upload
This commit is contained in:
HamsterMimi
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# util.py
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# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
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#
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# This module is part of GitPython and is released under
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# the BSD License: http://www.opensource.org/licenses/bsd-license.php
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"""Module for general utility functions"""
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# flake8: noqa F401
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from abc import ABC, abstractmethod
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import warnings
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from git.util import IterableList, IterableObj, Actor
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import re
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from collections import deque
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from string import digits
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import time
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import calendar
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from datetime import datetime, timedelta, tzinfo
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# typing ------------------------------------------------------------
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from typing import (
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Any,
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Callable,
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Deque,
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Iterator,
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Generic,
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NamedTuple,
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overload,
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Sequence, # NOQA: F401
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TYPE_CHECKING,
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Tuple,
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Type,
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TypeVar,
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Union,
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cast,
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)
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from git.types import Has_id_attribute, Literal, _T # NOQA: F401
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if TYPE_CHECKING:
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from io import BytesIO, StringIO
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from .commit import Commit
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from .blob import Blob
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from .tag import TagObject
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from .tree import Tree, TraversedTreeTup
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from subprocess import Popen
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from .submodule.base import Submodule
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from git.types import Protocol, runtime_checkable
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else:
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# Protocol = Generic[_T] # Needed for typing bug #572?
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Protocol = ABC
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def runtime_checkable(f):
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return f
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class TraverseNT(NamedTuple):
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depth: int
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item: Union["Traversable", "Blob"]
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src: Union["Traversable", None]
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T_TIobj = TypeVar("T_TIobj", bound="TraversableIterableObj") # for TraversableIterableObj.traverse()
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TraversedTup = Union[
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Tuple[Union["Traversable", None], "Traversable"], # for commit, submodule
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"TraversedTreeTup",
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] # for tree.traverse()
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# --------------------------------------------------------------------
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__all__ = (
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"get_object_type_by_name",
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"parse_date",
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"parse_actor_and_date",
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"ProcessStreamAdapter",
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"Traversable",
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"altz_to_utctz_str",
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"utctz_to_altz",
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"verify_utctz",
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"Actor",
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"tzoffset",
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"utc",
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)
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ZERO = timedelta(0)
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# { Functions
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def mode_str_to_int(modestr: Union[bytes, str]) -> int:
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"""
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:param modestr: string like 755 or 644 or 100644 - only the last 6 chars will be used
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:return:
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String identifying a mode compatible to the mode methods ids of the
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stat module regarding the rwx permissions for user, group and other,
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special flags and file system flags, i.e. whether it is a symlink
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for example."""
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mode = 0
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for iteration, char in enumerate(reversed(modestr[-6:])):
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char = cast(Union[str, int], char)
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mode += int(char) << iteration * 3
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# END for each char
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return mode
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def get_object_type_by_name(
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object_type_name: bytes,
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) -> Union[Type["Commit"], Type["TagObject"], Type["Tree"], Type["Blob"]]:
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"""
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:return: type suitable to handle the given object type name.
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Use the type to create new instances.
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:param object_type_name: Member of TYPES
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:raise ValueError: In case object_type_name is unknown"""
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if object_type_name == b"commit":
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from . import commit
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return commit.Commit
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elif object_type_name == b"tag":
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from . import tag
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return tag.TagObject
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elif object_type_name == b"blob":
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from . import blob
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return blob.Blob
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elif object_type_name == b"tree":
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from . import tree
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return tree.Tree
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else:
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raise ValueError("Cannot handle unknown object type: %s" % object_type_name.decode())
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def utctz_to_altz(utctz: str) -> int:
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"""Convert a git timezone offset into a timezone offset west of
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UTC in seconds (compatible with time.altzone).
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:param utctz: git utc timezone string, i.e. +0200
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"""
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int_utctz = int(utctz)
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seconds = ((abs(int_utctz) // 100) * 3600 + (abs(int_utctz) % 100) * 60)
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return seconds if int_utctz < 0 else -seconds
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def altz_to_utctz_str(altz: int) -> str:
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"""Convert a timezone offset west of UTC in seconds into a git timezone offset string
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:param altz: timezone offset in seconds west of UTC
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"""
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hours = abs(altz) // 3600
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minutes = (abs(altz) % 3600) // 60
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sign = "-" if altz >= 60 else "+"
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return "{}{:02}{:02}".format(sign, hours, minutes)
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def verify_utctz(offset: str) -> str:
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""":raise ValueError: if offset is incorrect
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:return: offset"""
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fmt_exc = ValueError("Invalid timezone offset format: %s" % offset)
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if len(offset) != 5:
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raise fmt_exc
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if offset[0] not in "+-":
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raise fmt_exc
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if offset[1] not in digits or offset[2] not in digits or offset[3] not in digits or offset[4] not in digits:
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raise fmt_exc
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# END for each char
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return offset
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class tzoffset(tzinfo):
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def __init__(self, secs_west_of_utc: float, name: Union[None, str] = None) -> None:
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self._offset = timedelta(seconds=-secs_west_of_utc)
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self._name = name or "fixed"
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def __reduce__(self) -> Tuple[Type["tzoffset"], Tuple[float, str]]:
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return tzoffset, (-self._offset.total_seconds(), self._name)
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def utcoffset(self, dt: Union[datetime, None]) -> timedelta:
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return self._offset
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def tzname(self, dt: Union[datetime, None]) -> str:
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return self._name
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def dst(self, dt: Union[datetime, None]) -> timedelta:
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return ZERO
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utc = tzoffset(0, "UTC")
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def from_timestamp(timestamp: float, tz_offset: float) -> datetime:
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"""Converts a timestamp + tz_offset into an aware datetime instance."""
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utc_dt = datetime.fromtimestamp(timestamp, utc)
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try:
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local_dt = utc_dt.astimezone(tzoffset(tz_offset))
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return local_dt
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except ValueError:
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return utc_dt
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def parse_date(string_date: Union[str, datetime]) -> Tuple[int, int]:
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"""
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Parse the given date as one of the following
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* aware datetime instance
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* Git internal format: timestamp offset
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* RFC 2822: Thu, 07 Apr 2005 22:13:13 +0200.
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* ISO 8601 2005-04-07T22:13:13
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The T can be a space as well
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:return: Tuple(int(timestamp_UTC), int(offset)), both in seconds since epoch
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:raise ValueError: If the format could not be understood
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:note: Date can also be YYYY.MM.DD, MM/DD/YYYY and DD.MM.YYYY.
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"""
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if isinstance(string_date, datetime):
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if string_date.tzinfo:
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utcoffset = cast(timedelta, string_date.utcoffset()) # typeguard, if tzinfoand is not None
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offset = -int(utcoffset.total_seconds())
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return int(string_date.astimezone(utc).timestamp()), offset
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else:
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raise ValueError(f"string_date datetime object without tzinfo, {string_date}")
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# git time
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try:
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if string_date.count(" ") == 1 and string_date.rfind(":") == -1:
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timestamp, offset_str = string_date.split()
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if timestamp.startswith("@"):
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timestamp = timestamp[1:]
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timestamp_int = int(timestamp)
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return timestamp_int, utctz_to_altz(verify_utctz(offset_str))
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else:
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offset_str = "+0000" # local time by default
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if string_date[-5] in "-+":
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offset_str = verify_utctz(string_date[-5:])
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string_date = string_date[:-6] # skip space as well
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# END split timezone info
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offset = utctz_to_altz(offset_str)
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# now figure out the date and time portion - split time
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date_formats = []
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splitter = -1
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if "," in string_date:
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date_formats.append("%a, %d %b %Y")
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splitter = string_date.rfind(" ")
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else:
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# iso plus additional
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date_formats.append("%Y-%m-%d")
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date_formats.append("%Y.%m.%d")
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date_formats.append("%m/%d/%Y")
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date_formats.append("%d.%m.%Y")
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splitter = string_date.rfind("T")
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if splitter == -1:
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splitter = string_date.rfind(" ")
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# END handle 'T' and ' '
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# END handle rfc or iso
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assert splitter > -1
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# split date and time
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time_part = string_date[splitter + 1 :] # skip space
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date_part = string_date[:splitter]
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# parse time
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tstruct = time.strptime(time_part, "%H:%M:%S")
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for fmt in date_formats:
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try:
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dtstruct = time.strptime(date_part, fmt)
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utctime = calendar.timegm(
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(
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dtstruct.tm_year,
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dtstruct.tm_mon,
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dtstruct.tm_mday,
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tstruct.tm_hour,
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tstruct.tm_min,
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tstruct.tm_sec,
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dtstruct.tm_wday,
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dtstruct.tm_yday,
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tstruct.tm_isdst,
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)
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)
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return int(utctime), offset
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except ValueError:
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continue
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# END exception handling
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# END for each fmt
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# still here ? fail
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raise ValueError("no format matched")
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# END handle format
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except Exception as e:
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raise ValueError(f"Unsupported date format or type: {string_date}, type={type(string_date)}") from e
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# END handle exceptions
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# precompiled regex
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_re_actor_epoch = re.compile(r"^.+? (.*) (\d+) ([+-]\d+).*$")
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_re_only_actor = re.compile(r"^.+? (.*)$")
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def parse_actor_and_date(line: str) -> Tuple[Actor, int, int]:
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"""Parse out the actor (author or committer) info from a line like::
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author Tom Preston-Werner <tom@mojombo.com> 1191999972 -0700
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:return: [Actor, int_seconds_since_epoch, int_timezone_offset]"""
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actor, epoch, offset = "", "0", "0"
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m = _re_actor_epoch.search(line)
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if m:
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actor, epoch, offset = m.groups()
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else:
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m = _re_only_actor.search(line)
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actor = m.group(1) if m else line or ""
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return (Actor._from_string(actor), int(epoch), utctz_to_altz(offset))
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# } END functions
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# { Classes
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class ProcessStreamAdapter(object):
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"""Class wireing all calls to the contained Process instance.
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Use this type to hide the underlying process to provide access only to a specified
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stream. The process is usually wrapped into an AutoInterrupt class to kill
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it if the instance goes out of scope."""
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__slots__ = ("_proc", "_stream")
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def __init__(self, process: "Popen", stream_name: str) -> None:
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self._proc = process
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self._stream: StringIO = getattr(process, stream_name) # guessed type
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def __getattr__(self, attr: str) -> Any:
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return getattr(self._stream, attr)
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@runtime_checkable
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class Traversable(Protocol):
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"""Simple interface to perform depth-first or breadth-first traversals
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into one direction.
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Subclasses only need to implement one function.
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Instances of the Subclass must be hashable
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Defined subclasses = [Commit, Tree, SubModule]
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"""
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__slots__ = ()
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@classmethod
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@abstractmethod
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def _get_intermediate_items(cls, item: Any) -> Sequence["Traversable"]:
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"""
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Returns:
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Tuple of items connected to the given item.
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Must be implemented in subclass
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class Commit:: (cls, Commit) -> Tuple[Commit, ...]
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class Submodule:: (cls, Submodule) -> Iterablelist[Submodule]
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class Tree:: (cls, Tree) -> Tuple[Tree, ...]
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"""
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raise NotImplementedError("To be implemented in subclass")
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@abstractmethod
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def list_traverse(self, *args: Any, **kwargs: Any) -> Any:
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""" """
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warnings.warn(
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"list_traverse() method should only be called from subclasses."
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"Calling from Traversable abstract class will raise NotImplementedError in 3.1.20"
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"Builtin sublclasses are 'Submodule', 'Tree' and 'Commit",
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DeprecationWarning,
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stacklevel=2,
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)
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return self._list_traverse(*args, **kwargs)
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def _list_traverse(
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self, as_edge: bool = False, *args: Any, **kwargs: Any
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) -> IterableList[Union["Commit", "Submodule", "Tree", "Blob"]]:
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"""
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:return: IterableList with the results of the traversal as produced by
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traverse()
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Commit -> IterableList['Commit']
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Submodule -> IterableList['Submodule']
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Tree -> IterableList[Union['Submodule', 'Tree', 'Blob']]
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"""
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# Commit and Submodule have id.__attribute__ as IterableObj
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# Tree has id.__attribute__ inherited from IndexObject
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if isinstance(self, Has_id_attribute):
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id = self._id_attribute_
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else:
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id = "" # shouldn't reach here, unless Traversable subclass created with no _id_attribute_
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# could add _id_attribute_ to Traversable, or make all Traversable also Iterable?
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if not as_edge:
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out: IterableList[Union["Commit", "Submodule", "Tree", "Blob"]] = IterableList(id)
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out.extend(self.traverse(as_edge=as_edge, *args, **kwargs))
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return out
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# overloads in subclasses (mypy doesn't allow typing self: subclass)
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# Union[IterableList['Commit'], IterableList['Submodule'], IterableList[Union['Submodule', 'Tree', 'Blob']]]
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else:
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# Raise deprecationwarning, doesn't make sense to use this
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out_list: IterableList = IterableList(self.traverse(*args, **kwargs))
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return out_list
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@abstractmethod
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def traverse(self, *args: Any, **kwargs: Any) -> Any:
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""" """
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warnings.warn(
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"traverse() method should only be called from subclasses."
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||||
"Calling from Traversable abstract class will raise NotImplementedError in 3.1.20"
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||||
"Builtin sublclasses are 'Submodule', 'Tree' and 'Commit",
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DeprecationWarning,
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stacklevel=2,
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)
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||||
return self._traverse(*args, **kwargs)
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||||
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||||
def _traverse(
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self,
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predicate: Callable[[Union["Traversable", "Blob", TraversedTup], int], bool] = lambda i, d: True,
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prune: Callable[[Union["Traversable", "Blob", TraversedTup], int], bool] = lambda i, d: False,
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depth: int = -1,
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branch_first: bool = True,
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visit_once: bool = True,
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||||
ignore_self: int = 1,
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||||
as_edge: bool = False,
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||||
) -> Union[Iterator[Union["Traversable", "Blob"]], Iterator[TraversedTup]]:
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||||
""":return: iterator yielding of items found when traversing self
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||||
:param predicate: f(i,d) returns False if item i at depth d should not be included in the result
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||||
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||||
:param prune:
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f(i,d) return True if the search should stop at item i at depth d.
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Item i will not be returned.
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||||
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||||
:param depth:
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define at which level the iteration should not go deeper
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||||
if -1, there is no limit
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||||
if 0, you would effectively only get self, the root of the iteration
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||||
i.e. if 1, you would only get the first level of predecessors/successors
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||||
|
||||
:param branch_first:
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||||
if True, items will be returned branch first, otherwise depth first
|
||||
|
||||
:param visit_once:
|
||||
if True, items will only be returned once, although they might be encountered
|
||||
several times. Loops are prevented that way.
|
||||
|
||||
:param ignore_self:
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if True, self will be ignored and automatically pruned from
|
||||
the result. Otherwise it will be the first item to be returned.
|
||||
If as_edge is True, the source of the first edge is None
|
||||
|
||||
:param as_edge:
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||||
if True, return a pair of items, first being the source, second the
|
||||
destination, i.e. tuple(src, dest) with the edge spanning from
|
||||
source to destination"""
|
||||
|
||||
"""
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||||
Commit -> Iterator[Union[Commit, Tuple[Commit, Commit]]
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||||
Submodule -> Iterator[Submodule, Tuple[Submodule, Submodule]]
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||||
Tree -> Iterator[Union[Blob, Tree, Submodule,
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||||
Tuple[Union[Submodule, Tree], Union[Blob, Tree, Submodule]]]
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||||
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||||
ignore_self=True is_edge=True -> Iterator[item]
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||||
ignore_self=True is_edge=False --> Iterator[item]
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||||
ignore_self=False is_edge=True -> Iterator[item] | Iterator[Tuple[src, item]]
|
||||
ignore_self=False is_edge=False -> Iterator[Tuple[src, item]]"""
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||||
|
||||
visited = set()
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||||
stack: Deque[TraverseNT] = deque()
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||||
stack.append(TraverseNT(0, self, None)) # self is always depth level 0
|
||||
|
||||
def addToStack(
|
||||
stack: Deque[TraverseNT],
|
||||
src_item: "Traversable",
|
||||
branch_first: bool,
|
||||
depth: int,
|
||||
) -> None:
|
||||
lst = self._get_intermediate_items(item)
|
||||
if not lst: # empty list
|
||||
return None
|
||||
if branch_first:
|
||||
stack.extendleft(TraverseNT(depth, i, src_item) for i in lst)
|
||||
else:
|
||||
reviter = (TraverseNT(depth, lst[i], src_item) for i in range(len(lst) - 1, -1, -1))
|
||||
stack.extend(reviter)
|
||||
|
||||
# END addToStack local method
|
||||
|
||||
while stack:
|
||||
d, item, src = stack.pop() # depth of item, item, item_source
|
||||
|
||||
if visit_once and item in visited:
|
||||
continue
|
||||
|
||||
if visit_once:
|
||||
visited.add(item)
|
||||
|
||||
rval: Union[TraversedTup, "Traversable", "Blob"]
|
||||
if as_edge: # if as_edge return (src, item) unless rrc is None (e.g. for first item)
|
||||
rval = (src, item)
|
||||
else:
|
||||
rval = item
|
||||
|
||||
if prune(rval, d):
|
||||
continue
|
||||
|
||||
skipStartItem = ignore_self and (item is self)
|
||||
if not skipStartItem and predicate(rval, d):
|
||||
yield rval
|
||||
|
||||
# only continue to next level if this is appropriate !
|
||||
nd = d + 1
|
||||
if depth > -1 and nd > depth:
|
||||
continue
|
||||
|
||||
addToStack(stack, item, branch_first, nd)
|
||||
# END for each item on work stack
|
||||
|
||||
|
||||
@runtime_checkable
|
||||
class Serializable(Protocol):
|
||||
|
||||
"""Defines methods to serialize and deserialize objects from and into a data stream"""
|
||||
|
||||
__slots__ = ()
|
||||
|
||||
# @abstractmethod
|
||||
def _serialize(self, stream: "BytesIO") -> "Serializable":
|
||||
"""Serialize the data of this object into the given data stream
|
||||
:note: a serialized object would ``_deserialize`` into the same object
|
||||
:param stream: a file-like object
|
||||
:return: self"""
|
||||
raise NotImplementedError("To be implemented in subclass")
|
||||
|
||||
# @abstractmethod
|
||||
def _deserialize(self, stream: "BytesIO") -> "Serializable":
|
||||
"""Deserialize all information regarding this object from the stream
|
||||
:param stream: a file-like object
|
||||
:return: self"""
|
||||
raise NotImplementedError("To be implemented in subclass")
|
||||
|
||||
|
||||
class TraversableIterableObj(IterableObj, Traversable):
|
||||
__slots__ = ()
|
||||
|
||||
TIobj_tuple = Tuple[Union[T_TIobj, None], T_TIobj]
|
||||
|
||||
def list_traverse(self: T_TIobj, *args: Any, **kwargs: Any) -> IterableList[T_TIobj]:
|
||||
return super(TraversableIterableObj, self)._list_traverse(*args, **kwargs)
|
||||
|
||||
@overload # type: ignore
|
||||
def traverse(self: T_TIobj) -> Iterator[T_TIobj]:
|
||||
...
|
||||
|
||||
@overload
|
||||
def traverse(
|
||||
self: T_TIobj,
|
||||
predicate: Callable[[Union[T_TIobj, Tuple[Union[T_TIobj, None], T_TIobj]], int], bool],
|
||||
prune: Callable[[Union[T_TIobj, Tuple[Union[T_TIobj, None], T_TIobj]], int], bool],
|
||||
depth: int,
|
||||
branch_first: bool,
|
||||
visit_once: bool,
|
||||
ignore_self: Literal[True],
|
||||
as_edge: Literal[False],
|
||||
) -> Iterator[T_TIobj]:
|
||||
...
|
||||
|
||||
@overload
|
||||
def traverse(
|
||||
self: T_TIobj,
|
||||
predicate: Callable[[Union[T_TIobj, Tuple[Union[T_TIobj, None], T_TIobj]], int], bool],
|
||||
prune: Callable[[Union[T_TIobj, Tuple[Union[T_TIobj, None], T_TIobj]], int], bool],
|
||||
depth: int,
|
||||
branch_first: bool,
|
||||
visit_once: bool,
|
||||
ignore_self: Literal[False],
|
||||
as_edge: Literal[True],
|
||||
) -> Iterator[Tuple[Union[T_TIobj, None], T_TIobj]]:
|
||||
...
|
||||
|
||||
@overload
|
||||
def traverse(
|
||||
self: T_TIobj,
|
||||
predicate: Callable[[Union[T_TIobj, TIobj_tuple], int], bool],
|
||||
prune: Callable[[Union[T_TIobj, TIobj_tuple], int], bool],
|
||||
depth: int,
|
||||
branch_first: bool,
|
||||
visit_once: bool,
|
||||
ignore_self: Literal[True],
|
||||
as_edge: Literal[True],
|
||||
) -> Iterator[Tuple[T_TIobj, T_TIobj]]:
|
||||
...
|
||||
|
||||
def traverse(
|
||||
self: T_TIobj,
|
||||
predicate: Callable[[Union[T_TIobj, TIobj_tuple], int], bool] = lambda i, d: True,
|
||||
prune: Callable[[Union[T_TIobj, TIobj_tuple], int], bool] = lambda i, d: False,
|
||||
depth: int = -1,
|
||||
branch_first: bool = True,
|
||||
visit_once: bool = True,
|
||||
ignore_self: int = 1,
|
||||
as_edge: bool = False,
|
||||
) -> Union[Iterator[T_TIobj], Iterator[Tuple[T_TIobj, T_TIobj]], Iterator[TIobj_tuple]]:
|
||||
"""For documentation, see util.Traversable._traverse()"""
|
||||
|
||||
"""
|
||||
# To typecheck instead of using cast.
|
||||
import itertools
|
||||
from git.types import TypeGuard
|
||||
def is_commit_traversed(inp: Tuple) -> TypeGuard[Tuple[Iterator[Tuple['Commit', 'Commit']]]]:
|
||||
for x in inp[1]:
|
||||
if not isinstance(x, tuple) and len(x) != 2:
|
||||
if all(isinstance(inner, Commit) for inner in x):
|
||||
continue
|
||||
return True
|
||||
|
||||
ret = super(Commit, self).traverse(predicate, prune, depth, branch_first, visit_once, ignore_self, as_edge)
|
||||
ret_tup = itertools.tee(ret, 2)
|
||||
assert is_commit_traversed(ret_tup), f"{[type(x) for x in list(ret_tup[0])]}"
|
||||
return ret_tup[0]
|
||||
"""
|
||||
return cast(
|
||||
Union[Iterator[T_TIobj], Iterator[Tuple[Union[None, T_TIobj], T_TIobj]]],
|
||||
super(TraversableIterableObj, self)._traverse(
|
||||
predicate, prune, depth, branch_first, visit_once, ignore_self, as_edge # type: ignore
|
||||
),
|
||||
)
|
||||
Reference in New Issue
Block a user