sshrepo: add passing of lookup exceptions

mercurial/sshrepo.py

@@ -133,9 +133,14 b' class sshrepository(remoterepository):'
 
     def lookup(self, key):
         d = self.call("lookup", key=key)
+        success, data = d[:-1].split(" ", 1)
         try:
-            return bin(d[:-1])
+            if int(success):
+                return bin(data)
+            else:
+                raise data
         except:
+            raise
             raise hg.RepoError("unexpected response '%s'" % (d[:400] + "..."))
 
     def heads(self):

mercurial/sshserver.py

@@ -51,7 +51,13 b' class sshserver(object):'
     def do_lookup(self):
         arg, key = self.getarg()
         assert arg == 'key'
-        self.respond(hex(self.repo.lookup(key)) + "\n")
+        try:
+            r = hex(self.repo.lookup(key))
+            success = 1
+        except Exception,inst:
+            r = str(inst)
+            success = 0
+        self.respond("%s %s\n" % (success, r))
 
     def do_heads(self):
         h = self.repo.heads()