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copytrace: move fast heuristic copytracing algorithm to core copytrace extension in fb-hgext has a heuristic implementation of copy tracing which is faster than the current copy tracing. The heuristic limits the search of copies to just files that are either: 1) Renames in the same directory 2) Moved to other directory with same name The default copytrace implementation is very slow as it finds all the new files that were added from merge base up to the head commit and for each file it checks whether it this was copied or moved version of a different file. Stash@fb did analysis for the above heuristics on the fb repo and found that among 2,443,768 moves/copies there are only 32,234 moves/copies which does not fall under the above heuristics which is approx. 0.013 of total copies. This patch moves the heuristics algorithm under config `experimental.copytrace=heuristics`. While moving fbext to core, this patch removes couple of less useful config options named `sourcecommitlimit` and `maxmovescandidatestocheck`. Tests are also added for the heuristics algorithm, which are basically copied from fbext/tests/test-copytrace.t. The tests follow a pattern creating a server repo and then cloning to a local repo to create public and draft changesets, the distinction which will be useful in upcoming patches. After this patch `experimental.copytrace` has the following behaviour: 1) `off`: turns off copytracing 2) `heuristics`: use the heuristic algorithm added in this patch. 3) everything else: use the full copytracing algorithm .. feature:: A new fast heuristic algorithm for copytracing which assumes that the files moves are either:: 1) Renames in the same directory 2) Moves in other directories with same names You can use this algorithm by setting `experimental.copytrace=heuristics`. Differential Revision: https://phab.mercurial-scm.org/D623
author Pulkit Goyal <7895pulkit@gmail.com>
date Sun, 03 Sep 2017 03:49:15 +0530
parents 15ec3119d500
children ecc96506c49d
line wrap: on
line source

==========================
Test rebase with obsolete
==========================

Enable obsolete

  $ cat >> $HGRCPATH << EOF
  > [ui]
  > logtemplate= {rev}:{node|short} {desc|firstline}
  > [experimental]
  > stabilization=createmarkers,allowunstable
  > [phases]
  > publish=False
  > [extensions]
  > rebase=
  > drawdag=$TESTDIR/drawdag.py
  > EOF

Setup rebase canonical repo

  $ hg init base
  $ cd base
  $ hg unbundle "$TESTDIR/bundles/rebase.hg"
  adding changesets
  adding manifests
  adding file changes
  added 8 changesets with 7 changes to 7 files (+2 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg up tip
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg log -G
  @  7:02de42196ebe H
  |
  | o  6:eea13746799a G
  |/|
  o |  5:24b6387c8c8c F
  | |
  | o  4:9520eea781bc E
  |/
  | o  3:32af7686d403 D
  | |
  | o  2:5fddd98957c8 C
  | |
  | o  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  
  $ cd ..

simple rebase
---------------------------------

  $ hg clone base simple
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd simple
  $ hg up 32af7686d403
  3 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg rebase -d eea13746799a
  rebasing 1:42ccdea3bb16 "B"
  rebasing 2:5fddd98957c8 "C"
  rebasing 3:32af7686d403 "D"
  $ hg log -G
  @  10:8eeb3c33ad33 D
  |
  o  9:2327fea05063 C
  |
  o  8:e4e5be0395b2 B
  |
  | o  7:02de42196ebe H
  | |
  o |  6:eea13746799a G
  |\|
  | o  5:24b6387c8c8c F
  | |
  o |  4:9520eea781bc E
  |/
  o  0:cd010b8cd998 A
  
  $ hg log --hidden -G
  @  10:8eeb3c33ad33 D
  |
  o  9:2327fea05063 C
  |
  o  8:e4e5be0395b2 B
  |
  | o  7:02de42196ebe H
  | |
  o |  6:eea13746799a G
  |\|
  | o  5:24b6387c8c8c F
  | |
  o |  4:9520eea781bc E
  |/
  | x  3:32af7686d403 D
  | |
  | x  2:5fddd98957c8 C
  | |
  | x  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  
  $ hg debugobsolete
  42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 e4e5be0395b2cbd471ed22a26b1b6a1a0658a794 0 (*) {'user': 'test'} (glob)
  5fddd98957c8a54a4d436dfe1da9d87f21a1b97b 2327fea05063f39961b14cb69435a9898dc9a245 0 (*) {'user': 'test'} (glob)
  32af7686d403cf45b5d95f2d70cebea587ac806a 8eeb3c33ad33d452c89e5dcf611c347f978fb42b 0 (*) {'user': 'test'} (glob)


  $ cd ..

empty changeset
---------------------------------

  $ hg clone base empty
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd empty
  $ hg up eea13746799a
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

We make a copy of both the first changeset in the rebased and some other in the
set.

  $ hg graft 42ccdea3bb16 32af7686d403
  grafting 1:42ccdea3bb16 "B"
  grafting 3:32af7686d403 "D"
  $ hg rebase  -s 42ccdea3bb16 -d .
  rebasing 1:42ccdea3bb16 "B"
  note: rebase of 1:42ccdea3bb16 created no changes to commit
  rebasing 2:5fddd98957c8 "C"
  rebasing 3:32af7686d403 "D"
  note: rebase of 3:32af7686d403 created no changes to commit
  $ hg log -G
  o  10:5ae4c968c6ac C
  |
  @  9:08483444fef9 D
  |
  o  8:8877864f1edb B
  |
  | o  7:02de42196ebe H
  | |
  o |  6:eea13746799a G
  |\|
  | o  5:24b6387c8c8c F
  | |
  o |  4:9520eea781bc E
  |/
  o  0:cd010b8cd998 A
  
  $ hg log --hidden -G
  o  10:5ae4c968c6ac C
  |
  @  9:08483444fef9 D
  |
  o  8:8877864f1edb B
  |
  | o  7:02de42196ebe H
  | |
  o |  6:eea13746799a G
  |\|
  | o  5:24b6387c8c8c F
  | |
  o |  4:9520eea781bc E
  |/
  | x  3:32af7686d403 D
  | |
  | x  2:5fddd98957c8 C
  | |
  | x  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  
  $ hg debugobsolete
  42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 0 {cd010b8cd998f3981a5a8115f94f8da4ab506089} (*) {'user': 'test'} (glob)
  5fddd98957c8a54a4d436dfe1da9d87f21a1b97b 5ae4c968c6aca831df823664e706c9d4aa34473d 0 (*) {'user': 'test'} (glob)
  32af7686d403cf45b5d95f2d70cebea587ac806a 0 {5fddd98957c8a54a4d436dfe1da9d87f21a1b97b} (*) {'user': 'test'} (glob)


More complex case where part of the rebase set were already rebased

  $ hg rebase --rev 'desc(D)' --dest 'desc(H)'
  rebasing 9:08483444fef9 "D"
  $ hg debugobsolete
  42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 0 {cd010b8cd998f3981a5a8115f94f8da4ab506089} (*) {'user': 'test'} (glob)
  5fddd98957c8a54a4d436dfe1da9d87f21a1b97b 5ae4c968c6aca831df823664e706c9d4aa34473d 0 (*) {'user': 'test'} (glob)
  32af7686d403cf45b5d95f2d70cebea587ac806a 0 {5fddd98957c8a54a4d436dfe1da9d87f21a1b97b} (*) {'user': 'test'} (glob)
  08483444fef91d6224f6655ee586a65d263ad34c 4596109a6a4328c398bde3a4a3b6737cfade3003 0 (*) {'user': 'test'} (glob)
  $ hg log -G
  @  11:4596109a6a43 D
  |
  | o  10:5ae4c968c6ac C
  | |
  | x  9:08483444fef9 D
  | |
  | o  8:8877864f1edb B
  | |
  o |  7:02de42196ebe H
  | |
  | o  6:eea13746799a G
  |/|
  o |  5:24b6387c8c8c F
  | |
  | o  4:9520eea781bc E
  |/
  o  0:cd010b8cd998 A
  
  $ hg rebase --source 'desc(B)' --dest 'tip' --config experimental.rebaseskipobsolete=True
  rebasing 8:8877864f1edb "B"
  note: not rebasing 9:08483444fef9 "D", already in destination as 11:4596109a6a43 "D" (tip)
  rebasing 10:5ae4c968c6ac "C"
  $ hg debugobsolete
  42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 0 {cd010b8cd998f3981a5a8115f94f8da4ab506089} (*) {'user': 'test'} (glob)
  5fddd98957c8a54a4d436dfe1da9d87f21a1b97b 5ae4c968c6aca831df823664e706c9d4aa34473d 0 (*) {'user': 'test'} (glob)
  32af7686d403cf45b5d95f2d70cebea587ac806a 0 {5fddd98957c8a54a4d436dfe1da9d87f21a1b97b} (*) {'user': 'test'} (glob)
  08483444fef91d6224f6655ee586a65d263ad34c 4596109a6a4328c398bde3a4a3b6737cfade3003 0 (*) {'user': 'test'} (glob)
  8877864f1edb05d0e07dc4ba77b67a80a7b86672 462a34d07e599b87ea08676a449373fe4e2e1347 0 (*) {'user': 'test'} (glob)
  5ae4c968c6aca831df823664e706c9d4aa34473d 98f6af4ee9539e14da4465128f894c274900b6e5 0 (*) {'user': 'test'} (glob)
  $ hg log --rev 'contentdivergent()'
  $ hg log -G
  o  13:98f6af4ee953 C
  |
  o  12:462a34d07e59 B
  |
  @  11:4596109a6a43 D
  |
  o  7:02de42196ebe H
  |
  | o  6:eea13746799a G
  |/|
  o |  5:24b6387c8c8c F
  | |
  | o  4:9520eea781bc E
  |/
  o  0:cd010b8cd998 A
  
  $ hg log --style default --debug -r 4596109a6a4328c398bde3a4a3b6737cfade3003
  changeset:   11:4596109a6a4328c398bde3a4a3b6737cfade3003
  phase:       draft
  parent:      7:02de42196ebee42ef284b6780a87cdc96e8eaab6
  parent:      -1:0000000000000000000000000000000000000000
  manifest:    11:a91006e3a02f1edf631f7018e6e5684cf27dd905
  user:        Nicolas Dumazet <nicdumz.commits@gmail.com>
  date:        Sat Apr 30 15:24:48 2011 +0200
  files+:      D
  extra:       branch=default
  extra:       rebase_source=08483444fef91d6224f6655ee586a65d263ad34c
  extra:       source=32af7686d403cf45b5d95f2d70cebea587ac806a
  description:
  D
  
  
  $ hg up -qr 'desc(G)'
  $ hg graft 4596109a6a4328c398bde3a4a3b6737cfade3003
  grafting 11:4596109a6a43 "D"
  $ hg up -qr 'desc(E)'
  $ hg rebase -s tip -d .
  rebasing 14:9e36056a46e3 "D" (tip)
  $ hg log --style default --debug -r tip
  changeset:   15:627d4614809036ba22b9e7cb31638ddc06ab99ab
  tag:         tip
  phase:       draft
  parent:      4:9520eea781bcca16c1e15acc0ba14335a0e8e5ba
  parent:      -1:0000000000000000000000000000000000000000
  manifest:    15:648e8ede73ae3e497d093d3a4c8fcc2daa864f42
  user:        Nicolas Dumazet <nicdumz.commits@gmail.com>
  date:        Sat Apr 30 15:24:48 2011 +0200
  files+:      D
  extra:       branch=default
  extra:       intermediate-source=4596109a6a4328c398bde3a4a3b6737cfade3003
  extra:       rebase_source=9e36056a46e37c9776168c7375734eebc70e294f
  extra:       source=32af7686d403cf45b5d95f2d70cebea587ac806a
  description:
  D
  
  
Start rebase from a commit that is obsolete but not hidden only because it's
a working copy parent. We should be moved back to the starting commit as usual
even though it is hidden (until we're moved there).

  $ hg --hidden up -qr 'first(hidden())'
  $ hg rebase --rev 13 --dest 15
  rebasing 13:98f6af4ee953 "C"
  $ hg log -G
  o  16:294a2b93eb4d C
  |
  o  15:627d46148090 D
  |
  | o  12:462a34d07e59 B
  | |
  | o  11:4596109a6a43 D
  | |
  | o  7:02de42196ebe H
  | |
  +---o  6:eea13746799a G
  | |/
  | o  5:24b6387c8c8c F
  | |
  o |  4:9520eea781bc E
  |/
  | @  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  

  $ cd ..

collapse rebase
---------------------------------

  $ hg clone base collapse
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd collapse
  $ hg rebase  -s 42ccdea3bb16 -d eea13746799a --collapse
  rebasing 1:42ccdea3bb16 "B"
  rebasing 2:5fddd98957c8 "C"
  rebasing 3:32af7686d403 "D"
  $ hg log -G
  o  8:4dc2197e807b Collapsed revision
  |
  | @  7:02de42196ebe H
  | |
  o |  6:eea13746799a G
  |\|
  | o  5:24b6387c8c8c F
  | |
  o |  4:9520eea781bc E
  |/
  o  0:cd010b8cd998 A
  
  $ hg log --hidden -G
  o  8:4dc2197e807b Collapsed revision
  |
  | @  7:02de42196ebe H
  | |
  o |  6:eea13746799a G
  |\|
  | o  5:24b6387c8c8c F
  | |
  o |  4:9520eea781bc E
  |/
  | x  3:32af7686d403 D
  | |
  | x  2:5fddd98957c8 C
  | |
  | x  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  
  $ hg id --debug -r tip
  4dc2197e807bae9817f09905b50ab288be2dbbcf tip
  $ hg debugobsolete
  42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 4dc2197e807bae9817f09905b50ab288be2dbbcf 0 (*) {'user': 'test'} (glob)
  5fddd98957c8a54a4d436dfe1da9d87f21a1b97b 4dc2197e807bae9817f09905b50ab288be2dbbcf 0 (*) {'user': 'test'} (glob)
  32af7686d403cf45b5d95f2d70cebea587ac806a 4dc2197e807bae9817f09905b50ab288be2dbbcf 0 (*) {'user': 'test'} (glob)

  $ cd ..

Rebase set has hidden descendants
---------------------------------

We rebase a changeset which has a hidden changeset. The hidden changeset must
not be rebased.

  $ hg clone base hidden
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd hidden
  $ hg rebase -s 5fddd98957c8 -d eea13746799a
  rebasing 2:5fddd98957c8 "C"
  rebasing 3:32af7686d403 "D"
  $ hg rebase -s 42ccdea3bb16 -d 02de42196ebe
  rebasing 1:42ccdea3bb16 "B"
  $ hg log -G
  o  10:7c6027df6a99 B
  |
  | o  9:cf44d2f5a9f4 D
  | |
  | o  8:e273c5e7d2d2 C
  | |
  @ |  7:02de42196ebe H
  | |
  | o  6:eea13746799a G
  |/|
  o |  5:24b6387c8c8c F
  | |
  | o  4:9520eea781bc E
  |/
  o  0:cd010b8cd998 A
  
  $ hg log --hidden -G
  o  10:7c6027df6a99 B
  |
  | o  9:cf44d2f5a9f4 D
  | |
  | o  8:e273c5e7d2d2 C
  | |
  @ |  7:02de42196ebe H
  | |
  | o  6:eea13746799a G
  |/|
  o |  5:24b6387c8c8c F
  | |
  | o  4:9520eea781bc E
  |/
  | x  3:32af7686d403 D
  | |
  | x  2:5fddd98957c8 C
  | |
  | x  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  
  $ hg debugobsolete
  5fddd98957c8a54a4d436dfe1da9d87f21a1b97b e273c5e7d2d29df783dce9f9eaa3ac4adc69c15d 0 (*) {'user': 'test'} (glob)
  32af7686d403cf45b5d95f2d70cebea587ac806a cf44d2f5a9f4297a62be94cbdd3dff7c7dc54258 0 (*) {'user': 'test'} (glob)
  42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 7c6027df6a99d93f461868e5433f63bde20b6dfb 0 (*) {'user': 'test'} (glob)

Test that rewriting leaving instability behind is allowed
---------------------------------------------------------------------

  $ hg log -r 'children(8)'
  9:cf44d2f5a9f4 D (no-eol)
  $ hg rebase -r 8
  rebasing 8:e273c5e7d2d2 "C"
  $ hg log -G
  o  11:0d8f238b634c C
  |
  o  10:7c6027df6a99 B
  |
  | o  9:cf44d2f5a9f4 D
  | |
  | x  8:e273c5e7d2d2 C
  | |
  @ |  7:02de42196ebe H
  | |
  | o  6:eea13746799a G
  |/|
  o |  5:24b6387c8c8c F
  | |
  | o  4:9520eea781bc E
  |/
  o  0:cd010b8cd998 A
  


Test multiple root handling
------------------------------------

  $ hg rebase --dest 4 --rev '7+11+9'
  rebasing 9:cf44d2f5a9f4 "D"
  rebasing 7:02de42196ebe "H"
  rebasing 11:0d8f238b634c "C" (tip)
  $ hg log -G
  o  14:1e8370e38cca C
  |
  @  13:bfe264faf697 H
  |
  | o  12:102b4c1d889b D
  |/
  | o  10:7c6027df6a99 B
  | |
  | x  7:02de42196ebe H
  | |
  +---o  6:eea13746799a G
  | |/
  | o  5:24b6387c8c8c F
  | |
  o |  4:9520eea781bc E
  |/
  o  0:cd010b8cd998 A
  
  $ cd ..

Detach both parents

  $ hg init double-detach
  $ cd double-detach

  $ hg debugdrawdag <<EOF
  >   F
  >  /|
  > C E
  > | |
  > B D G
  >  \|/
  >   A
  > EOF

  $ hg rebase -d G -r 'B + D + F'
  rebasing 1:112478962961 "B" (B)
  rebasing 2:b18e25de2cf5 "D" (D)
  rebasing 6:f15c3adaf214 "F" (F tip)
  abort: cannot rebase 6:f15c3adaf214 without moving at least one of its parents
  [255]

  $ cd ..

test on rebase dropping a merge

(setup)

  $ hg init dropmerge
  $ cd dropmerge
  $ hg unbundle "$TESTDIR/bundles/rebase.hg"
  adding changesets
  adding manifests
  adding file changes
  added 8 changesets with 7 changes to 7 files (+2 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg up 3
  4 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg merge 7
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m 'M'
  $ echo I > I
  $ hg add I
  $ hg ci -m I
  $ hg log -G
  @  9:4bde274eefcf I
  |
  o    8:53a6a128b2b7 M
  |\
  | o  7:02de42196ebe H
  | |
  | | o  6:eea13746799a G
  | |/|
  | o |  5:24b6387c8c8c F
  | | |
  | | o  4:9520eea781bc E
  | |/
  o |  3:32af7686d403 D
  | |
  o |  2:5fddd98957c8 C
  | |
  o |  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  
(actual test)

  $ hg rebase --dest 6 --rev '((desc(H) + desc(D))::) - desc(M)'
  rebasing 3:32af7686d403 "D"
  rebasing 7:02de42196ebe "H"
  rebasing 9:4bde274eefcf "I" (tip)
  $ hg log -G
  @  12:acd174b7ab39 I
  |
  o  11:6c11a6218c97 H
  |
  | o  10:b5313c85b22e D
  |/
  | o    8:53a6a128b2b7 M
  | |\
  | | x  7:02de42196ebe H
  | | |
  o---+  6:eea13746799a G
  | | |
  | | o  5:24b6387c8c8c F
  | | |
  o---+  4:9520eea781bc E
   / /
  x |  3:32af7686d403 D
  | |
  o |  2:5fddd98957c8 C
  | |
  o |  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  

Test hidden changesets in the rebase set (issue4504)

  $ hg up --hidden 9
  3 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo J > J
  $ hg add J
  $ hg commit -m J
  $ hg debugobsolete `hg log --rev . -T '{node}'`
  obsoleted 1 changesets

  $ hg rebase --rev .~1::. --dest 'max(desc(D))' --traceback --config experimental.rebaseskipobsolete=off
  rebasing 9:4bde274eefcf "I"
  rebasing 13:06edfc82198f "J" (tip)
  $ hg log -G
  @  15:5ae8a643467b J
  |
  o  14:9ad579b4a5de I
  |
  | o  12:acd174b7ab39 I
  | |
  | o  11:6c11a6218c97 H
  | |
  o |  10:b5313c85b22e D
  |/
  | o    8:53a6a128b2b7 M
  | |\
  | | x  7:02de42196ebe H
  | | |
  o---+  6:eea13746799a G
  | | |
  | | o  5:24b6387c8c8c F
  | | |
  o---+  4:9520eea781bc E
   / /
  x |  3:32af7686d403 D
  | |
  o |  2:5fddd98957c8 C
  | |
  o |  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  
  $ hg up 14 -C
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo "K" > K
  $ hg add K
  $ hg commit --amend -m "K"
  $ echo "L" > L
  $ hg add L
  $ hg commit -m "L"
  $ hg up '.^'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo "M" > M
  $ hg add M
  $ hg commit --amend -m "M"
  $ hg log -G
  @  18:bfaedf8eb73b M
  |
  | o  17:97219452e4bd L
  | |
  | x  16:fc37a630c901 K
  |/
  | o  15:5ae8a643467b J
  | |
  | x  14:9ad579b4a5de I
  |/
  | o  12:acd174b7ab39 I
  | |
  | o  11:6c11a6218c97 H
  | |
  o |  10:b5313c85b22e D
  |/
  | o    8:53a6a128b2b7 M
  | |\
  | | x  7:02de42196ebe H
  | | |
  o---+  6:eea13746799a G
  | | |
  | | o  5:24b6387c8c8c F
  | | |
  o---+  4:9520eea781bc E
   / /
  x |  3:32af7686d403 D
  | |
  o |  2:5fddd98957c8 C
  | |
  o |  1:42ccdea3bb16 B
  |/
  o  0:cd010b8cd998 A
  
  $ hg rebase -s 14 -d 17 --config experimental.rebaseskipobsolete=True
  note: not rebasing 14:9ad579b4a5de "I", already in destination as 16:fc37a630c901 "K"
  rebasing 15:5ae8a643467b "J"

  $ cd ..

Skip obsolete changeset even with multiple hops
-----------------------------------------------

setup

  $ hg init obsskip
  $ cd obsskip
  $ cat << EOF >> .hg/hgrc
  > [experimental]
  > rebaseskipobsolete = True
  > [extensions]
  > strip =
  > EOF
  $ echo A > A
  $ hg add A
  $ hg commit -m A
  $ echo B > B
  $ hg add B
  $ hg commit -m B0
  $ hg commit --amend -m B1
  $ hg commit --amend -m B2
  $ hg up --hidden 'desc(B0)'
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo C > C
  $ hg add C
  $ hg commit -m C

Rebase finds its way in a chain of marker

  $ hg rebase -d 'desc(B2)'
  note: not rebasing 1:a8b11f55fb19 "B0", already in destination as 3:261e70097290 "B2"
  rebasing 4:212cb178bcbb "C" (tip)

Even when the chain include missing node

  $ hg up --hidden 'desc(B0)'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo D > D
  $ hg add D
  $ hg commit -m D
  $ hg --hidden strip -r 'desc(B1)'
  saved backup bundle to $TESTTMP/obsskip/.hg/strip-backup/86f6414ccda7-b1c452ee-backup.hg (glob)

  $ hg rebase -d 'desc(B2)'
  note: not rebasing 1:a8b11f55fb19 "B0", already in destination as 2:261e70097290 "B2"
  rebasing 5:1a79b7535141 "D" (tip)
  $ hg up 4
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo "O" > O
  $ hg add O
  $ hg commit -m O
  $ echo "P" > P
  $ hg add P
  $ hg commit -m P
  $ hg log -G
  @  8:8d47583e023f P
  |
  o  7:360bbaa7d3ce O
  |
  | o  6:9c48361117de D
  | |
  o |  4:ff2c4d47b71d C
  |/
  o  2:261e70097290 B2
  |
  o  0:4a2df7238c3b A
  
  $ hg debugobsolete `hg log -r 7 -T '{node}\n'` --config experimental.stabilization=all
  obsoleted 1 changesets
  $ hg rebase -d 6 -r "4::"
  rebasing 4:ff2c4d47b71d "C"
  note: not rebasing 7:360bbaa7d3ce "O", it has no successor
  rebasing 8:8d47583e023f "P" (tip)

If all the changeset to be rebased are obsolete and present in the destination, we
should display a friendly error message

  $ hg log -G
  @  10:121d9e3bc4c6 P
  |
  o  9:4be60e099a77 C
  |
  o  6:9c48361117de D
  |
  o  2:261e70097290 B2
  |
  o  0:4a2df7238c3b A
  

  $ hg up 9
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo "non-relevant change" > nonrelevant
  $ hg add nonrelevant
  $ hg commit -m nonrelevant
  created new head
  $ hg debugobsolete `hg log -r 11 -T '{node}\n'` --config experimental.stabilization=all
  obsoleted 1 changesets
  $ hg rebase -r . -d 10
  note: not rebasing 11:f44da1f4954c "nonrelevant" (tip), it has no successor

If a rebase is going to create divergence, it should abort

  $ hg log -G
  @  10:121d9e3bc4c6 P
  |
  o  9:4be60e099a77 C
  |
  o  6:9c48361117de D
  |
  o  2:261e70097290 B2
  |
  o  0:4a2df7238c3b A
  

  $ hg up 9
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo "john" > doe
  $ hg add doe
  $ hg commit -m "john doe"
  created new head
  $ hg up 10
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo "foo" > bar
  $ hg add bar
  $ hg commit --amend -m "10'"
  $ hg up 10 --hidden
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo "bar" > foo
  $ hg add foo
  $ hg commit -m "bar foo"
  $ hg log -G
  @  14:73568ab6879d bar foo
  |
  | o  13:77d874d096a2 10'
  | |
  | | o  12:3eb461388009 john doe
  | |/
  x |  10:121d9e3bc4c6 P
  |/
  o  9:4be60e099a77 C
  |
  o  6:9c48361117de D
  |
  o  2:261e70097290 B2
  |
  o  0:4a2df7238c3b A
  
  $ hg summary
  parent: 14:73568ab6879d tip (orphan)
   bar foo
  branch: default
  commit: (clean)
  update: 2 new changesets, 3 branch heads (merge)
  phases: 8 draft
  orphan: 1 changesets
  $ hg rebase -s 10 -d 12
  abort: this rebase will cause divergences from: 121d9e3bc4c6
  (to force the rebase please set experimental.allowdivergence=True)
  [255]
  $ hg log -G
  @  14:73568ab6879d bar foo
  |
  | o  13:77d874d096a2 10'
  | |
  | | o  12:3eb461388009 john doe
  | |/
  x |  10:121d9e3bc4c6 P
  |/
  o  9:4be60e099a77 C
  |
  o  6:9c48361117de D
  |
  o  2:261e70097290 B2
  |
  o  0:4a2df7238c3b A
  
With experimental.allowdivergence=True, rebase can create divergence

  $ hg rebase -s 10 -d 12 --config experimental.allowdivergence=True
  rebasing 10:121d9e3bc4c6 "P"
  rebasing 14:73568ab6879d "bar foo" (tip)
  $ hg summary
  parent: 16:61bd55f69bc4 tip
   bar foo
  branch: default
  commit: (clean)
  update: 1 new changesets, 2 branch heads (merge)
  phases: 8 draft
  content-divergent: 2 changesets

rebase --continue + skipped rev because their successors are in destination
we make a change in trunk and work on conflicting changes to make rebase abort.

  $ hg log -G -r 16::
  @  16:61bd55f69bc4 bar foo
  |
  ~

Create the two changes in trunk
  $ printf "a" > willconflict
  $ hg add willconflict
  $ hg commit -m "willconflict first version"

  $ printf "dummy" > C
  $ hg commit -m "dummy change successor"

Create the changes that we will rebase
  $ hg update -C 16 -q
  $ printf "b" > willconflict
  $ hg add willconflict
  $ hg commit -m "willconflict second version"
  created new head
  $ printf "dummy" > K
  $ hg add K
  $ hg commit -m "dummy change"
  $ printf "dummy" > L
  $ hg add L
  $ hg commit -m "dummy change"
  $ hg debugobsolete `hg log -r ".^" -T '{node}'` `hg log -r 18 -T '{node}'` --config experimental.stabilization=all
  obsoleted 1 changesets

  $ hg log -G -r 16::
  @  21:7bdc8a87673d dummy change
  |
  x  20:8b31da3c4919 dummy change
  |
  o  19:b82fb57ea638 willconflict second version
  |
  | o  18:601db7a18f51 dummy change successor
  | |
  | o  17:357ddf1602d5 willconflict first version
  |/
  o  16:61bd55f69bc4 bar foo
  |
  ~
  $ hg rebase -r ".^^ + .^ + ." -d 18
  rebasing 19:b82fb57ea638 "willconflict second version"
  merging willconflict
  warning: conflicts while merging willconflict! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see hg resolve, then hg rebase --continue)
  [1]

  $ hg resolve --mark willconflict
  (no more unresolved files)
  continue: hg rebase --continue
  $ hg rebase --continue
  rebasing 19:b82fb57ea638 "willconflict second version"
  note: not rebasing 20:8b31da3c4919 "dummy change", already in destination as 18:601db7a18f51 "dummy change successor"
  rebasing 21:7bdc8a87673d "dummy change" (tip)
  $ cd ..

Rebase merge where successor of one parent is equal to destination (issue5198)

  $ hg init p1-succ-is-dest
  $ cd p1-succ-is-dest

  $ hg debugdrawdag <<EOF
  >   F
  >  /|
  > E D B # replace: D -> B
  >  \|/
  >   A
  > EOF

  $ hg rebase -d B -s D
  note: not rebasing 2:b18e25de2cf5 "D" (D), already in destination as 1:112478962961 "B" (B)
  rebasing 4:66f1a38021c9 "F" (F tip)
  $ hg log -G
  o    5:50e9d60b99c6 F
  |\
  | | x  4:66f1a38021c9 F
  | |/|
  | o |  3:7fb047a69f22 E
  | | |
  | | x  2:b18e25de2cf5 D
  | |/
  o |  1:112478962961 B
  |/
  o  0:426bada5c675 A
  
  $ cd ..

Rebase merge where successor of other parent is equal to destination

  $ hg init p2-succ-is-dest
  $ cd p2-succ-is-dest

  $ hg debugdrawdag <<EOF
  >   F
  >  /|
  > E D B # replace: E -> B
  >  \|/
  >   A
  > EOF

  $ hg rebase -d B -s E
  note: not rebasing 3:7fb047a69f22 "E" (E), already in destination as 1:112478962961 "B" (B)
  rebasing 4:66f1a38021c9 "F" (F tip)
  $ hg log -G
  o    5:aae1787dacee F
  |\
  | | x  4:66f1a38021c9 F
  | |/|
  | | x  3:7fb047a69f22 E
  | | |
  | o |  2:b18e25de2cf5 D
  | |/
  o /  1:112478962961 B
  |/
  o  0:426bada5c675 A
  
  $ cd ..

Rebase merge where successor of one parent is ancestor of destination

  $ hg init p1-succ-in-dest
  $ cd p1-succ-in-dest

  $ hg debugdrawdag <<EOF
  >   F C
  >  /| |
  > E D B # replace: D -> B
  >  \|/
  >   A
  > EOF

  $ hg rebase -d C -s D
  note: not rebasing 2:b18e25de2cf5 "D" (D), already in destination as 1:112478962961 "B" (B)
  rebasing 5:66f1a38021c9 "F" (F tip)

  $ hg log -G
  o    6:0913febf6439 F
  |\
  +---x  5:66f1a38021c9 F
  | | |
  | o |  4:26805aba1e60 C
  | | |
  o | |  3:7fb047a69f22 E
  | | |
  +---x  2:b18e25de2cf5 D
  | |
  | o  1:112478962961 B
  |/
  o  0:426bada5c675 A
  
  $ cd ..

Rebase merge where successor of other parent is ancestor of destination

  $ hg init p2-succ-in-dest
  $ cd p2-succ-in-dest

  $ hg debugdrawdag <<EOF
  >   F C
  >  /| |
  > E D B # replace: E -> B
  >  \|/
  >   A
  > EOF

  $ hg rebase -d C -s E
  note: not rebasing 3:7fb047a69f22 "E" (E), already in destination as 1:112478962961 "B" (B)
  rebasing 5:66f1a38021c9 "F" (F tip)
  $ hg log -G
  o    6:c6ab0cc6d220 F
  |\
  +---x  5:66f1a38021c9 F
  | | |
  | o |  4:26805aba1e60 C
  | | |
  | | x  3:7fb047a69f22 E
  | | |
  o---+  2:b18e25de2cf5 D
   / /
  o /  1:112478962961 B
  |/
  o  0:426bada5c675 A
  
  $ cd ..

Rebase merge where successor of one parent is ancestor of destination

  $ hg init p1-succ-in-dest-b
  $ cd p1-succ-in-dest-b

  $ hg debugdrawdag <<EOF
  >   F C
  >  /| |
  > E D B # replace: E -> B
  >  \|/
  >   A
  > EOF

  $ hg rebase -d C -b F
  rebasing 2:b18e25de2cf5 "D" (D)
  note: not rebasing 3:7fb047a69f22 "E" (E), already in destination as 1:112478962961 "B" (B)
  rebasing 5:66f1a38021c9 "F" (F tip)
  note: rebase of 5:66f1a38021c9 created no changes to commit
  $ hg log -G
  o  6:8f47515dda15 D
  |
  | x    5:66f1a38021c9 F
  | |\
  o | |  4:26805aba1e60 C
  | | |
  | | x  3:7fb047a69f22 E
  | | |
  | x |  2:b18e25de2cf5 D
  | |/
  o /  1:112478962961 B
  |/
  o  0:426bada5c675 A
  
  $ cd ..

Rebase merge where successor of other parent is ancestor of destination

  $ hg init p2-succ-in-dest-b
  $ cd p2-succ-in-dest-b

  $ hg debugdrawdag <<EOF
  >   F C
  >  /| |
  > E D B # replace: D -> B
  >  \|/
  >   A
  > EOF

  $ hg rebase -d C -b F
  note: not rebasing 2:b18e25de2cf5 "D" (D), already in destination as 1:112478962961 "B" (B)
  rebasing 3:7fb047a69f22 "E" (E)
  rebasing 5:66f1a38021c9 "F" (F tip)
  note: rebase of 5:66f1a38021c9 created no changes to commit

  $ hg log -G
  o  6:533690786a86 E
  |
  | x    5:66f1a38021c9 F
  | |\
  o | |  4:26805aba1e60 C
  | | |
  | | x  3:7fb047a69f22 E
  | | |
  | x |  2:b18e25de2cf5 D
  | |/
  o /  1:112478962961 B
  |/
  o  0:426bada5c675 A
  
  $ cd ..

Rebase merge where both parents have successors in destination

  $ hg init p12-succ-in-dest
  $ cd p12-succ-in-dest
  $ hg debugdrawdag <<'EOS'
  >   E   F
  >  /|  /|  # replace: A -> C
  > A B C D  # replace: B -> D
  > | |
  > X Y
  > EOS
  $ hg rebase -r A+B+E -d F
  note: not rebasing 4:a3d17304151f "A" (A), already in destination as 0:96cc3511f894 "C" (C)
  note: not rebasing 5:b23a2cc00842 "B" (B), already in destination as 1:058c1e1fb10a "D" (D)
  rebasing 7:dac5d11c5a7d "E" (E tip)
  abort: rebasing 7:dac5d11c5a7d will include unwanted changes from 3:59c792af609c, 5:b23a2cc00842 or 2:ba2b7fa7166d, 4:a3d17304151f
  [255]
  $ cd ..

Rebase a non-clean merge. One parent has successor in destination, the other
parent moves as requested.

  $ hg init p1-succ-p2-move
  $ cd p1-succ-p2-move
  $ hg debugdrawdag <<'EOS'
  >   D Z
  >  /| | # replace: A -> C
  > A B C # D/D = D
  > EOS
  $ hg rebase -r A+B+D -d Z
  note: not rebasing 0:426bada5c675 "A" (A), already in destination as 2:96cc3511f894 "C" (C)
  rebasing 1:fc2b737bb2e5 "B" (B)
  rebasing 3:b8ed089c80ad "D" (D)

  $ rm .hg/localtags
  $ hg log -G
  o  6:e4f78693cc88 D
  |
  o  5:76840d832e98 B
  |
  o  4:50e41c1f3950 Z
  |
  o  2:96cc3511f894 C
  
  $ hg files -r tip
  B
  C
  D
  Z

  $ cd ..

  $ hg init p1-move-p2-succ
  $ cd p1-move-p2-succ
  $ hg debugdrawdag <<'EOS'
  >   D Z
  >  /| |  # replace: B -> C
  > A B C  # D/D = D
  > EOS
  $ hg rebase -r B+A+D -d Z
  rebasing 0:426bada5c675 "A" (A)
  note: not rebasing 1:fc2b737bb2e5 "B" (B), already in destination as 2:96cc3511f894 "C" (C)
  rebasing 3:b8ed089c80ad "D" (D)

  $ rm .hg/localtags
  $ hg log -G
  o  6:1b355ed94d82 D
  |
  o  5:a81a74d764a6 A
  |
  o  4:50e41c1f3950 Z
  |
  o  2:96cc3511f894 C
  
  $ hg files -r tip
  A
  C
  D
  Z

  $ cd ..

Test that bookmark is moved and working dir is updated when all changesets have
equivalents in destination
  $ hg init rbsrepo && cd rbsrepo
  $ echo "[experimental]" > .hg/hgrc
  $ echo "stabilization=all" >> .hg/hgrc
  $ echo "rebaseskipobsolete=on" >> .hg/hgrc
  $ echo root > root && hg ci -Am root
  adding root
  $ echo a > a && hg ci -Am a
  adding a
  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo b > b && hg ci -Am b
  adding b
  created new head
  $ hg rebase -r 2 -d 1
  rebasing 2:1e9a3c00cbe9 "b" (tip)
  $ hg log -r .  # working dir is at rev 3 (successor of 2)
  3:be1832deae9a b (no-eol)
  $ hg book -r 2 mybook --hidden  # rev 2 has a bookmark on it now
  $ hg up 2 && hg log -r .  # working dir is at rev 2 again
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  2:1e9a3c00cbe9 b (no-eol)
  $ hg rebase -r 2 -d 3 --config experimental.stabilization.track-operation=1
  note: not rebasing 2:1e9a3c00cbe9 "b" (mybook), already in destination as 3:be1832deae9a "b" (tip)
Check that working directory and bookmark was updated to rev 3 although rev 2
was skipped
  $ hg log -r .
  3:be1832deae9a b (no-eol)
  $ hg bookmarks
     mybook                    3:be1832deae9a
  $ hg debugobsolete --rev tip
  1e9a3c00cbe90d236ac05ef61efcc5e40b7412bc be1832deae9ac531caa7438b8dcf6055a122cd8e 0 (*) {'user': 'test'} (glob)

Obsoleted working parent and bookmark could be moved if an ancestor of working
parent gets moved:

  $ hg init $TESTTMP/ancestor-wd-move
  $ cd $TESTTMP/ancestor-wd-move
  $ hg debugdrawdag <<'EOS'
  >  E D1  # rebase: D1 -> D2
  >  | |
  >  | C
  > D2 |
  >  | B
  >  |/
  >  A
  > EOS
  $ hg update D1 -q
  $ hg bookmark book -i
  $ hg rebase -r B+D1 -d E
  rebasing 1:112478962961 "B" (B)
  note: not rebasing 5:15ecf15e0114 "D1" (D1 tip book), already in destination as 2:0807738e0be9 "D2" (D2)
  $ hg log -G -T '{desc} {bookmarks}'
  @  B book
  |
  | x  D1
  | |
  o |  E
  | |
  | o  C
  | |
  o |  D2
  | |
  | x  B
  |/
  o  A
  
Rebasing a merge with one of its parent having a hidden successor

  $ hg init $TESTTMP/merge-p1-hidden-successor
  $ cd $TESTTMP/merge-p1-hidden-successor

  $ hg debugdrawdag <<'EOS'
  >  E
  >  |
  > B3 B2 # amend: B1 -> B2 -> B3
  >  |/   # B2 is hidden
  >  |  D
  >  |  |\
  >  | B1 C
  >  |/
  >  A
  > EOS

  $ eval `hg tags -T '{tag}={node}\n'`
  $ rm .hg/localtags

  $ hg rebase -r $D -d $E
  rebasing 5:9e62094e4d94 "D"

  $ hg log -G
  o    7:a699d059adcf D
  |\
  | o  6:ecc93090a95c E
  | |
  | o  4:0dc878468a23 B3
  | |
  o |  1:96cc3511f894 C
   /
  o  0:426bada5c675 A
  
For some reasons (--hidden, rebaseskipobsolete=0, directaccess, etc.),
rebasestate may contain hidden hashes. "rebase --abort" should work regardless.

  $ hg init $TESTTMP/hidden-state1
  $ cd $TESTTMP/hidden-state1
  $ cat >> .hg/hgrc <<EOF
  > [experimental]
  > rebaseskipobsolete=0
  > EOF

  $ hg debugdrawdag <<'EOS'
  >    C
  >    |
  >  D B # prune: B, C
  >  |/  # B/D=B
  >  A
  > EOS

  $ eval `hg tags -T '{tag}={node}\n'`
  $ rm .hg/localtags

  $ hg update -q $C --hidden
  $ hg rebase -s $B -d $D
  rebasing 1:2ec65233581b "B"
  merging D
  warning: conflicts while merging D! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see hg resolve, then hg rebase --continue)
  [1]

  $ cp -R . $TESTTMP/hidden-state2

  $ hg log -G
  @  2:b18e25de2cf5 D
  |
  | @  1:2ec65233581b B
  |/
  o  0:426bada5c675 A
  
  $ hg summary
  parent: 2:b18e25de2cf5 tip
   D
  parent: 1:2ec65233581b  (obsolete)
   B
  branch: default
  commit: 2 modified, 1 unknown, 1 unresolved (merge)
  update: (current)
  phases: 3 draft
  rebase: 0 rebased, 2 remaining (rebase --continue)

  $ hg rebase --abort
  rebase aborted

Also test --continue for the above case

  $ cd $TESTTMP/hidden-state2
  $ hg resolve -m
  (no more unresolved files)
  continue: hg rebase --continue
  $ hg rebase --continue
  rebasing 1:2ec65233581b "B"
  rebasing 3:7829726be4dc "C" (tip)
  $ hg log -G
  @  5:1964d5d5b547 C
  |
  o  4:68deb90c12a2 B
  |
  o  2:b18e25de2cf5 D
  |
  o  0:426bada5c675 A