rebase: don't use rebased node as dirstate p2 (BC)
When rebasing a node, we currently use the rebased node as p2 in the
dirstate until just before we commit it (we then change to the desired
parents). This p2 is visible to the user when the rebase gets
interrupted because of merge conflicts. That can be useful to the user
as a reminder of which commit is currently being rebased, but I
believe it's incorrect for a few reasons:
* I think the dirstate parents should be the ones that will be set
when the commit is created.
* I think having two parents means that you're merging those two
commits, but when rebasing, you're generally grafting, not merging.
* When rebasing a merge commit, we should use the two desired parents
as dirstate parents (and we clearly can't have the rebased node as
a third dirstate parent).
* `hg graft` (and `hg update --merge`) sets only one parent and `hg
rebase` should be consistent with that.
I realize that this is a somewhat large user-visible change, but I
think it's worth it because it will simplify things quite a bit.
Differential Revision: https://phab.mercurial-scm.org/D7827
$ cat >> $HGRCPATH <<EOF
> [extensions]
> rebase=
> drawdag=$TESTDIR/drawdag.py
>
> [phases]
> publish=False
>
> [alias]
> tglog = log -G --template "{rev}:{phase} '{desc}' {branches} {bookmarks}\n"
> EOF
$ hg init a
$ cd a
$ echo c1 >common
$ hg add common
$ hg ci -m C1
$ echo c2 >>common
$ hg ci -m C2
$ echo c3 >>common
$ hg ci -m C3
$ hg up -q -C 1
$ echo l1 >>extra
$ hg add extra
$ hg ci -m L1
created new head
$ sed -e 's/c2/l2/' common > common.new
$ mv common.new common
$ hg ci -m L2
$ echo l3 >> extra2
$ hg add extra2
$ hg ci -m L3
$ hg bookmark mybook
$ hg phase --force --secret 4
$ hg tglog
@ 5:secret 'L3' mybook
|
o 4:secret 'L2'
|
o 3:draft 'L1'
|
| o 2:draft 'C3'
|/
o 1:draft 'C2'
|
o 0:draft 'C1'
Try to call --continue:
$ hg rebase --continue
abort: no rebase in progress
[255]
Conflicting rebase:
$ hg rebase -s 3 -d 2
rebasing 3:3163e20567cc "L1"
rebasing 4:46f0b057b5c0 "L2"
merging common
warning: conflicts while merging common! (edit, then use 'hg resolve --mark')
unresolved conflicts (see hg resolve, then hg rebase --continue)
[1]
$ hg status --config commands.status.verbose=1
M common
? common.orig
# The repository is in an unfinished *rebase* state.
# Unresolved merge conflicts:
#
# common
#
# To mark files as resolved: hg resolve --mark FILE
# To continue: hg rebase --continue
# To abort: hg rebase --abort
# To stop: hg rebase --stop
Try to continue without solving the conflict:
$ hg rebase --continue
abort: unresolved merge conflicts (see 'hg help resolve')
[255]
Conclude rebase:
$ echo 'resolved merge' >common
$ hg resolve -m common
(no more unresolved files)
continue: hg rebase --continue
$ hg rebase --continue
already rebased 3:3163e20567cc "L1" as 3e046f2ecedb
rebasing 4:46f0b057b5c0 "L2"
rebasing 5:8029388f38dc "L3" (mybook)
saved backup bundle to $TESTTMP/a/.hg/strip-backup/3163e20567cc-5ca4656e-rebase.hg
$ hg tglog
@ 5:secret 'L3' mybook
|
o 4:secret 'L2'
|
o 3:draft 'L1'
|
o 2:draft 'C3'
|
o 1:draft 'C2'
|
o 0:draft 'C1'
Check correctness:
$ hg cat -r 0 common
c1
$ hg cat -r 1 common
c1
c2
$ hg cat -r 2 common
c1
c2
c3
$ hg cat -r 3 common
c1
c2
c3
$ hg cat -r 4 common
resolved merge
$ hg cat -r 5 common
resolved merge
Bookmark stays active after --continue
$ hg bookmarks
* mybook 5:d67b21408fc0
$ cd ..
Check that the right ancestors is used while rebasing a merge (issue4041)
$ hg init issue4041
$ cd issue4041
$ hg unbundle "$TESTDIR/bundles/issue4041.hg"
adding changesets
adding manifests
adding file changes
added 11 changesets with 8 changes to 3 files (+1 heads)
new changesets 24797d4f68de:2f2496ddf49d (11 drafts)
(run 'hg heads' to see heads)
$ hg up default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -G
o changeset: 10:2f2496ddf49d
|\ branch: f1
| | tag: tip
| | parent: 7:4c9fbe56a16f
| | parent: 9:e31216eec445
| | user: szhang
| | date: Thu Sep 05 12:59:39 2013 -0400
| | summary: merge
| |
| o changeset: 9:e31216eec445
| | branch: f1
| | user: szhang
| | date: Thu Sep 05 12:59:10 2013 -0400
| | summary: more changes to f1
| |
| o changeset: 8:8e4e2c1a07ae
| |\ branch: f1
| | | parent: 2:4bc80088dc6b
| | | parent: 6:400110238667
| | | user: szhang
| | | date: Thu Sep 05 12:57:59 2013 -0400
| | | summary: bad merge
| | |
o | | changeset: 7:4c9fbe56a16f
|/ / branch: f1
| | parent: 2:4bc80088dc6b
| | user: szhang
| | date: Thu Sep 05 12:54:00 2013 -0400
| | summary: changed f1
| |
| o changeset: 6:400110238667
| | branch: f2
| | parent: 4:12e8ec6bb010
| | user: szhang
| | date: Tue Sep 03 13:58:02 2013 -0400
| | summary: changed f2 on f2
| |
| | @ changeset: 5:d79e2059b5c0
| | | parent: 3:8a951942e016
| | | user: szhang
| | | date: Tue Sep 03 13:57:39 2013 -0400
| | | summary: changed f2 on default
| | |
| o | changeset: 4:12e8ec6bb010
| |/ branch: f2
| | user: szhang
| | date: Tue Sep 03 13:57:18 2013 -0400
| | summary: created f2 branch
| |
| o changeset: 3:8a951942e016
| | parent: 0:24797d4f68de
| | user: szhang
| | date: Tue Sep 03 13:57:11 2013 -0400
| | summary: added f2.txt
| |
o | changeset: 2:4bc80088dc6b
| | branch: f1
| | user: szhang
| | date: Tue Sep 03 13:56:20 2013 -0400
| | summary: added f1.txt
| |
o | changeset: 1:ef53c9e6b608
|/ branch: f1
| user: szhang
| date: Tue Sep 03 13:55:26 2013 -0400
| summary: created f1 branch
|
o changeset: 0:24797d4f68de
user: szhang
date: Tue Sep 03 13:55:08 2013 -0400
summary: added default.txt
$ hg rebase -s9 -d2 --debug # use debug to really check merge base used
rebase onto 4bc80088dc6b starting from e31216eec445
rebasing on disk
rebase status stored
rebasing 9:e31216eec445 "more changes to f1"
future parents are 2 and -1
update to 2:4bc80088dc6b
resolving manifests
branchmerge: False, force: True, partial: False
ancestor: d79e2059b5c0+, local: d79e2059b5c0+, remote: 4bc80088dc6b
f2.txt: other deleted -> r
removing f2.txt
f1.txt: remote created -> g
getting f1.txt
merge against 9:e31216eec445
detach base 8:8e4e2c1a07ae
resolving manifests
branchmerge: True, force: True, partial: False
ancestor: 8e4e2c1a07ae, local: 4bc80088dc6b+, remote: e31216eec445
f1.txt: remote is newer -> g
getting f1.txt
committing files:
f1.txt
committing manifest
committing changelog
updating the branch cache
rebased as 19c888675e13
rebase status stored
rebasing 10:2f2496ddf49d "merge" (tip)
future parents are 11 and 7
already in destination
merge against 10:2f2496ddf49d
detach base 9:e31216eec445
resolving manifests
branchmerge: True, force: True, partial: False
ancestor: e31216eec445, local: 19c888675e13+, remote: 2f2496ddf49d
f1.txt: remote is newer -> g
getting f1.txt
committing files:
f1.txt
committing manifest
committing changelog
updating the branch cache
rebased as 2a7f09cac94c
rebase status stored
rebase merging completed
update back to initial working directory parent
resolving manifests
branchmerge: False, force: False, partial: False
ancestor: 2a7f09cac94c, local: 2a7f09cac94c+, remote: d79e2059b5c0
f1.txt: other deleted -> r
removing f1.txt
f2.txt: remote created -> g
getting f2.txt
2 changesets found
list of changesets:
e31216eec445e44352c5f01588856059466a24c9
2f2496ddf49d69b5ef23ad8cf9fb2e0e4faf0ac2
bundle2-output-bundle: "HG20", (1 params) 3 parts total
bundle2-output-part: "changegroup" (params: 1 mandatory 1 advisory) streamed payload
bundle2-output-part: "cache:rev-branch-cache" (advisory) streamed payload
bundle2-output-part: "phase-heads" 24 bytes payload
saved backup bundle to $TESTTMP/issue4041/.hg/strip-backup/e31216eec445-15f7a814-rebase.hg
3 changesets found
list of changesets:
4c9fbe56a16f30c0d5dcc40ec1a97bbe3325209c
19c888675e133ab5dff84516926a65672eaf04d9
2a7f09cac94c7f4b73ebd5cd1a62d3b2e8e336bf
bundle2-output-bundle: "HG20", 3 parts total
bundle2-output-part: "changegroup" (params: 1 mandatory 1 advisory) streamed payload
bundle2-output-part: "cache:rev-branch-cache" (advisory) streamed payload
bundle2-output-part: "phase-heads" 24 bytes payload
adding branch
bundle2-input-bundle: with-transaction
bundle2-input-part: "changegroup" (params: 1 mandatory 1 advisory) supported
adding changesets
add changeset 4c9fbe56a16f
add changeset 19c888675e13
add changeset 2a7f09cac94c
adding manifests
adding file changes
adding f1.txt revisions
bundle2-input-part: total payload size 1686
bundle2-input-part: "cache:rev-branch-cache" (advisory) supported
bundle2-input-part: total payload size 74
truncating cache/rbc-revs-v1 to 56
bundle2-input-part: "phase-heads" supported
bundle2-input-part: total payload size 24
bundle2-input-bundle: 3 parts total
added 2 changesets with 2 changes to 1 files
updating the branch cache
invalid branch cache (served): tip differs
invalid branch cache (served.hidden): tip differs
rebase completed
Test minimization of merge conflicts
$ hg up -q null
$ echo a > a
$ hg add a
$ hg commit -q -m 'a'
$ echo b >> a
$ hg commit -q -m 'ab'
$ hg bookmark ab
$ hg up -q '.^'
$ echo b >> a
$ echo c >> a
$ hg commit -q -m 'abc'
$ hg rebase -s 7bc217434fc1 -d ab --keep
rebasing 13:7bc217434fc1 "abc" (tip)
merging a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
unresolved conflicts (see hg resolve, then hg rebase --continue)
[1]
$ hg diff
diff -r 328e4ab1f7cc a
--- a/a Thu Jan 01 00:00:00 1970 +0000
+++ b/a * (glob)
@@ -1,2 +1,6 @@
a
b
+<<<<<<< dest: 328e4ab1f7cc ab - test: ab
+=======
+c
+>>>>>>> source: 7bc217434fc1 - test: abc
$ hg rebase --abort
rebase aborted
$ hg up -q -C 7bc217434fc1
$ hg rebase -s . -d ab --keep -t internal:merge3
rebasing 13:7bc217434fc1 "abc" (tip)
merging a
warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
unresolved conflicts (see hg resolve, then hg rebase --continue)
[1]
$ hg diff
diff -r 328e4ab1f7cc a
--- a/a Thu Jan 01 00:00:00 1970 +0000
+++ b/a * (glob)
@@ -1,2 +1,8 @@
a
+<<<<<<< dest: 328e4ab1f7cc ab - test: ab
b
+||||||| base
+=======
+b
+c
+>>>>>>> source: 7bc217434fc1 - test: abc
Test rebase with obsstore turned on and off (issue5606)
$ cd $TESTTMP
$ hg init b
$ cd b
$ hg debugdrawdag <<'EOS'
> D
> |
> C
> |
> B E
> |/
> A
> EOS
$ hg update E -q
$ echo 3 > B
$ hg commit --amend -m E -A B -q
$ hg rebase -r B+D -d . --config experimental.evolution=true
rebasing 1:112478962961 "B" (B)
merging B
warning: conflicts while merging B! (edit, then use 'hg resolve --mark')
unresolved conflicts (see hg resolve, then hg rebase --continue)
[1]
$ echo 4 > B
$ hg resolve -m
(no more unresolved files)
continue: hg rebase --continue
$ hg rebase --continue --config experimental.evolution=none
rebasing 1:112478962961 "B" (B)
rebasing 3:f585351a92f8 "D" (D)
warning: orphaned descendants detected, not stripping 112478962961
saved backup bundle to $TESTTMP/b/.hg/strip-backup/f585351a92f8-e536a9e4-rebase.hg
$ rm .hg/localtags
$ hg tglog
o 5:draft 'D'
|
o 4:draft 'B'
|
@ 3:draft 'E'
|
| o 2:draft 'C'
| |
| o 1:draft 'B'
|/
o 0:draft 'A'
Test where the conflict happens when rebasing a merge commit
$ cd $TESTTMP
$ hg init conflict-in-merge
$ cd conflict-in-merge
$ hg debugdrawdag <<'EOS'
> F # F/conflict = foo\n
> |\
> D E
> |/
> C B # B/conflict = bar\n
> |/
> A
> EOS
$ hg co F
5 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg rebase -d B
rebasing 2:dc0947a82db8 "C" (C)
rebasing 3:e7b3f00ed42e "D" (D)
rebasing 4:03ca77807e91 "E" (E)
rebasing 5:9a6b91dc2044 "F" (F tip)
merging conflict
warning: conflicts while merging conflict! (edit, then use 'hg resolve --mark')
unresolved conflicts (see hg resolve, then hg rebase --continue)
[1]
$ hg tglog
@ 8:draft 'E'
|
| @ 7:draft 'D'
|/
o 6:draft 'C'
|
| % 5:draft 'F'
| |\
| | o 4:draft 'E'
| | |
| o | 3:draft 'D'
| |/
| o 2:draft 'C'
| |
o | 1:draft 'B'
|/
o 0:draft 'A'
$ echo baz > conflict
$ hg resolve -m
(no more unresolved files)
continue: hg rebase --continue
$ hg rebase -c
already rebased 2:dc0947a82db8 "C" (C) as 0199610c343e
already rebased 3:e7b3f00ed42e "D" (D) as f0dd538aaa63
already rebased 4:03ca77807e91 "E" (E) as cbf25af8347d
rebasing 5:9a6b91dc2044 "F" (F)
saved backup bundle to $TESTTMP/conflict-in-merge/.hg/strip-backup/dc0947a82db8-ca7e7d5b-rebase.hg
$ hg tglog
@ 5:draft 'F'
|\
| o 4:draft 'E'
| |
o | 3:draft 'D'
|/
o 2:draft 'C'
|
o 1:draft 'B'
|
o 0:draft 'A'