PKN safefs.py"""A thread-safe file operation package for python""" __version__ = '0.0.7' import os import shutil import tempfile from hashlib import md5 from filelock import FileLock TMPDIR = os.path.join(tempfile.gettempdir(), 'safefs.locks') STACK_LOCK_NAME = 'SAFEFS_STACK_LOCK' if not os.path.exists(TMPDIR): os.makedirs(TMPDIR) def _get_lock_file(path): basename = md5(str(path).encode('utf-8')).hexdigest() return os.path.join(TMPDIR, basename + '.lock') class SafeFsContext(object): def __init__(self, func, fs2lock, args, kwargs): self.func = func self.args = args self.kwargs = kwargs self.fs2lock = dict(zip(fs2lock, [None] * len(fs2lock))) self.stacklock = FileLock(_get_lock_file( '%s.%s' % (STACK_LOCK_NAME, id(self)) )) def __enter__(self): with self.stacklock: for lfile, lock in self.fs2lock.items(): lock = lock or FileLock(_get_lock_file(lfile)) self.fs2lock[lfile] = lock lock.acquire() try: return self.func(*self.args, **self.kwargs) except Exception: from sys import exc_info self.__exit__(*exc_info()) raise def __exit__(self, type, value, traceback): with self.stacklock: for lock in self.fs2lock.values(): if lock and lock.is_locked: lock.release() class SafeFsProxy(object): def __init__(self, func, argkeys, kwkeys, context): self.func = func self.argkeys = argkeys self.kwkeys = kwkeys self.context = context def __call__(self, *args, **kwargs): if kwargs.pop('_context', self.context): exfiles = kwargs.pop('_extra', []) if not isinstance(exfiles, (tuple, list)): exfiles = [exfiles] fs2lock = set(arg for i, arg in enumerate(args) if i in self.argkeys) fs2lock |= set(kw for key, kw in kwargs.items() if kw in self.kwkeys) fs2lock |= set(exfiles) return SafeFsContext(self.func, fs2lock, args, kwargs) else: return self.func(*args, **kwargs) def safefs(*args, **kwargs): def real_decorator(func): argkeys = [] kwkeys = [] for arg in args: if isinstance(arg, int): argkeys.append(arg) else: kwkeys.append(arg) context = kwargs.pop('_context', False) if not argkeys and not kwkeys: argkeys = [0] return SafeFsProxy(func, argkeys, kwkeys, context) return real_decorator def register(*args, **kwargs): func = args[0] if not callable(func): raise TypeError('Expect a callable to be registered.') return safefs(*args[1:], **kwargs)(func) exists = register(os.path.exists, 0, 'path') isfile = register(os.path.isfile, 0, 'path') isdir = register(os.path.isdir, 0, 'path') islink = register(os.path.islink, 0, 'path') @safefs(0, 'path') def remove(path): if os.path.islink(path): os.remove(path) elif os.path.isdir(path): return shutil.rmtree(path) elif os.path.isfile(path): return os.remove(path) return True @safefs(0, 1, 'src', 'dst') def move(src, dst, overwrite = True): if overwrite: remove(dst) return shutil.move(src, dst) @safefs(0, 1, 'src', 'dst') def copy(src, dst, overwrite = True): if overwrite: remove(dst) if os.path.isdir(src): return shutil.copytree(src, dst) return shutil.copyfile(src, dst) @safefs(0, 1, 'src', 'dst') def link(src, dst, overwrite = True): if overwrite: remove(dst) return os.symlink(src, dst) @safefs(0, 1, 'path1', 'path2') def samefile(path1, path2): exist1 = os.path.exists(path1) exist2 = os.path.exists(path2) if not exist1 and not exist2: return path1 == path2 if not exist1 or not exist2: return False return os.path.samefile(path1, path2) @safefs(0, 1, 'src', 'dst') def gzip(src, dst, overwrite = True): import gzip if overwrite: remove(dst) if os.path.isdir(src): # tar.gz import tarfile from glob import glob cwd = os.getcwd() try: os.chdir(src) with tarfile.open(dst, 'w:gz') as tar: for name in glob('./*'): tar.add(name) os.chdir(cwd) return True except Exception: return False else: import gzip with open(src, 'rb') as sf, gzip.open(dst, 'wb') as df: return shutil.copyfileobj(sf, df) @safefs(0, 'path') def makedirs(path, overwrite = True): if overwrite: remove(path) return os.makedirs(path) @safefs(0, 1, 'src', 'dst') def gunzip(src, dst, overwrite = True): if overwrite: remove(dst) if src.endswith('.tgz') or src.endswith('.tar.gz'): import tarfile makedirs(dst) with tarfile.open(src, 'r:gz') as tar: return tar.extractall(dst) else: import gzip with open(src, 'rb') as sf, gzip.open(dst, 'wb') as df: return shutil.copyfileobj(sf, df) @safefs(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, _context = True) def lock(*files, **kwargs): return PKY|N3o11safefs-0.0.7.dist-info/LICENSEThe MIT License (MIT) Copyright (c) 2019 pwwang Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. PK!HMuSasafefs-0.0.7.dist-info/WHEEL HM K-*ϳR03rOK-J,/RH,szd&Y)r$[)T&UD"PK!HZ safefs-0.0.7.dist-info/METADATA=0}}~bғċFWXҦ-ffIa'+TaX8XaX1Hf␀k aԢ#P :򃍷=V$ڛZQT2}7QRo=ȮYX2aVDmq9s;uh 8@Q_f^[~PK!H[csafefs-0.0.7.dist-info/RECORDurC@{e)9vUdI. %~}g:}뒜  Fuƒ:+5Q4&nN%~ԹڀW )"2+^*yv ^(=km#.HИqSvsaO5Ab,7hy Hw .B>_ԣ lDfhM{X'o#ОZh_[ג[ >Oz/@]_j)|XPKN safefs.pyPKY|N3o11,safefs-0.0.7.dist-info/LICENSEPK!HMuSasafefs-0.0.7.dist-info/WHEELPK!HZ &safefs-0.0.7.dist-info/METADATAPK!H[csafefs-0.0.7.dist-info/RECORDPKeL