GitPython/git/objects/base.py at master · githubdelegate/GitPython · GitHub

Repository navigation

History

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

# 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)

GitPython/git/objects/base.py at master · githubdelegate/GitPython · GitHub

Repository navigation

Expand file tree

Breadcrumbs

base.py

Latest commit

History

Breadcrumbs

base.py

File metadata and controls