view tests/test-evolve-issue5881.t @ 6935:954d7ea5cd67 stable tip

stack: when stack base is obsolete, pick any successor, even if at random

There are situations when s0 is obsolete and we also cannot pick just one
successor for it to use in stack. In such a case, let's pick the "latest"
successor from the first set.

We're assuming that obsutil.successorssets() returns data in the same order (it
should, since it makes sure to sort data internally). Keeping that in mind,
while the successor picked for s0 by this code is not based on any sort of
sophisticated logic, it should nonetheless be the same every time.

This patch is probably not going to completely break anything that was
previously working fine, because the previous behavior was to just abort with
an exception.

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which is about that if the working copy parent  is obsolete then evolve update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
=====

  $ . $TESTDIR/testlib/common.sh

  $ cat >> $HGRCPATH <<EOF
  > [phases]
  > publish = False
  > [extensions]
  > evolve =
  > EOF

  $ 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  working directory parent is obsolete!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 orphan
  | @  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