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tests/test-evolve-issue5967.t
author Martin von Zweigbergk <martinvonz@google.com>
Mon, 09 Dec 2019 11:09:11 -0800
changeset 5343 ebfd0d875600
parent 5323 417503ef667d
child 5349 e8660b28bfee
permissions -rw-r--r--
evolve: handle relocation during divergence resolution producing no changes When resolving divergence and the two divergent commits have different parents, we start by rebasing one of them to have the same parent as the other. That step can result in no changes to commit. When it does, we would crash with a TypeError before this patch. This patch fixes it by instead creating an empty commit in that scenario. The existing code then continues to attempt to merge it, which produces no changes, and no commit is created on top. The other side of the divergence is marked as successor as usual, so orphans from the side that became empty will be evolved to the right place (see test).

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')
  unresolved merge conflicts
  (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 debugobsolete
  3ba7db0ce860a189d1fd1fd7675f0e871652ed16 4d6fec23dcc4c3e4ccce8b1d3b79f62ee927c2be 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '9', 'operation': 'amend', 'user': 'test'}
  dd9b5dd30cd6b703d126d55b34165fd6ec5717c9 0 {3ba7db0ce860a189d1fd1fd7675f0e871652ed16} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'evolve', 'user': 'test'}
  $ 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)
evolve