add hg and python

sys/lib/python/hgext/zeroconf/__init__.py

@@ -0,0 +1,159 @@
+# 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.
+
+'''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 Zeroconf, socket, time, os
+from mercurial import ui
+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:
+        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):
+        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):
+        for r, p in self.repos:
+            u = self.ui.copy()
+            u.readconfig(os.path.join(p, '.hg', 'hgrc'))
+            n = os.path.basename(r)
+            publish(n, "hgweb", p, int(u.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():
+    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 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(orig, 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 orig(self, section, key, default, untrusted)
+
+def configitems(orig, self, section, untrusted=False):
+    r = orig(self, section, untrusted)
+    if section == "paths":
+        r += getzcpaths()
+    return r
+
+extensions.wrapfunction(ui.ui, 'config', config)
+extensions.wrapfunction(ui.ui, 'configitems', configitems)
+hgweb_mod.hgweb = hgwebzc
+hgwebdir_mod.hgwebdir = hgwebdirzc