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# 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 node import nullid
from i18n import _
import scmutil, util, ignore, osutil, parsers, encoding
import struct, os, stat, errno
import cStringIO
_format = ">cllll"
propertycache = util.propertycache
def _finddirs(path):
pos = path.rfind('/')
while pos != -1:
yield path[:pos]
pos = path.rfind('/', 0, pos)
def _incdirs(dirs, path):
for base in _finddirs(path):
if base in dirs:
dirs[base] += 1
return
dirs[base] = 1
def _decdirs(dirs, path):
for base in _finddirs(path):
if dirs[base] > 1:
dirs[base] -= 1
return
del dirs[base]
class dirstate(object):
def __init__(self, opener, ui, root, validate):
'''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._rootdir = os.path.join(root, '')
self._dirty = False
self._dirtypl = False
self._lastnormaltime = None
self._ui = ui
@propertycache
def _map(self):
'''Return the dirstate contents as a map from filename to
(state, mode, size, time).'''
self._read()
return self._map
@propertycache
def _copymap(self):
self._read()
return self._copymap
@propertycache
def _foldmap(self):
f = {}
for name in self._map:
f[os.path.normcase(name)] = name
return f
@propertycache
def _branch(self):
try:
return self._opener.read("branch").strip() or "default"
except IOError:
return "default"
@propertycache
def _pl(self):
try:
fp = self._opener("dirstate")
st = fp.read(40)
fp.close()
l = len(st)
if l == 40:
return st[:20], st[20:40]
elif l > 0 and l < 40:
raise util.Abort(_('working directory state appears damaged!'))
except IOError, err:
if err.errno != errno.ENOENT:
raise
return [nullid, nullid]
@propertycache
def _dirs(self):
dirs = {}
for f, s in self._map.iteritems():
if s[0] != 'r':
_incdirs(dirs, f)
return dirs
@propertycache
def _ignore(self):
files = [self._join('.hgignore')]
for name, path in self._ui.configitems("ui"):
if name == 'ignore' or name.startswith('ignore.'):
files.append(util.expandpath(path))
return ignore.ignore(self._root, files, self._ui.warn)
@propertycache
def _slash(self):
return self._ui.configbool('ui', 'slash') and os.sep != '/'
@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.checkcase(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, fallback):
if self._checklink:
if self._checkexec:
def f(x):
p = self._join(x)
if os.path.islink(p):
return 'l'
if util.isexec(p):
return 'x'
return ''
return f
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
return fallback
def getcwd(self):
cwd = os.getcwd()
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 += os.sep
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.normpath(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):
for x in sorted(self._map):
yield x
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):
self._dirty = self._dirtypl = True
self._pl = p1, p2
def setbranch(self, branch):
if branch in ['tip', '.', 'null']:
raise util.Abort(_('the name \'%s\' is reserved') % branch)
self._branch = encoding.fromlocal(branch)
self._opener.write("branch", self._branch + '\n')
def _read(self):
self._map = {}
self._copymap = {}
try:
st = self._opener.read("dirstate")
except IOError, err:
if err.errno != errno.ENOENT:
raise
return
if not st:
return
p = parsers.parse_dirstate(self._map, self._copymap, st)
if not self._dirtypl:
self._pl = p
def invalidate(self):
for a in ("_map", "_copymap", "_foldmap", "_branch", "_pl", "_dirs",
"_ignore"):
if a in self.__dict__:
delattr(self, a)
self._lastnormaltime = None
self._dirty = False
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._copymap[dest] = source
elif dest in self._copymap:
del self._copymap[dest]
def copied(self, file):
return self._copymap.get(file, None)
def copies(self):
return self._copymap
def _droppath(self, f):
if self[f] not in "?r" and "_dirs" in self.__dict__:
_decdirs(self._dirs, f)
def _addpath(self, f, check=False):
oldstate = self[f]
if check or oldstate == "r":
scmutil.checkfilename(f)
if f in self._dirs:
raise util.Abort(_('directory %r already in dirstate') % f)
# shadows
for d in _finddirs(f):
if d in self._dirs:
break
if d in self._map and self[d] != 'r':
raise util.Abort(
_('file %r in dirstate clashes with %r') % (d, f))
if oldstate in "?r" and "_dirs" in self.__dict__:
_incdirs(self._dirs, f)
def normal(self, f):
'''Mark a file normal and clean.'''
self._dirty = True
self._addpath(f)
s = os.lstat(self._join(f))
mtime = int(s.st_mtime)
self._map[f] = ('n', s.st_mode, s.st_size, mtime)
if f in self._copymap:
del self._copymap[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 and f in self._map:
# 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[f]
if entry[0] == 'r' and entry[2] in (-1, -2):
source = self._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._dirty = True
self._addpath(f)
self._map[f] = ('n', 0, -1, -1)
if f in self._copymap:
del self._copymap[f]
def otherparent(self, f):
'''Mark as coming from the other parent, always dirty.'''
if self._pl[1] == nullid:
raise util.Abort(_("setting %r to other parent "
"only allowed in merges") % f)
self._dirty = True
self._addpath(f)
self._map[f] = ('n', 0, -2, -1)
if f in self._copymap:
del self._copymap[f]
def add(self, f):
'''Mark a file added.'''
self._dirty = True
self._addpath(f, True)
self._map[f] = ('a', 0, -1, -1)
if f in self._copymap:
del self._copymap[f]
def remove(self, f):
'''Mark a file removed.'''
self._dirty = True
self._droppath(f)
size = 0
if self._pl[1] != nullid and f in self._map:
# backup the previous state
entry = self._map[f]
if entry[0] == 'm': # merge
size = -1
elif entry[0] == 'n' and entry[2] == -2: # other parent
size = -2
self._map[f] = ('r', 0, size, 0)
if size == 0 and f in self._copymap:
del self._copymap[f]
def merge(self, f):
'''Mark a file merged.'''
self._dirty = True
s = os.lstat(self._join(f))
self._addpath(f)
self._map[f] = ('m', s.st_mode, s.st_size, int(s.st_mtime))
if f in self._copymap:
del self._copymap[f]
def drop(self, f):
'''Drop a file from the dirstate'''
self._dirty = True
self._droppath(f)
del self._map[f]
def _normalize(self, path, isknown):
normed = os.path.normcase(path)
folded = self._foldmap.get(normed, None)
if folded is None:
if isknown or not os.path.lexists(os.path.join(self._root, path)):
folded = path
else:
folded = self._foldmap.setdefault(normed,
util.fspath(path, self._root))
return folded
def normalize(self, path, isknown=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
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)
return path
def clear(self):
self._map = {}
if "_dirs" in self.__dict__:
delattr(self, "_dirs")
self._copymap = {}
self._pl = [nullid, nullid]
self._lastnormaltime = None
self._dirty = True
def rebuild(self, parent, files):
self.clear()
for f in files:
if 'x' in files.flags(f):
self._map[f] = ('n', 0777, -1, 0)
else:
self._map[f] = ('n', 0666, -1, 0)
self._pl = (parent, nullid)
self._dirty = True
def write(self):
if not self._dirty:
return
st = self._opener("dirstate", "w", atomictemp=True)
# use the modification time of the newly created temporary file as the
# filesystem's notion of 'now'
now = int(util.fstat(st).st_mtime)
cs = cStringIO.StringIO()
copymap = self._copymap
pack = struct.pack
write = cs.write
write("".join(self._pl))
for f, e in self._map.iteritems():
if e[0] == '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 stat data in
# dirstate, forcing future 'status' calls to compare the
# contents of the file. This prevents mistakenly treating such
# files as clean.
e = (e[0], 0, -1, -1) # mark entry as 'unset'
self._map[f] = e
if f in copymap:
f = "%s\0%s" % (f, copymap[f])
e = pack(_format, e[0], e[1], e[2], e[3], len(f))
write(e)
write(f)
st.write(cs.getvalue())
st.rename()
self._lastnormaltime = None
self._dirty = self._dirtypl = False
def _dirignore(self, f):
if f == '.':
return False
if self._ignore(f):
return True
for p in _finddirs(f):
if self._ignore(p):
return True
return False
def walk(self, match, subrepos, unknown, ignored):
'''
Walk recursively through the directory tree, finding all files
matched by match.
Return a dict mapping filename to stat-like object (either
mercurial.osutil.stat instance or return value of os.stat()).
'''
def fwarn(f, msg):
self._ui.warn('%s: %s\n' % (self.pathto(f), msg))
return False
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
ignore = self._ignore
dirignore = self._dirignore
if ignored:
ignore = util.never
dirignore = util.never
elif not unknown:
# if unknown and ignored are False, skip step 2
ignore = util.always
dirignore = util.always
matchfn = match.matchfn
badfn = match.bad
dmap = self._map
normpath = util.normpath
listdir = osutil.listdir
lstat = os.lstat
getkind = stat.S_IFMT
dirkind = stat.S_IFDIR
regkind = stat.S_IFREG
lnkkind = stat.S_IFLNK
join = self._join
work = []
wadd = work.append
exact = skipstep3 = False
if matchfn == match.exact: # match.exact
exact = True
dirignore = util.always # skip step 2
elif match.files() and not match.anypats(): # match.match, no patterns
skipstep3 = True
if self._checkcase:
normalize = self._normalize
skipstep3 = False
else:
normalize = lambda x, y: x
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
# step 1: find all explicit files
for ff in files:
nf = normalize(normpath(ff), False)
if nf in results:
continue
try:
st = lstat(join(nf))
kind = getkind(st.st_mode)
if kind == dirkind:
skipstep3 = False
if nf in dmap:
#file deleted on disk but still in dirstate
results[nf] = None
match.dir(nf)
if not dirignore(nf):
wadd(nf)
elif kind == regkind or kind == lnkkind:
results[nf] = st
else:
badfn(ff, badtype(kind))
if nf in dmap:
results[nf] = None
except OSError, inst:
if nf in dmap: # does it exactly match a file?
results[nf] = None
else: # does it match a directory?
prefix = nf + "/"
for fn in dmap:
if fn.startswith(prefix):
match.dir(nf)
skipstep3 = False
break
else:
badfn(ff, inst.strerror)
# step 2: visit subdirectories
while work:
nd = work.pop()
skip = None
if nd == '.':
nd = ''
else:
skip = '.hg'
try:
entries = listdir(join(nd), stat=True, skip=skip)
except OSError, inst:
if inst.errno == errno.EACCES:
fwarn(nd, inst.strerror)
continue
raise
for f, kind, st in entries:
nf = normalize(nd and (nd + "/" + f) or f, True)
if nf not in results:
if kind == dirkind:
if not ignore(nf):
match.dir(nf)
wadd(nf)
if nf in dmap and matchfn(nf):
results[nf] = None
elif kind == regkind or kind == lnkkind:
if nf in dmap:
if matchfn(nf):
results[nf] = st
elif matchfn(nf) and not ignore(nf):
results[nf] = st
elif nf in dmap and matchfn(nf):
results[nf] = None
# step 3: report unseen items in the dmap hash
if not skipstep3 and not exact:
visit = sorted([f for f in dmap if f not in results and matchfn(f)])
for nf, st in zip(visit, util.statfiles([join(i) for i in visit])):
if not st is None and not getkind(st.st_mode) in (regkind, lnkkind):
st = None
results[nf] = st
for s in subrepos:
del results[s]
del results['.hg']
return results
def status(self, match, subrepos, ignored, clean, unknown):
'''Determine the status of the working copy relative to the
dirstate and return a tuple of lists (unsure, modified, added,
removed, deleted, unknown, ignored, clean), where:
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)
modified:
files that have definitely been modified since the dirstate
was written (different size or mode)
added:
files that have been explicitly added with hg add
removed:
files that have been explicitly removed with hg remove
deleted:
files that have been deleted through other means ("missing")
unknown:
files not in the dirstate that are not ignored
ignored:
files not in the dirstate that are ignored
(by _dirignore())
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
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
lnkkind = stat.S_IFLNK
for fn, st in self.walk(match, subrepos, listunknown,
listignored).iteritems():
if fn not in dmap:
if (listignored or match.exact(fn)) and self._dirignore(fn):
if listignored:
iadd(fn)
elif listunknown:
uadd(fn)
continue
state, mode, size, time = dmap[fn]
if not st and state in "nma":
dadd(fn)
elif state == 'n':
# The "mode & lnkkind != lnkkind or self._checklink"
# lines are an expansion of "islink => checklink"
# where islink means "is this a link?" and checklink
# means "can we check links?".
mtime = int(st.st_mtime)
if (size >= 0 and
(size != st.st_size
or ((mode ^ st.st_mode) & 0100 and self._checkexec))
and (mode & lnkkind != lnkkind or self._checklink)
or size == -2 # other parent
or fn in self._copymap):
madd(fn)
elif (mtime != time
and (mode & lnkkind != lnkkind or self._checklink)):
ladd(fn)
elif mtime == self._lastnormaltime:
# fn may have been changed in the same timeslot without
# changing its size. This can happen if we quickly do
# multiple commits in a single transaction.
# 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, modified, added, removed, deleted, unknown, ignored,
clean)