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Hard link support and some stat restore fixes
This commit is contained in:
Jonas Borgström
parent
63c9966f12
commit
afdabb623a
1 changed files with 65 additions and 23 deletions
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@ -22,6 +22,7 @@ def __init__(self, store, cache, name=None):
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self.items = []
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self.chunks = []
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self.chunk_idx = {}
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self.hard_links = {}
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if name:
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self.open(name)
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@ -80,6 +81,7 @@ def list(self):
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def extract(self, dest=None):
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dest = dest or os.getcwdu()
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dir_stat_queue = []
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for item in self.items:
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assert item['path'][0] not in ('/', '\\', ':')
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path = os.path.join(dest, item['path'].decode('utf-8'))
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@ -87,11 +89,25 @@ def extract(self, dest=None):
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logging.info(path)
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if not os.path.exists(path):
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os.makedirs(path)
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dir_stat_queue.append((path, item))
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continue
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elif item['type'] == 'SYMLINK':
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logging.info('%s => %s', path, item['source'])
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if not os.path.exists(os.path.dirname(path)):
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os.makedirs(os.path.dirname(path))
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os.symlink(item['source'], path)
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source = item['source']
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logging.info('%s -> %s', path, source)
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if os.path.exists(path):
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os.unlink(path)
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os.symlink(source, path)
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self.restore_stat(path, item, call_utime=False)
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elif item['type'] == 'HARDLINK':
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if not os.path.exists(os.path.dirname(path)):
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os.makedirs(os.path.dirname(path))
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source = os.path.join(dest, item['source'])
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logging.info('%s => %s', path, source)
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if os.path.exists(path):
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os.unlink(path)
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os.link(source, path)
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elif item['type'] == 'FILE':
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logging.info(path)
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if not os.path.exists(os.path.dirname(path)):
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@ -106,14 +122,23 @@ def extract(self, dest=None):
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raise Exception('Invalid chunk checksum')
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data = zlib.decompress(data)
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fd.write(data)
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os.chmod(path, item['mode'])
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uid = user2uid(item['user']) or item['uid']
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gid = group2gid(item['group']) or item['gid']
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try:
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os.chown(path, uid, gid)
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except OSError:
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pass
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os.utime(path, (item['ctime'], item['mtime']))
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self.restore_stat(path, item)
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else:
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raise Exception('Unknown archive item type %r' % item['type'])
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if dir_stat_queue and not path.startswith(dir_stat_queue[-1][0]):
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self.restore_stat(*dir_stat_queue.pop())
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def restore_stat(self, path, item, call_utime=True):
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os.lchmod(path, item['mode'])
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uid = user2uid(item['user']) or item['uid']
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gid = group2gid(item['group']) or item['gid']
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try:
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os.lchown(path, uid, gid)
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except OSError:
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pass
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if call_utime:
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# FIXME: We should really call futimes here (c extension required)
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os.utime(path, (item['ctime'], item['mtime']))
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def verify(self):
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for item in self.items:
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@ -140,12 +165,11 @@ def delete(self, cache):
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def _walk(self, path):
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st = os.lstat(path)
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yield path, st
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if stat.S_ISDIR(st.st_mode):
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for f in os.listdir(path):
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for x in self._walk(os.path.join(path, f)):
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yield x
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else:
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yield path, st
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def create(self, name, paths, cache):
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if name in cache.archives:
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@ -155,7 +179,7 @@ def create(self, name, paths, cache):
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if stat.S_ISDIR(st.st_mode):
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self.process_dir(path, st)
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elif stat.S_ISLNK(st.st_mode):
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self.process_link(path, st)
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self.process_symlink(path, st)
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elif stat.S_ISREG(st.st_mode):
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self.process_file(path, st)
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else:
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@ -167,30 +191,50 @@ def create(self, name, paths, cache):
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def process_dir(self, path, st):
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path = path.lstrip('/\\:')
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logging.info(path)
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self.items.append({'type': 'DIRECTORY', 'path': path})
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self.items.append({
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'type': 'DIRECTORY', 'path': path,
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'mode': st.st_mode,
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'uid': st.st_uid, 'user': uid2user(st.st_uid),
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'gid': st.st_gid, 'group': gid2group(st.st_gid),
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'ctime': st.st_ctime, 'mtime': st.st_mtime,
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})
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def process_link(self, path, st):
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def process_symlink(self, path, st):
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source = os.readlink(path)
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path = path.lstrip('/\\:')
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logging.info('%s => %s', path, source)
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self.items.append({'type': 'SYMLINK', 'path': path, 'source': source})
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logging.info('%s -> %s', path, source)
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self.items.append({
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'type': 'SYMLINK', 'path': path, 'source': source,
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'mode': st.st_mode,
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'uid': st.st_uid, 'user': uid2user(st.st_uid),
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'gid': st.st_gid, 'group': gid2group(st.st_gid),
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'ctime': st.st_ctime, 'mtime': st.st_mtime,
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})
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def process_file(self, path, st):
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safe_path = path.lstrip('/\\:')
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if st.st_nlink > 1:
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source = self.hard_links.get((st.st_ino, st.st_dev))
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if (st.st_ino, st.st_dev) in self.hard_links:
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logging.info('%s => %s', path, source)
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self.items.append({ 'type': 'HARDLINK',
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'path': path, 'source': source})
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return
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else:
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self.hard_links[st.st_ino, st.st_dev] = safe_path
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try:
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fd = open(path, 'rb')
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except IOError, e:
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logging.error(e)
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return
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with fd:
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path = path.lstrip('/\\:')
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logging.info(path)
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logging.info(safe_path)
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chunks = []
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size = 0
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for chunk in chunkify(fd, CHUNK_SIZE, 30):
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chunks.append(self.process_chunk(chunk))
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size += len(chunk)
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self.items.append({
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'type': 'FILE', 'path': path, 'chunks': chunks, 'size': size,
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'type': 'FILE', 'path': safe_path, 'chunks': chunks, 'size': size,
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'mode': st.st_mode,
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'uid': st.st_uid, 'user': uid2user(st.st_uid),
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'gid': st.st_gid, 'group': gid2group(st.st_gid),
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@ -208,5 +252,3 @@ def process_chunk(self, data):
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self.chunk_idx[idx] = id
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return idx
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