cache: introduce an abstract class for cache we can upgrade incrementally
Right now each class implements their own mechanism for validation, and
update. We start introducing abstract class to ultimately allow more
unification of the cache code.
The end goal of this series is to introduce a cache for some obsolescence
property, not to actually implement the cache. However, taking advantage of
adding a new cache to introduce the abstract class seems like a win.
This code was headed for core during the 4.3 cycle but never made it there. So
we starts with a copy in the evolve repository.
This feature requires mercurial 3.0
(and the `only()` revset is 3.0 specific)
$ (hg help revset | grep '"only(' > /dev/null) || exit 80
Test creation of obsolescence marker by path import
$ hg init auto-obsolete
$ cd auto-obsolete
$ echo '[extensions]' >> $HGRCPATH
$ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH
$ echo A > a
$ hg commit -Am A
adding a
$ echo B > b
$ hg commit -Am B
adding b
$ hg up '.^'
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo C > c
$ hg commit -Am C
adding c
created new head
$ hg log -G
@ changeset: 2:eb8dd0f31b51
| tag: tip
| parent: 0:f2bbf19cf96d
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: C
|
| o changeset: 1:95b760afef3c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B
|
o changeset: 0:f2bbf19cf96d
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: A
(actual test)
$ hg export 'desc(B)' | hg import - --obsolete
applying patch from stdin
$ hg log -G
@ changeset: 3:00c49133f17e
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B
|
o changeset: 2:eb8dd0f31b51
| parent: 0:f2bbf19cf96d
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: C
|
o changeset: 0:f2bbf19cf96d
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: A
$ hg debugobsolete
95b760afef3c234ffb3f9fd391edcb36e60921a4 00c49133f17e5e5a52b6ef1b6d516c0e90b56d8a 0 (*) {'user': 'test'} (glob)
$ hg rollback
repository tip rolled back to revision 2 (undo import)
working directory now based on revision 2
$ hg log -G
@ changeset: 2:eb8dd0f31b51
| tag: tip
| parent: 0:f2bbf19cf96d
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: C
|
| o changeset: 1:95b760afef3c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B
|
o changeset: 0:f2bbf19cf96d
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: A
$ hg debugobsolete