gitpython-4635/git/objects/tree.py at master · ali-security/gitpython-4635 · 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

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

# tree.py

# This module is part of GitPython and is released under

# the BSD License: http://www.opensource.org/licenses/bsd-license.php

from git.util import join_path

import git.diff as diff

from git.util import to_bin_sha

from . import util

from .base import IndexObject

from .blob import Blob

from .submodule.base import Submodule

from .fun import (

tree_entries_from_data,

tree_to_stream

)

cmp = lambda a, b: (a > b) - (a < b)

__all__ = ("TreeModifier", "Tree")

def git_cmp(t1, t2):

a, b = t1[2], t2[2]

len_a, len_b = len(a), len(b)

min_len = min(len_a, len_b)

min_cmp = cmp(a[:min_len], b[:min_len])

if min_cmp:

return min_cmp

return len_a - len_b

def merge_sort(a, cmp):

if len(a) < 2:

return

mid = len(a) // 2

lefthalf = a[:mid]

righthalf = a[mid:]

merge_sort(lefthalf, cmp)

merge_sort(righthalf, cmp)

i = 0

j = 0

k = 0

while i < len(lefthalf) and j < len(righthalf):

if cmp(lefthalf[i], righthalf[j]) <= 0:

a[k] = lefthalf[i]

i = i + 1

else:

a[k] = righthalf[j]

j = j + 1

k = k + 1

while i < len(lefthalf):

a[k] = lefthalf[i]

i = i + 1

k = k + 1

while j < len(righthalf):

a[k] = righthalf[j]

j = j + 1

k = k + 1

class TreeModifier(object):

"""A utility class providing methods to alter the underlying cache in a list-like fashion.

Once all adjustments are complete, the _cache, which really is a reference to

the cache of a tree, will be sorted. Assuring it will be in a serializable state"""

__slots__ = '_cache'

def __init__(self, cache):

self._cache = cache

def _index_by_name(self, name):

""":return: index of an item with name, or -1 if not found"""

for i, t in enumerate(self._cache):

if t[2] == name:

return i

# END found item

# END for each item in cache

return -1

#{ Interface

def set_done(self):

"""Call this method once you are done modifying the tree information.

It may be called several times, but be aware that each call will cause

a sort operation

:return self:"""

merge_sort(self._cache, git_cmp)

return self

#} END interface

#{ Mutators

def add(self, sha, mode, name, force=False):

"""Add the given item to the tree. If an item with the given name already

exists, nothing will be done, but a ValueError will be raised if the

sha and mode of the existing item do not match the one you add, unless

force is True

:param sha: The 20 or 40 byte sha of the item to add

:param mode: int representing the stat compatible mode of the item

:param force: If True, an item with your name and information will overwrite

any existing item with the same name, no matter which information it has

:return: self"""

if '/' in name:

raise ValueError("Name must not contain '/' characters")

if (mode >> 12) not in Tree._map_id_to_type:

raise ValueError("Invalid object type according to mode %o" % mode)

sha = to_bin_sha(sha)

index = self._index_by_name(name)

item = (sha, mode, name)

if index == -1:

self._cache.append(item)

else:

if force:

self._cache[index] = item

else:

ex_item = self._cache[index]

if ex_item[0] != sha or ex_item[1] != mode:

raise ValueError("Item %r existed with different properties" % name)

# END handle mismatch

# END handle force

# END handle name exists

return self

def add_unchecked(self, binsha, mode, name):

"""Add the given item to the tree, its correctness is assumed, which

puts the caller into responsibility to assure the input is correct.

For more information on the parameters, see ``add``

:param binsha: 20 byte binary sha"""

self._cache.append((binsha, mode, name))

def __delitem__(self, name):

"""Deletes an item with the given name if it exists"""

index = self._index_by_name(name)

if index > -1:

del(self._cache[index])

#} END mutators

class Tree(IndexObject, diff.Diffable, util.Traversable, util.Serializable):

"""Tree objects represent an ordered list of Blobs and other Trees.

``Tree as a list``::

Access a specific blob using the

tree['filename'] notation.

You may as well access by index

blob = tree[0]

"""

type = "tree"

__slots__ = "_cache"

# actual integer ids for comparison

commit_id = 0o16 # equals stat.S_IFDIR | stat.S_IFLNK - a directory link

blob_id = 0o10

symlink_id = 0o12

tree_id = 0o04

_map_id_to_type = {

commit_id: Submodule,

blob_id: Blob,

symlink_id: Blob

# tree id added once Tree is defined

}

def __init__(self, repo, binsha, mode=tree_id << 12, path=None):

super(Tree, self).__init__(repo, binsha, mode, path)

@classmethod

def _get_intermediate_items(cls, index_object):

if index_object.type == "tree":

return tuple(index_object._iter_convert_to_object(index_object._cache))

return ()

def _set_cache_(self, attr):

if attr == "_cache":

# Set the data when we need it

ostream = self.repo.odb.stream(self.binsha)

self._cache = tree_entries_from_data(ostream.read())

else:

super(Tree, self)._set_cache_(attr)

# END handle attribute

def _iter_convert_to_object(self, iterable):

"""Iterable yields tuples of (binsha, mode, name), which will be converted

to the respective object representation"""

for binsha, mode, name in iterable:

path = join_path(self.path, name)

try:

yield self._map_id_to_type[mode >> 12](self.repo, binsha, mode, path)

except KeyError as e:

raise TypeError("Unknown mode %o found in tree data for path '%s'" % (mode, path)) from e

# END for each item

def join(self, file):

"""Find the named object in this tree's contents

:return: ``git.Blob`` or ``git.Tree`` or ``git.Submodule``

:raise KeyError: if given file or tree does not exist in tree"""

msg = "Blob or Tree named %r not found"

if '/' in file:

tree = self

item = self

tokens = file.split('/')

for i, token in enumerate(tokens):

item = tree[token]

if item.type == 'tree':

tree = item

else:

# safety assertion - blobs are at the end of the path

if i != len(tokens) - 1:

raise KeyError(msg % file)

return item

# END handle item type

# END for each token of split path

if item == self:

raise KeyError(msg % file)

return item

else:

for info in self._cache:

if info[2] == file: # [2] == name

return self._map_id_to_type[info[1] >> 12](self.repo, info[0], info[1],

join_path(self.path, info[2]))

# END for each obj

raise KeyError(msg % file)

# END handle long paths

def __div__(self, file):

"""For PY2 only"""

return self.join(file)

def __truediv__(self, file):

"""For PY3 only"""

return self.join(file)

@property

def trees(self):

""":return: list(Tree, ...) list of trees directly below this tree"""

return [i for i in self if i.type == "tree"]

@property

def blobs(self):

""":return: list(Blob, ...) list of blobs directly below this tree"""

return [i for i in self if i.type == "blob"]

@property

def cache(self):

"""

:return: An object allowing to modify the internal cache. This can be used

to change the tree's contents. When done, make sure you call ``set_done``

on the tree modifier, or serialization behaviour will be incorrect.

See the ``TreeModifier`` for more information on how to alter the cache"""

return TreeModifier(self._cache)

def traverse(self, predicate=lambda i, d: True,

prune=lambda i, d: False, depth=-1, branch_first=True,

visit_once=False, ignore_self=1):

"""For documentation, see util.Traversable.traverse

Trees are set to visit_once = False to gain more performance in the traversal"""

return super(Tree, self).traverse(predicate, prune, depth, branch_first, visit_once, ignore_self)

# List protocol

def __getslice__(self, i, j):

return list(self._iter_convert_to_object(self._cache[i:j]))

def __iter__(self):

return self._iter_convert_to_object(self._cache)

def __len__(self):

return len(self._cache)

def __getitem__(self, item):

if isinstance(item, int):

info = self._cache[item]

return self._map_id_to_type[info[1] >> 12](self.repo, info[0], info[1], join_path(self.path, info[2]))

if isinstance(item, str):

# compatibility

return self.join(item)

# END index is basestring

raise TypeError("Invalid index type: %r" % item)

def __contains__(self, item):

if isinstance(item, IndexObject):

for info in self._cache:

if item.binsha == info[0]:

return True

# END compare sha

# END for each entry

# END handle item is index object

# compatibility

# treat item as repo-relative path

path = self.path

for info in self._cache:

if item == join_path(path, info[2]):

return True

# END for each item

return False

def __reversed__(self):

return reversed(self._iter_convert_to_object(self._cache))

def _serialize(self, stream):

"""Serialize this tree into the stream. Please note that we will assume

our tree data to be in a sorted state. If this is not the case, serialization

will not generate a correct tree representation as these are assumed to be sorted

by algorithms"""

tree_to_stream(self._cache, stream.write)

return self

def _deserialize(self, stream):

self._cache = tree_entries_from_data(stream.read())

return self

# END tree

# finalize map definition

Tree._map_id_to_type[Tree.tree_id] = Tree

gitpython-4635/git/objects/tree.py at master · ali-security/gitpython-4635 · GitHub

Repository navigation

Expand file tree

Breadcrumbs

tree.py

Latest commit

History

Breadcrumbs

tree.py

File metadata and controls