[PATCH 2 of 2] unionrepo: override the _phasecache() to return a union phasecaches of two repos

[elson.wei at gmail.com]

# HG changeset patch
# User Wei, Elson <elson.wei at gmail.com>
# Date 1395970218 -28800
#      Fri Mar 28 09:30:18 2014 +0800
# Node ID 209c9e7394bb8b59b01048abe2cc225456132eca
# Parent  077d695569cc1c6012b3aa6fb742b9dac22b133d
unionrepo: override the _phasecache() to return a union phasecaches of two repos

The phase roots of the repo2 are not loaded. All revisions in repo2 will become
'public'.

diff --git a/mercurial/unionrepo.py b/mercurial/unionrepo.py
--- a/mercurial/unionrepo.py
+++ b/mercurial/unionrepo.py
@@ -15,7 +15,7 @@
 from i18n import _
 import os
 import util, mdiff, cmdutil, scmutil
-import localrepo, changelog, manifest, filelog, revlog
+import localrepo, changelog, manifest, filelog, revlog, phases
 
 class unionrevlog(revlog.revlog):
     def __init__(self, opener, indexfile, revlog2, linkmapper):
@@ -177,6 +177,12 @@
         self.repo2 = localrepo.localrepository(ui, path2)
 
     @localrepo.unfilteredpropertycache
+    def _phasecache(self):
+        cache = phases.phasecache(self, self._phasedefaults)
+        cache.union(phases.phasecache(self.repo2, self._phasedefaults))
+        return cache
+
+    @localrepo.unfilteredpropertycache
     def changelog(self):
         return unionchangelog(self.sopener, self.repo2.sopener)
 
diff --git a/tests/test-unionrepo.t b/tests/test-unionrepo.t
--- a/tests/test-unionrepo.t
+++ b/tests/test-unionrepo.t
@@ -148,3 +148,9 @@
   2:68c0685446a3  repo1-2
   1:8a58db72e69d  repo1-1
   0:f093fec0529b  repo1-0
+
+check the phase
+
+  $ hg -R union:repo1+repo2 phase -r 0:1
+  0: draft
+  1: draft