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# 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 or any later version.
'''discover and advertise repositories on the local network
The zeroconf extension will advertise :hg:`serve` instances over
DNS-SD so that they can be discovered using the :hg:`paths` command
without knowing the server's 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
'''
from __future__ import absolute_import
import os
import socket
import time
from . import Zeroconf
from mercurial import (
dispatch,
encoding,
extensions,
hg,
ui as uimod,
)
from mercurial.hgweb import (
server as servermod
)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = 'ships-with-hg-core'
# 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 socket.error:
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 socket.error:
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)
def zc_create_server(create_server, ui, app):
httpd = create_server(ui, app)
port = httpd.port
try:
repos = app.repos
except AttributeError:
# single repo
with app._obtainrepo() as repo:
name = app.reponame or os.path.basename(repo.root)
path = repo.ui.config("web", "prefix", "").strip('/')
desc = repo.ui.config("web", "description", name)
publish(name, desc, path, port)
else:
# webdir
prefix = app.ui.config("web", "prefix", "").strip('/') + '/'
for repo, path in repos:
u = app.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, port)
return httpd
# 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, *args, **kwargs):
repos = orig(self, section, *args, **kwargs)
if section == "paths":
repos += getzcpaths()
return repos
def configsuboptions(orig, self, section, name, *args, **kwargs):
opt, sub = orig(self, section, name, *args, **kwargs)
if section == "paths" and name.startswith("zc-"):
# We have to find the URL in the zeroconf paths. We can't cons up any
# suboptions, so we use any that we found in the original config.
for zcname, zcurl in getzcpaths():
if zcname == name:
return zcurl, sub
return opt, sub
def defaultdest(orig, source):
for name, path in getzcpaths():
if path == source:
return name.encode(encoding.encoding)
return orig(source)
def cleanupafterdispatch(orig, ui, options, cmd, cmdfunc):
try:
return orig(ui, options, cmd, cmdfunc)
finally:
# we need to call close() on the server to notify() the various
# threading Conditions and allow the background threads to exit
global server
if server:
server.close()
extensions.wrapfunction(dispatch, '_runcommand', cleanupafterdispatch)
extensions.wrapfunction(uimod.ui, 'config', config)
extensions.wrapfunction(uimod.ui, 'configitems', configitems)
extensions.wrapfunction(uimod.ui, 'configsuboptions', configsuboptions)
extensions.wrapfunction(hg, 'defaultdest', defaultdest)
extensions.wrapfunction(servermod, 'create_server', zc_create_server)
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