zeroconf: port to Python 3

Since we're using the source transformer on Python 3, calls into
Zeroconf and return values from it are generally bytes.

But various socket functions require str on Python 3.

This commit contains enough changes to coerce test-paths.t into
passing on Python 3. I suspect there are still a handful of bugs
on Python 3. But the tests do pass.

Differential Revision: https://phab.mercurial-scm.org/D5805

hgext/zeroconf/__init__.py

@@ -34,6 +34,7 b' from mercurial import ('
     encoding,
     extensions,
     hg,
+    pycompat,
     ui as uimod,
 )
 from mercurial.hgweb import (
@@ -55,7 +56,7 b' 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))
+        s.connect((r'1.0.0.1', 0))
         ip = s.getsockname()[0]
         return ip
     except socket.error:
@@ -64,17 +65,17 b' def getip():'
     # Generic method, sometimes gives useless results
     try:
         dumbip = socket.gethostbyaddr(socket.gethostname())[2][0]
-        if ':' in dumbip:
-            dumbip = '127.0.0.1'
-        if not dumbip.startswith('127.'):
+        if r':' in dumbip:
+            dumbip = r'127.0.0.1'
+        if not dumbip.startswith(r'127.'):
             return dumbip
     except (socket.gaierror, socket.herror):
-        dumbip = '127.0.0.1'
+        dumbip = r'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))
+        s.connect((r'1.0.0.1', 1))
         ip = s.getsockname()[0]
         return ip
     except socket.error:
@@ -86,19 +87,19 b' def publish(name, desc, path, port):'
     global server, localip
     if not server:
         ip = getip()
-        if ip.startswith('127.'):
+        if ip.startswith(r'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)
+    hostname = socket.gethostname().split(r'.')[0]
+    host = hostname + r".local"
+    name = r"%s-%s" % (hostname, name)
 
     # advertise to browsers
     svc = Zeroconf.ServiceInfo('_http._tcp.local.',
-                               name + '._http._tcp.local.',
+                               pycompat.bytestr(name + r'._http._tcp.local.'),
                                server = host,
                                port = port,
                                properties = {'description': desc,
@@ -108,7 +109,7 b' def publish(name, desc, path, port):'
 
     # advertise to Mercurial clients
     svc = Zeroconf.ServiceInfo('_hg._tcp.local.',
-                               name + '._hg._tcp.local.',
+                               pycompat.bytestr(name + r'._hg._tcp.local.'),
                                server = host,
                                port = port,
                                properties = {'description': desc,
@@ -158,7 +159,7 b' class listener(object):'
 
 def getzcpaths():
     ip = getip()
-    if ip.startswith('127.'):
+    if ip.startswith(r'127.'):
         return
     server = Zeroconf.Zeroconf(ip)
     l = listener()
@@ -166,10 +167,10 b' def getzcpaths():'
     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
+        name = value.name[:value.name.index(b'.')]
+        url = r"http://%s:%s%s" % (socket.inet_ntoa(value.address), value.port,
+                                   value.properties.get(r"path", r"/"))
+        yield b"zc-" + name, pycompat.bytestr(url)
 
 def config(orig, self, section, key, *args, **kwargs):
     if section == "paths" and key.startswith("zc-"):