Fix hg cat when the file cannot be found in the specified revision

mercurial/commands.py

@@ -1,2068 +1,2071 b''
 # commands.py - command processing for mercurial
 #
 # Copyright 2005 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 from demandload import demandload
 from node import *
 demandload(globals(), "os re sys signal shutil imp urllib pdb")
 demandload(globals(), "fancyopts ui hg util lock revlog")
 demandload(globals(), "fnmatch hgweb mdiff random signal time traceback")
 demandload(globals(), "errno socket version struct atexit sets bz2")
 
 class UnknownCommand(Exception):
     """Exception raised if command is not in the command table."""
 
 def filterfiles(filters, files):
     l = [x for x in files if x in filters]
 
     for t in filters:
         if t and t[-1] != "/":
             t += "/"
         l += [x for x in files if x.startswith(t)]
     return l
 
 def relpath(repo, args):
     cwd = repo.getcwd()
     if cwd:
         return [util.normpath(os.path.join(cwd, x)) for x in args]
     return args
 
 def matchpats(repo, cwd, pats=[], opts={}, head=''):
     return util.matcher(repo.root, cwd, pats or ['.'], opts.get('include'),
                         opts.get('exclude'), head)
 
 def makewalk(repo, pats, opts, head=''):
     cwd = repo.getcwd()
     files, matchfn, anypats = matchpats(repo, cwd, pats, opts, head)
     exact = dict(zip(files, files))
     def walk():
         for src, fn in repo.walk(files=files, match=matchfn):
             yield src, fn, util.pathto(cwd, fn), fn in exact
     return files, matchfn, walk()
 
 def walk(repo, pats, opts, head=''):
     files, matchfn, results = makewalk(repo, pats, opts, head)
     for r in results:
         yield r
 
 def walkchangerevs(ui, repo, cwd, pats, opts):
     '''Iterate over files and the revs they changed in.
 
     Callers most commonly need to iterate backwards over the history
     it is interested in.  Doing so has awful (quadratic-looking)
     performance, so we use iterators in a "windowed" way.
 
     We walk a window of revisions in the desired order.  Within the
     window, we first walk forwards to gather data, then in the desired
     order (usually backwards) to display it.
 
     This function returns an (iterator, getchange) pair.  The
     getchange function returns the changelog entry for a numeric
     revision.  The iterator yields 3-tuples.  They will be of one of
     the following forms:
 
     "window", incrementing, lastrev: stepping through a window,
     positive if walking forwards through revs, last rev in the
     sequence iterated over - use to reset state for the current window
 
     "add", rev, fns: out-of-order traversal of the given file names
     fns, which changed during revision rev - use to gather data for
     possible display
 
     "iter", rev, None: in-order traversal of the revs earlier iterated
     over with "add" - use to display data'''
     cwd = repo.getcwd()
     if not pats and cwd:
         opts['include'] = [os.path.join(cwd, i) for i in opts['include']]
         opts['exclude'] = [os.path.join(cwd, x) for x in opts['exclude']]
     files, matchfn, anypats = matchpats(repo, (pats and cwd) or '',
                                         pats, opts)
     revs = map(int, revrange(ui, repo, opts['rev'] or ['tip:0']))
     wanted = {}
     slowpath = anypats
     window = 300
     fncache = {}
 
     chcache = {}
     def getchange(rev):
         ch = chcache.get(rev)
         if ch is None:
             chcache[rev] = ch = repo.changelog.read(repo.lookup(str(rev)))
         return ch
 
     if not slowpath and not files:
         # No files, no patterns.  Display all revs.
         wanted = dict(zip(revs, revs))
     if not slowpath:
         # Only files, no patterns.  Check the history of each file.
         def filerevgen(filelog):
             for i in xrange(filelog.count() - 1, -1, -window):
                 revs = []
                 for j in xrange(max(0, i - window), i + 1):
                     revs.append(filelog.linkrev(filelog.node(j)))
                 revs.reverse()
                 for rev in revs:
                     yield rev
 
         minrev, maxrev = min(revs), max(revs)
         for file in files:
             filelog = repo.file(file)
             # A zero count may be a directory or deleted file, so
             # try to find matching entries on the slow path.
             if filelog.count() == 0:
                 slowpath = True
                 break
             for rev in filerevgen(filelog):
                 if rev <= maxrev:
                     if rev < minrev:
                         break
                     fncache.setdefault(rev, [])
                     fncache[rev].append(file)
                     wanted[rev] = 1
     if slowpath:
         # The slow path checks files modified in every changeset.
         def changerevgen():
             for i in xrange(repo.changelog.count() - 1, -1, -window):
                 for j in xrange(max(0, i - window), i + 1):
                     yield j, getchange(j)[3]
 
         for rev, changefiles in changerevgen():
             matches = filter(matchfn, changefiles)
             if matches:
                 fncache[rev] = matches
                 wanted[rev] = 1
 
     def iterate():
         for i in xrange(0, len(revs), window):
             yield 'window', revs[0] < revs[-1], revs[-1]
             nrevs = [rev for rev in revs[i:min(i+window, len(revs))]
                      if rev in wanted]
             srevs = list(nrevs)
             srevs.sort()
             for rev in srevs:
                 fns = fncache.get(rev) or filter(matchfn, getchange(rev)[3])
                 yield 'add', rev, fns
             for rev in nrevs:
                 yield 'iter', rev, None
     return iterate(), getchange
 
 revrangesep = ':'
 
 def revrange(ui, repo, revs, revlog=None):
     """Yield revision as strings from a list of revision specifications."""
     if revlog is None:
         revlog = repo.changelog
     revcount = revlog.count()
     def fix(val, defval):
         if not val:
             return defval
         try:
             num = int(val)
             if str(num) != val:
                 raise ValueError
             if num < 0:
                 num += revcount
             if not (0 <= num < revcount):
                 raise ValueError
         except ValueError:
             try:
                 num = repo.changelog.rev(repo.lookup(val))
             except KeyError:
                 try:
                     num = revlog.rev(revlog.lookup(val))
                 except KeyError:
                     raise util.Abort('invalid revision identifier %s', val)
         return num
     seen = {}
     for spec in revs:
         if spec.find(revrangesep) >= 0:
             start, end = spec.split(revrangesep, 1)
             start = fix(start, 0)
             end = fix(end, revcount - 1)
             step = start > end and -1 or 1
             for rev in xrange(start, end+step, step):
                 if rev in seen: continue
                 seen[rev] = 1
                 yield str(rev)
         else:
             rev = fix(spec, None)
             if rev in seen: continue
             seen[rev] = 1
             yield str(rev)
 
 def make_filename(repo, r, pat, node=None,
                   total=None, seqno=None, revwidth=None):
     node_expander = {
         'H': lambda: hex(node),
         'R': lambda: str(r.rev(node)),
         'h': lambda: short(node),
         }
     expander = {
         '%': lambda: '%',
         'b': lambda: os.path.basename(repo.root),
         }
 
     try:
         if node:
             expander.update(node_expander)
         if node and revwidth is not None:
             expander['r'] = lambda: str(r.rev(node)).zfill(revwidth)
         if total is not None:
             expander['N'] = lambda: str(total)
         if seqno is not None:
             expander['n'] = lambda: str(seqno)
         if total is not None and seqno is not None:
             expander['n'] = lambda:str(seqno).zfill(len(str(total)))
 
         newname = []
         patlen = len(pat)
         i = 0
         while i < patlen:
             c = pat[i]
             if c == '%':
                 i += 1
                 c = pat[i]
                 c = expander[c]()
             newname.append(c)
             i += 1
         return ''.join(newname)
     except KeyError, inst:
         raise util.Abort("invalid format spec '%%%s' in output file name",
                     inst.args[0])
 
 def make_file(repo, r, pat, node=None,
               total=None, seqno=None, revwidth=None, mode='wb'):
     if not pat or pat == '-':
         return 'w' in mode and sys.stdout or sys.stdin
     if hasattr(pat, 'write') and 'w' in mode:
         return pat
     if hasattr(pat, 'read') and 'r' in mode:
         return pat
     return open(make_filename(repo, r, pat, node, total, seqno, revwidth),
                 mode)
 
 def dodiff(fp, ui, repo, node1, node2, files=None, match=util.always,
            changes=None, text=False):
     def date(c):
         return time.asctime(time.gmtime(float(c[2].split(' ')[0])))
 
     if not changes:
         (c, a, d, u) = repo.changes(node1, node2, files, match=match)
     else:
         (c, a, d, u) = changes
     if files:
         c, a, d = map(lambda x: filterfiles(files, x), (c, a, d))
 
     if not c and not a and not d:
         return
 
     if node2:
         change = repo.changelog.read(node2)
         mmap2 = repo.manifest.read(change[0])
         date2 = date(change)
         def read(f):
             return repo.file(f).read(mmap2[f])
     else:
         date2 = time.asctime()
         if not node1:
             node1 = repo.dirstate.parents()[0]
         def read(f):
             return repo.wfile(f).read()
 
     if ui.quiet:
         r = None
     else:
         hexfunc = ui.verbose and hex or short
         r = [hexfunc(node) for node in [node1, node2] if node]
 
     change = repo.changelog.read(node1)
     mmap = repo.manifest.read(change[0])
     date1 = date(change)
 
     for f in c:
         to = None
         if f in mmap:
             to = repo.file(f).read(mmap[f])
         tn = read(f)
         fp.write(mdiff.unidiff(to, date1, tn, date2, f, r, text=text))
     for f in a:
         to = None
         tn = read(f)
         fp.write(mdiff.unidiff(to, date1, tn, date2, f, r, text=text))
     for f in d:
         to = repo.file(f).read(mmap[f])
         tn = None
         fp.write(mdiff.unidiff(to, date1, tn, date2, f, r, text=text))
 
 def trimuser(ui, name, rev, revcache):
     """trim the name of the user who committed a change"""
     user = revcache.get(rev)
     if user is None:
         user = revcache[rev] = ui.shortuser(name)
     return user
 
 def show_changeset(ui, repo, rev=0, changenode=None, brinfo=None):
     """show a single changeset or file revision"""
     log = repo.changelog
     if changenode is None:
         changenode = log.node(rev)
     elif not rev:
         rev = log.rev(changenode)
 
     if ui.quiet:
         ui.write("%d:%s\n" % (rev, short(changenode)))
         return
 
     changes = log.read(changenode)
 
     t, tz = changes[2].split(' ')
     # a conversion tool was sticking non-integer offsets into repos
     try:
         tz = int(tz)
     except ValueError:
         tz = 0
     date = time.asctime(time.localtime(float(t))) + " %+05d" % (int(tz)/-36)
 
     parents = [(log.rev(p), ui.verbose and hex(p) or short(p))
                for p in log.parents(changenode)
                if ui.debugflag or p != nullid]
     if not ui.debugflag and len(parents) == 1 and parents[0][0] == rev-1:
         parents = []
 
     if ui.verbose:
         ui.write("changeset:   %d:%s\n" % (rev, hex(changenode)))
     else:
         ui.write("changeset:   %d:%s\n" % (rev, short(changenode)))
 
     for tag in repo.nodetags(changenode):
         ui.status("tag:         %s\n" % tag)
     for parent in parents:
         ui.write("parent:      %d:%s\n" % parent)
 
     if brinfo and changenode in brinfo:
         br = brinfo[changenode]
         ui.write("branch:      %s\n" % " ".join(br))
 
     ui.debug("manifest:    %d:%s\n" % (repo.manifest.rev(changes[0]),
                                       hex(changes[0])))
     ui.status("user:        %s\n" % changes[1])
     ui.status("date:        %s\n" % date)
 
     if ui.debugflag:
         files = repo.changes(log.parents(changenode)[0], changenode)
         for key, value in zip(["files:", "files+:", "files-:"], files):
             if value:
                 ui.note("%-12s %s\n" % (key, " ".join(value)))
     else:
         ui.note("files:       %s\n" % " ".join(changes[3]))
 
     description = changes[4].strip()
     if description:
         if ui.verbose:
             ui.status("description:\n")
             ui.status(description)
             ui.status("\n\n")
         else:
             ui.status("summary:     %s\n" % description.splitlines()[0])
     ui.status("\n")
 
 def show_version(ui):
     """output version and copyright information"""
     ui.write("Mercurial Distributed SCM (version %s)\n"
              % version.get_version())
     ui.status(
         "\nCopyright (C) 2005 Matt Mackall <[e-mail]>\n"
         "This is free software; see the source for copying conditions. "
         "There is NO\nwarranty; "
         "not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
     )
 
 def help_(ui, cmd=None, with_version=False):
     """show help for a given command or all commands"""
     option_lists = []
     if cmd and cmd != 'shortlist':
         if with_version:
             show_version(ui)
             ui.write('\n')
         key, i = find(cmd)
         # synopsis
         ui.write("%s\n\n" % i[2])
 
         # description
         doc = i[0].__doc__
         if ui.quiet:
             doc = doc.splitlines(0)[0]
         ui.write("%s\n" % doc.rstrip())
 
         if not ui.quiet:
             # aliases
             aliases = ', '.join(key.split('|')[1:])
             if aliases:
                 ui.write("\naliases: %s\n" % aliases)
 
             # options
             if i[1]:
                 option_lists.append(("options", i[1]))
 
     else:
         # program name
         if ui.verbose or with_version:
             show_version(ui)
         else:
             ui.status("Mercurial Distributed SCM\n")
         ui.status('\n')
 
         # list of commands
         if cmd == "shortlist":
             ui.status('basic commands (use "hg help" '
                       'for the full list or option "-v" for details):\n\n')
         elif ui.verbose:
             ui.status('list of commands:\n\n')
         else:
             ui.status('list of commands (use "hg help -v" '
                       'to show aliases and global options):\n\n')
 
         h = {}
         cmds = {}
         for c, e in table.items():
             f = c.split("|")[0]
             if cmd == "shortlist" and not f.startswith("^"):
                 continue
             f = f.lstrip("^")
             if not ui.debugflag and f.startswith("debug"):
                 continue
             d = ""
             if e[0].__doc__:
                 d = e[0].__doc__.splitlines(0)[0].rstrip()
             h[f] = d
             cmds[f]=c.lstrip("^")
 
         fns = h.keys()
         fns.sort()
         m = max(map(len, fns))
         for f in fns:
             if ui.verbose:
                 commands = cmds[f].replace("|",", ")
                 ui.write(" %s:\n      %s\n"%(commands,h[f]))
             else:
                 ui.write(' %-*s   %s\n' % (m, f, h[f]))
 
     # global options
     if ui.verbose:
         option_lists.append(("global options", globalopts))
 
     # list all option lists
     opt_output = []
     for title, options in option_lists:
         opt_output.append(("\n%s:\n" % title, None))
         for shortopt, longopt, default, desc in options:
             opt_output.append(("%2s%s" % (shortopt and "-%s" % shortopt,
                                           longopt and " --%s" % longopt),
                                "%s%s" % (desc,
                                          default and " (default: %s)" % default
                                          or "")))
 
     if opt_output:
         opts_len = max([len(line[0]) for line in opt_output if line[1]])
         for first, second in opt_output:
             if second:
                 ui.write(" %-*s  %s\n" % (opts_len, first, second))
             else:
                 ui.write("%s\n" % first)
 
 # Commands start here, listed alphabetically
 
 def add(ui, repo, *pats, **opts):
     '''add the specified files on the next commit'''
     names = []
     for src, abs, rel, exact in walk(repo, pats, opts):
         if exact:
             names.append(abs)
         elif repo.dirstate.state(abs) == '?':
             ui.status('adding %s\n' % rel)
             names.append(abs)
     repo.add(names)
 
 def addremove(ui, repo, *pats, **opts):
     """add all new files, delete all missing files"""
     add, remove = [], []
     for src, abs, rel, exact in walk(repo, pats, opts):
         if src == 'f' and repo.dirstate.state(abs) == '?':
             add.append(abs)
             if not exact:
                 ui.status('adding ', rel, '\n')
         if repo.dirstate.state(abs) != 'r' and not os.path.exists(rel):
             remove.append(abs)
             if not exact:
                 ui.status('removing ', rel, '\n')
     repo.add(add)
     repo.remove(remove)
 
 def annotate(ui, repo, *pats, **opts):
     """show changeset information per file line"""
     def getnode(rev):
         return short(repo.changelog.node(rev))
 
     ucache = {}
     def getname(rev):
         cl = repo.changelog.read(repo.changelog.node(rev))
         return trimuser(ui, cl[1], rev, ucache)
 
     if not pats:
         raise util.Abort('at least one file name or pattern required')
 
     opmap = [['user', getname], ['number', str], ['changeset', getnode]]
     if not opts['user'] and not opts['changeset']:
         opts['number'] = 1
 
     if opts['rev']:
         node = repo.changelog.lookup(opts['rev'])
     else:
         node = repo.dirstate.parents()[0]
     change = repo.changelog.read(node)
     mmap = repo.manifest.read(change[0])
 
     for src, abs, rel, exact in walk(repo, pats, opts):
         if abs not in mmap:
             ui.warn("warning: %s is not in the repository!\n" % rel)
             continue
 
         f = repo.file(abs)
         if not opts['text'] and util.binary(f.read(mmap[abs])):
             ui.write("%s: binary file\n" % rel)
             continue
 
         lines = f.annotate(mmap[abs])
         pieces = []
 
         for o, f in opmap:
             if opts[o]:
                 l = [f(n) for n, dummy in lines]
                 if l:
                     m = max(map(len, l))
                     pieces.append(["%*s" % (m, x) for x in l])
 
         if pieces:
             for p, l in zip(zip(*pieces), lines):
                 ui.write("%s: %s" % (" ".join(p), l[1]))
 
 def bundle(ui, repo, fname, dest="default-push", **opts):
     """create a changegroup file"""
     f = open(fname, "wb")
     dest = ui.expandpath(dest)
     other = hg.repository(ui, dest)
     o = repo.findoutgoing(other)
     cg = repo.changegroup(o)
 
     try:
         f.write("HG10")
         z = bz2.BZ2Compressor(9)
         while 1:
             chunk = cg.read(4096)
             if not chunk:
                 break
             f.write(z.compress(chunk))
         f.write(z.flush())
     except:
         os.unlink(fname)
 
 def cat(ui, repo, file1, rev=None, **opts):
     """output the latest or given revision of a file"""
     r = repo.file(relpath(repo, [file1])[0])
     if rev:
         try:
             # assume all revision numbers are for changesets
             n = repo.lookup(rev)
             change = repo.changelog.read(n)
             m = repo.manifest.read(change[0])
             n = m[relpath(repo, [file1])[0]]
-        except hg.RepoError, KeyError:
-            n = r.lookup(rev)
+        except (hg.RepoError, KeyError):
+            try:
+                n = r.lookup(rev)
+            except KeyError, inst:
+                raise util.Abort('cannot find file %s in rev %s', file1, rev)
     else:
         n = r.tip()
     fp = make_file(repo, r, opts['output'], node=n)
     fp.write(r.read(n))
 
 def clone(ui, source, dest=None, **opts):
     """make a copy of an existing repository"""
     if dest is None:
         dest = os.path.basename(os.path.normpath(source))
 
     if os.path.exists(dest):
         raise util.Abort("destination '%s' already exists", dest)
 
     dest = os.path.realpath(dest)
 
     class Dircleanup:
         def __init__(self, dir_):
             self.rmtree = shutil.rmtree
             self.dir_ = dir_
             os.mkdir(dir_)
         def close(self):
             self.dir_ = None
         def __del__(self):
             if self.dir_:
                 self.rmtree(self.dir_, True)
 
     if opts['ssh']:
         ui.setconfig("ui", "ssh", opts['ssh'])
     if opts['remotecmd']:
         ui.setconfig("ui", "remotecmd", opts['remotecmd'])
 
     d = Dircleanup(dest)
     if not os.path.exists(source):
         source = ui.expandpath(source)
     abspath = source
     other = hg.repository(ui, source)
 
     if other.dev() != -1:
         abspath = os.path.abspath(source)
 
         # we use a lock here because if we race with commit, we can
         # end up with extra data in the cloned revlogs that's not
         # pointed to by changesets, thus causing verify to fail
         l1 = lock.lock(os.path.join(source, ".hg", "lock"))
 
         # and here to avoid premature writing to the target
         os.mkdir(os.path.join(dest, ".hg"))
         l2 = lock.lock(os.path.join(dest, ".hg", "lock"))
 
         files = "data 00manifest.d 00manifest.i 00changelog.d 00changelog.i"
         for f in files.split():
             src = os.path.join(source, ".hg", f)
             dst = os.path.join(dest, ".hg", f)
             util.copyfiles(src, dst)
 
         repo = hg.repository(ui, dest)
 
     else:
         repo = hg.repository(ui, dest, create=1)
         repo.pull(other)
 
     f = repo.opener("hgrc", "w")
     f.write("[paths]\n")
     f.write("default = %s\n" % abspath)
 
     if not opts['noupdate']:
         update(ui, repo)
 
     d.close()
 
 def commit(ui, repo, *pats, **opts):
     """commit the specified files or all outstanding changes"""
     if opts['text']:
         ui.warn("Warning: -t and --text is deprecated,"
                 " please use -m or --message instead.\n")
     message = opts['message'] or opts['text']
     logfile = opts['logfile']
     if not message and logfile:
         try:
             if logfile == '-':
                 message = sys.stdin.read()
             else:
                 message = open(logfile).read()
         except IOError, why:
             ui.warn("Can't read commit message %s: %s\n" % (logfile, why))
 
     if opts['addremove']:
         addremove(ui, repo, *pats, **opts)
     cwd = repo.getcwd()
     if not pats and cwd:
         opts['include'] = [os.path.join(cwd, i) for i in opts['include']]
         opts['exclude'] = [os.path.join(cwd, x) for x in opts['exclude']]
     fns, match, anypats = matchpats(repo, (pats and repo.getcwd()) or '',
                                     pats, opts)
     if pats:
         c, a, d, u = repo.changes(files=fns, match=match)
         files = c + a + [fn for fn in d if repo.dirstate.state(fn) == 'r']
     else:
         files = []
     try:
         repo.commit(files, message, opts['user'], opts['date'], match)
     except ValueError, inst:
         raise util.Abort(str(inst))
 
 def copy(ui, repo, source, dest):
     """mark a file as copied or renamed for the next commit"""
     return repo.copy(*relpath(repo, (source, dest)))
 
 def debugcheckstate(ui, repo):
     """validate the correctness of the current dirstate"""
     parent1, parent2 = repo.dirstate.parents()
     repo.dirstate.read()
     dc = repo.dirstate.map
     keys = dc.keys()
     keys.sort()
     m1n = repo.changelog.read(parent1)[0]
     m2n = repo.changelog.read(parent2)[0]
     m1 = repo.manifest.read(m1n)
     m2 = repo.manifest.read(m2n)
     errors = 0
     for f in dc:
         state = repo.dirstate.state(f)
         if state in "nr" and f not in m1:
             ui.warn("%s in state %s, but not in manifest1\n" % (f, state))
             errors += 1
         if state in "a" and f in m1:
             ui.warn("%s in state %s, but also in manifest1\n" % (f, state))
             errors += 1
         if state in "m" and f not in m1 and f not in m2:
             ui.warn("%s in state %s, but not in either manifest\n" %
                     (f, state))
             errors += 1
     for f in m1:
         state = repo.dirstate.state(f)
         if state not in "nrm":
             ui.warn("%s in manifest1, but listed as state %s" % (f, state))
             errors += 1
     if errors:
         raise util.Abort(".hg/dirstate inconsistent with current parent's manifest")
 
 def debugconfig(ui):
     """show combined config settings from all hgrc files"""
     try:
         repo = hg.repository(ui)
     except hg.RepoError:
         pass
     for section, name, value in ui.walkconfig():
         ui.write('%s.%s=%s\n' % (section, name, value))
 
 def debugstate(ui, repo):
     """show the contents of the current dirstate"""
     repo.dirstate.read()
     dc = repo.dirstate.map
     keys = dc.keys()
     keys.sort()
     for file_ in keys:
         ui.write("%c %3o %10d %s %s\n"
                  % (dc[file_][0], dc[file_][1] & 0777, dc[file_][2],
                     time.strftime("%x %X",
                                   time.localtime(dc[file_][3])), file_))
     for f in repo.dirstate.copies:
         ui.write("copy: %s -> %s\n" % (repo.dirstate.copies[f], f))
 
 def debugdata(ui, file_, rev):
     """dump the contents of an data file revision"""
     r = revlog.revlog(file, file_[:-2] + ".i", file_)
     ui.write(r.revision(r.lookup(rev)))
 
 def debugindex(ui, file_):
     """dump the contents of an index file"""
     r = revlog.revlog(file, file_, "")
     ui.write("   rev    offset  length   base linkrev" +
              " nodeid       p1           p2\n")
     for i in range(r.count()):
         e = r.index[i]
         ui.write("% 6d % 9d % 7d % 6d % 7d %s %s %s\n" % (
                 i, e[0], e[1], e[2], e[3],
             short(e[6]), short(e[4]), short(e[5])))
 
 def debugindexdot(ui, file_):
     """dump an index DAG as a .dot file"""
     r = revlog.revlog(file, file_, "")
     ui.write("digraph G {\n")
     for i in range(r.count()):
         e = r.index[i]
         ui.write("\t%d -> %d\n" % (r.rev(e[4]), i))
         if e[5] != nullid:
             ui.write("\t%d -> %d\n" % (r.rev(e[5]), i))
     ui.write("}\n")
 
 def debugrename(ui, repo, file, rev=None):
     """dump rename information"""
     r = repo.file(relpath(repo, [file])[0])
     if rev:
         try:
             # assume all revision numbers are for changesets
             n = repo.lookup(rev)
             change = repo.changelog.read(n)
             m = repo.manifest.read(change[0])
             n = m[relpath(repo, [file])[0]]
         except hg.RepoError, KeyError:
             n = r.lookup(rev)
     else:
         n = r.tip()
     m = r.renamed(n)
     if m:
         ui.write("renamed from %s:%s\n" % (m[0], hex(m[1])))
     else:
         ui.write("not renamed\n")
 
 def debugwalk(ui, repo, *pats, **opts):
     """show how files match on given patterns"""
     items = list(walk(repo, pats, opts))
     if not items:
         return
     fmt = '%%s  %%-%ds  %%-%ds  %%s\n' % (
         max([len(abs) for (src, abs, rel, exact) in items]),
         max([len(rel) for (src, abs, rel, exact) in items]))
     for src, abs, rel, exact in items:
         ui.write(fmt % (src, abs, rel, exact and 'exact' or ''))
 
 def diff(ui, repo, *pats, **opts):
     """diff working directory (or selected files)"""
     node1, node2 = None, None
     revs = [repo.lookup(x) for x in opts['rev']]
 
     if len(revs) > 0:
         node1 = revs[0]
     if len(revs) > 1:
         node2 = revs[1]
     if len(revs) > 2:
         raise util.Abort("too many revisions to diff")
 
     files = []
     match = util.always
     if pats:
         roots, match, results = makewalk(repo, pats, opts)
         for src, abs, rel, exact in results:
             files.append(abs)
 
     dodiff(sys.stdout, ui, repo, node1, node2, files, match=match,
            text=opts['text'])
 
 def doexport(ui, repo, changeset, seqno, total, revwidth, opts):
     node = repo.lookup(changeset)
     prev, other = repo.changelog.parents(node)
     change = repo.changelog.read(node)
 
     fp = make_file(repo, repo.changelog, opts['output'],
                    node=node, total=total, seqno=seqno,
                    revwidth=revwidth)
     if fp != sys.stdout:
         ui.note("%s\n" % fp.name)
 
     fp.write("# HG changeset patch\n")
     fp.write("# User %s\n" % change[1])
     fp.write("# Node ID %s\n" % hex(node))
     fp.write("# Parent  %s\n" % hex(prev))
     if other != nullid:
         fp.write("# Parent  %s\n" % hex(other))
     fp.write(change[4].rstrip())
     fp.write("\n\n")
 
     dodiff(fp, ui, repo, prev, node, text=opts['text'])
     if fp != sys.stdout:
         fp.close()
 
 def export(ui, repo, *changesets, **opts):
     """dump the header and diffs for one or more changesets"""
     if not changesets:
         raise util.Abort("export requires at least one changeset")
     seqno = 0
     revs = list(revrange(ui, repo, changesets))
     total = len(revs)
     revwidth = max(map(len, revs))
     ui.note(len(revs) > 1 and "Exporting patches:\n" or "Exporting patch:\n")
     for cset in revs:
         seqno += 1
         doexport(ui, repo, cset, seqno, total, revwidth, opts)
 
 def forget(ui, repo, *pats, **opts):
     """don't add the specified files on the next commit"""
     forget = []
     for src, abs, rel, exact in walk(repo, pats, opts):
         if repo.dirstate.state(abs) == 'a':
             forget.append(abs)
             if not exact:
                 ui.status('forgetting ', rel, '\n')
     repo.forget(forget)
 
 def grep(ui, repo, pattern, *pats, **opts):
     """search for a pattern in specified files and revisions"""
     reflags = 0
     if opts['ignore_case']:
         reflags |= re.I
     regexp = re.compile(pattern, reflags)
     sep, eol = ':', '\n'
     if opts['print0']:
         sep = eol = '\0'
 
     fcache = {}
     def getfile(fn):
         if fn not in fcache:
             fcache[fn] = repo.file(fn)
         return fcache[fn]
 
     def matchlines(body):
         begin = 0
         linenum = 0
         while True:
             match = regexp.search(body, begin)
             if not match:
                 break
             mstart, mend = match.span()
             linenum += body.count('\n', begin, mstart) + 1
             lstart = body.rfind('\n', begin, mstart) + 1 or begin
             lend = body.find('\n', mend)
             yield linenum, mstart - lstart, mend - lstart, body[lstart:lend]
             begin = lend + 1
 
     class linestate:
         def __init__(self, line, linenum, colstart, colend):
             self.line = line
             self.linenum = linenum
             self.colstart = colstart
             self.colend = colend
         def __eq__(self, other):
             return self.line == other.line
         def __hash__(self):
             return hash(self.line)
 
     matches = {}
     def grepbody(fn, rev, body):
         matches[rev].setdefault(fn, {})
         m = matches[rev][fn]
         for lnum, cstart, cend, line in matchlines(body):
             s = linestate(line, lnum, cstart, cend)
             m[s] = s
 
     prev = {}
     ucache = {}
     def display(fn, rev, states, prevstates):
         diff = list(sets.Set(states).symmetric_difference(sets.Set(prevstates)))
         diff.sort(lambda x, y: cmp(x.linenum, y.linenum))
         counts = {'-': 0, '+': 0}
         filerevmatches = {}
         for l in diff:
             if incrementing or not opts['all']:
                 change = ((l in prevstates) and '-') or '+'
                 r = rev
             else:
                 change = ((l in states) and '-') or '+'
                 r = prev[fn]
             cols = [fn, str(rev)]
             if opts['line_number']: cols.append(str(l.linenum))
             if opts['all']: cols.append(change)
             if opts['user']: cols.append(trimuser(ui, getchange(rev)[1], rev,
                                                   ucache))
             if opts['files_with_matches']:
                 c = (fn, rev)
                 if c in filerevmatches: continue
                 filerevmatches[c] = 1
             else:
                 cols.append(l.line)
             ui.write(sep.join(cols), eol)
             counts[change] += 1
         return counts['+'], counts['-']
 
     fstate = {}
     skip = {}
     changeiter, getchange = walkchangerevs(ui, repo, repo.getcwd(), pats, opts)
     count = 0
     for st, rev, fns in changeiter:
         if st == 'window':
             incrementing = rev
             matches.clear()
         elif st == 'add':
             change = repo.changelog.read(repo.lookup(str(rev)))
             mf = repo.manifest.read(change[0])
             matches[rev] = {}
             for fn in fns:
                 if fn in skip: continue
                 fstate.setdefault(fn, {})
                 try:
                     grepbody(fn, rev, getfile(fn).read(mf[fn]))
                 except KeyError:
                     pass
         elif st == 'iter':
             states = matches[rev].items()
             states.sort()
             for fn, m in states:
                 if fn in skip: continue
                 if incrementing or not opts['all'] or fstate[fn]:
                     pos, neg = display(fn, rev, m, fstate[fn])
                     count += pos + neg
                     if pos and not opts['all']:
                         skip[fn] = True
                 fstate[fn] = m
                 prev[fn] = rev
 
     if not incrementing:
         fstate = fstate.items()
         fstate.sort()
         for fn, state in fstate:
             if fn in skip: continue
             display(fn, rev, {}, state)
     return (count == 0 and 1) or 0
 
 def heads(ui, repo, **opts):
     """show current repository heads"""
     heads = repo.changelog.heads()
     br = None
     if opts['branches']:
         br = repo.branchlookup(heads)
     for n in repo.changelog.heads():
         show_changeset(ui, repo, changenode=n, brinfo=br)
 
 def identify(ui, repo):
     """print information about the working copy"""
     parents = [p for p in repo.dirstate.parents() if p != nullid]
     if not parents:
         ui.write("unknown\n")
         return
 
     hexfunc = ui.verbose and hex or short
     (c, a, d, u) = repo.changes()
     output = ["%s%s" % ('+'.join([hexfunc(parent) for parent in parents]),
                         (c or a or d) and "+" or "")]
 
     if not ui.quiet:
         # multiple tags for a single parent separated by '/'
         parenttags = ['/'.join(tags)
                       for tags in map(repo.nodetags, parents) if tags]
         # tags for multiple parents separated by ' + '
         if parenttags:
             output.append(' + '.join(parenttags))
 
     ui.write("%s\n" % ' '.join(output))
 
 def import_(ui, repo, patch1, *patches, **opts):
     """import an ordered set of patches"""
     patches = (patch1,) + patches
 
     if not opts['force']:
         (c, a, d, u) = repo.changes()
         if c or a or d:
             raise util.Abort("outstanding uncommitted changes")
 
     d = opts["base"]
     strip = opts["strip"]
 
     mailre = re.compile(r'(?:From |[\w-]+:)')
     diffre = re.compile(r'(?:diff -|--- .*\s+\w+ \w+ +\d+ \d+:\d+:\d+ \d+)')
 
     for patch in patches:
         ui.status("applying %s\n" % patch)
         pf = os.path.join(d, patch)
 
         message = []
         user = None
         hgpatch = False
         for line in file(pf):
             line = line.rstrip()
             if (not message and not hgpatch and
                    mailre.match(line) and not opts['force']):
                 if len(line) > 35: line = line[:32] + '...'
                 raise util.Abort('first line looks like a '
                                  'mail header: ' + line)
             if diffre.match(line):
                 break
             elif hgpatch:
                 # parse values when importing the result of an hg export
                 if line.startswith("# User "):
                     user = line[7:]
                     ui.debug('User: %s\n' % user)
                 elif not line.startswith("# ") and line:
                     message.append(line)
                     hgpatch = False
             elif line == '# HG changeset patch':
                 hgpatch = True
                 message = []       # We may have collected garbage
             else:
                 message.append(line)
 
         # make sure message isn't empty
         if not message:
             message = "imported patch %s\n" % patch
         else:
             message = "%s\n" % '\n'.join(message)
         ui.debug('message:\n%s\n' % message)
 
         f = os.popen("patch -p%d < '%s'" % (strip, pf))
         files = []
         for l in f.read().splitlines():
             l.rstrip('\r\n');
             ui.status("%s\n" % l)
             if l.startswith('patching file '):
                 pf = l[14:]
                 if pf not in files:
                     files.append(pf)
         patcherr = f.close()
         if patcherr:
             raise util.Abort("patch failed")
 
         if len(files) > 0:
             addremove(ui, repo, *files)
         repo.commit(files, message, user)
 
 def incoming(ui, repo, source="default", **opts):
     """show new changesets found in source"""
     source = ui.expandpath(source)
     other = hg.repository(ui, source)
     if not other.local():
         raise util.Abort("incoming doesn't work for remote repositories yet")
     o = repo.findincoming(other)
     if not o:
         return
     o = other.newer(o)
     o.reverse()
     for n in o:
         show_changeset(ui, other, changenode=n)
         if opts['patch']:
             prev = other.changelog.parents(n)[0]
             dodiff(ui, ui, other, prev, n)
             ui.write("\n")
 
 def init(ui, dest="."):
     """create a new repository in the given directory"""
     if not os.path.exists(dest):
         os.mkdir(dest)
     hg.repository(ui, dest, create=1)
 
 def locate(ui, repo, *pats, **opts):
     """locate files matching specific patterns"""
     end = opts['print0'] and '\0' or '\n'
 
     for src, abs, rel, exact in walk(repo, pats, opts, '(?:.*/|)'):
         if repo.dirstate.state(abs) == '?':
             continue
         if opts['fullpath']:
             ui.write(os.path.join(repo.root, abs), end)
         else:
             ui.write(rel, end)
 
 def log(ui, repo, *pats, **opts):
     """show revision history of entire repository or files"""
     class dui:
         # Implement and delegate some ui protocol.  Save hunks of
         # output for later display in the desired order.
         def __init__(self, ui):
             self.ui = ui
             self.hunk = {}
         def bump(self, rev):
             self.rev = rev
             self.hunk[rev] = []
         def note(self, *args):
             if self.verbose:
                 self.write(*args)
         def status(self, *args):
             if not self.quiet:
                 self.write(*args)
         def write(self, *args):
             self.hunk[self.rev].append(args)
         def __getattr__(self, key):
             return getattr(self.ui, key)
     cwd = repo.getcwd()
     if not pats and cwd:
         opts['include'] = [os.path.join(cwd, i) for i in opts['include']]
         opts['exclude'] = [os.path.join(cwd, x) for x in opts['exclude']]
     changeiter, getchange = walkchangerevs(ui, repo, (pats and cwd) or '',
                                            pats, opts)
     for st, rev, fns in changeiter:
         if st == 'window':
             du = dui(ui)
         elif st == 'add':
             du.bump(rev)
             br = None
             if opts['branch']:
                 br = repo.branchlookup([repo.changelog.node(rev)])
             show_changeset(du, repo, rev, brinfo=br)
             if opts['patch']:
                 changenode = repo.changelog.node(rev)
                 prev, other = repo.changelog.parents(changenode)
                 dodiff(du, du, repo, prev, changenode, fns)
                 du.write("\n\n")
         elif st == 'iter':
             for args in du.hunk[rev]:
                 ui.write(*args)
 
 def manifest(ui, repo, rev=None):
     """output the latest or given revision of the project manifest"""
     if rev:
         try:
             # assume all revision numbers are for changesets
             n = repo.lookup(rev)
             change = repo.changelog.read(n)
             n = change[0]
         except hg.RepoError:
             n = repo.manifest.lookup(rev)
     else:
         n = repo.manifest.tip()
     m = repo.manifest.read(n)
     mf = repo.manifest.readflags(n)
     files = m.keys()
     files.sort()
 
     for f in files:
         ui.write("%40s %3s %s\n" % (hex(m[f]), mf[f] and "755" or "644", f))
 
 def outgoing(ui, repo, dest="default-push", **opts):
     """show changesets not found in destination"""
     dest = ui.expandpath(dest)
     other = hg.repository(ui, dest)
     o = repo.findoutgoing(other)
     o = repo.newer(o)
     o.reverse()
     for n in o:
         show_changeset(ui, repo, changenode=n)
         if opts['patch']:
             prev = repo.changelog.parents(n)[0]
             dodiff(ui, ui, repo, prev, n)
             ui.write("\n")
 
 def parents(ui, repo, rev=None):
     """show the parents of the working dir or revision"""
     if rev:
         p = repo.changelog.parents(repo.lookup(rev))
     else:
         p = repo.dirstate.parents()
 
     for n in p:
         if n != nullid:
             show_changeset(ui, repo, changenode=n)
 
 def paths(ui, search=None):
     """show definition of symbolic path names"""
     try:
         repo = hg.repository(ui=ui)
     except hg.RepoError:
         pass
 
     if search:
         for name, path in ui.configitems("paths"):
             if name == search:
                 ui.write("%s\n" % path)
                 return
         ui.warn("not found!\n")
         return 1
     else:
         for name, path in ui.configitems("paths"):
             ui.write("%s = %s\n" % (name, path))
 
 def pull(ui, repo, source="default", **opts):
     """pull changes from the specified source"""
     source = ui.expandpath(source)
     ui.status('pulling from %s\n' % (source))
 
     if opts['ssh']:
         ui.setconfig("ui", "ssh", opts['ssh'])
     if opts['remotecmd']:
         ui.setconfig("ui", "remotecmd", opts['remotecmd'])
 
     other = hg.repository(ui, source)
     r = repo.pull(other)
     if not r:
         if opts['update']:
             return update(ui, repo)
         else:
             ui.status("(run 'hg update' to get a working copy)\n")
 
     return r
 
 def push(ui, repo, dest="default-push", force=False, ssh=None, remotecmd=None):
     """push changes to the specified destination"""
     dest = ui.expandpath(dest)
     ui.status('pushing to %s\n' % (dest))
 
     if ssh:
         ui.setconfig("ui", "ssh", ssh)
     if remotecmd:
         ui.setconfig("ui", "remotecmd", remotecmd)
 
     other = hg.repository(ui, dest)
     r = repo.push(other, force)
     return r
 
 def rawcommit(ui, repo, *flist, **rc):
     "raw commit interface"
     if rc['text']:
         ui.warn("Warning: -t and --text is deprecated,"
                 " please use -m or --message instead.\n")
     message = rc['message'] or rc['text']
     if not message and rc['logfile']:
         try:
             message = open(rc['logfile']).read()
         except IOError:
             pass
     if not message and not rc['logfile']:
         raise util.Abort("missing commit message")
 
     files = relpath(repo, list(flist))
     if rc['files']:
         files += open(rc['files']).read().splitlines()
 
     rc['parent'] = map(repo.lookup, rc['parent'])
 
     try:
         repo.rawcommit(files, message, rc['user'], rc['date'], *rc['parent'])
     except ValueError, inst:
         raise util.Abort(str(inst))
 
 def recover(ui, repo):
     """roll back an interrupted transaction"""
     repo.recover()
 
 def remove(ui, repo, pat, *pats, **opts):
     """remove the specified files on the next commit"""
     names = []
     def okaytoremove(abs, rel, exact):
         c, a, d, u = repo.changes(files = [abs])
         reason = None
         if c: reason = 'is modified'
         elif a: reason = 'has been marked for add'
         elif u: reason = 'not managed'
         if reason and exact:
             ui.warn('not removing %s: file %s\n' % (rel, reason))
         else:
             return True
     for src, abs, rel, exact in walk(repo, (pat,) + pats, opts):
         if okaytoremove(abs, rel, exact):
             if not exact: ui.status('removing %s\n' % rel)
             names.append(abs)
     repo.remove(names)
 
 def revert(ui, repo, *names, **opts):
     """revert modified files or dirs back to their unmodified states"""
     node = opts['rev'] and repo.lookup(opts['rev']) or \
            repo.dirstate.parents()[0]
     root = os.path.realpath(repo.root)
 
     def trimpath(p):
         p = os.path.realpath(p)
         if p.startswith(root):
             rest = p[len(root):]
             if not rest:
                 return rest
             if p.startswith(os.sep):
                 return rest[1:]
             return p
 
     relnames = map(trimpath, names or [os.getcwd()])
     chosen = {}
 
     def choose(name):
         def body(name):
             for r in relnames:
                 if not name.startswith(r):
                     continue
                 rest = name[len(r):]
                 if not rest:
                     return r, True
                 depth = rest.count(os.sep)
                 if not r:
                     if depth == 0 or not opts['nonrecursive']:
                         return r, True
                 elif rest[0] == os.sep:
                     if depth == 1 or not opts['nonrecursive']:
                         return r, True
             return None, False
         relname, ret = body(name)
         if ret:
             chosen[relname] = 1
         return ret
 
     r = repo.update(node, False, True, choose, False)
     for n in relnames:
         if n not in chosen:
             ui.warn('error: no matches for %s\n' % n)
             r = 1
     sys.stdout.flush()
     return r
 
 def root(ui, repo):
     """print the root (top) of the current working dir"""
     ui.write(repo.root + "\n")
 
 def serve(ui, repo, **opts):
     """export the repository via HTTP"""
 
     if opts["stdio"]:
         fin, fout = sys.stdin, sys.stdout
         sys.stdout = sys.stderr
 
         def getarg():
             argline = fin.readline()[:-1]
             arg, l = argline.split()
             val = fin.read(int(l))
             return arg, val
         def respond(v):
             fout.write("%d\n" % len(v))
             fout.write(v)
             fout.flush()
 
         lock = None
 
         while 1:
             cmd = fin.readline()[:-1]
             if cmd == '':
                 return
             if cmd == "heads":
                 h = repo.heads()
                 respond(" ".join(map(hex, h)) + "\n")
             if cmd == "lock":
                 lock = repo.lock()
                 respond("")
             if cmd == "unlock":
                 if lock:
                     lock.release()
                 lock = None
                 respond("")
             elif cmd == "branches":
                 arg, nodes = getarg()
                 nodes = map(bin, nodes.split(" "))
                 r = []
                 for b in repo.branches(nodes):
                     r.append(" ".join(map(hex, b)) + "\n")
                 respond("".join(r))
             elif cmd == "between":
                 arg, pairs = getarg()
                 pairs = [map(bin, p.split("-")) for p in pairs.split(" ")]
                 r = []
                 for b in repo.between(pairs):
                     r.append(" ".join(map(hex, b)) + "\n")
                 respond("".join(r))
             elif cmd == "changegroup":
                 nodes = []
                 arg, roots = getarg()
                 nodes = map(bin, roots.split(" "))
 
                 cg = repo.changegroup(nodes)
                 while 1:
                     d = cg.read(4096)
                     if not d:
                         break
                     fout.write(d)
 
                 fout.flush()
 
             elif cmd == "addchangegroup":
                 if not lock:
                     respond("not locked")
                     continue
                 respond("")
 
                 r = repo.addchangegroup(fin)
                 respond("")
 
     optlist = "name templates style address port ipv6 accesslog errorlog"
     for o in optlist.split():
         if opts[o]:
             ui.setconfig("web", o, opts[o])
 
     try:
         httpd = hgweb.create_server(repo)
     except socket.error, inst:
         raise util.Abort('cannot start server: ' + inst.args[1])
 
     if ui.verbose:
         addr, port = httpd.socket.getsockname()
         if addr == '0.0.0.0':
             addr = socket.gethostname()
         else:
             try:
                 addr = socket.gethostbyaddr(addr)[0]
             except socket.error:
                 pass
         if port != 80:
             ui.status('listening at http://%s:%d/\n' % (addr, port))
         else:
             ui.status('listening at http://%s/\n' % addr)
     httpd.serve_forever()
 
 def status(ui, repo, *pats, **opts):
     '''show changed files in the working directory
 
     M = modified
     A = added
     R = removed
     ? = not tracked
     '''
 
     cwd = repo.getcwd()
     files, matchfn, anypats = matchpats(repo, cwd, pats, opts)
     (c, a, d, u) = [[util.pathto(cwd, x) for x in n]
                     for n in repo.changes(files=files, match=matchfn)]
 
     changetypes = [('modified', 'M', c),
                    ('added', 'A', a),
                    ('removed', 'R', d),
                    ('unknown', '?', u)]
 
     end = opts['print0'] and '\0' or '\n'
 
     for opt, char, changes in ([ct for ct in changetypes if opts[ct[0]]]
                                or changetypes):
         if opts['no_status']:
             format = "%%s%s" % end
         else:
             format = "%s %%s%s" % (char, end);
 
         for f in changes:
             ui.write(format % f)
 
 def tag(ui, repo, name, rev=None, **opts):
     """add a tag for the current tip or a given revision"""
     if opts['text']:
         ui.warn("Warning: -t and --text is deprecated,"
                 " please use -m or --message instead.\n")
     if name == "tip":
         raise util.Abort("the name 'tip' is reserved")
     if rev:
         r = hex(repo.lookup(rev))
     else:
         r = hex(repo.changelog.tip())
 
     if name.find(revrangesep) >= 0:
         raise util.Abort("'%s' cannot be used in a tag name" % revrangesep)
 
     if opts['local']:
         repo.opener("localtags", "a").write("%s %s\n" % (r, name))
         return
 
     (c, a, d, u) = repo.changes()
     for x in (c, a, d, u):
         if ".hgtags" in x:
             raise util.Abort("working copy of .hgtags is changed "
                              "(please commit .hgtags manually)")
 
     repo.wfile(".hgtags", "ab").write("%s %s\n" % (r, name))
     if repo.dirstate.state(".hgtags") == '?':
         repo.add([".hgtags"])
 
     message = (opts['message'] or opts['text'] or
                "Added tag %s for changeset %s" % (name, r))
     try:
         repo.commit([".hgtags"], message, opts['user'], opts['date'])
     except ValueError, inst:
         raise util.Abort(str(inst))
 
 def tags(ui, repo):
     """list repository tags"""
 
     l = repo.tagslist()
     l.reverse()
     for t, n in l:
         try:
             r = "%5d:%s" % (repo.changelog.rev(n), hex(n))
         except KeyError:
             r = "    ?:?"
         ui.write("%-30s %s\n" % (t, r))
 
 def tip(ui, repo):
     """show the tip revision"""
     n = repo.changelog.tip()
     show_changeset(ui, repo, changenode=n)
 
 def unbundle(ui, repo, fname):
     """apply a changegroup file"""
     f = urllib.urlopen(fname)
 
     if f.read(4) != "HG10":
         raise util.Abort("%s: not a Mercurial bundle file" % fname)
 
     class bzread:
         def __init__(self, f):
             self.zd = bz2.BZ2Decompressor()
             self.f = f
             self.buf = ""
         def read(self, l):
             while l > len(self.buf):
                 r = self.f.read(4096)
                 if r:
                     self.buf += self.zd.decompress(r)
                 else:
                     break
             d, self.buf = self.buf[:l], self.buf[l:]
             return d
 
     repo.addchangegroup(bzread(f))
 
 def undo(ui, repo):
     """undo the last commit or pull
 
     Roll back the last pull or commit transaction on the
     repository, restoring the project to its earlier state.
 
     This command should be used with care. There is only one level of
     undo and there is no redo.
 
     This command is not intended for use on public repositories. Once
     a change is visible for pull by other users, undoing it locally is
     ineffective.
     """
     repo.undo()
 
 def update(ui, repo, node=None, merge=False, clean=False, branch=None):
     '''update or merge working directory
 
     If there are no outstanding changes in the working directory and
     there is a linear relationship between the current version and the
     requested version, the result is the requested version.
 
     Otherwise the result is a merge between the contents of the
     current working directory and the requested version. Files that
     changed between either parent are marked as changed for the next
     commit and a commit must be performed before any further updates
     are allowed.
     '''
     if branch:
         br = repo.branchlookup(branch=branch)
         found = []
         for x in br:
             if branch in br[x]:
                 found.append(x)
         if len(found) > 1:
             ui.warn("Found multiple heads for %s\n" % branch)
             for x in found:
                 show_changeset(ui, repo, changenode=x, brinfo=br)
             return 1
         if len(found) == 1:
             node = found[0]
             ui.warn("Using head %s for branch %s\n" % (short(node), branch))
         else:
             ui.warn("branch %s not found\n" % (branch))
             return 1
     else:
         node = node and repo.lookup(node) or repo.changelog.tip()
     return repo.update(node, allow=merge, force=clean)
 
 def verify(ui, repo):
     """verify the integrity of the repository"""
     return repo.verify()
 
 # Command options and aliases are listed here, alphabetically
 
 table = {
     "^add":
         (add,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          "hg add [OPTION]... [FILE]..."),
     "addremove":
         (addremove,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          "hg addremove [OPTION]... [FILE]..."),
     "^annotate":
         (annotate,
          [('r', 'rev', '', 'revision'),
           ('a', 'text', None, 'treat all files as text'),
           ('u', 'user', None, 'show user'),
           ('n', 'number', None, 'show revision number'),
           ('c', 'changeset', None, 'show changeset'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          'hg annotate [OPTION]... FILE...'),
     "bundle":
         (bundle,
          [],
          'hg bundle FILE DEST'),
     "cat":
         (cat,
          [('o', 'output', "", 'output to file')],
          'hg cat [-o OUTFILE] FILE [REV]'),
     "^clone":
         (clone,
          [('U', 'noupdate', None, 'skip update after cloning'),
           ('e', 'ssh', "", 'ssh command'),
           ('', 'remotecmd', "", 'remote hg command')],
          'hg clone [OPTION]... SOURCE [DEST]'),
     "^commit|ci":
         (commit,
          [('A', 'addremove', None, 'run add/remove during commit'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search'),
           ('m', 'message', "", 'commit message'),
           ('t', 'text', "", 'commit message (deprecated: use -m)'),
           ('l', 'logfile', "", 'commit message file'),
           ('d', 'date', "", 'date code'),
           ('u', 'user', "", 'user')],
          'hg commit [OPTION]... [FILE]...'),
     "copy": (copy, [], 'hg copy SOURCE DEST'),
     "debugcheckstate": (debugcheckstate, [], 'debugcheckstate'),
     "debugconfig": (debugconfig, [], 'debugconfig'),
     "debugstate": (debugstate, [], 'debugstate'),
     "debugdata": (debugdata, [], 'debugdata FILE REV'),
     "debugindex": (debugindex, [], 'debugindex FILE'),
     "debugindexdot": (debugindexdot, [], 'debugindexdot FILE'),
     "debugrename": (debugrename, [], 'debugrename FILE [REV]'),
     "debugwalk":
         (debugwalk,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          'debugwalk [OPTION]... [FILE]...'),
     "^diff":
         (diff,
          [('r', 'rev', [], 'revision'),
           ('a', 'text', None, 'treat all files as text'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          'hg diff [-a] [-I] [-X] [-r REV1 [-r REV2]] [FILE]...'),
     "^export":
         (export,
          [('o', 'output', "", 'output to file'),
           ('a', 'text', None, 'treat all files as text')],
          "hg export [-a] [-o OUTFILE] REV..."),
     "forget":
         (forget,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          "hg forget [OPTION]... FILE..."),
     "grep":
         (grep,
          [('0', 'print0', None, 'end fields with NUL'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'include path in search'),
           ('', 'all', None, 'print all revisions with matches'),
           ('i', 'ignore-case', None, 'ignore case when matching'),
           ('l', 'files-with-matches', None, 'print names of files and revs with matches'),
           ('n', 'line-number', None, 'print line numbers'),
           ('r', 'rev', [], 'search in revision rev'),
           ('u', 'user', None, 'print user who made change')],
          "hg grep [OPTION]... PATTERN [FILE]..."),
     "heads":
         (heads,
          [('b', 'branches', None, 'find branch info')],
          'hg heads [-b]'),
     "help": (help_, [], 'hg help [COMMAND]'),
     "identify|id": (identify, [], 'hg identify'),
     "import|patch":
         (import_,
          [('p', 'strip', 1, 'path strip'),
           ('f', 'force', None, 'skip check for outstanding changes'),
           ('b', 'base', "", 'base path')],
          "hg import [-f] [-p NUM] [-b BASE] PATCH..."),
     "incoming|in": (incoming, 
          [('p', 'patch', None, 'show patch')],
          'hg incoming [-p] [SOURCE]'),
     "^init": (init, [], 'hg init [DEST]'),
     "locate":
         (locate,
          [('r', 'rev', '', 'revision'),
           ('0', 'print0', None, 'end filenames with NUL'),
           ('f', 'fullpath', None, 'print complete paths'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          'hg locate [OPTION]... [PATTERN]...'),
     "^log|history":
         (log,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search'),
           ('b', 'branch', None, 'show branches'),
           ('r', 'rev', [], 'revision'),
           ('p', 'patch', None, 'show patch')],
          'hg log [-I] [-X] [-r REV]... [-p] [FILE]'),
     "manifest": (manifest, [], 'hg manifest [REV]'),
     "outgoing|out": (outgoing, 
          [('p', 'patch', None, 'show patch')],
          'hg outgoing [-p] [DEST]'),
     "parents": (parents, [], 'hg parents [REV]'),
     "paths": (paths, [], 'hg paths [NAME]'),
     "^pull":
         (pull,
          [('u', 'update', None, 'update working directory'),
           ('e', 'ssh', "", 'ssh command'),
           ('', 'remotecmd', "", 'remote hg command')],
          'hg pull [-u] [-e FILE] [--remotecmd FILE] [SOURCE]'),
     "^push":
         (push,
          [('f', 'force', None, 'force push'),
           ('e', 'ssh', "", 'ssh command'),
           ('', 'remotecmd', "", 'remote hg command')],
          'hg push [-f] [-e FILE] [--remotecmd FILE] [DEST]'),
     "rawcommit":
         (rawcommit,
          [('p', 'parent', [], 'parent'),
           ('d', 'date', "", 'date code'),
           ('u', 'user', "", 'user'),
           ('F', 'files', "", 'file list'),
           ('m', 'message', "", 'commit message'),
           ('t', 'text', "", 'commit message (deprecated: use -m)'),
           ('l', 'logfile', "", 'commit message file')],
          'hg rawcommit [OPTION]... [FILE]...'),
     "recover": (recover, [], "hg recover"),
     "^remove|rm": (remove,
                    [('I', 'include', [], 'include path in search'),
                     ('X', 'exclude', [], 'exclude path from search')],
                    "hg remove [OPTION]... FILE..."),
     "^revert":
         (revert,
          [("n", "nonrecursive", None, "don't recurse into subdirs"),
           ("r", "rev", "", "revision")],
          "hg revert [-n] [-r REV] [NAME]..."),
     "root": (root, [], "hg root"),
     "^serve":
         (serve,
          [('A', 'accesslog', '', 'access log file'),
           ('E', 'errorlog', '', 'error log file'),
           ('p', 'port', 0, 'listen port'),
           ('a', 'address', '', 'interface address'),
           ('n', 'name', "", 'repository name'),
           ('', 'stdio', None, 'for remote clients'),
           ('t', 'templates', "", 'template directory'),
           ('', 'style', "", 'template style'),
           ('6', 'ipv6', None, 'use IPv6 in addition to IPv4')],
          "hg serve [OPTION]..."),
     "^status":
         (status,
          [('m', 'modified', None, 'show only modified files'),
           ('a', 'added', None, 'show only added files'),
           ('r', 'removed', None, 'show only removed files'),
           ('u', 'unknown', None, 'show only unknown (not tracked) files'),
           ('n', 'no-status', None, 'hide status prefix'),
           ('0', 'print0', None, 'end filenames with NUL'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          "hg status [OPTION]... [FILE]..."),
     "tag":
         (tag,
          [('l', 'local', None, 'make the tag local'),
           ('m', 'message', "", 'commit message'),
           ('t', 'text', "", 'commit message (deprecated: use -m)'),
           ('d', 'date', "", 'date code'),
           ('u', 'user', "", 'user')],
          'hg tag [OPTION]... NAME [REV]'),
     "tags": (tags, [], 'hg tags'),
     "tip": (tip, [], 'hg tip'),
     "unbundle":
         (unbundle,
          [],
          'hg unbundle FILE'),
     "undo": (undo, [], 'hg undo'),
     "^update|up|checkout|co":
         (update,
          [('b', 'branch', "", 'checkout the head of a specific branch'),
           ('m', 'merge', None, 'allow merging of conflicts'),
           ('C', 'clean', None, 'overwrite locally modified files')],
          'hg update [-b TAG] [-m] [-C] [REV]'),
     "verify": (verify, [], 'hg verify'),
     "version": (show_version, [], 'hg version'),
 }
 
 globalopts = [
     ('R', 'repository', "", 'repository root directory'),
     ('', 'cwd', '', 'change working directory'),
     ('y', 'noninteractive', None, 'run non-interactively'),
     ('q', 'quiet', None, 'quiet mode'),
     ('v', 'verbose', None, 'verbose mode'),
     ('', 'debug', None, 'debug mode'),
     ('', 'debugger', None, 'start debugger'),
     ('', 'traceback', None, 'print traceback on exception'),
     ('', 'time', None, 'time how long the command takes'),
     ('', 'profile', None, 'profile'),
     ('', 'version', None, 'output version information and exit'),
     ('h', 'help', None, 'display help and exit'),
 ]
 
 norepo = ("clone init version help debugconfig debugdata"
           " debugindex debugindexdot paths")
 
 def find(cmd):
     for e in table.keys():
         if re.match("(%s)$" % e, cmd):
             return e, table[e]
 
     raise UnknownCommand(cmd)
 
 class SignalInterrupt(Exception):
     """Exception raised on SIGTERM and SIGHUP."""
 
 def catchterm(*args):
     raise SignalInterrupt
 
 def run():
     sys.exit(dispatch(sys.argv[1:]))
 
 class ParseError(Exception):
     """Exception raised on errors in parsing the command line."""
 
 def parse(args):
     options = {}
     cmdoptions = {}
 
     try:
         args = fancyopts.fancyopts(args, globalopts, options)
     except fancyopts.getopt.GetoptError, inst:
         raise ParseError(None, inst)
 
     if args:
         cmd, args = args[0], args[1:]
         i = find(cmd)[1]
         c = list(i[1])
     else:
         cmd = None
         c = []
 
     # combine global options into local
     for o in globalopts:
         c.append((o[0], o[1], options[o[1]], o[3]))
 
     try:
         args = fancyopts.fancyopts(args, c, cmdoptions)
     except fancyopts.getopt.GetoptError, inst:
         raise ParseError(cmd, inst)
 
     # separate global options back out
     for o in globalopts:
         n = o[1]
         options[n] = cmdoptions[n]
         del cmdoptions[n]
 
     return (cmd, cmd and i[0] or None, args, options, cmdoptions)
 
 def dispatch(args):
     signal.signal(signal.SIGTERM, catchterm)
     try:
         signal.signal(signal.SIGHUP, catchterm)
     except AttributeError:
         pass
 
     u = ui.ui()
     external = []
     for x in u.extensions():
         if x[1]:
             mod = imp.load_source(x[0], x[1])
         else:
             def importh(name):
                 mod = __import__(name)
                 components = name.split('.')
                 for comp in components[1:]:
                     mod = getattr(mod, comp)
                 return mod
             mod = importh(x[0])
         external.append(mod)
     for x in external:
         for t in x.cmdtable:
             if t in table:
                 u.warn("module %s override %s\n" % (x.__name__, t))
         table.update(x.cmdtable)
 
     try:
         cmd, func, args, options, cmdoptions = parse(args)
     except ParseError, inst:
         if inst.args[0]:
             u.warn("hg %s: %s\n" % (inst.args[0], inst.args[1]))
             help_(u, inst.args[0])
         else:
             u.warn("hg: %s\n" % inst.args[1])
             help_(u, 'shortlist')
         sys.exit(-1)
     except UnknownCommand, inst:
         u.warn("hg: unknown command '%s'\n" % inst.args[0])
         help_(u, 'shortlist')
         sys.exit(1)
 
     if options["time"]:
         def get_times():
             t = os.times()
             if t[4] == 0.0: # Windows leaves this as zero, so use time.clock()
                 t = (t[0], t[1], t[2], t[3], time.clock())
             return t
         s = get_times()
         def print_time():
             t = get_times()
             u.warn("Time: real %.3f secs (user %.3f+%.3f sys %.3f+%.3f)\n" %
                 (t[4]-s[4], t[0]-s[0], t[2]-s[2], t[1]-s[1], t[3]-s[3]))
         atexit.register(print_time)
 
     u.updateopts(options["verbose"], options["debug"], options["quiet"],
               not options["noninteractive"])
 
     # enter the debugger before command execution
     if options['debugger']:
         pdb.set_trace()
 
     try:
         try:
             if options['help']:
                 help_(u, cmd, options['version'])
                 sys.exit(0)
             elif options['version']:
                 show_version(u)
                 sys.exit(0)
             elif not cmd:
                 help_(u, 'shortlist')
                 sys.exit(0)
 
             if options['cwd']:
                 try:
                     os.chdir(options['cwd'])
                 except OSError, inst:
                     raise util.Abort('%s: %s' %
                                      (options['cwd'], inst.strerror))
 
             if cmd not in norepo.split():
                 path = options["repository"] or ""
                 repo = hg.repository(ui=u, path=path)
                 for x in external:
                     x.reposetup(u, repo)
                 d = lambda: func(u, repo, *args, **cmdoptions)
             else:
                 d = lambda: func(u, *args, **cmdoptions)
 
             if options['profile']:
                 import hotshot, hotshot.stats
                 prof = hotshot.Profile("hg.prof")
                 r = prof.runcall(d)
                 prof.close()
                 stats = hotshot.stats.load("hg.prof")
                 stats.strip_dirs()
                 stats.sort_stats('time', 'calls')
                 stats.print_stats(40)
                 return r
             else:
                 return d()
         except:
             # enter the debugger when we hit an exception
             if options['debugger']:
                 pdb.post_mortem(sys.exc_info()[2])
             if options['traceback']:
                 traceback.print_exc()
             raise
     except hg.RepoError, inst:
         u.warn("abort: ", inst, "!\n")
     except revlog.RevlogError, inst:
         u.warn("abort: ", inst, "!\n")
     except SignalInterrupt:
         u.warn("killed!\n")
     except KeyboardInterrupt:
         try:
             u.warn("interrupted!\n")
         except IOError, inst:
             if inst.errno == errno.EPIPE:
                 if u.debugflag:
                     u.warn("\nbroken pipe\n")
             else:
                 raise
     except IOError, inst:
         if hasattr(inst, "code"):
             u.warn("abort: %s\n" % inst)
         elif hasattr(inst, "reason"):
             u.warn("abort: error: %s\n" % inst.reason[1])
         elif hasattr(inst, "args") and inst[0] == errno.EPIPE:
             if u.debugflag:
                 u.warn("broken pipe\n")
         else:
             raise
     except OSError, inst:
         if hasattr(inst, "filename"):
             u.warn("abort: %s: %s\n" % (inst.strerror, inst.filename))
         else:
             u.warn("abort: %s\n" % inst.strerror)
     except util.Abort, inst:
         u.warn('abort: ', inst.args[0] % inst.args[1:], '\n')
         sys.exit(1)
     except TypeError, inst:
         # was this an argument error?
         tb = traceback.extract_tb(sys.exc_info()[2])
         if len(tb) > 2: # no
             raise
         u.debug(inst, "\n")
         u.warn("%s: invalid arguments\n" % cmd)
         help_(u, cmd)
     except UnknownCommand, inst:
         u.warn("hg: unknown command '%s'\n" % inst.args[0])
         help_(u, 'shortlist')
     except SystemExit:
         # don't catch this in the catch-all below
         raise
     except:
         u.warn("** unknown exception encountered, details follow\n")
         u.warn("** report bug details to [e-mail]\n")
         raise
 
     sys.exit(-1)