mercurial/hgweb.py

make mercurial look in more places for config files.

now it searches <install dir>/etc/mercurial, /etc/mercurial, and user
hgrc.

this allows site-wide configuration to be shared over automounted nfs
partition, instead of chenging on every system.  option of having local
configuration on every system remains.

old code for searching /etc/mercurial/hgrc.d never worked, this code
is tested and works.

# hgweb.py - web interface to a mercurial repository
#
# Copyright 21 May 2005 - (c) 2005 Jake Edge <[e-mail]>
# 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.

import os, cgi, sys
from demandload import demandload
demandload(globals(), "mdiff time re socket zlib errno ui hg ConfigParser")
demandload(globals(), "zipfile tempfile StringIO tarfile BaseHTTPServer util")
demandload(globals(), "mimetypes")
from node import *
from i18n import gettext as _

def templatepath():
    for f in "templates", "../templates":
        p = os.path.join(os.path.dirname(__file__), f)
        if os.path.isdir(p):
            return p

def age(x):
    def plural(t, c):
        if c == 1:
            return t
        return t + "s"
    def fmt(t, c):
        return "%d %s" % (c, plural(t, c))

    now = time.time()
    then = x[0]
    delta = max(1, int(now - then))

    scales = [["second", 1],
              ["minute", 60],
              ["hour", 3600],
              ["day", 3600 * 24],
              ["week", 3600 * 24 * 7],
              ["month", 3600 * 24 * 30],
              ["year", 3600 * 24 * 365]]

    scales.reverse()

    for t, s in scales:
        n = delta / s
        if n >= 2 or s == 1:
            return fmt(t, n)

def nl2br(text):
    return text.replace('\n', '<br/>\n')

def obfuscate(text):
    return ''.join(['&#%d;' % ord(c) for c in text])

def up(p):
    if p[0] != "/":
        p = "/" + p
    if p[-1] == "/":
        p = p[:-1]
    up = os.path.dirname(p)
    if up == "/":
        return "/"
    return up + "/"

def get_mtime(repo_path):
    hg_path = os.path.join(repo_path, ".hg")
    cl_path = os.path.join(hg_path, "00changelog.i")
    if os.path.exists(os.path.join(cl_path)):
        return os.stat(cl_path).st_mtime
    else:
        return os.stat(hg_path).st_mtime

class hgrequest:
    def __init__(self, inp=None, out=None, env=None):
        self.inp = inp or sys.stdin
        self.out = out or sys.stdout
        self.env = env or os.environ
        self.form = cgi.parse(self.inp, self.env, keep_blank_values=1)

    def write(self, *things):
        for thing in things:
            if hasattr(thing, "__iter__"):
                for part in thing:
                    self.write(part)
            else:
                try:
                    self.out.write(str(thing))
                except socket.error, inst:
                    if inst[0] != errno.ECONNRESET:
                        raise

    def header(self, headers=[('Content-type','text/html')]):
        for header in headers:
            self.out.write("%s: %s\r\n" % header)
        self.out.write("\r\n")

    def httphdr(self, type, file="", size=0):

        headers = [('Content-type', type)]
        if file:
            headers.append(('Content-disposition', 'attachment; filename=%s' % file))
        if size > 0:
            headers.append(('Content-length', str(size)))
        self.header(headers)

class templater:
    def __init__(self, mapfile, filters={}, defaults={}):
        self.cache = {}
        self.map = {}
        self.base = os.path.dirname(mapfile)
        self.filters = filters
        self.defaults = defaults

        for l in file(mapfile):
            m = re.match(r'(\S+)\s*=\s*"(.*)"$', l)
            if m:
                self.cache[m.group(1)] = m.group(2)
            else:
                m = re.match(r'(\S+)\s*=\s*(\S+)', l)
                if m:
                    self.map[m.group(1)] = os.path.join(self.base, m.group(2))
                else:
                    raise LookupError(_("unknown map entry '%s'") % l)

    def __call__(self, t, **map):
        m = self.defaults.copy()
        m.update(map)
        try:
            tmpl = self.cache[t]
        except KeyError:
            tmpl = self.cache[t] = file(self.map[t]).read()
        return self.template(tmpl, self.filters, **m)

    def template(self, tmpl, filters={}, **map):
        while tmpl:
            m = re.search(r"#([a-zA-Z0-9]+)((%[a-zA-Z0-9]+)*)((\|[a-zA-Z0-9]+)*)#", tmpl)
            if m:
                yield tmpl[:m.start(0)]
                v = map.get(m.group(1), "")
                v = callable(v) and v(**map) or v

                format = m.group(2)
                fl = m.group(4)

                if format:
                    q = v.__iter__
                    for i in q():
                        lm = map.copy()
                        lm.update(i)
                        yield self(format[1:], **lm)

                    v = ""

                elif fl:
                    for f in fl.split("|")[1:]:
                        v = filters[f](v)

                yield v
                tmpl = tmpl[m.end(0):]
            else:
                yield tmpl
                return

common_filters = {
    "escape": cgi.escape,
    "strip": lambda x: x.strip(),
    "rstrip": lambda x: x.rstrip(),
    "age": age,
    "date": lambda x: util.datestr(x),
    "addbreaks": nl2br,
    "obfuscate": obfuscate,
    "short": (lambda x: x[:12]),
    "firstline": (lambda x: x.splitlines(1)[0]),
    "permissions": (lambda x: x and "-rwxr-xr-x" or "-rw-r--r--"),
    "rfc822date": lambda x: util.datestr(x, "%a, %d %b %Y %H:%M:%S"),
    }

class hgweb:
    def __init__(self, repo, name=None):
        if type(repo) == type(""):
            self.repo = hg.repository(ui.ui(), repo)
        else:
            self.repo = repo

        self.mtime = -1
        self.reponame = name
        self.archives = 'zip', 'gz', 'bz2'

    def refresh(self):
        mtime = get_mtime(self.repo.root)
        if mtime != self.mtime:
            self.mtime = mtime
            self.repo = hg.repository(self.repo.ui, self.repo.root)
            self.maxchanges = int(self.repo.ui.config("web", "maxchanges", 10))
            self.maxfiles = int(self.repo.ui.config("web", "maxfiles", 10))
            self.allowpull = self.repo.ui.configbool("web", "allowpull", True)

    def archivelist(self, nodeid):
        for i in self.archives:
            if self.repo.ui.configbool("web", "allow" + i, False):
                yield {"type" : i, "node" : nodeid}

    def listfiles(self, files, mf):
        for f in files[:self.maxfiles]:
            yield self.t("filenodelink", node=hex(mf[f]), file=f)
        if len(files) > self.maxfiles:
            yield self.t("fileellipses")

    def listfilediffs(self, files, changeset):
        for f in files[:self.maxfiles]:
            yield self.t("filedifflink", node=hex(changeset), file=f)
        if len(files) > self.maxfiles:
            yield self.t("fileellipses")

    def parents(self, node, parents=[], rev=None, hide=False, **args):
        if not rev:
            rev = lambda x: ""
        parents = [p for p in parents if p != nullid]
        if hide and len(parents) == 1 and rev(parents[0]) == rev(node) - 1:
            return
        for p in parents:
            yield dict(node=hex(p), rev=rev(p), **args)

    def showtag(self, t1, node=nullid, **args):
        for t in self.repo.nodetags(node):
             yield self.t(t1, tag=t, **args)

    def diff(self, node1, node2, files):
        def filterfiles(list, files):
            l = [x for x in list if x in files]

            for f in files:
                if f[-1] != os.sep:
                    f += os.sep
                l += [x for x in list if x.startswith(f)]
            return l

        parity = [0]
        def diffblock(diff, f, fn):
            yield self.t("diffblock",
                         lines=prettyprintlines(diff),
                         parity=parity[0],
                         file=f,
                         filenode=hex(fn or nullid))
            parity[0] = 1 - parity[0]

        def prettyprintlines(diff):
            for l in diff.splitlines(1):
                if l.startswith('+'):
                    yield self.t("difflineplus", line=l)
                elif l.startswith('-'):
                    yield self.t("difflineminus", line=l)
                elif l.startswith('@'):
                    yield self.t("difflineat", line=l)
                else:
                    yield self.t("diffline", line=l)

        r = self.repo
        cl = r.changelog
        mf = r.manifest
        change1 = cl.read(node1)
        change2 = cl.read(node2)
        mmap1 = mf.read(change1[0])
        mmap2 = mf.read(change2[0])
        date1 = util.datestr(change1[2])
        date2 = util.datestr(change2[2])

        c, a, d, u = r.changes(node1, node2)
        if files:
            c, a, d = map(lambda x: filterfiles(x, files), (c, a, d))

        for f in c:
            to = r.file(f).read(mmap1[f])
            tn = r.file(f).read(mmap2[f])
            yield diffblock(mdiff.unidiff(to, date1, tn, date2, f), f, tn)
        for f in a:
            to = None
            tn = r.file(f).read(mmap2[f])
            yield diffblock(mdiff.unidiff(to, date1, tn, date2, f), f, tn)
        for f in d:
            to = r.file(f).read(mmap1[f])
            tn = None
            yield diffblock(mdiff.unidiff(to, date1, tn, date2, f), f, tn)

    def changelog(self, pos):
        def changenav(**map):
            def seq(factor=1):
                yield 1 * factor
                yield 3 * factor
                #yield 5 * factor
                for f in seq(factor * 10):
                    yield f

            l = []
            for f in seq():
                if f < self.maxchanges / 2:
                    continue
                if f > count:
                    break
                r = "%d" % f
                if pos + f < count:
                    l.append(("+" + r, pos + f))
                if pos - f >= 0:
                    l.insert(0, ("-" + r, pos - f))

            yield {"rev": 0, "label": "(0)"}

            for label, rev in l:
                yield {"label": label, "rev": rev}

            yield {"label": "tip", "rev": "tip"}

        def changelist(**map):
            parity = (start - end) & 1
            cl = self.repo.changelog
            l = [] # build a list in forward order for efficiency
            for i in range(start, end):
                n = cl.node(i)
                changes = cl.read(n)
                hn = hex(n)

                l.insert(0, {"parity": parity,
                             "author": changes[1],
                             "parent": self.parents(n, cl.parents(n), cl.rev,
                                                    hide=True),
                             "changelogtag": self.showtag("changelogtag",n),
                             "manifest": hex(changes[0]),
                             "desc": changes[4],
                             "date": changes[2],
                             "files": self.listfilediffs(changes[3], n),
                             "rev": i,
                             "node": hn})
                parity = 1 - parity

            for e in l:
                yield e

        cl = self.repo.changelog
        mf = cl.read(cl.tip())[0]
        count = cl.count()
        start = max(0, pos - self.maxchanges + 1)
        end = min(count, start + self.maxchanges)
        pos = end - 1

        yield self.t('changelog',
                     changenav=changenav,
                     manifest=hex(mf),
                     rev=pos, changesets=count, entries=changelist)

    def search(self, query):

        def changelist(**map):
            cl = self.repo.changelog
            count = 0
            qw = query.lower().split()

            def revgen():
                for i in range(cl.count() - 1, 0, -100):
                    l = []
                    for j in range(max(0, i - 100), i):
                        n = cl.node(j)
                        changes = cl.read(n)
                        l.append((n, j, changes))
                    l.reverse()
                    for e in l:
                        yield e

            for n, i, changes in revgen():
                miss = 0
                for q in qw:
                    if not (q in changes[1].lower() or
                            q in changes[4].lower() or
                            q in " ".join(changes[3][:20]).lower()):
                        miss = 1
                        break
                if miss:
                    continue

                count += 1
                hn = hex(n)

                yield self.t('searchentry',
                             parity=count & 1,
                             author=changes[1],
                             parent=self.parents(n, cl.parents(n), cl.rev),
                             changelogtag=self.showtag("changelogtag",n),
                             manifest=hex(changes[0]),
                             desc=changes[4],
                             date=changes[2],
                             files=self.listfilediffs(changes[3], n),
                             rev=i,
                             node=hn)

                if count >= self.maxchanges:
                    break

        cl = self.repo.changelog
        mf = cl.read(cl.tip())[0]

        yield self.t('search',
                     query=query,
                     manifest=hex(mf),
                     entries=changelist)

    def changeset(self, nodeid):
        cl = self.repo.changelog
        n = self.repo.lookup(nodeid)
        nodeid = hex(n)
        changes = cl.read(n)
        p1 = cl.parents(n)[0]

        files = []
        mf = self.repo.manifest.read(changes[0])
        for f in changes[3]:
            files.append(self.t("filenodelink",
                                filenode=hex(mf.get(f, nullid)), file=f))

        def diff(**map):
            yield self.diff(p1, n, None)

        yield self.t('changeset',
                     diff=diff,
                     rev=cl.rev(n),
                     node=nodeid,
                     parent=self.parents(n, cl.parents(n), cl.rev),
                     changesettag=self.showtag("changesettag",n),
                     manifest=hex(changes[0]),
                     author=changes[1],
                     desc=changes[4],
                     date=changes[2],
                     files=files,
                     archives=self.archivelist(nodeid))

    def filelog(self, f, filenode):
        cl = self.repo.changelog
        fl = self.repo.file(f)
        filenode = hex(fl.lookup(filenode))
        count = fl.count()

        def entries(**map):
            l = []
            parity = (count - 1) & 1

            for i in range(count):
                n = fl.node(i)
                lr = fl.linkrev(n)
                cn = cl.node(lr)
                cs = cl.read(cl.node(lr))

                l.insert(0, {"parity": parity,
                             "filenode": hex(n),
                             "filerev": i,
                             "file": f,
                             "node": hex(cn),
                             "author": cs[1],
                             "date": cs[2],
                             "parent": self.parents(n, fl.parents(n),
                                                    fl.rev, file=f),
                             "desc": cs[4]})
                parity = 1 - parity

            for e in l:
                yield e

        yield self.t("filelog", file=f, filenode=filenode, entries=entries)

    def filerevision(self, f, node):
        fl = self.repo.file(f)
        n = fl.lookup(node)
        node = hex(n)
        text = fl.read(n)
        changerev = fl.linkrev(n)
        cl = self.repo.changelog
        cn = cl.node(changerev)
        cs = cl.read(cn)
        mfn = cs[0]

        mt = mimetypes.guess_type(f)[0]
        rawtext = text
        if util.binary(text):
            text = "(binary:%s)" % mt

        def lines():
            for l, t in enumerate(text.splitlines(1)):
                yield {"line": t,
                       "linenumber": "% 6d" % (l + 1),
                       "parity": l & 1}

        yield self.t("filerevision",
                     file=f,
                     filenode=node,
                     path=up(f),
                     text=lines(),
                     raw=rawtext,
                     mimetype=mt,
                     rev=changerev,
                     node=hex(cn),
                     manifest=hex(mfn),
                     author=cs[1],
                     date=cs[2],
                     parent=self.parents(n, fl.parents(n), fl.rev, file=f),
                     permissions=self.repo.manifest.readflags(mfn)[f])

    def fileannotate(self, f, node):
        bcache = {}
        ncache = {}
        fl = self.repo.file(f)
        n = fl.lookup(node)
        node = hex(n)
        changerev = fl.linkrev(n)

        cl = self.repo.changelog
        cn = cl.node(changerev)
        cs = cl.read(cn)
        mfn = cs[0]

        def annotate(**map):
            parity = 1
            last = None
            for r, l in fl.annotate(n):
                try:
                    cnode = ncache[r]
                except KeyError:
                    cnode = ncache[r] = self.repo.changelog.node(r)

                try:
                    name = bcache[r]
                except KeyError:
                    cl = self.repo.changelog.read(cnode)
                    bcache[r] = name = self.repo.ui.shortuser(cl[1])

                if last != cnode:
                    parity = 1 - parity
                    last = cnode

                yield {"parity": parity,
                       "node": hex(cnode),
                       "rev": r,
                       "author": name,
                       "file": f,
                       "line": l}

        yield self.t("fileannotate",
                     file=f,
                     filenode=node,
                     annotate=annotate,
                     path=up(f),
                     rev=changerev,
                     node=hex(cn),
                     manifest=hex(mfn),
                     author=cs[1],
                     date=cs[2],
                     parent=self.parents(n, fl.parents(n), fl.rev, file=f),
                     permissions=self.repo.manifest.readflags(mfn)[f])

    def manifest(self, mnode, path):
        man = self.repo.manifest
        mn = man.lookup(mnode)
        mnode = hex(mn)
        mf = man.read(mn)
        rev = man.rev(mn)
        node = self.repo.changelog.node(rev)
        mff = man.readflags(mn)

        files = {}

        p = path[1:]
        l = len(p)

        for f,n in mf.items():
            if f[:l] != p:
                continue
            remain = f[l:]
            if "/" in remain:
                short = remain[:remain.find("/") + 1] # bleah
                files[short] = (f, None)
            else:
                short = os.path.basename(remain)
                files[short] = (f, n)

        def filelist(**map):
            parity = 0
            fl = files.keys()
            fl.sort()
            for f in fl:
                full, fnode = files[f]
                if not fnode:
                    continue

                yield {"file": full,
                       "manifest": mnode,
                       "filenode": hex(fnode),
                       "parity": parity,
                       "basename": f,
                       "permissions": mff[full]}
                parity = 1 - parity

        def dirlist(**map):
            parity = 0
            fl = files.keys()
            fl.sort()
            for f in fl:
                full, fnode = files[f]
                if fnode:
                    continue

                yield {"parity": parity,
                       "path": os.path.join(path, f),
                       "manifest": mnode,
                       "basename": f[:-1]}
                parity = 1 - parity

        yield self.t("manifest",
                     manifest=mnode,
                     rev=rev,
                     node=hex(node),
                     path=path,
                     up=up(path),
                     fentries=filelist,
                     dentries=dirlist,
                     archives=self.archivelist(hex(node)))

    def tags(self):
        cl = self.repo.changelog
        mf = cl.read(cl.tip())[0]

        i = self.repo.tagslist()
        i.reverse()

        def entries(**map):
            parity = 0
            for k,n in i:
                yield {"parity": parity,
                       "tag": k,
                       "node": hex(n)}
                parity = 1 - parity

        yield self.t("tags",
                     manifest=hex(mf),
                     entries=entries)

    def filediff(self, file, changeset):
        cl = self.repo.changelog
        n = self.repo.lookup(changeset)
        changeset = hex(n)
        p1 = cl.parents(n)[0]
        cs = cl.read(n)
        mf = self.repo.manifest.read(cs[0])

        def diff(**map):
            yield self.diff(p1, n, file)

        yield self.t("filediff",
                     file=file,
                     filenode=hex(mf.get(file, nullid)),
                     node=changeset,
                     rev=self.repo.changelog.rev(n),
                     parent=self.parents(n, cl.parents(n), cl.rev),
                     diff=diff)

    def archive(self, req, cnode, type):
        cs = self.repo.changelog.read(cnode)
        mnode = cs[0]
        mf = self.repo.manifest.read(mnode)
        rev = self.repo.manifest.rev(mnode)
        reponame = re.sub(r"\W+", "-", self.reponame)
        name = "%s-%s/" % (reponame, short(cnode))

        files = mf.keys()
        files.sort()

        if type == 'zip':
            tmp = tempfile.mkstemp()[1]
            try:
                zf = zipfile.ZipFile(tmp, "w", zipfile.ZIP_DEFLATED)

                for f in files:
                    zf.writestr(name + f, self.repo.file(f).read(mf[f]))
                zf.close()

                f = open(tmp, 'r')
                req.httphdr('application/zip', name[:-1] + '.zip',
                        os.path.getsize(tmp))
                req.write(f.read())
                f.close()
            finally:
                os.unlink(tmp)

        else:
            tf = tarfile.TarFile.open(mode='w|' + type, fileobj=req.out)
            mff = self.repo.manifest.readflags(mnode)
            mtime = int(time.time())

            if type == "gz":
                encoding = "gzip"
            else:
                encoding = "x-bzip2"
            req.header([('Content-type', 'application/x-tar'),
                    ('Content-disposition', 'attachment; filename=%s%s%s' %
                        (name[:-1], '.tar.', type)),
                    ('Content-encoding', encoding)])
            for fname in files:
                rcont = self.repo.file(fname).read(mf[fname])
                finfo = tarfile.TarInfo(name + fname)
                finfo.mtime = mtime
                finfo.size = len(rcont)
                finfo.mode = mff[fname] and 0755 or 0644
                tf.addfile(finfo, StringIO.StringIO(rcont))
            tf.close()

    # add tags to things
    # tags -> list of changesets corresponding to tags
    # find tag, changeset, file

    def run(self, req=hgrequest()):
        def header(**map):
            yield self.t("header", **map)

        def footer(**map):
            yield self.t("footer", **map)

        def expand_form(form):
            shortcuts = {
                'cl': [('cmd', ['changelog']), ('rev', None)],
                'cs': [('cmd', ['changeset']), ('node', None)],
                'f': [('cmd', ['file']), ('filenode', None)],
                'fl': [('cmd', ['filelog']), ('filenode', None)],
                'fd': [('cmd', ['filediff']), ('node', None)],
                'fa': [('cmd', ['annotate']), ('filenode', None)],
                'mf': [('cmd', ['manifest']), ('manifest', None)],
                'ca': [('cmd', ['archive']), ('node', None)],
                'tags': [('cmd', ['tags'])],
                'tip': [('cmd', ['changeset']), ('node', ['tip'])],
            }

            for k in shortcuts.iterkeys():
                if form.has_key(k):
                    for name, value in shortcuts[k]:
                        if value is None:
                            value = form[k]
                        form[name] = value
                    del form[k]

        self.refresh()

        expand_form(req.form)

        t = self.repo.ui.config("web", "templates", templatepath())
        m = os.path.join(t, "map")
        style = self.repo.ui.config("web", "style", "")
        if req.form.has_key('style'):
            style = req.form['style'][0]
        if style:
            b = os.path.basename("map-" + style)
            p = os.path.join(t, b)
            if os.path.isfile(p):
                m = p

        port = req.env["SERVER_PORT"]
        port = port != "80" and (":" + port) or ""
        uri = req.env["REQUEST_URI"]
        if "?" in uri:
            uri = uri.split("?")[0]
        url = "http://%s%s%s" % (req.env["SERVER_NAME"], port, uri)
        if not self.reponame:
            self.reponame = (self.repo.ui.config("web", "name")
                             or uri.strip('/') or self.repo.root)

        self.t = templater(m, common_filters,
                           {"url": url,
                            "repo": self.reponame,
                            "header": header,
                            "footer": footer,
                           })

        if not req.form.has_key('cmd'):
            req.form['cmd'] = [self.t.cache['default'],]

        if req.form['cmd'][0] == 'changelog':
            c = self.repo.changelog.count() - 1
            hi = c
            if req.form.has_key('rev'):
                hi = req.form['rev'][0]
                try:
                    hi = self.repo.changelog.rev(self.repo.lookup(hi))
                except hg.RepoError:
                    req.write(self.search(hi))
                    return

            req.write(self.changelog(hi))

        elif req.form['cmd'][0] == 'changeset':
            req.write(self.changeset(req.form['node'][0]))

        elif req.form['cmd'][0] == 'manifest':
            req.write(self.manifest(req.form['manifest'][0], req.form['path'][0]))

        elif req.form['cmd'][0] == 'tags':
            req.write(self.tags())

        elif req.form['cmd'][0] == 'filediff':
            req.write(self.filediff(req.form['file'][0], req.form['node'][0]))

        elif req.form['cmd'][0] == 'file':
            req.write(self.filerevision(req.form['file'][0], req.form['filenode'][0]))

        elif req.form['cmd'][0] == 'annotate':
            req.write(self.fileannotate(req.form['file'][0], req.form['filenode'][0]))

        elif req.form['cmd'][0] == 'filelog':
            req.write(self.filelog(req.form['file'][0], req.form['filenode'][0]))

        elif req.form['cmd'][0] == 'heads':
            req.httphdr("application/mercurial-0.1")
            h = self.repo.heads()
            req.write(" ".join(map(hex, h)) + "\n")

        elif req.form['cmd'][0] == 'branches':
            req.httphdr("application/mercurial-0.1")
            nodes = []
            if req.form.has_key('nodes'):
                nodes = map(bin, req.form['nodes'][0].split(" "))
            for b in self.repo.branches(nodes):
                req.write(" ".join(map(hex, b)) + "\n")

        elif req.form['cmd'][0] == 'between':
            req.httphdr("application/mercurial-0.1")
            nodes = []
            if req.form.has_key('pairs'):
                pairs = [map(bin, p.split("-"))
                         for p in req.form['pairs'][0].split(" ")]
            for b in self.repo.between(pairs):
                req.write(" ".join(map(hex, b)) + "\n")

        elif req.form['cmd'][0] == 'changegroup':
            req.httphdr("application/mercurial-0.1")
            nodes = []
            if not self.allowpull:
                return

            if req.form.has_key('roots'):
                nodes = map(bin, req.form['roots'][0].split(" "))

            z = zlib.compressobj()
            f = self.repo.changegroup(nodes)
            while 1:
                chunk = f.read(4096)
                if not chunk:
                    break
                req.write(z.compress(chunk))

            req.write(z.flush())

        elif req.form['cmd'][0] == 'archive':
            changeset = self.repo.lookup(req.form['node'][0])
            type = req.form['type'][0]
            if (type in self.archives and
                self.repo.ui.configbool("web", "allow" + type, False)):
                self.archive(req, changeset, type)
                return

            req.write(self.t("error"))

        else:
            req.write(self.t("error"))

def create_server(repo):

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

    address = repo.ui.config("web", "address", "")
    port = int(repo.ui.config("web", "port", 8000))
    use_ipv6 = repo.ui.configbool("web", "ipv6")
    accesslog = openlog(repo.ui.config("web", "accesslog", "-"), sys.stdout)
    errorlog = openlog(repo.ui.config("web", "errorlog", "-"), sys.stderr)

    class IPv6HTTPServer(BaseHTTPServer.HTTPServer):
        address_family = getattr(socket, 'AF_INET6', None)

        def __init__(self, *args, **kwargs):
            if self.address_family is None:
                raise hg.RepoError(_('IPv6 not available on this system'))
            BaseHTTPServer.HTTPServer.__init__(self, *args, **kwargs)

    class hgwebhandler(BaseHTTPServer.BaseHTTPRequestHandler):
        def log_error(self, format, *args):
            errorlog.write("%s - - [%s] %s\n" % (self.address_string(),
                                                 self.log_date_time_string(),
                                                 format % args))

        def log_message(self, format, *args):
            accesslog.write("%s - - [%s] %s\n" % (self.address_string(),
                                                  self.log_date_time_string(),
                                                  format % args))

        def do_POST(self):
            try:
                self.do_hgweb()
            except socket.error, inst:
                if inst[0] != errno.EPIPE:
                    raise

        def do_GET(self):
            self.do_POST()

        def do_hgweb(self):
            query = ""
            p = self.path.find("?")
            if p:
                query = self.path[p + 1:]
                query = query.replace('+', ' ')

            env = {}
            env['GATEWAY_INTERFACE'] = 'CGI/1.1'
            env['REQUEST_METHOD'] = self.command
            env['SERVER_NAME'] = self.server.server_name
            env['SERVER_PORT'] = str(self.server.server_port)
            env['REQUEST_URI'] = "/"
            if query:
                env['QUERY_STRING'] = query
            host = self.address_string()
            if host != self.client_address[0]:
                env['REMOTE_HOST'] = host
                env['REMOTE_ADDR'] = self.client_address[0]

            if self.headers.typeheader is None:
                env['CONTENT_TYPE'] = self.headers.type
            else:
                env['CONTENT_TYPE'] = self.headers.typeheader
            length = self.headers.getheader('content-length')
            if length:
                env['CONTENT_LENGTH'] = length
            accept = []
            for line in self.headers.getallmatchingheaders('accept'):
                if line[:1] in "\t\n\r ":
                    accept.append(line.strip())
                else:
                    accept = accept + line[7:].split(',')
            env['HTTP_ACCEPT'] = ','.join(accept)

            req = hgrequest(self.rfile, self.wfile, env)
            self.send_response(200, "Script output follows")
            hg.run(req)

    hg = hgweb(repo)
    if use_ipv6:
        return IPv6HTTPServer((address, port), hgwebhandler)
    else:
        return BaseHTTPServer.HTTPServer((address, port), hgwebhandler)

def server(path, name, templates, address, port, use_ipv6=False,
           accesslog=sys.stdout, errorlog=sys.stderr):
    httpd = create_server(path, name, templates, address, port, use_ipv6,
                          accesslog, errorlog)
    httpd.serve_forever()

# This is a stopgap
class hgwebdir:
    def __init__(self, config):
        def cleannames(items):
            return [(name.strip('/'), path) for name, path in items]

        if type(config) == type([]):
            self.repos = cleannames(config)
        elif type(config) == type({}):
            self.repos = cleannames(config.items())
            self.repos.sort()
        else:
            cp = ConfigParser.SafeConfigParser()
            cp.read(config)
            self.repos = cleannames(cp.items("paths"))
            self.repos.sort()

    def run(self, req=hgrequest()):
        def header(**map):
            yield tmpl("header", **map)

        def footer(**map):
            yield tmpl("footer", **map)

        m = os.path.join(templatepath(), "map")
        tmpl = templater(m, common_filters,
                         {"header": header, "footer": footer})

        def entries(**map):
            parity = 0
            for name, path in self.repos:
                u = ui.ui()
                try:
                    u.readconfig(os.path.join(path, '.hg', 'hgrc'))
                except IOError:
                    pass
                get = u.config

                url = ('/'.join([req.env["REQUEST_URI"].split('?')[0], name])
                       .replace("//", "/"))

                # update time with local timezone
                d = (get_mtime(path), util.makedate()[1])

                yield dict(contact=(get("ui", "username") or # preferred
                                    get("web", "contact") or # deprecated
                                    get("web", "author", "unknown")), # also
                           name=get("web", "name", name),
                           url=url,
                           parity=parity,
                           shortdesc=get("web", "description", "unknown"),
                           lastupdate=d)

                parity = 1 - parity

        virtual = req.env.get("PATH_INFO", "").strip('/')
        if virtual:
            real = dict(self.repos).get(virtual)
            if real:
                hgweb(real).run(req)
            else:
                req.write(tmpl("notfound", repo=virtual))
        else:
            req.write(tmpl("index", entries=entries))