view tests/test-evolve-issue5881.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.

Test for issue 5881 present at https://bz.mercurial-scm.org/show_bug.cgi?id=5881
===============================================================================
which is about that if the working copy parent  is obsolete then evolve update
to its successor revision and stop; it doesn't continue to evolve remaining
revisions those were suppossed to evovle.

Setup
=====

  $ cat >> $HGRCPATH <<EOF
  > [phases]
  > publish = False
  > [alias]
  > glog = log -GT "{rev}:{node|short} {desc}\n ({bookmarks}) {phase}"
  > [extensions]
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

  $ hg init issue5881
  $ cd issue5881

Prepare the directory by creating an orphan and update to its obsolete parent:

  $ for ch in a b c; do echo $ch > $ch; hg ci -Am "added "$ch; done;
  adding a
  adding b
  adding c
  $ hg up 1 -q
  $ hg ci --amend -m "updated b"
  1 new orphan changesets
  $ hg up 1
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory parent is obsolete! (5f6d8a4bf34a)
  (use 'hg evolve' to update to its successor: e6048a693c0d)

  $ hg glog
  o  3:e6048a693c0d updated b
  |   () draft
  | *  2:155349b645be added c
  | |   () draft
  | @  1:5f6d8a4bf34a added b
  |/    () draft
  o  0:9092f1db7931 added a
      () draft

Test `hg evolve` evolve all the revisions specified by user:
  $ hg evolve -r .::
  update:[3] updated b
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  working directory is now at e6048a693c0d
  move:[2] added c
  atop:[3] updated b
  working directory is now at e6048a693c0d