branchcache: add a "pure topological head" fast path
In a narrow but actually quick common case, all topological heads are all on
the same branch and all open. In this case, computing the branch map is very
simple. We can quickly detect situation where this situation will not change.
So we update the V3 format to be able to express this situation and upgrade the
update code to detect we remains in that mode.
The branch cache is populated with the actual value when the branch map is
accessed, but the update_disk method can do the update without needing to
populate it.
This test file test the various messages when accessing obsolete
revisions.
Global setup
============
$ . $TESTDIR/testlib/obsmarker-common.sh
$ cat >> $HGRCPATH <<EOF
> [ui]
> interactive = true
> [phases]
> publish=False
> [experimental]
> evolution.createmarkers = yes
> evolution.effect-flags = yes
> evolution.allowdivergence=true
> EOF
Test output on amended commit
=============================
Test setup
----------
$ hg init $TESTTMP/local-amend
$ cd $TESTTMP/local-amend
$ mkcommit ROOT
$ mkcommit A0
$ echo 42 >> A0
$ hg commit --amend -m "A1
>
> Better commit message"
$ hg log --hidden -G
@ changeset: 2:4ae3a4151de9
| tag: tip
| parent: 0:ea207398892e
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A1
|
| x changeset: 1:471f378eab4c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| obsolete: rewritten using amend as 2:4ae3a4151de9
| summary: A0
|
o changeset: 0:ea207398892e
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ROOT
Actual test
-----------
$ hg update 471f378eab4c
abort: hidden revision '471f378eab4c' was rewritten as: 4ae3a4151de9
(use --hidden to access hidden revisions)
[10]
$ hg update --hidden "desc(A0)"
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to hidden changeset 471f378eab4c
(hidden revision '471f378eab4c' was rewritten as: 4ae3a4151de9)
Test output with pruned commit
==============================
Test setup
----------
$ hg init $TESTTMP/local-prune
$ cd $TESTTMP/local-prune
$ mkcommit ROOT
$ mkcommit A0 # 0
$ mkcommit B0 # 1
$ hg log --hidden -G
@ changeset: 2:0dec01379d3b
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B0
|
o changeset: 1:471f378eab4c
| 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 debugobsolete --record-parents `getid 'desc(B0)'`
1 new obsolescence markers
obsoleted 1 changesets
$ hg log --hidden -G
@ changeset: 2:0dec01379d3b
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| obsolete: pruned
| summary: B0
|
o changeset: 1:471f378eab4c
| 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
Actual test
-----------
$ hg up 1
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg up 0dec01379d3b
abort: hidden revision '0dec01379d3b' is pruned
(use --hidden to access hidden revisions)
[10]
$ hg up --hidden -r 'desc(B0)'
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to hidden changeset 0dec01379d3b
(hidden revision '0dec01379d3b' is pruned)
Test output with splitted commit
================================
Test setup
----------
$ hg init $TESTTMP/local-split
$ cd $TESTTMP/local-split
$ mkcommit ROOT
$ 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
# Simulate a split
$ hg up 0
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo 42 >> a
$ hg commit -A -m "A0"
adding a
created new head
$ echo 43 >> b
$ hg commit -A -m "A0"
adding b
$ hg debugobsolete `getid '1'` `getid '2'` `getid '3'`
1 new obsolescence markers
obsoleted 1 changesets
$ 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 as 2:337fec4d2edc, 3:f257fde29c7a
| summary: A0
|
o changeset: 0:ea207398892e
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ROOT
Actual test
-----------
$ hg update 471597cad322
abort: hidden revision '471597cad322' was split as: 337fec4d2edc, f257fde29c7a
(use --hidden to access hidden revisions)
[10]
$ 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)
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
# Simulate a split
$ hg up 0
0 files updated, 0 files merged, 4 files removed, 0 files unresolved
$ echo 42 >> a
$ hg commit -A -m "A0"
adding a
created new head
$ echo 43 >> b
$ hg commit -A -m "A0"
adding b
$ echo 44 >> c
$ hg commit -A -m "A0"
adding c
$ echo 45 >> d
$ hg commit -A -m "A0"
adding d
$ hg debugobsolete `getid '1'` `getid '2'` `getid '3'` `getid '4'` `getid '5'`
1 new obsolescence markers
obsoleted 1 changesets
$ 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 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 update de7290d8b885
abort: hidden revision 'de7290d8b885' was split as: 337fec4d2edc, f257fde29c7a and 2 more
(use --hidden to access hidden revisions)
[10]
$ 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)
Test output with folded commit
==============================
Test setup
----------
$ hg init $TESTTMP/local-fold
$ cd $TESTTMP/local-fold
$ mkcommit ROOT
$ mkcommit A0
$ mkcommit B0
$ hg log --hidden -G
@ changeset: 2:0dec01379d3b
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B0
|
o changeset: 1:471f378eab4c
| 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
# Simulate a fold
$ hg up 0
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo "A0" > A0
$ echo "B0" > B0
$ hg add A0 B0
$ hg commit -m "C0"
created new head
$ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(C0)'`
1 new obsolescence markers
obsoleted 1 changesets
1 new orphan changesets
$ hg debugobsolete `getid 'desc(B0)'` `getid 'desc(C0)'`
1 new obsolescence markers
obsoleted 1 changesets
$ hg log --hidden -G
@ changeset: 3:eb5a0daa2192
| tag: tip
| parent: 0:ea207398892e
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: C0
|
| x changeset: 2:0dec01379d3b
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | obsolete: rewritten as 3:eb5a0daa2192
| | summary: B0
| |
| x changeset: 1:471f378eab4c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| obsolete: rewritten as 3:eb5a0daa2192
| summary: A0
|
o changeset: 0:ea207398892e
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ROOT
Actual test
-----------
$ hg update 471f378eab4c
abort: hidden revision '471f378eab4c' was rewritten as: eb5a0daa2192
(use --hidden to access hidden revisions)
[10]
$ hg update --hidden 'desc(A0)'
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
updated to hidden changeset 471f378eab4c
(hidden revision '471f378eab4c' was rewritten as: eb5a0daa2192)
$ hg update 0dec01379d3b
abort: hidden revision '0dec01379d3b' was rewritten as: eb5a0daa2192
(use --hidden to access hidden revisions)
[10]
$ hg update --hidden 'desc(B0)'
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to hidden changeset 0dec01379d3b
(hidden revision '0dec01379d3b' was rewritten as: eb5a0daa2192)
Test output with divergence
===========================
Test setup
----------
$ hg init $TESTTMP/local-divergence
$ cd $TESTTMP/local-divergence
$ mkcommit ROOT
$ mkcommit A0
$ hg commit --amend -m "A1"
$ hg log --hidden -G
@ changeset: 2:fdf9bde5129a
| tag: tip
| parent: 0:ea207398892e
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A1
|
| x changeset: 1:471f378eab4c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| obsolete: rewritten using amend as 2:fdf9bde5129a
| summary: A0
|
o changeset: 0:ea207398892e
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ROOT
$ hg update --hidden 'desc(A0)'
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to hidden changeset 471f378eab4c
(hidden revision '471f378eab4c' was rewritten as: fdf9bde5129a)
$ hg commit --amend -m "A2"
2 new content-divergent changesets
$ hg log --hidden -G
@ changeset: 3:65b757b745b9
| tag: tip
| parent: 0:ea207398892e
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| instability: content-divergent
| summary: A2
|
| * changeset: 2:fdf9bde5129a
|/ parent: 0:ea207398892e
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| instability: content-divergent
| summary: A1
|
| x changeset: 1:471f378eab4c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| obsolete: rewritten using amend as 2:fdf9bde5129a
| obsolete: rewritten using amend as 3:65b757b745b9
| summary: A0
|
o changeset: 0:ea207398892e
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ROOT
Actual test
-----------
$ hg update 471f378eab4c
abort: hidden revision '471f378eab4c' has diverged
(use --hidden to access hidden revisions)
[10]
$ hg update --hidden 'desc(A0)'
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to hidden changeset 471f378eab4c
(hidden revision '471f378eab4c' has diverged)
Test output with amended + folded commit
========================================
Test setup
----------
$ hg init $TESTTMP/local-amend-fold
$ cd $TESTTMP/local-amend-fold
$ mkcommit ROOT
$ mkcommit A0
$ mkcommit B0
$ hg commit --amend -m "B1"
$ hg log --hidden -G
@ changeset: 3:b7ea6d14e664
| tag: tip
| parent: 1:471f378eab4c
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B1
|
| x changeset: 2:0dec01379d3b
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| obsolete: rewritten using amend as 3:b7ea6d14e664
| summary: B0
|
o changeset: 1:471f378eab4c
| 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
# Simulate a fold
$ hg up 0
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo "A0" > A0
$ echo "B0" > B0
$ hg add A0 B0
$ hg commit -m "C0"
created new head
$ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(C0)'`
1 new obsolescence markers
obsoleted 1 changesets
1 new orphan changesets
$ hg debugobsolete `getid 'desc(B1)'` `getid 'desc(C0)'`
1 new obsolescence markers
obsoleted 1 changesets
$ hg log --hidden -G
@ changeset: 4:eb5a0daa2192
| tag: tip
| parent: 0:ea207398892e
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: C0
|
| x changeset: 3:b7ea6d14e664
| | parent: 1:471f378eab4c
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | obsolete: rewritten as 4:eb5a0daa2192
| | summary: B1
| |
| | x changeset: 2:0dec01379d3b
| |/ user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | obsolete: rewritten using amend as 3:b7ea6d14e664
| | summary: B0
| |
| x changeset: 1:471f378eab4c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| obsolete: rewritten as 4:eb5a0daa2192
| summary: A0
|
o changeset: 0:ea207398892e
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: ROOT
Actual test
-----------
$ hg update 471f378eab4c
abort: hidden revision '471f378eab4c' was rewritten as: eb5a0daa2192
(use --hidden to access hidden revisions)
[10]
$ hg update --hidden 'desc(A0)'
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
updated to hidden changeset 471f378eab4c
(hidden revision '471f378eab4c' was rewritten as: eb5a0daa2192)
$ hg update --hidden 0dec01379d3b
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to hidden changeset 0dec01379d3b
(hidden revision '0dec01379d3b' was rewritten as: eb5a0daa2192)
$ hg update 0dec01379d3b
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg update --hidden 'desc(B0)'
0 files updated, 0 files merged, 0 files removed, 0 files unresolved