obsolete: introduce caches for all meaningful sets
This changeset introduces caches on the `obsstore` that keeps track of sets of
revisions meaningful for obsolescence related logics. For now they are:
- obsolete: changesets used as precursors (and not public),
- extinct: obsolete changesets with osbolete descendants only,
- unstable: non obsolete changesets with obsolete ancestors.
The cache is accessed using the `getobscache(repo, '<set-name>')` function which
builds the cache on demand. The `clearobscaches(repo)` function takes care of
clearing the caches if any.
Caches are cleared when one of these events happens:
- a new marker is added,
- a new changeset is added,
- some changesets are made public,
- some public changesets are demoted to draft or secret.
Declaration of more sets is made easy because we will have to handle at least
two other "troubles" (latecomer and conflicting).
Caches are now used by revset and changectx. It is usually not much more
expensive to compute the whole set than to check the property of a few elements.
The performance boost is welcome in case we apply obsolescence logic on a lot of
revisions. This makes the feature usable!
$ cat >> $HGRCPATH <<EOF
> [extensions]
> graphlog=
> rebase=
> mq=
>
> [phases]
> publish=False
>
> [alias]
> tglog = log -G --template "{rev}: '{desc}' {branches}\n"
> theads = heads --template "{rev}: '{desc}' {branches}\n"
> EOF
$ hg init a
$ cd a
$ echo a > a
$ hg ci -Am A
adding a
$ hg branch branch1
marked working directory as branch branch1
(branches are permanent and global, did you want a bookmark?)
$ hg ci -m 'branch1'
$ echo b > b
$ hg ci -Am B
adding b
$ hg up -q 0
$ hg branch branch2
marked working directory as branch branch2
(branches are permanent and global, did you want a bookmark?)
$ hg ci -m 'branch2'
$ echo c > C
$ hg ci -Am C
adding C
$ hg up -q 2
$ hg branch -f branch2
marked working directory as branch branch2
(branches are permanent and global, did you want a bookmark?)
$ echo d > d
$ hg ci -Am D
adding d
created new head
$ echo e > e
$ hg ci -Am E
adding e
$ hg update default
0 files updated, 0 files merged, 3 files removed, 0 files unresolved
$ hg branch branch3
marked working directory as branch branch3
(branches are permanent and global, did you want a bookmark?)
$ hg ci -m 'branch3'
$ echo f > f
$ hg ci -Am F
adding f
$ cd ..
Rebase part of branch2 (5-6) onto branch3 (8):
$ hg clone -q -u . a a1
$ cd a1
$ hg tglog
@ 8: 'F' branch3
|
o 7: 'branch3' branch3
|
| o 6: 'E' branch2
| |
| o 5: 'D' branch2
| |
| | o 4: 'C' branch2
| | |
+---o 3: 'branch2' branch2
| |
| o 2: 'B' branch1
| |
| o 1: 'branch1' branch1
|/
o 0: 'A'
$ hg branches
branch3 8:4666b71e8e32
branch2 6:5097051d331d
branch1 2:0a03079c47fd (inactive)
default 0:1994f17a630e (inactive)
$ hg theads
8: 'F' branch3
6: 'E' branch2
4: 'C' branch2
2: 'B' branch1
0: 'A'
$ hg rebase -s 5 -d 8
saved backup bundle to $TESTTMP/a1/.hg/strip-backup/*-backup.hg (glob)
$ hg branches
branch3 8:466cdfb14b62
branch2 4:e4fdb121d036
branch1 2:0a03079c47fd
default 0:1994f17a630e (inactive)
$ hg theads
8: 'E' branch3
4: 'C' branch2
2: 'B' branch1
0: 'A'
$ hg tglog
@ 8: 'E' branch3
|
o 7: 'D' branch3
|
o 6: 'F' branch3
|
o 5: 'branch3' branch3
|
| o 4: 'C' branch2
| |
| o 3: 'branch2' branch2
|/
| o 2: 'B' branch1
| |
| o 1: 'branch1' branch1
|/
o 0: 'A'
$ cd ..
Rebase head of branch3 (8) onto branch2 (6):
$ hg clone -q -u . a a2
$ cd a2
$ hg tglog
@ 8: 'F' branch3
|
o 7: 'branch3' branch3
|
| o 6: 'E' branch2
| |
| o 5: 'D' branch2
| |
| | o 4: 'C' branch2
| | |
+---o 3: 'branch2' branch2
| |
| o 2: 'B' branch1
| |
| o 1: 'branch1' branch1
|/
o 0: 'A'
$ hg rebase -s 8 -d 6
saved backup bundle to $TESTTMP/a2/.hg/strip-backup/*-backup.hg (glob)
$ hg branches
branch2 8:6b4bdc1b5ac0
branch3 7:653b9feb4616
branch1 2:0a03079c47fd (inactive)
default 0:1994f17a630e (inactive)
$ hg theads
8: 'F' branch2
7: 'branch3' branch3
4: 'C' branch2
2: 'B' branch1
0: 'A'
$ hg tglog
@ 8: 'F' branch2
|
| o 7: 'branch3' branch3
| |
o | 6: 'E' branch2
| |
o | 5: 'D' branch2
| |
| | o 4: 'C' branch2
| | |
| | o 3: 'branch2' branch2
| |/
o | 2: 'B' branch1
| |
o | 1: 'branch1' branch1
|/
o 0: 'A'
$ hg verify -q
$ cd ..
Rebase entire branch3 (7-8) onto branch2 (6):
$ hg clone -q -u . a a3
$ cd a3
$ hg tglog
@ 8: 'F' branch3
|
o 7: 'branch3' branch3
|
| o 6: 'E' branch2
| |
| o 5: 'D' branch2
| |
| | o 4: 'C' branch2
| | |
+---o 3: 'branch2' branch2
| |
| o 2: 'B' branch1
| |
| o 1: 'branch1' branch1
|/
o 0: 'A'
$ hg rebase -s 7 -d 6
saved backup bundle to $TESTTMP/a3/.hg/strip-backup/*-backup.hg (glob)
$ hg branches
branch2 7:6b4bdc1b5ac0
branch1 2:0a03079c47fd (inactive)
default 0:1994f17a630e (inactive)
$ hg theads
7: 'F' branch2
4: 'C' branch2
2: 'B' branch1
0: 'A'
$ hg tglog
@ 7: 'F' branch2
|
o 6: 'E' branch2
|
o 5: 'D' branch2
|
| o 4: 'C' branch2
| |
| o 3: 'branch2' branch2
| |
o | 2: 'B' branch1
| |
o | 1: 'branch1' branch1
|/
o 0: 'A'
$ hg verify -q
Stripping multiple branches in one go bypasses the fast-case code to
update the branch cache.
$ hg strip 2
0 files updated, 0 files merged, 4 files removed, 0 files unresolved
saved backup bundle to $TESTTMP/a3/.hg/strip-backup/*-backup.hg (glob)
$ hg tglog
o 3: 'C' branch2
|
o 2: 'branch2' branch2
|
| @ 1: 'branch1' branch1
|/
o 0: 'A'
$ hg branches
branch2 3:e4fdb121d036
branch1 1:63379ac49655
default 0:1994f17a630e (inactive)
$ hg theads
3: 'C' branch2
1: 'branch1' branch1
0: 'A'
Fast path branchcache code should not be invoked if branches stripped is not
the same as branches remaining.
$ hg init b
$ cd b
$ hg branch branch1
marked working directory as branch branch1
(branches are permanent and global, did you want a bookmark?)
$ hg ci -m 'branch1'
$ hg branch branch2
marked working directory as branch branch2
(branches are permanent and global, did you want a bookmark?)
$ hg ci -m 'branch2'
$ hg branch -f branch1
marked working directory as branch branch1
(branches are permanent and global, did you want a bookmark?)
$ echo a > A
$ hg ci -Am A
adding A
created new head
$ hg tglog
@ 2: 'A' branch1
|
o 1: 'branch2' branch2
|
o 0: 'branch1' branch1
$ hg theads
2: 'A' branch1
1: 'branch2' branch2
$ hg strip 2
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
saved backup bundle to $TESTTMP/a3/b/.hg/strip-backup/*-backup.hg (glob)
$ hg theads
1: 'branch2' branch2
0: 'branch1' branch1
Make sure requesting to strip a revision already stripped does not confuse things.
Try both orders.
$ cd ..
$ hg init c
$ cd c
$ echo a > a
$ hg ci -Am A
adding a
$ echo b > b
$ hg ci -Am B
adding b
$ echo c > c
$ hg ci -Am C
adding c
$ echo d > d
$ hg ci -Am D
adding d
$ echo e > e
$ hg ci -Am E
adding e
$ hg tglog
@ 4: 'E'
|
o 3: 'D'
|
o 2: 'C'
|
o 1: 'B'
|
o 0: 'A'
$ hg strip 3 4
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
saved backup bundle to $TESTTMP/a3/c/.hg/strip-backup/*-backup.hg (glob)
$ hg theads
2: 'C'
$ hg strip 2 1
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
saved backup bundle to $TESTTMP/a3/c/.hg/strip-backup/*-backup.hg (glob)
$ hg theads
0: 'A'