view tests/test-graft.t @ 49777:e1953a34c110

bundle: emit full snapshot as is, without doing a redelta

With the new `forced` delta-reused policy, it become important to be able to
send full snapshot where full snapshot are needed. Otherwise, the fallback delta
will simply be used on the client side… creating monstrous delta chain, since
revision that are meant as a reset of delta-chain chain becoming too complex are
simply adding a new full delta-tree on the leaf of another one.

In the `non-forced` cases, client process full snapshot from the bundle
differently from deltas, so client will still try to convert the full snapshot
into a delta if possible. So this will no lead to pathological storage
explosion.

I have considered making this configurable, but the impact seems limited enough
that it does not seems to be worth it. Especially with the current
sparse-revlog format that use "delta-tree" with multiple level snapshots, full
snapshot are much less frequent and not that different from other intermediate
snapshot that we are already sending over the wire anyway.

CPU wise, this will help the bundling side a little as it will not need to
reconstruct revisions and compute deltas. The unbundling side might save a tiny
amount of CPU as it won't need to reconstruct the delta-base to reconstruct the
revision full text. This only slightly visible in some of the benchmarks. And
have no real impact on most of them.

### data-env-vars.name      = pypy-2018-08-01-zstd-sparse-revlog
  # benchmark.name          = perf-bundle
  # benchmark.variants.revs = last-40000
before:          11.467186 seconds
just-emit-full:  11.190576 seconds   (-2.41%)
with-pull-force: 11.041091 seconds   (-3.72%)
  # benchmark.name          = perf-unbundle
  # benchmark.variants.revs = last-40000
before:     16.744862
just-emit-full:: 16.561036 seconds   (-1.10%)
with-pull-force: 16.389344 seconds   (-2.12%)
  # benchmark.name          = pull
  # benchmark.variants.revs = last-40000
before:     26.870569
just-emit-full:  26.391188 seconds   (-1.78%)
with-pull-force: 25.633184 seconds   (-4.60%)


Space wise (so network-wise) the impact is fairly small. When taking compression into
account.

Below are tests the size of `hg bundle --all` for a handful of benchmark repositories
(with bzip, zstd compression and without it)

This show a small increase in the bundle size, but nothing really significant
except maybe for mozilla-try (+12%) that nobody really pulls large chunk of anyway.
Mozilla-try is also the repository that benefit the most for not having to
recompute deltas client size.

### mercurial:
bzip-before:     26 406 342 bytes
bzip-after:      26 691 543 bytes  +1.08%

zstd-before:     27 918 645 bytes
zstd-after:      28 075 896 bytes  +0.56%

none-before:     98 675 601 bytes
none-after:     100 411 237 bytes  +1.76%


### pypy
bzip-before:    201 295 752 bytes
bzip-after:     209 780 282 bytes  +4.21%

zstd-before:    202 974 795 bytes
zstd-after:     205 165 780 bytes  +1.08%

none-before:    871 070 261 bytes
none-after:     993 595 057 bytes +14.07%


### netbeans
bzip-before:    601 314 330 bytes
bzip-after:     614 246 241 bytes  +2.15%

zstd-before:    604 745 136 bytes
zstd-after:     615 497 705 bytes  +1.78%

none-before:  3 338 238 571 bytes
none-after:   3 439 422 535 bytes  +3.03%


### mozilla-central
bzip-before:  1 493 006 921 bytes
bzip-after:   1 549 650 570 bytes  +3.79%

zstd-before:  1 481 910 102 bytes
zstd-after:   1 513 052 415 bytes  +2.10%

none-before:  6 535 929 910 bytes
none-after:   7 010 191 342 bytes  +7.26%


### mozilla-try
bzip-before:  6 583 425 999 bytes
bzip-after:   7 423 536 928 bytes +12.76%

zstd-before:  6 021 009 212 bytes
zstd-after:   6 674 922 420 bytes +10.86%

none-before: 22 954 739 558 bytes
none-after:  26 013 854 771 bytes +13.32%

  $ cat >> $HGRCPATH <<EOF
  > [extdiff]
  > # for portability:
  > pdiff = sh "$RUNTESTDIR/pdiff"
  > EOF

Create a repo with some stuff in it:

  $ hg init a
  $ cd a
  $ echo a > a
  $ echo a > d
  $ echo a > e
  $ hg ci -qAm0
  $ echo b > a
  $ hg ci -m1 -u bar
  $ hg mv a b
  $ hg ci -m2
  $ hg cp b c
  $ hg ci -m3 -u baz
  $ echo b > d
  $ echo f > e
  $ hg ci -m4
  $ hg up -q 3
  $ echo b > e
  $ hg branch -q stable
  $ hg ci -m5
  $ hg merge -q default --tool internal:local # for conflicts in e, choose 5 and ignore 4
  $ hg branch -q default
  $ hg ci -m6
  $ hg phase --public 3
  $ hg phase --force --secret 6

  $ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
  @    [e-mail]: 6
  |\
  | o  [e-mail]: 5
  | |
  o |  [e-mail]: 4
  |/
  o  [e-mail]: 3
  |
  o  [e-mail]: 2
  |
  o  [e-mail]: 1
  |
  o  [e-mail]: 0
  
Test --base for grafting the merge of 4 from the perspective of 5, thus only getting the change to d

  $ hg up -cqr 3
  $ hg graft -r 6 --base 5
  grafting 6:25a2b029d3ae "6" (tip)
  merging e
  $ hg st --change .
  M d

  $ hg -q strip . --config extensions.strip=

Test --base for collapsing changesets 2 and 3, thus getting both b and c

  $ hg up -cqr 0
  $ hg graft -r 3 --base 1
  grafting 3:4c60f11aa304 "3"
  merging a and b to b
  merging a and c to c
  $ hg st --change .
  A b
  A c
  R a

  $ hg -q strip . --config extensions.strip=

Specifying child as --base revision fails safely (perhaps slightly confusing, but consistent)

  $ hg graft -r 2 --base 3
  grafting 2:5c095ad7e90f "2"
  note: possible conflict - c was deleted and renamed to:
   a
  note: graft of 2:5c095ad7e90f created no changes to commit

Can't continue without starting:

  $ hg -q up -cr tip
  $ hg rm -q e
  $ hg graft --continue
  abort: no graft in progress
  [20]
  $ hg revert -r . -q e

Need to specify a rev:

  $ hg graft
  abort: no revisions specified
  [10]

Can't graft ancestor:

  $ hg graft 1 2
  skipping ancestor revision 1:5d205f8b35b6
  skipping ancestor revision 2:5c095ad7e90f
  [255]

Specify revisions with -r:

  $ hg graft -r 1 -r 2
  skipping ancestor revision 1:5d205f8b35b6
  skipping ancestor revision 2:5c095ad7e90f
  [255]

  $ hg graft -r 1 2
  warning: inconsistent use of --rev might give unexpected revision ordering!
  skipping ancestor revision 2:5c095ad7e90f
  skipping ancestor revision 1:5d205f8b35b6
  [255]

Conflicting date/user options:

  $ hg up -q 0
  $ hg graft -U --user foo 2
  abort: cannot specify both --user and --currentuser
  [10]
  $ hg graft -D --date '0 0' 2
  abort: cannot specify both --date and --currentdate
  [10]

Can't graft with dirty wd:

  $ hg up -q 0
  $ echo foo > a
  $ hg graft 1
  abort: uncommitted changes
  [20]
  $ hg revert a

Graft a rename:
(this also tests that editor is invoked if '--edit' is specified)

  $ hg status --rev "2^1" --rev 2
  A b
  R a
  $ HGEDITOR=cat hg graft 2 -u foo --edit
  grafting 2:5c095ad7e90f "2"
  merging a and b to b
  2
  
  
  HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  HG: Leave message empty to abort commit.
  HG: --
  HG: user: foo
  HG: branch 'default'
  HG: added b
  HG: removed a
  $ hg export tip --git
  # HG changeset patch
  # User foo
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID ef0ef43d49e79e81ddafdc7997401ba0041efc82
  # Parent  68795b066622ca79a25816a662041d8f78f3cd9e
  2
  
  diff --git a/a b/b
  rename from a
  rename to b

Look for extra:source

  $ hg log --debug -r tip
  changeset:   7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
  tag:         tip
  phase:       draft
  parent:      0:68795b066622ca79a25816a662041d8f78f3cd9e
  parent:      -1:0000000000000000000000000000000000000000
  manifest:    7:e59b6b228f9cbf9903d5e9abf996e083a1f533eb
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  files+:      b
  files-:      a
  extra:       branch=default
  extra:       source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
  description:
  2
  
  

Graft out of order, skipping a merge and a duplicate
(this also tests that editor is not invoked if '--edit' is not specified)

  $ hg graft 1 5 4 3 'merge()' 2 -n
  skipping ungraftable merge revision 6
  skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
  grafting 1:5d205f8b35b6 "1"
  grafting 5:97f8bfe72746 "5"
  grafting 4:9c233e8e184d "4"
  grafting 3:4c60f11aa304 "3"

  $ HGEDITOR=cat hg graft 1 5 'merge()' 2 --debug
  skipping ungraftable merge revision 6
  scanning for duplicate grafts
  skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
  grafting 1:5d205f8b35b6 "1"
    unmatched files in local:
     b
    all copies found (* = to merge, ! = divergent, % = renamed and deleted):
     on local side:
      src: 'a' -> dst: 'b' *
    checking for directory renames
  resolving manifests
   branchmerge: True, force: True, partial: False
   ancestor: 68795b066622, local: ef0ef43d49e7+, remote: 5d205f8b35b6
  starting 4 threads for background file closing (?)
   preserving b for resolve of b
   b: local copied/moved from a -> m
  picked tool ':merge' for b (binary False symlink False changedelete False)
  merging b and a to b
  my b@ef0ef43d49e7+ other a@5d205f8b35b6 ancestor a@68795b066622
   premerge successful
  committing files:
  b
  committing manifest
  committing changelog
  updating the branch cache
  grafting 5:97f8bfe72746 "5"
  resolving manifests
   branchmerge: True, force: True, partial: False
   ancestor: 4c60f11aa304, local: 6b9e5368ca4e+, remote: 97f8bfe72746
   e: remote is newer -> g
  getting e
  committing files:
  e
  committing manifest
  committing changelog
  updating the branch cache
  $ HGEDITOR=cat hg graft 4 3 --log --debug
  scanning for duplicate grafts
  grafting 4:9c233e8e184d "4"
  resolving manifests
   branchmerge: True, force: True, partial: False
   ancestor: 4c60f11aa304, local: 1905859650ec+, remote: 9c233e8e184d
   d: remote is newer -> g
  getting d
   preserving e for resolve of e
   e: versions differ -> m
  picked tool ':merge' for e (binary False symlink False changedelete False)
  merging e
  my e@1905859650ec+ other e@9c233e8e184d ancestor e@4c60f11aa304
  warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
  abort: unresolved conflicts, can't continue
  (use 'hg resolve' and 'hg graft --continue')
  [1]

Summary should mention graft:

  $ hg summary |grep graft
  commit: 2 modified, 2 unknown, 1 unresolved (graft in progress)

Using status to get more context

  $ hg status --verbose
  M d
  M e
  ? a.orig
  ? e.orig
  # The repository is in an unfinished *graft* state.
  
  # Unresolved merge conflicts:
  # 
  #     e
  # 
  # To mark files as resolved:  hg resolve --mark FILE
  
  # To continue:    hg graft --continue
  # To abort:       hg graft --abort
  # To stop:        hg graft --stop
  

Commit while interrupted should fail:

  $ hg ci -m 'commit interrupted graft'
  abort: graft in progress
  (use 'hg graft --continue' or 'hg graft --stop' to stop)
  [20]

Abort the graft and try committing:

  $ hg up -C .
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo c >> e
  $ hg ci -mtest

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

Graft again:

  $ hg graft 1 5 4 3 'merge()' 2
  skipping ungraftable merge revision 6
  skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
  skipping revision 1:5d205f8b35b6 (already grafted to 8:6b9e5368ca4e)
  skipping revision 5:97f8bfe72746 (already grafted to 9:1905859650ec)
  grafting 4:9c233e8e184d "4"
  merging e
  warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
  abort: unresolved conflicts, can't continue
  (use 'hg resolve' and 'hg graft --continue')
  [1]

Continue without resolve should fail:

  $ hg graft -c
  grafting 4:9c233e8e184d "4"
  abort: unresolved merge conflicts (see 'hg help resolve')
  [20]

Fix up:

  $ echo b > e
  $ hg resolve -m e
  (no more unresolved files)
  continue: hg graft --continue

Continue with a revision should fail:

  $ hg graft -c 6
  abort: can't specify --continue and revisions
  [10]

  $ hg graft -c -r 6
  abort: can't specify --continue and revisions
  [10]

Continue for real, clobber usernames

  $ hg graft -c -U
  grafting 4:9c233e8e184d "4"
  grafting 3:4c60f11aa304 "3"

Compare with original:

  $ hg diff -r 6
  $ hg status --rev 0:. -C
  M d
  M e
  A b
    a
  A c
    a
  R a

View graph:

  $ hg log -G --template '{author}@{rev}.{phase}: {desc}\n'
  @  [e-mail]: 3
  |
  o  [e-mail]: 4
  |
  o  [e-mail]: 5
  |
  o  [e-mail]: 1
  |
  o  [e-mail]: 2
  |
  | o    [e-mail]: 6
  | |\
  | | o  [e-mail]: 5
  | | |
  | o |  [e-mail]: 4
  | |/
  | o  [e-mail]: 3
  | |
  | o  [e-mail]: 2
  | |
  | o  [e-mail]: 1
  |/
  o  [e-mail]: 0
  
Graft again onto another branch should preserve the original source
  $ hg up -q 0
  $ echo 'g'>g
  $ hg add g
  $ hg ci -m 7
  created new head
  $ hg graft 7
  grafting 7:ef0ef43d49e7 "2"

  $ hg log -r 7 --template '{rev}:{node}\n'
  7:ef0ef43d49e79e81ddafdc7997401ba0041efc82
  $ hg log -r 2 --template '{rev}:{node}\n'
  2:5c095ad7e90f871700f02dd1fa5012cb4498a2d4

  $ hg log --debug -r tip
  changeset:   13:7a4785234d87ec1aa420ed6b11afe40fa73e12a9
  tag:         tip
  phase:       draft
  parent:      12:b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
  parent:      -1:0000000000000000000000000000000000000000
  manifest:    13:dc313617b8c32457c0d589e0dbbedfe71f3cd637
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  files+:      b
  files-:      a
  extra:       branch=default
  extra:       intermediate-source=ef0ef43d49e79e81ddafdc7997401ba0041efc82
  extra:       source=5c095ad7e90f871700f02dd1fa5012cb4498a2d4
  description:
  2
  
  
Disallow grafting an already grafted cset onto its original branch
  $ hg up -q 6
  $ hg graft 7
  skipping already grafted revision 7:ef0ef43d49e7 (was grafted from 2:5c095ad7e90f)
  [255]

  $ hg pdiff --config extensions.extdiff= --patch -r 2 -r 13
  --- */hg-5c095ad7e90f.patch	* (glob)
  +++ */hg-7a4785234d87.patch	* (glob)
  @@ -1,18 +1,18 @@
   # HG changeset patch
  -# User test
  +# User foo
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
  -# Node ID 5c095ad7e90f871700f02dd1fa5012cb4498a2d4
  -# Parent  5d205f8b35b66bc36375c9534ffd3237730e8f04
  +# Node ID 7a4785234d87ec1aa420ed6b11afe40fa73e12a9
  +# Parent  b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
   2
   
  -diff -r 5d205f8b35b6 -r 5c095ad7e90f a
  +diff -r b592ea63bb0c -r 7a4785234d87 a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
   +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
   @@ -1,1 +0,0 @@
  --b
  -diff -r 5d205f8b35b6 -r 5c095ad7e90f b
  +-a
  +diff -r b592ea63bb0c -r 7a4785234d87 b
   --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   +++ b/b	Thu Jan 01 00:00:00 1970 +0000
   @@ -0,0 +1,1 @@
  -+b
  ++a
  [1]

  $ hg pdiff --config extensions.extdiff= --patch -r 2 -r 13 -X .
  --- */hg-5c095ad7e90f.patch	* (glob)
  +++ */hg-7a4785234d87.patch	* (glob)
  @@ -1,8 +1,8 @@
   # HG changeset patch
  -# User test
  +# User foo
   # Date 0 0
   #      Thu Jan 01 00:00:00 1970 +0000
  -# Node ID 5c095ad7e90f871700f02dd1fa5012cb4498a2d4
  -# Parent  5d205f8b35b66bc36375c9534ffd3237730e8f04
  +# Node ID 7a4785234d87ec1aa420ed6b11afe40fa73e12a9
  +# Parent  b592ea63bb0c19a6c5c44685ee29a2284f9f1b8f
   2
   
  [1]

Disallow grafting already grafted csets with the same origin onto each other
  $ hg up -q 13
  $ hg graft 2
  skipping revision 2:5c095ad7e90f (already grafted to 13:7a4785234d87)
  [255]
  $ hg graft 7
  skipping already grafted revision 7:ef0ef43d49e7 (13:7a4785234d87 also has origin 2:5c095ad7e90f)
  [255]

  $ hg up -q 7
  $ hg graft 2
  skipping revision 2:5c095ad7e90f (already grafted to 7:ef0ef43d49e7)
  [255]
  $ hg graft tip
  skipping already grafted revision 13:7a4785234d87 (7:ef0ef43d49e7 also has origin 2:5c095ad7e90f)
  [255]

Graft with --log

  $ hg up -Cq 1
  $ hg graft 3 --log -u foo
  grafting 3:4c60f11aa304 "3"
  $ hg log --template '{rev}:{node|short} {parents} {desc}\n' -r tip
  14:0c921c65ef1e 1:5d205f8b35b6  3
  (grafted from 4c60f11aa304a54ae1c199feb94e7fc771e51ed8)

Resolve conflicted graft
  $ hg up -q 0
  $ echo b > a
  $ hg ci -m 8
  created new head
  $ echo c > a
  $ hg ci -m 9
  $ hg graft 1 --tool internal:fail
  grafting 1:5d205f8b35b6 "1"
  abort: unresolved conflicts, can't continue
  (use 'hg resolve' and 'hg graft --continue')
  [1]
  $ hg resolve --all
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  [1]
  $ cat a
  <<<<<<< local: aaa4406d4f0a - test: 9
  c
  =======
  b
  >>>>>>> graft: 5d205f8b35b6 - bar: 1
  $ echo b > a
  $ hg resolve -m a
  (no more unresolved files)
  continue: hg graft --continue
  $ hg graft -c
  grafting 1:5d205f8b35b6 "1"
  $ hg export tip --git
  # HG changeset patch
  # User bar
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID f67661df0c4804d301f064f332b57e7d5ddaf2be
  # Parent  aaa4406d4f0ae9befd6e58c82ec63706460cbca6
  1
  
  diff --git a/a b/a
  --- a/a
  +++ b/a
  @@ -1,1 +1,1 @@
  -c
  +b

Resolve conflicted graft with rename
  $ echo c > a
  $ hg ci -m 10
  $ hg graft 2 --tool internal:fail
  grafting 2:5c095ad7e90f "2"
  abort: unresolved conflicts, can't continue
  (use 'hg resolve' and 'hg graft --continue')
  [1]
  $ hg resolve --all
  merging a and b to b
  (no more unresolved files)
  continue: hg graft --continue
  $ hg graft -c
  grafting 2:5c095ad7e90f "2"
  $ hg export tip --git
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 9627f653b421c61fc1ea4c4e366745070fa3d2bc
  # Parent  ee295f490a40b97f3d18dd4c4f1c8936c233b612
  2
  
  diff --git a/a b/b
  rename from a
  rename to b

Test simple origin(), with and without args
  $ hg log -r 'origin()'
  changeset:   1:5d205f8b35b6
  user:        bar
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  
  changeset:   2:5c095ad7e90f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   3:4c60f11aa304
  user:        baz
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     3
  
  changeset:   4:9c233e8e184d
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     4
  
  changeset:   5:97f8bfe72746
  branch:      stable
  parent:      3:4c60f11aa304
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     5
  
  $ hg log -r 'origin(7)'
  changeset:   2:5c095ad7e90f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
Now transplant a graft to test following through copies
  $ hg up -q 0
  $ hg branch -q dev
  $ hg ci -qm "dev branch"
  $ hg --config extensions.transplant= transplant -q 7
  $ hg log -r 'origin(.)'
  changeset:   2:5c095ad7e90f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
Test that the graft and transplant markers in extra are converted, allowing
origin() to still work.  Note that these recheck the immediately preceeding two
tests.
  $ hg --quiet --config extensions.convert= --config convert.hg.saverev=True convert . ../converted

The graft case
  $ hg -R ../converted log -r 7 --template "{rev}: {node}\n{join(extras, '\n')}\n"
  7: 7ae846e9111fc8f57745634250c7b9ac0a60689b
  branch=default
  convert_revision=ef0ef43d49e79e81ddafdc7997401ba0041efc82
  source=e0213322b2c1a5d5d236c74e79666441bee67a7d
  $ hg -R ../converted log -r 'origin(7)'
  changeset:   2:e0213322b2c1
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
Test that template correctly expands more than one 'extra' (issue4362), and that
'intermediate-source' is converted.
  $ hg -R ../converted log -r 13 --template "{extras % ' Extra: {extra}\n'}"
   Extra: branch=default
   Extra: convert_revision=7a4785234d87ec1aa420ed6b11afe40fa73e12a9
   Extra: intermediate-source=7ae846e9111fc8f57745634250c7b9ac0a60689b
   Extra: source=e0213322b2c1a5d5d236c74e79666441bee67a7d

The transplant case
  $ hg -R ../converted log -r tip --template "{rev}: {node}\n{join(extras, '\n')}\n"
  21: fbb6c5cc81002f2b4b49c9d731404688bcae5ade
  branch=dev
  convert_revision=7e61b508e709a11d28194a5359bc3532d910af21
  transplant_source=z\xe8F\xe9\x11\x1f\xc8\xf5wEcBP\xc7\xb9\xac\n`h\x9b
  $ hg -R ../converted log -r 'origin(tip)'
  changeset:   2:e0213322b2c1
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  

Test simple destination
  $ hg log -r 'destination()'
  changeset:   7:ef0ef43d49e7
  parent:      0:68795b066622
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   8:6b9e5368ca4e
  user:        bar
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  
  changeset:   9:1905859650ec
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     5
  
  changeset:   10:52dc0b4c6907
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     4
  
  changeset:   11:882b35362a6b
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     3
  
  changeset:   13:7a4785234d87
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   14:0c921c65ef1e
  parent:      1:5d205f8b35b6
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     3
  
  changeset:   17:f67661df0c48
  user:        bar
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     1
  
  changeset:   19:9627f653b421
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   21:7e61b508e709
  branch:      dev
  tag:         tip
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  $ hg log -r 'destination(2)'
  changeset:   7:ef0ef43d49e7
  parent:      0:68795b066622
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   13:7a4785234d87
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   19:9627f653b421
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   21:7e61b508e709
  branch:      dev
  tag:         tip
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
Transplants of grafts can find a destination...
  $ hg log -r 'destination(7)'
  changeset:   21:7e61b508e709
  branch:      dev
  tag:         tip
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
... grafts of grafts unfortunately can't
  $ hg graft -q 13 --debug
  scanning for duplicate grafts
  grafting 13:7a4785234d87 "2"
    all copies found (* = to merge, ! = divergent, % = renamed and deleted):
     on local side:
      src: 'a' -> dst: 'b' *
     on remote side:
      src: 'a' -> dst: 'b' *
    checking for directory renames
  resolving manifests
   branchmerge: True, force: True, partial: False
   ancestor: b592ea63bb0c, local: 7e61b508e709+, remote: 7a4785234d87
  starting 4 threads for background file closing (?)
  nothing to commit, clearing merge state
  note: graft of 13:7a4785234d87 created no changes to commit
  $ hg log -r 'destination(13)'
All copies of a cset
  $ hg log -r 'origin(13) or destination(origin(13))'
  changeset:   2:5c095ad7e90f
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   7:ef0ef43d49e7
  parent:      0:68795b066622
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   13:7a4785234d87
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   19:9627f653b421
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  
  changeset:   21:7e61b508e709
  branch:      dev
  tag:         tip
  user:        foo
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     2
  

graft skips ancestors

  $ hg graft 21 3
  skipping ancestor revision 21:7e61b508e709
  grafting 3:4c60f11aa304 "3"
  merging b and c to c

graft with --force (still doesn't graft merges)

  $ hg graft 19 0 6
  skipping ungraftable merge revision 6
  skipping ancestor revision 0:68795b066622
  grafting 19:9627f653b421 "2"
  merging b
  note: graft of 19:9627f653b421 created no changes to commit
  $ hg graft 19 0 6 --force
  skipping ungraftable merge revision 6
  grafting 19:9627f653b421 "2"
  merging b
  note: graft of 19:9627f653b421 created no changes to commit
  grafting 0:68795b066622 "0"

graft --force after backout. Do the backout with graft too, to make
sure we support issue6248.

  $ echo abc > a
  $ hg ci -m 24
  $ hg graft --base . -r ".^" --no-commit
  grafting 23:b1cac6de36a9 "0"
  $ hg commit -m 'Backed out changeset 2e7ea477be26'
  $ hg graft 24
  skipping ancestor revision 24:2e7ea477be26
  [255]
  $ hg graft 24 --force
  grafting 24:2e7ea477be26 "24"
  merging a
  $ cat a
  abc

graft --continue after --force

  $ echo def > a
  $ hg ci -m 27
  $ hg graft 24 --force --tool internal:fail
  grafting 24:2e7ea477be26 "24"
  abort: unresolved conflicts, can't continue
  (use 'hg resolve' and 'hg graft --continue')
  [1]
  $ hg resolve --all
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  [1]
  $ echo abc > a
  $ hg resolve -m a
  (no more unresolved files)
  continue: hg graft --continue
  $ hg graft -c
  grafting 24:2e7ea477be26 "24"
  $ cat a
  abc

graft --continue after --base with conflits

  $ echo base > d
  $ hg ci -m _
  $ hg graft -r 6
  skipping ungraftable merge revision 6
  [255]
  $ hg graft -r 6 --base 5
  grafting 6:25a2b029d3ae "6"
  merging d
  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
  merging e
  abort: unresolved conflicts, can't continue
  (use 'hg resolve' and 'hg graft --continue')
  [1]
  $ echo a > d && hg resolve -qm
  continue: hg graft --continue
  $ hg graft --continue
  grafting 6:25a2b029d3ae "6"

Continue testing same origin policy, using revision numbers from test above
but do some destructive editing of the repo:

  $ hg up -qC 7
  $ hg tag -l -r 13 tmp
  $ hg --config extensions.strip= strip 2
  saved backup bundle to $TESTTMP/a/.hg/strip-backup/5c095ad7e90f-d323a1e4-backup.hg
  $ hg graft tmp
  skipping already grafted revision 8:7a4785234d87 (2:ef0ef43d49e7 also has unknown origin 5c095ad7e90f)
  [255]

Empty graft

  $ hg up -qr 22
  $ hg tag -f something
  $ hg graft -qr 23
  $ hg graft -f 23
  grafting 23:72d9c7c75bcc "24"
  note: graft of 23:72d9c7c75bcc created no changes to commit

  $ cd ..

Graft to duplicate a commit

  $ hg init graftsibling
  $ cd graftsibling
  $ touch a
  $ hg commit -qAm a
  $ touch b
  $ hg commit -qAm b
  $ hg log -G -T '{rev}\n'
  @  1
  |
  o  0
  
  $ hg up -q 0
  $ hg graft -r 1
  grafting 1:0e067c57feba "b" (tip)
  $ hg log -G -T '{rev}\n'
  @  2
  |
  | o  1
  |/
  o  0
  
Graft to duplicate a commit twice

  $ hg up -q 0
  $ hg graft -r 2
  grafting 2:044ec77f6389 "b" (tip)
  $ hg log -G -T '{rev}\n'
  @  3
  |
  | o  2
  |/
  | o  1
  |/
  o  0