clfilter: introduce `filteredrevs` attribute on changelog
This changeset allows changelog object to be "filtered". You can assign a set of
revision numbers to the `changelog.filteredrevs` attributes. The changelog will
then pretends these revision does not exists in this repo.
A few methods need to be altered to achieve this behavior:
- tip
- __iter_
- irevs
- hasnode
- headrevs
For consistency and to help debugging, the following methods are altered too.
Tests tend to show it's not necessary to alter them but have them raise proper
exception helps to detect bad acces to filtered revisions.
- rev
- node
- linkrev
- parentrevs
- flags
The following methods would also need alteration for consistency purpose but
this is non-trivial and not done yet.
- nodemap
- strip
The C version of headrevs is not run if there is any revision to filter. It'll
need a proper rewrite later to restore performance.
$ "$TESTDIR/hghave" unix-permissions || exit 80
$ hg init a
$ echo a > a/a
$ hg -R a ci -A -m a
adding a
$ hg clone a b
updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo b > b/b
$ hg -R b ci -A -m b
adding b
$ chmod 100 a/.hg/store
$ hg -R b push a
pushing to a
abort: could not lock repository a: Permission denied
[255]
$ chmod 700 a/.hg/store