annotate tests/test-evolve-content-divergent-basic.t @ 5619:5673730db8d5 stable

evolve: clean merge state when content divergence resolution has no changes

This patch backs out b723805d7fe1, which only hid the problem.

Usually mergestate is cleared (or should be cleared) when creating a new
changeset, but sometimes there are situations when there's nothing to commit.

When solving content divergence resulted in no changes and no new changesets
were created, mergestate was left untouched. That's a problem because sometimes
mergestate contains files with conflicts that were already resolved by user,
and such mergestate only applies to the current wdir parent. Since evolve has
already dealt with the current wdir parent successfully when it reached this
code, this is a good place to clean the mergestate.

=======================================================
Tests the resolution of content divergence: basic cases
=======================================================

This file intend to cover basic case of content divergence. See the other test
file for more advanced cases.

  $ cat >> $HGRCPATH <<EOF
  > [alias]
  > glog = log -GT "{rev}:{node|short} {desc|firstline}\n ({bookmarks}) [{branch}] {phase}"
  > [defaults]
  > amend=-d "0 0"
  > fold=-d "0 0"
  > [web]
  > push_ssl = false
  > allow_push = *
  > [phases]
  > publish = False
  > [diff]
  > git = 1
  > unified = 0
  > [ui]
  > logtemplate = {rev}:{node|short}@{branch}({phase}) {desc|firstline} [{instabilities}]\n
  > [experimental]
  > evolution.allowdivergence = True
  > [extensions]
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH
  $ mkcommit() {
  >    echo "$1" > "$1"
  >    hg add "$1"
  >    hg ci -m "add $1"
  > }

  $ mkcommits() {
  >   for i in $@; do mkcommit $i ; done
  > }

Basic test of divergence: two divergent changesets with the same parents
With --all --any we dedupe the divergent and solve the divergence once

  $ hg init test1
  $ cd test1
  $ echo a > a
  $ hg ci -Aqm "added a"
  $ echo b > b
  $ hg ci -Aqm "added b"
  $ hg export
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 5f6d8a4bf34ab274ccc9f631c2536964b8a3666d
  # Parent  9092f1db7931481f93b37d5c9fbcfc341bcd7318
  added b
  
  diff --git a/b b/b
  new file mode 100644
  --- /dev/null
  +++ b/b
  @@ -0,0 +1,1 @@
  +b

  $ hg up .^
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo bdivergent > bdivergent1
  $ hg ci -Am "divergent"
  adding bdivergent1
  created new head
  $ hg export
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 593c57f2117e33dd0884382f02789d948f548557
  # Parent  9092f1db7931481f93b37d5c9fbcfc341bcd7318
  divergent
  
  diff --git a/bdivergent1 b/bdivergent1
  new file mode 100644
  --- /dev/null
  +++ b/bdivergent1
  @@ -0,0 +1,1 @@
  +bdivergent

  $ hg up .^
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo bdivergent > bdivergent2
  $ hg ci -Am "divergent"
  adding bdivergent2
  created new head
  $ hg export
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 8374d2ddc3a4d48428c3d2f80e4fc86f13736f96
  # Parent  9092f1db7931481f93b37d5c9fbcfc341bcd7318
  divergent
  
  diff --git a/bdivergent2 b/bdivergent2
  new file mode 100644
  --- /dev/null
  +++ b/bdivergent2
  @@ -0,0 +1,1 @@
  +bdivergent

  $ hg prune -s 8374d2ddc3a4 "desc('added b')"
  1 changesets pruned
  $ hg prune -s 593c57f2117e "desc('added b')" --hidden
  1 changesets pruned
  2 new content-divergent changesets

  $ hg log -G --patch
  @  3:8374d2ddc3a4@default(draft) divergent [content-divergent]
  |  diff --git a/bdivergent2 b/bdivergent2
  |  new file mode 100644
  |  --- /dev/null
  |  +++ b/bdivergent2
  |  @@ -0,0 +1,1 @@
  |  +bdivergent
  |
  | *  2:593c57f2117e@default(draft) divergent [content-divergent]
  |/   diff --git a/bdivergent1 b/bdivergent1
  |    new file mode 100644
  |    --- /dev/null
  |    +++ b/bdivergent1
  |    @@ -0,0 +1,1 @@
  |    +bdivergent
  |
  o  0:9092f1db7931@default(draft) added a []
     diff --git a/a b/a
     new file mode 100644
     --- /dev/null
     +++ b/a
     @@ -0,0 +1,1 @@
     +a
  

  $ hg evolve --all --any --content-divergent
  merge:[2] divergent
  with: [3] divergent
  base: [1] added b
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory is now at 98ab969ac8fb
  $ hg log -G
  @  4:98ab969ac8fb@default(draft) divergent []
  |
  o  0:9092f1db7931@default(draft) added a []
  
  $ hg export
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 98ab969ac8fbe315e6d2c24a8eb5eab5b81e4242
  # Parent  9092f1db7931481f93b37d5c9fbcfc341bcd7318
  divergent
  
  diff --git a/bdivergent1 b/bdivergent1
  new file mode 100644
  --- /dev/null
  +++ b/bdivergent1
  @@ -0,0 +1,1 @@
  +bdivergent
  diff --git a/bdivergent2 b/bdivergent2
  new file mode 100644
  --- /dev/null
  +++ b/bdivergent2
  @@ -0,0 +1,1 @@
  +bdivergent

  $ cd ..

Extra setup
-----------

(the test below were initially in a different file)

  $ hg init cdiv
  $ cd cdiv
  $ echo ".*\.orig" > .hgignore
  $ hg add .hgignore
  $ hg ci -m "added hgignore"
  $ for ch in a b c d; do echo foo > $ch; hg add $ch; hg ci -qm "added "$ch; done;

  $ hg glog
  @  4:c41c793e0ef1 added d
  |   () [default] draft
  o  3:ca1b80f7960a added c
  |   () [default] draft
  o  2:b1661037fa25 added b
  |   () [default] draft
  o  1:c7586e2a9264 added a
  |   () [default] draft
  o  0:8fa14d15e168 added hgignore
      () [default] draft

Merging branch difference
-------------------------

Creating content-divergence with branch change where base, divergent and other
have different branches

  $ hg branch -r . foobar
  changed branch on 1 changesets

  $ hg up c41c793e0ef1 --hidden
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset c41c793e0ef1
  (hidden revision 'c41c793e0ef1' was rewritten as: 9e5dffcb3d48)
  working directory parent is obsolete! (c41c793e0ef1)
  (use 'hg evolve' to update to its successor: 9e5dffcb3d48)
  $ echo bar > d
  $ hg branch watwat
  marked working directory as branch watwat
  $ hg amend
  2 new content-divergent changesets

  $ hg glog
  @  6:264b04f771fb added d
  |   () [watwat] draft
  | *  5:9e5dffcb3d48 added d
  |/    () [foobar] draft
  o  3:ca1b80f7960a added c
  |   () [default] draft
  o  2:b1661037fa25 added b
  |   () [default] draft
  o  1:c7586e2a9264 added a
  |   () [default] draft
  o  0:8fa14d15e168 added hgignore
      () [default] draft

  $ hg evolve --content-divergent --no-all --config ui.interactive=True << EOF
  > c
  > EOF
  merge:[6] added d
  with: [5] added d
  base: [4] added d
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  content divergent changesets on different branches.
  choose branch for the resolution changeset. (a) default or (b) watwat or (c) foobar?  c
  working directory is now at 15ee7f765bf7

  $ hg glog
  @  7:15ee7f765bf7 added d
  |   () [foobar] draft
  o  3:ca1b80f7960a added c
  |   () [default] draft
  o  2:b1661037fa25 added b
  |   () [default] draft
  o  1:c7586e2a9264 added a
  |   () [default] draft
  o  0:8fa14d15e168 added hgignore
      () [default] draft

Testing merging of commit messages
-----------------------------------

When base and one of the divergent has same commit messages and other divergent
has different one

  $ echo wat > d
  $ hg amend

  $ hg up .^
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo bar > d
  $ hg ci -Aqm "added a d with bar in it, expect some beers"

  $ hg prune -r 'predecessors(desc("added d") - obsolete())' -s . --hidden
  1 changesets pruned
  2 new content-divergent changesets

  $ hg glog
  @  9:59081c9c425a added a d with bar in it, expect some beers
  |   () [default] draft
  | *  8:e6f07f2f33a9 added d
  |/    () [foobar] draft
  o  3:ca1b80f7960a added c
  |   () [default] draft
  o  2:b1661037fa25 added b
  |   () [default] draft
  o  1:c7586e2a9264 added a
  |   () [default] draft
  o  0:8fa14d15e168 added hgignore
      () [default] draft

  $ hg evolve --content-divergent --no-all
  merge:[9] added a d with bar in it, expect some beers
  with: [8] added d
  base: [7] added d
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory is now at 34e78e1673c1

  $ hg glog
  @  10:34e78e1673c1 added a d with bar in it, expect some beers
  |   () [default] draft
  o  3:ca1b80f7960a added c
  |   () [default] draft
  o  2:b1661037fa25 added b
  |   () [default] draft
  o  1:c7586e2a9264 added a
  |   () [default] draft
  o  0:8fa14d15e168 added hgignore
      () [default] draft

When base has different message and both divergents has same one

  $ echo foo > d
  $ hg amend -m "foo to d"

  $ hg up 'predecessors(.)' --hidden
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset 34e78e1673c1
  (hidden revision '34e78e1673c1' was rewritten as: c9d0d72972b0)
  working directory parent is obsolete! (34e78e1673c1)
  (use 'hg evolve' to update to its successor: c9d0d72972b0)
  $ echo babar > d
  $ hg amend -m "foo to d"
  2 new content-divergent changesets

  $ hg glog
  @  12:b4dadb3b47a7 foo to d
  |   () [default] draft
  | *  11:c9d0d72972b0 foo to d
  |/    () [default] draft
  o  3:ca1b80f7960a added c
  |   () [default] draft
  o  2:b1661037fa25 added b
  |   () [default] draft
  o  1:c7586e2a9264 added a
  |   () [default] draft
  o  0:8fa14d15e168 added hgignore
      () [default] draft

  $ hg evolve --content-divergent --no-all
  merge:[12] foo to d
  with: [11] foo to d
  base: [10] added a d with bar in it, expect some beers
  merging d
  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  unresolved merge conflicts
  (see 'hg help evolve.interrupted')
  [1]

  $ echo foobar > d
  $ hg resolve -m
  (no more unresolved files)
  continue: hg evolve --continue
  $ hg evolve --continue
  working directory is now at cfd599de811a

  $ hg glog
  @  13:cfd599de811a foo to d
  |   () [default] draft
  o  3:ca1b80f7960a added c
  |   () [default] draft
  o  2:b1661037fa25 added b
  |   () [default] draft
  o  1:c7586e2a9264 added a
  |   () [default] draft
  o  0:8fa14d15e168 added hgignore
      () [default] draft

When all three base, divergent and other has different commit messages creating
conflicts

  $ echo bar > d
  $ hg amend -m "bar to d, expect beers"

  $ hg up 'predecessors(.)' --hidden
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset cfd599de811a
  (hidden revision 'cfd599de811a' was rewritten as: ba0941ffb747)
  working directory parent is obsolete! (cfd599de811a)
  (use 'hg evolve' to update to its successor: ba0941ffb747)
  $ echo wat > d
  $ hg amend -m "wat to d, wat?"
  2 new content-divergent changesets

  $ hg glog
  @  15:4127dd63df67 wat to d, wat?
  |   () [default] draft
  | *  14:ba0941ffb747 bar to d, expect beers
  |/    () [default] draft
  o  3:ca1b80f7960a added c
  |   () [default] draft
  o  2:b1661037fa25 added b
  |   () [default] draft
  o  1:c7586e2a9264 added a
  |   () [default] draft
  o  0:8fa14d15e168 added hgignore
      () [default] draft

  $ hg evolve --content-divergent --no-all
  merge:[15] wat to d, wat?
  with: [14] bar to d, expect beers
  base: [13] foo to d
  merging d
  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  unresolved merge conflicts
  (see 'hg help evolve.interrupted')
  [1]

  $ echo watbar > d
  $ hg resolve -m
  (no more unresolved files)
  continue: hg evolve --continue

  $ cat > editor.sh <<EOF
  > #!/bin/sh
  > printf "**showing editors text**\n\n"
  > cat \$1
  > printf "\n**done showing editors text**\n\n"
  > cat > \$1 <<ENDOF
  > watbar to d
  > ENDOF
  > EOF

  $ HGEDITOR='sh ./editor.sh' hg evolve --continue
  **showing editors text**
  
  HG: Conflicts while merging changeset description of content-divergent changesets.
  HG: Resolve conflicts in commit messages to continue.
  
  <<<<<<< divergent
  wat to d, wat?||||||| base
  foo to d=======
  bar to d, expect beers>>>>>>> other
  
  **done showing editors text**
  
  working directory is now at b4c8664fa327

  $ hg glog
  @  16:b4c8664fa327 watbar to d
  |   () [default] draft
  o  3:ca1b80f7960a added c
  |   () [default] draft
  o  2:b1661037fa25 added b
  |   () [default] draft
  o  1:c7586e2a9264 added a
  |   () [default] draft
  o  0:8fa14d15e168 added hgignore
      () [default] draft

  $ cd ..

Stabilize content-divergent changesets with same parent
=======================================================


  $ glog() {
  >   hg log -G --template \
  >     '{rev}:{node|short}@{branch}({phase}) bk:[{bookmarks}] {desc|firstline}\n' "$@"
  > }

  $ hg init content-divergent-savanna
  $ cd content-divergent-savanna
  $ echo a > a
  $ hg add a
  $ hg ci -m 'root'
  $ hg phase --public .
  $ cat << EOF >> a
  > flore
  > arthur
  > zephir
  > some
  > less
  > conflict
  > EOF
  $ hg ci -m 'More addition'
  $ glog
  @  1:867e43582046@default(draft) bk:[] More addition
  |
  o  0:6569b5a81c7e@default(public) bk:[] root
  
  $ echo 'babar' >> a
  $ hg amend
  $ hg up --hidden 'min(desc("More addition"))'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset 867e43582046
  (hidden revision '867e43582046' was rewritten as: fc6349f931da)
  working directory parent is obsolete! (867e43582046)
  (use 'hg evolve' to update to its successor: fc6349f931da)
  $ mv a a.old
  $ echo 'jungle' > a
  $ cat a.old >> a
  $ rm a.old
  $ hg amend
  2 new content-divergent changesets
  $ glog
  @  3:051337a45e7c@default(draft) bk:[] More addition
  |
  | *  2:fc6349f931da@default(draft) bk:[] More addition
  |/
  o  0:6569b5a81c7e@default(public) bk:[] root
  

Stabilize it

  $ hg evolve -qn --confirm --content-divergent --no-all
  merge:[3] More addition
  with: [2] More addition
  base: [1] More addition
  perform evolve? [Ny] n
  abort: evolve aborted by user
  [255]
  $ echo y | hg evolve -qn --confirm --config ui.interactive=True --content-divergent --no-all
  merge:[3] More addition
  with: [2] More addition
  base: [1] More addition
  perform evolve? [Ny] y
  hg update -c 051337a45e7c &&
  hg merge fc6349f931da &&
  hg commit -m "auto merge resolving conflict between 051337a45e7c and fc6349f931da"&&
  hg up -C 867e43582046 &&
  hg revert --all --rev tip &&
  hg commit -m "`hg log -r 051337a45e7c --template={desc}`";
  $ hg evolve -v --content-divergent --no-all
  merge:[3] More addition
  with: [2] More addition
  base: [1] More addition
  merging "other" content-divergent changeset 'fc6349f931da'
  resolving manifests
  merging a
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  committing files:
  a
  committing manifest
  committing changelog
  working directory is now at 6aa6f90a9f68
  $ hg st
  $ glog
  @  4:6aa6f90a9f68@default(draft) bk:[] More addition
  |
  o  0:6569b5a81c7e@default(public) bk:[] root
  
  $ hg summary
  parent: 4:6aa6f90a9f68 tip
   More addition
  branch: default
  commit: (clean)
  update: (current)
  phases: 1 draft
  $ hg export . --config diff.unified=3
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 6aa6f90a9f684b8a4b698234e25c5dad7328b199
  # Parent  6569b5a81c7e307ddc076550e8c0f6d75b6effcd
  More addition
  
  diff --git a/a b/a
  --- a/a
  +++ b/a
  @@ -1,1 +1,9 @@
  +jungle
   a
  +flore
  +arthur
  +zephir
  +some
  +less
  +conflict
  +babar

Check conflict during content-divergence resolution
---------------------------------------------------


  $ hg up --hidden 'min(desc("More addition"))'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset 867e43582046
  (hidden revision '867e43582046' was rewritten as: 6aa6f90a9f68)
  working directory parent is obsolete! (867e43582046)
  (use 'hg evolve' to update to its successor: 6aa6f90a9f68)
  $ echo 'gotta break' >> a
  $ hg amend
  2 new content-divergent changesets

# reamend so that the case is not the first precursor.

  $ hg amend -m "More addition (2)"
  $ hg phase 'contentdivergent()'
  4: draft
  6: draft

  $ glog
  @  6:13c1b75640a1@default(draft) bk:[] More addition (2)
  |
  | *  4:6aa6f90a9f68@default(draft) bk:[] More addition
  |/
  o  0:6569b5a81c7e@default(public) bk:[] root
  

  $ hg evolve -qn --content-divergent --no-all
  hg update -c 13c1b75640a1 &&
  hg merge 6aa6f90a9f68 &&
  hg commit -m "auto merge resolving conflict between 13c1b75640a1 and 6aa6f90a9f68"&&
  hg up -C 867e43582046 &&
  hg revert --all --rev tip &&
  hg commit -m "`hg log -r 13c1b75640a1 --template={desc}`";
  $ hg evolve --content-divergent --no-all
  merge:[6] More addition (2)
  with: [4] More addition
  base: [1] More addition
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
  unresolved merge conflicts
  (see 'hg help evolve.interrupted')
  [1]

  $ cat > a <<EOF
  > jungle
  > a
  > flore
  > arthur
  > zephir
  > some
  > less
  > conflict
  > babar
  > EOF

  $ hg resolve -m
  (no more unresolved files)
  continue: hg evolve --continue
  $ hg evolve --continue
  working directory is now at 22dc0f618f0d
  $ glog
  @  7:22dc0f618f0d@default(draft) bk:[] More addition (2)
  |
  o  0:6569b5a81c7e@default(public) bk:[] root
  
  $ hg exp  --config diff.unified=3
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 22dc0f618f0d8714c611e7a683ad229a575f167c
  # Parent  6569b5a81c7e307ddc076550e8c0f6d75b6effcd
  More addition (2)
  
  diff --git a/a b/a
  --- a/a
  +++ b/a
  @@ -1,1 +1,9 @@
  +jungle
   a
  +flore
  +arthur
  +zephir
  +some
  +less
  +conflict
  +babar
  $ cd ..

Check case where one side undo some of the common predecessors change
---------------------------------------------------------------------

The goal is to make sure we merge using the right base.

  $ hg init predecessors-as-merge-base
  $ cd predecessors-as-merge-base
  $ cat << EOF > numbers
  > 1
  > 2
  > 3
  > 4
  > 5
  > 6
  > 7
  > 8
  > 9
  > EOF
  $ cat << EOF > letters
  > a
  > b
  > c
  > d
  > e
  > f
  > g
  > h
  > i
  > EOF
  $ cat << EOF > romans
  > I
  > II
  > III
  > IV
  > V
  > VI
  > VII
  > VIII
  > IX
  > EOF
  $ hg add numbers letters romans
  $ hg commit -m root
  $ cat << EOF > numbers
  > 1
  > 2
  > 3
  > four
  > 5
  > 6
  > 7
  > 8
  > 9
  > EOF
  $ cat << EOF > letters
  > a
  > b
  > c
  > D
  > e
  > f
  > g
  > h
  > i
  > EOF
  $ hg commit -m E1
  $ cat << EOF > numbers
  > 1
  > 2
  > 3
  > 4
  > 5
  > 6
  > seven
  > 8
  > 9
  > EOF
  $ cat << EOF > romans
  > I
  > II
  > III
  > IV
  > V
  > vi
  > VII
  > VIII
  > IX
  > EOF
  $ hg commit --amend -m E2
  $ hg --hidden update -r 'desc(E1)'
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset 4a250e5bd992
  (hidden revision '4a250e5bd992' was rewritten as: 084ae625fa51)
  working directory parent is obsolete! (4a250e5bd992)
  (use 'hg evolve' to update to its successor: 084ae625fa51)
  $ cat << EOF > numbers
  > one
  > 2
  > 3
  > four
  > 5
  > 6
  > 7
  > 8
  > 9
  > EOF
  $ cat << EOF > letters
  > a
  > b
  > c
  > d
  > e
  > f
  > g
  > h
  > i
  > EOF
  $ cat << EOF > romans
  > I
  > ii
  > III
  > IV
  > V
  > VI
  > VII
  > VIII
  > IX
  > EOF
  $ hg commit --amend -m E3
  2 new content-divergent changesets
  $ hg log -G --patch --hidden
  @  3:19ed1bf64a2c@default(draft) E3 [content-divergent]
  |  diff --git a/numbers b/numbers
  |  --- a/numbers
  |  +++ b/numbers
  |  @@ -1,1 +1,1 @@
  |  -1
  |  +one
  |  @@ -4,1 +4,1 @@
  |  -4
  |  +four
  |  diff --git a/romans b/romans
  |  --- a/romans
  |  +++ b/romans
  |  @@ -2,1 +2,1 @@
  |  -II
  |  +ii
  |
  | *  2:084ae625fa51@default(draft) E2 [content-divergent]
  |/   diff --git a/letters b/letters
  |    --- a/letters
  |    +++ b/letters
  |    @@ -4,1 +4,1 @@
  |    -d
  |    +D
  |    diff --git a/numbers b/numbers
  |    --- a/numbers
  |    +++ b/numbers
  |    @@ -7,1 +7,1 @@
  |    -7
  |    +seven
  |    diff --git a/romans b/romans
  |    --- a/romans
  |    +++ b/romans
  |    @@ -6,1 +6,1 @@
  |    -VI
  |    +vi
  |
  | x  1:4a250e5bd992@default(draft) E1 []
  |/   diff --git a/letters b/letters
  |    --- a/letters
  |    +++ b/letters
  |    @@ -4,1 +4,1 @@
  |    -d
  |    +D
  |    diff --git a/numbers b/numbers
  |    --- a/numbers
  |    +++ b/numbers
  |    @@ -4,1 +4,1 @@
  |    -4
  |    +four
  |
  o  0:6d1fdf6de7e2@default(draft) root []
     diff --git a/letters b/letters
     new file mode 100644
     --- /dev/null
     +++ b/letters
     @@ -0,0 +1,9 @@
     +a
     +b
     +c
     +d
     +e
     +f
     +g
     +h
     +i
     diff --git a/numbers b/numbers
     new file mode 100644
     --- /dev/null
     +++ b/numbers
     @@ -0,0 +1,9 @@
     +1
     +2
     +3
     +4
     +5
     +6
     +7
     +8
     +9
     diff --git a/romans b/romans
     new file mode 100644
     --- /dev/null
     +++ b/romans
     @@ -0,0 +1,9 @@
     +I
     +II
     +III
     +IV
     +V
     +VI
     +VII
     +VIII
     +IX
  
  $ hg evolve --list
  084ae625fa51: E2
    content-divergent: 19ed1bf64a2c (draft) (precursor 4a250e5bd992)
  
  19ed1bf64a2c: E3
    content-divergent: 084ae625fa51 (draft) (precursor 4a250e5bd992)
  
  $ hg debugobsolete
  4a250e5bd992a897655e3b6f238e12452cf063e9 084ae625fa51ca8c441ba1d2bf0f974b21671017 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
  4a250e5bd992a897655e3b6f238e12452cf063e9 19ed1bf64a2cc2a824df5ac33a436eca1ae0475d 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
  $ hg obslog --all --patch
  *  084ae625fa51 (2) E2
  |    rewritten(description, content) from 4a250e5bd992 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
  |      diff -r 4a250e5bd992 -r 084ae625fa51 changeset-description
  |      --- a/changeset-description
  |      +++ b/changeset-description
  |      @@ -1,1 +1,1 @@
  |      -E1
  |      +E2
  |
  |      diff --git a/numbers b/numbers
  |      --- a/numbers
  |      +++ b/numbers
  |      @@ -4,1 +4,1 @@
  |      -four
  |      +4
  |      @@ -7,1 +7,1 @@
  |      -7
  |      +seven
  |      diff --git a/romans b/romans
  |      --- a/romans
  |      +++ b/romans
  |      @@ -6,1 +6,1 @@
  |      -VI
  |      +vi
  |
  |
  | @  19ed1bf64a2c (3) E3
  |/     rewritten(description, content) from 4a250e5bd992 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
  |        diff -r 4a250e5bd992 -r 19ed1bf64a2c changeset-description
  |        --- a/changeset-description
  |        +++ b/changeset-description
  |        @@ -1,1 +1,1 @@
  |        -E1
  |        +E3
  |
  |        diff --git a/letters b/letters
  |        --- a/letters
  |        +++ b/letters
  |        @@ -4,1 +4,1 @@
  |        -D
  |        +d
  |        diff --git a/numbers b/numbers
  |        --- a/numbers
  |        +++ b/numbers
  |        @@ -1,1 +1,1 @@
  |        -1
  |        +one
  |        diff --git a/romans b/romans
  |        --- a/romans
  |        +++ b/romans
  |        @@ -2,1 +2,1 @@
  |        -II
  |        +ii
  |
  |
  x  4a250e5bd992 (1) E1
  

  $ hg evolve --content-divergent --rev 'desc("E3")'
  merge:[2] E2
  with: [3] E3
  base: [1] E1
  merging numbers
  merging romans
  1 files updated, 2 files merged, 0 files removed, 0 files unresolved
  working directory is now at e7cb08a7241a
  $ hg status
  $ hg amend -m 'E4'
  $ hg export
  # HG changeset patch
  # User test
  # Date 0 0
  #      Thu Jan 01 00:00:00 1970 +0000
  # Node ID 50bb00cad3206c79d231a621e319772302a88d8d
  # Parent  6d1fdf6de7e2d9fc9b098aa286b60785bbeaab7a
  E4
  
  diff --git a/numbers b/numbers
  --- a/numbers
  +++ b/numbers
  @@ -1,1 +1,1 @@
  -1
  +one
  @@ -7,1 +7,1 @@
  -7
  +seven
  diff --git a/romans b/romans
  --- a/romans
  +++ b/romans
  @@ -2,1 +2,1 @@
  -II
  +ii
  @@ -6,1 +6,1 @@
  -VI
  +vi
  $ hg log -G
  @  5:50bb00cad320@default(draft) E4 []
  |
  o  0:6d1fdf6de7e2@default(draft) root []
  
  $ hg debugobsolete
  4a250e5bd992a897655e3b6f238e12452cf063e9 084ae625fa51ca8c441ba1d2bf0f974b21671017 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
  4a250e5bd992a897655e3b6f238e12452cf063e9 19ed1bf64a2cc2a824df5ac33a436eca1ae0475d 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
  084ae625fa51ca8c441ba1d2bf0f974b21671017 e7cb08a7241a98c908db298b61fc033b27f648c7 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'evolve', 'user': 'test'}
  19ed1bf64a2cc2a824df5ac33a436eca1ae0475d e7cb08a7241a98c908db298b61fc033b27f648c7 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'evolve', 'user': 'test'}
  e7cb08a7241a98c908db298b61fc033b27f648c7 50bb00cad3206c79d231a621e319772302a88d8d 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '1', 'operation': 'amend', 'user': 'test'}
  $ hg obslog --patch
  @  50bb00cad320 (5) E4
  |    reworded(description) from e7cb08a7241a using amend by test (Thu Jan 01 00:00:00 1970 +0000)
  |      diff -r e7cb08a7241a -r 50bb00cad320 changeset-description
  |      --- a/changeset-description
  |      +++ b/changeset-description
  |      @@ -1,4 +1,1 @@
  |      -<<<<<<< divergent
  |      -E2||||||| base
  |      -E1=======
  |      -E3>>>>>>> other
  |      +E4
  |
  |
  x    e7cb08a7241a (4) <<<<<<< divergent
  |\     rewritten(description, content) from 084ae625fa51 using evolve by test (Thu Jan 01 00:00:00 1970 +0000)
  | |      diff -r 084ae625fa51 -r e7cb08a7241a changeset-description
  | |      --- a/changeset-description
  | |      +++ b/changeset-description
  | |      @@ -1,1 +1,4 @@
  | |      -E2
  | |      +<<<<<<< divergent
  | |      +E2||||||| base
  | |      +E1=======
  | |      +E3>>>>>>> other
  | |
  | |      diff --git a/letters b/letters
  | |      --- a/letters
  | |      +++ b/letters
  | |      @@ -4,1 +4,1 @@
  | |      -D
  | |      +d
  | |      diff --git a/numbers b/numbers
  | |      --- a/numbers
  | |      +++ b/numbers
  | |      @@ -1,1 +1,1 @@
  | |      -1
  | |      +one
  | |      diff --git a/romans b/romans
  | |      --- a/romans
  | |      +++ b/romans
  | |      @@ -2,1 +2,1 @@
  | |      -II
  | |      +ii
  | |
  | |    rewritten(description, content) from 19ed1bf64a2c using evolve by test (Thu Jan 01 00:00:00 1970 +0000)
  | |      diff -r 19ed1bf64a2c -r e7cb08a7241a changeset-description
  | |      --- a/changeset-description
  | |      +++ b/changeset-description
  | |      @@ -1,1 +1,4 @@
  | |      -E3
  | |      +<<<<<<< divergent
  | |      +E2||||||| base
  | |      +E1=======
  | |      +E3>>>>>>> other
  | |
  | |      diff --git a/numbers b/numbers
  | |      --- a/numbers
  | |      +++ b/numbers
  | |      @@ -4,1 +4,1 @@
  | |      -four
  | |      +4
  | |      @@ -7,1 +7,1 @@
  | |      -7
  | |      +seven
  | |      diff --git a/romans b/romans
  | |      --- a/romans
  | |      +++ b/romans
  | |      @@ -6,1 +6,1 @@
  | |      -VI
  | |      +vi
  | |
  | |
  x |  084ae625fa51 (2) E2
  | |    rewritten(description, content) from 4a250e5bd992 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
  | |      diff -r 4a250e5bd992 -r 084ae625fa51 changeset-description
  | |      --- a/changeset-description
  | |      +++ b/changeset-description
  | |      @@ -1,1 +1,1 @@
  | |      -E1
  | |      +E2
  | |
  | |      diff --git a/numbers b/numbers
  | |      --- a/numbers
  | |      +++ b/numbers
  | |      @@ -4,1 +4,1 @@
  | |      -four
  | |      +4
  | |      @@ -7,1 +7,1 @@
  | |      -7
  | |      +seven
  | |      diff --git a/romans b/romans
  | |      --- a/romans
  | |      +++ b/romans
  | |      @@ -6,1 +6,1 @@
  | |      -VI
  | |      +vi
  | |
  | |
  | x  19ed1bf64a2c (3) E3
  |/     rewritten(description, content) from 4a250e5bd992 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
  |        diff -r 4a250e5bd992 -r 19ed1bf64a2c changeset-description
  |        --- a/changeset-description
  |        +++ b/changeset-description
  |        @@ -1,1 +1,1 @@
  |        -E1
  |        +E3
  |
  |        diff --git a/letters b/letters
  |        --- a/letters
  |        +++ b/letters
  |        @@ -4,1 +4,1 @@
  |        -D
  |        +d
  |        diff --git a/numbers b/numbers
  |        --- a/numbers
  |        +++ b/numbers
  |        @@ -1,1 +1,1 @@
  |        -1
  |        +one
  |        diff --git a/romans b/romans
  |        --- a/romans
  |        +++ b/romans
  |        @@ -2,1 +2,1 @@
  |        -II
  |        +ii
  |
  |
  x  4a250e5bd992 (1) E1