convert/mtn: convert suspended branches as closed branches

Monotone treats branch closing ("suspending") in a similar manner to how we do
in mercurial - a cert is added to a revision that marks the branch to be hidden.
If a subsequent commit is made, the branch is effectively reopened.

hgext/convert/monotone.py

@@ -291,14 +291,18 b' class monotone_source(converter_source, '
         return data, attr
 
     def getcommit(self, rev):
+        extra = {}
         certs   = self.mtngetcerts(rev)
+        if certs.get('suspend') == certs["branch"]:
+            extra['close'] = '1'
         return commit(
             author=certs["author"],
             date=util.datestr(util.strdate(certs["date"], "%Y-%m-%dT%H:%M:%S")),
             desc=certs["changelog"],
             rev=rev,
             parents=self.mtnrun("parents", rev).splitlines(),
-            branch=certs["branch"])
+            branch=certs["branch"],
+            extra=extra)
 
     def gettags(self):
         tags = {}

tests/test-convert-mtn.t

@@ -207,6 +207,10 b' test diverging directory moves'
   $ mtn ci -m divergentdirmove2
   mtn: beginning commit on branch 'com.selenic.test'
   mtn: committed revision 4a736634505795f17786fffdf2c9cbf5b11df6f6
+
+test suspending (closing a branch)
+
+  $ mtn suspend 4a736634505795f17786fffdf2c9cbf5b11df6f6 2> /dev/null
   $ cd ..
 
 convert incrementally
@@ -355,3 +359,10 b' check divergent directory moves'
   dir8-2/a
   dir9-2/b
   e
+
+check branch closing
+
+  $ hg branches -a
+  $ hg branches -c
+  com.selenic.test              13:* (closed) (glob)
+