view tests/test-strip.t @ 42044:bb271ec2fbfb

compression: introduce a `storage.revlog.zstd.level` configuration This option control the zstd compression level used when compressing revlog chunk. The usage of zstd for revlog compression has not graduated from experimental yet, but we intend to fix that soon. The option name for the compression level is more straight forward to pick, so this changesets comes first. Having a dedicated option for each compression engine is useful because they don't support the same range of values. I ran the same measurement as for the zlib compression level (in the parent changesets). The variation in repository size is stay mostly in the same (small) range. The "read/write" performance see smallish variation, but are overall much better than zlib. Write performance show the same tend of having better write performance for when reaching high-end compression. Again, we don't intend to change the default zstd compression level (currently: 3) in this series. However this is worth investigating in the future. The Performance comparison of zlib vs zstd is quite impressive. The repository size stay in the same range, but the performance are much better in all situations. Comparison summary ================== We are looking at: - performance range for zlib - performance range for zstd - comparison of default zstd (level-3) to default zlib (level 6) - comparison of the slowest zstd time to the fastest zlib time Read performance: ----------------- | zlib | zstd | cmp | f2s mercurial | 0.170159 - 0.189219 | 0.144127 - 0.149624 | 80% | 88% pypy | 2.679217 - 2.768691 | 1.532317 - 1.705044 | 60% | 63% netbeans | 122.477027 - 141.620281 | 72.996346 - 89.731560 | 58% | 73% mozilla | 147.867662 - 170.572118 | 91.700995 - 105.853099 | 56% | 71% Write performance: ------------------ | zlib | zstd | cmp | f2s mercurial | 53.250304 - 56.2936129 | 40.877025 - 45.677286 | 75% | 86% pypy | 460.721984 - 476.589918 | 270.545409 - 301.002219 | 63% | 65% netbeans | 520.560316 - 715.930400 | 370.356311 - 428.329652 | 55% | 82% mozilla | 739.803002 - 987.056093 | 505.152906 - 591.930683 | 57% | 80% Raw data -------- repo alg lvl .hg/store size 00manifest.d read write mercurial zlib 1 49,402,813 5,963,475 0.170159 53.250304 mercurial zlib 6 47,197,397 5,875,730 0.182820 56.264320 mercurial zlib 9 47,121,596 5,849,781 0.189219 56.293612 mercurial zstd 1 49,737,084 5,966,355 0.144127 40.877025 mercurial zstd 3 48,961,867 5,895,208 0.146376 42.268142 mercurial zstd 5 48,200,592 5,938,676 0.149624 43.162875 mercurial zstd 10 47,833,520 5,913,353 0.145185 44.012489 mercurial zstd 15 47,314,604 5,728,679 0.147686 45.677286 mercurial zstd 20 47,330,502 5,830,539 0.145789 45.025407 mercurial zstd 22 47,330,076 5,830,539 0.143996 44.690460 pypy zlib 1 370,830,572 28,462,425 2.679217 460.721984 pypy zlib 6 340,112,317 27,648,747 2.768691 467.537158 pypy zlib 9 338,360,736 27,639,003 2.763495 476.589918 pypy zstd 1 362,377,479 27,916,214 1.532317 270.545409 pypy zstd 3 354,137,693 27,905,988 1.686718 294.951509 pypy zstd 5 342,640,043 27,655,774 1.705044 301.002219 pypy zstd 10 334,224,327 27,164,493 1.567287 285.186239 pypy zstd 15 329,000,363 26,645,965 1.637729 299.561332 pypy zstd 20 324,534,039 26,199,547 1.526813 302.149827 pypy zstd 22 324,530,595 26,198,932 1.525718 307.821218 netbeans zlib 1 1,281,847,810 165,495,457 122.477027 520.560316 netbeans zlib 6 1,205,284,353 159,161,207 139.876147 715.930400 netbeans zlib 9 1,197,135,671 155,034,586 141.620281 678.297064 netbeans zstd 1 1,259,581,737 160,840,613 72.996346 370.356311 netbeans zstd 3 1,232,978,122 157,691,551 81.622317 396.733087 netbeans zstd 5 1,208,034,075 160,246,880 83.080549 364.342626 netbeans zstd 10 1,188,624,176 156,083,417 79.323935 403.594602 netbeans zstd 15 1,176,973,589 153,859,477 89.731560 428.329652 netbeans zstd 20 1,162,958,258 151,147,535 82.842667 392.335349 netbeans zstd 22 1,162,707,029 151,150,220 82.565695 402.840655 mozilla zlib 1 2,775,497,186 298,527,987 147.867662 751.263721 mozilla zlib 6 2,596,856,420 286,597,671 170.572118 987.056093 mozilla zlib 9 2,587,542,494 287,018,264 163.622338 739.803002 mozilla zstd 1 2,723,159,348 286,617,532 91.700995 570.042751 mozilla zstd 3 2,665,055,001 286,152,013 95.240155 561.412805 mozilla zstd 5 2,607,819,817 288,060,030 101.978048 505.152906 mozilla zstd 10 2,558,761,085 283,967,648 104.113481 497.771202 mozilla zstd 15 2,526,216,060 275,581,300 105.853099 591.930683 mozilla zstd 20 2,485,114,806 266,478,859 95.268795 576.515389 mozilla zstd 22 2,484,869,080 266,456,505 94.429282 572.785537
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Wed, 27 Mar 2019 18:35:59 +0100
parents 943248e47864
children 1acaa9f37377
line wrap: on
line source

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "strip=" >> $HGRCPATH
  $ echo "drawdag=$TESTDIR/drawdag.py" >> $HGRCPATH

  $ restore() {
  >     hg unbundle -q .hg/strip-backup/*
  >     rm .hg/strip-backup/*
  > }
  $ teststrip() {
  >     hg up -C $1
  >     echo % before update $1, strip $2
  >     hg parents
  >     hg --traceback strip $2
  >     echo % after update $1, strip $2
  >     hg parents
  >     restore
  > }

  $ hg init test
  $ cd test

  $ echo foo > bar
  $ hg ci -Ama
  adding bar

  $ echo more >> bar
  $ hg ci -Amb

  $ echo blah >> bar
  $ hg ci -Amc

  $ hg up 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo blah >> bar
  $ hg ci -Amd
  created new head

  $ echo final >> bar
  $ hg ci -Ame

  $ hg log
  changeset:   4:443431ffac4f
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     e
  
  changeset:   3:65bd5f99a4a3
  parent:      1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     d
  
  changeset:   2:264128213d29
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     c
  
  changeset:   1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  changeset:   0:9ab35a2d17cb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     a
  

  $ teststrip 4 4
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  % before update 4, strip 4
  changeset:   4:443431ffac4f
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     e
  
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  % after update 4, strip 4
  changeset:   3:65bd5f99a4a3
  tag:         tip
  parent:      1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     d
  
  $ teststrip 4 3
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  % before update 4, strip 3
  changeset:   4:443431ffac4f
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     e
  
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  % after update 4, strip 3
  changeset:   1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  $ teststrip 1 4
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  % before update 1, strip 4
  changeset:   1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  % after update 1, strip 4
  changeset:   1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  $ teststrip 4 2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  % before update 4, strip 2
  changeset:   4:443431ffac4f
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     e
  
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  % after update 4, strip 2
  changeset:   3:443431ffac4f
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     e
  
  $ teststrip 4 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  % before update 4, strip 1
  changeset:   4:264128213d29
  tag:         tip
  parent:      1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     c
  
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  % after update 4, strip 1
  changeset:   0:9ab35a2d17cb
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     a
  
  $ teststrip null 4
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  % before update null, strip 4
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  % after update null, strip 4

  $ hg log
  changeset:   4:264128213d29
  tag:         tip
  parent:      1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     c
  
  changeset:   3:443431ffac4f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     e
  
  changeset:   2:65bd5f99a4a3
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     d
  
  changeset:   1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  changeset:   0:9ab35a2d17cb
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     a
  
  $ hg up -C 4
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg parents
  changeset:   4:264128213d29
  tag:         tip
  parent:      1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     c
  

  $ hg --traceback strip 4
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/264128213d29-0b39d6bf-backup.hg
  $ hg parents
  changeset:   1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  $ hg debugbundle .hg/strip-backup/*
  Stream params: {Compression: BZ}
  changegroup -- {nbchanges: 1, version: 02} (mandatory: True)
      264128213d290d868c54642d13aeaa3675551a78
  cache:rev-branch-cache -- {} (mandatory: False)
  phase-heads -- {} (mandatory: True)
      264128213d290d868c54642d13aeaa3675551a78 draft
  $ hg unbundle .hg/strip-backup/*
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 1 files (+1 heads)
  new changesets 264128213d29 (1 drafts)
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ rm .hg/strip-backup/*
  $ hg log --graph
  o  changeset:   4:264128213d29
  |  tag:         tip
  |  parent:      1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c
  |
  | o  changeset:   3:443431ffac4f
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     e
  | |
  | o  changeset:   2:65bd5f99a4a3
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     d
  |
  @  changeset:   1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b
  |
  o  changeset:   0:9ab35a2d17cb
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  
  $ hg up -C 2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg merge 4
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

before strip of merge parent

  $ hg parents
  changeset:   2:65bd5f99a4a3
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     d
  
  changeset:   4:264128213d29
  tag:         tip
  parent:      1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     c
  
  $ hg strip 4
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)

after strip of merge parent

  $ hg parents
  changeset:   1:ef3a871183d7
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  $ restore

  $ hg up
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to "264128213d29: c"
  1 other heads for branch "default"
  $ hg log -G
  @  changeset:   4:264128213d29
  |  tag:         tip
  |  parent:      1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c
  |
  | o  changeset:   3:443431ffac4f
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     e
  | |
  | o  changeset:   2:65bd5f99a4a3
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     d
  |
  o  changeset:   1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b
  |
  o  changeset:   0:9ab35a2d17cb
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  

2 is parent of 3, only one strip should happen

  $ hg strip "roots(2)" 3
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  $ hg log -G
  @  changeset:   2:264128213d29
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     c
  |
  o  changeset:   1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b
  |
  o  changeset:   0:9ab35a2d17cb
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  
  $ restore
  $ hg log -G
  o  changeset:   4:443431ffac4f
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     e
  |
  o  changeset:   3:65bd5f99a4a3
  |  parent:      1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     d
  |
  | @  changeset:   2:264128213d29
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     c
  |
  o  changeset:   1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b
  |
  o  changeset:   0:9ab35a2d17cb
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  
Failed hook while applying "saveheads" bundle.

  $ hg strip 2 --config hooks.pretxnchangegroup.bad=false
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  transaction abort!
  rollback completed
  strip failed, backup bundle stored in '$TESTTMP/test/.hg/strip-backup/*-backup.hg' (glob)
  strip failed, unrecovered changes stored in '$TESTTMP/test/.hg/strip-backup/*-temp.hg' (glob)
  (fix the problem, then recover the changesets with "hg unbundle '$TESTTMP/test/.hg/strip-backup/*-temp.hg'") (glob)
  abort: pretxnchangegroup.bad hook exited with status 1
  [255]
  $ restore
  $ hg log -G
  o  changeset:   4:443431ffac4f
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     e
  |
  o  changeset:   3:65bd5f99a4a3
  |  parent:      1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     d
  |
  | o  changeset:   2:264128213d29
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     c
  |
  @  changeset:   1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b
  |
  o  changeset:   0:9ab35a2d17cb
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  

2 different branches: 2 strips

  $ hg strip 2 4
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  $ hg log -G
  o  changeset:   2:65bd5f99a4a3
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     d
  |
  @  changeset:   1:ef3a871183d7
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b
  |
  o  changeset:   0:9ab35a2d17cb
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  
  $ restore

2 different branches and a common ancestor: 1 strip

  $ hg strip 1 "2|4"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  $ restore

verify fncache is kept up-to-date

  $ touch a
  $ hg ci -qAm a
#if repofncache
  $ cat .hg/store/fncache | sort
  data/a.i
  data/bar.i
#endif

  $ hg strip tip
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
#if repofncache
  $ cat .hg/store/fncache
  data/bar.i
#endif

stripping an empty revset

  $ hg strip "1 and not 1"
  abort: empty revision set
  [255]

remove branchy history for qimport tests

  $ hg strip 3
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)


strip of applied mq should cleanup status file

  $ echo "mq=" >> $HGRCPATH
  $ hg up -C 3
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo fooagain >> bar
  $ hg ci -mf
  $ hg qimport -r tip:2

applied patches before strip

  $ hg qapplied
  d
  e
  f

stripping revision in queue

  $ hg strip 3
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)

applied patches after stripping rev in queue

  $ hg qapplied
  d

stripping ancestor of queue

  $ hg strip 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)

applied patches after stripping ancestor of queue

  $ hg qapplied

Verify strip protects against stripping wc parent when there are uncommitted mods

  $ echo b > b
  $ echo bb > bar
  $ hg add b
  $ hg ci -m 'b'
  $ hg log --graph
  @  changeset:   1:76dcf9fab855
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     b
  |
  o  changeset:   0:9ab35a2d17cb
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  
  $ hg up 0
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo c > bar
  $ hg up -t false
  merging bar
  merging bar failed!
  1 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges
  [1]
  $ hg sum
  parent: 1:76dcf9fab855 tip
   b
  branch: default
  commit: 1 modified, 1 unknown, 1 unresolved
  update: (current)
  phases: 2 draft
  mq:     3 unapplied

  $ echo c > b
  $ hg strip tip
  abort: local changes found
  [255]
  $ hg strip tip --keep
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  $ hg log --graph
  @  changeset:   0:9ab35a2d17cb
     tag:         tip
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     a
  
  $ hg status
  M bar
  ? b
  ? bar.orig

  $ rm bar.orig
  $ hg sum
  parent: 0:9ab35a2d17cb tip
   a
  branch: default
  commit: 1 modified, 1 unknown
  update: (current)
  phases: 1 draft
  mq:     3 unapplied

Strip adds, removes, modifies with --keep

  $ touch b
  $ hg add b
  $ hg commit -mb
  $ touch c

... with a clean working dir

  $ hg add c
  $ hg rm bar
  $ hg commit -mc
  $ hg status
  $ hg strip --keep tip
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  $ hg status
  ! bar
  ? c

... with a dirty working dir

  $ hg add c
  $ hg rm bar
  $ hg commit -mc
  $ hg status
  $ echo b > b
  $ echo d > d
  $ hg strip --keep tip
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  $ hg status
  M b
  ! bar
  ? c
  ? d

... after updating the dirstate
  $ hg add c
  $ hg commit -mc
  $ hg rm c
  $ hg commit -mc
  $ hg strip --keep '.^' -q
  $ cd ..

stripping many nodes on a complex graph (issue3299)

  $ hg init issue3299
  $ cd issue3299
  $ hg debugbuilddag '@a.:a@b.:b.:x<a@a.:a<b@b.:b<a@a.:a'
  $ hg strip 'not ancestors(x)'
  saved backup bundle to $TESTTMP/issue3299/.hg/strip-backup/*-backup.hg (glob)

test hg strip -B bookmark

  $ cd ..
  $ hg init bookmarks
  $ cd bookmarks
  $ hg debugbuilddag '..<2.*1/2:m<2+3:c<m+3:a<2.:b<m+2:d<2.:e<m+1:f'
  $ hg bookmark -r 'a' 'todelete'
  $ hg bookmark -r 'b' 'B'
  $ hg bookmark -r 'b' 'nostrip'
  $ hg bookmark -r 'c' 'delete'
  $ hg bookmark -r 'd' 'multipledelete1'
  $ hg bookmark -r 'e' 'multipledelete2'
  $ hg bookmark -r 'f' 'singlenode1'
  $ hg bookmark -r 'f' 'singlenode2'
  $ hg up -C todelete
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark todelete)
  $ hg strip -B nostrip
  bookmark 'nostrip' deleted
  abort: empty revision set
  [255]
  $ hg strip -B todelete
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/bookmarks/.hg/strip-backup/*-backup.hg (glob)
  bookmark 'todelete' deleted
  $ hg id -ir dcbb326fdec2
  abort: unknown revision 'dcbb326fdec2'!
  [255]
  $ hg id -ir d62d843c9a01
  d62d843c9a01
  $ hg bookmarks
     B                         9:ff43616e5d0f
     delete                    6:2702dd0c91e7
     multipledelete1           11:e46a4836065c
     multipledelete2           12:b4594d867745
     singlenode1               13:43227190fef8
     singlenode2               13:43227190fef8
  $ hg strip -B multipledelete1 -B multipledelete2
  saved backup bundle to $TESTTMP/bookmarks/.hg/strip-backup/e46a4836065c-89ec65c2-backup.hg
  bookmark 'multipledelete1' deleted
  bookmark 'multipledelete2' deleted
  $ hg id -ir e46a4836065c
  abort: unknown revision 'e46a4836065c'!
  [255]
  $ hg id -ir b4594d867745
  abort: unknown revision 'b4594d867745'!
  [255]
  $ hg strip -B singlenode1 -B singlenode2
  saved backup bundle to $TESTTMP/bookmarks/.hg/strip-backup/43227190fef8-8da858f2-backup.hg
  bookmark 'singlenode1' deleted
  bookmark 'singlenode2' deleted
  $ hg id -ir 43227190fef8
  abort: unknown revision '43227190fef8'!
  [255]
  $ hg strip -B unknownbookmark
  abort: bookmark 'unknownbookmark' not found
  [255]
  $ hg strip -B unknownbookmark1 -B unknownbookmark2
  abort: bookmark 'unknownbookmark1,unknownbookmark2' not found
  [255]
  $ hg strip -B delete -B unknownbookmark
  abort: bookmark 'unknownbookmark' not found
  [255]
  $ hg strip -B delete
  saved backup bundle to $TESTTMP/bookmarks/.hg/strip-backup/*-backup.hg (glob)
  bookmark 'delete' deleted
  $ hg id -ir 6:2702dd0c91e7
  abort: unknown revision '2702dd0c91e7'!
  [255]
  $ hg update B
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (activating bookmark B)
  $ echo a > a
  $ hg add a
  $ hg strip -B B
  abort: local changes found
  [255]
  $ hg bookmarks
   * B                         6:ff43616e5d0f

Make sure no one adds back a -b option:

  $ hg strip -b tip
  hg strip: option -b not recognized
  hg strip [-k] [-f] [-B bookmark] [-r] REV...
  
  strip changesets and all their descendants from the repository
  
  (use 'hg help -e strip' to show help for the strip extension)
  
  options ([+] can be repeated):
  
   -r --rev REV [+]           strip specified revision (optional, can specify
                              revisions without this option)
   -f --force                 force removal of changesets, discard uncommitted
                              changes (no backup)
      --no-backup             do not save backup bundle
   -k --keep                  do not modify working directory during strip
   -B --bookmark BOOKMARK [+] remove revs only reachable from given bookmark
      --mq                    operate on patch repository
  
  (use 'hg strip -h' to show more help)
  [255]

  $ cd ..

Verify bundles don't get overwritten:

  $ hg init doublebundle
  $ cd doublebundle
  $ touch a
  $ hg commit -Aqm a
  $ touch b
  $ hg commit -Aqm b
  $ hg strip -r 0
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/doublebundle/.hg/strip-backup/3903775176ed-e68910bd-backup.hg
  $ ls .hg/strip-backup
  3903775176ed-e68910bd-backup.hg
#if repobundlerepo
  $ hg pull -q -r 3903775176ed .hg/strip-backup/3903775176ed-e68910bd-backup.hg
  $ hg strip -r 0
  saved backup bundle to $TESTTMP/doublebundle/.hg/strip-backup/3903775176ed-54390173-backup.hg
  $ ls .hg/strip-backup
  3903775176ed-54390173-backup.hg
  3903775176ed-e68910bd-backup.hg
#endif
  $ cd ..

Test that we only bundle the stripped changesets (issue4736)
------------------------------------------------------------

initialization (previous repo is empty anyway)

  $ hg init issue4736
  $ cd issue4736
  $ echo a > a
  $ hg add a
  $ hg commit -m commitA
  $ echo b > b
  $ hg add b
  $ hg commit -m commitB
  $ echo c > c
  $ hg add c
  $ hg commit -m commitC
  $ hg up 'desc(commitB)'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo d > d
  $ hg add d
  $ hg commit -m commitD
  created new head
  $ hg up 'desc(commitC)'
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge 'desc(commitD)'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m 'mergeCD'
  $ hg log -G
  @    changeset:   4:d8db9d137221
  |\   tag:         tip
  | |  parent:      2:5c51d8d6557d
  | |  parent:      3:6625a5168474
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     mergeCD
  | |
  | o  changeset:   3:6625a5168474
  | |  parent:      1:eca11cf91c71
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     commitD
  | |
  o |  changeset:   2:5c51d8d6557d
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     commitC
  |
  o  changeset:   1:eca11cf91c71
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     commitB
  |
  o  changeset:   0:105141ef12d0
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     commitA
  

Check bundle behavior:

  $ hg bundle -r 'desc(mergeCD)' --base 'desc(commitC)' ../issue4736.hg
  2 changesets found
#if repobundlerepo
  $ hg log -r 'bundle()' -R ../issue4736.hg
  changeset:   3:6625a5168474
  parent:      1:eca11cf91c71
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commitD
  
  changeset:   4:d8db9d137221
  tag:         tip
  parent:      2:5c51d8d6557d
  parent:      3:6625a5168474
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     mergeCD
  
#endif

check strip behavior

  $ hg --config extensions.strip= strip 'desc(commitD)' --debug
  resolving manifests
   branchmerge: False, force: True, partial: False
   ancestor: d8db9d137221+, local: d8db9d137221+, remote: eca11cf91c71
   c: other deleted -> r
  removing c
   d: other deleted -> r
  removing d
  starting 4 threads for background file closing (?)
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  2 changesets found
  list of changesets:
  6625a516847449b6f0fa3737b9ba56e9f0f3032c
  d8db9d1372214336d2b5570f20ee468d2c72fa8b
  bundle2-output-bundle: "HG20", (1 params) 3 parts total
  bundle2-output-part: "changegroup" (params: 1 mandatory 1 advisory) streamed payload
  bundle2-output-part: "cache:rev-branch-cache" (advisory) streamed payload
  bundle2-output-part: "phase-heads" 24 bytes payload
  saved backup bundle to $TESTTMP/issue4736/.hg/strip-backup/6625a5168474-345bb43d-backup.hg
  updating the branch cache
  invalid branchheads cache (served): tip differs
  $ hg log -G
  o  changeset:   2:5c51d8d6557d
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     commitC
  |
  @  changeset:   1:eca11cf91c71
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     commitB
  |
  o  changeset:   0:105141ef12d0
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     commitA
  

strip backup content

#if repobundlerepo
  $ hg log -r 'bundle()' -R .hg/strip-backup/6625a5168474-*-backup.hg
  changeset:   3:6625a5168474
  parent:      1:eca11cf91c71
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     commitD
  
  changeset:   4:d8db9d137221
  tag:         tip
  parent:      2:5c51d8d6557d
  parent:      3:6625a5168474
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     mergeCD
  

#endif

Check that the phase cache is properly invalidated after a strip with bookmark.

  $ cat > ../stripstalephasecache.py << EOF
  > from mercurial import extensions, localrepo
  > def transactioncallback(orig, repo, desc, *args, **kwargs):
  >     def test(transaction):
  >         # observe cache inconsistency
  >         try:
  >             [repo.changelog.node(r) for r in repo.revs(b"not public()")]
  >         except IndexError:
  >             repo.ui.status(b"Index error!\n")
  >     transaction = orig(repo, desc, *args, **kwargs)
  >     # warm up the phase cache
  >     list(repo.revs(b"not public()"))
  >     if desc != b'strip':
  >          transaction.addpostclose(b"phase invalidation test", test)
  >     return transaction
  > def extsetup(ui):
  >     extensions.wrapfunction(localrepo.localrepository, b"transaction",
  >                             transactioncallback)
  > EOF
  $ hg up -C 2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo k > k
  $ hg add k
  $ hg commit -m commitK
  $ echo l > l
  $ hg add l
  $ hg commit -m commitL
  $ hg book -r tip blah
  $ hg strip ".^" --config extensions.crash=$TESTTMP/stripstalephasecache.py
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/issue4736/.hg/strip-backup/8f0b4384875c-4fa10deb-backup.hg
  $ hg up -C 1
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

Error during post-close callback of the strip transaction
(They should be gracefully handled and reported)

  $ cat > ../crashstrip.py << EOF
  > from mercurial import error
  > def reposetup(ui, repo):
  >     class crashstriprepo(repo.__class__):
  >         def transaction(self, desc, *args, **kwargs):
  >             tr = super(crashstriprepo, self).transaction(desc, *args, **kwargs)
  >             if desc == b'strip':
  >                 def crash(tra): raise error.Abort(b'boom')
  >                 tr.addpostclose(b'crash', crash)
  >             return tr
  >     repo.__class__ = crashstriprepo
  > EOF
  $ hg strip tip --config extensions.crash=$TESTTMP/crashstrip.py
  saved backup bundle to $TESTTMP/issue4736/.hg/strip-backup/5c51d8d6557d-70daef06-backup.hg
  strip failed, backup bundle stored in '$TESTTMP/issue4736/.hg/strip-backup/5c51d8d6557d-70daef06-backup.hg'
  abort: boom
  [255]

test stripping a working directory parent doesn't switch named branches

  $ hg log -G
  @  changeset:   1:eca11cf91c71
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     commitB
  |
  o  changeset:   0:105141ef12d0
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     commitA
  

  $ hg branch new-branch
  marked working directory as branch new-branch
  (branches are permanent and global, did you want a bookmark?)
  $ hg ci -m "start new branch"
  $ echo 'foo' > foo.txt
  $ hg ci -Aqm foo
  $ hg up default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo 'bar' > bar.txt
  $ hg ci -Aqm bar
  $ hg up new-branch
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg log -G
  @  changeset:   4:35358f982181
  |  tag:         tip
  |  parent:      1:eca11cf91c71
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     bar
  |
  | @  changeset:   3:f62c6c09b707
  | |  branch:      new-branch
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     foo
  | |
  | o  changeset:   2:b1d33a8cadd9
  |/   branch:      new-branch
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     start new branch
  |
  o  changeset:   1:eca11cf91c71
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     commitB
  |
  o  changeset:   0:105141ef12d0
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     commitA
  

  $ hg strip --force -r 35358f982181
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/issue4736/.hg/strip-backup/35358f982181-50d992d4-backup.hg
  $ hg log -G
  @  changeset:   3:f62c6c09b707
  |  branch:      new-branch
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     foo
  |
  o  changeset:   2:b1d33a8cadd9
  |  branch:      new-branch
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     start new branch
  |
  o  changeset:   1:eca11cf91c71
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     commitB
  |
  o  changeset:   0:105141ef12d0
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     commitA
  

  $ hg up default
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo 'bar' > bar.txt
  $ hg ci -Aqm bar
  $ hg up new-branch
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m merge
  $ hg log -G
  @    changeset:   5:4cf5e92caec2
  |\   branch:      new-branch
  | |  tag:         tip
  | |  parent:      3:f62c6c09b707
  | |  parent:      4:35358f982181
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     merge
  | |
  | o  changeset:   4:35358f982181
  | |  parent:      1:eca11cf91c71
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     bar
  | |
  o |  changeset:   3:f62c6c09b707
  | |  branch:      new-branch
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     foo
  | |
  o |  changeset:   2:b1d33a8cadd9
  |/   branch:      new-branch
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     start new branch
  |
  o  changeset:   1:eca11cf91c71
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     commitB
  |
  o  changeset:   0:105141ef12d0
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     commitA
  

  $ hg strip -r 35358f982181
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/issue4736/.hg/strip-backup/35358f982181-a6f020aa-backup.hg
  $ hg log -G
  @  changeset:   3:f62c6c09b707
  |  branch:      new-branch
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     foo
  |
  o  changeset:   2:b1d33a8cadd9
  |  branch:      new-branch
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     start new branch
  |
  o  changeset:   1:eca11cf91c71
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     commitB
  |
  o  changeset:   0:105141ef12d0
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     commitA
  

  $ hg unbundle -u $TESTTMP/issue4736/.hg/strip-backup/35358f982181-a6f020aa-backup.hg
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 1 changes to 1 files
  new changesets 35358f982181:4cf5e92caec2 (2 drafts)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg strip -k -r 35358f982181
  saved backup bundle to $TESTTMP/issue4736/.hg/strip-backup/35358f982181-a6f020aa-backup.hg
  $ hg log -G
  @  changeset:   3:f62c6c09b707
  |  branch:      new-branch
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     foo
  |
  o  changeset:   2:b1d33a8cadd9
  |  branch:      new-branch
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     start new branch
  |
  o  changeset:   1:eca11cf91c71
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     commitB
  |
  o  changeset:   0:105141ef12d0
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     commitA
  
  $ hg diff
  diff -r f62c6c09b707 bar.txt
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/bar.txt	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +bar

Use delayedstrip to strip inside a transaction

  $ cd $TESTTMP
  $ hg init delayedstrip
  $ cd delayedstrip
  $ hg debugdrawdag <<'EOS'
  >   D
  >   |
  >   C F H    # Commit on top of "I",
  >   | |/|    # Strip B+D+I+E+G+H+Z
  > I B E G
  >  \|/
  >   A   Z
  > EOS
  $ cp -R . ../scmutilcleanup

  $ hg up -C I
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo 3 >> I
  $ cat > $TESTTMP/delayedstrip.py <<EOF
  > from __future__ import absolute_import
  > from mercurial import commands, registrar, repair
  > cmdtable = {}
  > command = registrar.command(cmdtable)
  > @command(b'testdelayedstrip')
  > def testdelayedstrip(ui, repo):
  >     def getnodes(expr):
  >         return [repo.changelog.node(r) for r in repo.revs(expr)]
  >     with repo.wlock():
  >         with repo.lock():
  >             with repo.transaction(b'delayedstrip'):
  >                 repair.delayedstrip(ui, repo, getnodes(b'B+I+Z+D+E'), b'J')
  >                 repair.delayedstrip(ui, repo, getnodes(b'G+H+Z'), b'I')
  >                 commands.commit(ui, repo, message=b'J', date=b'0 0')
  > EOF
  $ hg testdelayedstrip --config extensions.t=$TESTTMP/delayedstrip.py
  warning: orphaned descendants detected, not stripping 08ebfeb61bac, 112478962961, 7fb047a69f22
  saved backup bundle to $TESTTMP/delayedstrip/.hg/strip-backup/f585351a92f8-17475721-I.hg

  $ hg log -G -T '{rev}:{node|short} {desc}' -r 'sort(all(), topo)'
  @  6:2f2d51af6205 J
  |
  o  3:08ebfeb61bac I
  |
  | o  5:64a8289d2492 F
  | |
  | o  2:7fb047a69f22 E
  |/
  | o  4:26805aba1e60 C
  | |
  | o  1:112478962961 B
  |/
  o  0:426bada5c675 A
  
Test high-level scmutil.cleanupnodes API

  $ cd $TESTTMP/scmutilcleanup
  $ hg debugdrawdag <<'EOS'
  >   D2  F2  G2   # D2, F2, G2 are replacements for D, F, G
  >   |   |   |
  >   C   H   G
  > EOS
  $ for i in B C D F G I Z; do
  >     hg bookmark -i -r $i b-$i
  > done
  $ hg bookmark -i -r E 'b-F@divergent1'
  $ hg bookmark -i -r H 'b-F@divergent2'
  $ hg bookmark -i -r G 'b-F@divergent3'
  $ cp -R . ../scmutilcleanup.obsstore

  $ cat > $TESTTMP/scmutilcleanup.py <<EOF
  > from mercurial import registrar, scmutil
  > cmdtable = {}
  > command = registrar.command(cmdtable)
  > @command(b'testnodescleanup')
  > def testnodescleanup(ui, repo):
  >     def nodes(expr):
  >         return [repo.changelog.node(r) for r in repo.revs(expr)]
  >     def node(expr):
  >         return nodes(expr)[0]
  >     with repo.wlock():
  >         with repo.lock():
  >             with repo.transaction(b'delayedstrip'):
  >                 mapping = {node(b'F'): [node(b'F2')],
  >                            node(b'D'): [node(b'D2')],
  >                            node(b'G'): [node(b'G2')]}
  >                 scmutil.cleanupnodes(repo, mapping, b'replace')
  >                 scmutil.cleanupnodes(repo, nodes(b'((B::)+I+Z)-D2-obsolete()'),
  >                                      b'replace')
  > EOF
  $ hg testnodescleanup --config extensions.t=$TESTTMP/scmutilcleanup.py
  warning: orphaned descendants detected, not stripping 112478962961, 1fc8102cda62, 26805aba1e60
  saved backup bundle to $TESTTMP/scmutilcleanup/.hg/strip-backup/f585351a92f8-73fb7c03-replace.hg

  $ hg log -G -T '{rev}:{node|short} {desc} {bookmarks}' -r 'sort(all(), topo)'
  o  8:1473d4b996d1 G2 b-F@divergent3 b-G
  |
  | o  7:d11b3456a873 F2 b-F
  | |
  | o  5:5cb05ba470a7 H
  |/|
  | o  3:7fb047a69f22 E b-F@divergent1
  | |
  | | o  6:7c78f703e465 D2 b-D
  | | |
  | | o  4:26805aba1e60 C
  | | |
  | | o  2:112478962961 B
  | |/
  o |  1:1fc8102cda62 G
   /
  o  0:426bada5c675 A b-B b-C b-I
  
  $ hg bookmark
     b-B                       0:426bada5c675
     b-C                       0:426bada5c675
     b-D                       6:7c78f703e465
     b-F                       7:d11b3456a873
     b-F@divergent1            3:7fb047a69f22
     b-F@divergent3            8:1473d4b996d1
     b-G                       8:1473d4b996d1
     b-I                       0:426bada5c675
     b-Z                       -1:000000000000

Test the above using obsstore "by the way". Not directly related to strip, but
we have reusable code here

  $ cd $TESTTMP/scmutilcleanup.obsstore
  $ cat >> .hg/hgrc <<EOF
  > [experimental]
  > evolution=true
  > evolution.track-operation=1
  > EOF

  $ hg testnodescleanup --config extensions.t=$TESTTMP/scmutilcleanup.py
  4 new orphan changesets

  $ rm .hg/localtags
  $ hg log -G -T '{rev}:{node|short} {desc} {bookmarks}' -r 'sort(all(), topo)'
  *  12:1473d4b996d1 G2 b-F@divergent3 b-G
  |
  | *  11:d11b3456a873 F2 b-F
  | |
  | *  8:5cb05ba470a7 H
  |/|
  | o  4:7fb047a69f22 E b-F@divergent1
  | |
  | | *  10:7c78f703e465 D2 b-D
  | | |
  | | x  6:26805aba1e60 C
  | | |
  | | x  3:112478962961 B
  | |/
  x |  1:1fc8102cda62 G
   /
  o  0:426bada5c675 A b-B b-C b-I
  
  $ hg debugobsolete
  1fc8102cda6204549f031015641606ccf5513ec3 1473d4b996d1d1b121de6b39fab6a04fbf9d873e 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '13', 'operation': 'replace', 'user': 'test'}
  64a8289d249234b9886244d379f15e6b650b28e3 d11b3456a873daec7c7bc53e5622e8df6d741bd2 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '13', 'operation': 'replace', 'user': 'test'}
  f585351a92f85104bff7c284233c338b10eb1df7 7c78f703e465d73102cc8780667ce269c5208a40 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'replace', 'user': 'test'}
  48b9aae0607f43ff110d84e6883c151942add5ab 0 {0000000000000000000000000000000000000000} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'replace', 'user': 'test'}
  112478962961147124edd43549aedd1a335e44bf 0 {426bada5c67598ca65036d57d9e4b64b0c1ce7a0} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'replace', 'user': 'test'}
  08ebfeb61bac6e3f12079de774d285a0d6689eba 0 {426bada5c67598ca65036d57d9e4b64b0c1ce7a0} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'replace', 'user': 'test'}
  26805aba1e600a82e93661149f2313866a221a7b 0 {112478962961147124edd43549aedd1a335e44bf} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'replace', 'user': 'test'}
  $ cd ..

Test that obsmarkers are restored even when not using generaldelta

  $ hg --config format.usegeneraldelta=no init issue5678
  $ cd issue5678
  $ cat >> .hg/hgrc <<EOF
  > [experimental]
  > evolution=true
  > EOF
  $ echo a > a
  $ hg ci -Aqm a
  $ hg ci --amend -m a2
  $ hg debugobsolete
  cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b 489bac576828490c0bb8d45eac9e5e172e4ec0a8 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '1', 'operation': 'amend', 'user': 'test'}
  $ hg strip .
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  saved backup bundle to $TESTTMP/issue5678/.hg/strip-backup/489bac576828-bef27e14-backup.hg
  $ hg unbundle -q .hg/strip-backup/*
  $ hg debugobsolete
  cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b 489bac576828490c0bb8d45eac9e5e172e4ec0a8 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '1', 'operation': 'amend', 'user': 'test'}
  $ cd ..