# commands.py - command processing for mercurial
#
# Copyright 2005 Matt Mackall <mpm@selenic.com>
#
# 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(globals(), "os re sys signal")
demandload(globals(), "fancyopts ui hg util")
demandload(globals(), "fnmatch hgweb mdiff random signal time traceback")
demandload(globals(), "errno socket version struct")

class UnknownCommand(Exception): pass

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 relfilter(repo, files):
    cwd = repo.getcwd()
    if cwd:
        return filterfiles([util.pconvert(cwd)], files)
    return files

def relpath(repo, args):
    cwd = repo.getcwd()
    if cwd:
        return [ util.pconvert(os.path.normpath(os.path.join(cwd, x))) for x in args ]
    return args

revrangesep = ':'

def revrange(ui, repo, revs = [], revlog = None):
    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:
                    ui.warn('abort: invalid revision identifier %s\n' % val)
                    sys.exit(1)
        return num
    for spec in revs:
        if spec.find(revrangesep) >= 0:
            start, end = spec.split(revrangesep, 1)
            start = fix(start, 0)
            end = fix(end, revcount - 1)
            if end > start:
                end += 1
                step = 1
            else:
                end -= 1
                step = -1
            for rev in xrange(start, end, step):
                yield str(rev)
        else:
            yield spec

def make_filename(repo, r, pat, node=None,
                  total=None, seqno=None, revwidth=None):
    node_expander = {
        'H': lambda: hg.hex(node),
        'R': lambda: str(r.rev(node)),
        'h': lambda: hg.short(node),
        }
    expander = {
        '%': lambda: '%',
        'b': lambda: os.path.basename(repo.root),
        }

    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)

def dodiff(fp, ui, repo, files = None, node1 = None, node2 = None):
    def date(c):
        return time.asctime(time.gmtime(float(c[2].split(' ')[0])))

    (c, a, d, u) = repo.changes(node1, node2, files)
    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])
        def read(f): return repo.file(f).read(mmap2[f])
        date2 = date(change)
    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 hg.hex or hg.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))
    for f in a:
        to = None
        tn = read(f)
        fp.write(mdiff.unidiff(to, date1, tn, date2, f, r))
    for f in d:
        to = repo.file(f).read(mmap[f])
        tn = None
        fp.write(mdiff.unidiff(to, date1, tn, date2, f, r))

def show_changeset(ui, repo, rev=0, changenode=None, filelog=None):
    """show a single changeset or file revision"""
    changelog = repo.changelog
    if filelog:
        log = filelog
        filerev = rev
        node = filenode = filelog.node(filerev)
        changerev = filelog.linkrev(filenode)
        changenode = changenode or changelog.node(changerev)
    else:
        log = changelog
        changerev = rev
        if changenode is None:
            changenode = changelog.node(changerev)
        elif not changerev:
            rev = changerev = changelog.rev(changenode)
        node = changenode

    if ui.quiet:
        ui.write("%d:%s\n" % (rev, hg.hex(node)))
        return

    changes = changelog.read(changenode)

    parents = [(log.rev(parent), hg.hex(parent))
               for parent in log.parents(node)
               if ui.debugflag or parent != hg.nullid]
    if not ui.debugflag and len(parents) == 1 and parents[0][0] == rev-1:
        parents = []

    ui.write("changeset:   %d:%s\n" % (changerev, hg.hex(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 filelog:
        ui.debug("file rev:    %d:%s\n" % (filerev, hg.hex(filenode)))
    ui.note("manifest:    %d:%s\n" % (repo.manifest.rev(changes[0]),
                                      hg.hex(changes[0])))
    ui.status("user:        %s\n" % changes[1])
    ui.status("date:        %s\n" % time.asctime(
        time.localtime(float(changes[2].split(' ')[0]))))
    if ui.debugflag:
        files = repo.changes(changelog.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 version %s\n" % version.get_version())
    ui.status(
        "\nCopyright (C) 2005 Matt Mackall <mpm@selenic.com>\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):
    '''show help for a given command or all commands'''
    if cmd:
        try:
            i = find(cmd)
            ui.write("%s\n\n" % i[2])

            if i[1]:
                for s, l, d, c in i[1]:
                    opt=' '
                    if s: opt = opt + '-' + s + ' '
                    if l: opt = opt + '--' + l + ' '
                    if d: opt = opt + '(' + str(d) + ')'
                    ui.write(opt, "\n")
                    if c: ui.write('   %s\n' % c)
                ui.write("\n")

            ui.write(i[0].__doc__, "\n")
        except UnknownCommand:
            ui.warn("hg: unknown command %s\n" % cmd)
        sys.exit(0)
    else:
        if ui.verbose:
            show_version(ui)
            ui.write('\n')
        if ui.verbose:
            ui.write('hg commands:\n\n')
        else:
            ui.write('basic hg commands (use "hg help -v" for more):\n\n')

        h = {}
        for c, e in table.items():
            f = c.split("|")[0]
            if not ui.verbose and not f.startswith("^"):
                continue
            if not ui.debugflag and f.startswith("debug"):
                continue
            f = f.lstrip("^")
            d = ""
            if e[0].__doc__:
                d = e[0].__doc__.splitlines(0)[0].rstrip()
            h[f] = d

        fns = h.keys()
        fns.sort()
        m = max(map(len, fns))
        for f in fns:
            ui.write(' %-*s   %s\n' % (m, f, h[f]))

# Commands start here, listed alphabetically

def add(ui, repo, file, *files):
    '''add the specified files on the next commit'''
    repo.add(relpath(repo, (file,) + files))

def addremove(ui, repo, *files):
    """add all new files, delete all missing files"""
    if files:
        files = relpath(repo, files)
        d = []
        u = []
        for f in files:
            p = repo.wjoin(f)
            s = repo.dirstate.state(f)
            isfile = os.path.isfile(p)
            if s != 'r' and not isfile:
                d.append(f)
            elif s not in 'nmai' and isfile:
                u.append(f)
    else:
        (c, a, d, u) = repo.changes(None, None)
    repo.add(u)
    repo.remove(d)

def annotate(u, repo, file, *files, **ops):
    """show changeset information per file line"""
    def getnode(rev):
        return hg.short(repo.changelog.node(rev))

    def getname(rev):
        try:
            return bcache[rev]
        except KeyError:
            cl = repo.changelog.read(repo.changelog.node(rev))
            name = cl[1]
            f = name.find('@')
            if f >= 0:
                name = name[:f]
            f = name.find('<')
            if f >= 0:
                name = name[f+1:]
            bcache[rev] = name
            return name

    bcache = {}
    opmap = [['user', getname], ['number', str], ['changeset', getnode]]
    if not ops['user'] and not ops['changeset']:
        ops['number'] = 1

    node = repo.dirstate.parents()[0]
    if ops['revision']:
        node = repo.changelog.lookup(ops['revision'])
    change = repo.changelog.read(node)
    mmap = repo.manifest.read(change[0])
    for f in relpath(repo, (file,) + files):
        lines = repo.file(f).annotate(mmap[f])
        pieces = []

        for o, f in opmap:
            if ops[o]:
                l = [ f(n) for n,t in lines ]
                m = max(map(len, l))
                pieces.append([ "%*s" % (m, x) for x in l])

        for p,l in zip(zip(*pieces), lines):
            u.write(" ".join(p) + ": " + l[1])

def cat(ui, repo, file, rev = [], **opts):
    """output the latest or given revision of a file"""
    r = repo.file(relpath(repo, [file])[0])
    n = r.tip()
    if rev: n = r.lookup(rev)
    if opts['output'] and opts['output'] != '-':
        try:
            outname = make_filename(repo, r, opts['output'], node=n)
            fp = open(outname, 'wb')
        except KeyError, inst:
            ui.warn("error: invlaid format spec '%%%s' in output file name\n" %
                    inst.args[0])
            sys.exit(1);
    else:
        fp = sys.stdout
    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):
        ui.warn("abort: destination '%s' already exists\n" % dest)
        return 1

    class dircleanup:
        def __init__(self, dir):
            import shutil
            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)

    d = dircleanup(dest)
    link = 0
    abspath = source
    source = ui.expandpath(source)
    other = hg.repository(ui, source)

    if other.dev() != -1:
        abspath = os.path.abspath(source)

    if other.dev() != -1 and os.stat(dest).st_dev == other.dev():
        ui.note("cloning by hardlink\n")
        util.system("cp -al '%s'/.hg '%s'/.hg" % (source, dest))
        try:
            os.remove(os.path.join(dest, ".hg", "dirstate"))
        except: pass

        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, *files, **opts):
    """commit the specified files or all outstanding changes"""
    text = opts['text']
    if not text and opts['logfile']:
        try: text = open(opts['logfile']).read()
        except IOError: pass

    if opts['addremove']:
        addremove(ui, repo, *files)
    repo.commit(relpath(repo, files), text, opts['user'], opts['date'])

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:
        ui.warn(".hg/dirstate inconsistent with current parent's manifest\n")
        sys.exit(1)

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 %s\n" % (dc[file][0], file))

def debugindex(ui, file):
    """dump the contents of an index file"""
    r = hg.revlog(hg.opener(""), file, "")
    ui.write("   rev    offset  length   base linkrev" +
             " p1           p2           nodeid\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],
            hg.hex(e[4][:5]), hg.hex(e[5][:5]), hg.hex(e[6][:5])))

def debugindexdot(ui, file):
    """dump an index DAG as a .dot file"""
    r = hg.revlog(hg.opener(""), 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] != hg.nullid:
            ui.write("\t%d -> %d\n" % (r.rev(e[5]), i))
    ui.write("}\n")

def diff(ui, repo, *files, **opts):
    """diff working directory (or selected files)"""
    revs = []
    if opts['rev']:
        revs = map(lambda x: repo.lookup(x), opts['rev'])

    if len(revs) > 2:
        ui.warn("too many revisions to diff\n")
        sys.exit(1)

    if files:
        files = relpath(repo, files)
    else:
        files = relpath(repo, [""])

    dodiff(sys.stdout, ui, repo, files, *revs)

def doexport(ui, repo, changeset, seqno, total, revwidth, opts):
    node = repo.lookup(changeset)
    prev, other = repo.changelog.parents(node)
    change = repo.changelog.read(node)

    if opts['output'] and opts['output'] != '-':
        try:
            outname = make_filename(repo, repo.changelog, opts['output'],
                                    node=node, total=total, seqno=seqno,
                                    revwidth=revwidth)
            fp = open(outname, 'wb')
        except KeyError, inst:
            ui.warn("error: invalid format spec '%%%s' in output file name\n" %
                    inst.args[0])
            sys.exit(1)
    else:
        fp = sys.stdout

    fp.write("# HG changeset patch\n")
    fp.write("# User %s\n" % change[1])
    fp.write("# Node ID %s\n" % hg.hex(node))
    fp.write("# Parent  %s\n" % hg.hex(prev))
    if other != hg.nullid:
        fp.write("# Parent  %s\n" % hg.hex(other))
    fp.write(change[4].rstrip())
    fp.write("\n\n")

    dodiff(fp, ui, repo, None, prev, node)

def export(ui, repo, *changesets, **opts):
    """dump the header and diffs for one or more changesets"""
    if not changesets:
        ui.warn("error: export requires at least one changeset\n")
        sys.exit(1)
    seqno = 0
    revs = list(revrange(ui, repo, changesets))
    total = len(revs)
    revwidth = max(len(revs[0]), len(revs[-1]))
    for cset in revs:
        seqno += 1
        doexport(ui, repo, cset, seqno, total, revwidth, opts)

def forget(ui, repo, file, *files):
    """don't add the specified files on the next commit"""
    repo.forget(relpath(repo, (file,) + files))

def heads(ui, repo):
    """show current repository heads"""
    for n in repo.changelog.heads():
        show_changeset(ui, repo, changenode=n)

def identify(ui, repo):
    """print information about the working copy"""
    parents = [p for p in repo.dirstate.parents() if p != hg.nullid]
    if not parents:
        ui.write("unknown\n")
        return

    hexfunc = ui.verbose and hg.hex or hg.short
    (c, a, d, u) = repo.changes(None, None)
    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 ' + '
        output.append(' + '.join(parenttags))

    ui.write("%s\n" % ' '.join(output))

def import_(ui, repo, patch1, *patches, **opts):
    """import an ordered set of patches"""
    try:
        import psyco
        psyco.full()
    except:
        pass

    patches = (patch1,) + patches

    d = opts["base"]
    strip = opts["strip"]

    for patch in patches:
        ui.status("applying %s\n" % patch)
        pf = os.path.join(d, patch)

        text = ""
        for l in file(pf):
            if l.startswith("--- ") or l.startswith("diff -r"): break
            text += l

        # parse values that exist when importing the result of an hg export
        hgpatch = user = snippet = None
        ui.debug('text:\n')
        for t in text.splitlines():
            ui.debug(t,'\n')
            if t == '# HG changeset patch' or hgpatch == True:
                hgpatch = True
                if t.startswith("# User "):
                    user = t[7:]
                    ui.debug('User: %s\n' % user)
                if not t.startswith("# ") and t.strip() and not snippet: snippet = t
        if snippet: text = snippet + '\n' + text
        ui.debug('text:\n%s\n' % text)

        # make sure text isn't empty
        if not text: text = "imported patch %s\n" % patch

        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:
            sys.stderr.write("patch failed")
            sys.exit(1)

        if len(files) > 0:
            addremove(ui, repo, *files)
        repo.commit(files, text, user)

def init(ui, source=None):
    """create a new repository in the current directory"""

    if source:
        ui.warn("no longer supported: use \"hg clone\" instead\n")
        sys.exit(1)
    repo = hg.repository(ui, ".", create=1)

def locate(ui, repo, *pats, **opts):
    """locate files matching specific patterns"""
    if [p for p in pats if os.sep in p]:
        ui.warn("error: patterns may not contain '%s'\n" % os.sep)
        ui.warn("use '-i <dir>' instead\n")
        sys.exit(1)
    def compile(pats, head = '^', tail = os.sep, on_empty = True):
        if not pats:
            class c:
                def match(self, x): return on_empty
            return c()
        regexp = r'%s(?:%s)%s' % (
            head,
            '|'.join([fnmatch.translate(os.path.normpath(os.path.normcase(p)))[:-1]
                      for p in pats]),
            tail)
        return re.compile(regexp)
    exclude = compile(opts['exclude'], on_empty = False)
    include = compile(opts['include'])
    pat = compile([os.path.normcase(p) for p in pats], head = '', tail = '$')
    end = '\n'
    if opts['print0']: end = '\0'
    if opts['rev']: node = repo.manifest.lookup(opts['rev'])
    else: node = repo.manifest.tip()
    manifest = repo.manifest.read(node)
    cwd = repo.getcwd()
    cwd_plus = cwd and (cwd + os.sep)
    found = []
    for f in manifest:
        f = os.path.normcase(f)
        if exclude.match(f) or not(include.match(f) and
                                   f.startswith(cwd_plus) and
                                   pat.match(os.path.basename(f))): continue
        if opts['fullpath']: f = os.path.join(repo.root, f)
        elif cwd: f = f[len(cwd_plus):]
        found.append(f)
    found.sort()
    for f in found: ui.write(f, end)

def log(ui, repo, f=None, **opts):
    """show the revision history of the repository or a single file"""
    if f:
        files = relpath(repo, [f])
        filelog = repo.file(files[0])
        log = filelog
        lookup = filelog.lookup
    else:
        files = None
        filelog = None
        log = repo.changelog
        lookup = repo.lookup
    revlist = []
    revs = [log.rev(lookup(rev)) for rev in opts['rev']]
    while revs:
        if len(revs) == 1:
            revlist.append(revs.pop(0))
        else:
            a = revs.pop(0)
            b = revs.pop(0)
            off = a > b and -1 or 1
            revlist.extend(range(a, b + off, off))

    for i in revlist or range(log.count() - 1, -1, -1):
        show_changeset(ui, repo, filelog=filelog, rev=i)
        if opts['patch']:
            if filelog:
                filenode = filelog.node(i)
                i = filelog.linkrev(filenode)
            changenode = repo.changelog.node(i)
            prev, other = repo.changelog.parents(changenode)
            dodiff(sys.stdout, ui, repo, files, prev, changenode)
            ui.write("\n")
        ui.write("\n")

def manifest(ui, repo, rev = []):
    """output the latest or given revision of the project manifest"""
    n = repo.manifest.tip()
    if rev:
        try:
            # assume all revision numbers are for changesets
            n = repo.lookup(rev)
            change = repo.changelog.read(n)
            n = change[0]
        except:
            n = repo.manifest.lookup(rev)

    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" % (hg.hex(m[f]), mf[f] and "755" or "644", f))

def parents(ui, repo, node = None):
    '''show the parents of the current working dir'''
    if node:
        p = repo.changelog.parents(repo.lookup(hg.bin(node)))
    else:
        p = repo.dirstate.parents()

    for n in p:
        if n != hg.nullid:
            show_changeset(ui, repo, changenode=n)

def pull(ui, repo, source="default", **opts):
    """pull changes from the specified source"""
    source = ui.expandpath(source)
    ui.status('pulling from %s\n' % (source))

    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"):
    """push changes to the specified destination"""
    dest = ui.expandpath(dest)
    ui.status('pushing to %s\n' % (dest))

    other = hg.repository(ui, dest)
    r = repo.push(other)
    return r

def rawcommit(ui, repo, *flist, **rc):
    "raw commit interface"

    text = rc['text']
    if not text and rc['logfile']:
        try: text = open(rc['logfile']).read()
        except IOError: pass
    if not text and not rc['logfile']:
        ui.warn("abort: missing commit text\n")
        return 1

    files = relpath(repo, list(flist))
    if rc['files']:
        files += open(rc['files']).read().splitlines()

    rc['parent'] = map(repo.lookup, rc['parent'])

    repo.rawcommit(files, text, rc['user'], rc['date'], *rc['parent'])

def recover(ui, repo):
    """roll back an interrupted transaction"""
    repo.recover()

def remove(ui, repo, file, *files):
    """remove the specified files on the next commit"""
    repo.remove(relpath(repo, (file,) + files))

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(hg.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(hg.bin, nodes.split(" "))
                r = []
                for b in repo.branches(nodes):
                    r.append(" ".join(map(hg.hex, b)) + "\n")
                respond("".join(r))
            elif cmd == "between":
                arg, pairs = getarg()
                pairs = [ map(hg.bin, p.split("-")) for p in pairs.split(" ") ]
                r = []
                for b in repo.between(pairs):
                    r.append(" ".join(map(hg.hex, b)) + "\n")
                respond("".join(r))
            elif cmd == "changegroup":
                nodes = []
                arg, roots = getarg()
                nodes = map(hg.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("")

    def openlog(opt, default):
        if opts[opt] and opts[opt] != '-': return open(opts[opt], 'w')
        else: return default

    httpd = hgweb.create_server(repo.root, opts["name"], opts["templates"],
                                opts["address"], opts["port"],
                                openlog('accesslog', sys.stdout),
                                openlog('errorlog', sys.stderr))
    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: 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):
    '''show changed files in the working directory

    C = changed
    A = added
    R = removed
    ? = not tracked'''

    (c, a, d, u) = repo.changes(None, None)
    (c, a, d, u) = map(lambda x: relfilter(repo, x), (c, a, d, u))

    for f in c: ui.write("C ", f, "\n")
    for f in a: ui.write("A ", f, "\n")
    for f in d: ui.write("R ", f, "\n")
    for f in u: ui.write("? ", f, "\n")

def tag(ui, repo, name, rev = None, **opts):
    """add a tag for the current tip or a given revision"""

    if name == "tip":
        ui.warn("abort: 'tip' is a reserved name!\n")
        return -1
    if rev:
        r = hg.hex(repo.lookup(rev))
    else:
        r = hg.hex(repo.changelog.tip())

    if name.find(revrangesep) >= 0:
        ui.warn("abort: '%s' cannot be used in a tag name\n" % revrangesep)
        return -1

    if opts['local']:
        repo.opener("localtags", "a").write("%s %s\n" % (r, name))
        return

    (c, a, d, u) = repo.changes(None, None)
    for x in (c, a, d, u):
        if ".hgtags" in x:
            ui.warn("abort: working copy of .hgtags is changed!\n")
            ui.status("(please commit .hgtags manually)\n")
            return -1

    add = 0
    if not os.path.exists(repo.wjoin(".hgtags")): add = 1
    repo.wfile(".hgtags", "ab").write("%s %s\n" % (r, name))
    if add: repo.add([".hgtags"])

    if not opts['text']:
        opts['text'] = "Added tag %s for changeset %s" % (name, r)

    repo.commit([".hgtags"], opts['text'], opts['user'], opts['date'])

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), hg.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 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):
    '''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.
    '''
    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, [], "hg add [files]"),
    "addremove": (addremove, [], "hg addremove [files]"),
    "^annotate": (annotate,
                     [('r', 'revision', '', 'revision'),
                      ('u', 'user', None, 'show user'),
                      ('n', 'number', None, 'show revision number'),
                      ('c', 'changeset', None, 'show changeset')],
                     'hg annotate [-u] [-c] [-n] [-r id] [files]'),
    "cat": (cat, [('o', 'output', "", 'output to file')], 'hg cat [-o outfile] <file> [rev]'),
    "^clone": (clone, [('U', 'noupdate', None, 'skip update after cloning')],
              'hg clone [options] <source> [dest]'),
    "^commit|ci": (commit,
                  [('t', 'text', "", 'commit text'),
                   ('A', 'addremove', None, 'run add/remove during commit'),
                   ('l', 'logfile', "", 'commit text file'),
                   ('d', 'date', "", 'date code'),
                   ('u', 'user', "", 'user')],
                  'hg commit [files]'),
    "copy": (copy, [], 'hg copy <source> <dest>'),
    "debugcheckstate": (debugcheckstate, [], 'debugcheckstate'),
    "debugstate": (debugstate, [], 'debugstate'),
    "debugindex": (debugindex, [], 'debugindex <file>'),
    "debugindexdot": (debugindexdot, [], 'debugindexdot <file>'),
    "^diff": (diff, [('r', 'rev', [], 'revision')],
             'hg diff [-r A] [-r B] [files]'),
    "^export": (export, [('o', 'output', "", 'output to file')],
               "hg export [-o file] <changeset> ..."),
    "forget": (forget, [], "hg forget [files]"),
    "heads": (heads, [], 'hg heads'),
    "help": (help, [], 'hg help [command]'),
    "identify|id": (identify, [], 'hg identify'),
    "import|patch": (import_,
                     [('p', 'strip', 1, 'path strip'),
                      ('b', 'base', "", 'base path')],
                     "hg import [options] <patches>"),
    "^init": (init, [], 'hg init'),
    "locate": (locate,
               [('0', 'print0', None, 'end records with NUL'),
                ('f', 'fullpath', None, 'print complete paths'),
                ('i', 'include', [], 'include path in search'),
                ('r', 'rev', '', 'revision'),
                ('x', 'exclude', [], 'exclude path from search')],
               'hg locate [options] [files]'),
    "^log|history": (log,
                    [('r', 'rev', [], 'revision'),
                     ('p', 'patch', None, 'show patch')],
                    'hg log [-r A] [-r B] [-p] [file]'),
    "manifest": (manifest, [], 'hg manifest [rev]'),
    "parents": (parents, [], 'hg parents [node]'),
    "^pull": (pull,
                  [('u', 'update', None, 'update working directory')],
                  'hg pull [options] [source]'),
    "^push": (push, [], 'hg push <destination>'),
    "rawcommit": (rawcommit,
                  [('p', 'parent', [], 'parent'),
                   ('d', 'date', "", 'date code'),
                   ('u', 'user', "", 'user'),
                   ('F', 'files', "", 'file list'),
                   ('t', 'text', "", 'commit text'),
                   ('l', 'logfile', "", 'commit text file')],
                  'hg rawcommit [options] [files]'),
    "recover": (recover, [], "hg recover"),
    "^remove|rm": (remove, [], "hg remove [files]"),
    "^revert": (revert,
               [("n", "nonrecursive", None, "don't recurse into subdirs"),
                ("r", "rev", "", "revision")],
               "hg revert [files|dirs]"),
    "root": (root, [], "hg root"),
    "^serve": (serve, [('A', 'accesslog', '', 'access log file'),
                       ('E', 'errorlog', '', 'error log file'),
                       ('p', 'port', 8000, 'listen port'),
                       ('a', 'address', '', 'interface address'),
                       ('n', 'name', os.getcwd(), 'repository name'),
                       ('', 'stdio', None, 'for remote clients'),
                       ('t', 'templates', "", 'template map')],
              "hg serve [options]"),
    "^status": (status, [], 'hg status'),
    "tag": (tag,  [('l', 'local', None, 'make the tag local'),
                   ('t', 'text', "", 'commit text'),
                   ('d', 'date', "", 'date code'),
                   ('u', 'user', "", 'user')],
            'hg tag [options] <name> [rev]'),
    "tags": (tags, [], 'hg tags'),
    "tip": (tip, [], 'hg tip'),
    "undo": (undo, [], 'hg undo'),
    "^update|up|checkout|co":
            (update,
             [('m', 'merge', None, 'allow merging of conflicts'),
              ('C', 'clean', None, 'overwrite locally modified files')],
             'hg update [options] [node]'),
    "verify": (verify, [], 'hg verify'),
    "version": (show_version, [], 'hg version'),
    }

globalopts = [('v', 'verbose', None, 'verbose'),
              ('', 'debug', None, 'debug'),
              ('q', 'quiet', None, 'quiet'),
              ('', 'profile', None, 'profile'),
              ('R', 'repository', "", 'repository root directory'),
              ('', 'traceback', None, 'print traceback on exception'),
              ('y', 'noninteractive', None, 'run non-interactively'),
              ('', 'version', None, 'output version information and exit'),
              ]

norepo = "clone init version help debugindex debugindexdot"

def find(cmd):
    for e in table.keys():
        if re.match("(%s)$" % e, cmd):
            return table[e]

    raise UnknownCommand(cmd)

class SignalInterrupt(Exception): pass

def catchterm(*args):
    raise SignalInterrupt

def run():
    sys.exit(dispatch(sys.argv[1:]))

class ParseError(Exception): pass

def parse(args):
    options = {}
    cmdoptions = {}

    try:
        args = fancyopts.fancyopts(args, globalopts, options)
    except fancyopts.getopt.GetoptError, inst:
        raise ParseError(None, inst)

    if options["version"]:
        return ("version", show_version, [], options, cmdoptions)
    elif not args:
        return ("help", help, [], options, cmdoptions)
    else:
        cmd, args = args[0], args[1:]

    i = find(cmd)

    # combine global options into local
    c = list(i[1])
    l = len(c)
    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, i[0], args, options, cmdoptions)

def dispatch(args):
    signal.signal(signal.SIGTERM, catchterm)
    try: signal.signal(signal.SIGHUP, catchterm)
    except: pass

    try:
        cmd, func, args, options, cmdoptions = parse(args)
    except ParseError, inst:
        u = ui.ui()
        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)
        sys.exit(-1)
    except UnknownCommand, inst:
        u = ui.ui()
        u.warn("hg: unknown command '%s'\n" % inst.args[0])
        help(u)
        sys.exit(1)

    u = ui.ui(options["verbose"], options["debug"], options["quiet"],
                     not options["noninteractive"])

    try:
        try:
            if cmd not in norepo.split():
                path = options["repository"] or ""
                repo = hg.repository(ui=u, path=path)
                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:
            if options['traceback']:
                traceback.print_exc()
            raise
    except util.CommandError, inst:
        u.warn("abort: %s\n" % inst.args)
    except hg.RepoError, inst:
        u.warn("abort: ", inst, "!\n")
    except SignalInterrupt:
        u.warn("killed!\n")
    except KeyboardInterrupt:
        u.warn("interrupted!\n")
    except IOError, inst:
        if hasattr(inst, "code"):
            u.warn("abort: %s\n" % inst)
        elif hasattr(inst, "reason"):
            u.warn("abort: error %d: %s\n" % (inst.reason[0], inst.reason[1]))
        elif hasattr(inst, "args") and inst[0] == errno.EPIPE:
            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 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)

    sys.exit(-1)