borg/src/borg/helpers/parseformat.py

1291 lines
47 KiB
Python

import abc
import argparse
import base64
import binascii
import hashlib
import json
import os
import os.path
import re
import shlex
import stat
import uuid
from typing import Dict, Set, Tuple, ClassVar, Any, TYPE_CHECKING, Literal
from collections import Counter, OrderedDict
from datetime import datetime, timezone
from functools import partial
from string import Formatter
from ..logger import create_logger
logger = create_logger()
from .errors import Error
from .fs import get_keys_dir, make_path_safe
from .msgpack import Timestamp
from .time import OutputTimestamp, format_time, safe_timestamp
from .. import __version__ as borg_version
from .. import __version_tuple__ as borg_version_tuple
from ..constants import * # NOQA
if TYPE_CHECKING:
from ..item import ItemDiff
def bin_to_hex(binary):
return binascii.hexlify(binary).decode("ascii")
def hex_to_bin(hex, length=None):
try:
binary = binascii.unhexlify(hex)
binary_len = len(binary)
if length is not None and binary_len != length:
raise ValueError(f"Expected {length} bytes ({2 * length} hex digits), got {binary_len} bytes.")
except binascii.Error as e:
raise ValueError(str(e)) from None
return binary
def safe_decode(s, coding="utf-8", errors="surrogateescape"):
"""decode bytes to str, with round-tripping "invalid" bytes"""
if s is None:
return None
return s.decode(coding, errors)
def safe_encode(s, coding="utf-8", errors="surrogateescape"):
"""encode str to bytes, with round-tripping "invalid" bytes"""
if s is None:
return None
return s.encode(coding, errors)
def remove_surrogates(s, errors="replace"):
"""Replace surrogates generated by fsdecode with '?'"""
return s.encode("utf-8", errors).decode("utf-8")
def binary_to_json(key, value):
assert isinstance(key, str)
assert isinstance(value, bytes)
return {key + "_b64": base64.b64encode(value).decode("ascii")}
def text_to_json(key, value):
"""
Return a dict made from key/value that can be fed safely into a JSON encoder.
JSON can only contain pure, valid unicode (but not: unicode with surrogate escapes).
But sometimes we have to deal with such values and we do it like this:
- <key>: value as pure unicode text (surrogate escapes, if any, replaced by ?)
- <key>_b64: value as base64 encoded binary representation (only set if value has surrogate-escapes)
"""
coding = "utf-8"
assert isinstance(key, str)
assert isinstance(value, str) # str might contain surrogate escapes
data = {}
try:
value.encode(coding, errors="strict") # check if pure unicode
except UnicodeEncodeError:
# value has surrogate escape sequences
data[key] = remove_surrogates(value)
value_bytes = value.encode(coding, errors="surrogateescape")
data.update(binary_to_json(key, value_bytes))
else:
# value is pure unicode
data[key] = value
# we do not give the b64 representation, not needed
return data
def join_cmd(argv, rs=False):
cmd = shlex.join(argv)
return remove_surrogates(cmd) if rs else cmd
def eval_escapes(s):
"""Evaluate literal escape sequences in a string (eg `\\n` -> `\n`)."""
return s.encode("ascii", "backslashreplace").decode("unicode-escape")
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 positive_int_validator(value):
"""argparse type for positive integers"""
int_value = int(value)
if int_value <= 0:
raise argparse.ArgumentTypeError("A positive integer is required: %s" % value)
return int_value
def interval(s):
"""Convert a string representing a valid interval to a number of hours."""
multiplier = {"H": 1, "d": 24, "w": 24 * 7, "m": 24 * 31, "y": 24 * 365}
if s.endswith(tuple(multiplier.keys())):
number = s[:-1]
suffix = s[-1]
else:
# range suffixes in ascending multiplier order
ranges = [k for k, v in sorted(multiplier.items(), key=lambda t: t[1])]
raise argparse.ArgumentTypeError(f'Unexpected interval time unit "{s[-1]}": expected one of {ranges!r}')
try:
hours = int(number) * multiplier[suffix]
except ValueError:
hours = -1
if hours <= 0:
raise argparse.ArgumentTypeError('Unexpected interval number "%s": expected an integer greater than 0' % number)
return hours
def ChunkerParams(s):
params = s.strip().split(",")
count = len(params)
if count == 0:
raise argparse.ArgumentTypeError("no chunker params given")
algo = params[0].lower()
if algo == CH_FAIL and count == 3:
block_size = int(params[1])
fail_map = str(params[2])
return algo, block_size, fail_map
if algo == CH_FIXED and 2 <= count <= 3: # fixed, block_size[, header_size]
block_size = int(params[1])
header_size = int(params[2]) if count == 3 else 0
if block_size < 64:
# we are only disallowing the most extreme cases of abuse here - this does NOT imply
# that cutting chunks of the minimum allowed size is efficient concerning storage
# or in-memory chunk management.
# choose the block (chunk) size wisely: if you have a lot of data and you cut
# it into very small chunks, you are asking for trouble!
raise argparse.ArgumentTypeError("block_size must not be less than 64 Bytes")
if block_size > MAX_DATA_SIZE or header_size > MAX_DATA_SIZE:
raise argparse.ArgumentTypeError(
"block_size and header_size must not exceed MAX_DATA_SIZE [%d]" % MAX_DATA_SIZE
)
return algo, block_size, header_size
if algo == "default" and count == 1: # default
return CHUNKER_PARAMS
# this must stay last as it deals with old-style compat mode (no algorithm, 4 params, buzhash):
if algo == CH_BUZHASH and count == 5 or count == 4: # [buzhash, ]chunk_min, chunk_max, chunk_mask, window_size
chunk_min, chunk_max, chunk_mask, window_size = (int(p) for p in params[count - 4 :])
if not (chunk_min <= chunk_mask <= chunk_max):
raise argparse.ArgumentTypeError("required: chunk_min <= chunk_mask <= chunk_max")
if chunk_min < 6:
# see comment in 'fixed' algo check
raise argparse.ArgumentTypeError(
"min. chunk size exponent must not be less than 6 (2^6 = 64B min. chunk size)"
)
if chunk_max > 23:
raise argparse.ArgumentTypeError(
"max. chunk size exponent must not be more than 23 (2^23 = 8MiB max. chunk size)"
)
return CH_BUZHASH, chunk_min, chunk_max, chunk_mask, window_size
raise argparse.ArgumentTypeError("invalid chunker params")
def FilesCacheMode(s):
ENTRIES_MAP = dict(ctime="c", mtime="m", size="s", inode="i", rechunk="r", disabled="d")
VALID_MODES = ("cis", "ims", "cs", "ms", "cr", "mr", "d", "s") # letters in alpha order
entries = set(s.strip().split(","))
if not entries <= set(ENTRIES_MAP):
raise argparse.ArgumentTypeError(
"cache mode must be a comma-separated list of: %s" % ",".join(sorted(ENTRIES_MAP))
)
short_entries = {ENTRIES_MAP[entry] for entry in entries}
mode = "".join(sorted(short_entries))
if mode not in VALID_MODES:
raise argparse.ArgumentTypeError("cache mode short must be one of: %s" % ",".join(VALID_MODES))
return mode
def partial_format(format, mapping):
"""
Apply format.format_map(mapping) while preserving unknown keys
Does not support attribute access, indexing and ![rsa] conversions
"""
for key, value in mapping.items():
key = re.escape(key)
format = re.sub(
rf"(?<!\{{)((\{{{key}\}})|(\{{{key}:[^\}}]*\}}))", lambda match: match.group(1).format_map(mapping), format
)
return format
class DatetimeWrapper:
def __init__(self, dt):
self.dt = dt
def __format__(self, format_spec):
if format_spec == "":
format_spec = ISO_FORMAT_NO_USECS
return self.dt.__format__(format_spec)
class PlaceholderError(Error):
"""Formatting Error: "{}".format({}): {}({})"""
exit_mcode = 5
class InvalidPlaceholder(PlaceholderError):
"""Invalid placeholder "{}" in string: {}"""
exit_mcode = 6
def format_line(format, data):
for _, key, _, conversion in Formatter().parse(format):
if not key:
continue
if conversion or key not in data:
raise InvalidPlaceholder(key, format)
try:
return format.format_map(data)
except Exception as e:
raise PlaceholderError(format, data, e.__class__.__name__, str(e))
def _replace_placeholders(text, overrides={}):
"""Replace placeholders in text with their values."""
from ..platform import fqdn, hostname, getosusername
current_time = datetime.now(timezone.utc)
data = {
"pid": os.getpid(),
"fqdn": fqdn,
"reverse-fqdn": ".".join(reversed(fqdn.split("."))),
"hostname": hostname,
"now": DatetimeWrapper(current_time.astimezone()),
"utcnow": DatetimeWrapper(current_time),
"user": getosusername(),
"uuid4": str(uuid.uuid4()),
"borgversion": borg_version,
"borgmajor": "%d" % borg_version_tuple[:1],
"borgminor": "%d.%d" % borg_version_tuple[:2],
"borgpatch": "%d.%d.%d" % borg_version_tuple[:3],
**overrides,
}
return format_line(text, data)
class PlaceholderReplacer:
def __init__(self):
self.reset()
def override(self, key, value):
self.overrides[key] = value
def reset(self):
self.overrides = {}
def __call__(self, text, overrides=None):
ovr = {}
ovr.update(self.overrides)
ovr.update(overrides or {})
return _replace_placeholders(text, overrides=ovr)
replace_placeholders = PlaceholderReplacer()
def PathSpec(text):
if not text:
raise argparse.ArgumentTypeError("Empty strings are not accepted as paths.")
return text
def SortBySpec(text):
from ..manifest import AI_HUMAN_SORT_KEYS
for token in text.split(","):
if token not in AI_HUMAN_SORT_KEYS:
raise argparse.ArgumentTypeError("Invalid sort key: %s" % token)
return text.replace("timestamp", "ts").replace("archive", "name")
def format_file_size(v, precision=2, sign=False, iec=False):
"""Format file size into a human friendly format"""
fn = sizeof_fmt_iec if iec else sizeof_fmt_decimal
return fn(v, suffix="B", sep=" ", precision=precision, sign=sign)
class FileSize(int):
def __new__(cls, value, iec=False):
obj = int.__new__(cls, value)
obj.iec = iec
return obj
def __format__(self, format_spec):
return format_file_size(int(self), iec=self.iec).__format__(format_spec)
def parse_file_size(s):
"""Return int from file size (1234, 55G, 1.7T)."""
if not s:
return int(s) # will raise
suffix = s[-1]
power = 1000
try:
factor = {"K": power, "M": power**2, "G": power**3, "T": power**4, "P": power**5}[suffix]
s = s[:-1]
except KeyError:
factor = 1
return int(float(s) * factor)
def parse_storage_quota(storage_quota):
parsed = parse_file_size(storage_quota)
if parsed < parse_file_size("10M"):
raise argparse.ArgumentTypeError("quota is too small (%s). At least 10M are required." % storage_quota)
return parsed
def sizeof_fmt(num, suffix="B", units=None, power=None, sep="", precision=2, sign=False):
sign = "+" if sign and num > 0 else ""
fmt = "{0:{1}.{2}f}{3}{4}{5}"
prec = 0
for unit in units[:-1]:
if abs(round(num, precision)) < power:
break
num /= float(power)
prec = precision
else:
unit = units[-1]
return fmt.format(num, sign, prec, sep, unit, suffix)
def sizeof_fmt_iec(num, suffix="B", sep="", precision=2, sign=False):
return sizeof_fmt(
num,
suffix=suffix,
sep=sep,
precision=precision,
sign=sign,
units=["", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi"],
power=1024,
)
def sizeof_fmt_decimal(num, suffix="B", sep="", precision=2, sign=False):
return sizeof_fmt(
num,
suffix=suffix,
sep=sep,
precision=precision,
sign=sign,
units=["", "k", "M", "G", "T", "P", "E", "Z", "Y"],
power=1000,
)
def format_archive(archive):
return "%-36s %s [%s]" % (archive.name, format_time(archive.ts), bin_to_hex(archive.id))
def parse_stringified_list(s):
items = re.split(" *, *", s)
return [item for item in items if item != ""]
class Location:
"""Object representing a repository location"""
# user must not contain "@", ":" or "/".
# Quoting adduser error message:
# "To avoid problems, the username should consist only of letters, digits,
# underscores, periods, at signs and dashes, and not start with a dash
# (as defined by IEEE Std 1003.1-2001)."
# We use "@" as separator between username and hostname, so we must
# disallow it within the pure username part.
optional_user_re = r"""
(?:(?P<user>[^@:/]+)@)?
"""
# path must not contain :: (it ends at :: or string end), but may contain single colons.
# to avoid ambiguities with other regexes, it must also not start with ":" nor with "//" nor with "ssh://".
local_path_re = r"""
(?!(:|//|ssh://|socket://)) # not starting with ":" or // or ssh:// or socket://
(?P<path>([^:]|(:(?!:)))+) # any chars, but no "::"
"""
# file_path must not contain :: (it ends at :: or string end), but may contain single colons.
# it must start with a / and that slash is part of the path.
file_path_re = r"""
(?P<path>(([^/]*)/([^:]|(:(?!:)))+)) # start opt. servername, then /, then any chars, but no "::"
"""
# abs_path must not contain :: (it ends at :: or string end), but may contain single colons.
# it must start with a / and that slash is part of the path.
abs_path_re = r"""
(?P<path>(/([^:]|(:(?!:)))+)) # start with /, then any chars, but no "::"
"""
# host NAME, or host IP ADDRESS (v4 or v6, v6 must be in square brackets)
host_re = r"""
(?P<host>(
(?!\[)[^:/]+(?<!\]) # hostname or v4 addr, not containing : or / (does not match v6 addr: no brackets!)
|
\[[0-9a-fA-F:.]+\]) # ipv6 address in brackets
)
"""
# regexes for misc. kinds of supported location specifiers:
ssh_re = re.compile(
r"""
(?P<proto>ssh):// # ssh://
"""
+ optional_user_re
+ host_re
+ r""" # user@ (optional), host name or address
(?::(?P<port>\d+))? # :port (optional)
"""
+ abs_path_re,
re.VERBOSE,
) # path
socket_re = re.compile(
r"""
(?P<proto>socket):// # socket://
"""
+ abs_path_re,
re.VERBOSE,
) # path
file_re = re.compile(
r"""
(?P<proto>file):// # file://
"""
+ file_path_re,
re.VERBOSE,
) # servername/path or path
local_re = re.compile(local_path_re, re.VERBOSE) # local path
win_file_re = re.compile(
r"""
(?:file://)? # optional file protocol
(?P<path>
(?:[a-zA-Z]:)? # Drive letter followed by a colon (optional)
(?:[^:]+) # Anything which does not contain a :, at least one char
)
""",
re.VERBOSE,
)
def __init__(self, text="", overrides={}, other=False):
self.repo_env_var = "BORG_OTHER_REPO" if other else "BORG_REPO"
self.valid = False
self.proto = None
self.user = None
self._host = None
self.port = None
self.path = None
self.raw = None
self.processed = None
self.parse(text, overrides)
def parse(self, text, overrides={}):
if not text:
# we did not get a text to parse, so we try to fetch from the environment
text = os.environ.get(self.repo_env_var)
if text is None:
return
self.raw = text # as given by user, might contain placeholders
self.processed = replace_placeholders(self.raw, overrides) # after placeholder replacement
valid = self._parse(self.processed)
if valid:
self.valid = True
else:
raise ValueError('Invalid location format: "%s"' % self.processed)
def _parse(self, text):
def normpath_special(p):
# avoid that normpath strips away our relative path hack and even makes p absolute
relative = p.startswith("/./")
p = os.path.normpath(p)
return ("/." + p) if relative else p
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 None
self.path = normpath_special(m.group("path"))
return True
m = self.file_re.match(text)
if m:
self.proto = m.group("proto")
self.path = normpath_special(m.group("path"))
return True
m = self.socket_re.match(text)
if m:
self.proto = m.group("proto")
self.path = normpath_special(m.group("path"))
return True
m = self.local_re.match(text)
if m:
self.proto = "file"
self.path = normpath_special(m.group("path"))
return True
return False
def __str__(self):
items = [
"proto=%r" % self.proto,
"user=%r" % self.user,
"host=%r" % self.host,
"port=%r" % self.port,
"path=%r" % self.path,
]
return ", ".join(items)
def to_key_filename(self):
name = re.sub(r"[^\w]", "_", self.path).strip("_")
if self.proto not in ("file", "socket"):
name = re.sub(r"[^\w]", "_", self.host) + "__" + name
if len(name) > 100:
# Limit file names to some reasonable length. Most file systems
# limit them to 255 [unit of choice]; due to variations in unicode
# handling we truncate to 100 *characters*.
name = name[:100]
return os.path.join(get_keys_dir(), name)
def __repr__(self):
return "Location(%s)" % self
@property
def host(self):
# strip square brackets used for IPv6 addrs
if self._host is not None:
return self._host.lstrip("[").rstrip("]")
def canonical_path(self):
if self.proto in ("file", "socket"):
return self.path
else:
if self.path and self.path.startswith("~"):
path = "/" + self.path # /~/x = path x relative to home dir
elif self.path and not self.path.startswith("/"):
path = "/./" + self.path # /./x = path x relative to cwd
else:
path = self.path
return "ssh://{}{}{}{}".format(
f"{self.user}@" if self.user else "",
self._host, # needed for ipv6 addrs
f":{self.port}" if self.port else "",
path,
)
def with_timestamp(self, timestamp):
# note: this only affects the repository URL/path, not the archive name!
return Location(
self.raw,
overrides={
"now": DatetimeWrapper(timestamp),
"utcnow": DatetimeWrapper(timestamp.astimezone(timezone.utc)),
},
)
def location_validator(proto=None, other=False):
def validator(text):
try:
loc = Location(text, other=other)
except ValueError as err:
raise argparse.ArgumentTypeError(str(err)) from None
if proto is not None and loc.proto != proto:
if proto == "file":
raise argparse.ArgumentTypeError('"%s": Repository must be local' % text)
else:
raise argparse.ArgumentTypeError('"%s": Repository must be remote' % text)
return loc
return validator
def relative_time_marker_validator(text: str):
time_marker_regex = r"^\d+[md]$"
match = re.compile(time_marker_regex).search(text)
if not match:
raise argparse.ArgumentTypeError(f"Invalid relative time marker used: {text}")
else:
return text
def text_validator(*, name, max_length, min_length=0, invalid_ctrl_chars="\0", invalid_chars="", no_blanks=False):
def validator(text):
assert isinstance(text, str)
if len(text) < min_length:
raise argparse.ArgumentTypeError(f'Invalid {name}: "{text}" [length < {min_length}]')
if len(text) > max_length:
raise argparse.ArgumentTypeError(f'Invalid {name}: "{text}" [length > {max_length}]')
if invalid_ctrl_chars and re.search(f"[{re.escape(invalid_ctrl_chars)}]", text):
raise argparse.ArgumentTypeError(f'Invalid {name}: "{text}" [invalid control chars detected]')
if invalid_chars and re.search(f"[{re.escape(invalid_chars)}]", text):
raise argparse.ArgumentTypeError(
f'Invalid {name}: "{text}" [invalid chars detected matching "{invalid_chars}"]'
)
if no_blanks and (text.startswith(" ") or text.endswith(" ")):
raise argparse.ArgumentTypeError(f'Invalid {name}: "{text}" [leading or trailing blanks detected]')
try:
text.encode("utf-8", errors="strict")
except UnicodeEncodeError:
# looks like text contains surrogate-escapes
raise argparse.ArgumentTypeError(f'Invalid {name}: "{text}" [contains non-unicode characters]')
return text
return validator
comment_validator = text_validator(name="comment", max_length=10000)
def archivename_validator(text):
# we make sure that the archive name can be used as directory name (for borg mount)
MAX_PATH = 260 # Windows default. Since Win10, there is a registry setting LongPathsEnabled to get more.
MAX_DIRNAME = MAX_PATH - len("12345678.123")
SAFETY_MARGIN = 48 # borgfs path: mountpoint / archivename / dir / dir / ... / file
MAX_ARCHIVENAME = MAX_DIRNAME - SAFETY_MARGIN
invalid_ctrl_chars = "".join(chr(i) for i in range(32))
# note: ":" is also an invalid path char on windows, but we can not blacklist it,
# because e.g. our {now} placeholder creates ISO-8601 like output like 2022-12-10T20:47:42 .
invalid_chars = r"/" + r"\"<|>?*" # posix + windows
validate_text = text_validator(
name="archive name",
min_length=1,
max_length=MAX_ARCHIVENAME,
invalid_ctrl_chars=invalid_ctrl_chars,
invalid_chars=invalid_chars,
no_blanks=True,
)
return validate_text(text)
class BaseFormatter(metaclass=abc.ABCMeta):
format: str
static_data: Dict[str, Any]
FIXED_KEYS: ClassVar[Dict[str, str]] = {
# Formatting aids
"LF": "\n",
"SPACE": " ",
"TAB": "\t",
"CR": "\r",
"NUL": "\0",
"NEWLINE": "\n",
"NL": "\n", # \n is automatically converted to os.linesep on write
}
KEY_DESCRIPTIONS: ClassVar[Dict[str, str]] = {
"NEWLINE": "OS dependent line separator",
"NL": "alias of NEWLINE",
"NUL": "NUL character for creating print0 / xargs -0 like output",
"SPACE": "space character",
"TAB": "tab character",
"CR": "carriage return character",
"LF": "line feed character",
}
KEY_GROUPS: ClassVar[Tuple[Tuple[str, ...], ...]] = (("NEWLINE", "NL", "NUL", "SPACE", "TAB", "CR", "LF"),)
def __init__(self, format: str, static: Dict[str, Any]) -> None:
self.format = partial_format(format, static)
self.static_data = static
@abc.abstractmethod
def get_item_data(self, item, jsonline=False) -> dict:
raise NotImplementedError
def format_item(self, item, jsonline=False, sort=False):
data = self.get_item_data(item, jsonline)
return (
f"{json.dumps(data, cls=BorgJsonEncoder, sort_keys=sort)}\n" if jsonline else self.format.format_map(data)
)
@classmethod
def keys_help(cls):
help = []
keys: Set[str] = set()
keys.update(cls.KEY_DESCRIPTIONS.keys())
keys.update(key for group in cls.KEY_GROUPS for key in group)
for group in cls.KEY_GROUPS:
for key in group:
keys.remove(key)
text = "- " + key
if key in cls.KEY_DESCRIPTIONS:
text += ": " + cls.KEY_DESCRIPTIONS[key]
help.append(text)
help.append("")
assert not keys, str(keys)
return "\n".join(help)
class ArchiveFormatter(BaseFormatter):
KEY_DESCRIPTIONS = {
"archive": "archive name",
"name": 'alias of "archive"',
"comment": "archive comment",
# *start* is the key used by borg-info for this timestamp, this makes the formats more compatible
"start": "time (start) of creation of the archive",
"time": 'alias of "start"',
"end": "time (end) of creation of the archive",
"command_line": "command line which was used to create the archive",
"id": "internal ID of the archive",
"hostname": "hostname of host on which this archive was created",
"username": "username of user who created this archive",
"size": "size of this archive (data plus metadata, not considering compression and deduplication)",
"nfiles": "count of files in this archive",
}
KEY_GROUPS = (
("archive", "name", "comment", "id"),
("start", "time", "end", "command_line"),
("hostname", "username"),
("size", "nfiles"),
)
def __init__(self, format, repository, manifest, key, *, iec=False):
static_data = {} # here could be stuff on repo level, above archive level
static_data.update(self.FIXED_KEYS)
super().__init__(format, static_data)
self.repository = repository
self.manifest = manifest
self.key = key
self.name = None
self.id = None
self._archive = None
self.iec = iec
self.format_keys = {f[1] for f in Formatter().parse(format)}
self.call_keys = {
"hostname": partial(self.get_meta, "hostname", ""),
"username": partial(self.get_meta, "username", ""),
"comment": partial(self.get_meta, "comment", ""),
"command_line": partial(self.get_meta, "command_line", ""),
"size": partial(self.get_meta, "size", 0),
"nfiles": partial(self.get_meta, "nfiles", 0),
"end": self.get_ts_end,
}
self.used_call_keys = set(self.call_keys) & self.format_keys
def get_item_data(self, archive_info, jsonline=False):
self.name = archive_info.name
self.id = archive_info.id
item_data = {}
item_data.update({} if jsonline else self.static_data)
item_data.update(
{
"name": archive_info.name,
"archive": archive_info.name,
"id": bin_to_hex(archive_info.id),
"time": self.format_time(archive_info.ts),
"start": self.format_time(archive_info.ts),
}
)
for key in self.used_call_keys:
item_data[key] = self.call_keys[key]()
# Note: name and comment are validated, should never contain surrogate escapes.
# But unsure whether hostname, username, command_line could contain surrogate escapes, play safe:
for key in "hostname", "username", "command_line":
if key in item_data:
item_data.update(text_to_json(key, item_data[key]))
return item_data
@property
def archive(self):
"""lazy load / update loaded archive"""
if self._archive is None or self._archive.id != self.id:
from ..archive import Archive
self._archive = Archive(self.manifest, self.name, iec=self.iec)
return self._archive
def get_meta(self, key, default=None):
return self.archive.metadata.get(key, default)
def get_ts_end(self):
return self.format_time(self.archive.ts_end)
def format_time(self, ts):
return OutputTimestamp(ts)
class ItemFormatter(BaseFormatter):
# we provide the hash algos from python stdlib (except shake_*) and additionally xxh64.
# shake_* is not provided because it uses an incompatible .digest() method to support variable length.
hash_algorithms = set(hashlib.algorithms_guaranteed).union({"xxh64"}).difference({"shake_128", "shake_256"})
KEY_DESCRIPTIONS = {
"type": "file type (file, dir, symlink, ...)",
"mode": "file mode (as in stat)",
"uid": "user id of file owner",
"gid": "group id of file owner",
"user": "user name of file owner",
"group": "group name of file owner",
"path": "file path",
"target": "link target for symlinks",
"hlid": "hard link identity (same if hardlinking same fs object)",
"flags": "file flags",
"extra": 'prepends {target} with " -> " for soft links and " link to " for hard links',
"size": "file size",
"dsize": "deduplicated size",
"num_chunks": "number of chunks in this file",
"unique_chunks": "number of unique chunks in this file",
"mtime": "file modification time",
"ctime": "file change time",
"atime": "file access time",
"isomtime": "file modification time (ISO 8601 format)",
"isoctime": "file change time (ISO 8601 format)",
"isoatime": "file access time (ISO 8601 format)",
"xxh64": "XXH64 checksum of this file (note: this is NOT a cryptographic hash!)",
"health": 'either "healthy" (file ok) or "broken" (if file has all-zero replacement chunks)',
"archiveid": "internal ID of the archive",
"archivename": "name of the archive",
}
KEY_GROUPS = (
("type", "mode", "uid", "gid", "user", "group", "path", "target", "hlid", "flags"),
("size", "dsize", "num_chunks", "unique_chunks"),
("mtime", "ctime", "atime", "isomtime", "isoctime", "isoatime"),
tuple(sorted(hash_algorithms)),
("archiveid", "archivename", "extra"),
("health",),
)
KEYS_REQUIRING_CACHE = ("dsize", "unique_chunks")
@classmethod
def format_needs_cache(cls, format):
format_keys = {f[1] for f in Formatter().parse(format)}
return any(key in cls.KEYS_REQUIRING_CACHE for key in format_keys)
def __init__(self, archive, format):
from ..checksums import StreamingXXH64
static_data = {"archivename": archive.name, "archiveid": archive.fpr}
static_data.update(self.FIXED_KEYS)
super().__init__(format, static_data)
self.xxh64 = StreamingXXH64
self.archive = archive
self.format_keys = {f[1] for f in Formatter().parse(format)}
self.call_keys = {
"size": self.calculate_size,
"dsize": partial(self.sum_unique_chunks_metadata, lambda chunk: chunk.size),
"num_chunks": self.calculate_num_chunks,
"unique_chunks": partial(self.sum_unique_chunks_metadata, lambda chunk: 1),
"isomtime": partial(self.format_iso_time, "mtime"),
"isoctime": partial(self.format_iso_time, "ctime"),
"isoatime": partial(self.format_iso_time, "atime"),
"mtime": partial(self.format_time, "mtime"),
"ctime": partial(self.format_time, "ctime"),
"atime": partial(self.format_time, "atime"),
}
for hash_function in self.hash_algorithms:
self.call_keys[hash_function] = partial(self.hash_item, hash_function)
self.used_call_keys = set(self.call_keys) & self.format_keys
def get_item_data(self, item, jsonline=False):
item_data = {}
item_data.update({} if jsonline else self.static_data)
item_data.update(text_to_json("path", item.path))
target = item.get("target", "")
item_data.update(text_to_json("target", target))
if not jsonline:
item_data["extra"] = "" if not target else f" -> {item_data['target']}"
hlid = item.get("hlid")
hlid = bin_to_hex(hlid) if hlid else ""
item_data["hlid"] = hlid
mode = stat.filemode(item.mode)
item_type = mode[0]
item_data["type"] = item_type
item_data["mode"] = mode
item_data["uid"] = item.get("uid") # int or None
item_data["gid"] = item.get("gid") # int or None
item_data.update(text_to_json("user", item.get("user", str(item_data["uid"]))))
item_data.update(text_to_json("group", item.get("group", str(item_data["gid"]))))
if jsonline:
item_data["healthy"] = "chunks_healthy" not in item
else:
item_data["health"] = "broken" if "chunks_healthy" in item else "healthy"
item_data["flags"] = item.get("bsdflags") # int if flags known, else (if flags unknown) None
for key in self.used_call_keys:
item_data[key] = self.call_keys[key](item)
return item_data
def sum_unique_chunks_metadata(self, metadata_func, item):
"""
sum unique chunks metadata, a unique chunk is a chunk which is referenced globally as often as it is in the
item
item: The item to sum its unique chunks' metadata
metadata_func: A function that takes a parameter of type ChunkIndexEntry and returns a number, used to return
the metadata needed from the chunk
"""
chunk_index = self.archive.cache.chunks
chunks = item.get("chunks", [])
chunks_counter = Counter(c.id for c in chunks)
return sum(metadata_func(c) for c in chunks if chunk_index[c.id].refcount == chunks_counter[c.id])
def calculate_num_chunks(self, item):
return len(item.get("chunks", []))
def calculate_size(self, item):
# note: does not support hardlink slaves, they will be size 0
return item.get_size()
def hash_item(self, hash_function, item):
if "chunks" not in item:
return ""
if hash_function == "xxh64":
hash = self.xxh64()
elif hash_function in self.hash_algorithms:
hash = hashlib.new(hash_function)
for data in self.archive.pipeline.fetch_many([c.id for c in item.chunks], ro_type=ROBJ_FILE_STREAM):
hash.update(data)
return hash.hexdigest()
def format_time(self, key, item):
return OutputTimestamp(safe_timestamp(item.get(key) or item.mtime))
def format_iso_time(self, key, item):
return self.format_time(key, item).isoformat()
class DiffFormatter(BaseFormatter):
KEY_DESCRIPTIONS = {
"path": "archived file path",
"change": "all available changes",
"content": "file content change",
"mode": "file mode change",
"type": "file type change",
"owner": "file owner (user/group) change",
"user": "file user change",
"group": "file group change",
"link": "file link change",
"directory": "file directory change",
"blkdev": "file block device change",
"chrdev": "file character device change",
"fifo": "file fifo change",
"mtime": "file modification time change",
"ctime": "file change time change",
"isomtime": "file modification time change (ISO 8601)",
"isoctime": "file creation time change (ISO 8601)",
}
KEY_GROUPS = (
("path", "change"),
("content", "mode", "type", "owner", "group", "user"),
("link", "directory", "blkdev", "chrdev", "fifo"),
("mtime", "ctime", "isomtime", "isoctime"),
)
METADATA = ("mode", "type", "owner", "group", "user", "mtime", "ctime")
def __init__(self, format, content_only=False):
static_data = {}
static_data.update(self.FIXED_KEYS)
super().__init__(format or "{content}{link}{directory}{blkdev}{chrdev}{fifo} {path}{NL}", static_data)
self.content_only = content_only
self.format_keys = {f[1] for f in Formatter().parse(format)}
self.call_keys = {
"content": self.format_content,
"mode": self.format_mode,
"type": partial(self.format_mode, filetype=True),
"owner": partial(self.format_owner),
"group": partial(self.format_owner, spec="group"),
"user": partial(self.format_owner, spec="user"),
"link": partial(self.format_other, "link"),
"directory": partial(self.format_other, "directory"),
"blkdev": partial(self.format_other, "blkdev"),
"chrdev": partial(self.format_other, "chrdev"),
"fifo": partial(self.format_other, "fifo"),
"mtime": partial(self.format_time, "mtime"),
"ctime": partial(self.format_time, "ctime"),
"isomtime": partial(self.format_iso_time, "mtime"),
"isoctime": partial(self.format_iso_time, "ctime"),
}
self.used_call_keys = set(self.call_keys) & self.format_keys
if self.content_only:
self.used_call_keys -= set(self.METADATA)
def get_item_data(self, item: "ItemDiff", jsonline=False) -> dict:
diff_data = {}
for key in self.used_call_keys:
diff_data[key] = self.call_keys[key](item)
change = []
for key in self.call_keys:
if key in ("isomtime", "isoctime"):
continue
if self.content_only and key in self.METADATA:
continue
change.append(self.call_keys[key](item))
diff_data["change"] = " ".join([v for v in change if v])
diff_data["path"] = item.path
diff_data.update({} if jsonline else self.static_data)
return diff_data
def format_other(self, key, diff: "ItemDiff"):
change = diff.changes().get(key)
return f"{change.diff_type}".ljust(27) if change else "" # 27 is the length of the content change
def format_mode(self, diff: "ItemDiff", filetype=False):
change = diff.type() if filetype else diff.mode()
return f"[{change.diff_data['item1']} -> {change.diff_data['item2']}]" if change else ""
def format_owner(self, diff: "ItemDiff", spec: Literal["owner", "user", "group"] = "owner"):
if spec == "user":
change = diff.user()
return f"[{change.diff_data['item1']} -> {change.diff_data['item2']}]" if change else ""
if spec == "group":
change = diff.group()
return f"[{change.diff_data['item1']} -> {change.diff_data['item2']}]" if change else ""
if spec != "owner":
raise ValueError(f"Invalid owner spec: {spec}")
change = diff.owner()
if change:
return "[{}:{} -> {}:{}]".format(
change.diff_data["item1"][0],
change.diff_data["item1"][1],
change.diff_data["item2"][0],
change.diff_data["item2"][1],
)
return ""
def format_content(self, diff: "ItemDiff"):
change = diff.content()
if change:
if change.diff_type == "added":
return "{}: {:>20}".format(change.diff_type, format_file_size(change.diff_data["added"]))
if change.diff_type == "removed":
return "{}: {:>18}".format(change.diff_type, format_file_size(change.diff_data["removed"]))
if "added" not in change.diff_data and "removed" not in change.diff_data:
return "modified: (can't get size)"
return "{}: {:>8} {:>8}".format(
change.diff_type,
format_file_size(change.diff_data["added"], precision=1, sign=True),
format_file_size(-change.diff_data["removed"], precision=1, sign=True),
)
return ""
def format_time(self, key, diff: "ItemDiff"):
change = diff.changes().get(key)
return f"[{key}: {change.diff_data['item1']} -> {change.diff_data['item2']}]" if change else ""
def format_iso_time(self, key, diff: "ItemDiff"):
change = diff.changes().get(key)
return (
f"[{key}: {change.diff_data['item1'].isoformat()} -> {change.diff_data['item2'].isoformat()}]"
if change
else ""
)
def file_status(mode):
if stat.S_ISREG(mode):
return "A"
elif stat.S_ISDIR(mode):
return "d"
elif stat.S_ISBLK(mode):
return "b"
elif stat.S_ISCHR(mode):
return "c"
elif stat.S_ISLNK(mode):
return "s"
elif stat.S_ISFIFO(mode):
return "f"
return "?"
def clean_lines(lines, lstrip=None, rstrip=None, remove_empty=True, remove_comments=True):
"""
clean lines (usually read from a config file):
1. strip whitespace (left and right), 2. remove empty lines, 3. remove comments.
note: only "pure comment lines" are supported, no support for "trailing comments".
:param lines: input line iterator (e.g. list or open text file) that gives unclean input lines
:param lstrip: lstrip call arguments or False, if lstripping is not desired
:param rstrip: rstrip call arguments or False, if rstripping is not desired
:param remove_comments: remove comment lines (lines starting with "#")
:param remove_empty: remove empty lines
:return: yields processed lines
"""
for line in lines:
if lstrip is not False:
line = line.lstrip(lstrip)
if rstrip is not False:
line = line.rstrip(rstrip)
if remove_empty and not line:
continue
if remove_comments and line.startswith("#"):
continue
yield line
def swidth_slice(string, max_width):
"""
Return a slice of *max_width* cells from *string*.
Negative *max_width* means from the end of string.
*max_width* is in units of character cells (or "columns").
Latin characters are usually one cell wide, many CJK characters are two cells wide.
"""
from ..platform import swidth
reverse = max_width < 0
max_width = abs(max_width)
if reverse:
string = reversed(string)
current_swidth = 0
result = []
for character in string:
current_swidth += swidth(character)
if current_swidth > max_width:
break
result.append(character)
if reverse:
result.reverse()
return "".join(result)
def ellipsis_truncate(msg, space):
"""
shorten a long string by adding ellipsis between it and return it, example:
this_is_a_very_long_string -------> this_is..._string
"""
from ..platform import swidth
ellipsis_width = swidth("...")
msg_width = swidth(msg)
if space < 8:
# if there is very little space, just show ...
return "..." + " " * (space - ellipsis_width)
if space < ellipsis_width + msg_width:
return f"{swidth_slice(msg, space // 2 - ellipsis_width)}...{swidth_slice(msg, -space // 2)}"
return msg + " " * (space - msg_width)
class BorgJsonEncoder(json.JSONEncoder):
def default(self, o):
from ..repository import Repository
from ..remote import RemoteRepository
from ..archive import Archive
from ..cache import LocalCache, AdHocCache
if isinstance(o, Repository) or isinstance(o, RemoteRepository):
return {"id": bin_to_hex(o.id), "location": o._location.canonical_path()}
if isinstance(o, Archive):
return o.info()
if isinstance(o, LocalCache):
return {"path": o.path, "stats": o.stats()}
if isinstance(o, AdHocCache):
return {"stats": o.stats()}
if callable(getattr(o, "to_json", None)):
return o.to_json()
return super().default(o)
def basic_json_data(manifest, *, cache=None, extra=None):
key = manifest.key
data = extra or {}
data.update({"repository": BorgJsonEncoder().default(manifest.repository), "encryption": {"mode": key.ARG_NAME}})
data["repository"]["last_modified"] = OutputTimestamp(manifest.last_timestamp)
if key.NAME.startswith("key file"):
data["encryption"]["keyfile"] = key.find_key()
if cache:
data["cache"] = cache
return data
def json_dump(obj):
"""Dump using BorgJSONEncoder."""
return json.dumps(obj, sort_keys=True, indent=4, cls=BorgJsonEncoder)
def json_print(obj):
print(json_dump(obj))
def prepare_dump_dict(d):
def decode_bytes(value):
# this should somehow be reversible later, but usual strings should
# look nice and chunk ids should mostly show in hex. Use a special
# inband signaling character (ASCII DEL) to distinguish between
# decoded and hex mode.
if not value.startswith(b"\x7f"):
try:
value = value.decode()
return value
except UnicodeDecodeError:
pass
return "\u007f" + bin_to_hex(value)
def decode_tuple(t):
res = []
for value in t:
if isinstance(value, dict):
value = decode(value)
elif isinstance(value, tuple) or isinstance(value, list):
value = decode_tuple(value)
elif isinstance(value, bytes):
value = decode_bytes(value)
res.append(value)
return res
def decode(d):
res = OrderedDict()
for key, value in d.items():
if isinstance(value, dict):
value = decode(value)
elif isinstance(value, (tuple, list)):
value = decode_tuple(value)
elif isinstance(value, bytes):
value = decode_bytes(value)
elif isinstance(value, Timestamp):
value = value.to_unix_nano()
if isinstance(key, bytes):
key = key.decode()
res[key] = value
return res
return decode(d)
class Highlander(argparse.Action):
"""make sure some option is only given once"""
def __init__(self, *args, **kwargs):
self.__called = False
super().__init__(*args, **kwargs)
def __call__(self, parser, namespace, values, option_string=None):
if self.__called:
raise argparse.ArgumentError(self, "There can be only one.")
self.__called = True
setattr(namespace, self.dest, values)
class MakePathSafeAction(Highlander):
def __call__(self, parser, namespace, path, option_string=None):
try:
sanitized_path = make_path_safe(path)
except ValueError as e:
raise argparse.ArgumentError(self, e)
if sanitized_path == ".":
raise argparse.ArgumentError(self, f"{path!r} is not a valid file name")
setattr(namespace, self.dest, sanitized_path)