largefiles: mark lfile as added in lfdirstate when the standin is added stable

largefiles: mark lfile as added in lfdirstate when the standin is added

This is an alternative solution to the problem addressed by f72d73937853. This
implementation has the advantage that it doesn't mark clean largefiles as
normallookup. We can thus avoid repeated rehashing of all largefiles when
f72d73937853 is backed out.

This implementation use the existing 'lfmr' actions that 23fe278bde43
introduced for handling another part of the same cases.

--- a/hgext/largefiles/overrides.py	Wed Dec 31 14:45:02 2014 +0100
+++ b/hgext/largefiles/overrides.py	Wed Dec 31 14:46:02 2014 +0100
@@ -445,7 +445,7 @@
     removes = set(a[0] for a in actions['r'])
 
     newglist = []
-    lfmr = [] # LargeFiles: Mark as Removed
+    lfmr = [] # LargeFiles: Mark as Removed ... and mark largefile as added
     for action in actions['g']:
         f, args, msg = action
         splitstandin = f and lfutil.splitstandin(f)
@@ -514,10 +514,14 @@
 
 def mergerecordupdates(orig, repo, actions, branchmerge):
     if 'lfmr' in actions:
-        # this should be executed before 'orig', to execute 'remove'
-        # before all other actions
+        lfdirstate = lfutil.openlfdirstate(repo.ui, repo)
         for lfile, args, msg in actions['lfmr']:
+            # this should be executed before 'orig', to execute 'remove'
+            # before all other actions
             repo.dirstate.remove(lfile)
+            # make sure lfile doesn't get synclfdirstate'd as normal
+            lfdirstate.add(lfile)
+        lfdirstate.write()
 
     return orig(repo, actions, branchmerge)