mirror of
https://github.com/borgbackup/borg.git
synced 2024-12-25 17:27:31 +00:00
413 lines
11 KiB
Python
413 lines
11 KiB
Python
import argparse
|
|
import binascii
|
|
import grp
|
|
import msgpack
|
|
import os
|
|
import pwd
|
|
import re
|
|
import stat
|
|
import sys
|
|
import time
|
|
from datetime import datetime, timedelta
|
|
from fnmatch import fnmatchcase
|
|
from operator import attrgetter
|
|
|
|
|
|
class Manifest:
|
|
|
|
MANIFEST_ID = b'\0' * 32
|
|
|
|
def __init__(self):
|
|
self.archives = {}
|
|
self.config = {}
|
|
|
|
@classmethod
|
|
def load(cls, repository):
|
|
from .key import key_factory
|
|
manifest = cls()
|
|
manifest.repository = repository
|
|
cdata = repository.get(manifest.MANIFEST_ID)
|
|
manifest.key = key = key_factory(repository, cdata)
|
|
data = key.decrypt(None, cdata)
|
|
manifest.id = key.id_hash(data)
|
|
m = msgpack.unpackb(data)
|
|
if not m.get(b'version') == 1:
|
|
raise ValueError('Invalid manifest version')
|
|
manifest.archives = dict((k.decode('utf-8'), v) for k,v in m[b'archives'].items())
|
|
manifest.timestamp = m.get(b'timestamp')
|
|
if manifest.timestamp:
|
|
manifest.timestamp = manifest.timestamp.decode('ascii')
|
|
manifest.config = m[b'config']
|
|
return manifest, key
|
|
|
|
def write(self):
|
|
self.timestamp = datetime.utcnow().isoformat()
|
|
data = msgpack.packb({
|
|
'version': 1,
|
|
'archives': self.archives,
|
|
'timestamp': self.timestamp,
|
|
'config': self.config,
|
|
})
|
|
self.id = self.key.id_hash(data)
|
|
self.repository.put(self.MANIFEST_ID, self.key.encrypt(data))
|
|
|
|
|
|
def prune_split(archives, pattern, n, skip=[]):
|
|
items = {}
|
|
keep = []
|
|
for a in archives:
|
|
key = to_localtime(a.ts).strftime(pattern)
|
|
items.setdefault(key, [])
|
|
items[key].append(a)
|
|
for key, values in sorted(items.items(), reverse=True):
|
|
if n and values[0] not in skip:
|
|
values.sort(key=attrgetter('ts'), reverse=True)
|
|
keep.append(values[0])
|
|
n -= 1
|
|
return keep
|
|
|
|
|
|
class Statistics:
|
|
|
|
def __init__(self):
|
|
self.osize = self.csize = self.usize = self.nfiles = 0
|
|
|
|
def update(self, size, csize, unique):
|
|
self.osize += size
|
|
self.csize += csize
|
|
if unique:
|
|
self.usize += csize
|
|
|
|
def print_(self):
|
|
print('Number of files: %d' % self.nfiles)
|
|
print('Original size: %d (%s)' % (self.osize, format_file_size(self.osize)))
|
|
print('Compressed size: %s (%s)' % (self.csize, format_file_size(self.csize)))
|
|
print('Unique data: %d (%s)' % (self.usize, format_file_size(self.usize)))
|
|
|
|
|
|
def get_keys_dir():
|
|
"""Determine where to repository keys and cache"""
|
|
return os.environ.get('ATTIC_KEYS_DIR',
|
|
os.path.join(os.path.expanduser('~'), '.attic', 'keys'))
|
|
|
|
|
|
def get_cache_dir():
|
|
"""Determine where to repository keys and cache"""
|
|
return os.environ.get('ATTIC_CACHE_DIR',
|
|
os.path.join(os.path.expanduser('~'), '.cache', 'attic'))
|
|
|
|
|
|
def to_localtime(ts):
|
|
"""Convert datetime object from UTC to local time zone"""
|
|
return ts - timedelta(seconds=time.altzone)
|
|
|
|
|
|
def adjust_patterns(paths, excludes):
|
|
if paths:
|
|
return (excludes or []) + [IncludePattern(path) for path in paths] + [ExcludePattern('*')]
|
|
else:
|
|
return excludes
|
|
|
|
|
|
def exclude_path(path, patterns):
|
|
"""Used by create and extract sub-commands to determine
|
|
if an item should be processed or not
|
|
"""
|
|
for pattern in (patterns or []):
|
|
if pattern.match(path):
|
|
return isinstance(pattern, ExcludePattern)
|
|
return False
|
|
|
|
|
|
class IncludePattern:
|
|
"""--include PATTERN
|
|
"""
|
|
def __init__(self, pattern):
|
|
self.pattern = pattern
|
|
|
|
def match(self, path):
|
|
dir, name = os.path.split(path)
|
|
return (path == self.pattern
|
|
or (dir + os.path.sep).startswith(self.pattern))
|
|
|
|
def __repr__(self):
|
|
return '%s(%s)' % (type(self), self.pattern)
|
|
|
|
|
|
class ExcludePattern(IncludePattern):
|
|
"""
|
|
"""
|
|
def __init__(self, pattern):
|
|
self.pattern = self.dirpattern = pattern
|
|
if not pattern.endswith(os.path.sep):
|
|
self.dirpattern += os.path.sep
|
|
|
|
def match(self, path):
|
|
dir, name = os.path.split(path)
|
|
return (path == self.pattern
|
|
or (dir + os.path.sep).startswith(self.dirpattern)
|
|
or fnmatchcase(name, self.pattern))
|
|
|
|
def __repr__(self):
|
|
return '%s(%s)' % (type(self), self.pattern)
|
|
|
|
|
|
def walk_path(path, skip_inodes=None):
|
|
st = os.lstat(path)
|
|
if skip_inodes and (st.st_ino, st.st_dev) in skip_inodes:
|
|
return
|
|
yield path, st
|
|
if stat.S_ISDIR(st.st_mode):
|
|
for f in os.listdir(path):
|
|
for x in walk_path(os.path.join(path, f), skip_inodes):
|
|
yield x
|
|
|
|
|
|
def format_time(t):
|
|
"""Format datetime suitable for fixed length list output
|
|
"""
|
|
if (datetime.now() - t).days < 365:
|
|
return t.strftime('%b %d %H:%M')
|
|
else:
|
|
return t.strftime('%b %d %Y')
|
|
|
|
|
|
def format_timedelta(td):
|
|
"""Format timedelta in a human friendly format
|
|
"""
|
|
# Since td.total_seconds() requires python 2.7
|
|
ts = (td.microseconds + (td.seconds + td.days * 24 * 3600) * 10 ** 6) / float(10 ** 6)
|
|
s = ts % 60
|
|
m = int(ts / 60) % 60
|
|
h = int(ts / 3600) % 24
|
|
txt = '%.2f seconds' % s
|
|
if m:
|
|
txt = '%d minutes %s' % (m, txt)
|
|
if h:
|
|
txt = '%d hours %s' % (h, txt)
|
|
if td.days:
|
|
txt = '%d days %s' % (td.days, txt)
|
|
return txt
|
|
|
|
|
|
def format_file_mode(mod):
|
|
"""Format file mode bits for list output
|
|
"""
|
|
def x(v):
|
|
return ''.join(v & m and s or '-'
|
|
for m, s in ((4, 'r'), (2, 'w'), (1, 'x')))
|
|
return '%s%s%s' % (x(mod // 64), x(mod // 8), x(mod))
|
|
|
|
|
|
def format_file_size(v):
|
|
"""Format file size into a human friendly format
|
|
"""
|
|
if v > 1024 * 1024 * 1024:
|
|
return '%.2f GB' % (v / 1024. / 1024. / 1024.)
|
|
elif v > 1024 * 1024:
|
|
return '%.2f MB' % (v / 1024. / 1024.)
|
|
elif v > 1024:
|
|
return '%.2f kB' % (v / 1024.)
|
|
else:
|
|
return '%d B' % v
|
|
|
|
|
|
class IntegrityError(Exception):
|
|
"""
|
|
"""
|
|
|
|
|
|
def memoize(function):
|
|
cache = {}
|
|
|
|
def decorated_function(*args):
|
|
try:
|
|
return cache[args]
|
|
except KeyError:
|
|
val = function(*args)
|
|
cache[args] = val
|
|
return val
|
|
return decorated_function
|
|
|
|
|
|
@memoize
|
|
def uid2user(uid):
|
|
try:
|
|
return pwd.getpwuid(uid).pw_name
|
|
except KeyError:
|
|
return None
|
|
|
|
|
|
@memoize
|
|
def user2uid(user):
|
|
try:
|
|
return user and pwd.getpwnam(user).pw_uid
|
|
except KeyError:
|
|
return None
|
|
|
|
|
|
@memoize
|
|
def gid2group(gid):
|
|
try:
|
|
return grp.getgrgid(gid).gr_name
|
|
except KeyError:
|
|
return None
|
|
|
|
|
|
@memoize
|
|
def group2gid(group):
|
|
try:
|
|
return group and grp.getgrnam(group).gr_gid
|
|
except KeyError:
|
|
return None
|
|
|
|
|
|
class Location:
|
|
"""Object representing a repository / archive location
|
|
"""
|
|
proto = user = host = port = path = archive = None
|
|
ssh_re = re.compile(r'(?P<proto>ssh)://(?:(?P<user>[^@]+)@)?'
|
|
r'(?P<host>[^:/#]+)(?::(?P<port>\d+))?'
|
|
r'(?P<path>[^:]+)(?:::(?P<archive>.+))?')
|
|
file_re = re.compile(r'(?P<proto>file)://'
|
|
r'(?P<path>[^:]+)(?:::(?P<archive>.+))?')
|
|
scp_re = re.compile(r'((?:(?P<user>[^@]+)@)?(?P<host>[^:/]+):)?'
|
|
r'(?P<path>[^:]+)(?:::(?P<archive>.+))?')
|
|
|
|
def __init__(self, text):
|
|
self.orig = text
|
|
if not self.parse(text):
|
|
raise ValueError
|
|
|
|
def parse(self, text):
|
|
m = self.ssh_re.match(text)
|
|
if m:
|
|
self.proto = m.group('proto')
|
|
self.user = m.group('user')
|
|
self.host = m.group('host')
|
|
self.port = m.group('port') and int(m.group('port')) or 22
|
|
self.path = m.group('path')
|
|
self.archive = m.group('archive')
|
|
return True
|
|
m = self.file_re.match(text)
|
|
if m:
|
|
self.proto = m.group('proto')
|
|
self.path = m.group('path')
|
|
self.archive = m.group('archive')
|
|
return True
|
|
m = self.scp_re.match(text)
|
|
if m:
|
|
self.user = m.group('user')
|
|
self.host = m.group('host')
|
|
self.path = m.group('path')
|
|
self.archive = m.group('archive')
|
|
self.proto = self.host and 'ssh' or 'file'
|
|
if self.proto == 'ssh':
|
|
self.port = 22
|
|
return True
|
|
return False
|
|
|
|
def __str__(self):
|
|
items = []
|
|
items.append('proto=%r' % self.proto)
|
|
items.append('user=%r' % self.user)
|
|
items.append('host=%r' % self.host)
|
|
items.append('port=%r' % self.port)
|
|
items.append('path=%r' % self.path)
|
|
items.append('archive=%r' % self.archive)
|
|
return ', '.join(items)
|
|
|
|
def to_key_filename(self):
|
|
name = re.sub('[^\w]', '_', self.path).strip('_')
|
|
if self.proto != 'file':
|
|
name = self.host + '__' + name
|
|
return os.path.join(get_keys_dir(), name)
|
|
|
|
def __repr__(self):
|
|
return "Location(%s)" % self
|
|
|
|
|
|
def location_validator(archive=None):
|
|
def validator(text):
|
|
try:
|
|
loc = Location(text)
|
|
except ValueError:
|
|
raise argparse.ArgumentTypeError('Invalid location format: "%s"' % text)
|
|
if archive is True and not loc.archive:
|
|
raise argparse.ArgumentTypeError('"%s": No archive specified' % text)
|
|
elif archive is False and loc.archive:
|
|
raise argparse.ArgumentTypeError('"%s" No archive can be specified' % text)
|
|
return loc
|
|
return validator
|
|
|
|
|
|
def read_msgpack(filename):
|
|
with open(filename, 'rb') as fd:
|
|
return msgpack.unpack(fd)
|
|
|
|
|
|
def write_msgpack(filename, d):
|
|
with open(filename + '.tmp', 'wb') as fd:
|
|
msgpack.pack(d, fd)
|
|
fd.flush()
|
|
os.fsync(fd)
|
|
os.rename(filename + '.tmp', filename)
|
|
|
|
|
|
def decode_dict(d, keys, encoding='utf-8', errors='surrogateescape'):
|
|
for key in keys:
|
|
if isinstance(d.get(key), bytes):
|
|
d[key] = d[key].decode(encoding, errors)
|
|
return d
|
|
|
|
|
|
def remove_surrogates(s, errors='replace'):
|
|
"""Replace surrogates generated by fsdecode with '?'
|
|
"""
|
|
return s.encode('utf-8', errors).decode('utf-8')
|
|
|
|
|
|
_safe_re = re.compile('^((..)?/+)+')
|
|
|
|
|
|
def make_path_safe(path):
|
|
"""Make path safe by making it relative and local
|
|
"""
|
|
return _safe_re.sub('', path) or '.'
|
|
|
|
|
|
def daemonize():
|
|
"""Detach process from controlling terminal and run in background
|
|
"""
|
|
pid = os.fork()
|
|
if pid:
|
|
os._exit(0)
|
|
os.setsid()
|
|
pid = os.fork()
|
|
if pid:
|
|
os._exit(0)
|
|
os.chdir('/')
|
|
os.close(0)
|
|
os.close(1)
|
|
os.close(2)
|
|
fd = os.open('/dev/null', os.O_RDWR)
|
|
os.dup2(fd, 0)
|
|
os.dup2(fd, 1)
|
|
os.dup2(fd, 2)
|
|
|
|
|
|
if sys.version < '3.3':
|
|
# st_mtime_ns attribute only available in 3.3+
|
|
def st_mtime_ns(st):
|
|
return int(st.st_mtime * 1e9)
|
|
|
|
# unhexlify in < 3.3 incorrectly only accepts bytes input
|
|
def unhexlify(data):
|
|
if isinstance(data, str):
|
|
data = data.encode('ascii')
|
|
return binascii.unhexlify(data)
|
|
else:
|
|
def st_mtime_ns(st):
|
|
return st.st_mtime_ns
|
|
|
|
unhexlify = binascii.unhexlify
|