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# dirstatemap.py
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import errno
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from .i18n import _
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from . import (
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error,
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pathutil,
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policy,
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pycompat,
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txnutil,
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util,
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)
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parsers = policy.importmod('parsers')
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rustmod = policy.importrust('dirstate')
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propertycache = util.propertycache
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DirstateItem = parsers.DirstateItem
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# a special value used internally for `size` if the file come from the other parent
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FROM_P2 = -2
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# a special value used internally for `size` if the file is modified/merged/added
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NONNORMAL = -1
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# a special value used internally for `time` if the time is ambigeous
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AMBIGUOUS_TIME = -1
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rangemask = 0x7FFFFFFF
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class dirstatemap(object):
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"""Map encapsulating the dirstate's contents.
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The dirstate contains the following state:
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- `identity` is the identity of the dirstate file, which can be used to
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detect when changes have occurred to the dirstate file.
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- `parents` is a pair containing the parents of the working copy. The
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parents are updated by calling `setparents`.
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- the state map maps filenames to tuples of (state, mode, size, mtime),
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where state is a single character representing 'normal', 'added',
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'removed', or 'merged'. It is read by treating the dirstate as a
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dict. File state is updated by calling the `addfile`, `removefile` and
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`dropfile` methods.
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- `copymap` maps destination filenames to their source filename.
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The dirstate also provides the following views onto the state:
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- `nonnormalset` is a set of the filenames that have state other
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than 'normal', or are normal but have an mtime of -1 ('normallookup').
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- `otherparentset` is a set of the filenames that are marked as coming
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from the second parent when the dirstate is currently being merged.
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- `filefoldmap` is a dict mapping normalized filenames to the denormalized
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form that they appear as in the dirstate.
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- `dirfoldmap` is a dict mapping normalized directory names to the
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denormalized form that they appear as in the dirstate.
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"""
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def __init__(self, ui, opener, root, nodeconstants, use_dirstate_v2):
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self._ui = ui
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self._opener = opener
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self._root = root
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self._filename = b'dirstate'
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self._nodelen = 20
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self._nodeconstants = nodeconstants
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assert (
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not use_dirstate_v2
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), "should have detected unsupported requirement"
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self._parents = None
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self._dirtyparents = False
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# for consistent view between _pl() and _read() invocations
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self._pendingmode = None
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@propertycache
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def _map(self):
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self._map = {}
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self.read()
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return self._map
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@propertycache
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def copymap(self):
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self.copymap = {}
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self._map
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return self.copymap
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def directories(self):
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# Rust / dirstate-v2 only
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return []
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def clear(self):
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self._map.clear()
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self.copymap.clear()
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self.setparents(self._nodeconstants.nullid, self._nodeconstants.nullid)
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util.clearcachedproperty(self, b"_dirs")
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util.clearcachedproperty(self, b"_alldirs")
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util.clearcachedproperty(self, b"filefoldmap")
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util.clearcachedproperty(self, b"dirfoldmap")
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util.clearcachedproperty(self, b"nonnormalset")
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util.clearcachedproperty(self, b"otherparentset")
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def items(self):
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return pycompat.iteritems(self._map)
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# forward for python2,3 compat
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iteritems = items
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def __len__(self):
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return len(self._map)
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def __iter__(self):
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return iter(self._map)
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def get(self, key, default=None):
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return self._map.get(key, default)
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def __contains__(self, key):
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return key in self._map
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def __getitem__(self, key):
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return self._map[key]
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def keys(self):
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return self._map.keys()
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def preload(self):
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"""Loads the underlying data, if it's not already loaded"""
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self._map
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def addfile(
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self,
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f,
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mode=0,
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size=None,
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mtime=None,
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added=False,
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merged=False,
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from_p2=False,
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possibly_dirty=False,
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):
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"""Add a tracked file to the dirstate."""
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if added:
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assert not merged
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assert not possibly_dirty
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assert not from_p2
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state = b'a'
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size = NONNORMAL
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mtime = AMBIGUOUS_TIME
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elif merged:
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assert not possibly_dirty
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assert not from_p2
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state = b'm'
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size = FROM_P2
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mtime = AMBIGUOUS_TIME
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elif from_p2:
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assert not possibly_dirty
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state = b'n'
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size = FROM_P2
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mtime = AMBIGUOUS_TIME
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elif possibly_dirty:
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state = b'n'
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size = NONNORMAL
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mtime = AMBIGUOUS_TIME
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else:
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assert size != FROM_P2
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assert size != NONNORMAL
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state = b'n'
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size = size & rangemask
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mtime = mtime & rangemask
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assert state is not None
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assert size is not None
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assert mtime is not None
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old_entry = self.get(f)
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if (
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old_entry is None or old_entry.removed
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) and "_dirs" in self.__dict__:
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self._dirs.addpath(f)
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if old_entry is None and "_alldirs" in self.__dict__:
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self._alldirs.addpath(f)
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self._map[f] = DirstateItem(state, mode, size, mtime)
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if state != b'n' or mtime == AMBIGUOUS_TIME:
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self.nonnormalset.add(f)
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if size == FROM_P2:
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self.otherparentset.add(f)
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def removefile(self, f, in_merge=False):
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"""
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Mark a file as removed in the dirstate.
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The `size` parameter is used to store sentinel values that indicate
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the file's previous state. In the future, we should refactor this
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to be more explicit about what that state is.
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"""
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entry = self.get(f)
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size = 0
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if in_merge:
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# XXX we should not be able to have 'm' state and 'FROM_P2' if not
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# during a merge. So I (marmoute) am not sure we need the
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# conditionnal at all. Adding double checking this with assert
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# would be nice.
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if entry is not None:
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# backup the previous state
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if entry.merged: # merge
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size = NONNORMAL
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elif entry.from_p2:
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size = FROM_P2
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self.otherparentset.add(f)
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if entry is not None and not (entry.merged or entry.from_p2):
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self.copymap.pop(f, None)
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if entry is not None and not entry.removed and "_dirs" in self.__dict__:
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self._dirs.delpath(f)
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if entry is None and "_alldirs" in self.__dict__:
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self._alldirs.addpath(f)
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if "filefoldmap" in self.__dict__:
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normed = util.normcase(f)
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self.filefoldmap.pop(normed, None)
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self._map[f] = DirstateItem(b'r', 0, size, 0)
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self.nonnormalset.add(f)
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def dropfile(self, f):
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"""
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Remove a file from the dirstate. Returns True if the file was
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previously recorded.
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"""
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old_entry = self._map.pop(f, None)
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exists = False
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oldstate = b'?'
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if old_entry is not None:
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exists = True
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oldstate = old_entry.state
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if exists:
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if oldstate != b"r" and "_dirs" in self.__dict__:
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self._dirs.delpath(f)
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if "_alldirs" in self.__dict__:
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self._alldirs.delpath(f)
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if "filefoldmap" in self.__dict__:
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normed = util.normcase(f)
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self.filefoldmap.pop(normed, None)
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self.nonnormalset.discard(f)
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return exists
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def clearambiguoustimes(self, files, now):
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for f in files:
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e = self.get(f)
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if e is not None and e.need_delay(now):
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e.set_possibly_dirty()
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self.nonnormalset.add(f)
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def nonnormalentries(self):
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'''Compute the nonnormal dirstate entries from the dmap'''
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try:
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return parsers.nonnormalotherparententries(self._map)
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except AttributeError:
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nonnorm = set()
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otherparent = set()
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for fname, e in pycompat.iteritems(self._map):
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if e.state != b'n' or e.mtime == AMBIGUOUS_TIME:
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nonnorm.add(fname)
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if e.from_p2:
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otherparent.add(fname)
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return nonnorm, otherparent
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@propertycache
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def filefoldmap(self):
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"""Returns a dictionary mapping normalized case paths to their
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non-normalized versions.
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"""
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try:
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makefilefoldmap = parsers.make_file_foldmap
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except AttributeError:
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pass
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else:
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return makefilefoldmap(
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self._map, util.normcasespec, util.normcasefallback
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)
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f = {}
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normcase = util.normcase
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for name, s in pycompat.iteritems(self._map):
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if not s.removed:
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f[normcase(name)] = name
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f[b'.'] = b'.' # prevents useless util.fspath() invocation
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return f
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def hastrackeddir(self, d):
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"""
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Returns True if the dirstate contains a tracked (not removed) file
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in this directory.
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"""
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return d in self._dirs
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def hasdir(self, d):
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"""
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Returns True if the dirstate contains a file (tracked or removed)
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in this directory.
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"""
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return d in self._alldirs
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@propertycache
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def _dirs(self):
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return pathutil.dirs(self._map, b'r')
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@propertycache
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def _alldirs(self):
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return pathutil.dirs(self._map)
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def _opendirstatefile(self):
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fp, mode = txnutil.trypending(self._root, self._opener, self._filename)
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if self._pendingmode is not None and self._pendingmode != mode:
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fp.close()
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raise error.Abort(
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_(b'working directory state may be changed parallelly')
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)
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self._pendingmode = mode
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return fp
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def parents(self):
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if not self._parents:
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try:
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fp = self._opendirstatefile()
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st = fp.read(2 * self._nodelen)
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fp.close()
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except IOError as err:
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if err.errno != errno.ENOENT:
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raise
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# File doesn't exist, so the current state is empty
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st = b''
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l = len(st)
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if l == self._nodelen * 2:
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self._parents = (
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st[: self._nodelen],
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st[self._nodelen : 2 * self._nodelen],
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)
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elif l == 0:
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self._parents = (
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self._nodeconstants.nullid,
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self._nodeconstants.nullid,
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)
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else:
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raise error.Abort(
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_(b'working directory state appears damaged!')
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)
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return self._parents
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def setparents(self, p1, p2):
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self._parents = (p1, p2)
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self._dirtyparents = True
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def read(self):
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# ignore HG_PENDING because identity is used only for writing
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self.identity = util.filestat.frompath(
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self._opener.join(self._filename)
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)
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try:
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fp = self._opendirstatefile()
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try:
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st = fp.read()
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finally:
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fp.close()
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except IOError as err:
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if err.errno != errno.ENOENT:
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raise
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return
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if not st:
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return
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if util.safehasattr(parsers, b'dict_new_presized'):
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# Make an estimate of the number of files in the dirstate based on
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# its size. This trades wasting some memory for avoiding costly
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# resizes. Each entry have a prefix of 17 bytes followed by one or
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# two path names. Studies on various large-scale real-world repositories
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# found 54 bytes a reasonable upper limit for the average path names.
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# Copy entries are ignored for the sake of this estimate.
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self._map = parsers.dict_new_presized(len(st) // 71)
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# Python's garbage collector triggers a GC each time a certain number
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# of container objects (the number being defined by
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# gc.get_threshold()) are allocated. parse_dirstate creates a tuple
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# for each file in the dirstate. The C version then immediately marks
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# them as not to be tracked by the collector. However, this has no
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# effect on when GCs are triggered, only on what objects the GC looks
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# into. This means that O(number of files) GCs are unavoidable.
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# Depending on when in the process's lifetime the dirstate is parsed,
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# this can get very expensive. As a workaround, disable GC while
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# parsing the dirstate.
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#
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# (we cannot decorate the function directly since it is in a C module)
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parse_dirstate = util.nogc(parsers.parse_dirstate)
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p = parse_dirstate(self._map, self.copymap, st)
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if not self._dirtyparents:
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self.setparents(*p)
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# Avoid excess attribute lookups by fast pathing certain checks
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self.__contains__ = self._map.__contains__
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self.__getitem__ = self._map.__getitem__
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self.get = self._map.get
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def write(self, st, now):
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st.write(
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parsers.pack_dirstate(self._map, self.copymap, self.parents(), now)
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)
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st.close()
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self._dirtyparents = False
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self.nonnormalset, self.otherparentset = self.nonnormalentries()
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@propertycache
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def nonnormalset(self):
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nonnorm, otherparents = self.nonnormalentries()
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self.otherparentset = otherparents
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return nonnorm
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@propertycache
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def otherparentset(self):
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nonnorm, otherparents = self.nonnormalentries()
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self.nonnormalset = nonnorm
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return otherparents
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def non_normal_or_other_parent_paths(self):
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return self.nonnormalset.union(self.otherparentset)
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@propertycache
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def identity(self):
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self._map
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return self.identity
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@propertycache
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def dirfoldmap(self):
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f = {}
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normcase = util.normcase
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for name in self._dirs:
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f[normcase(name)] = name
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return f
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if rustmod is not None:
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class dirstatemap(object):
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def __init__(self, ui, opener, root, nodeconstants, use_dirstate_v2):
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self._use_dirstate_v2 = use_dirstate_v2
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self._nodeconstants = nodeconstants
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self._ui = ui
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self._opener = opener
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self._root = root
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self._filename = b'dirstate'
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self._nodelen = 20 # Also update Rust code when changing this!
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self._parents = None
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self._dirtyparents = False
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# for consistent view between _pl() and _read() invocations
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self._pendingmode = None
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self._use_dirstate_tree = self._ui.configbool(
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b"experimental",
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b"dirstate-tree.in-memory",
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False,
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)
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def addfile(
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self,
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f,
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mode=0,
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size=None,
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mtime=None,
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added=False,
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merged=False,
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from_p2=False,
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possibly_dirty=False,
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):
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return self._rustmap.addfile(
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f,
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mode,
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size,
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mtime,
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added,
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merged,
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from_p2,
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possibly_dirty,
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)
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def removefile(self, *args, **kwargs):
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return self._rustmap.removefile(*args, **kwargs)
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def dropfile(self, *args, **kwargs):
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return self._rustmap.dropfile(*args, **kwargs)
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def clearambiguoustimes(self, *args, **kwargs):
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return self._rustmap.clearambiguoustimes(*args, **kwargs)
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def nonnormalentries(self):
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return self._rustmap.nonnormalentries()
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def get(self, *args, **kwargs):
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return self._rustmap.get(*args, **kwargs)
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@property
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def copymap(self):
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return self._rustmap.copymap()
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def directories(self):
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return self._rustmap.directories()
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def preload(self):
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self._rustmap
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def clear(self):
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self._rustmap.clear()
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self.setparents(
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self._nodeconstants.nullid, self._nodeconstants.nullid
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)
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util.clearcachedproperty(self, b"_dirs")
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util.clearcachedproperty(self, b"_alldirs")
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util.clearcachedproperty(self, b"dirfoldmap")
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def items(self):
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return self._rustmap.items()
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def keys(self):
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return iter(self._rustmap)
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def __contains__(self, key):
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return key in self._rustmap
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def __getitem__(self, item):
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return self._rustmap[item]
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def __len__(self):
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return len(self._rustmap)
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def __iter__(self):
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return iter(self._rustmap)
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# forward for python2,3 compat
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iteritems = items
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def _opendirstatefile(self):
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fp, mode = txnutil.trypending(
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self._root, self._opener, self._filename
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)
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if self._pendingmode is not None and self._pendingmode != mode:
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fp.close()
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raise error.Abort(
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_(b'working directory state may be changed parallelly')
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)
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self._pendingmode = mode
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return fp
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def setparents(self, p1, p2):
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self._parents = (p1, p2)
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self._dirtyparents = True
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def parents(self):
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if not self._parents:
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if self._use_dirstate_v2:
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offset = len(rustmod.V2_FORMAT_MARKER)
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else:
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offset = 0
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read_len = offset + self._nodelen * 2
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try:
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fp = self._opendirstatefile()
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st = fp.read(read_len)
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fp.close()
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except IOError as err:
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if err.errno != errno.ENOENT:
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raise
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# File doesn't exist, so the current state is empty
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st = b''
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l = len(st)
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if l == read_len:
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st = st[offset:]
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self._parents = (
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st[: self._nodelen],
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st[self._nodelen : 2 * self._nodelen],
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)
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elif l == 0:
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self._parents = (
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self._nodeconstants.nullid,
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self._nodeconstants.nullid,
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)
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else:
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raise error.Abort(
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_(b'working directory state appears damaged!')
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)
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return self._parents
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@propertycache
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def _rustmap(self):
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"""
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Fills the Dirstatemap when called.
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"""
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# ignore HG_PENDING because identity is used only for writing
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self.identity = util.filestat.frompath(
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self._opener.join(self._filename)
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)
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try:
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fp = self._opendirstatefile()
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try:
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st = fp.read()
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finally:
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fp.close()
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except IOError as err:
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if err.errno != errno.ENOENT:
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raise
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st = b''
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self._rustmap, parents = rustmod.DirstateMap.new(
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self._use_dirstate_tree, self._use_dirstate_v2, st
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)
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if parents and not self._dirtyparents:
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self.setparents(*parents)
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self.__contains__ = self._rustmap.__contains__
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self.__getitem__ = self._rustmap.__getitem__
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self.get = self._rustmap.get
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return self._rustmap
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def write(self, st, now):
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parents = self.parents()
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packed = self._rustmap.write(
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self._use_dirstate_v2, parents[0], parents[1], now
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)
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st.write(packed)
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st.close()
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self._dirtyparents = False
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@propertycache
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def filefoldmap(self):
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"""Returns a dictionary mapping normalized case paths to their
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non-normalized versions.
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"""
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return self._rustmap.filefoldmapasdict()
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def hastrackeddir(self, d):
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return self._rustmap.hastrackeddir(d)
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def hasdir(self, d):
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return self._rustmap.hasdir(d)
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@propertycache
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def identity(self):
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self._rustmap
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return self.identity
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@property
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def nonnormalset(self):
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nonnorm = self._rustmap.non_normal_entries()
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return nonnorm
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@propertycache
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def otherparentset(self):
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otherparents = self._rustmap.other_parent_entries()
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return otherparents
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def non_normal_or_other_parent_paths(self):
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return self._rustmap.non_normal_or_other_parent_paths()
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@propertycache
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def dirfoldmap(self):
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f = {}
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normcase = util.normcase
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for name, _pseudo_entry in self.directories():
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f[normcase(name)] = name
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return f
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