diff -r accb1cf85c31 -r e3495c399006 mercurial/hgweb/protocol.py
--- a/mercurial/hgweb/protocol.py	Sun May 24 02:56:03 2009 -0500
+++ b/mercurial/hgweb/protocol.py	Sat May 23 17:02:49 2009 +0200
@@ -5,7 +5,7 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2, incorporated herein by reference.
 
-import cStringIO, zlib, tempfile, errno, os, sys
+import cStringIO, zlib, tempfile, errno, os, sys, urllib
 from mercurial import util, streamclone
 from mercurial.node import bin, hex
 from mercurial import changegroup as changegroupmod
@@ -17,6 +17,7 @@
 __all__ = [
    'lookup', 'heads', 'branches', 'between', 'changegroup',
    'changegroupsubset', 'capabilities', 'unbundle', 'stream_out',
+   'branchmap',
 ]
 
 HGTYPE = 'application/mercurial-0.1'
@@ -37,6 +38,17 @@
     req.respond(HTTP_OK, HGTYPE, length=len(resp))
     yield resp
 
+def branchmap(repo, req):
+    branches = repo.branchmap()
+    heads = []
+    for branch, nodes in branches.iteritems():
+        branchname = urllib.quote(branch)
+        branchnodes = [hex(node) for node in nodes]
+        heads.append('%s %s' % (branchname, ' '.join(branchnodes)))
+    resp = '\n'.join(heads)
+    req.respond(HTTP_OK, HGTYPE, length=len(resp))
+    yield resp
+
 def branches(repo, req):
     nodes = []
     if 'nodes' in req.form:
@@ -97,7 +109,7 @@
     yield z.flush()
 
 def capabilities(repo, req):
-    caps = ['lookup', 'changegroupsubset']
+    caps = ['lookup', 'changegroupsubset', 'branchmap']
     if repo.ui.configbool('server', 'uncompressed', untrusted=True):
         caps.append('stream=%d' % repo.changelog.version)
     if changegroupmod.bundlepriority: