view tests/test-stabilize-conflict.t @ 4442:819bad275701

evolve: add logic to handle a particular case in divergence resolution

Case is: In content divergence, to check if the two csets are on different
parent or same parent what we do is find gca of the two csets and then
compare it with the singlesuccessors of two csets's parents.

Now, if gca is same as singlesuccessors of both the csets then we conclude
that both are on the same parent which is not totally correct as it is
possible that both the parents of two csets are obsolete with a single
successor.

This patch adds the logic to cover the above metioned case correctly,
deciding the part when we need to relocate a cset to other side while
resolving the stack of divergent csets.

Changes in test file demonstrate that before this patch we were not
doing it right because it should have relocated every node to other side
instead of just relocating the first one from the stack.

=========================================================
Test the proper behavior of evolve during merge conflict.
=========================================================

Initial setup

  $ cat >> $HGRCPATH <<EOF
  > [ui]
  > interactive=false
  > merge=internal:merge
  > promptecho = True
  > [defaults]
  > amend=-d "0 0"
  > [merge-tools]
  > touch.checkchanged=true
  > touch.gui=true
  > touch.args=babar
  > [extensions]
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

  $ safesed() {
  >   sed "$1" "$2" > `pwd`/sed.temp
  >   mv `pwd`/sed.temp "$2"
  > }

create a simple repo

  $ hg init repo
  $ cd repo
  $ cat << EOF > babar
  > un
  > deux
  > trois
  > quatre
  > cinq
  > EOF
  $ hg add babar
  $ hg commit -m "babar count up to five"
  $ cat << EOF >> babar
  > six
  > sept
  > huit
  > neuf
  > dix
  > EOF
  $ hg commit -m "babar count up to ten"
  $ cat << EOF >> babar
  > onze
  > douze
  > treize
  > quatorze
  > quinze
  > EOF
  $ hg commit -m "babar count up to fifteen"


proper behavior without conflict
----------------------------------

  $ hg gdown
  gdown have been deprecated in favor of previous
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  [1] babar count up to ten
  $ safesed 's/huit/eight/' babar
  $ hg diff
  diff -r 9d5daf8bd956 babar
  --- a/babar	Thu Jan 01 00:00:00 1970 +0000
  +++ b/babar	Thu Jan 01 00:00:00 1970 +0000
  @@ -5,6 +5,6 @@
   cinq
   six
   sept
  -huit
  +eight
   neuf
   dix
  $ hg amend
  1 new orphan changesets
  $ hg evolve
  move:[2] babar count up to fifteen
  atop:[3] babar count up to ten
  merging babar
  working directory is now at 71c18f70c34f
  $ hg resolve -l
  $ hg log -G
  @  changeset:   4:71c18f70c34f
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     babar count up to fifteen
  |
  o  changeset:   3:5977072d13c5
  |  parent:      0:29ec1554cfaf
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     babar count up to ten
  |
  o  changeset:   0:29ec1554cfaf
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     babar count up to five
  


proper behavior with conflict using internal:merge
--------------------------------------------------

  $ hg gdown
  gdown have been deprecated in favor of previous
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  [3] babar count up to ten
  $ safesed 's/dix/ten/' babar
  $ hg diff
  diff -r 5977072d13c5 babar
  --- a/babar	Thu Jan 01 00:00:00 1970 +0000
  +++ b/babar	Thu Jan 01 00:00:00 1970 +0000
  @@ -7,4 +7,4 @@
   sept
   eight
   neuf
  -dix
  +ten
  $ hg amend
  1 new orphan changesets
  $ hg evolve
  move:[4] babar count up to fifteen
  atop:[5] babar count up to ten
  merging babar
  warning: conflicts while merging babar! (edit, then use 'hg resolve --mark')
  fix conflicts and see `hg help evolve.interrupted`
  [1]
  $ hg resolve -l
  U babar
  $ hg log -G
  @  changeset:   5:e04690b09bc6
  |  tag:         tip
  |  parent:      0:29ec1554cfaf
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     babar count up to ten
  |
  | @  changeset:   4:71c18f70c34f
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  instability: orphan
  | |  summary:     babar count up to fifteen
  | |
  | x  changeset:   3:5977072d13c5
  |/   parent:      0:29ec1554cfaf
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    obsolete:    amended using amend as 5:e04690b09bc6
  |    summary:     babar count up to ten
  |
  o  changeset:   0:29ec1554cfaf
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     babar count up to five
  
(fix the conflict and continue)

  $ hg revert -r 71c18f70c34f --all
  reverting babar
  $ safesed 's/dix/ten/' babar
  $ hg resolve --all -m
  (no more unresolved files)
  continue: hg evolve --continue
  $ hg evolve --continue
  evolving 4:71c18f70c34f "babar count up to fifteen"
  working directory is now at 1836b91c6c1d
  $ hg resolve -l
  $ hg log -G
  @  changeset:   6:1836b91c6c1d
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     babar count up to fifteen
  |
  o  changeset:   5:e04690b09bc6
  |  parent:      0:29ec1554cfaf
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     babar count up to ten
  |
  o  changeset:   0:29ec1554cfaf
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     babar count up to five
  
proper behavior with conflict using an external merge tool
----------------------------------------------------------

  $ safesed 's/merge=.*/merge=touch/' $HGRCPATH
  $ safesed 's/touch.gui=.*/touch.gui=false/' $HGRCPATH
  $ hg gdown
  gdown have been deprecated in favor of previous
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  [5] babar count up to ten
  $ safesed 's/ten/zehn/' babar
  $ hg diff
  diff -r e04690b09bc6 babar
  --- a/babar	Thu Jan 01 00:00:00 1970 +0000
  +++ b/babar	Thu Jan 01 00:00:00 1970 +0000
  @@ -7,4 +7,4 @@
   sept
   eight
   neuf
  -ten
  +zehn
  $ hg amend
  1 new orphan changesets
  $ safesed 's/interactive=.*/interactive=true/' $HGRCPATH
  $ hg evolve --tool touch <<EOF
  > n
  > EOF
  move:[6] babar count up to fifteen
  atop:[7] babar count up to ten
  merging babar
   output file babar appears unchanged
  was merge successful (yn)? n
  merging babar failed!
  fix conflicts and see `hg help evolve.interrupted`
  [1]
  $ hg resolve -l
  U babar
  $ hg log -G
  @  changeset:   7:b20d08eea373
  |  tag:         tip
  |  parent:      0:29ec1554cfaf
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     babar count up to ten
  |
  | @  changeset:   6:1836b91c6c1d
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  instability: orphan
  | |  summary:     babar count up to fifteen
  | |
  | x  changeset:   5:e04690b09bc6
  |/   parent:      0:29ec1554cfaf
  |    user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    obsolete:    amended using amend as 7:b20d08eea373
  |    summary:     babar count up to ten
  |
  o  changeset:   0:29ec1554cfaf
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     babar count up to five
  
  $ cat babar
  un
  deux
  trois
  quatre
  cinq
  six
  sept
  eight
  neuf
  zehn