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).
Tests for the --stop flag for `hg evolve` command while resolving phase-divergence
==================================================================================
The `--stop` flag stops the interrupted evolution and delete the state file so
user can do other things and comeback and do evolution later on
This is testing cases when `hg evolve` command is doing phase-divergence resolution.
Setup
=====
$ cat >> $HGRCPATH <<EOF
> [alias]
> glog = log -GT "{rev}:{node|short} {desc}\n ({bookmarks}) {phase}"
> [extensions]
> EOF
$ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH
$ hg init stoprepo
$ cd stoprepo
$ echo ".*\.orig" > .hgignore
$ hg add .hgignore
$ hg ci -m "added hgignore"
$ for ch in a b c d; do echo foo > $ch; hg add $ch; hg ci -qm "added "$ch; done;
$ hg glog
@ 4:c41c793e0ef1 added d
| () draft
o 3:ca1b80f7960a added c
| () draft
o 2:b1661037fa25 added b
| () draft
o 1:c7586e2a9264 added a
| () draft
o 0:8fa14d15e168 added hgignore
() draft
Creating phase divergence, resolution of which will lead to conflicts
----------------------------------------------------------------------
$ hg up .^^^
0 files updated, 0 files merged, 3 files removed, 0 files unresolved
$ hg pick -r .~-3
picking 4:c41c793e0ef1 "added d"
$ echo foobar > c
$ hg add c
$ hg amend
$ hg glog --hidden
@ 6:ddba58020bc0 added d
| () draft
| x 5:cfe30edc6125 added d
|/ () draft
| x 4:c41c793e0ef1 added d
| | () draft
| o 3:ca1b80f7960a added c
| | () draft
| o 2:b1661037fa25 added b
|/ () draft
o 1:c7586e2a9264 added a
| () draft
o 0:8fa14d15e168 added hgignore
() draft
$ hg phase -r c41c793e0ef1 --public --hidden
1 new phase-divergent changesets
$ hg glog
@ 6:ddba58020bc0 added d
| () draft
| o 4:c41c793e0ef1 added d
| | () public
| o 3:ca1b80f7960a added c
| | () public
| o 2:b1661037fa25 added b
|/ () public
o 1:c7586e2a9264 added a
| () public
o 0:8fa14d15e168 added hgignore
() public
$ hg evolve --phase-divergent
recreate:[6] added d
atop:[4] added d
rebasing to destination parent: ca1b80f7960a
merging c
warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
unresolved merge conflicts
(see 'hg help evolve.interrupted')
[1]
$ hg evolve --stop
stopped the interrupted evolve
working directory is now at ca1b80f7960a
XXX: maybe we should update wdir to where it was
$ hg glog
* 6:ddba58020bc0 added d
| () draft
| o 4:c41c793e0ef1 added d
| | () public
| @ 3:ca1b80f7960a added c
| | () public
| o 2:b1661037fa25 added b
|/ () public
o 1:c7586e2a9264 added a
| () public
o 0:8fa14d15e168 added hgignore
() public