Mercurial > hg
view mercurial/scmutil.py @ 28375:97cb1aeaca78
graphmod: refactor state handling
Move ASCII graph state to a dictionary, to clarify what is being tracked. Move
the 'seen' state (tracking currently active edges) into this structure.
author | Martijn Pieters <mjpieters@fb.com> |
---|---|
date | Fri, 04 Mar 2016 14:44:32 +0000 |
parents | 2ada62388bb1 |
children | 826d457df138 |
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# scmutil.py - Mercurial core utility functions # # Copyright 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 Queue import contextlib import errno import glob import os import re import shutil import stat import tempfile import threading from .i18n import _ from .node import wdirrev from . import ( encoding, error, match as matchmod, osutil, pathutil, phases, revset, similar, util, ) if os.name == 'nt': from . import scmwindows as scmplatform else: from . import scmposix as scmplatform systemrcpath = scmplatform.systemrcpath userrcpath = scmplatform.userrcpath class status(tuple): '''Named tuple with a list of files per status. The 'deleted', 'unknown' and 'ignored' properties are only relevant to the working copy. ''' __slots__ = () def __new__(cls, modified, added, removed, deleted, unknown, ignored, clean): return tuple.__new__(cls, (modified, added, removed, deleted, unknown, ignored, clean)) @property def modified(self): '''files that have been modified''' return self[0] @property def added(self): '''files that have been added''' return self[1] @property def removed(self): '''files that have been removed''' return self[2] @property def deleted(self): '''files that are in the dirstate, but have been deleted from the working copy (aka "missing") ''' return self[3] @property def unknown(self): '''files not in the dirstate that are not ignored''' return self[4] @property def ignored(self): '''files not in the dirstate that are ignored (by _dirignore())''' return self[5] @property def clean(self): '''files that have not been modified''' return self[6] def __repr__(self, *args, **kwargs): return (('<status modified=%r, added=%r, removed=%r, deleted=%r, ' 'unknown=%r, ignored=%r, clean=%r>') % self) def itersubrepos(ctx1, ctx2): """find subrepos in ctx1 or ctx2""" # Create a (subpath, ctx) mapping where we prefer subpaths from # ctx1. The subpaths from ctx2 are important when the .hgsub file # has been modified (in ctx2) but not yet committed (in ctx1). subpaths = dict.fromkeys(ctx2.substate, ctx2) subpaths.update(dict.fromkeys(ctx1.substate, ctx1)) missing = set() for subpath in ctx2.substate: if subpath not in ctx1.substate: del subpaths[subpath] missing.add(subpath) for subpath, ctx in sorted(subpaths.iteritems()): yield subpath, ctx.sub(subpath) # Yield an empty subrepo based on ctx1 for anything only in ctx2. That way, # status and diff will have an accurate result when it does # 'sub.{status|diff}(rev2)'. Otherwise, the ctx2 subrepo is compared # against itself. for subpath in missing: yield subpath, ctx2.nullsub(subpath, ctx1) def nochangesfound(ui, repo, excluded=None): '''Report no changes for push/pull, excluded is None or a list of nodes excluded from the push/pull. ''' secretlist = [] if excluded: for n in excluded: if n not in repo: # discovery should not have included the filtered revision, # we have to explicitly exclude it until discovery is cleanup. continue ctx = repo[n] if ctx.phase() >= phases.secret and not ctx.extinct(): secretlist.append(n) if secretlist: ui.status(_("no changes found (ignored %d secret changesets)\n") % len(secretlist)) else: ui.status(_("no changes found\n")) def checknewlabel(repo, lbl, kind): # Do not use the "kind" parameter in ui output. # It makes strings difficult to translate. if lbl in ['tip', '.', 'null']: raise error.Abort(_("the name '%s' is reserved") % lbl) for c in (':', '\0', '\n', '\r'): if c in lbl: raise error.Abort(_("%r cannot be used in a name") % c) try: int(lbl) raise error.Abort(_("cannot use an integer as a name")) except ValueError: pass def checkfilename(f): '''Check that the filename f is an acceptable filename for a tracked file''' if '\r' in f or '\n' in f: raise error.Abort(_("'\\n' and '\\r' disallowed in filenames: %r") % f) def checkportable(ui, f): '''Check if filename f is portable and warn or abort depending on config''' checkfilename(f) abort, warn = checkportabilityalert(ui) if abort or warn: msg = util.checkwinfilename(f) if msg: msg = "%s: %r" % (msg, f) if abort: raise error.Abort(msg) ui.warn(_("warning: %s\n") % msg) def checkportabilityalert(ui): '''check if the user's config requests nothing, a warning, or abort for non-portable filenames''' val = ui.config('ui', 'portablefilenames', 'warn') lval = val.lower() bval = util.parsebool(val) abort = os.name == 'nt' or lval == 'abort' warn = bval or lval == 'warn' if bval is None and not (warn or abort or lval == 'ignore'): raise error.ConfigError( _("ui.portablefilenames value is invalid ('%s')") % val) return abort, warn class casecollisionauditor(object): def __init__(self, ui, abort, dirstate): self._ui = ui self._abort = abort allfiles = '\0'.join(dirstate._map) self._loweredfiles = set(encoding.lower(allfiles).split('\0')) self._dirstate = dirstate # The purpose of _newfiles is so that we don't complain about # case collisions if someone were to call this object with the # same filename twice. self._newfiles = set() def __call__(self, f): if f in self._newfiles: return fl = encoding.lower(f) if fl in self._loweredfiles and f not in self._dirstate: msg = _('possible case-folding collision for %s') % f if self._abort: raise error.Abort(msg) self._ui.warn(_("warning: %s\n") % msg) self._loweredfiles.add(fl) self._newfiles.add(f) def filteredhash(repo, maxrev): """build hash of filtered revisions in the current repoview. Multiple caches perform up-to-date validation by checking that the tiprev and tipnode stored in the cache file match the current repository. However, this is not sufficient for validating repoviews because the set of revisions in the view may change without the repository tiprev and tipnode changing. This function hashes all the revs filtered from the view and returns that SHA-1 digest. """ cl = repo.changelog if not cl.filteredrevs: return None key = None revs = sorted(r for r in cl.filteredrevs if r <= maxrev) if revs: s = util.sha1() for rev in revs: s.update('%s;' % rev) key = s.digest() return key class abstractvfs(object): """Abstract base class; cannot be instantiated""" def __init__(self, *args, **kwargs): '''Prevent instantiation; don't call this from subclasses.''' raise NotImplementedError('attempted instantiating ' + str(type(self))) def tryread(self, path): '''gracefully return an empty string for missing files''' try: return self.read(path) except IOError as inst: if inst.errno != errno.ENOENT: raise return "" def tryreadlines(self, path, mode='rb'): '''gracefully return an empty array for missing files''' try: return self.readlines(path, mode=mode) except IOError as inst: if inst.errno != errno.ENOENT: raise return [] def open(self, path, mode="r", text=False, atomictemp=False, notindexed=False, backgroundclose=False): '''Open ``path`` file, which is relative to vfs root. Newly created directories are marked as "not to be indexed by the content indexing service", if ``notindexed`` is specified for "write" mode access. ''' self.open = self.__call__ return self.__call__(path, mode, text, atomictemp, notindexed, backgroundclose=backgroundclose) def read(self, path): with self(path, 'rb') as fp: return fp.read() def readlines(self, path, mode='rb'): with self(path, mode=mode) as fp: return fp.readlines() def write(self, path, data, backgroundclose=False): with self(path, 'wb', backgroundclose=backgroundclose) as fp: return fp.write(data) def writelines(self, path, data, mode='wb', notindexed=False): with self(path, mode=mode, notindexed=notindexed) as fp: return fp.writelines(data) def append(self, path, data): with self(path, 'ab') as fp: return fp.write(data) def basename(self, path): """return base element of a path (as os.path.basename would do) This exists to allow handling of strange encoding if needed.""" return os.path.basename(path) def chmod(self, path, mode): return os.chmod(self.join(path), mode) def dirname(self, path): """return dirname element of a path (as os.path.dirname would do) This exists to allow handling of strange encoding if needed.""" return os.path.dirname(path) def exists(self, path=None): return os.path.exists(self.join(path)) def fstat(self, fp): return util.fstat(fp) def isdir(self, path=None): return os.path.isdir(self.join(path)) def isfile(self, path=None): return os.path.isfile(self.join(path)) def islink(self, path=None): return os.path.islink(self.join(path)) def isfileorlink(self, path=None): '''return whether path is a regular file or a symlink Unlike isfile, this doesn't follow symlinks.''' try: st = self.lstat(path) except OSError: return False mode = st.st_mode return stat.S_ISREG(mode) or stat.S_ISLNK(mode) def reljoin(self, *paths): """join various elements of a path together (as os.path.join would do) The vfs base is not injected so that path stay relative. This exists to allow handling of strange encoding if needed.""" return os.path.join(*paths) def split(self, path): """split top-most element of a path (as os.path.split would do) This exists to allow handling of strange encoding if needed.""" return os.path.split(path) def lexists(self, path=None): return os.path.lexists(self.join(path)) def lstat(self, path=None): return os.lstat(self.join(path)) def listdir(self, path=None): return os.listdir(self.join(path)) def makedir(self, path=None, notindexed=True): return util.makedir(self.join(path), notindexed) def makedirs(self, path=None, mode=None): return util.makedirs(self.join(path), mode) def makelock(self, info, path): return util.makelock(info, self.join(path)) def mkdir(self, path=None): return os.mkdir(self.join(path)) def mkstemp(self, suffix='', prefix='tmp', dir=None, text=False): fd, name = tempfile.mkstemp(suffix=suffix, prefix=prefix, dir=self.join(dir), text=text) dname, fname = util.split(name) if dir: return fd, os.path.join(dir, fname) else: return fd, fname def readdir(self, path=None, stat=None, skip=None): return osutil.listdir(self.join(path), stat, skip) def readlock(self, path): return util.readlock(self.join(path)) def rename(self, src, dst): return util.rename(self.join(src), self.join(dst)) def readlink(self, path): return os.readlink(self.join(path)) def removedirs(self, path=None): """Remove a leaf directory and all empty intermediate ones """ return util.removedirs(self.join(path)) def rmtree(self, path=None, ignore_errors=False, forcibly=False): """Remove a directory tree recursively If ``forcibly``, this tries to remove READ-ONLY files, too. """ if forcibly: def onerror(function, path, excinfo): if function is not os.remove: raise # read-only files cannot be unlinked under Windows s = os.stat(path) if (s.st_mode & stat.S_IWRITE) != 0: raise os.chmod(path, stat.S_IMODE(s.st_mode) | stat.S_IWRITE) os.remove(path) else: onerror = None return shutil.rmtree(self.join(path), ignore_errors=ignore_errors, onerror=onerror) def setflags(self, path, l, x): return util.setflags(self.join(path), l, x) def stat(self, path=None): return os.stat(self.join(path)) def unlink(self, path=None): return util.unlink(self.join(path)) def unlinkpath(self, path=None, ignoremissing=False): return util.unlinkpath(self.join(path), ignoremissing) def utime(self, path=None, t=None): return os.utime(self.join(path), t) def walk(self, path=None, onerror=None): """Yield (dirpath, dirs, files) tuple for each directories under path ``dirpath`` is relative one from the root of this vfs. This uses ``os.sep`` as path separator, even you specify POSIX style ``path``. "The root of this vfs" is represented as empty ``dirpath``. """ root = os.path.normpath(self.join(None)) # when dirpath == root, dirpath[prefixlen:] becomes empty # because len(dirpath) < prefixlen. prefixlen = len(pathutil.normasprefix(root)) for dirpath, dirs, files in os.walk(self.join(path), onerror=onerror): yield (dirpath[prefixlen:], dirs, files) @contextlib.contextmanager def backgroundclosing(self, ui, expectedcount=-1): """Allow files to be closed asynchronously. When this context manager is active, ``backgroundclose`` can be passed to ``__call__``/``open`` to result in the file possibly being closed asynchronously, on a background thread. """ # This is an arbitrary restriction and could be changed if we ever # have a use case. vfs = getattr(self, 'vfs', self) if getattr(vfs, '_backgroundfilecloser', None): raise error.Abort('can only have 1 active background file closer') with backgroundfilecloser(ui, expectedcount=expectedcount) as bfc: try: vfs._backgroundfilecloser = bfc yield bfc finally: vfs._backgroundfilecloser = None class vfs(abstractvfs): '''Operate files relative to a base directory This class is used to hide the details of COW semantics and remote file access from higher level code. ''' def __init__(self, base, audit=True, expandpath=False, realpath=False): if expandpath: base = util.expandpath(base) if realpath: base = os.path.realpath(base) self.base = base self.mustaudit = audit self.createmode = None self._trustnlink = None @property def mustaudit(self): return self._audit @mustaudit.setter def mustaudit(self, onoff): self._audit = onoff if onoff: self.audit = pathutil.pathauditor(self.base) else: self.audit = util.always @util.propertycache def _cansymlink(self): return util.checklink(self.base) @util.propertycache def _chmod(self): return util.checkexec(self.base) def _fixfilemode(self, name): if self.createmode is None or not self._chmod: return os.chmod(name, self.createmode & 0o666) def __call__(self, path, mode="r", text=False, atomictemp=False, notindexed=False, backgroundclose=False): '''Open ``path`` file, which is relative to vfs root. Newly created directories are marked as "not to be indexed by the content indexing service", if ``notindexed`` is specified for "write" mode access. If ``backgroundclose`` is passed, the file may be closed asynchronously. It can only be used if the ``self.backgroundclosing()`` context manager is active. This should only be specified if the following criteria hold: 1. There is a potential for writing thousands of files. Unless you are writing thousands of files, the performance benefits of asynchronously closing files is not realized. 2. Files are opened exactly once for the ``backgroundclosing`` active duration and are therefore free of race conditions between closing a file on a background thread and reopening it. (If the file were opened multiple times, there could be unflushed data because the original file handle hasn't been flushed/closed yet.) ''' if self._audit: r = util.checkosfilename(path) if r: raise error.Abort("%s: %r" % (r, path)) self.audit(path) f = self.join(path) if not text and "b" not in mode: mode += "b" # for that other OS nlink = -1 if mode not in ('r', 'rb'): dirname, basename = util.split(f) # If basename is empty, then the path is malformed because it points # to a directory. Let the posixfile() call below raise IOError. if basename: if atomictemp: util.ensuredirs(dirname, self.createmode, notindexed) return util.atomictempfile(f, mode, self.createmode) try: if 'w' in mode: util.unlink(f) nlink = 0 else: # nlinks() may behave differently for files on Windows # shares if the file is open. with util.posixfile(f): nlink = util.nlinks(f) if nlink < 1: nlink = 2 # force mktempcopy (issue1922) except (OSError, IOError) as e: if e.errno != errno.ENOENT: raise nlink = 0 util.ensuredirs(dirname, self.createmode, notindexed) if nlink > 0: if self._trustnlink is None: self._trustnlink = nlink > 1 or util.checknlink(f) if nlink > 1 or not self._trustnlink: util.rename(util.mktempcopy(f), f) fp = util.posixfile(f, mode) if nlink == 0: self._fixfilemode(f) if backgroundclose: if not self._backgroundfilecloser: raise error.Abort('backgroundclose can only be used when a ' 'backgroundclosing context manager is active') fp = delayclosedfile(fp, self._backgroundfilecloser) return fp def symlink(self, src, dst): self.audit(dst) linkname = self.join(dst) try: os.unlink(linkname) except OSError: pass util.ensuredirs(os.path.dirname(linkname), self.createmode) if self._cansymlink: try: os.symlink(src, linkname) except OSError as err: raise OSError(err.errno, _('could not symlink to %r: %s') % (src, err.strerror), linkname) else: self.write(dst, src) def join(self, path, *insidef): if path: return os.path.join(self.base, path, *insidef) else: return self.base opener = vfs class auditvfs(object): def __init__(self, vfs): self.vfs = vfs @property def mustaudit(self): return self.vfs.mustaudit @mustaudit.setter def mustaudit(self, onoff): self.vfs.mustaudit = onoff class filtervfs(abstractvfs, auditvfs): '''Wrapper vfs for filtering filenames with a function.''' def __init__(self, vfs, filter): auditvfs.__init__(self, vfs) self._filter = filter def __call__(self, path, *args, **kwargs): return self.vfs(self._filter(path), *args, **kwargs) def join(self, path, *insidef): if path: return self.vfs.join(self._filter(self.vfs.reljoin(path, *insidef))) else: return self.vfs.join(path) filteropener = filtervfs class readonlyvfs(abstractvfs, auditvfs): '''Wrapper vfs preventing any writing.''' def __init__(self, vfs): auditvfs.__init__(self, vfs) def __call__(self, path, mode='r', *args, **kw): if mode not in ('r', 'rb'): raise error.Abort('this vfs is read only') return self.vfs(path, mode, *args, **kw) def join(self, path, *insidef): return self.vfs.join(path, *insidef) def walkrepos(path, followsym=False, seen_dirs=None, recurse=False): '''yield every hg repository under path, always recursively. The recurse flag will only control recursion into repo working dirs''' def errhandler(err): if err.filename == path: raise err samestat = getattr(os.path, 'samestat', None) if followsym and samestat is not None: def adddir(dirlst, dirname): match = False dirstat = os.stat(dirname) for lstdirstat in dirlst: if samestat(dirstat, lstdirstat): match = True break if not match: dirlst.append(dirstat) return not match else: followsym = False if (seen_dirs is None) and followsym: seen_dirs = [] adddir(seen_dirs, path) for root, dirs, files in os.walk(path, topdown=True, onerror=errhandler): dirs.sort() if '.hg' in dirs: yield root # found a repository qroot = os.path.join(root, '.hg', 'patches') if os.path.isdir(os.path.join(qroot, '.hg')): yield qroot # we have a patch queue repo here if recurse: # avoid recursing inside the .hg directory dirs.remove('.hg') else: dirs[:] = [] # don't descend further elif followsym: newdirs = [] for d in dirs: fname = os.path.join(root, d) if adddir(seen_dirs, fname): if os.path.islink(fname): for hgname in walkrepos(fname, True, seen_dirs): yield hgname else: newdirs.append(d) dirs[:] = newdirs def osrcpath(): '''return default os-specific hgrc search path''' path = [] defaultpath = os.path.join(util.datapath, 'default.d') if os.path.isdir(defaultpath): for f, kind in osutil.listdir(defaultpath): if f.endswith('.rc'): path.append(os.path.join(defaultpath, f)) path.extend(systemrcpath()) path.extend(userrcpath()) path = [os.path.normpath(f) for f in path] return path _rcpath = None def rcpath(): '''return hgrc search path. if env var HGRCPATH is set, use it. for each item in path, if directory, use files ending in .rc, else use item. make HGRCPATH empty to only look in .hg/hgrc of current repo. if no HGRCPATH, use default os-specific path.''' global _rcpath if _rcpath is None: if 'HGRCPATH' in os.environ: _rcpath = [] for p in os.environ['HGRCPATH'].split(os.pathsep): if not p: continue p = util.expandpath(p) if os.path.isdir(p): for f, kind in osutil.listdir(p): if f.endswith('.rc'): _rcpath.append(os.path.join(p, f)) else: _rcpath.append(p) else: _rcpath = osrcpath() return _rcpath def intrev(rev): """Return integer for a given revision that can be used in comparison or arithmetic operation""" if rev is None: return wdirrev return rev def revsingle(repo, revspec, default='.'): if not revspec and revspec != 0: return repo[default] l = revrange(repo, [revspec]) if not l: raise error.Abort(_('empty revision set')) return repo[l.last()] def _pairspec(revspec): tree = revset.parse(revspec) tree = revset.optimize(tree, True)[1] # fix up "x^:y" -> "(x^):y" return tree and tree[0] in ('range', 'rangepre', 'rangepost', 'rangeall') def revpair(repo, revs): if not revs: return repo.dirstate.p1(), None l = revrange(repo, revs) if not l: first = second = None elif l.isascending(): first = l.min() second = l.max() elif l.isdescending(): first = l.max() second = l.min() else: first = l.first() second = l.last() if first is None: raise error.Abort(_('empty revision range')) if (first == second and len(revs) >= 2 and not all(revrange(repo, [r]) for r in revs)): raise error.Abort(_('empty revision on one side of range')) # if top-level is range expression, the result must always be a pair if first == second and len(revs) == 1 and not _pairspec(revs[0]): return repo.lookup(first), None return repo.lookup(first), repo.lookup(second) def revrange(repo, revs): """Yield revision as strings from a list of revision specifications.""" allspecs = [] for spec in revs: if isinstance(spec, int): spec = revset.formatspec('rev(%d)', spec) allspecs.append(spec) m = revset.matchany(repo.ui, allspecs, repo) return m(repo) def meaningfulparents(repo, ctx): """Return list of meaningful (or all if debug) parentrevs for rev. For merges (two non-nullrev revisions) both parents are meaningful. Otherwise the first parent revision is considered meaningful if it is not the preceding revision. """ parents = ctx.parents() if len(parents) > 1: return parents if repo.ui.debugflag: return [parents[0], repo['null']] if parents[0].rev() >= intrev(ctx.rev()) - 1: return [] return parents def expandpats(pats): '''Expand bare globs when running on windows. On posix we assume it already has already been done by sh.''' if not util.expandglobs: return list(pats) ret = [] for kindpat in pats: kind, pat = matchmod._patsplit(kindpat, None) if kind is None: try: globbed = glob.glob(pat) except re.error: globbed = [pat] if globbed: ret.extend(globbed) continue ret.append(kindpat) return ret def matchandpats(ctx, pats=(), opts=None, globbed=False, default='relpath', badfn=None): '''Return a matcher and the patterns that were used. The matcher will warn about bad matches, unless an alternate badfn callback is provided.''' if pats == ("",): pats = [] if opts is None: opts = {} if not globbed and default == 'relpath': pats = expandpats(pats or []) def bad(f, msg): ctx.repo().ui.warn("%s: %s\n" % (m.rel(f), msg)) if badfn is None: badfn = bad m = ctx.match(pats, opts.get('include'), opts.get('exclude'), default, listsubrepos=opts.get('subrepos'), badfn=badfn) if m.always(): pats = [] return m, pats def match(ctx, pats=(), opts=None, globbed=False, default='relpath', badfn=None): '''Return a matcher that will warn about bad matches.''' return matchandpats(ctx, pats, opts, globbed, default, badfn=badfn)[0] def matchall(repo): '''Return a matcher that will efficiently match everything.''' return matchmod.always(repo.root, repo.getcwd()) def matchfiles(repo, files, badfn=None): '''Return a matcher that will efficiently match exactly these files.''' return matchmod.exact(repo.root, repo.getcwd(), files, badfn=badfn) def origpath(ui, repo, filepath): '''customize where .orig files are created Fetch user defined path from config file: [ui] origbackuppath = <path> Fall back to default (filepath) if not specified ''' origbackuppath = ui.config('ui', 'origbackuppath', None) if origbackuppath is None: return filepath + ".orig" filepathfromroot = os.path.relpath(filepath, start=repo.root) fullorigpath = repo.wjoin(origbackuppath, filepathfromroot) origbackupdir = repo.vfs.dirname(fullorigpath) if not repo.vfs.exists(origbackupdir): ui.note(_('creating directory: %s\n') % origbackupdir) util.makedirs(origbackupdir) return fullorigpath + ".orig" def addremove(repo, matcher, prefix, opts=None, dry_run=None, similarity=None): if opts is None: opts = {} m = matcher if dry_run is None: dry_run = opts.get('dry_run') if similarity is None: similarity = float(opts.get('similarity') or 0) ret = 0 join = lambda f: os.path.join(prefix, f) def matchessubrepo(matcher, subpath): if matcher.exact(subpath): return True for f in matcher.files(): if f.startswith(subpath): return True return False wctx = repo[None] for subpath in sorted(wctx.substate): if opts.get('subrepos') or matchessubrepo(m, subpath): sub = wctx.sub(subpath) try: submatch = matchmod.subdirmatcher(subpath, m) if sub.addremove(submatch, prefix, opts, dry_run, similarity): ret = 1 except error.LookupError: repo.ui.status(_("skipping missing subrepository: %s\n") % join(subpath)) rejected = [] def badfn(f, msg): if f in m.files(): m.bad(f, msg) rejected.append(f) badmatch = matchmod.badmatch(m, badfn) added, unknown, deleted, removed, forgotten = _interestingfiles(repo, badmatch) unknownset = set(unknown + forgotten) toprint = unknownset.copy() toprint.update(deleted) for abs in sorted(toprint): if repo.ui.verbose or not m.exact(abs): if abs in unknownset: status = _('adding %s\n') % m.uipath(abs) else: status = _('removing %s\n') % m.uipath(abs) repo.ui.status(status) renames = _findrenames(repo, m, added + unknown, removed + deleted, similarity) if not dry_run: _markchanges(repo, unknown + forgotten, deleted, renames) for f in rejected: if f in m.files(): return 1 return ret def marktouched(repo, files, similarity=0.0): '''Assert that files have somehow been operated upon. files are relative to the repo root.''' m = matchfiles(repo, files, badfn=lambda x, y: rejected.append(x)) rejected = [] added, unknown, deleted, removed, forgotten = _interestingfiles(repo, m) if repo.ui.verbose: unknownset = set(unknown + forgotten) toprint = unknownset.copy() toprint.update(deleted) for abs in sorted(toprint): if abs in unknownset: status = _('adding %s\n') % abs else: status = _('removing %s\n') % abs repo.ui.status(status) renames = _findrenames(repo, m, added + unknown, removed + deleted, similarity) _markchanges(repo, unknown + forgotten, deleted, renames) for f in rejected: if f in m.files(): return 1 return 0 def _interestingfiles(repo, matcher): '''Walk dirstate with matcher, looking for files that addremove would care about. This is different from dirstate.status because it doesn't care about whether files are modified or clean.''' added, unknown, deleted, removed, forgotten = [], [], [], [], [] audit_path = pathutil.pathauditor(repo.root) ctx = repo[None] dirstate = repo.dirstate walkresults = dirstate.walk(matcher, sorted(ctx.substate), True, False, full=False) for abs, st in walkresults.iteritems(): dstate = dirstate[abs] if dstate == '?' and audit_path.check(abs): unknown.append(abs) elif dstate != 'r' and not st: deleted.append(abs) elif dstate == 'r' and st: forgotten.append(abs) # for finding renames elif dstate == 'r' and not st: removed.append(abs) elif dstate == 'a': added.append(abs) return added, unknown, deleted, removed, forgotten def _findrenames(repo, matcher, added, removed, similarity): '''Find renames from removed files to added ones.''' renames = {} if similarity > 0: for old, new, score in similar.findrenames(repo, added, removed, similarity): if (repo.ui.verbose or not matcher.exact(old) or not matcher.exact(new)): repo.ui.status(_('recording removal of %s as rename to %s ' '(%d%% similar)\n') % (matcher.rel(old), matcher.rel(new), score * 100)) renames[new] = old return renames def _markchanges(repo, unknown, deleted, renames): '''Marks the files in unknown as added, the files in deleted as removed, and the files in renames as copied.''' wctx = repo[None] with repo.wlock(): wctx.forget(deleted) wctx.add(unknown) for new, old in renames.iteritems(): wctx.copy(old, new) def dirstatecopy(ui, repo, wctx, src, dst, dryrun=False, cwd=None): """Update the dirstate to reflect the intent of copying src to dst. For different reasons it might not end with dst being marked as copied from src. """ origsrc = repo.dirstate.copied(src) or src if dst == origsrc: # copying back a copy? if repo.dirstate[dst] not in 'mn' and not dryrun: repo.dirstate.normallookup(dst) else: if repo.dirstate[origsrc] == 'a' and origsrc == src: if not ui.quiet: ui.warn(_("%s has not been committed yet, so no copy " "data will be stored for %s.\n") % (repo.pathto(origsrc, cwd), repo.pathto(dst, cwd))) if repo.dirstate[dst] in '?r' and not dryrun: wctx.add([dst]) elif not dryrun: wctx.copy(origsrc, dst) def readrequires(opener, supported): '''Reads and parses .hg/requires and checks if all entries found are in the list of supported features.''' requirements = set(opener.read("requires").splitlines()) missings = [] for r in requirements: if r not in supported: if not r or not r[0].isalnum(): raise error.RequirementError(_(".hg/requires file is corrupt")) missings.append(r) missings.sort() if missings: raise error.RequirementError( _("repository requires features unknown to this Mercurial: %s") % " ".join(missings), hint=_("see https://mercurial-scm.org/wiki/MissingRequirement" " for more information")) return requirements def writerequires(opener, requirements): with opener('requires', 'w') as fp: for r in sorted(requirements): fp.write("%s\n" % r) class filecachesubentry(object): def __init__(self, path, stat): self.path = path self.cachestat = None self._cacheable = None if stat: self.cachestat = filecachesubentry.stat(self.path) if self.cachestat: self._cacheable = self.cachestat.cacheable() else: # None means we don't know yet self._cacheable = None def refresh(self): if self.cacheable(): self.cachestat = filecachesubentry.stat(self.path) def cacheable(self): if self._cacheable is not None: return self._cacheable # we don't know yet, assume it is for now return True def changed(self): # no point in going further if we can't cache it if not self.cacheable(): return True newstat = filecachesubentry.stat(self.path) # we may not know if it's cacheable yet, check again now if newstat and self._cacheable is None: self._cacheable = newstat.cacheable() # check again if not self._cacheable: return True if self.cachestat != newstat: self.cachestat = newstat return True else: return False @staticmethod def stat(path): try: return util.cachestat(path) except OSError as e: if e.errno != errno.ENOENT: raise class filecacheentry(object): def __init__(self, paths, stat=True): self._entries = [] for path in paths: self._entries.append(filecachesubentry(path, stat)) def changed(self): '''true if any entry has changed''' for entry in self._entries: if entry.changed(): return True return False def refresh(self): for entry in self._entries: entry.refresh() class filecache(object): '''A property like decorator that tracks files under .hg/ for updates. Records stat info when called in _filecache. On subsequent calls, compares old stat info with new info, and recreates the object when any of the files changes, updating the new stat info in _filecache. Mercurial either atomic renames or appends for files under .hg, so to ensure the cache is reliable we need the filesystem to be able to tell us if a file has been replaced. If it can't, we fallback to recreating the object on every call (essentially the same behavior as propertycache). ''' def __init__(self, *paths): self.paths = paths def join(self, obj, fname): """Used to compute the runtime path of a cached file. Users should subclass filecache and provide their own version of this function to call the appropriate join function on 'obj' (an instance of the class that its member function was decorated). """ return obj.join(fname) def __call__(self, func): self.func = func self.name = func.__name__ return self def __get__(self, obj, type=None): # do we need to check if the file changed? if self.name in obj.__dict__: assert self.name in obj._filecache, self.name return obj.__dict__[self.name] entry = obj._filecache.get(self.name) if entry: if entry.changed(): entry.obj = self.func(obj) else: paths = [self.join(obj, path) for path in self.paths] # We stat -before- creating the object so our cache doesn't lie if # a writer modified between the time we read and stat entry = filecacheentry(paths, True) entry.obj = self.func(obj) obj._filecache[self.name] = entry obj.__dict__[self.name] = entry.obj return entry.obj def __set__(self, obj, value): if self.name not in obj._filecache: # we add an entry for the missing value because X in __dict__ # implies X in _filecache paths = [self.join(obj, path) for path in self.paths] ce = filecacheentry(paths, False) obj._filecache[self.name] = ce else: ce = obj._filecache[self.name] ce.obj = value # update cached copy obj.__dict__[self.name] = value # update copy returned by obj.x def __delete__(self, obj): try: del obj.__dict__[self.name] except KeyError: raise AttributeError(self.name) def _locksub(repo, lock, envvar, cmd, environ=None, *args, **kwargs): if lock is None: raise error.LockInheritanceContractViolation( 'lock can only be inherited while held') if environ is None: environ = {} with lock.inherit() as locker: environ[envvar] = locker return repo.ui.system(cmd, environ=environ, *args, **kwargs) def wlocksub(repo, cmd, *args, **kwargs): """run cmd as a subprocess that allows inheriting repo's wlock This can only be called while the wlock is held. This takes all the arguments that ui.system does, and returns the exit code of the subprocess.""" return _locksub(repo, repo.currentwlock(), 'HG_WLOCK_LOCKER', cmd, *args, **kwargs) def gdinitconfig(ui): """helper function to know if a repo should be created as general delta """ # experimental config: format.generaldelta return (ui.configbool('format', 'generaldelta', False) or ui.configbool('format', 'usegeneraldelta', True)) def gddeltaconfig(ui): """helper function to know if incoming delta should be optimised """ # experimental config: format.generaldelta return ui.configbool('format', 'generaldelta', False) class delayclosedfile(object): """Proxy for a file object whose close is delayed. Do not instantiate outside of the vfs layer. """ def __init__(self, fh, closer): object.__setattr__(self, '_origfh', fh) object.__setattr__(self, '_closer', closer) def __getattr__(self, attr): return getattr(self._origfh, attr) def __setattr__(self, attr, value): return setattr(self._origfh, attr, value) def __delattr__(self, attr): return delattr(self._origfh, attr) def __enter__(self): return self._origfh.__enter__() def __exit__(self, exc_type, exc_value, exc_tb): self._closer.close(self._origfh) def close(self): self._closer.close(self._origfh) class backgroundfilecloser(object): """Coordinates background closing of file handles on multiple threads.""" def __init__(self, ui, expectedcount=-1): self._running = False self._entered = False self._threads = [] self._threadexception = None # Only Windows/NTFS has slow file closing. So only enable by default # on that platform. But allow to be enabled elsewhere for testing. defaultenabled = os.name == 'nt' enabled = ui.configbool('worker', 'backgroundclose', defaultenabled) if not enabled: return # There is overhead to starting and stopping the background threads. # Don't do background processing unless the file count is large enough # to justify it. minfilecount = ui.configint('worker', 'backgroundcloseminfilecount', 2048) # FUTURE dynamically start background threads after minfilecount closes. # (We don't currently have any callers that don't know their file count) if expectedcount > 0 and expectedcount < minfilecount: return # Windows defaults to a limit of 512 open files. A buffer of 128 # should give us enough headway. maxqueue = ui.configint('worker', 'backgroundclosemaxqueue', 384) threadcount = ui.configint('worker', 'backgroundclosethreadcount', 4) ui.debug('starting %d threads for background file closing\n' % threadcount) self._queue = Queue.Queue(maxsize=maxqueue) self._running = True for i in range(threadcount): t = threading.Thread(target=self._worker, name='backgroundcloser') self._threads.append(t) t.start() def __enter__(self): self._entered = True return self def __exit__(self, exc_type, exc_value, exc_tb): self._running = False # Wait for threads to finish closing so open files don't linger for # longer than lifetime of context manager. for t in self._threads: t.join() def _worker(self): """Main routine for worker thread.""" while True: try: fh = self._queue.get(block=True, timeout=0.100) # Need to catch or the thread will terminate and # we could orphan file descriptors. try: fh.close() except Exception as e: # Stash so can re-raise from main thread later. self._threadexception = e except Queue.Empty: if not self._running: break def close(self, fh): """Schedule a file for closing.""" if not self._entered: raise error.Abort('can only call close() when context manager ' 'active') # If a background thread encountered an exception, raise now so we fail # fast. Otherwise we may potentially go on for minutes until the error # is acted on. if self._threadexception: e = self._threadexception self._threadexception = None raise e # If we're not actively running, close synchronously. if not self._running: fh.close() return self._queue.put(fh, block=True, timeout=None)