tests/test-strip.t

nodemap: introduce an option to use mmap to read the nodemap mapping

The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.

This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).

Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:

Before:

 * do not use the persistent nodemap
 * use the CPython implementation of the index for nodemap
 * use mmapping of the changelog index

After:

 * use the MixedIndex Rust code, with the NodeTree object for nodemap access
   (still in review)
 * use the persistent nodemap data from disk
 * access the persistent nodemap data through mmap
 * use mmapping of the changelog index

The persistent nodemap greatly speed up  most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.

Here are some numbers (in seconds) for the reference copy of mozilla-try:

Revset            Before   After     abs-change speedup

-10000:           0.004622 0.005532   0.000910  ×   0.83
-10:              0.000050 0.000132   0.000082  ×   0.37
tip               0.000052 0.000085   0.000033  ×   0.61
0 + (-10000:)     0.028222 0.005337  -0.022885  ×   5.29
0                 0.023521 0.000084  -0.023437  × 280.01
(-10000:) + 0     0.235539 0.005308  -0.230231  ×  44.37
(-10:) + :9       0.232883 0.000180  -0.232703  ×1293.79
(-10000:) + (:99) 0.238735 0.005358  -0.233377  ×  44.55
:99 + (-10000:)   0.317942 0.005593  -0.312349  ×  56.84
:9 + (-10:)       0.313372 0.000179  -0.313193  ×1750.68
:9                0.316450 0.000143  -0.316307  ×2212.93


On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.

Here are some numbers (in seconds) for the reference copy of mercurial:

Revset            Before   After     abs-change speedup
-10:              0.000065 0.000097   0.000032  × 0.67
tip               0.000063 0.000078   0.000015  × 0.80
0                 0.000561 0.000079  -0.000482  × 7.10
-10000:           0.004609 0.003648  -0.000961  × 1.26
0 + (-10000:)     0.005023 0.003715  -0.001307  × 1.35
(-10:) + :9       0.002187 0.000108  -0.002079  ×20.25
(-10000:) + 0     0.006252 0.003716  -0.002536  × 1.68
(-10000:) + (:99) 0.006367 0.003707  -0.002660  × 1.71
:9 + (-10:)       0.003846 0.000110  -0.003736  ×34.96
:9                0.003854 0.000099  -0.003755  ×38.92
:99 + (-10000:)   0.007644 0.003778  -0.003866  × 2.02

Differential Revision: https://phab.mercurial-scm.org/D7894

  $ 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 log -G -T '{rev}:{node}'
  >     hg --traceback strip $2
  >     echo % after update $1, strip $2
  >     hg log -G -T '{rev}:{node}'
  >     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
  @  4:443431ffac4f5b5a19b0b6c298a21b7ba736bcce
  |
  o  3:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |
  | o  2:264128213d290d868c54642d13aeaa3675551a78
  |/
  o  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  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
  @  3:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |
  | o  2:264128213d290d868c54642d13aeaa3675551a78
  |/
  o  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  $ teststrip 4 3
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  % before update 4, strip 3
  @  4:443431ffac4f5b5a19b0b6c298a21b7ba736bcce
  |
  o  3:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |
  | o  2:264128213d290d868c54642d13aeaa3675551a78
  |/
  o  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  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
  o  2:264128213d290d868c54642d13aeaa3675551a78
  |
  @  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  $ teststrip 1 4
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  % before update 1, strip 4
  o  4:443431ffac4f5b5a19b0b6c298a21b7ba736bcce
  |
  o  3:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |
  | o  2:264128213d290d868c54642d13aeaa3675551a78
  |/
  @  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  % after update 1, strip 4
  o  3:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |
  | o  2:264128213d290d868c54642d13aeaa3675551a78
  |/
  @  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  $ teststrip 4 2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  % before update 4, strip 2
  @  4:443431ffac4f5b5a19b0b6c298a21b7ba736bcce
  |
  o  3:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |
  | o  2:264128213d290d868c54642d13aeaa3675551a78
  |/
  o  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  % after update 4, strip 2
  @  3:443431ffac4f5b5a19b0b6c298a21b7ba736bcce
  |
  o  2:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |
  o  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  $ teststrip 4 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  % before update 4, strip 1
  @  4:264128213d290d868c54642d13aeaa3675551a78
  |
  | o  3:443431ffac4f5b5a19b0b6c298a21b7ba736bcce
  | |
  | o  2:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |/
  o  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  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
  @  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  $ teststrip null 4
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  % before update null, strip 4
  o  4:264128213d290d868c54642d13aeaa3675551a78
  |
  | o  3:443431ffac4f5b5a19b0b6c298a21b7ba736bcce
  | |
  | o  2:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |/
  o  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)
  % after update null, strip 4
  o  3:443431ffac4f5b5a19b0b6c298a21b7ba736bcce
  |
  o  2:65bd5f99a4a376cdea23a1153f07856b0d881d64
  |
  o  1:ef3a871183d7199c541cc140218298bbfcc6c28a
  |
  o  0:9ab35a2d17cb64271241ea881efcc19dd953215b
  

  $ 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
  
##strip not allowed with merge in progress
  $ hg strip 4
  abort: outstanding uncommitted merge
  (use 'hg commit' or 'hg merge --abort')
  [255]
##strip allowed --force with merge in progress
  $ hg strip 4 --force
  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

  $ hg log --graph
  @  changeset:   1:76dcf9fab855
  |  tag:         tip
  |  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
  
  $ echo c > b
  $ hg strip tip
  abort: uncommitted changes
  [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: uncommitted changes
  [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 branch 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 ..