branch: avoid using reserved tag names

Reported as Debian bug  #552423.

mercurial/changelog.py

@@ -1,228 +1,233 b''
 # changelog.py - changelog class for mercurial
 #
 # Copyright 2005-2007 Matt Mackall <[e-mail]>
 #
 # 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 bin, hex, nullid
 from i18n import _
 import util, error, revlog, encoding
 
 def _string_escape(text):
     """
     >>> d = {'nl': chr(10), 'bs': chr(92), 'cr': chr(13), 'nul': chr(0)}
     >>> s = "ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d
     >>> s
     'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n'
     >>> res = _string_escape(s)
     >>> s == res.decode('string_escape')
     True
     """
     # subset of the string_escape codec
     text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r')
     return text.replace('\0', '\\0')
 
 def decodeextra(text):
     extra = {}
     for l in text.split('\0'):
         if l:
             k, v = l.decode('string_escape').split(':', 1)
             extra[k] = v
     return extra
 
 def encodeextra(d):
     # keys must be sorted to produce a deterministic changelog entry
     items = [_string_escape('%s:%s' % (k, d[k])) for k in sorted(d)]
     return "\0".join(items)
 
 class appender(object):
     '''the changelog index must be updated last on disk, so we use this class
     to delay writes to it'''
     def __init__(self, fp, buf):
         self.data = buf
         self.fp = fp
         self.offset = fp.tell()
         self.size = util.fstat(fp).st_size
 
     def end(self):
         return self.size + len("".join(self.data))
     def tell(self):
         return self.offset
     def flush(self):
         pass
     def close(self):
         self.fp.close()
 
     def seek(self, offset, whence=0):
         '''virtual file offset spans real file and data'''
         if whence == 0:
             self.offset = offset
         elif whence == 1:
             self.offset += offset
         elif whence == 2:
             self.offset = self.end() + offset
         if self.offset < self.size:
             self.fp.seek(self.offset)
 
     def read(self, count=-1):
         '''only trick here is reads that span real file and data'''
         ret = ""
         if self.offset < self.size:
             s = self.fp.read(count)
             ret = s
             self.offset += len(s)
             if count > 0:
                 count -= len(s)
         if count != 0:
             doff = self.offset - self.size
             self.data.insert(0, "".join(self.data))
             del self.data[1:]
             s = self.data[0][doff:doff+count]
             self.offset += len(s)
             ret += s
         return ret
 
     def write(self, s):
         self.data.append(str(s))
         self.offset += len(s)
 
 def delayopener(opener, target, divert, buf):
     def o(name, mode='r'):
         if name != target:
             return opener(name, mode)
         if divert:
             return opener(name + ".a", mode.replace('a', 'w'))
         # otherwise, divert to memory
         return appender(opener(name, mode), buf)
     return o
 
 class changelog(revlog.revlog):
     def __init__(self, opener):
         revlog.revlog.__init__(self, opener, "00changelog.i")
         self._realopener = opener
         self._delayed = False
         self._divert = False
 
     def delayupdate(self):
         "delay visibility of index updates to other readers"
         self._delayed = True
         self._divert = (len(self) == 0)
         self._delaybuf = []
         self.opener = delayopener(self._realopener, self.indexfile,
                                   self._divert, self._delaybuf)
 
     def finalize(self, tr):
         "finalize index updates"
         self._delayed = False
         self.opener = self._realopener
         # move redirected index data back into place
         if self._divert:
             n = self.opener(self.indexfile + ".a").name
             util.rename(n, n[:-2])
         elif self._delaybuf:
             fp = self.opener(self.indexfile, 'a')
             fp.write("".join(self._delaybuf))
             fp.close()
             self._delaybuf = []
         # split when we're done
         self.checkinlinesize(tr)
 
     def readpending(self, file):
         r = revlog.revlog(self.opener, file)
         self.index = r.index
         self.nodemap = r.nodemap
         self._chunkcache = r._chunkcache
 
     def writepending(self):
         "create a file containing the unfinalized state for pretxnchangegroup"
         if self._delaybuf:
             # make a temporary copy of the index
             fp1 = self._realopener(self.indexfile)
             fp2 = self._realopener(self.indexfile + ".a", "w")
             fp2.write(fp1.read())
             # add pending data
             fp2.write("".join(self._delaybuf))
             fp2.close()
             # switch modes so finalize can simply rename
             self._delaybuf = []
             self._divert = True
 
         if self._divert:
             return True
 
         return False
 
     def checkinlinesize(self, tr, fp=None):
         if not self._delayed:
             revlog.revlog.checkinlinesize(self, tr, fp)
 
     def read(self, node):
         """
         format used:
         nodeid\n        : manifest node in ascii
         user\n          : user, no \n or \r allowed
         time tz extra\n : date (time is int or float, timezone is int)
                         : extra is metadatas, encoded and separated by '\0'
                         : older versions ignore it
         files\n\n       : files modified by the cset, no \n or \r allowed
         (.*)            : comment (free text, ideally utf-8)
 
         changelog v0 doesn't use extra
         """
         text = self.revision(node)
         if not text:
             return (nullid, "", (0, 0), [], "", {'branch': 'default'})
         last = text.index("\n\n")
         desc = encoding.tolocal(text[last + 2:])
         l = text[:last].split('\n')
         manifest = bin(l[0])
         user = encoding.tolocal(l[1])
 
         extra_data = l[2].split(' ', 2)
         if len(extra_data) != 3:
             time = float(extra_data.pop(0))
             try:
                 # various tools did silly things with the time zone field.
                 timezone = int(extra_data[0])
             except:
                 timezone = 0
             extra = {}
         else:
             time, timezone, extra = extra_data
             time, timezone = float(time), int(timezone)
             extra = decodeextra(extra)
         if not extra.get('branch'):
             extra['branch'] = 'default'
         files = l[3:]
         return (manifest, user, (time, timezone), files, desc, extra)
 
     def add(self, manifest, files, desc, transaction, p1, p2,
                   user, date=None, extra=None):
         user = user.strip()
         # An empty username or a username with a "\n" will make the
         # revision text contain two "\n\n" sequences -> corrupt
         # repository since read cannot unpack the revision.
         if not user:
             raise error.RevlogError(_("empty username"))
         if "\n" in user:
             raise error.RevlogError(_("username %s contains a newline")
                                     % repr(user))
 
         # strip trailing whitespace and leading and trailing empty lines
         desc = '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n')
 
         user, desc = encoding.fromlocal(user), encoding.fromlocal(desc)
 
         if date:
             parseddate = "%d %d" % util.parsedate(date)
         else:
             parseddate = "%d %d" % util.makedate()
-        if extra and extra.get("branch") in ("default", ""):
+        if extra:
+            branch = extra.get("branch")
+            if branch in ("default", ""):
             del extra["branch"]
+            elif branch in (".", "null", "tip"):
+                raise error.RevlogError(_('the name \'%s\' is reserved')
+                                        % branch)
         if extra:
             extra = encodeextra(extra)
             parseddate = "%s %s" % (parseddate, extra)
         l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc]
         text = "\n".join(l)
         return self.addrevision(text, transaction, len(self), p1, p2)

mercurial/dirstate.py

@@ -1,641 +1,643 b''
 # dirstate.py - working directory tracking for mercurial
 #
 # Copyright 2005-2007 Matt Mackall <[e-mail]>
 #
 # 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 util, ignore, osutil, parsers
 import struct, os, stat, errno
 import cStringIO
 
 _unknown = ('?', 0, 0, 0)
 _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):
         '''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._root = root
         self._rootdir = os.path.join(root, '')
         self._dirty = False
         self._dirtypl = False
         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("branch").read().strip() or "default"
         except IOError:
             return "default"
 
     @propertycache
     def _pl(self):
         try:
             st = self._opener("dirstate").read(40)
             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.is_exec(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.is_exec(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._pl
 
     def branch(self):
         return 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 = branch
         self._opener("branch", "w").write(branch + '\n')
 
     def _read(self):
         self._map = {}
         self._copymap = {}
         try:
             st = self._opener("dirstate").read()
         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".split():
             if a in self.__dict__:
                 delattr(self, a)
         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":
             if '\r' in f or '\n' in f:
                 raise util.Abort(
                     _("'\\n' and '\\r' disallowed in filenames: %r") % 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))
         self._map[f] = ('n', s.st_mode, s.st_size, int(s.st_mtime))
         if f in self._copymap:
             del self._copymap[f]
 
     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' or dirty 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.normaldirty(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 normaldirty(self, f):
         'mark a file normal, but dirty'
         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:
             entry = self._map[f]
             if entry[0] == 'm':
                 size = -1
             elif entry[0] == 'n' and entry[2] == -2:
                 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 forget(self, f):
         'forget a file'
         self._dirty = True
         try:
             self._droppath(f)
             del self._map[f]
         except KeyError:
             self._ui.warn(_("not in dirstate: %s\n") % f)
 
     def _normalize(self, path, knownpath):
         norm_path = os.path.normcase(path)
         fold_path = self._foldmap.get(norm_path, None)
         if fold_path is None:
             if knownpath or not os.path.exists(os.path.join(self._root, path)):
                 fold_path = path
             else:
                 fold_path = self._foldmap.setdefault(norm_path,
                                 util.fspath(path, self._root))
         return fold_path
 
     def clear(self):
         self._map = {}
         if "_dirs" in self.__dict__:
             delattr(self, "_dirs");
         self._copymap = {}
         self._pl = [nullid, nullid]
         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 f in copymap:
                 f = "%s\0%s" % (f, copymap[f])
 
             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'
 
             e = pack(_format, e[0], e[1], e[2], e[3], len(f))
             write(e)
             write(f)
         st.write(cs.getvalue())
         st.rename()
         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, 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
 
         if self._checkcase:
             normalize = self._normalize
         else:
             normalize = lambda x, y: x
 
         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
 
         files = set(match.files())
         if not files or '.' in files:
             files = ['']
         results = {'.hg': None}
 
         # step 1: find all explicit files
         for ff in sorted(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
 
         del results['.hg']
         return results
 
     def status(self, match, 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
 
         for fn, st in self.walk(match, 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':
                 if (size >= 0 and
                     (size != st.st_size
                      or ((mode ^ st.st_mode) & 0100 and self._checkexec))
                     or size == -2
                     or fn in self._copymap):
                     madd(fn)
                 elif time != int(st.st_mtime):
                     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)

tests/test-branches

@@ -1,90 +1,94 b''
 #!/bin/sh
 
 hg init a
 cd a
 echo 'root' >root
 hg add root
 hg commit -d '0 0' -m "Adding root node"
 
 echo 'a' >a
 hg add a
 hg branch a
 hg commit -d '1 0' -m "Adding a branch"
 
 hg branch q
 echo 'aa' >a
 hg branch -C
 hg commit -d '2 0' -m "Adding to a branch"
 
 hg update -C 0
 echo 'b' >b
 hg add b
 hg branch b
 hg commit -d '2 0' -m "Adding b branch"
 
 echo 'bh1' >bh1
 hg add bh1
 hg commit -d '3 0' -m "Adding b branch head 1"
 
 hg update -C 2
 echo 'bh2' >bh2
 hg add bh2
 hg commit -d '4 0' -m "Adding b branch head 2"
 
 echo 'c' >c
 hg add c
 hg branch c
 hg commit -d '5 0' -m "Adding c branch"
 
+hg branch tip
+hg branch null
+hg branch .
+
 echo 'd' >d
 hg add d
 hg branch 'a branch name much longer than the default justification used by branches'
 hg commit -d '6 0' -m "Adding d branch"
 
 hg branches
 echo '-------'
 hg branches -a
 
 echo "--- Branch a"
 hg log -b a
 
 echo "---- Branch b"
 hg log -b b
 
 echo "---- going to test branch closing"
 hg branches
 hg up -C b
 echo 'xxx1' >> b
 hg commit -d '7 0' -m 'adding cset to branch b'
 hg up -C aee39cd168d0
 echo 'xxx2' >> b
 hg commit -d '8 0' -m 'adding head to branch b'
 echo 'xxx3' >> b
 hg commit -d '9 0' -m 'adding another cset to branch b'
 hg branches
 hg heads --closed
 hg heads
 hg commit -d '9 0' --close-branch -m 'prune bad branch'
 hg branches -a
 hg up -C b
 hg commit -d '9 0' --close-branch -m 'close this part branch too'
 echo '--- b branch should be inactive'
 hg branches
 hg branches -c
 hg branches -a
 hg heads b
 hg heads --closed b
 echo 'xxx4' >> b
 hg commit -d '9 0' -m 'reopen branch with a change'
 echo '--- branch b is back in action'
 hg branches -a
 echo '---- test heads listings'
 hg heads
 echo '% branch default'
 hg heads default
 echo '% branch a'
 hg heads a
 hg heads --active a
 echo '% branch b'
 hg heads b
 hg heads --closed b

tests/test-branches.out

@@ -1,173 +1,176 b''
 marked working directory as branch a
 marked working directory as branch q
 reset working directory to branch a
 0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 marked working directory as branch b
 created new head
 1 files updated, 0 files merged, 2 files removed, 0 files unresolved
 marked working directory as branch c
+abort: the name 'tip' is reserved
+abort: the name 'null' is reserved
+abort: the name '.' is reserved
 marked working directory as branch a branch name much longer than the default justification used by branches
 a branch name much longer than the default justification used by branches 7:10ff5895aa57
 b                              4:aee39cd168d0
 c                              6:589736a22561 (inactive)
 a                              5:d8cbc61dbaa6 (inactive)
 default                        0:19709c5a4e75 (inactive)
 -------
 a branch name much longer than the default justification used by branches 7:10ff5895aa57
 b                              4:aee39cd168d0
 --- Branch a
 changeset:   5:d8cbc61dbaa6
 branch:      a
 parent:      2:881fe2b92ad0
 user:        test
 date:        Thu Jan 01 00:00:04 1970 +0000
 summary:     Adding b branch head 2
 
 changeset:   2:881fe2b92ad0
 branch:      a
 user:        test
 date:        Thu Jan 01 00:00:02 1970 +0000
 summary:     Adding to a branch
 
 changeset:   1:dd6b440dd85a
 branch:      a
 user:        test
 date:        Thu Jan 01 00:00:01 1970 +0000
 summary:     Adding a branch
 
 ---- Branch b
 changeset:   4:aee39cd168d0
 branch:      b
 user:        test
 date:        Thu Jan 01 00:00:03 1970 +0000
 summary:     Adding b branch head 1
 
 changeset:   3:ac22033332d1
 branch:      b
 parent:      0:19709c5a4e75
 user:        test
 date:        Thu Jan 01 00:00:02 1970 +0000
 summary:     Adding b branch
 
 ---- going to test branch closing
 a branch name much longer than the default justification used by branches 7:10ff5895aa57
 b                              4:aee39cd168d0
 c                              6:589736a22561 (inactive)
 a                              5:d8cbc61dbaa6 (inactive)
 default                        0:19709c5a4e75 (inactive)
 2 files updated, 0 files merged, 4 files removed, 0 files unresolved
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 created new head
 b                             10:bfbe841b666e
 a branch name much longer than the default justification used by branches 7:10ff5895aa57
 c                              6:589736a22561 (inactive)
 a                              5:d8cbc61dbaa6 (inactive)
 default                        0:19709c5a4e75 (inactive)
 abort: you must specify a branch to use --closed
 changeset:   10:bfbe841b666e
 branch:      b
 tag:         tip
 user:        test
 date:        Thu Jan 01 00:00:09 1970 +0000
 summary:     adding another cset to branch b
 
 changeset:   8:eebb944467c9
 branch:      b
 parent:      4:aee39cd168d0
 user:        test
 date:        Thu Jan 01 00:00:07 1970 +0000
 summary:     adding cset to branch b
 
 changeset:   7:10ff5895aa57
 branch:      a branch name much longer than the default justification used by branches
 user:        test
 date:        Thu Jan 01 00:00:06 1970 +0000
 summary:     Adding d branch
 
 b                              8:eebb944467c9
 a branch name much longer than the default justification used by branches 7:10ff5895aa57
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 --- b branch should be inactive
 a branch name much longer than the default justification used by branches 7:10ff5895aa57
 c                              6:589736a22561 (inactive)
 a                              5:d8cbc61dbaa6 (inactive)
 default                        0:19709c5a4e75 (inactive)
 a branch name much longer than the default justification used by branches 7:10ff5895aa57
 b                             12:2da6583810df (closed)
 c                              6:589736a22561 (inactive)
 a                              5:d8cbc61dbaa6 (inactive)
 default                        0:19709c5a4e75 (inactive)
 a branch name much longer than the default justification used by branches 7:10ff5895aa57
 no open branch heads on branch b
 changeset:   12:2da6583810df
 branch:      b
 tag:         tip
 parent:      8:eebb944467c9
 user:        test
 date:        Thu Jan 01 00:00:09 1970 +0000
 summary:     close this part branch too
 
 changeset:   11:c84627f3c15d
 branch:      b
 user:        test
 date:        Thu Jan 01 00:00:09 1970 +0000
 summary:     prune bad branch
 
 --- branch b is back in action
 b                             13:6ac12926b8c3
 a branch name much longer than the default justification used by branches 7:10ff5895aa57
 ---- test heads listings
 changeset:   13:6ac12926b8c3
 branch:      b
 tag:         tip
 user:        test
 date:        Thu Jan 01 00:00:09 1970 +0000
 summary:     reopen branch with a change
 
 changeset:   11:c84627f3c15d
 branch:      b
 user:        test
 date:        Thu Jan 01 00:00:09 1970 +0000
 summary:     prune bad branch
 
 changeset:   7:10ff5895aa57
 branch:      a branch name much longer than the default justification used by branches
 user:        test
 date:        Thu Jan 01 00:00:06 1970 +0000
 summary:     Adding d branch
 
 % branch default
 changeset:   0:19709c5a4e75
 user:        test
 date:        Thu Jan 01 00:00:00 1970 +0000
 summary:     Adding root node
 
 % branch a
 changeset:   5:d8cbc61dbaa6
 branch:      a
 parent:      2:881fe2b92ad0
 user:        test
 date:        Thu Jan 01 00:00:04 1970 +0000
 summary:     Adding b branch head 2
 
 % branch b
 changeset:   13:6ac12926b8c3
 branch:      b
 tag:         tip
 user:        test
 date:        Thu Jan 01 00:00:09 1970 +0000
 summary:     reopen branch with a change
 
 changeset:   13:6ac12926b8c3
 branch:      b
 tag:         tip
 user:        test
 date:        Thu Jan 01 00:00:09 1970 +0000
 summary:     reopen branch with a change
 
 changeset:   11:c84627f3c15d
 branch:      b
 user:        test
 date:        Thu Jan 01 00:00:09 1970 +0000
 summary:     prune bad branch