Mercurial > hg
view mercurial/dirstate.py @ 50002:e358f6e0e50e
dirstate: do not write an empty dirstate just for backup
This will get in the way when we get more strict about holding the lock when
writing the dirstate.
Instead, we simply don't copy dirstate files around if there are None at backup
time.
A couple of tests are impacted they no longer need to backup such "empty"
dirstate.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 14 Feb 2023 23:05:18 +0100 |
parents | 9313d8666a0f |
children | f4eef08575ce |
line wrap: on
line source
# dirstate.py - working directory tracking for mercurial # # Copyright 2005-2007 Olivia Mackall <olivia@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. import collections import contextlib import os import stat import uuid from .i18n import _ from .pycompat import delattr from hgdemandimport import tracing from . import ( dirstatemap, encoding, error, match as matchmod, node, pathutil, policy, pycompat, scmutil, util, ) from .dirstateutils import ( docket as docketmod, timestamp, ) from .interfaces import ( dirstate as intdirstate, util as interfaceutil, ) parsers = policy.importmod('parsers') rustmod = policy.importrust('dirstate') HAS_FAST_DIRSTATE_V2 = rustmod is not None propertycache = util.propertycache filecache = scmutil.filecache _rangemask = dirstatemap.rangemask DirstateItem = dirstatemap.DirstateItem 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 requires_changing_parents(func): def wrap(self, *args, **kwargs): if not self.pendingparentchange(): msg = 'calling `%s` outside of a changing_parents context' msg %= func.__name__ raise error.ProgrammingError(msg) if self._invalidated_context: msg = 'calling `%s` after the dirstate was invalidated' raise error.ProgrammingError(msg) return func(self, *args, **kwargs) return wrap def requires_not_changing_parents(func): def wrap(self, *args, **kwargs): if self.pendingparentchange(): msg = 'calling `%s` inside of a changing_parents context' msg %= func.__name__ raise error.ProgrammingError(msg) return func(self, *args, **kwargs) return wrap @interfaceutil.implementer(intdirstate.idirstate) class dirstate: def __init__( self, opener, ui, root, validate, sparsematchfn, nodeconstants, use_dirstate_v2, use_tracked_hint=False, ): """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._use_dirstate_v2 = use_dirstate_v2 self._use_tracked_hint = use_tracked_hint self._nodeconstants = nodeconstants self._opener = opener self._validate = validate self._root = root # Either build a sparse-matcher or None if sparse is disabled 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) # True is any internal state may be different self._dirty = False # True if the set of tracked file may be different self._dirty_tracked_set = False self._ui = ui self._filecache = {} # nesting level of `changing_parents` context self._parentwriters = 0 # True if the current dirstate changing operations have been # invalidated (used to make sure all nested contexts have been exited) self._invalidated_context = False self._filename = b'dirstate' self._filename_th = b'dirstate-tracked-hint' self._pendingfilename = b'%s.pending' % self._filename self._plchangecallbacks = {} self._origpl = None self._mapcls = dirstatemap.dirstatemap # Access and cache cwd early, so we don't access it for the first time # after a working-copy update caused it to not exist (accessing it then # raises an exception). self._cwd def prefetch_parents(self): """make sure the parents are loaded Used to avoid a race condition. """ self._pl @contextlib.contextmanager def changing_parents(self, repo): """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. """ if repo.currentwlock() is None: msg = b"changing parents without holding the wlock" raise error.ProgrammingError(msg) if self._invalidated_context: msg = "trying to use an invalidated dirstate before it has reset" raise error.ProgrammingError(msg) self._parentwriters += 1 try: yield except Exception: self.invalidate() raise finally: if self._parentwriters > 0: if self._invalidated_context: # make sure we invalidate anything an upper context might # have changed. self.invalidate() self._parentwriters -= 1 # The invalidation is complete once we exit the final context # manager if self._parentwriters <= 0: assert self._parentwriters == 0 if self._invalidated_context: self._invalidated_context = False else: # When an exception occured, `_invalidated_context` # would have been set to True by the `invalidate` # call earlier. # # We don't have more straightforward code, because the # Exception catching (and the associated `invalidate` # calling) might have been called by a nested context # instead of the top level one. self.write(repo.currenttransaction()) # here to help migration to the new code def parentchange(self): msg = ( "Mercurial 6.4 and later requires call to " "`dirstate.changing_parents(repo)`" ) raise error.ProgrammingError(msg) 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, self._nodeconstants, self._use_dirstate_v2, ) 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. When sparse if disabled, return None. """ if self._sparsematchfn is None: return None # 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(b'branch') def _branch(self): try: return self._opener.read(b"branch").strip() or b"default" except FileNotFoundError: return b"default" @property def _pl(self): return self._map.parents() def hasdir(self, d): return self._map.hastrackeddir(d) @rootcache(b'.hgignore') def _ignore(self): files = self._ignorefiles() if not files: return matchmod.never() pats = [b'include:%s' % f for f in files] return matchmod.match(self._root, b'', [], pats, warn=self._ui.warn) @propertycache def _slash(self): return self._ui.configbool(b'ui', b'slash') and pycompat.ossep != b'/' @propertycache def _checklink(self): return util.checklink(self._root) @propertycache def _checkexec(self): return bool(util.checkexec(self._root)) @propertycache def _checkcase(self): return not util.fscasesensitive(self._join(b'.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): """build a callable that returns flags associated with a filename The information is extracted from three possible layers: 1. the file system if it supports the information 2. the "fallback" information stored in the dirstate if any 3. a more expensive mechanism inferring the flags from the parents. """ # small hack to cache the result of buildfallback() fallback_func = [] def get_flags(x): entry = None fallback_value = None try: st = os.lstat(self._join(x)) except OSError: return b'' if self._checklink: if util.statislink(st): return b'l' else: entry = self.get_entry(x) if entry.has_fallback_symlink: if entry.fallback_symlink: return b'l' else: if not fallback_func: fallback_func.append(buildfallback()) fallback_value = fallback_func[0](x) if b'l' in fallback_value: return b'l' if self._checkexec: if util.statisexec(st): return b'x' else: if entry is None: entry = self.get_entry(x) if entry.has_fallback_exec: if entry.fallback_exec: return b'x' else: if fallback_value is None: if not fallback_func: fallback_func.append(buildfallback()) fallback_value = fallback_func[0](x) if b'x' in fallback_value: return b'x' return b'' return get_flags @propertycache def _cwd(self): # internal config: ui.forcecwd forcecwd = self._ui.config(b'ui', b'forcecwd') if forcecwd: return forcecwd return encoding.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 b'' # 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 get_entry(self, path): """return a DirstateItem for the associated path""" entry = self._map.get(path) if entry is None: return DirstateItem() return entry def __contains__(self, key): return key in self._map def __iter__(self): return iter(sorted(self._map)) def items(self): return self._map.items() 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]) @property def in_merge(self): """True if a merge is in progress""" return self._pl[1] != self._nodeconstants.nullid def branch(self): return encoding.tolocal(self._branch) def setparents(self, p1, p2=None): """Set dirstate parents to p1 and p2. When moving from two parents to one, "merged" entries a adjusted to normal and previous copy records discarded and returned by the call. See localrepo.setparents() """ if p2 is None: p2 = self._nodeconstants.nullid if self._parentwriters == 0: raise ValueError( b"cannot set dirstate parent outside of " b"dirstate.changing_parents context manager" ) self._dirty = True oldp2 = self._pl[1] if self._origpl is None: self._origpl = self._pl nullid = self._nodeconstants.nullid # True if we need to fold p2 related state back to a linear case fold_p2 = oldp2 != nullid and p2 == nullid return self._map.setparents(p1, p2, fold_p2=fold_p2) def setbranch(self, branch): self.__class__._branch.set(self, encoding.fromlocal(branch)) f = self._opener(b'branch', b'w', atomictemp=True, checkambig=True) try: f.write(self._branch + b'\n') f.close() # make sure filecache has the correct stat info for _branch after # replacing the underlying file ce = self._filecache[b'_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 ("_map", "_branch", "_ignore"): if a in self.__dict__: delattr(self, a) self._dirty = False self._dirty_tracked_set = False self._invalidated_context = 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._check_sparse(source) self._map.copymap[dest] = source else: self._map.copymap.pop(dest, None) def copied(self, file): return self._map.copymap.get(file, None) def copies(self): return self._map.copymap @requires_not_changing_parents def set_tracked(self, filename, reset_copy=False): """a "public" method for generic code to mark a file as tracked This function is to be called outside of "update/merge" case. For example by a command like `hg add X`. if reset_copy is set, any existing copy information will be dropped. return True the file was previously untracked, False otherwise. """ self._dirty = True entry = self._map.get(filename) if entry is None or not entry.tracked: self._check_new_tracked_filename(filename) pre_tracked = self._map.set_tracked(filename) if reset_copy: self._map.copymap.pop(filename, None) if pre_tracked: self._dirty_tracked_set = True return pre_tracked @requires_not_changing_parents def set_untracked(self, filename): """a "public" method for generic code to mark a file as untracked This function is to be called outside of "update/merge" case. For example by a command like `hg remove X`. return True the file was previously tracked, False otherwise. """ ret = self._map.set_untracked(filename) if ret: self._dirty = True self._dirty_tracked_set = True return ret @requires_not_changing_parents def set_clean(self, filename, parentfiledata): """record that the current state of the file on disk is known to be clean""" self._dirty = True if not self._map[filename].tracked: self._check_new_tracked_filename(filename) (mode, size, mtime) = parentfiledata self._map.set_clean(filename, mode, size, mtime) @requires_not_changing_parents def set_possibly_dirty(self, filename): """record that the current state of the file on disk is unknown""" self._dirty = True self._map.set_possibly_dirty(filename) @requires_changing_parents def update_file_p1( self, filename, p1_tracked, ): """Set a file as tracked in the parent (or not) This is to be called when adjust the dirstate to a new parent after an history rewriting operation. It should not be called during a merge (p2 != nullid) and only within a `with dirstate.changing_parents(repo):` context. """ if self.in_merge: msg = b'update_file_reference should not be called when merging' raise error.ProgrammingError(msg) entry = self._map.get(filename) if entry is None: wc_tracked = False else: wc_tracked = entry.tracked if not (p1_tracked or wc_tracked): # the file is no longer relevant to anyone if self._map.get(filename) is not None: self._map.reset_state(filename) self._dirty = True elif (not p1_tracked) and wc_tracked: if entry is not None and entry.added: return # avoid dropping copy information (maybe?) self._map.reset_state( filename, wc_tracked, p1_tracked, # the underlying reference might have changed, we will have to # check it. has_meaningful_mtime=False, ) @requires_changing_parents def update_file( self, filename, wc_tracked, p1_tracked, p2_info=False, possibly_dirty=False, parentfiledata=None, ): """update the information about a file in the dirstate This is to be called when the direstates parent changes to keep track of what is the file situation in regards to the working copy and its parent. This function must be called within a `dirstate.changing_parents` context. note: the API is at an early stage and we might need to adjust it depending of what information ends up being relevant and useful to other processing. """ # note: I do not think we need to double check name clash here since we # are in a update/merge case that should already have taken care of # this. The test agrees self._dirty = True old_entry = self._map.get(filename) if old_entry is None: prev_tracked = False else: prev_tracked = old_entry.tracked if prev_tracked != wc_tracked: self._dirty_tracked_set = True self._map.reset_state( filename, wc_tracked, p1_tracked, p2_info=p2_info, has_meaningful_mtime=not possibly_dirty, parentfiledata=parentfiledata, ) def _check_new_tracked_filename(self, filename): scmutil.checkfilename(filename) if self._map.hastrackeddir(filename): msg = _(b'directory %r already in dirstate') msg %= pycompat.bytestr(filename) raise error.Abort(msg) # shadows for d in pathutil.finddirs(filename): if self._map.hastrackeddir(d): break entry = self._map.get(d) if entry is not None and not entry.removed: msg = _(b'file %r in dirstate clashes with %r') msg %= (pycompat.bytestr(d), pycompat.bytestr(filename)) raise error.Abort(msg) self._check_sparse(filename) def _check_sparse(self, filename): """Check that a filename is inside the sparse profile""" sparsematch = self._sparsematcher if sparsematch is not None and not sparsematch.always(): if not sparsematch(filename): msg = _(b"cannot add '%s' - it is outside the sparse checkout") hint = _( b'include file with `hg debugsparse --include <pattern>` or use ' b'`hg add -s <file>` to include file directory while adding' ) raise error.Abort(msg % filename, hint=hint) 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 b'/' in path: d, f = path.rsplit(b'/', 1) d = self._normalize(d, False, ignoremissing, None) folded = d + b"/" + f else: # No path components, preserve original case folded = path else: # recursively normalize leading directory components # against dirstate if b'/' in normed: d, f = normed.rsplit(b'/', 1) d = self._normalize(d, False, ignoremissing, True) r = self._root + b"/" + d folded = d + b"/" + 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._dirty = True def rebuild(self, parent, allfiles, changedfiles=None): matcher = self._sparsematcher if matcher is not None and not matcher.always(): # should not add non-matching files allfiles = [f for f in allfiles if matcher(f)] if changedfiles: changedfiles = [f for f in changedfiles if matcher(f)] if changedfiles is not None: # these files will be deleted from the dirstate when they are # not found to be in allfiles dirstatefilestoremove = {f for f in self if not matcher(f)} changedfiles = dirstatefilestoremove.union(changedfiles) if changedfiles is None: # Rebuild entire dirstate to_lookup = allfiles to_drop = [] self.clear() elif len(changedfiles) < 10: # Avoid turning allfiles into a set, which can be expensive if it's # large. to_lookup = [] to_drop = [] for f in changedfiles: if f in allfiles: to_lookup.append(f) else: to_drop.append(f) else: changedfilesset = set(changedfiles) to_lookup = changedfilesset & set(allfiles) to_drop = changedfilesset - to_lookup if self._origpl is None: self._origpl = self._pl self._map.setparents(parent, self._nodeconstants.nullid) for f in to_lookup: if self.in_merge: self.set_tracked(f) else: self._map.reset_state( f, wc_tracked=True, p1_tracked=True, ) for f in to_drop: self._map.reset_state(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 write_key = self._use_tracked_hint and self._dirty_tracked_set if tr: # delay writing in-memory changes out tr.addfilegenerator( b'dirstate-1-main', (self._filename,), lambda f: self._writedirstate(tr, f), location=b'plain', post_finalize=True, ) if write_key: tr.addfilegenerator( b'dirstate-2-key-post', (self._filename_th,), lambda f: self._write_tracked_hint(tr, f), location=b'plain', post_finalize=True, ) return file = lambda f: self._opener(f, b"w", atomictemp=True, checkambig=True) with file(self._filename) as f: self._writedirstate(tr, f) if write_key: # we update the key-file after writing to make sure reader have a # key that match the newly written content with file(self._filename_th) as f: self._write_tracked_hint(tr, f) def delete_tracked_hint(self): """remove the tracked_hint file To be used by format downgrades operation""" self._opener.unlink(self._filename_th) self._use_tracked_hint = False 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, tr, st): # notify callbacks about parents change if self._origpl is not None and self._origpl != self._pl: for c, callback in sorted(self._plchangecallbacks.items()): callback(self, self._origpl, self._pl) self._origpl = None self._map.write(tr, st) self._dirty = False self._dirty_tracked_set = False def _write_tracked_hint(self, tr, f): key = node.hex(uuid.uuid4().bytes) f.write(b"1\n%s\n" % key) # 1 is the format version def _dirignore(self, f): if self._ignore(f): return True for p in pathutil.finddirs(f): if self._ignore(p): return True return False def _ignorefiles(self): files = [] if os.path.exists(self._join(b'.hgignore')): files.append(self._join(b'.hgignore')) for name, path in self._ui.configitems(b"ui"): if name == b'ignore' or name.startswith(b'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, b'glob') if kind == b"subinclude": if p not in visited: files.append(p) continue m = matchmod.match( self._root, b'', [], [pattern], warn=self._ui.warn ) if m(f): return (i, lineno, line) visited.add(i) return (None, -1, b"") 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 = _(b'unknown') if stat.S_ISCHR(mode): kind = _(b'character device') elif stat.S_ISBLK(mode): kind = _(b'block device') elif stat.S_ISFIFO(mode): kind = _(b'fifo') elif stat.S_ISSOCK(mode): kind = _(b'socket') elif stat.S_ISDIR(mode): kind = _(b'directory') return _(b'unsupported file type (type is %s)') % kind 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] + b"/" 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 b'' in files: files = [b''] # constructing the foldmap is expensive, so don't do it for the # common case where files is [''] normalize = None results = dict.fromkeys(subrepos) results[b'.hg'] = None for ff in files: if normalize: 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 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): 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 == b'.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.items(): 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.items(): 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 if self._sparsematchfn is not None: em = matchmod.exact(match.files()) sm = matchmod.unionmatcher([self._sparsematcher, em]) match = matchmod.intersectmatchers(match, sm) 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) if matchtdir: for d in work: matchtdir(d[0]) for d in dirsnotfound: matchtdir(d) 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: tracing.counter('dirstate.walk work', len(work)) nd = work.pop() visitentries = match.visitchildrenset(nd) if not visitentries: continue if visitentries == b'this' or visitentries == b'all': visitentries = None skip = None if nd != b'': skip = b'.hg' try: with tracing.log('dirstate.walk.traverse listdir %s', nd): entries = listdir(join(nd), stat=True, skip=skip) except (PermissionError, FileNotFoundError) as inst: match.bad( self.pathto(nd), encoding.strtolocal(inst.strerror) ) continue for f, kind, st in entries: # Some matchers may return files in the visitentries set, # instead of 'this', if the matcher explicitly mentions them # and is not an exactmatcher. This is acceptable; we do not # make any hard assumptions about file-or-directory below # based on the presence of `f` in visitentries. If # visitchildrenset returned a set, we can always skip the # entries *not* in the set it provided regardless of whether # they're actually a file or a directory. if visitentries and f not in visitentries: continue 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 + b"/" + f) or f, True, True ) else: nf = nd and (nd + b"/" + 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[b'.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 _rust_status(self, matcher, list_clean, list_ignored, list_unknown): if self._sparsematchfn is not None: em = matchmod.exact(matcher.files()) sm = matchmod.unionmatcher([self._sparsematcher, em]) matcher = matchmod.intersectmatchers(matcher, sm) # Force Rayon (Rust parallelism library) to respect the number of # workers. This is a temporary workaround until Rust code knows # how to read the config file. numcpus = self._ui.configint(b"worker", b"numcpus") if numcpus is not None: encoding.environ.setdefault(b'RAYON_NUM_THREADS', b'%d' % numcpus) workers_enabled = self._ui.configbool(b"worker", b"enabled", True) if not workers_enabled: encoding.environ[b"RAYON_NUM_THREADS"] = b"1" ( lookup, modified, added, removed, deleted, clean, ignored, unknown, warnings, bad, traversed, dirty, ) = rustmod.status( self._map._map, matcher, self._rootdir, self._ignorefiles(), self._checkexec, bool(list_clean), bool(list_ignored), bool(list_unknown), bool(matcher.traversedir), ) self._dirty |= dirty if matcher.traversedir: for dir in traversed: matcher.traversedir(dir) if self._ui.warn: for item in warnings: if isinstance(item, tuple): file_path, syntax = item msg = _(b"%s: ignoring invalid syntax '%s'\n") % ( file_path, syntax, ) self._ui.warn(msg) else: msg = _(b"skipping unreadable pattern file '%s': %s\n") self._ui.warn( msg % ( pathutil.canonpath( self._rootdir, self._rootdir, item ), b"No such file or directory", ) ) for (fn, message) in bad: matcher.bad(fn, encoding.strtolocal(message)) status = scmutil.status( modified=modified, added=added, removed=removed, deleted=deleted, unknown=unknown, ignored=ignored, clean=clean, ) return (lookup, status) 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() use_rust = True allowed_matchers = ( matchmod.alwaysmatcher, matchmod.differencematcher, matchmod.exactmatcher, matchmod.includematcher, matchmod.intersectionmatcher, matchmod.nevermatcher, matchmod.unionmatcher, ) if rustmod is None: use_rust = False elif self._checkcase: # Case-insensitive filesystems are not handled yet use_rust = False elif subrepos: use_rust = False elif not isinstance(match, allowed_matchers): # Some matchers have yet to be implemented use_rust = False # Get the time from the filesystem so we can disambiguate files that # appear modified in the present or future. try: mtime_boundary = timestamp.get_fs_now(self._opener) except OSError: # In largefiles or readonly context mtime_boundary = None if use_rust: try: res = self._rust_status( match, listclean, listignored, listunknown ) return res + (mtime_boundary,) except rustmod.FallbackError: pass def noop(f): pass dcontains = dmap.__contains__ dget = dmap.__getitem__ ladd = lookup.append # aka "unsure" madd = modified.append aadd = added.append uadd = unknown.append if listunknown else noop iadd = ignored.append if listignored else noop radd = removed.append dadd = deleted.append cadd = clean.append if listclean else noop mexact = match.exact dirignore = self._dirignore checkexec = self._checkexec checklink = self._checklink copymap = self._map.copymap # 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 ).items(): if not dcontains(fn): if (listignored or mexact(fn)) and dirignore(fn): if listignored: iadd(fn) else: uadd(fn) continue t = dget(fn) mode = t.mode size = t.size if not st and t.tracked: dadd(fn) elif t.p2_info: madd(fn) elif t.added: aadd(fn) elif t.removed: radd(fn) elif t.tracked: if not checklink and t.has_fallback_symlink: # If the file system does not support symlink, the mode # might not be correctly stored in the dirstate, so do not # trust it. ladd(fn) elif not checkexec and t.has_fallback_exec: # If the file system does not support exec bits, the mode # might not be correctly stored in the dirstate, so do not # trust it. ladd(fn) elif ( size >= 0 and ( (size != st.st_size and size != st.st_size & _rangemask) or ((mode ^ st.st_mode) & 0o100 and checkexec) ) or fn in copymap ): if stat.S_ISLNK(st.st_mode) and size != st.st_size: # issue6456: Size returned may be longer due to # encryption on EXT-4 fscrypt, undecided. ladd(fn) else: madd(fn) elif not t.mtime_likely_equal_to(timestamp.mtime_of(st)): # There might be a change in the future if for example the # internal clock is off, but this is a case where the issues # the user would face would be a lot worse and there is # nothing we can really do. ladd(fn) elif listclean: cadd(fn) status = scmutil.status( modified, added, removed, deleted, unknown, ignored, clean ) return (lookup, status, mtime_boundary) def matches(self, match): """ return files in the dirstate (in whatever state) filtered by match """ dmap = self._map if rustmod is not None: dmap = self._map._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 data_backup_filename(self, backupname): if not self._use_dirstate_v2: return None return backupname + b'.v2-data' def _new_backup_data_filename(self, backupname): """return a filename to backup a data-file or None""" if not self._use_dirstate_v2: return None if self._map.docket.uuid is None: # not created yet, nothing to backup return None data_filename = self._map.docket.data_filename() return data_filename, self.data_backup_filename(backupname) def backup_data_file(self, backupname): if not self._use_dirstate_v2: return None docket = docketmod.DirstateDocket.parse( self._opener.read(backupname), self._nodeconstants, ) return self.data_backup_filename(backupname), docket.data_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: self._writedirstate( tr, self._opener(filename, b"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( b'dirstate-1-main', (self._filename,), lambda f: self._writedirstate(tr, f), location=b'plain', post_finalize=True, ) # 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=b'plain') self._opener.tryunlink(backupname) if self._opener.exists(filename): # 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, ) data_pair = self._new_backup_data_filename(backupname) if data_pair is not None: data_filename, bck_data_filename = data_pair util.copyfile( self._opener.join(data_filename), self._opener.join(bck_data_filename), hardlink=True, ) if tr is not None: # 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(bck_data_filename, location=b'plain') 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() o = self._opener if not o.exists(backupname): # there was no file backup, delete existing files filename = self._actualfilename(tr) data_file = None if self._use_dirstate_v2: data_file = self._map.docket.data_filename() if o.exists(filename): o.unlink(filename) if data_file is not None and o.exists(data_file): o.unlink(data_file) return filename = self._actualfilename(tr) data_pair = self.backup_data_file(backupname) if o.exists(filename) and util.samefile( o.join(backupname), o.join(filename) ): o.unlink(backupname) else: o.rename(backupname, filename, checkambig=True) if data_pair is not None: data_backup, target = data_pair if o.exists(target) and util.samefile( o.join(data_backup), o.join(target) ): o.unlink(data_backup) else: o.rename(data_backup, target, checkambig=True) def clearbackup(self, tr, backupname): '''Clear backup file''' o = self._opener if o.exists(backupname): data_backup = self.backup_data_file(backupname) o.unlink(backupname) if data_backup is not None: o.unlink(data_backup[0]) def verify(self, m1, m2, p1, narrow_matcher=None): """ check the dirstate contents against the parent manifest and yield errors """ missing_from_p1 = _( b"%s marked as tracked in p1 (%s) but not in manifest1\n" ) unexpected_in_p1 = _(b"%s marked as added, but also in manifest1\n") missing_from_ps = _( b"%s marked as modified, but not in either manifest\n" ) missing_from_ds = _( b"%s in manifest1, but not marked as tracked in p1 (%s)\n" ) for f, entry in self.items(): if entry.p1_tracked: if entry.modified and f not in m1 and f not in m2: yield missing_from_ps % f elif f not in m1: yield missing_from_p1 % (f, node.short(p1)) if entry.added and f in m1: yield unexpected_in_p1 % f for f in m1: if narrow_matcher is not None and not narrow_matcher(f): continue entry = self.get_entry(f) if not entry.p1_tracked: yield missing_from_ds % (f, node.short(p1))