|
|
# parsers.py - Python implementation of parsers.c
|
|
|
#
|
|
|
# Copyright 2009 Olivia Mackall <olivia@selenic.com> and others
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
|
|
|
from __future__ import absolute_import
|
|
|
|
|
|
import struct
|
|
|
import zlib
|
|
|
|
|
|
from ..node import (
|
|
|
nullrev,
|
|
|
sha1nodeconstants,
|
|
|
)
|
|
|
from .. import (
|
|
|
error,
|
|
|
pycompat,
|
|
|
util,
|
|
|
)
|
|
|
|
|
|
from ..revlogutils import nodemap as nodemaputil
|
|
|
from ..revlogutils import constants as revlog_constants
|
|
|
|
|
|
stringio = pycompat.bytesio
|
|
|
|
|
|
|
|
|
_pack = struct.pack
|
|
|
_unpack = struct.unpack
|
|
|
_compress = zlib.compress
|
|
|
_decompress = zlib.decompress
|
|
|
|
|
|
# Some code below makes tuples directly because it's more convenient. However,
|
|
|
# code outside this module should always use dirstatetuple.
|
|
|
def dirstatetuple(*x):
|
|
|
# x is a tuple
|
|
|
return x
|
|
|
|
|
|
|
|
|
def gettype(q):
|
|
|
return int(q & 0xFFFF)
|
|
|
|
|
|
|
|
|
def offset_type(offset, type):
|
|
|
return int(int(offset) << 16 | type)
|
|
|
|
|
|
|
|
|
class BaseIndexObject(object):
|
|
|
# Can I be passed to an algorithme implemented in Rust ?
|
|
|
rust_ext_compat = 0
|
|
|
# Format of an index entry according to Python's `struct` language
|
|
|
index_format = revlog_constants.INDEX_ENTRY_V1
|
|
|
# Size of a C unsigned long long int, platform independent
|
|
|
big_int_size = struct.calcsize(b'>Q')
|
|
|
# Size of a C long int, platform independent
|
|
|
int_size = struct.calcsize(b'>i')
|
|
|
# An empty index entry, used as a default value to be overridden, or nullrev
|
|
|
null_item = (
|
|
|
0,
|
|
|
0,
|
|
|
0,
|
|
|
-1,
|
|
|
-1,
|
|
|
-1,
|
|
|
-1,
|
|
|
sha1nodeconstants.nullid,
|
|
|
0,
|
|
|
0,
|
|
|
revlog_constants.COMP_MODE_INLINE,
|
|
|
revlog_constants.COMP_MODE_INLINE,
|
|
|
)
|
|
|
|
|
|
@util.propertycache
|
|
|
def entry_size(self):
|
|
|
return self.index_format.size
|
|
|
|
|
|
@property
|
|
|
def nodemap(self):
|
|
|
msg = b"index.nodemap is deprecated, use index.[has_node|rev|get_rev]"
|
|
|
util.nouideprecwarn(msg, b'5.3', stacklevel=2)
|
|
|
return self._nodemap
|
|
|
|
|
|
@util.propertycache
|
|
|
def _nodemap(self):
|
|
|
nodemap = nodemaputil.NodeMap({sha1nodeconstants.nullid: nullrev})
|
|
|
for r in range(0, len(self)):
|
|
|
n = self[r][7]
|
|
|
nodemap[n] = r
|
|
|
return nodemap
|
|
|
|
|
|
def has_node(self, node):
|
|
|
"""return True if the node exist in the index"""
|
|
|
return node in self._nodemap
|
|
|
|
|
|
def rev(self, node):
|
|
|
"""return a revision for a node
|
|
|
|
|
|
If the node is unknown, raise a RevlogError"""
|
|
|
return self._nodemap[node]
|
|
|
|
|
|
def get_rev(self, node):
|
|
|
"""return a revision for a node
|
|
|
|
|
|
If the node is unknown, return None"""
|
|
|
return self._nodemap.get(node)
|
|
|
|
|
|
def _stripnodes(self, start):
|
|
|
if '_nodemap' in vars(self):
|
|
|
for r in range(start, len(self)):
|
|
|
n = self[r][7]
|
|
|
del self._nodemap[n]
|
|
|
|
|
|
def clearcaches(self):
|
|
|
self.__dict__.pop('_nodemap', None)
|
|
|
|
|
|
def __len__(self):
|
|
|
return self._lgt + len(self._extra)
|
|
|
|
|
|
def append(self, tup):
|
|
|
if '_nodemap' in vars(self):
|
|
|
self._nodemap[tup[7]] = len(self)
|
|
|
data = self._pack_entry(len(self), tup)
|
|
|
self._extra.append(data)
|
|
|
|
|
|
def _pack_entry(self, rev, entry):
|
|
|
assert entry[8] == 0
|
|
|
assert entry[9] == 0
|
|
|
return self.index_format.pack(*entry[:8])
|
|
|
|
|
|
def _check_index(self, i):
|
|
|
if not isinstance(i, int):
|
|
|
raise TypeError(b"expecting int indexes")
|
|
|
if i < 0 or i >= len(self):
|
|
|
raise IndexError
|
|
|
|
|
|
def __getitem__(self, i):
|
|
|
if i == -1:
|
|
|
return self.null_item
|
|
|
self._check_index(i)
|
|
|
if i >= self._lgt:
|
|
|
data = self._extra[i - self._lgt]
|
|
|
else:
|
|
|
index = self._calculate_index(i)
|
|
|
data = self._data[index : index + self.entry_size]
|
|
|
r = self._unpack_entry(i, data)
|
|
|
if self._lgt and i == 0:
|
|
|
r = (offset_type(0, gettype(r[0])),) + r[1:]
|
|
|
return r
|
|
|
|
|
|
def _unpack_entry(self, rev, data):
|
|
|
r = self.index_format.unpack(data)
|
|
|
r = r + (
|
|
|
0,
|
|
|
0,
|
|
|
revlog_constants.COMP_MODE_INLINE,
|
|
|
revlog_constants.COMP_MODE_INLINE,
|
|
|
)
|
|
|
return r
|
|
|
|
|
|
def pack_header(self, header):
|
|
|
"""pack header information as binary"""
|
|
|
v_fmt = revlog_constants.INDEX_HEADER
|
|
|
return v_fmt.pack(header)
|
|
|
|
|
|
def entry_binary(self, rev):
|
|
|
"""return the raw binary string representing a revision"""
|
|
|
entry = self[rev]
|
|
|
p = revlog_constants.INDEX_ENTRY_V1.pack(*entry[:8])
|
|
|
if rev == 0:
|
|
|
p = p[revlog_constants.INDEX_HEADER.size :]
|
|
|
return p
|
|
|
|
|
|
|
|
|
class IndexObject(BaseIndexObject):
|
|
|
def __init__(self, data):
|
|
|
assert len(data) % self.entry_size == 0, (
|
|
|
len(data),
|
|
|
self.entry_size,
|
|
|
len(data) % self.entry_size,
|
|
|
)
|
|
|
self._data = data
|
|
|
self._lgt = len(data) // self.entry_size
|
|
|
self._extra = []
|
|
|
|
|
|
def _calculate_index(self, i):
|
|
|
return i * self.entry_size
|
|
|
|
|
|
def __delitem__(self, i):
|
|
|
if not isinstance(i, slice) or not i.stop == -1 or i.step is not None:
|
|
|
raise ValueError(b"deleting slices only supports a:-1 with step 1")
|
|
|
i = i.start
|
|
|
self._check_index(i)
|
|
|
self._stripnodes(i)
|
|
|
if i < self._lgt:
|
|
|
self._data = self._data[: i * self.entry_size]
|
|
|
self._lgt = i
|
|
|
self._extra = []
|
|
|
else:
|
|
|
self._extra = self._extra[: i - self._lgt]
|
|
|
|
|
|
|
|
|
class PersistentNodeMapIndexObject(IndexObject):
|
|
|
"""a Debug oriented class to test persistent nodemap
|
|
|
|
|
|
We need a simple python object to test API and higher level behavior. See
|
|
|
the Rust implementation for more serious usage. This should be used only
|
|
|
through the dedicated `devel.persistent-nodemap` config.
|
|
|
"""
|
|
|
|
|
|
def nodemap_data_all(self):
|
|
|
"""Return bytes containing a full serialization of a nodemap
|
|
|
|
|
|
The nodemap should be valid for the full set of revisions in the
|
|
|
index."""
|
|
|
return nodemaputil.persistent_data(self)
|
|
|
|
|
|
def nodemap_data_incremental(self):
|
|
|
"""Return bytes containing a incremental update to persistent nodemap
|
|
|
|
|
|
This containst the data for an append-only update of the data provided
|
|
|
in the last call to `update_nodemap_data`.
|
|
|
"""
|
|
|
if self._nm_root is None:
|
|
|
return None
|
|
|
docket = self._nm_docket
|
|
|
changed, data = nodemaputil.update_persistent_data(
|
|
|
self, self._nm_root, self._nm_max_idx, self._nm_docket.tip_rev
|
|
|
)
|
|
|
|
|
|
self._nm_root = self._nm_max_idx = self._nm_docket = None
|
|
|
return docket, changed, data
|
|
|
|
|
|
def update_nodemap_data(self, docket, nm_data):
|
|
|
"""provide full block of persisted binary data for a nodemap
|
|
|
|
|
|
The data are expected to come from disk. See `nodemap_data_all` for a
|
|
|
produceur of such data."""
|
|
|
if nm_data is not None:
|
|
|
self._nm_root, self._nm_max_idx = nodemaputil.parse_data(nm_data)
|
|
|
if self._nm_root:
|
|
|
self._nm_docket = docket
|
|
|
else:
|
|
|
self._nm_root = self._nm_max_idx = self._nm_docket = None
|
|
|
|
|
|
|
|
|
class InlinedIndexObject(BaseIndexObject):
|
|
|
def __init__(self, data, inline=0):
|
|
|
self._data = data
|
|
|
self._lgt = self._inline_scan(None)
|
|
|
self._inline_scan(self._lgt)
|
|
|
self._extra = []
|
|
|
|
|
|
def _inline_scan(self, lgt):
|
|
|
off = 0
|
|
|
if lgt is not None:
|
|
|
self._offsets = [0] * lgt
|
|
|
count = 0
|
|
|
while off <= len(self._data) - self.entry_size:
|
|
|
start = off + self.big_int_size
|
|
|
(s,) = struct.unpack(
|
|
|
b'>i',
|
|
|
self._data[start : start + self.int_size],
|
|
|
)
|
|
|
if lgt is not None:
|
|
|
self._offsets[count] = off
|
|
|
count += 1
|
|
|
off += self.entry_size + s
|
|
|
if off != len(self._data):
|
|
|
raise ValueError(b"corrupted data")
|
|
|
return count
|
|
|
|
|
|
def __delitem__(self, i):
|
|
|
if not isinstance(i, slice) or not i.stop == -1 or i.step is not None:
|
|
|
raise ValueError(b"deleting slices only supports a:-1 with step 1")
|
|
|
i = i.start
|
|
|
self._check_index(i)
|
|
|
self._stripnodes(i)
|
|
|
if i < self._lgt:
|
|
|
self._offsets = self._offsets[:i]
|
|
|
self._lgt = i
|
|
|
self._extra = []
|
|
|
else:
|
|
|
self._extra = self._extra[: i - self._lgt]
|
|
|
|
|
|
def _calculate_index(self, i):
|
|
|
return self._offsets[i]
|
|
|
|
|
|
|
|
|
def parse_index2(data, inline, revlogv2=False):
|
|
|
if not inline:
|
|
|
cls = IndexObject2 if revlogv2 else IndexObject
|
|
|
return cls(data), None
|
|
|
cls = InlinedIndexObject
|
|
|
return cls(data, inline), (0, data)
|
|
|
|
|
|
|
|
|
def parse_index_cl_v2(data):
|
|
|
return IndexChangelogV2(data), None
|
|
|
|
|
|
|
|
|
class IndexObject2(IndexObject):
|
|
|
index_format = revlog_constants.INDEX_ENTRY_V2
|
|
|
|
|
|
def replace_sidedata_info(
|
|
|
self,
|
|
|
rev,
|
|
|
sidedata_offset,
|
|
|
sidedata_length,
|
|
|
offset_flags,
|
|
|
compression_mode,
|
|
|
):
|
|
|
"""
|
|
|
Replace an existing index entry's sidedata offset and length with new
|
|
|
ones.
|
|
|
This cannot be used outside of the context of sidedata rewriting,
|
|
|
inside the transaction that creates the revision `rev`.
|
|
|
"""
|
|
|
if rev < 0:
|
|
|
raise KeyError
|
|
|
self._check_index(rev)
|
|
|
if rev < self._lgt:
|
|
|
msg = b"cannot rewrite entries outside of this transaction"
|
|
|
raise KeyError(msg)
|
|
|
else:
|
|
|
entry = list(self[rev])
|
|
|
entry[0] = offset_flags
|
|
|
entry[8] = sidedata_offset
|
|
|
entry[9] = sidedata_length
|
|
|
entry[11] = compression_mode
|
|
|
entry = tuple(entry)
|
|
|
new = self._pack_entry(rev, entry)
|
|
|
self._extra[rev - self._lgt] = new
|
|
|
|
|
|
def _unpack_entry(self, rev, data):
|
|
|
data = self.index_format.unpack(data)
|
|
|
entry = data[:10]
|
|
|
data_comp = data[10] & 3
|
|
|
sidedata_comp = (data[10] & (3 << 2)) >> 2
|
|
|
return entry + (data_comp, sidedata_comp)
|
|
|
|
|
|
def _pack_entry(self, rev, entry):
|
|
|
data = entry[:10]
|
|
|
data_comp = entry[10] & 3
|
|
|
sidedata_comp = (entry[11] & 3) << 2
|
|
|
data += (data_comp | sidedata_comp,)
|
|
|
|
|
|
return self.index_format.pack(*data)
|
|
|
|
|
|
def entry_binary(self, rev):
|
|
|
"""return the raw binary string representing a revision"""
|
|
|
entry = self[rev]
|
|
|
return self._pack_entry(rev, entry)
|
|
|
|
|
|
def pack_header(self, header):
|
|
|
"""pack header information as binary"""
|
|
|
msg = 'version header should go in the docket, not the index: %d'
|
|
|
msg %= header
|
|
|
raise error.ProgrammingError(msg)
|
|
|
|
|
|
|
|
|
class IndexChangelogV2(IndexObject2):
|
|
|
index_format = revlog_constants.INDEX_ENTRY_CL_V2
|
|
|
|
|
|
def _unpack_entry(self, rev, data, r=True):
|
|
|
items = self.index_format.unpack(data)
|
|
|
entry = items[:3] + (rev, rev) + items[3:8]
|
|
|
data_comp = items[8] & 3
|
|
|
sidedata_comp = (items[8] >> 2) & 3
|
|
|
return entry + (data_comp, sidedata_comp)
|
|
|
|
|
|
def _pack_entry(self, rev, entry):
|
|
|
assert entry[3] == rev, entry[3]
|
|
|
assert entry[4] == rev, entry[4]
|
|
|
data = entry[:3] + entry[5:10]
|
|
|
data_comp = entry[10] & 3
|
|
|
sidedata_comp = (entry[11] & 3) << 2
|
|
|
data += (data_comp | sidedata_comp,)
|
|
|
return self.index_format.pack(*data)
|
|
|
|
|
|
|
|
|
def parse_index_devel_nodemap(data, inline):
|
|
|
"""like parse_index2, but alway return a PersistentNodeMapIndexObject"""
|
|
|
return PersistentNodeMapIndexObject(data), None
|
|
|
|
|
|
|
|
|
def parse_dirstate(dmap, copymap, st):
|
|
|
parents = [st[:20], st[20:40]]
|
|
|
# dereference fields so they will be local in loop
|
|
|
format = b">cllll"
|
|
|
e_size = struct.calcsize(format)
|
|
|
pos1 = 40
|
|
|
l = len(st)
|
|
|
|
|
|
# the inner loop
|
|
|
while pos1 < l:
|
|
|
pos2 = pos1 + e_size
|
|
|
e = _unpack(b">cllll", st[pos1:pos2]) # a literal here is faster
|
|
|
pos1 = pos2 + e[4]
|
|
|
f = st[pos2:pos1]
|
|
|
if b'\0' in f:
|
|
|
f, c = f.split(b'\0')
|
|
|
copymap[f] = c
|
|
|
dmap[f] = e[:4]
|
|
|
return parents
|
|
|
|
|
|
|
|
|
def pack_dirstate(dmap, copymap, pl, now):
|
|
|
now = int(now)
|
|
|
cs = stringio()
|
|
|
write = cs.write
|
|
|
write(b"".join(pl))
|
|
|
for f, e in pycompat.iteritems(dmap):
|
|
|
if e[0] == b'n' and e[3] == now:
|
|
|
# The file was last modified "simultaneously" with the current
|
|
|
# write to dirstate (i.e. within the same second for file-
|
|
|
# systems with a granularity of 1 sec). This commonly happens
|
|
|
# for at least a couple of files on 'update'.
|
|
|
# The user could change the file without changing its size
|
|
|
# within the same second. Invalidate the file's mtime in
|
|
|
# dirstate, forcing future 'status' calls to compare the
|
|
|
# contents of the file if the size is the same. This prevents
|
|
|
# mistakenly treating such files as clean.
|
|
|
e = dirstatetuple(e[0], e[1], e[2], -1)
|
|
|
dmap[f] = e
|
|
|
|
|
|
if f in copymap:
|
|
|
f = b"%s\0%s" % (f, copymap[f])
|
|
|
e = _pack(b">cllll", e[0], e[1], e[2], e[3], len(f))
|
|
|
write(e)
|
|
|
write(f)
|
|
|
return cs.getvalue()
|
|
|
|
