diff options
Diffstat (limited to 'git/objects/base.py')
| -rw-r--r-- | git/objects/base.py | 340 |
1 files changed, 170 insertions, 170 deletions
diff --git a/git/objects/base.py b/git/objects/base.py index 61b3e674..cb6f9761 100644 --- a/git/objects/base.py +++ b/git/objects/base.py @@ -6,187 +6,187 @@ from util import get_object_type_by_name from git.util import ( - hex_to_bin, - bin_to_hex, - dirname, - basename, - LazyMixin, - join_path_native, - stream_copy - ) + hex_to_bin, + bin_to_hex, + dirname, + basename, + LazyMixin, + join_path_native, + stream_copy + ) from git.db.interface import RepositoryPathsMixin from git.exc import UnsupportedOperation from git.typ import ObjectType - + _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 = '\0'*20 - - TYPES = (ObjectType.blob, ObjectType.tree, ObjectType.commit, ObjectType.tag) - __slots__ = ("odb", "binsha", "size" ) - - type = None # to be set by subclass - type_id = None # to be set by subclass - - def __init__(self, odb, binsha): - """Initialize an object by identifying it by its binary sha. - All keyword arguments will be set on demand if None. - - :param odb: repository this object is located in - - :param binsha: 20 byte SHA1""" - super(Object,self).__init__() - self.odb = odb - self.binsha = binsha - assert len(binsha) == 20, "Require 20 byte binary sha, got %r, len = %i" % (binsha, len(binsha)) + """Implements an Object which may be Blobs, Trees, Commits and Tags""" + NULL_HEX_SHA = '0'*40 + NULL_BIN_SHA = '\0'*20 + + TYPES = (ObjectType.blob, ObjectType.tree, ObjectType.commit, ObjectType.tag) + __slots__ = ("odb", "binsha", "size" ) + + type = None # to be set by subclass + type_id = None # to be set by subclass + + def __init__(self, odb, binsha): + """Initialize an object by identifying it by its binary sha. + All keyword arguments will be set on demand if None. + + :param odb: repository this object is located in + + :param binsha: 20 byte SHA1""" + super(Object,self).__init__() + self.odb = odb + self.binsha = binsha + assert len(binsha) == 20, "Require 20 byte binary sha, got %r, len = %i" % (binsha, len(binsha)) - @classmethod - def new(cls, odb, 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 odb.rev_parse(str(id)) - - @classmethod - def new_from_sha(cls, odb, 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('commit')(odb, sha1) - #END handle special case - oinfo = odb.info(sha1) - inst = get_object_type_by_name(oinfo.type)(odb, oinfo.binsha) - inst.size = oinfo.size - return inst - - def _set_cache_(self, attr): - """Retrieve object information""" - if attr == "size": - oinfo = self.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 bin_to_hex(self.binsha) - - def __repr__(self): - """:return: string with pythonic representation of our object""" - return '<git.%s "%s">' % (self.__class__.__name__, self.hexsha) + @classmethod + def new(cls, odb, 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 odb.rev_parse(str(id)) + + @classmethod + def new_from_sha(cls, odb, 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('commit')(odb, sha1) + #END handle special case + oinfo = odb.info(sha1) + inst = get_object_type_by_name(oinfo.type)(odb, oinfo.binsha) + inst.size = oinfo.size + return inst + + def _set_cache_(self, attr): + """Retrieve object information""" + if attr == "size": + oinfo = self.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 bin_to_hex(self.binsha) + + 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""" - return bin_to_hex(self.binsha) + @property + def hexsha(self): + """:return: 40 byte hex version of our 20 byte binary sha""" + return bin_to_hex(self.binsha) - @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.odb.stream(self.binsha) + @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.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.odb.stream(self.binsha) - stream_copy(istream, ostream) - return self - + 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.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, odb, binsha, mode=None, path=None): - """Initialize a newly instanced IndexObject - :param odb: is the object database 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__(odb, 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( "path and mode attributes must have been set during %s object creation" % 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. - :raise UnsupportedOperation: if underlying odb does not support the required method to obtain a working dir""" - # TODO: Here we suddenly need something better than a plain object database - # which indicates our odb should better be named repo ! - root = '' - if isinstance(self.odb, RepositoryPathsMixin): - root = self.odb.working_tree_dir - else: - raise UnsupportedOperation("Cannot provide absolute path from a database without Repository path support") - #END handle odb type - return join_path_native(root, self.path) - + """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, odb, binsha, mode=None, path=None): + """Initialize a newly instanced IndexObject + :param odb: is the object database 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__(odb, 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( "path and mode attributes must have been set during %s object creation" % 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. + :raise UnsupportedOperation: if underlying odb does not support the required method to obtain a working dir""" + # TODO: Here we suddenly need something better than a plain object database + # which indicates our odb should better be named repo ! + root = '' + if isinstance(self.odb, RepositoryPathsMixin): + root = self.odb.working_tree_dir + else: + raise UnsupportedOperation("Cannot provide absolute path from a database without Repository path support") + #END handle odb type + return join_path_native(root, self.path) + |