view tests/test-evolve-issue6097.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.

Orphan changeset and trying to relocate a node on top of itself (issue6097)
https://bz.mercurial-scm.org/show_bug.cgi?id=6097

  $ . $TESTDIR/testlib/common.sh

  $ cat << EOF >> $HGRCPATH
  > [extensions]
  > rebase =
  > evolve =
  > EOF

  $ hg init issue6097
  $ cd issue6097

  $ echo apricot > a
  $ hg ci -qAm apricot

  $ echo banana > b
  $ hg ci -qAm banana

Let's go back to amend 0 and make an orphan out of 1

  $ hg up -q 0
  $ echo coconut > c
  $ hg add -q c
  $ hg ci --amend -m 'apricot and coconut'
  1 new orphan changesets

Now rebase the successor of 0 on top of 1

  $ hg rebase -r . -d 1
  rebasing 2:32acf8fb1b23 "apricot and coconut" (tip)
  1 new orphan changesets

Pruning 1 just to get it out of the way

  $ hg prune -q 1

Note how both the regular DAG and the obsolescence graph are linear, but the
paths from 3 to 0 are different: 3-1-0 and 3-2-0

  $ hg log -G
  @  changeset:   3:2868fe6df617
  |  tag:         tip
  |  parent:      1:e0486f65907d
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  instability: orphan
  |  summary:     apricot and coconut
  |
  x  changeset:   1:e0486f65907d
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  obsolete:    pruned using prune
  |  summary:     banana
  |
  x  changeset:   0:692cc7b6212c
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     obsolete:    rewritten using amend, rebase as 3:2868fe6df617
     summary:     apricot
  

  $ hg debugobsolete
  692cc7b6212c102a9eafcf04ed2e4bfca5023754 32acf8fb1b2325c727135dcd65153745a031a125 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
  32acf8fb1b2325c727135dcd65153745a031a125 2868fe6df617a3045cf668e4ab1c486a8692abd1 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '12', 'operation': 'rebase', 'user': 'test'}
  e0486f65907dac7107e72a247386845e6a9fd83b 0 {692cc7b6212c102a9eafcf04ed2e4bfca5023754} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
  $ hg obslog
  @  2868fe6df617 (3) apricot and coconut
  |    rewritten(parent, content) from 32acf8fb1b23 using rebase by test (Thu Jan 01 00:00:00 1970 +0000)
  |
  x  32acf8fb1b23 (2) apricot and coconut
  |    rewritten(description, content) from 692cc7b6212c using amend by test (Thu Jan 01 00:00:00 1970 +0000)
  |
  x  692cc7b6212c (0) apricot
  

  $ hg evolve -r .
  move:[3] apricot and coconut
  atop:[-1] 
  working directory is now at bb847d1d3a5f

  $ hg log -G
  @  changeset:   4:bb847d1d3a5f
     tag:         tip
     parent:      -1:000000000000
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     apricot and coconut
  

  $ hg debugobsolete
  692cc7b6212c102a9eafcf04ed2e4bfca5023754 32acf8fb1b2325c727135dcd65153745a031a125 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
  32acf8fb1b2325c727135dcd65153745a031a125 2868fe6df617a3045cf668e4ab1c486a8692abd1 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '12', 'operation': 'rebase', 'user': 'test'}
  e0486f65907dac7107e72a247386845e6a9fd83b 0 {692cc7b6212c102a9eafcf04ed2e4bfca5023754} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'prune', 'user': 'test'}
  2868fe6df617a3045cf668e4ab1c486a8692abd1 bb847d1d3a5f3de90f4fd5e845b69d848568401a 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '4', 'operation': 'evolve', 'user': 'test'}
  $ hg obslog
  @  bb847d1d3a5f (4) apricot and coconut
  |    rebased(parent) from 2868fe6df617 using evolve by test (Thu Jan 01 00:00:00 1970 +0000)
  |
  x  2868fe6df617 (3) apricot and coconut
  |    rewritten(parent, content) from 32acf8fb1b23 using rebase by test (Thu Jan 01 00:00:00 1970 +0000)
  |
  x  32acf8fb1b23 (2) apricot and coconut
  |    rewritten(description, content) from 692cc7b6212c using amend by test (Thu Jan 01 00:00:00 1970 +0000)
  |
  x  692cc7b6212c (0) apricot