prev: jump to parent's successor if parent is obsolete and topic is involved
`hg stack` shows a linear chain of commits even when they are not linear chain
and some changesets are obsoleted and have successors as separate head. This is
very nice to have a post evolution view of the stack. However when `hg prev` is
run on an unstable changeset whose parent is obsolete and does not topic but
parents successor has the topic, it shows no parent on the topic.
This patch makes `hg prev` update to parent's successor and make things follow
the stack order.
====================================
Testing head checking code: Case D-1
====================================
Mercurial checks for the introduction of new heads on push. Evolution comes
into play to detect if existing branches on the server are being replaced by
some of the new one we push.
This case is part of a series of tests checking this behavior.
Category D: remote head is "obs-affected" locally, but result is not part of the push
TestCase 1: remote head is rewritten, but successors is not part of the push
.. old-state:
..
.. * 1 changeset branch
..
.. new-state:
..
.. * 1 changeset branch succeeding the old branch
.. * 1 new unrelated branch
..
.. expected-result:
..
.. * pushing only the unrelated branch: denied
..
.. graph-summary:
..
.. A ø⇠○ A'
.. |/
.. | ◔ B
.. |/
.. ●
$ . $TESTDIR/testlib/push-checkheads-util.sh
Test setup
----------
$ mkdir D1
$ cd D1
$ setuprepos
creating basic server and client repo
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd client
$ hg up 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ mkcommit A1
created new head
$ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
obsoleted 1 changesets
$ hg up 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ mkcommit B0
created new head
$ hg log -G --hidden
@ 74ff5441d343 (draft): B0
|
| o f6082bc4ffef (draft): A1
|/
| x 8aaa48160adc (draft): A0
|/
o 1e4be0697311 (public): root
Actual testing
--------------
$ hg push -r 'desc(B0)'
pushing to $TESTTMP/D1/server (glob)
searching for changes
abort: push creates new remote head 74ff5441d343!
(merge or see 'hg help push' for details about pushing new heads)
[255]
$ cd ../..