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cache: check of cache corruption

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Signed-off-by: Ruslan Kuprieiev <[email protected]>
This commit is contained in:
Ruslan Kuprieiev
2018-03-12 00:58:45 +02:00
parent 3091564e10
commit 0cd0e6700f
5 changed files with 102 additions and 78 deletions
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dvc/cache.py
+4
View File
@@ -33,6 +33,10 @@ class Cache(object):
def get(self, md5):
return os.path.join(self.cache_dir, md5[0:2], md5[2:])
def path_to_md5(self, path):
relpath = os.path.relpath(path, self.cache_dir)
return os.path.dirname(relpath) + os.path.basename(relpath)
def find_cache(self, files):
file_set = set(files)
cached = {}
dvc/output.py
+15 -36
View File
@@ -70,13 +70,7 @@ class Dependency(object):
if not os.path.exists(self.path):
return True
state = self.project.state.get(self.path)
if state and state.mtime == self.mtime() and state.inode == self.inode():
md5 = state.md5
else:
md5 = self.compute_md5()
return self.md5 != md5
return self.project.state.changed(self.path, self.md5)
def changed(self):
return self._changed_md5()
@@ -85,18 +79,6 @@ class Dependency(object):
def is_dir_cache(cache):
return cache.endswith(Output.MD5_DIR_SUFFIX)
def compute_md5(self):
if os.path.isdir(self.path):
return dirhash(self.path, hashfunc='md5') + self.MD5_DIR_SUFFIX
else:
return file_md5(self.path)[0]
def mtime(self):
return os.path.getmtime(self.path)
def inode(self):
return System.inode(self.path)
def save(self):
if not os.path.exists(self.path):
raise CmdOutputDoesNotExistError(self.rel_path)
@@ -104,15 +86,7 @@ class Dependency(object):
if not os.path.isfile(self.path) and not os.path.isdir(self.path):
raise CmdOutputIsNotFileOrDirError(self.rel_path)
state = self.project.state.get(self.path)
if state and state.mtime == self.mtime() and state.inode == self.inode():
md5 = state.md5
msg = u'\'{}\' using md5 {} from state file'
self.project.logger.debug(msg.format(self.dvc_path, md5))
self.md5 = md5
else:
self.md5 = self.compute_md5()
self.project.state.update(self.path, self.md5, self.mtime(), self.inode())
self.md5 = self.project.state.update(self.path).md5
def dumpd(self, cwd):
return {
@@ -182,11 +156,21 @@ class Output(Dependency):
def loads_from(cls, project, s_list, use_cache=False, cwd=os.curdir):
return [cls.loads(project, x, use_cache=use_cache, cwd=cwd) for x in s_list]
def _changed_cache(self, cache):
state = self.project.state.update(cache)
if state.md5 != self.project.cache.path_to_md5(cache):
self.project.logger.debug('Corrupted cache file {}'.format(cache))
self.project._remove_cache_file(cache)
return True
return False
def _changed_file(self, path, cache):
if os.path.isfile(path) and \
os.path.isfile(cache) and \
System.samefile(path, cache) and \
os.stat(cache).st_mode & stat.S_IREAD:
os.stat(cache).st_mode & stat.S_IREAD and \
not self._changed_cache(cache):
return False
return True
@@ -319,13 +303,8 @@ class Output(Dependency):
path = os.path.join(root, fname)
relpath = os.path.relpath(path, self.path)
state = self.project.state.get(path)
if state and state.mtime == mtime and state.inode == inode:
md5 = state.md5
else:
md5 = file_md5(path)[0]
dir_info.append({self.PARAM_RELPATH: relpath, self.PARAM_MD5: md5})
state = self.project.state.update(path)
dir_info.append({self.PARAM_RELPATH: relpath, self.PARAM_MD5: state.md5})
return dir_info
dvc/state.py
+44 -23
View File
@@ -1,22 +1,22 @@
import os
import tinydb
from checksumdir import dirhash
from dvc.system import System
from dvc.output import Output
from dvc.utils import file_md5
from dvc.exceptions import DvcException
class StateEntry(object):
PARAM_PATH = 'path'
PARAM_MTIME = 'mtime'
PARAM_MD5 = 'md5'
PARAM_INODE = 'inode'
def __init__(self, root_dir, path, md5, mtime, inode):
self.root_dir = root_dir
self.path = path
def __init__(self, md5, mtime, inode):
self.mtime = mtime
self.md5 = md5
self.inode = inode
self.dvc_path = os.path.relpath(self.path, self.root_dir)
def update(self, md5, mtime, inode):
self.mtime = mtime
@@ -24,16 +24,14 @@ class StateEntry(object):
self.inode = inode
@staticmethod
def loadd(root_dir, d):
path = os.path.join(root_dir, d[StateEntry.PARAM_PATH])
def loadd(d):
mtime = d[StateEntry.PARAM_MTIME]
md5 = d[StateEntry.PARAM_MD5]
inode = d[StateEntry.PARAM_INODE]
return StateEntry(root_dir, path, md5, mtime, inode)
return StateEntry(md5, mtime, inode)
def dumpd(self):
return {
self.PARAM_PATH: self.dvc_path,
self.PARAM_MD5: self.md5,
self.PARAM_MTIME: self.mtime,
self.PARAM_INODE: self.inode
@@ -58,27 +56,50 @@ class State(object):
def init(root_dir, dvc_dir):
return State(root_dir, dvc_dir)
def update(self, path, md5, mtime, inode):
existing = self.get(path)
if not existing:
return self.add(path, md5, mtime, inode)
def compute_md5(self, path):
if os.path.isdir(path):
return dirhash(path, hashfunc='md5') + Output.MD5_DIR_SUFFIX
else:
return file_md5(path)[0]
state = StateEntry(self.root_dir, path, md5, mtime, inode)
self._db.update(state.dumpd(), self._q.path == state.dvc_path)
def changed(self, path, md5):
state = self.update(path)
return state.md5 != md5
def update(self, path):
mtime = os.path.getmtime(path)
inode = System.inode(path)
state = self._get(inode, mtime)
if state:
return state
md5 = self.compute_md5(path)
state = StateEntry(md5, mtime, inode)
d = state.dumpd()
if self._db.contains(self._q.inode == inode):
self._db.update(d, self._q.inode == inode)
else:
self._db.insert(d)
return state
def add(self, path, md5, mtime, inode):
entry = StateEntry(self.root_dir, path, md5, mtime, inode)
self._db.insert(entry.dumpd())
return entry
def get(self, path):
d_list = self._db.search(self._q.path == os.path.relpath(path, self.root_dir))
def _get(self, inode, mtime):
d_list = self._db.search(self._q.inode == inode)
if not len(d_list):
return None
if len(d_list) > 1:
raise StateDuplicateError()
return StateEntry.loadd(self.root_dir, d_list[0])
state = StateEntry.loadd(d_list[0])
if mtime == state.mtime and inode == state.inode:
return state
return None
def get(self, path):
mtime = os.path.getmtime(path)
inode = System.inode(path)
return self._get(inode, mtime)
tests/test_checkout.py
+15
View File
@@ -26,6 +26,21 @@ class TestCheckout(TestRepro):
self.assertTrue(filecmp.cmp(self.FOO, self.orig))
class TestCheckoutCorruptedCacheFile(TestRepro):
def test(self):
cache = self.foo_stage.outs[0].cache
os.chmod(cache, stat.S_IWRITE)
with open(cache, 'a') as fd:
fd.write('1')
os.chmod(cache, stat.S_IREAD)
self.dvc.checkout()
self.assertFalse(os.path.isfile(self.FOO))
self.assertFalse(os.path.isfile(cache))
class TestCmdCheckout(TestCheckout):
def test(self):
ret = main(['checkout'])
tests/test_state.py
+24 -19
View File
@@ -1,35 +1,40 @@
import os
import stat
from dvc.system import System
from dvc.state import State, StateEntry
from dvc.utils import file_md5
from tests.basic_env import TestDvc
class TestState(TestDvc):
def test_update(self):
path = os.path.join(self.dvc.root_dir, '1')
md5_1 = '1'
md5_2 = '2'
mtime_1 = 1
mtime_2 = 2
inode_1 = 1
inode_2 = 2
path = os.path.join(self.dvc.root_dir, self.FOO)
md5 = file_md5(path)[0]
mtime = os.path.getmtime(path)
inode = System.inode(path)
state = State(self.dvc.root_dir, self.dvc.dvc_dir)
self.assertIsNone(state.get(path))
state.add(path, md5_1, mtime_1, inode_1)
state.update(path)
entry = state.get(path)
self.assertIsInstance(entry, StateEntry)
self.assertEqual(entry.path, path)
self.assertEqual(entry.md5, md5_1)
self.assertEqual(entry.mtime, mtime_1)
self.assertEqual(entry.inode, inode_1)
self.assertEqual(entry.md5, md5)
self.assertEqual(entry.mtime, mtime)
self.assertEqual(entry.inode, inode)
state.update(path, md5_2, mtime_2, inode_2)
entry = state.get(path)
os.chmod(path, stat.S_IWRITE)
os.unlink(path)
with open(path, 'w+') as fd:
fd.write('1')
md5 = file_md5(path)[0]
mtime = os.path.getmtime(path)
inode = System.inode(path)
entry = state.update(path)
self.assertIsInstance(entry, StateEntry)
self.assertEqual(entry.path, path)
self.assertEqual(entry.md5, md5_2)
self.assertEqual(entry.mtime, mtime_2)
self.assertEqual(entry.inode, inode_2)
self.assertEqual(entry.md5, md5)
self.assertEqual(entry.mtime, mtime)
self.assertEqual(entry.inode, inode)