This file is indexed.

/usr/share/pyshared/git/objects/fun.py is in python-git 0.3.2~RC1-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
"""Module with functions which are supposed to be as fast as possible"""
from stat import S_ISDIR

__all__ = ('tree_to_stream', 'tree_entries_from_data', 'traverse_trees_recursive',
			'traverse_tree_recursive')


				

def tree_to_stream(entries, write):
	"""Write the give list of entries into a stream using its write method
	:param entries: **sorted** list of tuples with (binsha, mode, name)
	:param write: write method which takes a data string"""
	ord_zero = ord('0')
	bit_mask = 7			# 3 bits set
	
	for binsha, mode, name in entries:
		mode_str = ''
		for i in xrange(6):
			mode_str = chr(((mode >> (i*3)) & bit_mask) + ord_zero) + mode_str
		# END for each 8 octal value
		
		# git slices away the first octal if its zero
		if mode_str[0] == '0':
			mode_str = mode_str[1:]
		# END save a byte

		# here it comes:  if the name is actually unicode, the replacement below
		# will not work as the binsha is not part of the ascii unicode encoding - 
		# hence we must convert to an utf8 string for it to work properly.
		# According to my tests, this is exactly what git does, that is it just
		# takes the input literally, which appears to be utf8 on linux.
		if isinstance(name, unicode):
			name = name.encode("utf8")
		write("%s %s\0%s" % (mode_str, name, binsha)) 
	# END for each item


def tree_entries_from_data(data):
	"""Reads the binary representation of a tree and returns tuples of Tree items
	:param data: data block with tree data
	:return: list(tuple(binsha, mode, tree_relative_path), ...)"""
	ord_zero = ord('0')
	len_data = len(data)
	i = 0
	out = list()
	while i < len_data:
		mode = 0
		
		# read mode
		# Some git versions truncate the leading 0, some don't
		# The type will be extracted from the mode later
		while data[i] != ' ':
			# move existing mode integer up one level being 3 bits
			# and add the actual ordinal value of the character
			mode = (mode << 3) + (ord(data[i]) - ord_zero)
			i += 1
		# END while reading mode
		
		# byte is space now, skip it
		i += 1
		
		# parse name, it is NULL separated
		
		ns = i
		while data[i] != '\0':
			i += 1
		# END while not reached NULL
		
		# default encoding for strings in git is utf8
		# Only use the respective unicode object if the byte stream was encoded
		name = data[ns:i]
		name_enc = name.decode("utf-8")
		if len(name) > len(name_enc):
			name = name_enc
		# END handle encoding
		
		# byte is NULL, get next 20
		i += 1
		sha = data[i:i+20]
		i = i + 20
		out.append((sha, mode, name))
	# END for each byte in data stream
	return out
	
	
def _find_by_name(tree_data, name, is_dir, start_at):
	"""return data entry matching the given name and tree mode
	or None.
	Before the item is returned, the respective data item is set 
	None in the tree_data list to mark it done"""
	try:
		item = tree_data[start_at]
		if item and  item[2] == name and S_ISDIR(item[1]) == is_dir:
			tree_data[start_at] = None
			return item
	except IndexError:
		pass
	# END exception handling
	for index, item in enumerate(tree_data):
		if item and item[2] == name and S_ISDIR(item[1]) == is_dir:
			tree_data[index] = None
			return item
		# END if item matches
	# END for each item
	return None

def _to_full_path(item, path_prefix):
	"""Rebuild entry with given path prefix"""
	if not item:
		return item
	return (item[0], item[1], path_prefix+item[2])
	
def traverse_trees_recursive(odb, tree_shas, path_prefix):
	"""
	:return: list with entries according to the given binary tree-shas. 
		The result is encoded in a list
		of n tuple|None per blob/commit, (n == len(tree_shas)), where 
		* [0] == 20 byte sha
		* [1] == mode as int
		* [2] == path relative to working tree root
		The entry tuple is None if the respective blob/commit did not 
		exist in the given tree.
	:param tree_shas: iterable of shas pointing to trees. All trees must 
		be on the same level. A tree-sha may be None in which case None
	:param path_prefix: a prefix to be added to the returned paths on this level, 
		set it '' for the first iteration
	:note: The ordering of the returned items will be partially lost"""
	trees_data = list()
	nt = len(tree_shas)
	for tree_sha in tree_shas:
		if tree_sha is None:
			data = list()
		else:
			data = tree_entries_from_data(odb.stream(tree_sha).read())
		# END handle muted trees
		trees_data.append(data)
	# END for each sha to get data for
	
	out = list()
	out_append = out.append
	
	# find all matching entries and recursively process them together if the match
	# is a tree. If the match is a non-tree item, put it into the result.
	# Processed items will be set None
	for ti, tree_data in enumerate(trees_data):
		for ii, item in enumerate(tree_data):
			if not item:
				continue
			# END skip already done items
			entries = [ None for n in range(nt) ]
			entries[ti] = item
			sha, mode, name = item							# its faster to unpack
			is_dir = S_ISDIR(mode)							# type mode bits
			
			# find this item in all other tree data items
			# wrap around, but stop one before our current index, hence 
			# ti+nt, not ti+1+nt
			for tio in range(ti+1, ti+nt):
				tio = tio % nt
				entries[tio] = _find_by_name(trees_data[tio], name, is_dir, ii)
			# END for each other item data
			
			# if we are a directory, enter recursion
			if is_dir:
				out.extend(traverse_trees_recursive(odb, [((ei and ei[0]) or None) for ei in entries], path_prefix+name+'/'))
			else:
				out_append(tuple(_to_full_path(e, path_prefix) for e in entries))
			# END handle recursion
			
			# finally mark it done
			tree_data[ii] = None
		# END for each item
		
		# we are done with one tree, set all its data empty
		del(tree_data[:])
	# END for each tree_data chunk
	return out
	
def traverse_tree_recursive(odb, tree_sha, path_prefix):
	"""
	:return: list of entries of the tree pointed to by the binary tree_sha. An entry
		has the following format:
		* [0] 20 byte sha
		* [1] mode as int
		* [2] path relative to the repository
	:param path_prefix: prefix to prepend to the front of all returned paths"""
	entries = list()
	data = tree_entries_from_data(odb.stream(tree_sha).read())
	
	# unpacking/packing is faster than accessing individual items
	for sha, mode, name in data:
		if S_ISDIR(mode):
			entries.extend(traverse_tree_recursive(odb, sha, path_prefix+name+'/'))
		else:
			entries.append((sha, mode, path_prefix+name))
	# END for each item
	
	return entries