branchmap: allow to use cache of subset
Filtered repository are *subset* of unfiltered repository. This means that a
filtered branchmap could be use to compute the unfiltered version.
And filtered version happen to be subset of each other:
- "all() - unserved()" is a subset of "all() - hidden()"
- "all() - hidden()" is a subset of "all()"
This means that branchmap with "unfiltered" filter can be used as a base for
"hidden" branchmap that itself could be used as a base for unfiltered
branchmap.
unserved < hidden < None
This changeset implements this mechanism. If the on disk branchcache is not valid
we use the branchcache of the nearest subset as base instead of computing it from
scratch. Such fallback can be cascaded multiple time is necessary.
Note that both "hidden" and "unserved" set are a bit volatile. We will add more
stable filtering in next changesets.
This changeset enables collaboration between no filtering and "unserved"
filtering. Fixing performance regression introduced by
47f00b0de337
repoview: add a subset table
This will be used by branchmap collaboration. See inline documentation for more
details
branchmap: add a copy method
If we want branchcache of different filter to collaborate, they need a simple
way to copy each other. This will ensure that each filtered have no side effect
on other filter level cache.
clfilter: use empty frozenset intead of empty tuple
This will allows set operation needed for cache collaboration.
run-tests.py: don't use console for stdin when running in debug mode
Tests would wait for input instead of using non-interactive mode.
test-largefiles.t: fix wrong '#if hgweb' - it should be '#if serve'
A bug introduced in
0c1d10351869 did that a part of the test never was run.
dispatch: show empty filename in OSError aborts
Mercurial would sometimes exit with:
abort: No such file or directory
where str of the actual OSError exception was the more helpful:
[Errno 2] No such file or directory: ''
The exception will now always show the filename and quote it:
abort: No such file or directory: ''
test-dispatch.t: remove incorrect "cd $dir"
A line that should have been removed in
50fbe9063ff2.