.fatal(f'Dumped stack and locals to {name}') + raise + + +def _dump_stack_and_locals(trace, exc = None): + with tempfile.NamedTemporaryFile('w', prefix = 'codearchiver_locals_', delete = False) as fp: + if exc is not None: + fp.write('Exception:\n') + fp.write(f' {type(exc).__module__}.{type(exc).__name__}: {exc!s}\n') + fp.write(f' args: {exc.args!r}\n') + fp.write('\n') + + fp.write('Stack:\n') + for frameRecord in trace: + fp.write(f' File "{frameRecord.filename}", line {frameRecord.lineno}, in {frameRecord.function}\n') + for line in frameRecord.code_context: + fp.write(f' {line.strip()}\n') + fp.write('\n') + + for frameRecord in trace: + module = inspect.getmodule(frameRecord[0]) + if not module.__name__.startswith('codearchiver.') and module.__name__ != 'codearchiver': + continue + locals_ = frameRecord[0].f_locals + fp.write(f'Locals from file "{frameRecord.filename}", line {frameRecord.lineno}, in {frameRecord.function}:\n') + for variableName in locals_: + variable = locals_[variableName] + varRepr = _repr(variableName, variable) + fp.write(f' {variableName} {type(variable)} = ') + fp.write(varRepr.replace('\n', '\n ')) + fp.write('\n') + fp.write('\n') + if 'self' in locals_ and hasattr(locals_['self'], '__dict__'): + fp.write(f'Object dict:\n') + fp.write(repr(locals_['self'].__dict__)) + fp.write('\n\n') + name = fp.name + return name + + +def parse_args(): + import codearchiver.core + import codearchiver.modules + import codearchiver.version + + parser = argparse.ArgumentParser(formatter_class = argparse.ArgumentDefaultsHelpFormatter) + parser.add_argument('--version', action = 'version', version = f'codearchiver {codearchiver.version.__version__}') + parser.add_argument('-v', '--verbose', '--verbosity', dest = 'verbosity', action = 'count', default = 0, help = 'Increase output verbosity') + parser.add_argument('--dump-locals', dest = 'dumpLocals', action = 'store_true', default = False, help = 'Dump local variables on serious log messages (warnings or higher)') + parser.add_argument('url', help = 'Target URL') + args = parser.parse_args() + return args + + +def setup_logging(): + logging.setLoggerClass(Logger) + global logger + logger = logging.getLogger(__name__) + + +def configure_logging(verbosity, dumpLocals_): + global dumpLocals + dumpLocals = dumpLocals_ + + rootLogger = logging.getLogger() + + # Set level + if verbosity > 0: + level = logging.INFO if verbosity == 1 else logging.DEBUG + rootLogger.setLevel(level) + for handler in rootLogger.handlers: + handler.setLevel(level) + + # Create formatter + formatter = logging.Formatter('{asctime}.{msecs:03.0f} {levelname} {name} {message}', datefmt = '%Y-%m-%d %H:%M:%S', style = '{') + + # Remove existing handlers + for handler in rootLogger.handlers: + rootLogger.removeHandler(handler) + + # Add stream handler + handler = logging.StreamHandler() + handler.setFormatter(formatter) + rootLogger.addHandler(handler) + + +def main(): + setup_logging() + args = parse_args() + configure_logging(args.verbosity, args.dumpLocals) + + import codearchiver.core + with _dump_locals_on_exception(): + inputUrl = codearchiver.core.InputURL(args.url) + module = codearchiver.core.get_module_instance(inputUrl) + module.process() + +if __name__ == '__main__': + main() diff --git a/codearchiver/core.py b/codearchiver/core.py new file mode 100644 index 0000000..7b8b657 --- /dev/null +++ b/codearchiver/core.py @@ -0,0 +1,169 @@ +import abc +import collections +#import codearchiver.modules # In get_module_class +import codearchiver.version +import logging +import queue +import requests +import time +import typing + + +logger = logging.getLogger(__name__) + + +class InputURL: + def __init__(self, url): + self._url = url + self._response = None + + @property + def url(self): + return self._url + + @property + def content(self): + if self._response is None: + self._response = HttpClient().get(self.url) + return self._response.text + + +class Result(typing.NamedTuple): + '''Container for the result of a module''' + + id: str + '''A unique ID for this result''' + + files: typing.List[str] = [] + '''List of filenames produced by the run''' + + submodules: typing.List['Module'] = [] + '''List of related submodules that need to be run as well''' + + +class HttpError(Exception): + pass + + +class HttpClient: + defaultRetries: int = 3 + defaultUserAgent: str = f'codearchiver/{codearchiver.version.__version__}' + + def __init__(self, retries = None, userAgent = None): + self._session = requests.Session() + self._retries = retries if retries else self.defaultRetries + self._userAgent = userAgent if userAgent else self.defaultUserAgent + + def request(self, method, url, params = None, data = None, headers = None, timeout = 10, responseOkCallback = None): + mergedHeaders = {'User-Agent': self._userAgent} + if headers: + mergedHeaders.update(headers) + headers = mergedHeaders + for attempt in range(self._retries + 1): + # The request is newly prepared on each retry because of potential cookie updates. + req = self._session.prepare_request(requests.Request(method, url, params = params, data = data, headers = headers)) + logger.info(f'Retrieving {req.url}') + logger.debug(f'... with headers: {headers!r}') + if data: + logger.debug(f'... with data: {data!r}') + try: + r = self._session.send(req, timeout = timeout) + except requests.exceptions.RequestException as exc: + if attempt < self._retries: + retrying = ', retrying' + level = logging.WARNING + else: + retrying = '' + level = logging.ERROR + logger.log(level, f'Error retrieving {req.url}: {exc!r}{retrying}') + else: + if responseOkCallback is not None: + success, msg = responseOkCallback(r) + else: + success, msg = (True, None) + msg = f': {msg}' if msg else '' + + if success: + logger.debug(f'{req.url} retrieved successfully{msg}') + return r + else: + if attempt < self._retries: + retrying = ', retrying' + level = logging.WARNING + else: + retrying = '' + level = logging.ERROR + logger.log(level, f'Error retrieving {req.url}{msg}{retrying}') + if attempt < self._retries: + sleepTime = 1.0 * 2**attempt # exponential backoff: sleep 1 second after first attempt, 2 after second, 4 after third, etc. + logger.info(f'Waiting {sleepTime:.0f} seconds') + time.sleep(sleepTime) + else: + msg = f'{self._retries + 1} requests to {req.url} failed, giving up.' + logger.fatal(msg) + raise HttpError(msg) + raise RuntimeError('Reached unreachable code') + + def get(self, *args, **kwargs): + return self.request('GET', *args, **kwargs) + + def post(self, *args, **kwargs): + return self.request('POST', *args, **kwargs) + + +class Module: + '''An abstract base class for a module.''' + + @staticmethod + def matches(inputUrl: InputURL) -> bool: + '''Whether or not this module is for handling `inputUrl`.''' + return False + + def __init__(self, inputUrl): + self._inputUrl = inputUrl + self._httpClient = HttpClient() + + @abc.abstractmethod + def process(self) -> Result: + '''Perform the relevant retrieval(s)''' + + +def get_module_class(inputUrl: InputURL) -> typing.Type['Module']: + '''Get the Module class most suitable for handling `inputUrl`.''' + + # Ensure that modules are imported + # This can't be done at the top because the modules need to refer back to the Module class. + import codearchiver.modules + + # Collect all the Module subclasses and their inheritance level + modules = {} # Module -> level:int + q = queue.Queue() + q.put_nowait((Module, 0)) + while not q.empty(): + class_, level = q.get_nowait() + for c in class_.__subclasses__(): + logger.debug(f'Found module {c.__module__}.{c.__name__} at level {level + 1}') + modules[c] = level + 1 # Implicitly only keeps the highest level, i.e. deepest inheritance + q.put_nowait((c, level + 1)) + + # Restructure into level->[modules] mapping + levels = collections.defaultdict(list) + for class_, level in modules.items(): + levels[level].append(class_) + + # Process in descending level order + for level in reversed(levels): + matches = [class_ for class_ in levels[level] if class_.matches(inputUrl)] + if len(matches) >= 2: + logger.warning('Multiple matching modules for input URL, using the first found') + logger.debug(f'Matching modules at level {level}: {matches!r}') + logger.debug(f'Modules: {levels!r}') + if matches: + logger.info(f'Selecting module {matches[0].__module__}.{matches[0].__name__}') + return matches[0] + + +def get_module_instance(inputUrl: InputURL, **kwargs) -> 'Module': + '''Get an instance of the Module class most suitable for handling `inputUrl`.''' + return get_module_class(inputUrl)(inputUrl, **kwargs) + diff --git a/codearchiver/modules/__init__.py b/codearchiver/modules/__init__.py new file mode 100644 index 0000000..9de989a --- /dev/null +++ b/codearchiver/modules/__init__.py @@ -0,0 +1,15 @@ +import importlib +import os +import codearchiver.core + + +def _import_modules(): + files = os.listdir(__path__[0]) + for fn in files: + if fn.endswith('.py') and fn != '__init__.py': + # Import module if not already imported + moduleName = f'codearchiver.modules.{fn[:-3]}' + module = importlib.import_module(moduleName) + + +_import_modules() diff --git a/codearchiver/modules/git.py b/codearchiver/modules/git.py new file mode 100644 index 0000000..1ea1bec --- /dev/null +++ b/codearchiver/modules/git.py @@ -0,0 +1,53 @@ +import codearchiver.core +import datetime +import logging +import os.path +import shutil +import subprocess + + +logger = logging.getLogger(__name__) + + +class Git(codearchiver.core.Module): + @staticmethod + def matches(inputUrl): + return inputUrl.url.endswith('.git') + + def __init__(self, inputUrl, extraBranches = {}): + self._inputUrl = inputUrl + self._url = inputUrl.url + self._extraBranches = extraBranches + + def process(self): + directory = self._url.rsplit('/', 1)[1] + if os.path.exists(directory): + logger.fatal(f'{directory!r} already exists') + return + startTime = datetime.datetime.utcnow() + bundle = f'{self._url.replace("/", "_")}.{startTime:%Y%m%dT%H%M%SZ}.bundle' + if os.path.exists(bundle): + logger.fatal(f'{bundle!r} already exists') + return + + logger.info(f'Cloning {self._url} into {directory}') + subprocess.run(['git', 'clone', '--verbose', '--mirror', self._url, directory], check = True) + + if self._extraBranches: + for branch, commit in self._extraBranches.items(): + logger.info(f'Fetching commit {commit} as {branch}') + r = subprocess.run(['git', 'fetch', '--verbose', 'origin', commit], cwd = directory) + if r.returncode == 0: + r2 = subprocess.run(['git', 'update-ref', f'refs/codearchiver/{branch}', commit, ''], cwd = directory) + if r2.returncode != 0: + logger.error(f'Failed to update-ref refs/codearchiver/{branch} to {commit}') + else: + logger.error(f'Failed to fetch {commit}') + + logger.info(f'Bundling into {bundle}') + subprocess.run(['git', 'bundle', 'create', f'../{bundle}', '--all'], cwd = directory, check = True) + + logger.info(f'Removing clone') + shutil.rmtree(directory) + + return codearchiver.core.Result(id = f'git-{bundle[:-7]}', files = [bundle]) diff --git a/codearchiver/version.py b/codearchiver/version.py new file mode 100644 index 0000000..7c4396d --- /dev/null +++ b/codearchiver/version.py @@ -0,0 +1,7 @@ +import pkg_resources + + +try: + __version__ = pkg_resources.get_distribution('codearchiver').version +except pkg_resources.DistributionNotFound: + __version__ = None diff --git a/setup.py b/setup.py new file mode 100644 index 0000000..933375f --- /dev/null +++ b/setup.py @@ -0,0 +1,25 @@ +import setuptools + + +setuptools.setup( + name = 'codearchiver', + description = 'A VCS repository archival tool', + author = 'JustAnotherArchivist', + url = 'https://git.kiska.pw/JustAnotherArchivist/codearchiver', + classifiers = [ + 'Development Status :: 3 - Alpha', + 'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)', + 'Programming Language :: Python :: 3.6', + 'Programming Language :: Python :: 3.7', + 'Programming Language :: Python :: 3.8', + ], + packages = ['codearchiver', 'codearchiver.modules'], + setup_requires = ['setuptools_scm'], + use_scm_version = True, + install_requires = ['requests[socks]'], + entry_points = { + 'console_scripts': [ + 'codearchiver = codearchiver.cli:main', + ], + }, +)