view tests/test-evolve-content-divergent-basic.t @ 4722:7839720c7c75

rewind: make sure merge commits include files from p1 and p2

Otherwise rewinding a merge commit makes it lose all changes.

This fix populates `updates` argument of rewriteutil.rewrite() with parent
changesets. That argument is normally used for folding multiple changesets, but
in this case it's simply used to include files from p1 and p2. Usually,
rewrite() works fine using ctx.files(), but that function can return an empty
list when ctx is a merge commit.

=======================================================
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
  > [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 45bf1312f454
  $ hg log -G
  @  4:45bf1312f454@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 45bf1312f45468b76158b33f8426e6530c8b35b1
  # 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 0ac42f1bc15c

  $ hg glog
  @  7:0ac42f1bc15c 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 0ac42f1bc15c -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:f621d00f5f0e 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 a9d6fd6b5e40

  $ hg glog
  @  10:a9d6fd6b5e40 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 a9d6fd6b5e40 --hidden
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset a9d6fd6b5e40
  (hidden revision 'a9d6fd6b5e40' was rewritten as: b10b07a394f1)
  working directory parent is obsolete! (a9d6fd6b5e40)
  (use 'hg evolve' to update to its successor: b10b07a394f1)
  $ echo babar > d
  $ hg amend -m "foo to d"
  2 new content-divergent changesets

  $ hg glog
  @  12:0bb497fed24a foo to d
  |   () [default] draft
  | *  11:b10b07a394f1 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 11175423b5dc

  $ hg glog
  @  13:11175423b5dc 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 11175423b5dc --hidden
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  updated to hidden changeset 11175423b5dc
  (hidden revision '11175423b5dc' was rewritten as: 27f0463f169a)
  working directory parent is obsolete! (11175423b5dc)
  (use 'hg evolve' to update to its successor: 27f0463f169a)
  $ echo wat > d
  $ hg amend -m "wat to d, wat?"
  2 new content-divergent changesets

  $ hg glog
  @  15:f542037ddf31 wat to d, wat?
  |   () [default] draft
  | *  14:27f0463f169a 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 89ea3eee2d69

  $ hg glog
  @  16:89ea3eee2d69 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 5bf84d1d71d1
  $ hg st
  $ glog
  @  4:5bf84d1d71d1@default(draft) bk:[] More addition
  |
  o  0:6569b5a81c7e@default(public) bk:[] root
  
  $ hg summary
  parent: 4:5bf84d1d71d1 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 5bf84d1d71d12f451bfe1e09b93045eb6338cd6c
  # 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: 5bf84d1d71d1)
  working directory parent is obsolete! (867e43582046)
  (use 'hg evolve' to update to its successor: 5bf84d1d71d1)
  $ 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)
  |
  | *  4:5bf84d1d71d1@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 5bf84d1d71d1 &&
  hg commit -m "auto merge resolving conflict between 13c1b75640a1 and 5bf84d1d71d1"&&
  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 2346e1147fed
  $ glog
  @  7:2346e1147fed@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 2346e1147fedc8c9aa17f9ba7870dcd8be52f567
  # 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 obslog --all --patch
  *  084ae625fa51 (2) E2
  |
  | @  19ed1bf64a2c (3) E3
  |/
  x  4a250e5bd992 (1) E1
       rewritten(description, content) as 084ae625fa51 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
  
       rewritten(description, content) as 19ed1bf64a2c 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
  
  

  $ 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 aae293050980
  $ 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 8c2a6aae4bc5c1cc00c68276017dcef3d468e895
  # 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
  @  5:8c2a6aae4bc5@default(draft) E4 []
  |
  o  0:6d1fdf6de7e2@default(draft) root []
  
  $ hg obslog --patch
  @  8c2a6aae4bc5 (5) E4
  |
  x    aae293050980 (4) <<<<<<< divergent
  |\     rewritten(description) as 8c2a6aae4bc5 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
  | |      diff -r aae293050980 -r 8c2a6aae4bc5 changeset-description
  | |      --- a/changeset-description
  | |      +++ b/changeset-description
  | |      @@ -1,4 +1,1 @@
  | |      -<<<<<<< divergent
  | |      -E2||||||| base
  | |      -E1=======
  | |      -E3>>>>>>> other
  | |      +E4
  | |
  | |
  x |  084ae625fa51 (2) E2
  | |    rewritten(description, content) as aae293050980 using evolve by test (Thu Jan 01 00:00:00 1970 +0000)
  | |      diff -r 084ae625fa51 -r aae293050980 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
  | |
  | |
  | x  19ed1bf64a2c (3) E3
  |/     rewritten(description, content) as aae293050980 using evolve by test (Thu Jan 01 00:00:00 1970 +0000)
  |        diff -r 19ed1bf64a2c -r aae293050980 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  4a250e5bd992 (1) E1
       rewritten(description, content) as 084ae625fa51 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
  
       rewritten(description, content) as 19ed1bf64a2c 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