evolve: add comptability to read old evolvestate files
When a user runs `hg evolve` with old evolve where we used to write evolvestate
the old ways i.e. without using cbor, and faces conflicts, the evolve is
interrupted. If the user updates evolve before completing the evolve, that can
result in traceback as the new evolve cannot read the old evolvestate file.
The previous patch added function to read old evolvestate file and this patch
uses that when we encounter the above mentioned case.
This test file test the #5720 issue
Check that `hg evolve --continue` doesn't change changeset phase from secret
to draft after a merge conflict.
https://bz.mercurial-scm.org/show_bug.cgi?id=5720
Global setup
============
$ . $TESTDIR/testlib/common.sh
$ cat >> $HGRCPATH <<EOF
> [ui]
> interactive = true
> [phases]
> publish=False
> [extensions]
> evolve =
> EOF
Test
====
$ hg init $TESTTMP/issue-5720
$ cd $TESTTMP/issue-5720
Create two drafts commits and one secret
$ echo a > a
$ hg commit -Am a
adding a
$ echo b > a
$ hg commit -m b
$ echo c > a
$ hg commit --secret -m c
$ hg log -G -T "{rev}: {phase}"
@ 2: secret
|
o 1: draft
|
o 0: draft
Amend the second draft with new content
$ hg prev
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
[1] b
$ echo b2 > a
$ hg amend
1 new orphan changesets
$ hg log -G -T "{rev}: {phase}"
@ 3: draft
|
| * 2: secret
| |
| x 1: draft
|/
o 0: draft
Evolve which triggers a conflict
$ hg evolve
move:[2] c
atop:[3] b
merging a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
evolve failed!
fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort
abort: unresolved merge conflicts (see hg help resolve)
[255]
Fix the conflict
$ echo c2 > a
$ hg resolve -m
(no more unresolved files)
continue: hg evolve --continue
Continue the evolution
$ hg evolve --continue
evolving 2:13833940840c "c"
working directory is now at 3d2080c198e5
Tip should stay in secret phase
$ hg log -G -T "{rev}: {phase}"
@ 4: secret
|
o 3: draft
|
o 0: draft
$ hg log -r . -T '{phase}\n'
secret