#
#
# patch "tracvc/mtn/backend.py"
#  from [a33b8861f9b69e4070166e3351a3962d5aa99d20]
#    to [35c9ba8f6a4795f433d9b8588c1945f41ee9e91e]
#
============================================================
--- tracvc/mtn/backend.py	a33b8861f9b69e4070166e3351a3962d5aa99d20
+++ tracvc/mtn/backend.py	35c9ba8f6a4795f433d9b8588c1945f41ee9e91e
@@ -38,6 +38,12 @@ import re
 from tracvc.mtn.util import get_oldpath, get_parent
 import re
 
+try:
+    from trac.versioncontrol.web_ui import IPropertyRenderer
+    has_property_renderer = True
+except ImportError:
+    has_property_renderer = False
+
 DATE_RULE = re.compile(r'\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}')
 REVID_RULE = re.compile(r'^[0-9a-f]{40}$')
 
@@ -479,7 +485,6 @@ class MonotoneChangeset(Changeset):
     """
     
     def __init__(self, mtn, rev, revpropspec = None):
-
         self.certs = mtn.certs(rev)
         self.messages = self.certs.get('changelog', ['-'])
         self.authors = self.certs.get('author', ['-'])
@@ -487,12 +492,17 @@ class MonotoneChangeset(Changeset):
         self.branches = self.certs.get('branch', [])
         self.tags = self.certs.get('tag', [])
 
-        # always pick the first
-        message = self.messages[0]
-        author = self.authors[0]
+        # multiple dates not supported, so pick the first date
         date = self.dates[0]
-
+        
+        # Trac doesn't support multiple authors
+        author = ', '.join(self.authors)
+        
+        # concatenate the commit messages
+        message = '\n----\n'.join(self.messages)
+        
         Changeset.__init__(self, rev, message, author, date)
+        
         self.mtn = mtn
         self.revpropspec = revpropspec or {}
 
@@ -532,36 +542,44 @@ class MonotoneChangeset(Changeset):
                 oldpath = get_oldpath(path, changeset.renamed)
                 yield path, Node.FILE, Changeset.EDIT, oldpath, oldrev
             
-    def get_properties(self):
-        """
-        Generator that provides additional metadata for this
-        changeset.
-        
-        Each additional property is a 4 element tuple:
-        * `name` is the name of the property,
-        * `text` its value
-        * `wikiflag` indicates whether the `text` should be
-        interpreted as wiki text or not
-        * `htmlclass` enables to attach special formatting to the
-        displayed property, e.g. `'author'`, `'time'`, `'message'` or
-        `'changeset'`.
-        """
-        for author in self.authors[1:]:
-            yield('+Author', author, True, 'author')
-        # fixme: print additional dates?
-        for parent in self.mtn.parents(self.rev):
-            yield('Parent', '[cset:%s]' % parent, True, 'changeset')
-        for child in self.mtn.children(self.rev):
-            yield('Child', '[cset:%s]' % child, True, 'changeset')
-        for branch in self.branches:
-            #yield('Branch', '[branch:%s]' % branch, True, 'changeset')
-            yield('Branch', branch, False, 'changeset')
-        for tag in self.tags:
-            yield('Tag', '[revtag:%s]' % tag, True, 'changeset')
-        for message in self.messages[1:]:
-            yield('+Message', message, True, 'message')
+    if has_property_renderer:
+        def get_properties(self):
+            properties = {}
+            properties['Parent'] = ', '.join(self.mtn.parents(self.rev))
+            properties['Child']  = ', '.join(self.mtn.children(self.rev))
+            properties['Branch'] = ', '.join(self.branches)
+            properties['Tag'] = ', '.join(self.tags)
+            # FIXME: add user-defined revision properties
+            return properties
 
+    else: # legacy
+        def get_properties(self):
+            """
+            Generator that provides additional metadata for this
+            changeset.
+
+            Each additional property is a 4 element tuple:
+            * `name` is the name of the property,
+            * `text` its value
+            * `wikiflag` indicates whether the `text` should be
+            interpreted as wiki text or not
+            * `htmlclass` enables to attach special formatting to the
+            displayed property, e.g. `'author'`, `'time'`, `'message'` or
+            `'changeset'`.
+            """
+            # multiple authors and messages are concatenated,
+            # additional dates are not printed
+            for parent in self.mtn.parents(self.rev):
+                yield('Parent', '[cset:%s]' % parent, True, 'changeset')
+            for child in self.mtn.children(self.rev):
+                yield('Child', '[cset:%s]' % child, True, 'changeset')
+            for branch in self.branches:
+                #yield('Branch', '[branch:%s]' % branch, True, 'changeset')
+                yield('Branch', branch, False, 'changeset')
+            for tag in self.tags:
+                yield('Tag', '[revtag:%s]' % tag, True, 'changeset')
+
+            # user-defined revision properties to be displayed
+            for cert, spec in self.revpropspec.iteritems():
+                for certvalue in self.certs.get(cert, []):
+                    yield(spec[0], spec[1] % certvalue, spec[2], spec[3])
-        # user-defined revision properties to be displayed
-        for cert, spec in self.revpropspec.iteritems():
-            for certvalue in self.certs.get(cert, []):
-                yield(spec[0], spec[1] % certvalue, spec[2], spec[3])