annotate tests/test-rewind.t @ 3865:b945f2dae587

rewind: add a test for rewinding a fold

The code already have basic support for case. However the result create orphan
that will need to be improved. However, we keep this changeset simple.

This test file test the rewind command in several situations.

Global setup
============

  $ . $TESTDIR/testlib/common.sh
  $ cat >> $HGRCPATH <<EOF
  > [ui]
  > interactive = true
  > [phases]
  > publish=False
  > [extensions]
  > evolve =
  > EOF

  $ hg init rewind-testing-base
  $ cd rewind-testing-base
  $ echo a > root
  $ hg add root
  $ hg ci -m 'c_ROOT'
  $ echo a > A
  $ hg add A
  $ hg ci -m 'c_A0'
  $ echo a > B
  $ hg add B
  $ hg ci -m 'c_B0'
  $ hg log -G
  @  changeset:   2:7e594302a05d
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  

  $ cd ..

Test rewinding to single changesets
====================================

  $ hg clone rewind-testing-base rewind-testing-simple-prune
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd rewind-testing-simple-prune

Prune changeset unrelated to the working copy
---------------------------------------------

Setup
`````

Update to an unrelated changeset

  $ hg up 'desc("c_ROOT")'
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved

Prune the head

  $ hg prune -r 'desc("c_B0")'
  1 changesets pruned
  $ hg log -G
  o  changeset:   1:579f120ba918
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  @  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  

Actual rewind
`````````````

  $ hg rewind --hidden --to 'desc("c_B0")'
  rewinded to 1 changesets
  $ hg debugobsolete
  7e594302a05d3769b27be88fc3cdfd39d7498498 0 {579f120ba91885449adc92eedf48ef3569742cee} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
  7e594302a05d3769b27be88fc3cdfd39d7498498 073989a581cf430a844192364fa37606357cbbc2 4 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '2', 'operation': 'rewind', 'user': 'test'}
  $ hg obslog -r 'desc("c_B0")'
  o  073989a581cf (3) c_B0
  |
  x  7e594302a05d (2) c_B0
       pruned using prune by test (Thu Jan 01 00:00:00 1970 +0000)
       rewritten(meta) as 073989a581cf using rewind by test (Thu Jan 01 00:00:00 1970 +0000)
  
  $ hg log -G
  o  changeset:   3:073989a581cf
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  @  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  
XXX-TODO: fix the obsfate from "meta-changed as 3" to "identical" or something.

  $ hg log -G --hidden
  o  changeset:   3:073989a581cf
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_B0
  |
  | x  changeset:   2:7e594302a05d
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    obsolete:    meta-changed using rewind as 3:073989a581cf
  |    summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  @  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  

Other independant rewind create a different revision
----------------------------------------------------------

setup
`````

note: we use "default-date" to make it a "different rewind"

  $ echo '[devel]' >> $HGRCPATH
  $ echo 'default-date = 1 0' >> $HGRCPATH

Actual rewind
`````````````

  $ hg prune 'desc("c_B0")'
  1 changesets pruned
  $ hg rewind --hidden --to 'min(desc("c_B0"))'
  rewinded to 1 changesets
  $ hg debugobsolete
  7e594302a05d3769b27be88fc3cdfd39d7498498 0 {579f120ba91885449adc92eedf48ef3569742cee} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
  7e594302a05d3769b27be88fc3cdfd39d7498498 073989a581cf430a844192364fa37606357cbbc2 4 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '2', 'operation': 'rewind', 'user': 'test'}
  073989a581cf430a844192364fa37606357cbbc2 0 {579f120ba91885449adc92eedf48ef3569742cee} (Thu Jan 01 00:00:01 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
  7e594302a05d3769b27be88fc3cdfd39d7498498 48acf2c0d9c8961859ce9a913671eb2adc9b057b 4 (Thu Jan 01 00:00:01 1970 +0000) {'ef1': '34', 'operation': 'rewind', 'user': 'test'}
  $ hg obslog -r 'desc("c_B0")' --all
  x  073989a581cf (3) c_B0
  |    pruned using prune by test (Thu Jan 01 00:00:01 1970 +0000)
  |
  | o  48acf2c0d9c8 (4) c_B0
  |/
  x  7e594302a05d (2) c_B0
       pruned using prune by test (Thu Jan 01 00:00:00 1970 +0000)
       rewritten(meta) as 073989a581cf using rewind by test (Thu Jan 01 00:00:00 1970 +0000)
       rewritten(meta, date) as 48acf2c0d9c8 using rewind by test (Thu Jan 01 00:00:01 1970 +0000)
  
  $ hg log -G
  o  changeset:   4:48acf2c0d9c8
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:01 1970 +0000
  |  summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  @  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  
  $ hg log -G --hidden
  o  changeset:   4:48acf2c0d9c8
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:01 1970 +0000
  |  summary:     c_B0
  |
  | x  changeset:   3:073989a581cf
  |/   parent:      1:579f120ba918
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    obsolete:    pruned using prune
  |    summary:     c_B0
  |
  | x  changeset:   2:7e594302a05d
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    obsolete:    rewritten using rewind as 4:48acf2c0d9c8
  |    obsolete:    meta-changed using rewind as 3:073989a581cf
  |    summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  @  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  
  $ cd ..

rewind a simple amend - creating content-divergence
---------------------------------------------------

Setup
`````

  $ hg clone rewind-testing-base rewind-testing-single-rewrite
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd rewind-testing-single-rewrite
  $ echo BB > B
  $ hg amend -m 'c_B1'
  $ hg log -G
  @  changeset:   3:25c8f5ab0c3b
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_B1
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  

Actual rewind
`````````````

  $ hg rewind --hidden --to 'desc("c_B0")' --as-divergence
  2 new content-divergent changesets
  rewinded to 1 changesets
  $ hg debugobsolete
  7e594302a05d3769b27be88fc3cdfd39d7498498 25c8f5ab0c3bb569ec672570f1a901be4c6f032b 0 (Thu Jan 01 00:00:01 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
  7e594302a05d3769b27be88fc3cdfd39d7498498 48acf2c0d9c8961859ce9a913671eb2adc9b057b 4 (Thu Jan 01 00:00:01 1970 +0000) {'ef1': '34', 'operation': 'rewind', 'user': 'test'}
  $ hg obslog --rev 'desc("c_B0")'
  *  48acf2c0d9c8 (4) c_B0
  |
  x  7e594302a05d (2) c_B0
       rewritten(description, content) as 25c8f5ab0c3b using amend by test (Thu Jan 01 00:00:01 1970 +0000)
       rewritten(meta, date) as 48acf2c0d9c8 using rewind by test (Thu Jan 01 00:00:01 1970 +0000)
  
  $ hg log -G
  *  changeset:   4:48acf2c0d9c8
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:01 1970 +0000
  |  instability: content-divergent
  |  summary:     c_B0
  |
  | @  changeset:   3:25c8f5ab0c3b
  |/   parent:      1:579f120ba918
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    instability: content-divergent
  |    summary:     c_B1
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  
  $ hg log -G --hidden
  *  changeset:   4:48acf2c0d9c8
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:01 1970 +0000
  |  instability: content-divergent
  |  summary:     c_B0
  |
  | @  changeset:   3:25c8f5ab0c3b
  |/   parent:      1:579f120ba918
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    instability: content-divergent
  |    summary:     c_B1
  |
  | x  changeset:   2:7e594302a05d
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    obsolete:    rewritten using rewind as 4:48acf2c0d9c8
  |    obsolete:    rewritten using amend as 3:25c8f5ab0c3b
  |    summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  

Cleanup
```````
  $ hg prune 'max(desc("c_B0"))'
  1 changesets pruned
  $ hg log -G
  @  changeset:   3:25c8f5ab0c3b
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_B1
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  
  $ echo 'default-date = 2 0' >> $HGRCPATH

rewind a simple amend - obsoleting the current latest successors
----------------------------------------------------------------

  $ hg rewind --hidden --to 'min(desc("c_B0"))'
  rewinded to 1 changesets
  (1 changesets obsoleted)
  working directory is now at d8b4471cfb3c
  $ hg debugobsolete
  7e594302a05d3769b27be88fc3cdfd39d7498498 25c8f5ab0c3bb569ec672570f1a901be4c6f032b 0 (Thu Jan 01 00:00:01 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
  7e594302a05d3769b27be88fc3cdfd39d7498498 48acf2c0d9c8961859ce9a913671eb2adc9b057b 4 (Thu Jan 01 00:00:01 1970 +0000) {'ef1': '34', 'operation': 'rewind', 'user': 'test'}
  48acf2c0d9c8961859ce9a913671eb2adc9b057b 0 {579f120ba91885449adc92eedf48ef3569742cee} (Thu Jan 01 00:00:01 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
  7e594302a05d3769b27be88fc3cdfd39d7498498 d8b4471cfb3caa290e0a78ae6bc57d78656c9075 4 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '34', 'operation': 'rewind', 'user': 'test'}
  25c8f5ab0c3bb569ec672570f1a901be4c6f032b d8b4471cfb3caa290e0a78ae6bc57d78656c9075 0 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '43', 'operation': 'rewind', 'user': 'test'}
  $ hg obslog --rev 'desc("c_B0")'
  @    d8b4471cfb3c (5) c_B0
  |\
  x |  25c8f5ab0c3b (3) c_B1
  |/     rewritten(description, meta, date, content) as d8b4471cfb3c using rewind by test (Thu Jan 01 00:00:02 1970 +0000)
  |
  x  7e594302a05d (2) c_B0
       rewritten(description, content) as 25c8f5ab0c3b using amend by test (Thu Jan 01 00:00:01 1970 +0000)
       rewritten(meta, date) as 48acf2c0d9c8 using rewind by test (Thu Jan 01 00:00:01 1970 +0000)
       rewritten(meta, date) as d8b4471cfb3c using rewind by test (Thu Jan 01 00:00:02 1970 +0000)
  
  $ hg log -G
  @  changeset:   5:d8b4471cfb3c
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:02 1970 +0000
  |  summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  
  $ hg log -G --hidden
  @  changeset:   5:d8b4471cfb3c
  |  tag:         tip
  |  parent:      1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:02 1970 +0000
  |  summary:     c_B0
  |
  | x  changeset:   4:48acf2c0d9c8
  |/   parent:      1:579f120ba918
  |    user:        test
  |    date:        Thu Jan 01 00:00:01 1970 +0000
  |    obsolete:    pruned using prune
  |    summary:     c_B0
  |
  | x  changeset:   3:25c8f5ab0c3b
  |/   parent:      1:579f120ba918
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    obsolete:    rewritten using rewind as 5:d8b4471cfb3c
  |    summary:     c_B1
  |
  | x  changeset:   2:7e594302a05d
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    obsolete:    rewritten using rewind as 5:d8b4471cfb3c
  |    obsolete:    rewritten using rewind as 4:48acf2c0d9c8
  |    obsolete:    rewritten using amend as 3:25c8f5ab0c3b
  |    summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  
  $ cd ..

rewind a simple split
---------------------

Setup
`````

  $ hg clone rewind-testing-base rewind-testing-split-fold
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd rewind-testing-split-fold

  $ echo C > C
  $ echo D > D
  $ hg add C D
  $ hg ci -m 'c_CD0'
  $ hg split << EOF
  > y
  > f
  > d
  > y
  > EOF
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  adding C
  adding D
  diff --git a/C b/C
  new file mode 100644
  examine changes to 'C'? [Ynesfdaq?] y
  
  @@ -0,0 +1,1 @@
  +C
  record change 1/2 to 'C'? [Ynesfdaq?] f
  
  diff --git a/D b/D
  new file mode 100644
  examine changes to 'D'? [Ynesfdaq?] d
  
  created new head
  Done splitting? [yN] y
  $ hg log -G
  @  changeset:   5:9576e80d6851
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:02 1970 +0000
  |  summary:     c_CD0
  |
  o  changeset:   4:a0316c4c5417
  |  parent:      2:7e594302a05d
  |  user:        test
  |  date:        Thu Jan 01 00:00:02 1970 +0000
  |  summary:     c_CD0
  |
  o  changeset:   2:7e594302a05d
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  
  $ hg debugobsolete
  49fb7d900906b0a3d329e90da4dcb0a7582d3b6e a0316c4c54179357e71d068fb8884678ebc7c351 9576e80d6851ce79cd535e2dc5fa01b444d89a39 0 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '12', 'operation': 'split', 'user': 'test'}
  $ hg obslog --all
  @  9576e80d6851 (5) c_CD0
  |
  | o  a0316c4c5417 (4) c_CD0
  |/
  x  49fb7d900906 (3) c_CD0
       rewritten(parent, content) as 9576e80d6851, a0316c4c5417 using split by test (Thu Jan 01 00:00:02 1970 +0000)
  

Actual rewind
`````````````

  $ hg rewind --hidden --to 'min(desc("c_CD0"))'
  rewinded to 1 changesets
  (2 changesets obsoleted)
  working directory is now at 4535d0af405c
  $ hg debugobsolete
  49fb7d900906b0a3d329e90da4dcb0a7582d3b6e a0316c4c54179357e71d068fb8884678ebc7c351 9576e80d6851ce79cd535e2dc5fa01b444d89a39 0 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '12', 'operation': 'split', 'user': 'test'}
  49fb7d900906b0a3d329e90da4dcb0a7582d3b6e 4535d0af405c1bf35f37b35f26ec6f9acfa6fe0b 4 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '2', 'operation': 'rewind', 'user': 'test'}
  9576e80d6851ce79cd535e2dc5fa01b444d89a39 4535d0af405c1bf35f37b35f26ec6f9acfa6fe0b 0 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '14', 'operation': 'rewind', 'user': 'test'}
  a0316c4c54179357e71d068fb8884678ebc7c351 4535d0af405c1bf35f37b35f26ec6f9acfa6fe0b 0 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '10', 'operation': 'rewind', 'user': 'test'}
  $ hg obslog
  @    4535d0af405c (6) c_CD0
  |\
  | \
  | |\
  | x |  9576e80d6851 (5) c_CD0
  |/ /     rewritten(meta, parent, content) as 4535d0af405c using rewind by test (Thu Jan 01 00:00:02 1970 +0000)
  | |
  | x  a0316c4c5417 (4) c_CD0
  |/     rewritten(meta, content) as 4535d0af405c using rewind by test (Thu Jan 01 00:00:02 1970 +0000)
  |
  x  49fb7d900906 (3) c_CD0
       rewritten(meta) as 4535d0af405c using rewind by test (Thu Jan 01 00:00:02 1970 +0000)
       rewritten(parent, content) as 9576e80d6851, a0316c4c5417 using split by test (Thu Jan 01 00:00:02 1970 +0000)
  
  $ hg log -G
  @  changeset:   6:4535d0af405c
  |  tag:         tip
  |  parent:      2:7e594302a05d
  |  user:        test
  |  date:        Thu Jan 01 00:00:02 1970 +0000
  |  summary:     c_CD0
  |
  o  changeset:   2:7e594302a05d
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT
  

rewind a fold
-------------

setup
`````

  $ echo 'default-date = 3 0' >> $HGRCPATH

note: the orphan creation is unfortunate, and should be fixed later.

Actual Rewind
`````````````

  $ hg rewind --to '9576e80d6851+a0316c4c5417' --hidden
  1 new orphan changesets
  rewinded to 2 changesets
  (1 changesets obsoleted)
  working directory is now at d3bb9de71a17
  $ hg debugobsolete
  49fb7d900906b0a3d329e90da4dcb0a7582d3b6e a0316c4c54179357e71d068fb8884678ebc7c351 9576e80d6851ce79cd535e2dc5fa01b444d89a39 0 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '12', 'operation': 'split', 'user': 'test'}
  49fb7d900906b0a3d329e90da4dcb0a7582d3b6e 4535d0af405c1bf35f37b35f26ec6f9acfa6fe0b 4 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '2', 'operation': 'rewind', 'user': 'test'}
  9576e80d6851ce79cd535e2dc5fa01b444d89a39 4535d0af405c1bf35f37b35f26ec6f9acfa6fe0b 0 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '14', 'operation': 'rewind', 'user': 'test'}
  a0316c4c54179357e71d068fb8884678ebc7c351 4535d0af405c1bf35f37b35f26ec6f9acfa6fe0b 0 (Thu Jan 01 00:00:02 1970 +0000) {'ef1': '10', 'operation': 'rewind', 'user': 'test'}
  9576e80d6851ce79cd535e2dc5fa01b444d89a39 d3bb9de71a17a85301bce02abc13114d2bc11615 4 (Thu Jan 01 00:00:03 1970 +0000) {'ef1': '34', 'operation': 'rewind', 'user': 'test'}
  a0316c4c54179357e71d068fb8884678ebc7c351 73a1ac2e570de1f33bbea7d8260b00d5af1d30a7 4 (Thu Jan 01 00:00:03 1970 +0000) {'ef1': '34', 'operation': 'rewind', 'user': 'test'}
  4535d0af405c1bf35f37b35f26ec6f9acfa6fe0b 73a1ac2e570de1f33bbea7d8260b00d5af1d30a7 d3bb9de71a17a85301bce02abc13114d2bc11615 0 (Thu Jan 01 00:00:03 1970 +0000) {'ef1': '46', 'operation': 'rewind', 'user': 'test'}
  $ hg obslog -r -2:
  o    73a1ac2e570d (8) c_CD0
  |\
  +---@  d3bb9de71a17 (7) c_CD0
  | | |
  x---+  4535d0af405c (6) c_CD0
  |\| |    rewritten(meta, date, parent, content) as 73a1ac2e570d, d3bb9de71a17 using rewind by test (Thu Jan 01 00:00:03 1970 +0000)
  | | |
  +---x  9576e80d6851 (5) c_CD0
  | |      rewritten(meta, parent, content) as 4535d0af405c using rewind by test (Thu Jan 01 00:00:02 1970 +0000)
  | |      rewritten(meta, date) as d3bb9de71a17 using rewind by test (Thu Jan 01 00:00:03 1970 +0000)
  | |
  | x  a0316c4c5417 (4) c_CD0
  |/     rewritten(meta, content) as 4535d0af405c using rewind by test (Thu Jan 01 00:00:02 1970 +0000)
  |      rewritten(meta, date) as 73a1ac2e570d using rewind by test (Thu Jan 01 00:00:03 1970 +0000)
  |
  x  49fb7d900906 (3) c_CD0
       rewritten(meta) as 4535d0af405c using rewind by test (Thu Jan 01 00:00:02 1970 +0000)
       rewritten(parent, content) as 9576e80d6851, a0316c4c5417 using split by test (Thu Jan 01 00:00:02 1970 +0000)
  
  $ hg log -G
  o  changeset:   8:73a1ac2e570d
  |  tag:         tip
  |  parent:      2:7e594302a05d
  |  user:        test
  |  date:        Thu Jan 01 00:00:03 1970 +0000
  |  summary:     c_CD0
  |
  | @  changeset:   7:d3bb9de71a17
  | |  parent:      4:a0316c4c5417
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:03 1970 +0000
  | |  instability: orphan
  | |  summary:     c_CD0
  | |
  | x  changeset:   4:a0316c4c5417
  |/   parent:      2:7e594302a05d
  |    user:        test
  |    date:        Thu Jan 01 00:00:02 1970 +0000
  |    obsolete:    split using rewind as 8:73a1ac2e570d, 7:d3bb9de71a17
  |    summary:     c_CD0
  |
  o  changeset:   2:7e594302a05d
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_B0
  |
  o  changeset:   1:579f120ba918
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c_A0
  |
  o  changeset:   0:eba9c2249fe7
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     c_ROOT