view tests/test-evolve-issue5966.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.

Testing evolve --continue with unresolved conflicts (issue5966)
https://bz.mercurial-scm.org/show_bug.cgi?id=5966

  $ . $TESTDIR/testlib/common.sh

  $ hg init issue5966
  $ cd issue5966
  $ cat > .hg/hgrc << EOF
  > [phases]
  > publish = false
  > [alias]
  > glog = log -GT "{rev}: {desc}"
  > [extensions]
  > evolve=
  > EOF

  $ touch a
  $ hg ci -Aqm 'empty'

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

  $ hg glog
  @  3: coconut
  |
  o  2: banana
  |
  o  1: apple
  |
  o  0: empty
  

  $ hg up -q 1

Amending revision 1 in a way that causes conflicts

  $ echo apricot > a
  $ hg amend -m 'apricot'
  2 new orphan changesets

  $ hg glog --hidden
  @  4: apricot
  |
  | *  3: coconut
  | |
  | *  2: banana
  | |
  | x  1: apple
  |/
  o  0: empty
  

  $ hg evolve -t :fail --rev 'first(orphan())'
  move:[2] banana
  atop:[4] apricot
  unresolved merge conflicts
  (see 'hg help evolve.interrupted')
  [1]
  $ hg evolve --list
  34a690fcf6ab: banana
    orphan: 7f59f18ca4a9 (obsolete parent)
  
  feb8c0bffa1f: coconut
    orphan: 34a690fcf6ab (orphan parent)
  
Evolve should detect unresolved conflict.

  $ hg resolve --list
  U a
  $ hg evolve --continue
  abort: unresolved merge conflicts (see 'hg help resolve')
  [255]

(even when ran twice)

  $ hg evolve --continue
  abort: unresolved merge conflicts (see 'hg help resolve')
  [255]

  $ cat a
  apricot
  $ hg resolve --list
  U a
  $ hg resolve a -t :other
  (no more unresolved files)
  continue: hg evolve --continue
  $ hg resolve --list
  R a
  $ hg evolve --continue
  evolving 2:34a690fcf6ab "banana"
  working directory is now at 581a2bb4704c
  $ hg resolve --list

evolve the rest of the stack

  $ hg evolve
  move:[3] coconut
  atop:[5] banana
  merging a

All commit evolved

  $ hg glog
  o  6: coconut
  |
  o  5: banana
  |
  @  4: apricot
  |
  o  0: empty