view tests/test-evolve-issue5881.t @ 4728:ef8907df73fc stable

touch: fix the inconsistent behavior of divergence catching logic (issue6107)

When touching a node, the way we check if it can lead to divergence
is we look at the successors sets of the rev being touched. And if
there is successor revs exists (excluding the case when that successor
set is (A,) for rev A) that means there will be divergence and we warn
the user.
This works fine but there is still a case (which is not covered by looking
at successor sets) which can lead to divergence.

That case is: when there is already a revision exists which is divergent
to the revision being touched. And performing the touch would revive
that "dead" divergence. (Dead because one of the revision is obsolete which
is the one we are touching)

And to see if there is any rev which is divergent to a particular rev
we already have a function which we can use here
i.e. `evolvecmd.divergentsets(repo, ctx_being_touched)`

Changes in test file demonstrate the fixed behaviour.

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which is about that if the working copy parent  is obsolete then evolve update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  working directory parent is obsolete!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