Add support for url#id syntax

This allows you to do:

 hg clone http://server/repo#stable

which is equivalent to:

 hg clone -r stable http://server/repo

Future incoming, outgoing, and push commands will default to using
this id because it's recorded in the default path.

Other commands that accept URLs (push, pull, bundle, incoming, and
outgoing) also accept this syntax.

mercurial/cmdutil.py

@@ -11,6 +11,15 b' import os, sys, mdiff, bdiff, util, temp'
 
 revrangesep = ':'
 
+def parseurl(url, revs):
+    '''parse url#branch, returning url, branch + revs'''
+
+    if '#' not in url:
+        return url, (revs or None)
+
+    url, rev = url.split('#', 1)
+    return url, revs + [rev]
+
 def revpair(repo, revs):
     '''return pair of nodes, given list of revisions. second item can
     be None, meaning use working dir.'''

mercurial/commands.py

@@ -336,7 +336,8 b' def bundle(ui, repo, fname, dest=None, *'
                         visit.append(p)
     else:
         setremoteconfig(ui, opts)
-        dest = ui.expandpath(dest or 'default-push', dest or 'default')
+        dest, revs = cmdutil.parseurl(
+            ui.expandpath(dest or 'default-push', dest or 'default'), revs)
         other = hg.repository(ui, dest)
         o = repo.findoutgoing(other, force=opts['force'])
 
@@ -407,7 +408,7 b' def clone(ui, source, dest=None, **opts)'
     about ssh:// URLs.
     """
     setremoteconfig(ui, opts)
-    hg.clone(ui, ui.expandpath(source), dest,
+    hg.clone(ui, source, dest,
              pull=opts['pull'],
              stream=opts['uncompressed'],
              rev=opts['rev'],
@@ -1588,15 +1589,14 b' def incoming(ui, repo, source="default",'
 
     See pull for valid source format details.
     """
-    source = ui.expandpath(source)
+    source, revs = cmdutil.parseurl(ui.expandpath(source), opts['rev'])
     setremoteconfig(ui, opts)
 
     other = hg.repository(ui, source)
     ui.status(_('comparing with %s\n') % source)
-    revs = None
-    if opts['rev']:
+    if revs:
         if 'lookup' in other.capabilities:
-            revs = [other.lookup(rev) for rev in opts['rev']]
+            revs = [other.lookup(rev) for rev in revs]
         else:
             error = _("Other repository doesn't support revision lookup, so a rev cannot be specified.")
             raise util.Abort(error)
@@ -1891,11 +1891,11 b' def outgoing(ui, repo, dest=None, **opts'
 
     See pull for valid destination format details.
     """
-    dest = ui.expandpath(dest or 'default-push', dest or 'default')
+    dest, revs = cmdutil.parseurl(
+        ui.expandpath(dest or 'default-push', dest or 'default'), opts['rev'])
     setremoteconfig(ui, opts)
-    revs = None
-    if opts['rev']:
-        revs = [repo.lookup(rev) for rev in opts['rev']]
+    if revs:
+        revs = [repo.lookup(rev) for rev in revs]
 
     other = hg.repository(ui, dest)
     ui.status(_('comparing with %s\n') % dest)
@@ -1989,6 +1989,9 b' def pull(ui, repo, source="default", **o'
     allows access to a Mercurial repository where you simply use a web
     server to publish the .hg directory as static content.
 
+    An optional identifier after # indicates a particular branch, tag,
+    or changeset to pull.
+
     Some notes about using SSH with Mercurial:
     - SSH requires an accessible shell account on the destination machine
       and a copy of hg in the remote path or specified with as remotecmd.
@@ -2004,18 +2007,18 b' def pull(ui, repo, source="default", **o'
       Alternatively specify "ssh -C" as your ssh command in your hgrc or
       with the --ssh command line option.
     """
-    source = ui.expandpath(source)
+    source, revs = cmdutil.parseurl(ui.expandpath(source), opts['rev'])
     setremoteconfig(ui, opts)
 
     other = hg.repository(ui, source)
     ui.status(_('pulling from %s\n') % (source))
-    revs = None
-    if opts['rev']:
+    if revs:
         if 'lookup' in other.capabilities:
-            revs = [other.lookup(rev) for rev in opts['rev']]
+            revs = [other.lookup(rev) for rev in revs]
         else:
             error = _("Other repository doesn't support revision lookup, so a rev cannot be specified.")
             raise util.Abort(error)
+
     modheads = repo.pull(other, heads=revs, force=opts['force'])
     return postincoming(ui, repo, modheads, opts['update'])
 
@@ -2040,20 +2043,23 b' def push(ui, repo, dest=None, **opts):'
       http://[user@]host[:port]/[path]
       https://[user@]host[:port]/[path]
 
+    An optional identifier after # indicates a particular branch, tag,
+    or changeset to push.
+
     Look at the help text for the pull command for important details
     about ssh:// URLs.
 
     Pushing to http:// and https:// URLs is only possible, if this
     feature is explicitly enabled on the remote Mercurial server.
     """
-    dest = ui.expandpath(dest or 'default-push', dest or 'default')
+    dest, revs = cmdutil.parseurl(
+        ui.expandpath(dest or 'default-push', dest or 'default'), opts['rev'])
     setremoteconfig(ui, opts)
 
     other = hg.repository(ui, dest)
     ui.status('pushing to %s\n' % (dest))
-    revs = None
-    if opts['rev']:
-        revs = [repo.lookup(rev) for rev in opts['rev']]
+    if revs:
+        revs = [repo.lookup(rev) for rev in revs]
     r = repo.push(other, opts['force'], revs=revs)
     return r == 0
 

mercurial/hg.py

@@ -10,7 +10,7 b' from node import *'
 from repo import *
 from i18n import _
 import localrepo, bundlerepo, httprepo, sshrepo, statichttprepo
-import errno, lock, os, shutil, util
+import errno, lock, os, shutil, util, cmdutil
 import merge as _merge
 import verify as _verify
 
@@ -97,6 +97,10 b' def clone(ui, source, dest=None, pull=Fa'
     update: update working directory after clone completes, if
     destination is local repository
     """
+
+    origsource = source
+    source, rev = cmdutil.parseurl(ui.expandpath(source), rev)
+
     if isinstance(source, str):
         src_repo = repository(ui, source)
     else:
@@ -134,10 +138,10 b' def clone(ui, source, dest=None, pull=Fa'
     if islocal(dest):
         dir_cleanup = DirCleanup(dest)
 
-    abspath = source
+    abspath = origsource
     copy = False
     if src_repo.local() and islocal(dest):
-        abspath = os.path.abspath(source)
+        abspath = os.path.abspath(origsource)
         copy = not pull and not rev
 
     src_lock, dest_lock = None, None