20
20
lines by NL. The field delimiters are ommitted in the grammar, line delimiters
21
21
are not - this is done for clarity of reading. All string data is in utf8.
23
MINIKIND = "f" | "d" | "l" | "a" | "r" | "t";
26
WHOLE_NUMBER = {digit}, digit;
28
REVISION_ID = a non-empty utf8 string;
30
dirstate format = header line, full checksum, row count, parent details,
31
ghost_details, entries;
32
header line = "#bazaar dirstate flat format 3", NL;
33
full checksum = "crc32: ", ["-"], WHOLE_NUMBER, NL;
34
row count = "num_entries: ", WHOLE_NUMBER, NL;
35
parent_details = WHOLE NUMBER, {REVISION_ID}* NL;
36
ghost_details = WHOLE NUMBER, {REVISION_ID}*, NL;
38
entry = entry_key, current_entry_details, {parent_entry_details};
39
entry_key = dirname, basename, fileid;
40
current_entry_details = common_entry_details, working_entry_details;
41
parent_entry_details = common_entry_details, history_entry_details;
42
common_entry_details = MINIKIND, fingerprint, size, executable
43
working_entry_details = packed_stat
44
history_entry_details = REVISION_ID;
47
fingerprint = a nonempty utf8 sequence with meaning defined by minikind.
49
Given this definition, the following is useful to know:
50
entry (aka row) - all the data for a given key.
51
entry[0]: The key (dirname, basename, fileid)
55
entry[1]: The tree(s) data for this path and id combination.
56
entry[1][0]: The current tree
57
entry[1][1]: The second tree
59
For an entry for a tree, we have (using tree 0 - current tree) to demonstrate:
60
entry[1][0][0]: minikind
61
entry[1][0][1]: fingerprint
63
entry[1][0][3]: executable
64
entry[1][0][4]: packed_stat
66
entry[1][1][4]: revision_id
25
MINIKIND = "f" | "d" | "l" | "a" | "r" | "t";
28
WHOLE_NUMBER = {digit}, digit;
30
REVISION_ID = a non-empty utf8 string;
32
dirstate format = header line, full checksum, row count, parent details,
33
ghost_details, entries;
34
header line = "#bazaar dirstate flat format 3", NL;
35
full checksum = "crc32: ", ["-"], WHOLE_NUMBER, NL;
36
row count = "num_entries: ", WHOLE_NUMBER, NL;
37
parent_details = WHOLE NUMBER, {REVISION_ID}* NL;
38
ghost_details = WHOLE NUMBER, {REVISION_ID}*, NL;
40
entry = entry_key, current_entry_details, {parent_entry_details};
41
entry_key = dirname, basename, fileid;
42
current_entry_details = common_entry_details, working_entry_details;
43
parent_entry_details = common_entry_details, history_entry_details;
44
common_entry_details = MINIKIND, fingerprint, size, executable
45
working_entry_details = packed_stat
46
history_entry_details = REVISION_ID;
49
fingerprint = a nonempty utf8 sequence with meaning defined by minikind.
51
Given this definition, the following is useful to know::
53
entry (aka row) - all the data for a given key.
54
entry[0]: The key (dirname, basename, fileid)
58
entry[1]: The tree(s) data for this path and id combination.
59
entry[1][0]: The current tree
60
entry[1][1]: The second tree
62
For an entry for a tree, we have (using tree 0 - current tree) to demonstrate::
64
entry[1][0][0]: minikind
65
entry[1][0][1]: fingerprint
67
entry[1][0][3]: executable
68
entry[1][0][4]: packed_stat
72
entry[1][1][4]: revision_id
68
74
There may be multiple rows at the root, one per id present in the root, so the
69
in memory root row is now:
70
self._dirblocks[0] -> ('', [entry ...]),
71
and the entries in there are
74
entries[0][2]: file_id
75
entries[1][0]: The tree data for the current tree for this fileid at /
79
'r' is a relocated entry: This path is not present in this tree with this id,
80
but the id can be found at another location. The fingerprint is used to
81
point to the target location.
82
'a' is an absent entry: In that tree the id is not present at this path.
83
'd' is a directory entry: This path in this tree is a directory with the
84
current file id. There is no fingerprint for directories.
85
'f' is a file entry: As for directory, but it's a file. The fingerprint is the
86
sha1 value of the file's canonical form, i.e. after any read filters have
87
been applied to the convenience form stored in the working tree.
88
'l' is a symlink entry: As for directory, but a symlink. The fingerprint is the
90
't' is a reference to a nested subtree; the fingerprint is the referenced
75
in memory root row is now::
77
self._dirblocks[0] -> ('', [entry ...]),
79
and the entries in there are::
83
entries[0][2]: file_id
84
entries[1][0]: The tree data for the current tree for this fileid at /
89
'r' is a relocated entry: This path is not present in this tree with this
90
id, but the id can be found at another location. The fingerprint is
91
used to point to the target location.
92
'a' is an absent entry: In that tree the id is not present at this path.
93
'd' is a directory entry: This path in this tree is a directory with the
94
current file id. There is no fingerprint for directories.
95
'f' is a file entry: As for directory, but it's a file. The fingerprint is
96
the sha1 value of the file's canonical form, i.e. after any read
97
filters have been applied to the convenience form stored in the working
99
'l' is a symlink entry: As for directory, but a symlink. The fingerprint is
101
't' is a reference to a nested subtree; the fingerprint is the referenced
95
The entries on disk and in memory are ordered according to the following keys:
106
The entries on disk and in memory are ordered according to the following keys::
97
108
directory, as a list of components
101
112
--- Format 1 had the following different definition: ---
102
rows = dirname, NULL, basename, NULL, MINIKIND, NULL, fileid_utf8, NULL,
103
WHOLE NUMBER (* size *), NULL, packed stat, NULL, sha1|symlink target,
105
PARENT ROW = NULL, revision_utf8, NULL, MINIKIND, NULL, dirname, NULL,
106
basename, NULL, WHOLE NUMBER (* size *), NULL, "y" | "n", NULL,
116
rows = dirname, NULL, basename, NULL, MINIKIND, NULL, fileid_utf8, NULL,
117
WHOLE NUMBER (* size *), NULL, packed stat, NULL, sha1|symlink target,
119
PARENT ROW = NULL, revision_utf8, NULL, MINIKIND, NULL, dirname, NULL,
120
basename, NULL, WHOLE NUMBER (* size *), NULL, "y" | "n", NULL,
109
123
PARENT ROW's are emitted for every parent that is not in the ghosts details
110
124
line. That is, if the parents are foo, bar, baz, and the ghosts are bar, then
231
251
ERROR_DIRECTORY = 267
234
if not getattr(struct, '_compile', None):
235
# Cannot pre-compile the dirstate pack_stat
236
def pack_stat(st, _encode=binascii.b2a_base64, _pack=struct.pack):
237
"""Convert stat values into a packed representation."""
238
return _encode(_pack('>LLLLLL', st.st_size, int(st.st_mtime),
239
int(st.st_ctime), st.st_dev, st.st_ino & 0xFFFFFFFF,
242
# compile the struct compiler we need, so as to only do it once
243
from _struct import Struct
244
_compiled_pack = Struct('>LLLLLL').pack
245
def pack_stat(st, _encode=binascii.b2a_base64, _pack=_compiled_pack):
246
"""Convert stat values into a packed representation."""
247
# jam 20060614 it isn't really worth removing more entries if we
248
# are going to leave it in packed form.
249
# With only st_mtime and st_mode filesize is 5.5M and read time is 275ms
250
# With all entries, filesize is 5.9M and read time is maybe 280ms
251
# well within the noise margin
253
# base64 encoding always adds a final newline, so strip it off
254
# The current version
255
return _encode(_pack(st.st_size, int(st.st_mtime), int(st.st_ctime),
256
st.st_dev, st.st_ino & 0xFFFFFFFF, st.st_mode))[:-1]
257
# This is 0.060s / 1.520s faster by not encoding as much information
258
# return _encode(_pack('>LL', int(st.st_mtime), st.st_mode))[:-1]
259
# This is not strictly faster than _encode(_pack())[:-1]
260
# return '%X.%X.%X.%X.%X.%X' % (
261
# st.st_size, int(st.st_mtime), int(st.st_ctime),
262
# st.st_dev, st.st_ino, st.st_mode)
263
# Similar to the _encode(_pack('>LL'))
264
# return '%X.%X' % (int(st.st_mtime), st.st_mode)
267
254
class SHA1Provider(object):
268
255
"""An interface for getting sha1s of a file."""
411
403
self._last_block_index = None
412
404
self._last_entry_index = None
405
# The set of known hash changes
406
self._known_hash_changes = set()
407
# How many hash changed entries can we have without saving
408
self._worth_saving_limit = worth_saving_limit
409
self._config_stack = config.LocationStack(urlutils.local_path_to_url(
414
412
def __repr__(self):
415
413
return "%s(%r)" % \
416
414
(self.__class__.__name__, self._filename)
416
def _mark_modified(self, hash_changed_entries=None, header_modified=False):
417
"""Mark this dirstate as modified.
419
:param hash_changed_entries: if non-None, mark just these entries as
420
having their hash modified.
421
:param header_modified: mark the header modified as well, not just the
424
#trace.mutter_callsite(3, "modified hash entries: %s", hash_changed_entries)
425
if hash_changed_entries:
426
self._known_hash_changes.update([e[0] for e in hash_changed_entries])
427
if self._dirblock_state in (DirState.NOT_IN_MEMORY,
428
DirState.IN_MEMORY_UNMODIFIED):
429
# If the dirstate is already marked a IN_MEMORY_MODIFIED, then
430
# that takes precedence.
431
self._dirblock_state = DirState.IN_MEMORY_HASH_MODIFIED
433
# TODO: Since we now have a IN_MEMORY_HASH_MODIFIED state, we
434
# should fail noisily if someone tries to set
435
# IN_MEMORY_MODIFIED but we don't have a write-lock!
436
# We don't know exactly what changed so disable smart saving
437
self._dirblock_state = DirState.IN_MEMORY_MODIFIED
439
self._header_state = DirState.IN_MEMORY_MODIFIED
441
def _mark_unmodified(self):
442
"""Mark this dirstate as unmodified."""
443
self._header_state = DirState.IN_MEMORY_UNMODIFIED
444
self._dirblock_state = DirState.IN_MEMORY_UNMODIFIED
445
self._known_hash_changes = set()
418
447
def add(self, path, file_id, kind, stat, fingerprint):
419
448
"""Add a path to be tracked.
1483
1510
if basename_utf8:
1484
1511
parents.add((dirname_utf8, inv_entry.parent_id))
1485
1512
if old_path is None:
1486
adds.append((None, encode(new_path), file_id,
1513
old_path_utf8 = None
1515
old_path_utf8 = encode(old_path)
1516
if old_path is None:
1517
adds.append((None, new_path_utf8, file_id,
1487
1518
inv_to_entry(inv_entry), True))
1488
1519
new_ids.add(file_id)
1489
1520
elif new_path is None:
1490
deletes.append((encode(old_path), None, file_id, None, True))
1491
elif (old_path, new_path) != root_only:
1521
deletes.append((old_path_utf8, None, file_id, None, True))
1522
elif (old_path, new_path) == root_only:
1523
# change things in-place
1524
# Note: the case of a parent directory changing its file_id
1525
# tends to break optimizations here, because officially
1526
# the file has actually been moved, it just happens to
1527
# end up at the same path. If we can figure out how to
1528
# handle that case, we can avoid a lot of add+delete
1529
# pairs for objects that stay put.
1530
# elif old_path == new_path:
1531
changes.append((old_path_utf8, new_path_utf8, file_id,
1532
inv_to_entry(inv_entry)))
1493
1535
# Because renames must preserve their children we must have
1494
1536
# processed all relocations and removes before hand. The sort
1504
1546
self._update_basis_apply_deletes(deletes)
1506
1548
# Split into an add/delete pair recursively.
1507
adds.append((None, new_path_utf8, file_id,
1508
inv_to_entry(inv_entry), False))
1549
adds.append((old_path_utf8, new_path_utf8, file_id,
1550
inv_to_entry(inv_entry), False))
1509
1551
# Expunge deletes that we've seen so that deleted/renamed
1510
1552
# children of a rename directory are handled correctly.
1511
new_deletes = reversed(list(self._iter_child_entries(1,
1553
new_deletes = reversed(list(
1554
self._iter_child_entries(1, old_path_utf8)))
1513
1555
# Remove the current contents of the tree at orig_path, and
1514
1556
# reinsert at the correct new path.
1515
1557
for entry in new_deletes:
1517
source_path = entry[0][0] + '/' + entry[0][1]
1558
child_dirname, child_basename, child_file_id = entry[0]
1560
source_path = child_dirname + '/' + child_basename
1519
source_path = entry[0][1]
1562
source_path = child_basename
1520
1563
if new_path_utf8:
1521
target_path = new_path_utf8 + source_path[len(old_path):]
1565
new_path_utf8 + source_path[len(old_path_utf8):]
1567
if old_path_utf8 == '':
1524
1568
raise AssertionError("cannot rename directory to"
1526
target_path = source_path[len(old_path) + 1:]
1570
target_path = source_path[len(old_path_utf8) + 1:]
1527
1571
adds.append((None, target_path, entry[0][2], entry[1][1], False))
1528
1572
deletes.append(
1529
1573
(source_path, target_path, entry[0][2], None, False))
1530
1574
deletes.append(
1531
(encode(old_path), new_path, file_id, None, False))
1533
# changes to just the root should not require remove/insertion
1535
changes.append((encode(old_path), encode(new_path), file_id,
1536
inv_to_entry(inv_entry)))
1575
(old_path_utf8, new_path_utf8, file_id, None, False))
1537
1577
self._check_delta_ids_absent(new_ids, delta, 1)
1539
1579
# Finish expunging deletes/first half of renames.
1597
1636
# Adds are accumulated partly from renames, so can be in any input
1598
1637
# order - sort it.
1638
# TODO: we may want to sort in dirblocks order. That way each entry
1639
# will end up in the same directory, allowing the _get_entry
1640
# fast-path for looking up 2 items in the same dir work.
1641
adds.sort(key=lambda x: x[1])
1600
1642
# adds is now in lexographic order, which places all parents before
1601
1643
# their children, so we can process it linearly.
1645
st = static_tuple.StaticTuple
1603
1646
for old_path, new_path, file_id, new_details, real_add in adds:
1604
# the entry for this file_id must be in tree 0.
1605
entry = self._get_entry(0, file_id, new_path)
1606
if entry[0] is None or entry[0][2] != file_id:
1607
self._changes_aborted = True
1608
raise errors.InconsistentDelta(new_path, file_id,
1609
'working tree does not contain new entry')
1610
if real_add and entry[1][1][0] not in absent:
1611
self._changes_aborted = True
1612
raise errors.InconsistentDelta(new_path, file_id,
1613
'The entry was considered to be a genuinely new record,'
1614
' but there was already an old record for it.')
1615
# We don't need to update the target of an 'r' because the handling
1616
# of renames turns all 'r' situations into a delete at the original
1618
entry[1][1] = new_details
1647
dirname, basename = osutils.split(new_path)
1648
entry_key = st(dirname, basename, file_id)
1649
block_index, present = self._find_block_index_from_key(entry_key)
1651
self._raise_invalid(new_path, file_id,
1652
"Unable to find block for this record."
1653
" Was the parent added?")
1654
block = self._dirblocks[block_index][1]
1655
entry_index, present = self._find_entry_index(entry_key, block)
1657
if old_path is not None:
1658
self._raise_invalid(new_path, file_id,
1659
'considered a real add but still had old_path at %s'
1662
entry = block[entry_index]
1663
basis_kind = entry[1][1][0]
1664
if basis_kind == 'a':
1665
entry[1][1] = new_details
1666
elif basis_kind == 'r':
1667
raise NotImplementedError()
1669
self._raise_invalid(new_path, file_id,
1670
"An entry was marked as a new add"
1671
" but the basis target already existed")
1673
# The exact key was not found in the block. However, we need to
1674
# check if there is a key next to us that would have matched.
1675
# We only need to check 2 locations, because there are only 2
1677
for maybe_index in range(entry_index-1, entry_index+1):
1678
if maybe_index < 0 or maybe_index >= len(block):
1680
maybe_entry = block[maybe_index]
1681
if maybe_entry[0][:2] != (dirname, basename):
1682
# Just a random neighbor
1684
if maybe_entry[0][2] == file_id:
1685
raise AssertionError(
1686
'_find_entry_index didnt find a key match'
1687
' but walking the data did, for %s'
1689
basis_kind = maybe_entry[1][1][0]
1690
if basis_kind not in 'ar':
1691
self._raise_invalid(new_path, file_id,
1692
"we have an add record for path, but the path"
1693
" is already present with another file_id %s"
1694
% (maybe_entry[0][2],))
1696
entry = (entry_key, [DirState.NULL_PARENT_DETAILS,
1698
block.insert(entry_index, entry)
1700
active_kind = entry[1][0][0]
1701
if active_kind == 'a':
1702
# The active record shows up as absent, this could be genuine,
1703
# or it could be present at some other location. We need to
1705
id_index = self._get_id_index()
1706
# The id_index may not be perfectly accurate for tree1, because
1707
# we haven't been keeping it updated. However, it should be
1708
# fine for tree0, and that gives us enough info for what we
1710
keys = id_index.get(file_id, ())
1712
block_i, entry_i, d_present, f_present = \
1713
self._get_block_entry_index(key[0], key[1], 0)
1716
active_entry = self._dirblocks[block_i][1][entry_i]
1717
if (active_entry[0][2] != file_id):
1718
# Some other file is at this path, we don't need to
1721
real_active_kind = active_entry[1][0][0]
1722
if real_active_kind in 'ar':
1723
# We found a record, which was not *this* record,
1724
# which matches the file_id, but is not actually
1725
# present. Something seems *really* wrong.
1726
self._raise_invalid(new_path, file_id,
1727
"We found a tree0 entry that doesnt make sense")
1728
# Now, we've found a tree0 entry which matches the file_id
1729
# but is at a different location. So update them to be
1731
active_dir, active_name = active_entry[0][:2]
1733
active_path = active_dir + '/' + active_name
1735
active_path = active_name
1736
active_entry[1][1] = st('r', new_path, 0, False, '')
1737
entry[1][0] = st('r', active_path, 0, False, '')
1738
elif active_kind == 'r':
1739
raise NotImplementedError()
1741
new_kind = new_details[0]
1743
self._ensure_block(block_index, entry_index, new_path)
1620
1745
def _update_basis_apply_changes(self, changes):
1621
1746
"""Apply a sequence of changes to tree 1 during update_basis_by_delta.
1653
1772
null = DirState.NULL_PARENT_DETAILS
1654
1773
for old_path, new_path, file_id, _, real_delete in deletes:
1655
1774
if real_delete != (new_path is None):
1656
self._changes_aborted = True
1657
raise AssertionError("bad delete delta")
1775
self._raise_invalid(old_path, file_id, "bad delete delta")
1658
1776
# the entry for this file_id must be in tree 1.
1659
1777
dirname, basename = osutils.split(old_path)
1660
1778
block_index, entry_index, dir_present, file_present = \
1661
1779
self._get_block_entry_index(dirname, basename, 1)
1662
1780
if not file_present:
1663
self._changes_aborted = True
1664
raise errors.InconsistentDelta(old_path, file_id,
1781
self._raise_invalid(old_path, file_id,
1665
1782
'basis tree does not contain removed entry')
1666
1783
entry = self._dirblocks[block_index][1][entry_index]
1784
# The state of the entry in the 'active' WT
1785
active_kind = entry[1][0][0]
1667
1786
if entry[0][2] != file_id:
1668
self._changes_aborted = True
1669
raise errors.InconsistentDelta(old_path, file_id,
1787
self._raise_invalid(old_path, file_id,
1670
1788
'mismatched file_id in tree 1')
1672
if entry[1][0][0] != 'a':
1673
self._changes_aborted = True
1674
raise errors.InconsistentDelta(old_path, file_id,
1675
'This was marked as a real delete, but the WT state'
1676
' claims that it still exists and is versioned.')
1790
old_kind = entry[1][1][0]
1791
if active_kind in 'ar':
1792
# The active tree doesn't have this file_id.
1793
# The basis tree is changing this record. If this is a
1794
# rename, then we don't want the record here at all
1795
# anymore. If it is just an in-place change, we want the
1796
# record here, but we'll add it if we need to. So we just
1798
if active_kind == 'r':
1799
active_path = entry[1][0][1]
1800
active_entry = self._get_entry(0, file_id, active_path)
1801
if active_entry[1][1][0] != 'r':
1802
self._raise_invalid(old_path, file_id,
1803
"Dirstate did not have matching rename entries")
1804
elif active_entry[1][0][0] in 'ar':
1805
self._raise_invalid(old_path, file_id,
1806
"Dirstate had a rename pointing at an inactive"
1808
active_entry[1][1] = null
1677
1809
del self._dirblocks[block_index][1][entry_index]
1811
# This was a directory, and the active tree says it
1812
# doesn't exist, and now the basis tree says it doesn't
1813
# exist. Remove its dirblock if present
1815
present) = self._find_block_index_from_key(
1818
dir_block = self._dirblocks[dir_block_index][1]
1820
# This entry is empty, go ahead and just remove it
1821
del self._dirblocks[dir_block_index]
1679
if entry[1][0][0] == 'a':
1680
self._changes_aborted = True
1681
raise errors.InconsistentDelta(old_path, file_id,
1682
'The entry was considered a rename, but the source path'
1683
' is marked as absent.')
1684
# For whatever reason, we were asked to rename an entry
1685
# that was originally marked as deleted. This could be
1686
# because we are renaming the parent directory, and the WT
1687
# current state has the file marked as deleted.
1688
elif entry[1][0][0] == 'r':
1689
# implement the rename
1690
del self._dirblocks[block_index][1][entry_index]
1692
# it is being resurrected here, so blank it out temporarily.
1693
self._dirblocks[block_index][1][entry_index][1][1] = null
1823
# There is still an active record, so just mark this
1826
block_i, entry_i, d_present, f_present = \
1827
self._get_block_entry_index(old_path, '', 1)
1829
dir_block = self._dirblocks[block_i][1]
1830
for child_entry in dir_block:
1831
child_basis_kind = child_entry[1][1][0]
1832
if child_basis_kind not in 'ar':
1833
self._raise_invalid(old_path, file_id,
1834
"The file id was deleted but its children were "
1695
1837
def _after_delta_check_parents(self, parents, index):
1696
1838
"""Check that parents required by the delta are all intact.
2145
2289
def _get_id_index(self):
2146
"""Get an id index of self._dirblocks."""
2290
"""Get an id index of self._dirblocks.
2292
This maps from file_id => [(directory, name, file_id)] entries where
2293
that file_id appears in one of the trees.
2147
2295
if self._id_index is None:
2149
2297
for key, tree_details in self._iter_entries():
2150
id_index.setdefault(key[2], set()).add(key)
2298
self._add_to_id_index(id_index, key)
2151
2299
self._id_index = id_index
2152
2300
return self._id_index
2302
def _add_to_id_index(self, id_index, entry_key):
2303
"""Add this entry to the _id_index mapping."""
2304
# This code used to use a set for every entry in the id_index. However,
2305
# it is *rare* to have more than one entry. So a set is a large
2306
# overkill. And even when we do, we won't ever have more than the
2307
# number of parent trees. Which is still a small number (rarely >2). As
2308
# such, we use a simple tuple, and do our own uniqueness checks. While
2309
# the 'in' check is O(N) since N is nicely bounded it shouldn't ever
2310
# cause quadratic failure.
2311
file_id = entry_key[2]
2312
entry_key = static_tuple.StaticTuple.from_sequence(entry_key)
2313
if file_id not in id_index:
2314
id_index[file_id] = static_tuple.StaticTuple(entry_key,)
2316
entry_keys = id_index[file_id]
2317
if entry_key not in entry_keys:
2318
id_index[file_id] = entry_keys + (entry_key,)
2320
def _remove_from_id_index(self, id_index, entry_key):
2321
"""Remove this entry from the _id_index mapping.
2323
It is an programming error to call this when the entry_key is not
2326
file_id = entry_key[2]
2327
entry_keys = list(id_index[file_id])
2328
entry_keys.remove(entry_key)
2329
id_index[file_id] = static_tuple.StaticTuple.from_sequence(entry_keys)
2154
2331
def _get_output_lines(self, lines):
2155
2332
"""Format lines for final output.
2285
2466
trace.mutter('Not saving DirState because '
2286
2467
'_changes_aborted is set.')
2288
if (self._header_state == DirState.IN_MEMORY_MODIFIED or
2289
self._dirblock_state == DirState.IN_MEMORY_MODIFIED):
2469
# TODO: Since we now distinguish IN_MEMORY_MODIFIED from
2470
# IN_MEMORY_HASH_MODIFIED, we should only fail quietly if we fail
2471
# to save an IN_MEMORY_HASH_MODIFIED, and fail *noisily* if we
2472
# fail to save IN_MEMORY_MODIFIED
2473
if not self._worth_saving():
2291
grabbed_write_lock = False
2292
if self._lock_state != 'w':
2293
grabbed_write_lock, new_lock = self._lock_token.temporary_write_lock()
2294
# Switch over to the new lock, as the old one may be closed.
2476
grabbed_write_lock = False
2477
if self._lock_state != 'w':
2478
grabbed_write_lock, new_lock = self._lock_token.temporary_write_lock()
2479
# Switch over to the new lock, as the old one may be closed.
2480
# TODO: jam 20070315 We should validate the disk file has
2481
# not changed contents, since temporary_write_lock may
2482
# not be an atomic operation.
2483
self._lock_token = new_lock
2484
self._state_file = new_lock.f
2485
if not grabbed_write_lock:
2486
# We couldn't grab a write lock, so we switch back to a read one
2489
lines = self.get_lines()
2490
self._state_file.seek(0)
2491
self._state_file.writelines(lines)
2492
self._state_file.truncate()
2493
self._state_file.flush()
2494
self._maybe_fdatasync()
2495
self._mark_unmodified()
2497
if grabbed_write_lock:
2498
self._lock_token = self._lock_token.restore_read_lock()
2499
self._state_file = self._lock_token.f
2295
2500
# TODO: jam 20070315 We should validate the disk file has
2296
# not changed contents. Since temporary_write_lock may
2297
# not be an atomic operation.
2298
self._lock_token = new_lock
2299
self._state_file = new_lock.f
2300
if not grabbed_write_lock:
2301
# We couldn't grab a write lock, so we switch back to a read one
2304
self._state_file.seek(0)
2305
self._state_file.writelines(self.get_lines())
2306
self._state_file.truncate()
2307
self._state_file.flush()
2308
self._header_state = DirState.IN_MEMORY_UNMODIFIED
2309
self._dirblock_state = DirState.IN_MEMORY_UNMODIFIED
2311
if grabbed_write_lock:
2312
self._lock_token = self._lock_token.restore_read_lock()
2313
self._state_file = self._lock_token.f
2314
# TODO: jam 20070315 We should validate the disk file has
2315
# not changed contents. Since restore_read_lock may
2316
# not be an atomic operation.
2501
# not changed contents. Since restore_read_lock may
2502
# not be an atomic operation.
2504
def _maybe_fdatasync(self):
2505
"""Flush to disk if possible and if not configured off."""
2506
if self._config_stack.get('dirstate.fdatasync'):
2507
osutils.fdatasync(self._state_file.fileno())
2509
def _worth_saving(self):
2510
"""Is it worth saving the dirstate or not?"""
2511
if (self._header_state == DirState.IN_MEMORY_MODIFIED
2512
or self._dirblock_state == DirState.IN_MEMORY_MODIFIED):
2514
if self._dirblock_state == DirState.IN_MEMORY_HASH_MODIFIED:
2515
if self._worth_saving_limit == -1:
2516
# We never save hash changes when the limit is -1
2518
# If we're using smart saving and only a small number of
2519
# entries have changed their hash, don't bother saving. John has
2520
# suggested using a heuristic here based on the size of the
2521
# changed files and/or tree. For now, we go with a configurable
2522
# number of changes, keeping the calculation time
2523
# as low overhead as possible. (This also keeps all existing
2524
# tests passing as the default is 0, i.e. always save.)
2525
if len(self._known_hash_changes) >= self._worth_saving_limit:
2318
2529
def _set_data(self, parent_ids, dirblocks):
2319
2530
"""Set the full dirstate data in memory.
2465
2695
new_details = []
2466
2696
for lookup_index in xrange(tree_index):
2467
2697
# boundary case: this is the first occurence of file_id
2468
# so there are no id_indexs, possibly take this out of
2698
# so there are no id_indexes, possibly take this out of
2470
if not len(id_index[file_id]):
2700
if not len(entry_keys):
2471
2701
new_details.append(DirState.NULL_PARENT_DETAILS)
2473
2703
# grab any one entry, use it to find the right path.
2474
# TODO: optimise this to reduce memory use in highly
2475
# fragmented situations by reusing the relocation
2477
a_key = iter(id_index[file_id]).next()
2704
a_key = iter(entry_keys).next()
2478
2705
if by_path[a_key][lookup_index][0] in ('r', 'a'):
2479
# its a pointer or missing statement, use it as is.
2706
# its a pointer or missing statement, use it as
2480
2708
new_details.append(by_path[a_key][lookup_index])
2482
2710
# we have the right key, make a pointer to it.
2483
2711
real_path = ('/'.join(a_key[0:2])).strip('/')
2484
new_details.append(('r', real_path, 0, False, ''))
2712
new_details.append(st('r', real_path, 0, False,
2485
2714
new_details.append(self._inv_entry_to_details(entry))
2486
2715
new_details.extend(new_location_suffix)
2487
2716
by_path[new_entry_key] = new_details
2488
id_index[file_id].add(new_entry_key)
2717
self._add_to_id_index(id_index, new_entry_key)
2489
2718
# --- end generation of full tree mappings
2491
2720
# sort and output all the entries
added
removed
bzrlib/dirstate.py
