192 lines
6.1 KiB
Python
192 lines
6.1 KiB
Python
"""Module with additional types used by the index"""
|
|
|
|
from binascii import b2a_hex
|
|
from pathlib import Path
|
|
|
|
from .util import pack, unpack
|
|
from git.objects import Blob
|
|
|
|
|
|
# typing ----------------------------------------------------------------------
|
|
|
|
from typing import NamedTuple, Sequence, TYPE_CHECKING, Tuple, Union, cast, List
|
|
|
|
from git.types import PathLike
|
|
|
|
if TYPE_CHECKING:
|
|
from git.repo import Repo
|
|
|
|
StageType = int
|
|
|
|
# ---------------------------------------------------------------------------------
|
|
|
|
__all__ = ("BlobFilter", "BaseIndexEntry", "IndexEntry", "StageType")
|
|
|
|
# { Invariants
|
|
CE_NAMEMASK = 0x0FFF
|
|
CE_STAGEMASK = 0x3000
|
|
CE_EXTENDED = 0x4000
|
|
CE_VALID = 0x8000
|
|
CE_STAGESHIFT = 12
|
|
|
|
# } END invariants
|
|
|
|
|
|
class BlobFilter(object):
|
|
|
|
"""
|
|
Predicate to be used by iter_blobs allowing to filter only return blobs which
|
|
match the given list of directories or files.
|
|
|
|
The given paths are given relative to the repository.
|
|
"""
|
|
|
|
__slots__ = "paths"
|
|
|
|
def __init__(self, paths: Sequence[PathLike]) -> None:
|
|
"""
|
|
:param paths:
|
|
tuple or list of paths which are either pointing to directories or
|
|
to files relative to the current repository
|
|
"""
|
|
self.paths = paths
|
|
|
|
def __call__(self, stage_blob: Tuple[StageType, Blob]) -> bool:
|
|
blob_pathlike: PathLike = stage_blob[1].path
|
|
blob_path: Path = blob_pathlike if isinstance(blob_pathlike, Path) else Path(blob_pathlike)
|
|
for pathlike in self.paths:
|
|
path: Path = pathlike if isinstance(pathlike, Path) else Path(pathlike)
|
|
# TODO: Change to use `PosixPath.is_relative_to` once Python 3.8 is no longer supported.
|
|
filter_parts: List[str] = path.parts
|
|
blob_parts: List[str] = blob_path.parts
|
|
if len(filter_parts) > len(blob_parts):
|
|
continue
|
|
if all(i == j for i, j in zip(filter_parts, blob_parts)):
|
|
return True
|
|
return False
|
|
|
|
|
|
class BaseIndexEntryHelper(NamedTuple):
|
|
"""Typed namedtuple to provide named attribute access for BaseIndexEntry.
|
|
Needed to allow overriding __new__ in child class to preserve backwards compat."""
|
|
|
|
mode: int
|
|
binsha: bytes
|
|
flags: int
|
|
path: PathLike
|
|
ctime_bytes: bytes = pack(">LL", 0, 0)
|
|
mtime_bytes: bytes = pack(">LL", 0, 0)
|
|
dev: int = 0
|
|
inode: int = 0
|
|
uid: int = 0
|
|
gid: int = 0
|
|
size: int = 0
|
|
|
|
|
|
class BaseIndexEntry(BaseIndexEntryHelper):
|
|
|
|
"""Small Brother of an index entry which can be created to describe changes
|
|
done to the index in which case plenty of additional information is not required.
|
|
|
|
As the first 4 data members match exactly to the IndexEntry type, methods
|
|
expecting a BaseIndexEntry can also handle full IndexEntries even if they
|
|
use numeric indices for performance reasons.
|
|
"""
|
|
|
|
def __new__(
|
|
cls,
|
|
inp_tuple: Union[
|
|
Tuple[int, bytes, int, PathLike],
|
|
Tuple[int, bytes, int, PathLike, bytes, bytes, int, int, int, int, int],
|
|
],
|
|
) -> "BaseIndexEntry":
|
|
"""Override __new__ to allow construction from a tuple for backwards compatibility"""
|
|
return super().__new__(cls, *inp_tuple)
|
|
|
|
def __str__(self) -> str:
|
|
return "%o %s %i\t%s" % (self.mode, self.hexsha, self.stage, self.path)
|
|
|
|
def __repr__(self) -> str:
|
|
return "(%o, %s, %i, %s)" % (self.mode, self.hexsha, self.stage, self.path)
|
|
|
|
@property
|
|
def hexsha(self) -> str:
|
|
"""hex version of our sha"""
|
|
return b2a_hex(self.binsha).decode("ascii")
|
|
|
|
@property
|
|
def stage(self) -> int:
|
|
"""Stage of the entry, either:
|
|
|
|
* 0 = default stage
|
|
* 1 = stage before a merge or common ancestor entry in case of a 3 way merge
|
|
* 2 = stage of entries from the 'left' side of the merge
|
|
* 3 = stage of entries from the right side of the merge
|
|
|
|
:note: For more information, see http://www.kernel.org/pub/software/scm/git/docs/git-read-tree.html
|
|
"""
|
|
return (self.flags & CE_STAGEMASK) >> CE_STAGESHIFT
|
|
|
|
@classmethod
|
|
def from_blob(cls, blob: Blob, stage: int = 0) -> "BaseIndexEntry":
|
|
""":return: Fully equipped BaseIndexEntry at the given stage"""
|
|
return cls((blob.mode, blob.binsha, stage << CE_STAGESHIFT, blob.path))
|
|
|
|
def to_blob(self, repo: "Repo") -> Blob:
|
|
""":return: Blob using the information of this index entry"""
|
|
return Blob(repo, self.binsha, self.mode, self.path)
|
|
|
|
|
|
class IndexEntry(BaseIndexEntry):
|
|
|
|
"""Allows convenient access to IndexEntry data without completely unpacking it.
|
|
|
|
Attributes usully accessed often are cached in the tuple whereas others are
|
|
unpacked on demand.
|
|
|
|
See the properties for a mapping between names and tuple indices."""
|
|
|
|
@property
|
|
def ctime(self) -> Tuple[int, int]:
|
|
"""
|
|
:return:
|
|
Tuple(int_time_seconds_since_epoch, int_nano_seconds) of the
|
|
file's creation time"""
|
|
return cast(Tuple[int, int], unpack(">LL", self.ctime_bytes))
|
|
|
|
@property
|
|
def mtime(self) -> Tuple[int, int]:
|
|
"""See ctime property, but returns modification time"""
|
|
return cast(Tuple[int, int], unpack(">LL", self.mtime_bytes))
|
|
|
|
@classmethod
|
|
def from_base(cls, base: "BaseIndexEntry") -> "IndexEntry":
|
|
"""
|
|
:return:
|
|
Minimal entry as created from the given BaseIndexEntry instance.
|
|
Missing values will be set to null-like values
|
|
|
|
:param base: Instance of type BaseIndexEntry"""
|
|
time = pack(">LL", 0, 0)
|
|
return IndexEntry((base.mode, base.binsha, base.flags, base.path, time, time, 0, 0, 0, 0, 0))
|
|
|
|
@classmethod
|
|
def from_blob(cls, blob: Blob, stage: int = 0) -> "IndexEntry":
|
|
""":return: Minimal entry resembling the given blob object"""
|
|
time = pack(">LL", 0, 0)
|
|
return IndexEntry(
|
|
(
|
|
blob.mode,
|
|
blob.binsha,
|
|
stage << CE_STAGESHIFT,
|
|
blob.path,
|
|
time,
|
|
time,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
blob.size,
|
|
)
|
|
)
|