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# This module is part of GitPython and is released under the

# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/

__all__ = [

"sm_section",

"sm_name",

"mkhead",

"find_first_remote_branch",

"SubmoduleConfigParser",

]

from io import BytesIO

import weakref

import git

from git.config import GitConfigParser

from git.exc import InvalidGitRepositoryError

# typing -----------------------------------------------------------------------

from typing import Any, Sequence, TYPE_CHECKING, Union

from git.types import PathLike

if TYPE_CHECKING:

from weakref import ReferenceType

from git.refs import Head, RemoteReference

from git.remote import Remote

from git.repo import Repo

from .base import Submodule

# { Utilities

def sm_section(name: str) -> str:

""":return: Section title used in ``.gitmodules`` configuration file"""

return f'submodule "{name}"'

def sm_name(section: str) -> str:

""":return: Name of the submodule as parsed from the section name"""

section = section.strip()

return section[11:-1]

def mkhead(repo: "Repo", path: PathLike) -> "Head":

""":return: New branch/head instance"""

return git.Head(repo, git.Head.to_full_path(path))

def find_first_remote_branch(remotes: Sequence["Remote"], branch_name: str) -> "RemoteReference":

"""Find the remote branch matching the name of the given branch or raise

:exc:`~git.exc.InvalidGitRepositoryError`."""

for remote in remotes:

try:

return remote.refs[branch_name]

except IndexError:

continue

# END exception handling

# END for remote

raise InvalidGitRepositoryError("Didn't find remote branch '%r' in any of the given remotes" % branch_name)

# } END utilities

# { Classes

class SubmoduleConfigParser(GitConfigParser):

"""Catches calls to :meth:`~git.config.GitConfigParser.write`, and updates the

``.gitmodules`` blob in the index with the new data, if we have written into a

stream.

Otherwise it would add the local file to the index to make it correspond with the

working tree. Additionally, the cache must be cleared.

Please note that no mutating method will work in bare mode.

"""

def __init__(self, *args: Any, **kwargs: Any) -> None:

self._smref: Union["ReferenceType[Submodule]", None] = None

self._index = None

self._auto_write = True

super().__init__(*args, **kwargs)

# { Interface

def set_submodule(self, submodule: "Submodule") -> None:

"""Set this instance's submodule. It must be called before the first write

operation begins."""

self._smref = weakref.ref(submodule)

def flush_to_index(self) -> None:

"""Flush changes in our configuration file to the index."""

assert self._smref is not None

# Should always have a file here.

assert not isinstance(self._file_or_files, BytesIO)

sm = self._smref()

if sm is not None:

index = self._index

if index is None:

index = sm.repo.index

# END handle index

index.add([sm.k_modules_file], write=self._auto_write)

sm._clear_cache()

# END handle weakref

# } END interface

# { Overridden Methods

def write(self) -> None: # type: ignore[override]

rval: None = super().write()

self.flush_to_index()

return rval

# END overridden methods

# } END classes

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