1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
# base.py
# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php
from .util import get_object_type_by_name
from git.util import LazyMixin, join_path_native, stream_copy
from gitdb.util import (
bin_to_hex,
basename
)
import gitdb.typ as dbtyp
_assertion_msg_format = "Created object %r whose python type %r disagrees with the acutal git object type %r"
__all__ = ("Object", "IndexObject")
class Object(LazyMixin):
"""Implements an Object which may be Blobs, Trees, Commits and Tags"""
NULL_HEX_SHA = '0' * 40
NULL_BIN_SHA = b'\0' * 20
TYPES = (dbtyp.str_blob_type, dbtyp.str_tree_type, dbtyp.str_commit_type, dbtyp.str_tag_type)
__slots__ = ("repo", "binsha", "size")
type = None # to be set by subclass
def __init__(self, repo, binsha):
"""Initialize an object by identifying it by its binary sha.
All keyword arguments will be set on demand if None.
:param repo: repository this object is located in
:param binsha: 20 byte SHA1"""
super(Object, self).__init__()
self.repo = repo
self.binsha = binsha
assert len(binsha) == 20, "Require 20 byte binary sha, got %r, len = %i" % (binsha, len(binsha))
@classmethod
def new(cls, repo, id):
"""
:return: New Object instance of a type appropriate to the object type behind
id. The id of the newly created object will be a binsha even though
the input id may have been a Reference or Rev-Spec
:param id: reference, rev-spec, or hexsha
:note: This cannot be a __new__ method as it would always call __init__
with the input id which is not necessarily a binsha."""
return repo.rev_parse(str(id))
@classmethod
def new_from_sha(cls, repo, sha1):
"""
:return: new object instance of a type appropriate to represent the given
binary sha1
:param sha1: 20 byte binary sha1"""
if sha1 == cls.NULL_BIN_SHA:
# the NULL binsha is always the root commit
return get_object_type_by_name(b'commit')(repo, sha1)
# END handle special case
oinfo = repo.odb.info(sha1)
inst = get_object_type_by_name(oinfo.type)(repo, oinfo.binsha)
inst.size = oinfo.size
return inst
def _set_cache_(self, attr):
"""Retrieve object information"""
if attr == "size":
oinfo = self.repo.odb.info(self.binsha)
self.size = oinfo.size
# assert oinfo.type == self.type, _assertion_msg_format % (self.binsha, oinfo.type, self.type)
else:
super(Object, self)._set_cache_(attr)
def __eq__(self, other):
""":return: True if the objects have the same SHA1"""
if not hasattr(other, 'binsha'):
return False
return self.binsha == other.binsha
def __ne__(self, other):
""":return: True if the objects do not have the same SHA1 """
if not hasattr(other, 'binsha'):
return True
return self.binsha != other.binsha
def __hash__(self):
""":return: Hash of our id allowing objects to be used in dicts and sets"""
return hash(self.binsha)
def __str__(self):
""":return: string of our SHA1 as understood by all git commands"""
return self.hexsha
def __repr__(self):
""":return: string with pythonic representation of our object"""
return '<git.%s "%s">' % (self.__class__.__name__, self.hexsha)
@property
def hexsha(self):
""":return: 40 byte hex version of our 20 byte binary sha"""
# b2a_hex produces bytes
return bin_to_hex(self.binsha).decode('ascii')
@property
def data_stream(self):
""" :return: File Object compatible stream to the uncompressed raw data of the object
:note: returned streams must be read in order"""
return self.repo.odb.stream(self.binsha)
def stream_data(self, ostream):
"""Writes our data directly to the given output stream
:param ostream: File object compatible stream object.
:return: self"""
istream = self.repo.odb.stream(self.binsha)
stream_copy(istream, ostream)
return self
class IndexObject(Object):
"""Base for all objects that can be part of the index file , namely Tree, Blob and
SubModule objects"""
__slots__ = ("path", "mode")
# for compatability with iterable lists
_id_attribute_ = 'path'
def __init__(self, repo, binsha, mode=None, path=None):
"""Initialize a newly instanced IndexObject
:param repo: is the Repo we are located in
:param binsha: 20 byte sha1
:param mode:
is the stat compatible file mode as int, use the stat module
to evaluate the infomration
:param path:
is the path to the file in the file system, relative to the git repository root, i.e.
file.ext or folder/other.ext
:note:
Path may not be set of the index object has been created directly as it cannot
be retrieved without knowing the parent tree."""
super(IndexObject, self).__init__(repo, binsha)
if mode is not None:
self.mode = mode
if path is not None:
self.path = path
def __hash__(self):
"""
:return:
Hash of our path as index items are uniquely identifyable by path, not
by their data !"""
return hash(self.path)
def _set_cache_(self, attr):
if attr in IndexObject.__slots__:
# they cannot be retrieved lateron ( not without searching for them )
raise AttributeError(
"Attribute '%s' unset: path and mode attributes must have been set during %s object creation"
% (attr, type(self).__name__))
else:
super(IndexObject, self)._set_cache_(attr)
# END hanlde slot attribute
@property
def name(self):
""":return: Name portion of the path, effectively being the basename"""
return basename(self.path)
@property
def abspath(self):
"""
:return:
Absolute path to this index object in the file system ( as opposed to the
.path field which is a path relative to the git repository ).
The returned path will be native to the system and contains '\' on windows. """
return join_path_native(self.repo.working_tree_dir, self.path)
|
