revlog: remove some knowledge of sentinel nullid in index
I think the "-2" to mean "last position in index, not counting the
null revision at the end" is an implementation detail of the index
that we should avoid spreading knowledge of. I hope we can even remove
support for index[-2].
Differential Revision: https://phab.mercurial-scm.org/D4016
# dirstate.py - working directory tracking for mercurial
#
# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
#
# 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 collections
import contextlib
import errno
import os
import stat
from .i18n import _
from .node import nullid
from . import (
encoding,
error,
match as matchmod,
pathutil,
policy,
pycompat,
scmutil,
txnutil,
util,
)
parsers = policy.importmod(r'parsers')
propertycache = util.propertycache
filecache = scmutil.filecache
_rangemask = 0x7fffffff
dirstatetuple = parsers.dirstatetuple
class repocache(filecache):
"""filecache for files in .hg/"""
def join(self, obj, fname):
return obj._opener.join(fname)
class rootcache(filecache):
"""filecache for files in the repository root"""
def join(self, obj, fname):
return obj._join(fname)
def _getfsnow(vfs):
'''Get "now" timestamp on filesystem'''
tmpfd, tmpname = vfs.mkstemp()
try:
return os.fstat(tmpfd)[stat.ST_MTIME]
finally:
os.close(tmpfd)
vfs.unlink(tmpname)
class dirstate(object):
def __init__(self, opener, ui, root, validate, sparsematchfn):
'''Create a new dirstate object.
opener is an open()-like callable that can be used to open the
dirstate file; root is the root of the directory tracked by
the dirstate.
'''
self._opener = opener
self._validate = validate
self._root = root
self._sparsematchfn = sparsematchfn
# ntpath.join(root, '') of Python 2.7.9 does not add sep if root is
# UNC path pointing to root share (issue4557)
self._rootdir = pathutil.normasprefix(root)
self._dirty = False
self._lastnormaltime = 0
self._ui = ui
self._filecache = {}
self._parentwriters = 0
self._filename = 'dirstate'
self._pendingfilename = '%s.pending' % self._filename
self._plchangecallbacks = {}
self._origpl = None
self._updatedfiles = set()
self._mapcls = dirstatemap
@contextlib.contextmanager
def parentchange(self):
'''Context manager for handling dirstate parents.
If an exception occurs in the scope of the context manager,
the incoherent dirstate won't be written when wlock is
released.
'''
self._parentwriters += 1
yield
# Typically we want the "undo" step of a context manager in a
# finally block so it happens even when an exception
# occurs. In this case, however, we only want to decrement
# parentwriters if the code in the with statement exits
# normally, so we don't have a try/finally here on purpose.
self._parentwriters -= 1
def pendingparentchange(self):
'''Returns true if the dirstate is in the middle of a set of changes
that modify the dirstate parent.
'''
return self._parentwriters > 0
@propertycache
def _map(self):
"""Return the dirstate contents (see documentation for dirstatemap)."""
self._map = self._mapcls(self._ui, self._opener, self._root)
return self._map
@property
def _sparsematcher(self):
"""The matcher for the sparse checkout.
The working directory may not include every file from a manifest. The
matcher obtained by this property will match a path if it is to be
included in the working directory.
"""
# TODO there is potential to cache this property. For now, the matcher
# is resolved on every access. (But the called function does use a
# cache to keep the lookup fast.)
return self._sparsematchfn()
@repocache('branch')
def _branch(self):
try:
return self._opener.read("branch").strip() or "default"
except IOError as inst:
if inst.errno != errno.ENOENT:
raise
return "default"
@property
def _pl(self):
return self._map.parents()
def hasdir(self, d):
return self._map.hastrackeddir(d)
@rootcache('.hgignore')
def _ignore(self):
files = self._ignorefiles()
if not files:
return matchmod.never(self._root, '')
pats = ['include:%s' % f for f in files]
return matchmod.match(self._root, '', [], pats, warn=self._ui.warn)
@propertycache
def _slash(self):
return self._ui.configbool('ui', 'slash') and pycompat.ossep != '/'
@propertycache
def _checklink(self):
return util.checklink(self._root)
@propertycache
def _checkexec(self):
return util.checkexec(self._root)
@propertycache
def _checkcase(self):
return not util.fscasesensitive(self._join('.hg'))
def _join(self, f):
# much faster than os.path.join()
# it's safe because f is always a relative path
return self._rootdir + f
def flagfunc(self, buildfallback):
if self._checklink and self._checkexec:
def f(x):
try:
st = os.lstat(self._join(x))
if util.statislink(st):
return 'l'
if util.statisexec(st):
return 'x'
except OSError:
pass
return ''
return f
fallback = buildfallback()
if self._checklink:
def f(x):
if os.path.islink(self._join(x)):
return 'l'
if 'x' in fallback(x):
return 'x'
return ''
return f
if self._checkexec:
def f(x):
if 'l' in fallback(x):
return 'l'
if util.isexec(self._join(x)):
return 'x'
return ''
return f
else:
return fallback
@propertycache
def _cwd(self):
# internal config: ui.forcecwd
forcecwd = self._ui.config('ui', 'forcecwd')
if forcecwd:
return forcecwd
return pycompat.getcwd()
def getcwd(self):
'''Return the path from which a canonical path is calculated.
This path should be used to resolve file patterns or to convert
canonical paths back to file paths for display. It shouldn't be
used to get real file paths. Use vfs functions instead.
'''
cwd = self._cwd
if cwd == self._root:
return ''
# self._root ends with a path separator if self._root is '/' or 'C:\'
rootsep = self._root
if not util.endswithsep(rootsep):
rootsep += pycompat.ossep
if cwd.startswith(rootsep):
return cwd[len(rootsep):]
else:
# we're outside the repo. return an absolute path.
return cwd
def pathto(self, f, cwd=None):
if cwd is None:
cwd = self.getcwd()
path = util.pathto(self._root, cwd, f)
if self._slash:
return util.pconvert(path)
return path
def __getitem__(self, key):
'''Return the current state of key (a filename) in the dirstate.
States are:
n normal
m needs merging
r marked for removal
a marked for addition
? not tracked
'''
return self._map.get(key, ("?",))[0]
def __contains__(self, key):
return key in self._map
def __iter__(self):
return iter(sorted(self._map))
def items(self):
return self._map.iteritems()
iteritems = items
def parents(self):
return [self._validate(p) for p in self._pl]
def p1(self):
return self._validate(self._pl[0])
def p2(self):
return self._validate(self._pl[1])
def branch(self):
return encoding.tolocal(self._branch)
def setparents(self, p1, p2=nullid):
"""Set dirstate parents to p1 and p2.
When moving from two parents to one, 'm' merged entries a
adjusted to normal and previous copy records discarded and
returned by the call.
See localrepo.setparents()
"""
if self._parentwriters == 0:
raise ValueError("cannot set dirstate parent without "
"calling dirstate.beginparentchange")
self._dirty = True
oldp2 = self._pl[1]
if self._origpl is None:
self._origpl = self._pl
self._map.setparents(p1, p2)
copies = {}
if oldp2 != nullid and p2 == nullid:
candidatefiles = self._map.nonnormalset.union(
self._map.otherparentset)
for f in candidatefiles:
s = self._map.get(f)
if s is None:
continue
# Discard 'm' markers when moving away from a merge state
if s[0] == 'm':
source = self._map.copymap.get(f)
if source:
copies[f] = source
self.normallookup(f)
# Also fix up otherparent markers
elif s[0] == 'n' and s[2] == -2:
source = self._map.copymap.get(f)
if source:
copies[f] = source
self.add(f)
return copies
def setbranch(self, branch):
self._branch = encoding.fromlocal(branch)
f = self._opener('branch', 'w', atomictemp=True, checkambig=True)
try:
f.write(self._branch + '\n')
f.close()
# make sure filecache has the correct stat info for _branch after
# replacing the underlying file
ce = self._filecache['_branch']
if ce:
ce.refresh()
except: # re-raises
f.discard()
raise
def invalidate(self):
'''Causes the next access to reread the dirstate.
This is different from localrepo.invalidatedirstate() because it always
rereads the dirstate. Use localrepo.invalidatedirstate() if you want to
check whether the dirstate has changed before rereading it.'''
for a in (r"_map", r"_branch", r"_ignore"):
if a in self.__dict__:
delattr(self, a)
self._lastnormaltime = 0
self._dirty = False
self._updatedfiles.clear()
self._parentwriters = 0
self._origpl = None
def copy(self, source, dest):
"""Mark dest as a copy of source. Unmark dest if source is None."""
if source == dest:
return
self._dirty = True
if source is not None:
self._map.copymap[dest] = source
self._updatedfiles.add(source)
self._updatedfiles.add(dest)
elif self._map.copymap.pop(dest, None):
self._updatedfiles.add(dest)
def copied(self, file):
return self._map.copymap.get(file, None)
def copies(self):
return self._map.copymap
def _addpath(self, f, state, mode, size, mtime):
oldstate = self[f]
if state == 'a' or oldstate == 'r':
scmutil.checkfilename(f)
if self._map.hastrackeddir(f):
raise error.Abort(_('directory %r already in dirstate') %
pycompat.bytestr(f))
# shadows
for d in util.finddirs(f):
if self._map.hastrackeddir(d):
break
entry = self._map.get(d)
if entry is not None and entry[0] != 'r':
raise error.Abort(
_('file %r in dirstate clashes with %r') %
(pycompat.bytestr(d), pycompat.bytestr(f)))
self._dirty = True
self._updatedfiles.add(f)
self._map.addfile(f, oldstate, state, mode, size, mtime)
def normal(self, f):
'''Mark a file normal and clean.'''
s = os.lstat(self._join(f))
mtime = s[stat.ST_MTIME]
self._addpath(f, 'n', s.st_mode,
s.st_size & _rangemask, mtime & _rangemask)
self._map.copymap.pop(f, None)
if f in self._map.nonnormalset:
self._map.nonnormalset.remove(f)
if mtime > self._lastnormaltime:
# Remember the most recent modification timeslot for status(),
# to make sure we won't miss future size-preserving file content
# modifications that happen within the same timeslot.
self._lastnormaltime = mtime
def normallookup(self, f):
'''Mark a file normal, but possibly dirty.'''
if self._pl[1] != nullid:
# if there is a merge going on and the file was either
# in state 'm' (-1) or coming from other parent (-2) before
# being removed, restore that state.
entry = self._map.get(f)
if entry is not None:
if entry[0] == 'r' and entry[2] in (-1, -2):
source = self._map.copymap.get(f)
if entry[2] == -1:
self.merge(f)
elif entry[2] == -2:
self.otherparent(f)
if source:
self.copy(source, f)
return
if entry[0] == 'm' or entry[0] == 'n' and entry[2] == -2:
return
self._addpath(f, 'n', 0, -1, -1)
self._map.copymap.pop(f, None)
def otherparent(self, f):
'''Mark as coming from the other parent, always dirty.'''
if self._pl[1] == nullid:
raise error.Abort(_("setting %r to other parent "
"only allowed in merges") % f)
if f in self and self[f] == 'n':
# merge-like
self._addpath(f, 'm', 0, -2, -1)
else:
# add-like
self._addpath(f, 'n', 0, -2, -1)
self._map.copymap.pop(f, None)
def add(self, f):
'''Mark a file added.'''
self._addpath(f, 'a', 0, -1, -1)
self._map.copymap.pop(f, None)
def remove(self, f):
'''Mark a file removed.'''
self._dirty = True
oldstate = self[f]
size = 0
if self._pl[1] != nullid:
entry = self._map.get(f)
if entry is not None:
# backup the previous state
if entry[0] == 'm': # merge
size = -1
elif entry[0] == 'n' and entry[2] == -2: # other parent
size = -2
self._map.otherparentset.add(f)
self._updatedfiles.add(f)
self._map.removefile(f, oldstate, size)
if size == 0:
self._map.copymap.pop(f, None)
def merge(self, f):
'''Mark a file merged.'''
if self._pl[1] == nullid:
return self.normallookup(f)
return self.otherparent(f)
def drop(self, f):
'''Drop a file from the dirstate'''
oldstate = self[f]
if self._map.dropfile(f, oldstate):
self._dirty = True
self._updatedfiles.add(f)
self._map.copymap.pop(f, None)
def _discoverpath(self, path, normed, ignoremissing, exists, storemap):
if exists is None:
exists = os.path.lexists(os.path.join(self._root, path))
if not exists:
# Maybe a path component exists
if not ignoremissing and '/' in path:
d, f = path.rsplit('/', 1)
d = self._normalize(d, False, ignoremissing, None)
folded = d + "/" + f
else:
# No path components, preserve original case
folded = path
else:
# recursively normalize leading directory components
# against dirstate
if '/' in normed:
d, f = normed.rsplit('/', 1)
d = self._normalize(d, False, ignoremissing, True)
r = self._root + "/" + d
folded = d + "/" + util.fspath(f, r)
else:
folded = util.fspath(normed, self._root)
storemap[normed] = folded
return folded
def _normalizefile(self, path, isknown, ignoremissing=False, exists=None):
normed = util.normcase(path)
folded = self._map.filefoldmap.get(normed, None)
if folded is None:
if isknown:
folded = path
else:
folded = self._discoverpath(path, normed, ignoremissing, exists,
self._map.filefoldmap)
return folded
def _normalize(self, path, isknown, ignoremissing=False, exists=None):
normed = util.normcase(path)
folded = self._map.filefoldmap.get(normed, None)
if folded is None:
folded = self._map.dirfoldmap.get(normed, None)
if folded is None:
if isknown:
folded = path
else:
# store discovered result in dirfoldmap so that future
# normalizefile calls don't start matching directories
folded = self._discoverpath(path, normed, ignoremissing, exists,
self._map.dirfoldmap)
return folded
def normalize(self, path, isknown=False, ignoremissing=False):
'''
normalize the case of a pathname when on a casefolding filesystem
isknown specifies whether the filename came from walking the
disk, to avoid extra filesystem access.
If ignoremissing is True, missing path are returned
unchanged. Otherwise, we try harder to normalize possibly
existing path components.
The normalized case is determined based on the following precedence:
- version of name already stored in the dirstate
- version of name stored on disk
- version provided via command arguments
'''
if self._checkcase:
return self._normalize(path, isknown, ignoremissing)
return path
def clear(self):
self._map.clear()
self._lastnormaltime = 0
self._updatedfiles.clear()
self._dirty = True
def rebuild(self, parent, allfiles, changedfiles=None):
if changedfiles is None:
# Rebuild entire dirstate
changedfiles = allfiles
lastnormaltime = self._lastnormaltime
self.clear()
self._lastnormaltime = lastnormaltime
if self._origpl is None:
self._origpl = self._pl
self._map.setparents(parent, nullid)
for f in changedfiles:
if f in allfiles:
self.normallookup(f)
else:
self.drop(f)
self._dirty = True
def identity(self):
'''Return identity of dirstate itself to detect changing in storage
If identity of previous dirstate is equal to this, writing
changes based on the former dirstate out can keep consistency.
'''
return self._map.identity
def write(self, tr):
if not self._dirty:
return
filename = self._filename
if tr:
# 'dirstate.write()' is not only for writing in-memory
# changes out, but also for dropping ambiguous timestamp.
# delayed writing re-raise "ambiguous timestamp issue".
# See also the wiki page below for detail:
# https://www.mercurial-scm.org/wiki/DirstateTransactionPlan
# emulate dropping timestamp in 'parsers.pack_dirstate'
now = _getfsnow(self._opener)
self._map.clearambiguoustimes(self._updatedfiles, now)
# emulate that all 'dirstate.normal' results are written out
self._lastnormaltime = 0
self._updatedfiles.clear()
# delay writing in-memory changes out
tr.addfilegenerator('dirstate', (self._filename,),
self._writedirstate, location='plain')
return
st = self._opener(filename, "w", atomictemp=True, checkambig=True)
self._writedirstate(st)
def addparentchangecallback(self, category, callback):
"""add a callback to be called when the wd parents are changed
Callback will be called with the following arguments:
dirstate, (oldp1, oldp2), (newp1, newp2)
Category is a unique identifier to allow overwriting an old callback
with a newer callback.
"""
self._plchangecallbacks[category] = callback
def _writedirstate(self, st):
# notify callbacks about parents change
if self._origpl is not None and self._origpl != self._pl:
for c, callback in sorted(self._plchangecallbacks.iteritems()):
callback(self, self._origpl, self._pl)
self._origpl = None
# use the modification time of the newly created temporary file as the
# filesystem's notion of 'now'
now = util.fstat(st)[stat.ST_MTIME] & _rangemask
# enough 'delaywrite' prevents 'pack_dirstate' from dropping
# timestamp of each entries in dirstate, because of 'now > mtime'
delaywrite = self._ui.configint('debug', 'dirstate.delaywrite')
if delaywrite > 0:
# do we have any files to delay for?
for f, e in self._map.iteritems():
if e[0] == 'n' and e[3] == now:
import time # to avoid useless import
# rather than sleep n seconds, sleep until the next
# multiple of n seconds
clock = time.time()
start = int(clock) - (int(clock) % delaywrite)
end = start + delaywrite
time.sleep(end - clock)
now = end # trust our estimate that the end is near now
break
self._map.write(st, now)
self._lastnormaltime = 0
self._dirty = False
def _dirignore(self, f):
if f == '.':
return False
if self._ignore(f):
return True
for p in util.finddirs(f):
if self._ignore(p):
return True
return False
def _ignorefiles(self):
files = []
if os.path.exists(self._join('.hgignore')):
files.append(self._join('.hgignore'))
for name, path in self._ui.configitems("ui"):
if name == 'ignore' or name.startswith('ignore.'):
# we need to use os.path.join here rather than self._join
# because path is arbitrary and user-specified
files.append(os.path.join(self._rootdir, util.expandpath(path)))
return files
def _ignorefileandline(self, f):
files = collections.deque(self._ignorefiles())
visited = set()
while files:
i = files.popleft()
patterns = matchmod.readpatternfile(i, self._ui.warn,
sourceinfo=True)
for pattern, lineno, line in patterns:
kind, p = matchmod._patsplit(pattern, 'glob')
if kind == "subinclude":
if p not in visited:
files.append(p)
continue
m = matchmod.match(self._root, '', [], [pattern],
warn=self._ui.warn)
if m(f):
return (i, lineno, line)
visited.add(i)
return (None, -1, "")
def _walkexplicit(self, match, subrepos):
'''Get stat data about the files explicitly specified by match.
Return a triple (results, dirsfound, dirsnotfound).
- results is a mapping from filename to stat result. It also contains
listings mapping subrepos and .hg to None.
- dirsfound is a list of files found to be directories.
- dirsnotfound is a list of files that the dirstate thinks are
directories and that were not found.'''
def badtype(mode):
kind = _('unknown')
if stat.S_ISCHR(mode):
kind = _('character device')
elif stat.S_ISBLK(mode):
kind = _('block device')
elif stat.S_ISFIFO(mode):
kind = _('fifo')
elif stat.S_ISSOCK(mode):
kind = _('socket')
elif stat.S_ISDIR(mode):
kind = _('directory')
return _('unsupported file type (type is %s)') % kind
matchedir = match.explicitdir
badfn = match.bad
dmap = self._map
lstat = os.lstat
getkind = stat.S_IFMT
dirkind = stat.S_IFDIR
regkind = stat.S_IFREG
lnkkind = stat.S_IFLNK
join = self._join
dirsfound = []
foundadd = dirsfound.append
dirsnotfound = []
notfoundadd = dirsnotfound.append
if not match.isexact() and self._checkcase:
normalize = self._normalize
else:
normalize = None
files = sorted(match.files())
subrepos.sort()
i, j = 0, 0
while i < len(files) and j < len(subrepos):
subpath = subrepos[j] + "/"
if files[i] < subpath:
i += 1
continue
while i < len(files) and files[i].startswith(subpath):
del files[i]
j += 1
if not files or '.' in files:
files = ['.']
results = dict.fromkeys(subrepos)
results['.hg'] = None
for ff in files:
# constructing the foldmap is expensive, so don't do it for the
# common case where files is ['.']
if normalize and ff != '.':
nf = normalize(ff, False, True)
else:
nf = ff
if nf in results:
continue
try:
st = lstat(join(nf))
kind = getkind(st.st_mode)
if kind == dirkind:
if nf in dmap:
# file replaced by dir on disk but still in dirstate
results[nf] = None
if matchedir:
matchedir(nf)
foundadd((nf, ff))
elif kind == regkind or kind == lnkkind:
results[nf] = st
else:
badfn(ff, badtype(kind))
if nf in dmap:
results[nf] = None
except OSError as inst: # nf not found on disk - it is dirstate only
if nf in dmap: # does it exactly match a missing file?
results[nf] = None
else: # does it match a missing directory?
if self._map.hasdir(nf):
if matchedir:
matchedir(nf)
notfoundadd(nf)
else:
badfn(ff, encoding.strtolocal(inst.strerror))
# match.files() may contain explicitly-specified paths that shouldn't
# be taken; drop them from the list of files found. dirsfound/notfound
# aren't filtered here because they will be tested later.
if match.anypats():
for f in list(results):
if f == '.hg' or f in subrepos:
# keep sentinel to disable further out-of-repo walks
continue
if not match(f):
del results[f]
# Case insensitive filesystems cannot rely on lstat() failing to detect
# a case-only rename. Prune the stat object for any file that does not
# match the case in the filesystem, if there are multiple files that
# normalize to the same path.
if match.isexact() and self._checkcase:
normed = {}
for f, st in results.iteritems():
if st is None:
continue
nc = util.normcase(f)
paths = normed.get(nc)
if paths is None:
paths = set()
normed[nc] = paths
paths.add(f)
for norm, paths in normed.iteritems():
if len(paths) > 1:
for path in paths:
folded = self._discoverpath(path, norm, True, None,
self._map.dirfoldmap)
if path != folded:
results[path] = None
return results, dirsfound, dirsnotfound
def walk(self, match, subrepos, unknown, ignored, full=True):
'''
Walk recursively through the directory tree, finding all files
matched by match.
If full is False, maybe skip some known-clean files.
Return a dict mapping filename to stat-like object (either
mercurial.osutil.stat instance or return value of os.stat()).
'''
# full is a flag that extensions that hook into walk can use -- this
# implementation doesn't use it at all. This satisfies the contract
# because we only guarantee a "maybe".
if ignored:
ignore = util.never
dirignore = util.never
elif unknown:
ignore = self._ignore
dirignore = self._dirignore
else:
# if not unknown and not ignored, drop dir recursion and step 2
ignore = util.always
dirignore = util.always
matchfn = match.matchfn
matchalways = match.always()
matchtdir = match.traversedir
dmap = self._map
listdir = util.listdir
lstat = os.lstat
dirkind = stat.S_IFDIR
regkind = stat.S_IFREG
lnkkind = stat.S_IFLNK
join = self._join
exact = skipstep3 = False
if match.isexact(): # match.exact
exact = True
dirignore = util.always # skip step 2
elif match.prefix(): # match.match, no patterns
skipstep3 = True
if not exact and self._checkcase:
normalize = self._normalize
normalizefile = self._normalizefile
skipstep3 = False
else:
normalize = self._normalize
normalizefile = None
# step 1: find all explicit files
results, work, dirsnotfound = self._walkexplicit(match, subrepos)
skipstep3 = skipstep3 and not (work or dirsnotfound)
work = [d for d in work if not dirignore(d[0])]
# step 2: visit subdirectories
def traverse(work, alreadynormed):
wadd = work.append
while work:
nd = work.pop()
if not match.visitdir(nd):
continue
skip = None
if nd == '.':
nd = ''
else:
skip = '.hg'
try:
entries = listdir(join(nd), stat=True, skip=skip)
except OSError as inst:
if inst.errno in (errno.EACCES, errno.ENOENT):
match.bad(self.pathto(nd),
encoding.strtolocal(inst.strerror))
continue
raise
for f, kind, st in entries:
if normalizefile:
# even though f might be a directory, we're only
# interested in comparing it to files currently in the
# dmap -- therefore normalizefile is enough
nf = normalizefile(nd and (nd + "/" + f) or f, True,
True)
else:
nf = nd and (nd + "/" + f) or f
if nf not in results:
if kind == dirkind:
if not ignore(nf):
if matchtdir:
matchtdir(nf)
wadd(nf)
if nf in dmap and (matchalways or matchfn(nf)):
results[nf] = None
elif kind == regkind or kind == lnkkind:
if nf in dmap:
if matchalways or matchfn(nf):
results[nf] = st
elif ((matchalways or matchfn(nf))
and not ignore(nf)):
# unknown file -- normalize if necessary
if not alreadynormed:
nf = normalize(nf, False, True)
results[nf] = st
elif nf in dmap and (matchalways or matchfn(nf)):
results[nf] = None
for nd, d in work:
# alreadynormed means that processwork doesn't have to do any
# expensive directory normalization
alreadynormed = not normalize or nd == d
traverse([d], alreadynormed)
for s in subrepos:
del results[s]
del results['.hg']
# step 3: visit remaining files from dmap
if not skipstep3 and not exact:
# If a dmap file is not in results yet, it was either
# a) not matching matchfn b) ignored, c) missing, or d) under a
# symlink directory.
if not results and matchalways:
visit = [f for f in dmap]
else:
visit = [f for f in dmap if f not in results and matchfn(f)]
visit.sort()
if unknown:
# unknown == True means we walked all dirs under the roots
# that wasn't ignored, and everything that matched was stat'ed
# and is already in results.
# The rest must thus be ignored or under a symlink.
audit_path = pathutil.pathauditor(self._root, cached=True)
for nf in iter(visit):
# If a stat for the same file was already added with a
# different case, don't add one for this, since that would
# make it appear as if the file exists under both names
# on disk.
if (normalizefile and
normalizefile(nf, True, True) in results):
results[nf] = None
# Report ignored items in the dmap as long as they are not
# under a symlink directory.
elif audit_path.check(nf):
try:
results[nf] = lstat(join(nf))
# file was just ignored, no links, and exists
except OSError:
# file doesn't exist
results[nf] = None
else:
# It's either missing or under a symlink directory
# which we in this case report as missing
results[nf] = None
else:
# We may not have walked the full directory tree above,
# so stat and check everything we missed.
iv = iter(visit)
for st in util.statfiles([join(i) for i in visit]):
results[next(iv)] = st
return results
def status(self, match, subrepos, ignored, clean, unknown):
'''Determine the status of the working copy relative to the
dirstate and return a pair of (unsure, status), where status is of type
scmutil.status and:
unsure:
files that might have been modified since the dirstate was
written, but need to be read to be sure (size is the same
but mtime differs)
status.modified:
files that have definitely been modified since the dirstate
was written (different size or mode)
status.clean:
files that have definitely not been modified since the
dirstate was written
'''
listignored, listclean, listunknown = ignored, clean, unknown
lookup, modified, added, unknown, ignored = [], [], [], [], []
removed, deleted, clean = [], [], []
dmap = self._map
dmap.preload()
dcontains = dmap.__contains__
dget = dmap.__getitem__
ladd = lookup.append # aka "unsure"
madd = modified.append
aadd = added.append
uadd = unknown.append
iadd = ignored.append
radd = removed.append
dadd = deleted.append
cadd = clean.append
mexact = match.exact
dirignore = self._dirignore
checkexec = self._checkexec
copymap = self._map.copymap
lastnormaltime = self._lastnormaltime
# We need to do full walks when either
# - we're listing all clean files, or
# - match.traversedir does something, because match.traversedir should
# be called for every dir in the working dir
full = listclean or match.traversedir is not None
for fn, st in self.walk(match, subrepos, listunknown, listignored,
full=full).iteritems():
if not dcontains(fn):
if (listignored or mexact(fn)) and dirignore(fn):
if listignored:
iadd(fn)
else:
uadd(fn)
continue
# This is equivalent to 'state, mode, size, time = dmap[fn]' but not
# written like that for performance reasons. dmap[fn] is not a
# Python tuple in compiled builds. The CPython UNPACK_SEQUENCE
# opcode has fast paths when the value to be unpacked is a tuple or
# a list, but falls back to creating a full-fledged iterator in
# general. That is much slower than simply accessing and storing the
# tuple members one by one.
t = dget(fn)
state = t[0]
mode = t[1]
size = t[2]
time = t[3]
if not st and state in "nma":
dadd(fn)
elif state == 'n':
if (size >= 0 and
((size != st.st_size and size != st.st_size & _rangemask)
or ((mode ^ st.st_mode) & 0o100 and checkexec))
or size == -2 # other parent
or fn in copymap):
madd(fn)
elif (time != st[stat.ST_MTIME]
and time != st[stat.ST_MTIME] & _rangemask):
ladd(fn)
elif st[stat.ST_MTIME] == lastnormaltime:
# fn may have just been marked as normal and it may have
# changed in the same second without changing its size.
# This can happen if we quickly do multiple commits.
# Force lookup, so we don't miss such a racy file change.
ladd(fn)
elif listclean:
cadd(fn)
elif state == 'm':
madd(fn)
elif state == 'a':
aadd(fn)
elif state == 'r':
radd(fn)
return (lookup, scmutil.status(modified, added, removed, deleted,
unknown, ignored, clean))
def matches(self, match):
'''
return files in the dirstate (in whatever state) filtered by match
'''
dmap = self._map
if match.always():
return dmap.keys()
files = match.files()
if match.isexact():
# fast path -- filter the other way around, since typically files is
# much smaller than dmap
return [f for f in files if f in dmap]
if match.prefix() and all(fn in dmap for fn in files):
# fast path -- all the values are known to be files, so just return
# that
return list(files)
return [f for f in dmap if match(f)]
def _actualfilename(self, tr):
if tr:
return self._pendingfilename
else:
return self._filename
def savebackup(self, tr, backupname):
'''Save current dirstate into backup file'''
filename = self._actualfilename(tr)
assert backupname != filename
# use '_writedirstate' instead of 'write' to write changes certainly,
# because the latter omits writing out if transaction is running.
# output file will be used to create backup of dirstate at this point.
if self._dirty or not self._opener.exists(filename):
self._writedirstate(self._opener(filename, "w", atomictemp=True,
checkambig=True))
if tr:
# ensure that subsequent tr.writepending returns True for
# changes written out above, even if dirstate is never
# changed after this
tr.addfilegenerator('dirstate', (self._filename,),
self._writedirstate, location='plain')
# ensure that pending file written above is unlinked at
# failure, even if tr.writepending isn't invoked until the
# end of this transaction
tr.registertmp(filename, location='plain')
self._opener.tryunlink(backupname)
# hardlink backup is okay because _writedirstate is always called
# with an "atomictemp=True" file.
util.copyfile(self._opener.join(filename),
self._opener.join(backupname), hardlink=True)
def restorebackup(self, tr, backupname):
'''Restore dirstate by backup file'''
# this "invalidate()" prevents "wlock.release()" from writing
# changes of dirstate out after restoring from backup file
self.invalidate()
filename = self._actualfilename(tr)
o = self._opener
if util.samefile(o.join(backupname), o.join(filename)):
o.unlink(backupname)
else:
o.rename(backupname, filename, checkambig=True)
def clearbackup(self, tr, backupname):
'''Clear backup file'''
self._opener.unlink(backupname)
class dirstatemap(object):
"""Map encapsulating the dirstate's contents.
The dirstate contains the following state:
- `identity` is the identity of the dirstate file, which can be used to
detect when changes have occurred to the dirstate file.
- `parents` is a pair containing the parents of the working copy. The
parents are updated by calling `setparents`.
- the state map maps filenames to tuples of (state, mode, size, mtime),
where state is a single character representing 'normal', 'added',
'removed', or 'merged'. It is read by treating the dirstate as a
dict. File state is updated by calling the `addfile`, `removefile` and
`dropfile` methods.
- `copymap` maps destination filenames to their source filename.
The dirstate also provides the following views onto the state:
- `nonnormalset` is a set of the filenames that have state other
than 'normal', or are normal but have an mtime of -1 ('normallookup').
- `otherparentset` is a set of the filenames that are marked as coming
from the second parent when the dirstate is currently being merged.
- `filefoldmap` is a dict mapping normalized filenames to the denormalized
form that they appear as in the dirstate.
- `dirfoldmap` is a dict mapping normalized directory names to the
denormalized form that they appear as in the dirstate.
"""
def __init__(self, ui, opener, root):
self._ui = ui
self._opener = opener
self._root = root
self._filename = 'dirstate'
self._parents = None
self._dirtyparents = False
# for consistent view between _pl() and _read() invocations
self._pendingmode = None
@propertycache
def _map(self):
self._map = {}
self.read()
return self._map
@propertycache
def copymap(self):
self.copymap = {}
self._map
return self.copymap
def clear(self):
self._map.clear()
self.copymap.clear()
self.setparents(nullid, nullid)
util.clearcachedproperty(self, "_dirs")
util.clearcachedproperty(self, "_alldirs")
util.clearcachedproperty(self, "filefoldmap")
util.clearcachedproperty(self, "dirfoldmap")
util.clearcachedproperty(self, "nonnormalset")
util.clearcachedproperty(self, "otherparentset")
def items(self):
return self._map.iteritems()
# forward for python2,3 compat
iteritems = items
def __len__(self):
return len(self._map)
def __iter__(self):
return iter(self._map)
def get(self, key, default=None):
return self._map.get(key, default)
def __contains__(self, key):
return key in self._map
def __getitem__(self, key):
return self._map[key]
def keys(self):
return self._map.keys()
def preload(self):
"""Loads the underlying data, if it's not already loaded"""
self._map
def addfile(self, f, oldstate, state, mode, size, mtime):
"""Add a tracked file to the dirstate."""
if oldstate in "?r" and r"_dirs" in self.__dict__:
self._dirs.addpath(f)
if oldstate == "?" and r"_alldirs" in self.__dict__:
self._alldirs.addpath(f)
self._map[f] = dirstatetuple(state, mode, size, mtime)
if state != 'n' or mtime == -1:
self.nonnormalset.add(f)
if size == -2:
self.otherparentset.add(f)
def removefile(self, f, oldstate, size):
"""
Mark a file as removed in the dirstate.
The `size` parameter is used to store sentinel values that indicate
the file's previous state. In the future, we should refactor this
to be more explicit about what that state is.
"""
if oldstate not in "?r" and r"_dirs" in self.__dict__:
self._dirs.delpath(f)
if oldstate == "?" and r"_alldirs" in self.__dict__:
self._alldirs.addpath(f)
if r"filefoldmap" in self.__dict__:
normed = util.normcase(f)
self.filefoldmap.pop(normed, None)
self._map[f] = dirstatetuple('r', 0, size, 0)
self.nonnormalset.add(f)
def dropfile(self, f, oldstate):
"""
Remove a file from the dirstate. Returns True if the file was
previously recorded.
"""
exists = self._map.pop(f, None) is not None
if exists:
if oldstate != "r" and r"_dirs" in self.__dict__:
self._dirs.delpath(f)
if r"_alldirs" in self.__dict__:
self._alldirs.delpath(f)
if r"filefoldmap" in self.__dict__:
normed = util.normcase(f)
self.filefoldmap.pop(normed, None)
self.nonnormalset.discard(f)
return exists
def clearambiguoustimes(self, files, now):
for f in files:
e = self.get(f)
if e is not None and e[0] == 'n' and e[3] == now:
self._map[f] = dirstatetuple(e[0], e[1], e[2], -1)
self.nonnormalset.add(f)
def nonnormalentries(self):
'''Compute the nonnormal dirstate entries from the dmap'''
try:
return parsers.nonnormalotherparententries(self._map)
except AttributeError:
nonnorm = set()
otherparent = set()
for fname, e in self._map.iteritems():
if e[0] != 'n' or e[3] == -1:
nonnorm.add(fname)
if e[0] == 'n' and e[2] == -2:
otherparent.add(fname)
return nonnorm, otherparent
@propertycache
def filefoldmap(self):
"""Returns a dictionary mapping normalized case paths to their
non-normalized versions.
"""
try:
makefilefoldmap = parsers.make_file_foldmap
except AttributeError:
pass
else:
return makefilefoldmap(self._map, util.normcasespec,
util.normcasefallback)
f = {}
normcase = util.normcase
for name, s in self._map.iteritems():
if s[0] != 'r':
f[normcase(name)] = name
f['.'] = '.' # prevents useless util.fspath() invocation
return f
def hastrackeddir(self, d):
"""
Returns True if the dirstate contains a tracked (not removed) file
in this directory.
"""
return d in self._dirs
def hasdir(self, d):
"""
Returns True if the dirstate contains a file (tracked or removed)
in this directory.
"""
return d in self._alldirs
@propertycache
def _dirs(self):
return util.dirs(self._map, 'r')
@propertycache
def _alldirs(self):
return util.dirs(self._map)
def _opendirstatefile(self):
fp, mode = txnutil.trypending(self._root, self._opener, self._filename)
if self._pendingmode is not None and self._pendingmode != mode:
fp.close()
raise error.Abort(_('working directory state may be '
'changed parallelly'))
self._pendingmode = mode
return fp
def parents(self):
if not self._parents:
try:
fp = self._opendirstatefile()
st = fp.read(40)
fp.close()
except IOError as err:
if err.errno != errno.ENOENT:
raise
# File doesn't exist, so the current state is empty
st = ''
l = len(st)
if l == 40:
self._parents = st[:20], st[20:40]
elif l == 0:
self._parents = [nullid, nullid]
else:
raise error.Abort(_('working directory state appears '
'damaged!'))
return self._parents
def setparents(self, p1, p2):
self._parents = (p1, p2)
self._dirtyparents = True
def read(self):
# ignore HG_PENDING because identity is used only for writing
self.identity = util.filestat.frompath(
self._opener.join(self._filename))
try:
fp = self._opendirstatefile()
try:
st = fp.read()
finally:
fp.close()
except IOError as err:
if err.errno != errno.ENOENT:
raise
return
if not st:
return
if util.safehasattr(parsers, 'dict_new_presized'):
# Make an estimate of the number of files in the dirstate based on
# its size. From a linear regression on a set of real-world repos,
# all over 10,000 files, the size of a dirstate entry is 85
# bytes. The cost of resizing is significantly higher than the cost
# of filling in a larger presized dict, so subtract 20% from the
# size.
#
# This heuristic is imperfect in many ways, so in a future dirstate
# format update it makes sense to just record the number of entries
# on write.
self._map = parsers.dict_new_presized(len(st) // 71)
# Python's garbage collector triggers a GC each time a certain number
# of container objects (the number being defined by
# gc.get_threshold()) are allocated. parse_dirstate creates a tuple
# for each file in the dirstate. The C version then immediately marks
# them as not to be tracked by the collector. However, this has no
# effect on when GCs are triggered, only on what objects the GC looks
# into. This means that O(number of files) GCs are unavoidable.
# Depending on when in the process's lifetime the dirstate is parsed,
# this can get very expensive. As a workaround, disable GC while
# parsing the dirstate.
#
# (we cannot decorate the function directly since it is in a C module)
parse_dirstate = util.nogc(parsers.parse_dirstate)
p = parse_dirstate(self._map, self.copymap, st)
if not self._dirtyparents:
self.setparents(*p)
# Avoid excess attribute lookups by fast pathing certain checks
self.__contains__ = self._map.__contains__
self.__getitem__ = self._map.__getitem__
self.get = self._map.get
def write(self, st, now):
st.write(parsers.pack_dirstate(self._map, self.copymap,
self.parents(), now))
st.close()
self._dirtyparents = False
self.nonnormalset, self.otherparentset = self.nonnormalentries()
@propertycache
def nonnormalset(self):
nonnorm, otherparents = self.nonnormalentries()
self.otherparentset = otherparents
return nonnorm
@propertycache
def otherparentset(self):
nonnorm, otherparents = self.nonnormalentries()
self.nonnormalset = nonnorm
return otherparents
@propertycache
def identity(self):
self._map
return self.identity
@propertycache
def dirfoldmap(self):
f = {}
normcase = util.normcase
for name in self._dirs:
f[normcase(name)] = name
return f