annotate hgext/zeroconf/__init__.py @ 11340:938fefb57db5

hgext/zeroconf/__init__.py: Separate relative and absolute imports.

2to3 complains when relative and absolute imports are mixed, this fix just
separates them on the zeroconf extension. According to 2to3, the other modules
are fine.

# zeroconf.py - zeroconf support for Mercurial
#
# Copyright 2005-2007 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''discover and advertise repositories on the local network

Zeroconf enabled repositories will be announced in a network without
the need to configure a server or a service. They can be discovered
without knowing their actual IP address.

To allow other people to discover your repository using run "hg serve"
in your repository::

  $ cd test
  $ hg serve

You can discover zeroconf enabled repositories by running "hg paths"::

  $ hg paths
  zc-test = http://example.com:8000/test
'''

import socket, time, os

import Zeroconf
from mercurial import ui, hg, encoding
from mercurial import extensions
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
    try:
        dumbip = socket.gethostbyaddr(socket.gethostname())[2][0]
        if not dumbip.startswith('127.') and ':' not in dumbip:
            return dumbip
    except (socket.gaierror, socket.herror):
        dumbip = '127.0.0.1'

    # 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:
        ip = getip()
        if ip.startswith('127.'):
            # if we have no internet connection, this can happen.
            return
        localip = socket.inet_aton(ip)
        server = Zeroconf.Zeroconf(ip)

    hostname = socket.gethostname().split('.')[0]
    host = hostname + ".local"
    name = "%s-%s" % (hostname, name)

    # 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.',
                               server = host,
                               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, baseui=None):
        super(hgwebzc, self).__init__(repo, name=name, baseui=baseui)
        name = self.reponame or os.path.basename(self.repo.root)
        path = self.repo.ui.config("web", "prefix", "").strip('/')
        desc = self.repo.ui.config("web", "description", name)
        publish(name, desc, path,
                int(self.repo.ui.config("web", "port", 8000)))

class hgwebdirzc(hgwebdir_mod.hgwebdir):
    def __init__(self, conf, baseui=None):
        super(hgwebdirzc, self).__init__(conf, baseui=baseui)
        prefix = self.ui.config("web", "prefix", "").strip('/') + '/'
        for repo, path in self.repos:
            u = self.ui.copy()
            u.readconfig(os.path.join(path, '.hg', 'hgrc'))
            name = os.path.basename(repo)
            path = (prefix + repo).strip('/')
            desc = u.config('web', 'description', name)
            publish(name, desc, path, int(u.config("web", "port", 8000)))

# 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():
    ip = getip()
    if ip.startswith('127.'):
        return
    server = Zeroconf.Zeroconf(ip)
    l = listener()
    Zeroconf.ServiceBrowser(server, "_hg._tcp.local.", l)
    time.sleep(1)
    server.close()
    for value in l.found.values():
        name = value.name[:value.name.index('.')]
        url = "http://%s:%s%s" % (socket.inet_ntoa(value.address), value.port,
                                  value.properties.get("path", "/"))
        yield "zc-" + name, url

def config(orig, self, section, key, default=None, untrusted=False):
    if section == "paths" and key.startswith("zc-"):
        for name, path in getzcpaths():
            if name == key:
                return path
    return orig(self, section, key, default, untrusted)

def configitems(orig, self, section, untrusted=False):
    repos = orig(self, section, untrusted)
    if section == "paths":
        repos += getzcpaths()
    return repos

def defaultdest(orig, source):
    for name, path in getzcpaths():
        if path == source:
            return name.encode(encoding.encoding)
    return orig(source)

extensions.wrapfunction(ui.ui, 'config', config)
extensions.wrapfunction(ui.ui, 'configitems', configitems)
extensions.wrapfunction(hg, 'defaultdest', defaultdest)
hgweb_mod.hgweb = hgwebzc
hgwebdir_mod.hgwebdir = hgwebdirzc