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
249
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
252
class SHA1Provider(object):
268
253
"""An interface for getting sha1s of a file."""
411
401
self._last_block_index = None
412
402
self._last_entry_index = None
403
# The set of known hash changes
404
self._known_hash_changes = set()
405
# How many hash changed entries can we have without saving
406
self._worth_saving_limit = worth_saving_limit
407
self._config_stack = config.LocationStack(urlutils.local_path_to_url(
414
410
def __repr__(self):
415
411
return "%s(%r)" % \
416
412
(self.__class__.__name__, self._filename)
414
def _mark_modified(self, hash_changed_entries=None, header_modified=False):
415
"""Mark this dirstate as modified.
417
:param hash_changed_entries: if non-None, mark just these entries as
418
having their hash modified.
419
:param header_modified: mark the header modified as well, not just the
422
#trace.mutter_callsite(3, "modified hash entries: %s", hash_changed_entries)
423
if hash_changed_entries:
424
self._known_hash_changes.update([e[0] for e in hash_changed_entries])
425
if self._dirblock_state in (DirState.NOT_IN_MEMORY,
426
DirState.IN_MEMORY_UNMODIFIED):
427
# If the dirstate is already marked a IN_MEMORY_MODIFIED, then
428
# that takes precedence.
429
self._dirblock_state = DirState.IN_MEMORY_HASH_MODIFIED
431
# TODO: Since we now have a IN_MEMORY_HASH_MODIFIED state, we
432
# should fail noisily if someone tries to set
433
# IN_MEMORY_MODIFIED but we don't have a write-lock!
434
# We don't know exactly what changed so disable smart saving
435
self._dirblock_state = DirState.IN_MEMORY_MODIFIED
437
self._header_state = DirState.IN_MEMORY_MODIFIED
439
def _mark_unmodified(self):
440
"""Mark this dirstate as unmodified."""
441
self._header_state = DirState.IN_MEMORY_UNMODIFIED
442
self._dirblock_state = DirState.IN_MEMORY_UNMODIFIED
443
self._known_hash_changes = set()
418
445
def add(self, path, file_id, kind, stat, fingerprint):
419
446
"""Add a path to be tracked.
1483
1508
if basename_utf8:
1484
1509
parents.add((dirname_utf8, inv_entry.parent_id))
1485
1510
if old_path is None:
1486
adds.append((None, encode(new_path), file_id,
1511
old_path_utf8 = None
1513
old_path_utf8 = encode(old_path)
1514
if old_path is None:
1515
adds.append((None, new_path_utf8, file_id,
1487
1516
inv_to_entry(inv_entry), True))
1488
1517
new_ids.add(file_id)
1489
1518
elif new_path is None:
1490
deletes.append((encode(old_path), None, file_id, None, True))
1491
elif (old_path, new_path) != root_only:
1519
deletes.append((old_path_utf8, None, file_id, None, True))
1520
elif (old_path, new_path) == root_only:
1521
# change things in-place
1522
# Note: the case of a parent directory changing its file_id
1523
# tends to break optimizations here, because officially
1524
# the file has actually been moved, it just happens to
1525
# end up at the same path. If we can figure out how to
1526
# handle that case, we can avoid a lot of add+delete
1527
# pairs for objects that stay put.
1528
# elif old_path == new_path:
1529
changes.append((old_path_utf8, new_path_utf8, file_id,
1530
inv_to_entry(inv_entry)))
1493
1533
# Because renames must preserve their children we must have
1494
1534
# processed all relocations and removes before hand. The sort
1504
1544
self._update_basis_apply_deletes(deletes)
1506
1546
# Split into an add/delete pair recursively.
1507
adds.append((None, new_path_utf8, file_id,
1508
inv_to_entry(inv_entry), False))
1547
adds.append((old_path_utf8, new_path_utf8, file_id,
1548
inv_to_entry(inv_entry), False))
1509
1549
# Expunge deletes that we've seen so that deleted/renamed
1510
1550
# children of a rename directory are handled correctly.
1511
new_deletes = reversed(list(self._iter_child_entries(1,
1551
new_deletes = reversed(list(
1552
self._iter_child_entries(1, old_path_utf8)))
1513
1553
# Remove the current contents of the tree at orig_path, and
1514
1554
# reinsert at the correct new path.
1515
1555
for entry in new_deletes:
1517
source_path = entry[0][0] + '/' + entry[0][1]
1556
child_dirname, child_basename, child_file_id = entry[0]
1558
source_path = child_dirname + '/' + child_basename
1519
source_path = entry[0][1]
1560
source_path = child_basename
1520
1561
if new_path_utf8:
1521
1562
target_path = new_path_utf8 + source_path[len(old_path):]
1523
1564
if old_path == '':
1524
1565
raise AssertionError("cannot rename directory to"
1526
1567
target_path = source_path[len(old_path) + 1:]
1527
1568
adds.append((None, target_path, entry[0][2], entry[1][1], False))
1528
1569
deletes.append(
1529
1570
(source_path, target_path, entry[0][2], None, False))
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)))
1571
deletes.append((old_path_utf8, new_path, file_id, None, False))
1537
1572
self._check_delta_ids_absent(new_ids, delta, 1)
1539
1574
# Finish expunging deletes/first half of renames.
1597
1631
# Adds are accumulated partly from renames, so can be in any input
1598
1632
# order - sort it.
1633
# TODO: we may want to sort in dirblocks order. That way each entry
1634
# will end up in the same directory, allowing the _get_entry
1635
# fast-path for looking up 2 items in the same dir work.
1636
adds.sort(key=lambda x: x[1])
1600
1637
# adds is now in lexographic order, which places all parents before
1601
1638
# their children, so we can process it linearly.
1640
st = static_tuple.StaticTuple
1603
1641
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
1642
dirname, basename = osutils.split(new_path)
1643
entry_key = st(dirname, basename, file_id)
1644
block_index, present = self._find_block_index_from_key(entry_key)
1646
self._raise_invalid(new_path, file_id,
1647
"Unable to find block for this record."
1648
" Was the parent added?")
1649
block = self._dirblocks[block_index][1]
1650
entry_index, present = self._find_entry_index(entry_key, block)
1652
if old_path is not None:
1653
self._raise_invalid(new_path, file_id,
1654
'considered a real add but still had old_path at %s'
1657
entry = block[entry_index]
1658
basis_kind = entry[1][1][0]
1659
if basis_kind == 'a':
1660
entry[1][1] = new_details
1661
elif basis_kind == 'r':
1662
raise NotImplementedError()
1664
self._raise_invalid(new_path, file_id,
1665
"An entry was marked as a new add"
1666
" but the basis target already existed")
1668
# The exact key was not found in the block. However, we need to
1669
# check if there is a key next to us that would have matched.
1670
# We only need to check 2 locations, because there are only 2
1672
for maybe_index in range(entry_index-1, entry_index+1):
1673
if maybe_index < 0 or maybe_index >= len(block):
1675
maybe_entry = block[maybe_index]
1676
if maybe_entry[0][:2] != (dirname, basename):
1677
# Just a random neighbor
1679
if maybe_entry[0][2] == file_id:
1680
raise AssertionError(
1681
'_find_entry_index didnt find a key match'
1682
' but walking the data did, for %s'
1684
basis_kind = maybe_entry[1][1][0]
1685
if basis_kind not in 'ar':
1686
self._raise_invalid(new_path, file_id,
1687
"we have an add record for path, but the path"
1688
" is already present with another file_id %s"
1689
% (maybe_entry[0][2],))
1691
entry = (entry_key, [DirState.NULL_PARENT_DETAILS,
1693
block.insert(entry_index, entry)
1695
active_kind = entry[1][0][0]
1696
if active_kind == 'a':
1697
# The active record shows up as absent, this could be genuine,
1698
# or it could be present at some other location. We need to
1700
id_index = self._get_id_index()
1701
# The id_index may not be perfectly accurate for tree1, because
1702
# we haven't been keeping it updated. However, it should be
1703
# fine for tree0, and that gives us enough info for what we
1705
keys = id_index.get(file_id, ())
1707
block_i, entry_i, d_present, f_present = \
1708
self._get_block_entry_index(key[0], key[1], 0)
1711
active_entry = self._dirblocks[block_i][1][entry_i]
1712
if (active_entry[0][2] != file_id):
1713
# Some other file is at this path, we don't need to
1716
real_active_kind = active_entry[1][0][0]
1717
if real_active_kind in 'ar':
1718
# We found a record, which was not *this* record,
1719
# which matches the file_id, but is not actually
1720
# present. Something seems *really* wrong.
1721
self._raise_invalid(new_path, file_id,
1722
"We found a tree0 entry that doesnt make sense")
1723
# Now, we've found a tree0 entry which matches the file_id
1724
# but is at a different location. So update them to be
1726
active_dir, active_name = active_entry[0][:2]
1728
active_path = active_dir + '/' + active_name
1730
active_path = active_name
1731
active_entry[1][1] = st('r', new_path, 0, False, '')
1732
entry[1][0] = st('r', active_path, 0, False, '')
1733
elif active_kind == 'r':
1734
raise NotImplementedError()
1736
new_kind = new_details[0]
1738
self._ensure_block(block_index, entry_index, new_path)
1620
1740
def _update_basis_apply_changes(self, changes):
1621
1741
"""Apply a sequence of changes to tree 1 during update_basis_by_delta.
1653
1767
null = DirState.NULL_PARENT_DETAILS
1654
1768
for old_path, new_path, file_id, _, real_delete in deletes:
1655
1769
if real_delete != (new_path is None):
1656
self._changes_aborted = True
1657
raise AssertionError("bad delete delta")
1770
self._raise_invalid(old_path, file_id, "bad delete delta")
1658
1771
# the entry for this file_id must be in tree 1.
1659
1772
dirname, basename = osutils.split(old_path)
1660
1773
block_index, entry_index, dir_present, file_present = \
1661
1774
self._get_block_entry_index(dirname, basename, 1)
1662
1775
if not file_present:
1663
self._changes_aborted = True
1664
raise errors.InconsistentDelta(old_path, file_id,
1776
self._raise_invalid(old_path, file_id,
1665
1777
'basis tree does not contain removed entry')
1666
1778
entry = self._dirblocks[block_index][1][entry_index]
1779
# The state of the entry in the 'active' WT
1780
active_kind = entry[1][0][0]
1667
1781
if entry[0][2] != file_id:
1668
self._changes_aborted = True
1669
raise errors.InconsistentDelta(old_path, file_id,
1782
self._raise_invalid(old_path, file_id,
1670
1783
'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.')
1785
old_kind = entry[1][1][0]
1786
if active_kind in 'ar':
1787
# The active tree doesn't have this file_id.
1788
# The basis tree is changing this record. If this is a
1789
# rename, then we don't want the record here at all
1790
# anymore. If it is just an in-place change, we want the
1791
# record here, but we'll add it if we need to. So we just
1793
if active_kind == 'r':
1794
active_path = entry[1][0][1]
1795
active_entry = self._get_entry(0, file_id, active_path)
1796
if active_entry[1][1][0] != 'r':
1797
self._raise_invalid(old_path, file_id,
1798
"Dirstate did not have matching rename entries")
1799
elif active_entry[1][0][0] in 'ar':
1800
self._raise_invalid(old_path, file_id,
1801
"Dirstate had a rename pointing at an inactive"
1803
active_entry[1][1] = null
1677
1804
del self._dirblocks[block_index][1][entry_index]
1806
# This was a directory, and the active tree says it
1807
# doesn't exist, and now the basis tree says it doesn't
1808
# exist. Remove its dirblock if present
1810
present) = self._find_block_index_from_key(
1813
dir_block = self._dirblocks[dir_block_index][1]
1815
# This entry is empty, go ahead and just remove it
1816
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
1818
# There is still an active record, so just mark this
1821
block_i, entry_i, d_present, f_present = \
1822
self._get_block_entry_index(old_path, '', 1)
1824
dir_block = self._dirblocks[block_i][1]
1825
for child_entry in dir_block:
1826
child_basis_kind = child_entry[1][1][0]
1827
if child_basis_kind not in 'ar':
1828
self._raise_invalid(old_path, file_id,
1829
"The file id was deleted but its children were "
1695
1832
def _after_delta_check_parents(self, parents, index):
1696
1833
"""Check that parents required by the delta are all intact.
2145
2284
def _get_id_index(self):
2146
"""Get an id index of self._dirblocks."""
2285
"""Get an id index of self._dirblocks.
2287
This maps from file_id => [(directory, name, file_id)] entries where
2288
that file_id appears in one of the trees.
2147
2290
if self._id_index is None:
2149
2292
for key, tree_details in self._iter_entries():
2150
id_index.setdefault(key[2], set()).add(key)
2293
self._add_to_id_index(id_index, key)
2151
2294
self._id_index = id_index
2152
2295
return self._id_index
2297
def _add_to_id_index(self, id_index, entry_key):
2298
"""Add this entry to the _id_index mapping."""
2299
# This code used to use a set for every entry in the id_index. However,
2300
# it is *rare* to have more than one entry. So a set is a large
2301
# overkill. And even when we do, we won't ever have more than the
2302
# number of parent trees. Which is still a small number (rarely >2). As
2303
# such, we use a simple tuple, and do our own uniqueness checks. While
2304
# the 'in' check is O(N) since N is nicely bounded it shouldn't ever
2305
# cause quadratic failure.
2306
file_id = entry_key[2]
2307
entry_key = static_tuple.StaticTuple.from_sequence(entry_key)
2308
if file_id not in id_index:
2309
id_index[file_id] = static_tuple.StaticTuple(entry_key,)
2311
entry_keys = id_index[file_id]
2312
if entry_key not in entry_keys:
2313
id_index[file_id] = entry_keys + (entry_key,)
2315
def _remove_from_id_index(self, id_index, entry_key):
2316
"""Remove this entry from the _id_index mapping.
2318
It is an programming error to call this when the entry_key is not
2321
file_id = entry_key[2]
2322
entry_keys = list(id_index[file_id])
2323
entry_keys.remove(entry_key)
2324
id_index[file_id] = static_tuple.StaticTuple.from_sequence(entry_keys)
2154
2326
def _get_output_lines(self, lines):
2155
2327
"""Format lines for final output.
2285
2461
trace.mutter('Not saving DirState because '
2286
2462
'_changes_aborted is set.')
2288
if (self._header_state == DirState.IN_MEMORY_MODIFIED or
2289
self._dirblock_state == DirState.IN_MEMORY_MODIFIED):
2464
# TODO: Since we now distinguish IN_MEMORY_MODIFIED from
2465
# IN_MEMORY_HASH_MODIFIED, we should only fail quietly if we fail
2466
# to save an IN_MEMORY_HASH_MODIFIED, and fail *noisily* if we
2467
# fail to save IN_MEMORY_MODIFIED
2468
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.
2471
grabbed_write_lock = False
2472
if self._lock_state != 'w':
2473
grabbed_write_lock, new_lock = self._lock_token.temporary_write_lock()
2474
# Switch over to the new lock, as the old one may be closed.
2475
# TODO: jam 20070315 We should validate the disk file has
2476
# not changed contents, since temporary_write_lock may
2477
# not be an atomic operation.
2478
self._lock_token = new_lock
2479
self._state_file = new_lock.f
2480
if not grabbed_write_lock:
2481
# We couldn't grab a write lock, so we switch back to a read one
2484
lines = self.get_lines()
2485
self._state_file.seek(0)
2486
self._state_file.writelines(lines)
2487
self._state_file.truncate()
2488
self._state_file.flush()
2489
self._maybe_fdatasync()
2490
self._mark_unmodified()
2492
if grabbed_write_lock:
2493
self._lock_token = self._lock_token.restore_read_lock()
2494
self._state_file = self._lock_token.f
2295
2495
# 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.
2496
# not changed contents. Since restore_read_lock may
2497
# not be an atomic operation.
2499
def _maybe_fdatasync(self):
2500
"""Flush to disk if possible and if not configured off."""
2501
if self._config_stack.get('dirstate.fdatasync'):
2502
osutils.fdatasync(self._state_file.fileno())
2504
def _worth_saving(self):
2505
"""Is it worth saving the dirstate or not?"""
2506
if (self._header_state == DirState.IN_MEMORY_MODIFIED
2507
or self._dirblock_state == DirState.IN_MEMORY_MODIFIED):
2509
if self._dirblock_state == DirState.IN_MEMORY_HASH_MODIFIED:
2510
if self._worth_saving_limit == -1:
2511
# We never save hash changes when the limit is -1
2513
# If we're using smart saving and only a small number of
2514
# entries have changed their hash, don't bother saving. John has
2515
# suggested using a heuristic here based on the size of the
2516
# changed files and/or tree. For now, we go with a configurable
2517
# number of changes, keeping the calculation time
2518
# as low overhead as possible. (This also keeps all existing
2519
# tests passing as the default is 0, i.e. always save.)
2520
if len(self._known_hash_changes) >= self._worth_saving_limit:
2318
2524
def _set_data(self, parent_ids, dirblocks):
2319
2525
"""Set the full dirstate data in memory.
2465
2690
new_details = []
2466
2691
for lookup_index in xrange(tree_index):
2467
2692
# boundary case: this is the first occurence of file_id
2468
# so there are no id_indexs, possibly take this out of
2693
# so there are no id_indexes, possibly take this out of
2470
if not len(id_index[file_id]):
2695
if not len(entry_keys):
2471
2696
new_details.append(DirState.NULL_PARENT_DETAILS)
2473
2698
# 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()
2699
a_key = iter(entry_keys).next()
2478
2700
if by_path[a_key][lookup_index][0] in ('r', 'a'):
2479
# its a pointer or missing statement, use it as is.
2701
# its a pointer or missing statement, use it as
2480
2703
new_details.append(by_path[a_key][lookup_index])
2482
2705
# we have the right key, make a pointer to it.
2483
2706
real_path = ('/'.join(a_key[0:2])).strip('/')
2484
new_details.append(('r', real_path, 0, False, ''))
2707
new_details.append(st('r', real_path, 0, False,
2485
2709
new_details.append(self._inv_entry_to_details(entry))
2486
2710
new_details.extend(new_location_suffix)
2487
2711
by_path[new_entry_key] = new_details
2488
id_index[file_id].add(new_entry_key)
2712
self._add_to_id_index(id_index, new_entry_key)
2489
2713
# --- end generation of full tree mappings
2491
2715
# sort and output all the entries
added
removed
bzrlib/dirstate.py
