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from git.util import (
LazyMixin,
IterableObj,
)
from .symbolic import SymbolicReference, T_References
# typing ------------------------------------------------------------------
from typing import Any, Callable, Iterator, Type, Union, TYPE_CHECKING # NOQA
from git.types import Commit_ish, PathLike, _T # NOQA
if TYPE_CHECKING:
from git.repo import Repo
# ------------------------------------------------------------------------------
__all__ = ["Reference"]
# { Utilities
def require_remote_ref_path(func: Callable[..., _T]) -> Callable[..., _T]:
"""A decorator raising a TypeError if we are not a valid remote, based on the path"""
def wrapper(self: T_References, *args: Any) -> _T:
if not self.is_remote():
raise ValueError("ref path does not point to a remote reference: %s" % self.path)
return func(self, *args)
# END wrapper
wrapper.__name__ = func.__name__
return wrapper
# }END utilities
class Reference(SymbolicReference, LazyMixin, IterableObj):
"""Represents a named reference to any object. Subclasses may apply restrictions though,
i.e. Heads can only point to commits."""
__slots__ = ()
_points_to_commits_only = False
_resolve_ref_on_create = True
_common_path_default = "refs"
def __init__(self, repo: "Repo", path: PathLike, check_path: bool = True) -> None:
"""Initialize this instance
:param repo: Our parent repository
:param path:
Path relative to the .git/ directory pointing to the ref in question, i.e.
refs/heads/master
:param check_path: if False, you can provide any path. Otherwise the path must start with the
default path prefix of this type."""
if check_path and not str(path).startswith(self._common_path_default + "/"):
raise ValueError(f"Cannot instantiate {self.__class__.__name__!r} from path {path}")
self.path: str # SymbolicReference converts to string atm
super(Reference, self).__init__(repo, path)
def __str__(self) -> str:
return self.name
# { Interface
# @ReservedAssignment
def set_object(
self,
object: Union[Commit_ish, "SymbolicReference", str],
logmsg: Union[str, None] = None,
) -> "Reference":
"""Special version which checks if the head-log needs an update as well
:return: self"""
oldbinsha = None
if logmsg is not None:
head = self.repo.head
if not head.is_detached and head.ref == self:
oldbinsha = self.commit.binsha
# END handle commit retrieval
# END handle message is set
super(Reference, self).set_object(object, logmsg)
if oldbinsha is not None:
# /* from refs.c in git-source
# * Special hack: If a branch is updated directly and HEAD
# * points to it (may happen on the remote side of a push
# * for example) then logically the HEAD reflog should be
# * updated too.
# * A generic solution implies reverse symref information,
# * but finding all symrefs pointing to the given branch
# * would be rather costly for this rare event (the direct
# * update of a branch) to be worth it. So let's cheat and
# * check with HEAD only which should cover 99% of all usage
# * scenarios (even 100% of the default ones).
# */
self.repo.head.log_append(oldbinsha, logmsg)
# END check if the head
return self
# NOTE: Don't have to overwrite properties as the will only work without a the log
@property
def name(self) -> str:
""":return: (shortest) Name of this reference - it may contain path components"""
# first two path tokens are can be removed as they are
# refs/heads or refs/tags or refs/remotes
tokens = self.path.split("/")
if len(tokens) < 3:
return self.path # could be refs/HEAD
return "/".join(tokens[2:])
@classmethod
def iter_items(
cls: Type[T_References],
repo: "Repo",
common_path: Union[PathLike, None] = None,
*args: Any,
**kwargs: Any,
) -> Iterator[T_References]:
"""Equivalent to SymbolicReference.iter_items, but will return non-detached
references as well."""
return cls._iter_items(repo, common_path)
# }END interface
# { Remote Interface
@property # type: ignore ## mypy cannot deal with properties with an extra decorator (2021-04-21)
@require_remote_ref_path
def remote_name(self) -> str:
"""
:return:
Name of the remote we are a reference of, such as 'origin' for a reference
named 'origin/master'"""
tokens = self.path.split("/")
# /refs/remotes/<remote name>/<branch_name>
return tokens[2]
@property # type: ignore ## mypy cannot deal with properties with an extra decorator (2021-04-21)
@require_remote_ref_path
def remote_head(self) -> str:
""":return: Name of the remote head itself, i.e. master.
:note: The returned name is usually not qualified enough to uniquely identify
a branch"""
tokens = self.path.split("/")
return "/".join(tokens[3:])
# } END remote interface
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