view tests/test-evolve-issue5967.t @ 4689:27947b17cfaf stable

evolve: orphans that evolve into nothing don't need successors (issue5967)

When continuing to solve an orphan that created no changes (i.e. clean wdir),
_completeorphan() used to create an obsmarker that said that the result of that
orphan evolution is the currently checked out changeset. That's not a correct
obsmarker, because all of the orphan's changes were dropped and so it had no
effect on the currently checked out changeset.

This is an issue that has only existed when --continu'ing evolve, that's why
the fix touches _completeorphan(), but not _solveunstable(). This fix is
adapted from a similar "if node is None" block in _finalizerelocate().

hg evolve --continue and obsmarkers after conflict resolution with no changes to commit (issue5967)
https://bz.mercurial-scm.org/show_bug.cgi?id=5967

  $ . $TESTDIR/testlib/common.sh

  $ hg init issue5967
  $ cd issue5967
  $ cat > .hg/hgrc << EOF
  > [alias]
  > glog = log -GT "{rev}: {desc}"
  > [extensions]
  > evolve=
  > EOF

  $ echo apple > a
  $ hg ci -qAm 'apple'
  $ echo banana > a
  $ hg ci -m 'banana'

Amending revision 0 in a way that causes conflicts

  $ hg prev
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  [0] apple
  $ echo apricot > a
  $ hg amend -m 'apricot'
  1 new orphan changesets

  $ hg glog
  @  2: apricot
  
  *  1: banana
  |
  x  0: apple
  

Trying to evolve, then manually discarding changes from revision 1

  $ hg evolve
  move:[1] banana
  atop:[2] apricot
  merging a
  warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
  fix conflicts and see `hg help evolve.interrupted`
  [1]

  $ echo apricot > a
  $ hg resolve --mark a
  (no more unresolved files)
  continue: hg evolve --continue

This will correctly notice that revision 1 can be dropped

  $ hg evolve --continue
  evolving 1:dd9b5dd30cd6 "banana"
  evolution of 1:dd9b5dd30cd6 created no changes to commit
  working directory is now at 4d6fec23dcc4
  $ hg glog
  @  2: apricot
  

This is important: 1 should not have a successor (especially not revision 2)

  $ hg olog --all
  @  4d6fec23dcc4 (2) apricot
  |
  x  3ba7db0ce860 (0) apple
       rewritten(description, content) as 4d6fec23dcc4 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
  
  $ hg olog --hidden --all 1
  x  dd9b5dd30cd6 (1) banana
       pruned using evolve by test (Thu Jan 01 00:00:00 1970 +0000)