** Testing resolution of orphans by `hg evolve` when merges are involved **

  $ cat >> $HGRCPATH <<EOF

  > [ui]

  > interactive = True

  > [alias]

  > glog = log -GT "{rev}:{node|short} {desc}\n ({bookmarks}) {phase}"

  > [extensions]

  > rebase =

  > EOF

  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

Repo Setup

  $ hg init repo

  $ cd repo

  $ echo ".*\.orig" > .hgignore

  $ hg add .hgignore

  $ hg ci -m "added hgignore"

An orphan merge changeset with one of the parent obsoleted

==========================================================

1) When merging both the parents does not result in conflicts

-------------------------------------------------------------

  $ echo foo > a

  $ hg ci -Aqm "added a"

  $ hg up .^

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo foo > b

  $ hg ci -Aqm "added b"

  $ hg merge

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg ci -m "merging a and b"

  $ hg glog

  @    3:3b2b6f4652ee merging a and b

  |\    () draft

  | o  2:d76850646258 added b

  | |   () draft

  o |  1:c7586e2a9264 added a

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

Testing with obsoleting the second parent

  $ hg up d76850646258

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo bar > b

  $ hg amend

  1 new orphan changesets

  $ hg glog

  @  4:64370c9805e7 added b

  |   () draft

  | *    3:3b2b6f4652ee merging a and b

  | |\    () draft

  +---x  2:d76850646258 added b

  | |     () draft

  | o  1:c7586e2a9264 added a

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg evolve --all

  move:[3] merging a and b

  atop:[4] added b

  working directory is now at 91fd62122a4b

  $ hg glog

  @    5:91fd62122a4b merging a and b

  |\    () draft

  | o  4:64370c9805e7 added b

  | |   () draft

  o |  1:c7586e2a9264 added a

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg parents

  changeset:   5:91fd62122a4b

  tag:         tip

  parent:      4:64370c9805e7

  parent:      1:c7586e2a9264

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     merging a and b

Testing with obsoleting the first parent

  $ hg up c7586e2a9264

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo bar > a

  $ hg amend

  1 new orphan changesets

  $ hg glog

  @  6:3d41537b44ca added a

  |   () draft

  | *    5:91fd62122a4b merging a and b

  | |\    () draft

  +---o  4:64370c9805e7 added b

  | |     () draft

  | x  1:c7586e2a9264 added a

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg evolve --all

  move:[5] merging a and b

  atop:[6] added a

  working directory is now at 968d205ba4d8

  $ hg glog

  @    7:968d205ba4d8 merging a and b

  |\    () draft

  | o  6:3d41537b44ca added a

  | |   () draft

  o |  4:64370c9805e7 added b

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg parents

  changeset:   7:968d205ba4d8

  tag:         tip

  parent:      6:3d41537b44ca

  parent:      4:64370c9805e7

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     merging a and b

2) When merging both the parents resulted in conflicts

------------------------------------------------------

  $ hg up 8fa14d15e168

  0 files updated, 0 files merged, 2 files removed, 0 files unresolved

  $ echo foo > c

  $ hg ci -Aqm "foo to c"

  $ hg prev

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  [0] added hgignore

  $ echo bar > c

  $ hg ci -Aqm "bar to c"

  $ hg glog

  @  9:d0f84b25d4e3 bar to c

  |   () draft

  | o  8:1c165c673853 foo to c

  |/    () draft

  | o    7:968d205ba4d8 merging a and b

  | |\    () draft

  +---o  6:3d41537b44ca added a

  | |     () draft

  | o  4:64370c9805e7 added b

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

Prune old test changesets to have clear graph view

  $ hg prune -r 64370c9805e7 -r 3d41537b44ca -r 968d205ba4d8

  3 changesets pruned

  $ hg glog

  @  9:d0f84b25d4e3 bar to c

  |   () draft

  | o  8:1c165c673853 foo to c

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg merge

  merging c

  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')

  0 files updated, 0 files merged, 0 files removed, 1 files unresolved

  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon

  [1]

  $ echo foobar > c

  $ hg resolve -m

  (no more unresolved files)

  $ hg ci -m "foobar to c"

  $ hg glog

  @    10:fd41d25a3e90 foobar to c

  |\    () draft

  | o  9:d0f84b25d4e3 bar to c

  | |   () draft

  o |  8:1c165c673853 foo to c

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

Testing with first parent obsoleted

  $ hg up 1c165c673853

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ echo FOO > c

  $ hg amend

  1 new orphan changesets

  $ hg glog

  @  11:31c317b7bdb1 foo to c

  |   () draft

  | *    10:fd41d25a3e90 foobar to c

  | |\    () draft

  +---o  9:d0f84b25d4e3 bar to c

  | |     () draft

  | x  8:1c165c673853 foo to c

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg evolve --all

  move:[10] foobar to c

  atop:[11] foo to c

  merging c

  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')

  evolve failed!

  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort

  abort: unresolved merge conflicts (see hg help resolve)

  [255]

  $ echo FOObar > c

  $ hg resolve -m

  (no more unresolved files)

  continue: hg evolve --continue

  $ hg evolve --continue

  evolving 10:fd41d25a3e90 "foobar to c"

  working directory is now at c5405d2da7a1

  $ hg glog

  @    12:c5405d2da7a1 foobar to c

  |\    () draft

  | o  11:31c317b7bdb1 foo to c

  | |   () draft

  o |  9:d0f84b25d4e3 bar to c

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg parents

  changeset:   12:c5405d2da7a1

  tag:         tip

  parent:      11:31c317b7bdb1

  parent:      9:d0f84b25d4e3

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     foobar to c

Testing a conlficting merge with second parent obsoleted

  $ hg up 31c317b7bdb1

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ echo foo > c

  $ hg amend

  1 new orphan changesets

  $ hg glog

  @  13:928097d0b5b5 foo to c

  |   () draft

  | *    12:c5405d2da7a1 foobar to c

  | |\    () draft

  +---x  11:31c317b7bdb1 foo to c

  | |     () draft

  | o  9:d0f84b25d4e3 bar to c

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg evolve --all

  move:[12] foobar to c

  atop:[13] foo to c

  merging c

  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')

  evolve failed!

  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort

  abort: unresolved merge conflicts (see hg help resolve)

  [255]

  $ echo foobar > c

  $ hg resolve -m

  (no more unresolved files)

  continue: hg evolve --continue

  $ hg evolve --continue

  evolving 12:c5405d2da7a1 "foobar to c"

  working directory is now at dc1948a6eeab

  $ hg glog

  @    14:dc1948a6eeab foobar to c

  |\    () draft

  | o  13:928097d0b5b5 foo to c

  | |   () draft

  o |  9:d0f84b25d4e3 bar to c

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

3) When stabilizing other changesets resulted in orphan merge changeset

-----------------------------------------------------------------------

  $ hg prune -r d0f84b25d4e3 -r 928097d0b5b5 -r dc1948a6eeab

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  working directory now at 8fa14d15e168

  3 changesets pruned

  $ for ch in l m; do echo foo > $ch; hg ci -Aqm "added "$ch; done;

  $ hg up 8fa14d15e168

  0 files updated, 0 files merged, 2 files removed, 0 files unresolved

  $ for ch in x y; do echo foo > $ch; hg ci -Aqm "added "$ch; done;

  $ hg glog

  @  18:863d11043c67 added y

  |   () draft

  o  17:3f2247835c1d added x

  |   () draft

  | o  16:e44dc179e7f5 added m

  | |   () draft

  | o  15:8634bee7bf1e added l

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg merge

  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg ci -m "merge commit"

  $ hg up 8634bee7bf1e

  0 files updated, 0 files merged, 3 files removed, 0 files unresolved

  $ echo bar > l

  $ hg amend

  2 new orphan changesets

  $ hg glog

  @  20:fccc9de66799 added l

  |   () draft

  | *    19:190763373d8b merge commit

  | |\    () draft

  | | o  18:863d11043c67 added y

  | | |   () draft

  +---o  17:3f2247835c1d added x

  | |     () draft

  | *  16:e44dc179e7f5 added m

  | |   () draft

  | x  15:8634bee7bf1e added l

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg evolve --all

  move:[16] added m

  atop:[20] added l

  move:[19] merge commit

  atop:[21] added m

  working directory is now at a446ad3e6700

  $ hg glog

  @    22:a446ad3e6700 merge commit

  |\    () draft

  | o  21:495d2039f8f1 added m

  | |   () draft

  | o  20:fccc9de66799 added l

  | |   () draft

  o |  18:863d11043c67 added y

  | |   () draft

  o |  17:3f2247835c1d added x

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

4) When both the parents of the merge changeset are obsolete with a succ

------------------------------------------------------------------------

  $ hg prune -r a446ad3e6700 -r 495d2039f8f1 -r 863d11043c67

  0 files updated, 0 files merged, 3 files removed, 0 files unresolved

  working directory now at fccc9de66799

  3 changesets pruned

  $ hg glog

  @  20:fccc9de66799 added l

  |   () draft

  | o  17:3f2247835c1d added x

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

  $ hg merge

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg ci -m "merged l and x"

  $ hg up fccc9de66799

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo foobar > l

  $ hg amend

  1 new orphan changesets

  $ hg up 3f2247835c1d

  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo bar > x

  $ hg amend

  $ hg glog

  @  25:cdf6547da25f added x

  |   () draft

  | o  24:3f371171d767 added l

  |/    () draft

  | *    23:7b78a9784f3e merged l and x

  | |\    () draft

  +---x  20:fccc9de66799 added l

  | |     () draft

  | x  17:3f2247835c1d added x

  |/    () draft

  o  0:8fa14d15e168 added hgignore

      () draft

XXX: We should handle this case too

  $ hg evolve --all

  warning: no support for evolving merge changesets with two obsolete parents yet

  (Redo the merge (7b78a9784f3e) and use `hg prune <old> --succ <new>` to obsolete the old one)