clone: copy obsolete markers during local clone

This change adds `obsstore` to the list of files copied by local clone,
until now changesets were copied without their obsolete markers.

Note: extinct changesets were and are still included by such clones to
enable hardlinking. There is no obvious reason to prevent their exchange
here.

Rebased by Patrick Mezard <[e-mail]>

mercurial/store.py

@@ -232,7 +232,8 b' def _calcmode(path):'
         mode = None
     return mode
 
-_data = 'data 00manifest.d 00manifest.i 00changelog.d 00changelog.i phaseroots'
+_data = ('data 00manifest.d 00manifest.i 00changelog.d 00changelog.i'
+         ' phaseroots obsstore')
 
 class basicstore(object):
     '''base class for local repository stores'''
@@ -411,7 +412,7 b' class fncachestore(basicstore):'
             self.fncache.rewrite(existing)
 
     def copylist(self):
-        d = ('data dh fncache phaseroots'
+        d = ('data dh fncache phaseroots obsstore'
              ' 00manifest.d 00manifest.i 00changelog.d 00changelog.i')
         return (['requires', '00changelog.i'] +
                 ['store/' + f for f in d.split()])

tests/test-obsolete.t

@@ -178,6 +178,53 b' Try to pull markers'
   ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 {'date': '1338 0', 'user': 'test'}
   1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 {'date': '1339 0', 'user': 'test'}
 
+clone support
+(markers are copied and extinct changesets are included to allow hardlinks)
+
+  $ hg clone tmpb clone-dest
+  updating to branch default
+  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg -R clone-dest log -G --hidden
+  @  changeset:   5:5601fb93a350
+  |  tag:         tip
+  |  parent:      1:7c3bad9141dc
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     add new_3_c
+  |
+  | x  changeset:   4:ca819180edb9
+  |/   parent:      1:7c3bad9141dc
+  |    user:        test
+  |    date:        Thu Jan 01 00:00:00 1970 +0000
+  |    summary:     add new_2_c
+  |
+  | x  changeset:   3:cdbce2fbb163
+  |/   parent:      1:7c3bad9141dc
+  |    user:        test
+  |    date:        Thu Jan 01 00:00:00 1970 +0000
+  |    summary:     add new_c
+  |
+  | o  changeset:   2:245bde4270cd
+  |/   user:        test
+  |    date:        Thu Jan 01 00:00:00 1970 +0000
+  |    summary:     add original_c
+  |
+  o  changeset:   1:7c3bad9141dc
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     add b
+  |
+  o  changeset:   0:1f0dee641bb7
+     user:        test
+     date:        Thu Jan 01 00:00:00 1970 +0000
+     summary:     add a
+  
+  $ hg -R clone-dest debugobsolete
+  245bde4270cd1072a27757984f9cda8ba26f08ca cdbce2fbb16313928851e97e0d85413f3f7eb77f 0 {'date': '56 12', 'user': 'test'}
+  cdbce2fbb16313928851e97e0d85413f3f7eb77f ca819180edb99ed25ceafb3e9584ac287e240b00 0 {'date': '1337 0', 'user': 'test'}
+  ca819180edb99ed25ceafb3e9584ac287e240b00 1337133713371337133713371337133713371337 0 {'date': '1338 0', 'user': 'test'}
+  1337133713371337133713371337133713371337 5601fb93a350734d935195fee37f4054c529ff39 0 {'date': '1339 0', 'user': 'test'}
+
 
 Destination repo have existing data
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