# zeroconf.py - zeroconf support for Mercurial

#

# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>

#

# This software may be used and distributed according to the terms of

# the GNU General Public License (version 2), incorporated herein by

# reference.

import Zeroconf, socket, time, os

from mercurial import ui

from mercurial.hgweb import hgweb_mod

from mercurial.hgweb import hgwebdir_mod

# publish

server = None

localip = None

def getip():

    # finds external-facing interface without sending any packets (Linux)

    try:

        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

        s.connect(('1.0.0.1', 0))

        ip = s.getsockname()[0]

        return ip

    except:

        pass

    # Generic method, sometimes gives useless results

    dumbip = socket.gethostbyaddr(socket.gethostname())[2][0]

    if not dumbip.startswith('127.'):

        return dumbip

    # works elsewhere, but actually sends a packet

    try:

        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

        s.connect(('1.0.0.1', 1))

        ip = s.getsockname()[0]

        return ip

    except:

        pass

    return dumbip

def publish(name, desc, path, port):

    global server, localip

    if not server:

        server = Zeroconf.Zeroconf()

        ip = getip()

        localip = socket.inet_aton(ip)

    host = socket.gethostname() + ".local"

    # advertise to browsers

    svc = Zeroconf.ServiceInfo('_http._tcp.local.',

                               name + '._http._tcp.local.',

                               server = host,

                               port = port,

                               properties = {'description': desc,

                                             'path': "/" + path},

                               address = localip, weight = 0, priority = 0)

    server.registerService(svc)

    # advertise to Mercurial clients

    svc = Zeroconf.ServiceInfo('_hg._tcp.local.',

                               name + '._hg._tcp.local.',

                               port = port,

                               properties = {'description': desc,

                                             'path': "/" + path},

                               address = localip, weight = 0, priority = 0)

    server.registerService(svc)

class hgwebzc(hgweb_mod.hgweb):

    def __init__(self, repo, name=None):

        super(hgwebzc, self).__init__(repo, name)

        name = self.reponame or os.path.basename(repo.root)

        desc = self.repo.ui.config("web", "description", name)

        publish(name, desc, name, int(repo.ui.config("web", "port", 8000)))

class hgwebdirzc(hgwebdir_mod.hgwebdir):

    def run(self):

        print os.environ

        for r, p in self.repos:

            u = ui.ui(parentui=self.parentui)

            u.readconfig(os.path.join(path, '.hg', 'hgrc'))

            n = os.path.basename(r)

            desc = u.config("web", "description", n)

            publish(n, "hgweb", p, int(repo.ui.config("web", "port", 8000)))

        return super(hgwebdirzc, self).run()

# listen

class listener(object):

    def __init__(self):

        self.found = {}

    def removeService(self, server, type, name):

        if repr(name) in self.found:

            del self.found[repr(name)]

    def addService(self, server, type, name):

        self.found[repr(name)] = server.getServiceInfo(type, name)

def getzcpaths():

    server = Zeroconf.Zeroconf()

    l = listener()

    browser = Zeroconf.ServiceBrowser(server, "_hg._tcp.local.", l)

    time.sleep(1)

    server.close()

    for v in l.found.values():

        n = v.name[:v.name.index('.')]

        n.replace(" ", "-")

        u = "http://%s:%s%s" % (socket.inet_ntoa(v.address), v.port,

                                 v.properties.get("path", "/"))

        yield "zc-" + n, u

def config(self, section, key, default=None, untrusted=False):

    if section == "paths" and key.startswith("zc-"):

        for n, p in getzcpaths():

            if n == key:

                return p

    return oldconfig(self, section, key, default, untrusted)

def configitems(self, section):

    r = oldconfigitems(self, section, untrusted=False)

    if section == "paths":

        r += getzcpaths()

    return r

oldconfig = ui.ui.config

oldconfigitems = ui.ui.configitems

ui.ui.config = config

ui.ui.configitems = configitems

hgweb_mod.hgweb = hgwebzc

hgwebdir_mod.hgwebdir = hgwebdirzc