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).
Testing obslog and other commands accessing obsolete revisions.
Global setup
============
$ . $TESTDIR/testlib/obshistory_setup.sh
Test output with split commit
=============================
Test setup
----------
$ hg init $TESTTMP/local-split
$ hg init $TESTTMP/server
$ cd $TESTTMP/local-split
$ mkcommit ROOT
$ sync
$ echo 42 >> a
$ echo 43 >> b
$ hg commit -A -m "A0"
adding a
adding b
$ hg log --hidden -G
@ changeset: 1:471597cad322
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A0
|
o changeset: 0:ea207398892e
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ROOT
$ hg split -r 'desc(A0)' -n "testing split" -d "0 0" << EOF
> y
> y
> n
> y
> y
> y
> EOF
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
adding a
adding b
diff --git a/a b/a
new file mode 100644
examine changes to 'a'?
(enter ? for help) [Ynesfdaq?] y
@@ -0,0 +1,1 @@
+42
record change 1/2 to 'a'?
(enter ? for help) [Ynesfdaq?] y
diff --git a/b b/b
new file mode 100644
examine changes to 'b'?
(enter ? for help) [Ynesfdaq?] n
created new head
continue splitting? [Ycdq?] y
diff --git a/b b/b
new file mode 100644
examine changes to 'b'?
(enter ? for help) [Ynesfdaq?] y
@@ -0,0 +1,1 @@
+43
record this change to 'b'?
(enter ? for help) [Ynesfdaq?] y
no more change to split
$ sync
$ hg log --hidden -G
@ changeset: 3:f257fde29c7a
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A0
|
o changeset: 2:337fec4d2edc
| parent: 0:ea207398892e
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A0
|
| x changeset: 1:471597cad322
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| obsolete: split using split as 2:337fec4d2edc, 3:f257fde29c7a
| summary: A0
|
o changeset: 0:ea207398892e
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ROOT
Check output on the client side
-------------------------------
Check that obslog on split commit shows both targets
$ hg obslog 471597cad322 --hidden --patch
x 471597cad322 (1) A0
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, too many successors (2))
$ hg obslog 471597cad322 --hidden --no-graph -Tjson | python -m json.tool
[
{
"markers": [
{
"dates": [
[
*, (glob)
0
]
],
"effects": [
"parent",
"content"
],
"notes": [
"testing split"
],
"operations": [
"split"
],
"succnodes": [
"337fec4d2edcf0e7a467e35f818234bc620068b5",
"f257fde29c7a847c9b607f6e958656d0df0fb15c"
],
"users": [
"test"
],
"verb": "split"
}
],
"node": "471597cad322d1f659bb169751be9133dad92ef3",
"shortdescription": "A0"
}
]
Check that obslog on the first successor after split shows the revision plus
the split one
$ hg obslog 337fec4d2edc --patch
o 337fec4d2edc (2) A0
|
x 471597cad322 (1) A0
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, too many successors (2))
With the all option, it should show all three changesets
$ hg obslog --all 337fec4d2edc --patch
o 337fec4d2edc (2) A0
|
| @ f257fde29c7a (3) A0
|/
x 471597cad322 (1) A0
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, too many successors (2))
Check that obslog on the second successor after split shows the revision plus
the split one
$ hg obslog f257fde29c7a --patch
@ f257fde29c7a (3) A0
|
x 471597cad322 (1) A0
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, too many successors (2))
With the all option, it should show all three changesets
$ hg obslog f257fde29c7a --all --patch
o 337fec4d2edc (2) A0
|
| @ f257fde29c7a (3) A0
|/
x 471597cad322 (1) A0
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, too many successors (2))
Obslog with all option all should also works on the split commit
$ hg obslog -a 471597cad322 --hidden --patch
o 337fec4d2edc (2) A0
|
| @ f257fde29c7a (3) A0
|/
x 471597cad322 (1) A0
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, too many successors (2))
Check that obslog on both successors after split shows a coherent graph
$ hg obslog 'f257fde29c7a+337fec4d2edc' --patch
o 337fec4d2edc (2) A0
|
| @ f257fde29c7a (3) A0
|/
x 471597cad322 (1) A0
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, too many successors (2))
$ hg update 471597cad322
abort: hidden revision '471597cad322' was split as: 337fec4d2edc, f257fde29c7a!
(use --hidden to access hidden revisions)
[255]
$ hg update --hidden 'min(desc(A0))'
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to hidden changeset 471597cad322
(hidden revision '471597cad322' was split as: 337fec4d2edc, f257fde29c7a)
working directory parent is obsolete! (471597cad322)
(use 'hg evolve' to update to its tipmost successor: 337fec4d2edc, f257fde29c7a)
Check output on the server side
-------------------------------
$ hg obslog -R $TESTTMP/server --patch tip
o f257fde29c7a (2) A0
|
x 471597cad322
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, context is not local)
$ hg obslog -R $TESTTMP/server -f --patch tip
o f257fde29c7a (2) A0
$ hg obslog -R $TESTTMP/server --all --patch tip
o 337fec4d2edc (1) A0
|
| o f257fde29c7a (2) A0
|/
x 471597cad322
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, context is not local)
$ hg obslog -R $TESTTMP/server --all -f --patch tip
o 337fec4d2edc (1) A0
o f257fde29c7a (2) A0
$ hg obslog -R $TESTTMP/server --no-graph --all --patch tip
f257fde29c7a (2) A0
471597cad322
split(parent, content) as 337fec4d2edc, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
note: testing split
(No patch available, context is not local)
337fec4d2edc (1) A0
$ hg obslog -R $TESTTMP/server --no-graph -f --all --patch tip
f257fde29c7a (2) A0
337fec4d2edc (1) A0