evolve: add logic to handle a particular case in divergence resolution
Case is: In content divergence, to check if the two csets are on different
parent or same parent what we do is find gca of the two csets and then
compare it with the singlesuccessors of two csets's parents.
Now, if gca is same as singlesuccessors of both the csets then we conclude
that both are on the same parent which is not totally correct as it is
possible that both the parents of two csets are obsolete with a single
successor.
This patch adds the logic to cover the above metioned case correctly,
deciding the part when we need to relocate a cset to other side while
resolving the stack of divergent csets.
Changes in test file demonstrate that before this patch we were not
doing it right because it should have relocated every node to other side
instead of just relocating the first one from the stack.
This test file test the various messages when accessing obsolete
revisions.
Global setup
============
$ . $TESTDIR/testlib/obshistory_setup.sh
Test output with lots of splitted commit
========================================
Test setup
----------
$ hg init $TESTTMP/local-lots-split
$ cd $TESTTMP/local-lots-split
$ mkcommit ROOT
$ echo 42 >> a
$ echo 43 >> b
$ echo 44 >> c
$ echo 45 >> d
$ hg commit -A -m "A0"
adding a
adding b
adding c
adding d
$ hg log --hidden -G
@ changeset: 1:de7290d8b885
| 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)' -d "0 0" << EOF
> y
> y
> n
> n
> n
> y
> y
> y
> n
> n
> y
> y
> y
> n
> y
> y
> y
> EOF
0 files updated, 0 files merged, 4 files removed, 0 files unresolved
adding a
adding b
adding c
adding d
diff --git a/a b/a
new file mode 100644
examine changes to 'a'? [Ynesfdaq?] y
@@ -0,0 +1,1 @@
+42
record change 1/4 to 'a'? [Ynesfdaq?] y
diff --git a/b b/b
new file mode 100644
examine changes to 'b'? [Ynesfdaq?] n
diff --git a/c b/c
new file mode 100644
examine changes to 'c'? [Ynesfdaq?] n
diff --git a/d b/d
new file mode 100644
examine changes to 'd'? [Ynesfdaq?] n
created new head
continue splitting? [Ycdq?] y
diff --git a/b b/b
new file mode 100644
examine changes to 'b'? [Ynesfdaq?] y
@@ -0,0 +1,1 @@
+43
record change 1/3 to 'b'? [Ynesfdaq?] y
diff --git a/c b/c
new file mode 100644
examine changes to 'c'? [Ynesfdaq?] n
diff --git a/d b/d
new file mode 100644
examine changes to 'd'? [Ynesfdaq?] n
continue splitting? [Ycdq?] y
diff --git a/c b/c
new file mode 100644
examine changes to 'c'? [Ynesfdaq?] y
@@ -0,0 +1,1 @@
+44
record change 1/2 to 'c'? [Ynesfdaq?] y
diff --git a/d b/d
new file mode 100644
examine changes to 'd'? [Ynesfdaq?] n
continue splitting? [Ycdq?] y
diff --git a/d b/d
new file mode 100644
examine changes to 'd'? [Ynesfdaq?] y
@@ -0,0 +1,1 @@
+45
record this change to 'd'? [Ynesfdaq?] y
no more change to split
$ hg log --hidden -G
@ changeset: 5:c7f044602e9b
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A0
|
o changeset: 4:1ae8bc733a14
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A0
|
o changeset: 3:f257fde29c7a
| 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:de7290d8b885
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| obsolete: split using split as 2:337fec4d2edc, 3:f257fde29c7a, 4:1ae8bc733a14, 5:c7f044602e9b
| summary: A0
|
o changeset: 0:ea207398892e
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ROOT
Actual test
-----------
$ hg obslog de7290d8b885 --hidden --patch
x de7290d8b885 (1) A0
rewritten(parent, content) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
(No patch available, too many successors (4))
$ hg obslog de7290d8b885 --hidden --all --patch
o 1ae8bc733a14 (4) A0
|
| o 337fec4d2edc (2) A0
|/
| @ c7f044602e9b (5) A0
|/
| o f257fde29c7a (3) A0
|/
x de7290d8b885 (1) A0
rewritten(parent, content) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
(No patch available, too many successors (4))
$ hg obslog de7290d8b885 --hidden --no-graph -Tjson | python -m json.tool
[
{
"markers": [
{
"date": [
*, (glob)
0 (glob)
],
"effect": [
"parent",
"content"
],
"operation": "split",
"succnodes": [
"1ae8bc733a14",
"337fec4d2edc",
"c7f044602e9b",
"f257fde29c7a"
],
"user": "test",
"verb": "rewritten"
}
],
"node": "de7290d8b885",
"rev": 1,
"shortdescription": "A0"
}
]
$ hg obslog c7f044602e9b --patch
@ c7f044602e9b (5) A0
|
x de7290d8b885 (1) A0
rewritten(parent, content) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
(No patch available, too many successors (4))
$ hg obslog c7f044602e9b --no-graph -Tjson | python -m json.tool
[
{
"markers": [],
"node": "c7f044602e9b",
"rev": 5,
"shortdescription": "A0"
},
{
"markers": [
{
"date": [
*, (glob)
0 (glob)
],
"effect": [
"parent",
"content"
],
"operation": "split",
"succnodes": [
"1ae8bc733a14",
"337fec4d2edc",
"c7f044602e9b",
"f257fde29c7a"
],
"user": "test",
"verb": "rewritten"
}
],
"node": "de7290d8b885",
"rev": 1,
"shortdescription": "A0"
}
]
Check that debugobshistory on all heads show a coherent graph
$ hg obslog 2::5 --patch
o 1ae8bc733a14 (4) A0
|
| o 337fec4d2edc (2) A0
|/
| @ c7f044602e9b (5) A0
|/
| o f257fde29c7a (3) A0
|/
x de7290d8b885 (1) A0
rewritten(parent, content) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
(No patch available, too many successors (4))
$ hg obslog 5 --all --patch
o 1ae8bc733a14 (4) A0
|
| o 337fec4d2edc (2) A0
|/
| @ c7f044602e9b (5) A0
|/
| o f257fde29c7a (3) A0
|/
x de7290d8b885 (1) A0
rewritten(parent, content) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a using split by test (Thu Jan 01 00:00:00 1970 +0000)
(No patch available, too many successors (4))
$ hg update de7290d8b885
abort: hidden revision 'de7290d8b885' was split as: 337fec4d2edc, f257fde29c7a and 2 more!
(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 de7290d8b885
(hidden revision 'de7290d8b885' was split as: 337fec4d2edc, f257fde29c7a and 2 more)
working directory parent is obsolete! (de7290d8b885)
(use 'hg evolve' to update to its tipmost successor: 337fec4d2edc, f257fde29c7a and 2 more)