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import re
import os
import itertools
from collections import defaultdict
MYPY = False
if MYPY:
# MYPY is set to True when run under Mypy.
from typing import Any
from typing import Dict
from typing import Iterable
from typing import List
from typing import MutableMapping
from typing import Optional
from typing import Pattern
from typing import Tuple
from typing import TypeVar
from typing import Union
from typing import cast
T = TypeVar('T')
end_space = re.compile(r"([^\\]\s)*$")
def fnmatch_translate(pat):
# type: (bytes) -> Tuple[bool, Pattern[bytes]]
parts = []
seq = None # type: Optional[int]
i = 0
any_char = b"[^/]"
if pat[0:1] == b"/":
parts.append(b"^")
pat = pat[1:]
else:
# By default match the entire path up to a /
# but if / doesn't appear in the pattern we will mark is as
# a name pattern and just produce a pattern that matches against
# the filename
parts.append(b"^(?:.*/)?")
name_pattern = True
if pat[-1:] == b"/":
# If the last character is / match this directory or any subdirectory
pat = pat[:-1]
suffix = b"(?:/|$)"
else:
suffix = b"$"
while i < len(pat):
c = pat[i:i+1]
if c == b"\\":
if i < len(pat) - 1:
i += 1
c = pat[i:i+1]
parts.append(re.escape(c))
else:
raise ValueError
elif seq is not None:
# TODO: this doesn't really handle invalid sequences in the right way
if c == b"]":
seq = None
if parts[-1] == b"[":
parts = parts[:-1]
elif parts[-1] == b"^" and parts[-2] == b"[":
raise ValueError
else:
parts.append(c)
elif c == b"-":
parts.append(c)
elif c == b"[":
raise ValueError
else:
parts.append(re.escape(c))
elif c == b"[":
parts.append(b"[")
if i < len(pat) - 1 and pat[i+1:i+2] in (b"!", b"^"):
parts.append(b"^")
i += 1
seq = i
elif c == b"*":
if i < len(pat) - 1 and pat[i+1:i+2] == b"*":
if i > 0 and pat[i-1:i] != b"/":
raise ValueError
parts.append(b".*")
i += 1
if i < len(pat) - 1 and pat[i+1:i+2] != b"/":
raise ValueError
else:
parts.append(any_char + b"*")
elif c == b"?":
parts.append(any_char)
elif c == b"/" and not seq:
name_pattern = False
parts.append(c)
else:
parts.append(re.escape(c))
i += 1
if name_pattern:
parts[0] = b"^"
if seq is not None:
raise ValueError
parts.append(suffix)
try:
return name_pattern, re.compile(b"".join(parts))
except Exception:
raise ValueError
# Regexp matching rules that have to be converted to patterns
pattern_re = re.compile(br".*[\*\[\?]")
def parse_line(line):
# type: (bytes) -> Optional[Tuple[bool, bool, bool, Union[Tuple[bytes, ...], Tuple[bool, Pattern[bytes]]]]]
line = line.rstrip()
if not line or line[0:1] == b"#":
return None
invert = line[0:1] == b"!"
if invert:
line = line[1:]
dir_only = line[-1:] == b"/"
if dir_only:
line = line[:-1]
# Could make a special case for **/foo, but we don't have any patterns like that
if not invert and not pattern_re.match(line):
literal = True
pattern = tuple(line.rsplit(b"/", 1)) # type: Union[Tuple[bytes, ...], Tuple[bool, Pattern[bytes]]]
else:
pattern = fnmatch_translate(line)
literal = False
return invert, dir_only, literal, pattern
class PathFilter:
def __init__(self, root, extras=None, cache=None):
# type: (bytes, Optional[List[bytes]], Optional[MutableMapping[bytes, bool]]) -> None
if root:
ignore_path = os.path.join(root, b".gitignore") # type: Optional[bytes]
else:
ignore_path = None
if not ignore_path and not extras:
self.trivial = True
return
self.trivial = False
self.literals_file = defaultdict(dict) # type: Dict[Optional[bytes], Dict[bytes, List[Tuple[bool, Pattern[bytes]]]]]
self.literals_dir = defaultdict(dict) # type: Dict[Optional[bytes], Dict[bytes, List[Tuple[bool, Pattern[bytes]]]]]
self.patterns_file = [] # type: List[Tuple[Tuple[bool, Pattern[bytes]], List[Tuple[bool, Pattern[bytes]]]]]
self.patterns_dir = [] # type: List[Tuple[Tuple[bool, Pattern[bytes]], List[Tuple[bool, Pattern[bytes]]]]]
if cache is None:
cache = {}
self.cache = cache # type: MutableMapping[bytes, bool]
if extras is None:
extras = []
if ignore_path and os.path.exists(ignore_path):
args = ignore_path, extras # type: Tuple[Optional[bytes], List[bytes]]
else:
args = None, extras
self._read_ignore(*args)
def _read_ignore(self, ignore_path, extras):
# type: (Optional[bytes], List[bytes]) -> None
if ignore_path is not None:
with open(ignore_path, "rb") as f:
for line in f:
self._read_line(line)
for line in extras:
self._read_line(line)
def _read_line(self, line):
# type: (bytes) -> None
parsed = parse_line(line)
if not parsed:
return
invert, dir_only, literal, rule = parsed
if invert:
# For exclude rules, we attach the rules to all preceeding patterns, so
# that we can match patterns out of order and check if they were later
# overriden by an exclude rule
assert not literal
if MYPY:
rule = cast(Tuple[bool, Pattern[bytes]], rule)
if not dir_only:
rules_iter = itertools.chain(
itertools.chain(*(item.items() for item in self.literals_dir.values())),
itertools.chain(*(item.items() for item in self.literals_file.values())),
self.patterns_dir,
self.patterns_file) # type: Iterable[Tuple[Any, List[Tuple[bool, Pattern[bytes]]]]]
else:
rules_iter = itertools.chain(
itertools.chain(*(item.items() for item in self.literals_dir.values())),
self.patterns_dir)
for rules in rules_iter:
rules[1].append(rule)
else:
if literal:
if MYPY:
rule = cast(Tuple[bytes, ...], rule)
if len(rule) == 1:
dir_name, pattern = None, rule[0] # type: Tuple[Optional[bytes], bytes]
else:
dir_name, pattern = rule
self.literals_dir[dir_name][pattern] = []
if not dir_only:
self.literals_file[dir_name][pattern] = []
else:
if MYPY:
rule = cast(Tuple[bool, Pattern[bytes]], rule)
self.patterns_dir.append((rule, []))
if not dir_only:
self.patterns_file.append((rule, []))
def filter(self,
iterator # type: Iterable[Tuple[bytes, List[Tuple[bytes, T]], List[Tuple[bytes, T]]]]
):
# type: (...) -> Iterable[Tuple[bytes, List[Tuple[bytes, T]], List[Tuple[bytes, T]]]]
empty = {} # type: Dict[Any, Any]
for dirpath, dirnames, filenames in iterator:
orig_dirpath = dirpath
path_sep = os.path.sep.encode()
if path_sep != b"/":
dirpath = dirpath.replace(path_sep, b"/")
keep_dirs = [] # type: List[Tuple[bytes, T]]
keep_files = [] # type: List[Tuple[bytes, T]]
for iter_items, literals, patterns, target, suffix in [
(dirnames, self.literals_dir, self.patterns_dir, keep_dirs, b"/"),
(filenames, self.literals_file, self.patterns_file, keep_files, b"")]:
for item in iter_items:
name = item[0]
if dirpath:
path = b"%s/%s" % (dirpath, name) + suffix
else:
path = name + suffix
if path in self.cache:
if not self.cache[path]:
target.append(item)
continue
for rule_dir in [None, dirpath if dirpath != b"." else b""]:
if name in literals.get(rule_dir, empty):
exclude = literals[rule_dir][name]
if not any(rule.match(name if name_only else path)
for name_only, rule in exclude):
# Skip this item
self.cache[path] = True
break
else:
for (component_only, pattern), exclude in patterns:
if component_only:
match = pattern.match(name)
else:
match = pattern.match(path)
if match:
if not any(rule.match(name if name_only else path)
for name_only, rule in exclude):
# Skip this item
self.cache[path] = True
break
else:
self.cache[path] = False
target.append(item)
dirnames[:] = keep_dirs
assert not any(b".git" == name for name, _ in dirnames)
yield orig_dirpath, dirnames, keep_files
def __call__(self,
iterator # type: Iterable[Tuple[bytes, List[Tuple[bytes, T]], List[Tuple[bytes, T]]]]
):
# type: (...) -> Iterable[Tuple[bytes, List[Tuple[bytes, T]], List[Tuple[bytes, T]]]]
if self.trivial:
return iterator
return self.filter(iterator)
def has_ignore(dirpath):
# type: (bytes) -> bool
return os.path.exists(os.path.join(dirpath, b".gitignore"))
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