# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors

#

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

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

import sys

__all__ = [

"stream_copy",

"join_path",

"to_native_path_linux",

"join_path_native",

"Stats",

"IndexFileSHA1Writer",

"IterableObj",

"IterableList",

"BlockingLockFile",

"LockFile",

"Actor",

"get_user_id",

"assure_directory_exists",

"RemoteProgress",

"CallableRemoteProgress",

"rmtree",

"unbare_repo",

"HIDE_WINDOWS_KNOWN_ERRORS",

]

if sys.platform == "win32":

__all__.append("to_native_path_windows")

from abc import abstractmethod

import contextlib

from functools import wraps

import getpass

import logging

import os

import os.path as osp

from pathlib import Path

import platform

import re

import shutil

import stat

import subprocess

import time

from urllib.parse import urlsplit, urlunsplit

import warnings

# NOTE: Unused imports can be improved now that CI testing has fully resumed. Some of

# these be used indirectly through other GitPython modules, which avoids having to write

# gitdb all the time in their imports. They are not in __all__, at least currently,

# because they could be removed or changed at any time, and so should not be considered

# conceptually public to code outside GitPython. Linters of course do not like it.

from gitdb.util import (

LazyMixin, # noqa: F401

LockedFD, # noqa: F401

bin_to_hex, # noqa: F401

file_contents_ro, # noqa: F401

file_contents_ro_filepath, # noqa: F401

hex_to_bin, # noqa: F401

make_sha,

to_bin_sha, # noqa: F401

to_hex_sha, # noqa: F401

)

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

from typing import (

Any,

AnyStr,

BinaryIO,

Callable,

Dict,

Generator,

IO,

Iterator,

List,

Optional,

Pattern,

Sequence,

Tuple,

TYPE_CHECKING,

TypeVar,

Union,

cast,

overload,

)

if TYPE_CHECKING:

from git.cmd import Git

from git.config import GitConfigParser, SectionConstraint

from git.remote import Remote

from git.repo.base import Repo

from git.types import (

Files_TD,

Has_id_attribute,

HSH_TD,

Literal,

PathLike,

Protocol,

SupportsIndex,

Total_TD,

runtime_checkable,

)

# ---------------------------------------------------------------------

T_IterableObj = TypeVar("T_IterableObj", bound=Union["IterableObj", "Has_id_attribute"], covariant=True)

# So IterableList[Head] is subtype of IterableList[IterableObj].

_logger = logging.getLogger(__name__)

def _read_env_flag(name: str, default: bool) -> bool:

"""Read a boolean flag from an environment variable.

:return:

The flag, or the `default` value if absent or ambiguous.

"""

try:

value = os.environ[name]

except KeyError:

return default

_logger.warning(

"The %s environment variable is deprecated. Its effect has never been documented and changes without warning.",

name,

)

adjusted_value = value.strip().lower()

if adjusted_value in {"", "0", "false", "no"}:

return False

if adjusted_value in {"1", "true", "yes"}:

return True

_logger.warning("%s has unrecognized value %r, treating as %r.", name, value, default)

return default

def _read_win_env_flag(name: str, default: bool) -> bool:

"""Read a boolean flag from an environment variable on Windows.

:return:

On Windows, the flag, or the `default` value if absent or ambiguous.

On all other operating systems, ``False``.

:note:

This only accesses the environment on Windows.

"""

return sys.platform == "win32" and _read_env_flag(name, default)

#: We need an easy way to see if Appveyor TCs start failing,

#: so the errors marked with this var are considered "acknowledged" ones, awaiting remedy,

#: till then, we wish to hide them.

HIDE_WINDOWS_KNOWN_ERRORS = _read_win_env_flag("HIDE_WINDOWS_KNOWN_ERRORS", True)

HIDE_WINDOWS_FREEZE_ERRORS = _read_win_env_flag("HIDE_WINDOWS_FREEZE_ERRORS", True)

# { Utility Methods

T = TypeVar("T")

def unbare_repo(func: Callable[..., T]) -> Callable[..., T]:

"""Methods with this decorator raise :exc:`~git.exc.InvalidGitRepositoryError` if

they encounter a bare repository."""

from .exc import InvalidGitRepositoryError

@wraps(func)

def wrapper(self: "Remote", *args: Any, **kwargs: Any) -> T:

if self.repo.bare:

raise InvalidGitRepositoryError("Method '%s' cannot operate on bare repositories" % func.__name__)

# END bare method

return func(self, *args, **kwargs)

# END wrapper

return wrapper

@contextlib.contextmanager

def cwd(new_dir: PathLike) -> Generator[PathLike, None, None]:

"""Context manager to temporarily change directory.

This is similar to :func:`contextlib.chdir` introduced in Python 3.11, but the

context manager object returned by a single call to this function is not reentrant.

"""

old_dir = os.getcwd()

os.chdir(new_dir)

try:

yield new_dir

finally:

os.chdir(old_dir)

@contextlib.contextmanager

def patch_env(name: str, value: str) -> Generator[None, None, None]:

"""Context manager to temporarily patch an environment variable."""

old_value = os.getenv(name)

os.environ[name] = value

try:

yield

finally:

if old_value is None:

del os.environ[name]

else:

os.environ[name] = old_value

def rmtree(path: PathLike) -> None:

"""Remove the given directory tree recursively.

:note:

We use :func:`shutil.rmtree` but adjust its behaviour to see whether files that

couldn't be deleted are read-only. Windows will not remove them in that case.

"""

def handler(function: Callable, path: PathLike, _excinfo: Any) -> None:

"""Callback for :func:`shutil.rmtree`.

This works as either a ``onexc`` or ``onerror`` style callback.

"""

# Is the error an access error?

os.chmod(path, stat.S_IWUSR)

try:

function(path)

except PermissionError as ex:

if HIDE_WINDOWS_KNOWN_ERRORS:

from unittest import SkipTest

raise SkipTest(f"FIXME: fails with: PermissionError\n {ex}") from ex

raise

if sys.platform != "win32":

shutil.rmtree(path)

elif sys.version_info >= (3, 12):

shutil.rmtree(path, onexc=handler)

else:

shutil.rmtree(path, onerror=handler)

def rmfile(path: PathLike) -> None:

"""Ensure file deleted also on *Windows* where read-only files need special

treatment."""

if osp.isfile(path):

if sys.platform == "win32":

os.chmod(path, 0o777)

os.remove(path)

def stream_copy(source: BinaryIO, destination: BinaryIO, chunk_size: int = 512 * 1024) -> int:

"""Copy all data from the `source` stream into the `destination` stream in chunks

of size `chunk_size`.

:return:

Number of bytes written

"""

br = 0

while True:

chunk = source.read(chunk_size)

destination.write(chunk)

br += len(chunk)

if len(chunk) < chunk_size:

break

# END reading output stream

return br

def join_path(a: PathLike, *p: PathLike) -> PathLike:

R"""Join path tokens together similar to osp.join, but always use ``/`` instead of

possibly ``\`` on Windows."""

path = os.fspath(a)

for b in p:

b = os.fspath(b)

if not b:

continue

if b.startswith("/"):

path += b[1:]

elif path == "" or path.endswith("/"):

path += b

else:

path += "/" + b

# END for each path token to add

return path

if sys.platform == "win32":

def to_native_path_windows(path: PathLike) -> str:

path = os.fspath(path)

return path.replace("/", "\\")

def to_native_path_linux(path: PathLike) -> str:

path = os.fspath(path)

return path.replace("\\", "/")

to_native_path = to_native_path_windows

else:

# No need for any work on Linux.

def to_native_path_linux(path: PathLike) -> str:

return os.fspath(path)

to_native_path = to_native_path_linux

def join_path_native(a: PathLike, *p: PathLike) -> PathLike:

R"""Like :func:`join_path`, but makes sure an OS native path is returned.

This is only needed to play it safe on Windows and to ensure nice paths that only

use ``\``.

"""

return to_native_path(join_path(a, *p))

def assure_directory_exists(path: PathLike, is_file: bool = False) -> bool:

"""Make sure that the directory pointed to by path exists.

:param is_file:

If ``True``, `path` is assumed to be a file and handled correctly.

Otherwise it must be a directory.

:return:

``True`` if the directory was created, ``False`` if it already existed.

"""

if is_file:

path = osp.dirname(path)

# END handle file

if not osp.isdir(path):

os.makedirs(path, exist_ok=True)

return True

return False

def _get_exe_extensions() -> Sequence[str]:

PATHEXT = os.environ.get("PATHEXT", None)

if PATHEXT:

return tuple(p.upper() for p in PATHEXT.split(os.pathsep))

elif sys.platform == "win32":

return (".BAT", ".COM", ".EXE")

else:

return ()

def py_where(program: str, path: Optional[PathLike] = None) -> List[str]:

"""Perform a path search to assist :func:`is_cygwin_git`.

This is not robust for general use. It is an implementation detail of

:func:`is_cygwin_git`. When a search following all shell rules is needed,

:func:`shutil.which` can be used instead.

:note:

Neither this function nor :func:`shutil.which` will predict the effect of an

executable search on a native Windows system due to a :class:`subprocess.Popen`

call without ``shell=True``, because shell and non-shell executable search on

Windows differ considerably.

"""

# From: http://stackoverflow.com/a/377028/548792

winprog_exts = _get_exe_extensions()

def is_exec(fpath: str) -> bool:

return (

osp.isfile(fpath)

and os.access(fpath, os.X_OK)

and (

sys.platform != "win32" or not winprog_exts or any(fpath.upper().endswith(ext) for ext in winprog_exts)

)

)

progs = []

if not path:

path = os.environ["PATH"]

for folder in os.fspath(path).split(os.pathsep):

folder = folder.strip('"')

if folder:

exe_path = osp.join(folder, program)

for f in [exe_path] + ["%s%s" % (exe_path, e) for e in winprog_exts]:

if is_exec(f):

progs.append(f)

return progs

def _cygexpath(drive: Optional[str], path: str) -> str:

if osp.isabs(path) and not drive:

# Invoked from `cygpath()` directly with `D:Apps\123`?

# It's an error, leave it alone just slashes)

p = path # convert to str if AnyPath given

else:

p = path and osp.normpath(osp.expandvars(osp.expanduser(path)))

if osp.isabs(p):

if drive:

# Confusing, maybe a remote system should expand vars.

p = path

else:

p = cygpath(p)

elif drive:

p = "/proc/cygdrive/%s/%s" % (drive.lower(), p)

p_str = os.fspath(p) # ensure it is a str and not AnyPath

return p_str.replace("\\", "/")

_cygpath_parsers: Tuple[Tuple[Pattern[str], Callable, bool], ...] = (

# See: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx

# and: https://www.cygwin.com/cygwin-ug-net/using.html#unc-paths

(

re.compile(r"\\\\\?\\UNC\\([^\\]+)\\([^\\]+)(?:\\(.*))?"),

(lambda server, share, rest_path: "//%s/%s/%s" % (server, share, rest_path.replace("\\", "/"))),

False,

),

(re.compile(r"\\\\\?\\(\w):[/\\](.*)"), (_cygexpath), False),

(re.compile(r"(\w):[/\\](.*)"), (_cygexpath), False),

(re.compile(r"file:(.*)", re.I), (lambda rest_path: rest_path), True),

(re.compile(r"(\w{2,}:.*)"), (lambda url: url), False), # remote URL, do nothing

)

def cygpath(path: str) -> str:

"""Use :meth:`git.cmd.Git.polish_url` instead, that works on any environment."""

path = os.fspath(path) # Ensure is str and not AnyPath.

# Fix to use Paths when 3.5 dropped. Or to be just str if only for URLs?

if not path.startswith(("/cygdrive", "//", "/proc/cygdrive")):

for regex, parser, recurse in _cygpath_parsers:

match = regex.match(path)

if match:

path = parser(*match.groups())

if recurse:

path = cygpath(path)

break

else:

path = _cygexpath(None, path)

return path

_decygpath_regex = re.compile(r"(?:/proc)?/cygdrive/(\w)(/.*)?")

def decygpath(path: PathLike) -> str:

path = os.fspath(path)

m = _decygpath_regex.match(path)

if m:

drive, rest_path = m.groups()

path = "%s:%s" % (drive.upper(), rest_path or "")

return path.replace("/", "\\")

#: Store boolean flags denoting if a specific Git executable

#: is from a Cygwin installation (since `cache_lru()` unsupported on PY2).

_is_cygwin_cache: Dict[str, Optional[bool]] = {}

def _is_cygwin_git(git_executable: str) -> bool:

is_cygwin = _is_cygwin_cache.get(git_executable) # type: Optional[bool]

if is_cygwin is None:

is_cygwin = False

try:

git_dir = osp.dirname(git_executable)

if not git_dir:

res = py_where(git_executable)

git_dir = osp.dirname(res[0]) if res else ""

# Just a name given, not a real path.

uname_cmd = osp.join(git_dir, "uname")

if not (Path(uname_cmd).is_file() and os.access(uname_cmd, os.X_OK)):

_logger.debug(f"Failed checking if running in CYGWIN: {uname_cmd} is not an executable")

_is_cygwin_cache[git_executable] = is_cygwin

return is_cygwin

process = subprocess.Popen([uname_cmd], stdout=subprocess.PIPE, universal_newlines=True)

uname_out, _ = process.communicate()

# retcode = process.poll()

is_cygwin = "CYGWIN" in uname_out

except Exception as ex:

_logger.debug("Failed checking if running in CYGWIN due to: %r", ex)

_is_cygwin_cache[git_executable] = is_cygwin

return is_cygwin

@overload

def is_cygwin_git(git_executable: None) -> Literal[False]: ...

@overload

def is_cygwin_git(git_executable: PathLike) -> bool: ...

def is_cygwin_git(git_executable: Union[None, PathLike]) -> bool:

# TODO: when py3.7 support is dropped, use the new interpolation f"{variable=}"

_logger.debug(f"sys.platform={sys.platform!r}, git_executable={git_executable!r}")

if sys.platform != "cygwin":

return False

elif git_executable is None:

return False

else:

return _is_cygwin_git(str(git_executable))

def get_user_id() -> str:

""":return: String identifying the currently active system user as ``name@node``"""

return "%s@%s" % (getpass.getuser(), platform.node())

def finalize_process(proc: Union[subprocess.Popen, "Git.AutoInterrupt"], **kwargs: Any) -> None:

"""Wait for the process (clone, fetch, pull or push) and handle its errors

accordingly."""

# TODO: No close proc-streams??

proc.wait(**kwargs)

@overload

def expand_path(p: None, expand_vars: bool = ...) -> None: ...

@overload

def expand_path(p: PathLike, expand_vars: bool = ...) -> str:

# TODO: Support for Python 3.5 has been dropped, so these overloads can be improved.

...

def expand_path(p: Union[None, PathLike], expand_vars: bool = True) -> Optional[PathLike]:

if isinstance(p, Path):

return p.resolve()

try:

p = osp.expanduser(p) # type: ignore[arg-type]

if expand_vars:

p = osp.expandvars(p)

return osp.normpath(osp.abspath(p))

except Exception:

return None

def remove_password_if_present(cmdline: Sequence[str]) -> List[str]:

"""Parse any command line argument and if one of the elements is an URL with a

username and/or password, replace them by stars (in-place).

If nothing is found, this just returns the command line as-is.

This should be used for every log line that print a command line, as well as

exception messages.

"""

new_cmdline = []

for index, to_parse in enumerate(cmdline):

new_cmdline.append(to_parse)

try:

url = urlsplit(to_parse)

# Remove password from the URL if present.

if url.password is None and url.username is None:

continue

if url.password is not None:

url = url._replace(netloc=url.netloc.replace(url.password, "*****"))

if url.username is not None:

url = url._replace(netloc=url.netloc.replace(url.username, "*****"))

new_cmdline[index] = urlunsplit(url)

except ValueError:

# This is not a valid URL.

continue

return new_cmdline

# } END utilities

# { Classes

class RemoteProgress:

"""Handler providing an interface to parse progress information emitted by

:manpage:`git-push(1)` and :manpage:`git-fetch(1)` and to dispatch callbacks

allowing subclasses to react to the progress."""

_num_op_codes: int = 9

(

BEGIN,

END,

COUNTING,

COMPRESSING,

WRITING,

RECEIVING,

RESOLVING,

FINDING_SOURCES,

CHECKING_OUT,

) = [1 << x for x in range(_num_op_codes)]

STAGE_MASK = BEGIN | END

OP_MASK = ~STAGE_MASK

DONE_TOKEN = "done."

TOKEN_SEPARATOR = ", "

__slots__ = (

"_cur_line",

"_seen_ops",

"error_lines", # Lines that started with 'error:' or 'fatal:'.

"other_lines", # Lines not denoting progress (i.e.g. push-infos).

)

re_op_absolute = re.compile(r"(remote: )?([\w\s]+):\s+()(\d+)()(.*)")

re_op_relative = re.compile(r"(remote: )?([\w\s]+):\s+(\d+)% \((\d+)/(\d+)\)(.*)")

def __init__(self) -> None:

self._seen_ops: List[int] = []

self._cur_line: Optional[str] = None

self.error_lines: List[str] = []

self.other_lines: List[str] = []

def _parse_progress_line(self, line: AnyStr) -> None:

"""Parse progress information from the given line as retrieved by

:manpage:`git-push(1)` or :manpage:`git-fetch(1)`.

- Lines that do not contain progress info are stored in :attr:`other_lines`.

- Lines that seem to contain an error (i.e. start with ``error:`` or ``fatal:``)

are stored in :attr:`error_lines`.

"""

# handle

# Counting objects: 4, done.

# Compressing objects: 50% (1/2)

# Compressing objects: 100% (2/2)

# Compressing objects: 100% (2/2), done.

if isinstance(line, bytes): # mypy argues about ternary assignment.

line_str = line.decode("utf-8")

else:

line_str = line

self._cur_line = line_str

if self._cur_line.startswith(("error:", "fatal:")):

self.error_lines.append(self._cur_line)

return

cur_count, max_count = None, None

match = self.re_op_relative.match(line_str)

if match is None:

match = self.re_op_absolute.match(line_str)

if not match:

self.line_dropped(line_str)

self.other_lines.append(line_str)

return

# END could not get match

op_code = 0

_remote, op_name, _percent, cur_count, max_count, message = match.groups()

# Get operation ID.

if op_name == "Counting objects":

op_code |= self.COUNTING

elif op_name == "Compressing objects":

op_code |= self.COMPRESSING

elif op_name == "Writing objects":

op_code |= self.WRITING

elif op_name == "Receiving objects":

op_code |= self.RECEIVING

elif op_name == "Resolving deltas":

op_code |= self.RESOLVING

elif op_name == "Finding sources":

op_code |= self.FINDING_SOURCES

elif op_name == "Checking out files":

op_code |= self.CHECKING_OUT

else:

# Note: On Windows it can happen that partial lines are sent.

# Hence we get something like "CompreReceiving objects", which is

# a blend of "Compressing objects" and "Receiving objects".

# This can't really be prevented, so we drop the line verbosely

# to make sure we get informed in case the process spits out new

# commands at some point.

self.line_dropped(line_str)

# Note: Don't add this line to the other lines, as we have to silently

# drop it.

return

# END handle op code

# Figure out stage.

if op_code not in self._seen_ops:

self._seen_ops.append(op_code)

op_code |= self.BEGIN

# END begin opcode

if message is None:

message = ""

# END message handling

message = message.strip()

if message.endswith(self.DONE_TOKEN):

op_code |= self.END

message = message[: -len(self.DONE_TOKEN)]

# END end message handling

message = message.strip(self.TOKEN_SEPARATOR)

self.update(

op_code,

cur_count and float(cur_count),

max_count and float(max_count),

message,

)

def new_message_handler(self) -> Callable[[str], None]:

"""

:return:

A progress handler suitable for :func:`~git.cmd.handle_process_output`,

passing lines on to this progress handler in a suitable format.

"""

def handler(line: AnyStr) -> None:

return self._parse_progress_line(line.rstrip())

# END handler

return handler

def line_dropped(self, line: str) -> None:

"""Called whenever a line could not be understood and was therefore dropped."""

pass

def update(

self,

op_code: int,

cur_count: Union[str, float],

max_count: Union[str, float, None] = None,

message: str = "",

) -> None:

"""Called whenever the progress changes.

:param op_code:

Integer allowing to be compared against Operation IDs and stage IDs.

Stage IDs are :const:`BEGIN` and :const:`END`. :const:`BEGIN` will only be

set once for each Operation ID as well as :const:`END`. It may be that

:const:`BEGIN` and :const:`END` are set at once in case only one progress

message was emitted due to the speed of the operation. Between

:const:`BEGIN` and :const:`END`, none of these flags will be set.

Operation IDs are all held within the :const:`OP_MASK`. Only one Operation

ID will be active per call.

:param cur_count:

Current absolute count of items.

:param max_count:

The maximum count of items we expect. It may be ``None`` in case there is no

maximum number of items or if it is (yet) unknown.

:param message:

In case of the :const:`WRITING` operation, it contains the amount of bytes

transferred. It may possibly be used for other purposes as well.

:note:

You may read the contents of the current line in

:attr:`self._cur_line <_cur_line>`.

"""

pass

class CallableRemoteProgress(RemoteProgress):

"""A :class:`RemoteProgress` implementation forwarding updates to any callable.

:note:

Like direct instances of :class:`RemoteProgress`, instances of this

:class:`CallableRemoteProgress` class are not themselves directly callable.

Rather, instances of this class wrap a callable and forward to it. This should

therefore not be confused with :class:`git.types.CallableProgress`.

"""

__slots__ = ("_callable",)

def __init__(self, fn: Callable) -> None:

self._callable = fn

super().__init__()

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

self._callable(*args, **kwargs)

class Actor:

"""Actors hold information about a person acting on the repository. They can be

committers and authors or anything with a name and an email as mentioned in the git

log entries."""

# PRECOMPILED REGEX

name_only_regex = re.compile(r"<(.*)>")

name_email_regex = re.compile(r"(.*) <(.*?)>")

# ENVIRONMENT VARIABLES

# These are read when creating new commits.

env_author_name = "GIT_AUTHOR_NAME"

env_author_email = "GIT_AUTHOR_EMAIL"

env_committer_name = "GIT_COMMITTER_NAME"

env_committer_email = "GIT_COMMITTER_EMAIL"

# CONFIGURATION KEYS

conf_name = "name"

conf_email = "email"

__slots__ = ("name", "email")

def __init__(self, name: Optional[str], email: Optional[str]) -> None:

self.name = name

self.email = email

def __eq__(self, other: Any) -> bool:

return self.name == other.name and self.email == other.email

def __ne__(self, other: Any) -> bool:

return not (self == other)

def __hash__(self) -> int:

return hash((self.name, self.email))

def __str__(self) -> str:

return self.name if self.name else ""

def __repr__(self) -> str:

return '<git.Actor "%s <%s>">' % (self.name, self.email)

@classmethod

def _from_string(cls, string: str) -> "Actor":

"""Create an :class:`Actor` from a string.

:param string:

The string, which is expected to be in regular git format::

John Doe <jdoe@example.com>

:return:

:class:`Actor`

"""

m = cls.name_email_regex.search(string)

if m:

name, email = m.groups()

return Actor(name, email)

else:

m = cls.name_only_regex.search(string)

if m:

return Actor(m.group(1), None)

# Assume the best and use the whole string as name.

return Actor(string, None)

# END special case name

# END handle name/email matching

@classmethod

def _main_actor(

cls,

env_name: str,

env_email: str,

config_reader: Union[None, "GitConfigParser", "SectionConstraint"] = None,

) -> "Actor":

actor = Actor("", "")

user_id = None # We use this to avoid multiple calls to getpass.getuser().

def default_email() -> str:

nonlocal user_id

if not user_id:

user_id = get_user_id()

return user_id

def default_name() -> str:

return default_email().split("@")[0]

for attr, evar, cvar, default in (

("name", env_name, cls.conf_name, default_name),

("email", env_email, cls.conf_email, default_email),

):

try:

val = os.environ[evar]

setattr(actor, attr, val)

except KeyError:

if config_reader is not None:

try:

val = config_reader.get("user", cvar)

except Exception:

val = default()

setattr(actor, attr, val)

# END config-reader handling

if not getattr(actor, attr):

setattr(actor, attr, default())

# END handle name

# END for each item to retrieve

return actor

@classmethod

def committer(cls, config_reader: Union[None, "GitConfigParser", "SectionConstraint"] = None) -> "Actor":

"""

:return:

:class:`Actor` instance corresponding to the configured committer. It

behaves similar to the git implementation, such that the environment will

override configuration values of `config_reader`. If no value is set at all,

it will be generated.

:param config_reader:

ConfigReader to use to retrieve the values from in case they are not set in

the environment.

"""

return cls._main_actor(cls.env_committer_name, cls.env_committer_email, config_reader)

@classmethod

def author(cls, config_reader: Union[None, "GitConfigParser", "SectionConstraint"] = None) -> "Actor":

"""Same as :meth:`committer`, but defines the main author. It may be specified

in the environment, but defaults to the committer."""

return cls._main_actor(cls.env_author_name, cls.env_author_email, config_reader)

class Stats:

"""Represents stat information as presented by git at the end of a merge. It is

created from the output of a diff operation.

Example::

c = Commit( sha1 )

s = c.stats

s.total # full-stat-dict

s.files # dict( filepath : stat-dict )

``stat-dict``

A dictionary with the following keys and values::

deletions = number of deleted lines as int

insertions = number of inserted lines as int

lines = total number of lines changed as int, or deletions + insertions

change_type = type of change as str, A|C|D|M|R|T|U|X|B

``full-stat-dict``

In addition to the items in the stat-dict, it features additional information::

files = number of changed files as int

"""

__slots__ = ("total", "files")

def __init__(self, total: Total_TD, files: Dict[PathLike, Files_TD]) -> None:

self.total = total

self.files = files

@classmethod

def _list_from_string(cls, repo: "Repo", text: str) -> "Stats":

"""Create a :class:`Stats` object from output retrieved by

:manpage:`git-diff(1)`.

:return:

:class:`git.Stats`

"""

hsh: HSH_TD = {

"total": {"insertions": 0, "deletions": 0, "lines": 0, "files": 0},

"files": {},

}

for line in text.splitlines():

(change_type, raw_insertions, raw_deletions, filename) = line.split("\t")

insertions = raw_insertions != "-" and int(raw_insertions) or 0

deletions = raw_deletions != "-" and int(raw_deletions) or 0

hsh["total"]["insertions"] += insertions

hsh["total"]["deletions"] += deletions

hsh["total"]["lines"] += insertions + deletions

hsh["total"]["files"] += 1

files_dict: Files_TD = {

"insertions": insertions,

"deletions": deletions,

"lines": insertions + deletions,

"change_type": change_type,

}

hsh["files"][filename.strip()] = files_dict

return Stats(hsh["total"], hsh["files"])

class IndexFileSHA1Writer:

"""Wrapper around a file-like object that remembers the SHA1 of the data written to

it. It will write a sha when the stream is closed or if asked for explicitly using

:meth:`write_sha`.

Only useful to the index file.

:note:

Based on the dulwich project.

"""

__slots__ = ("f", "sha1")

def __init__(self, f: IO) -> None:

self.f = f

self.sha1 = make_sha(b"")

def write(self, data: AnyStr) -> int:

self.sha1.update(data)

return self.f.write(data)

def write_sha(self) -> bytes:

sha = self.sha1.digest()

self.f.write(sha)

return sha

def close(self) -> bytes:

sha = self.write_sha()

self.f.close()

return sha

def tell(self) -> int:

return self.f.tell()