destroyed: update `unserved` branchcache instead Before this changesets the `destroyed` function updated the branchcache for unfiltered repository. As seen in a previous changeset, Read only repo does not cares about the unfiltered repo. We now update it for `unserved`.

destroyed: drop complex branchcache rebuilt logic The strip code used a trick to lower the cost of branchcache update after a strip. However is less necessary since we have branchcache collaboration. Invalid branchcache are likely to be cheaply rebuilt again a near subset of the repo. Moreover, this trick would need update to be relevant in the now filtered repository world. It currently update the unfiltered branchcache that few people cares about. Make it smarter on that aspect would need complexes update of the calling logic So this mechanism is: - Arguably needed, - Currently irrelevant, - Hard to update and I'm dropping it. We now update the branchcache in all case by courtesy of the read only reader. This changeset have a few expected impact on the testsuite are different cache are updated.

branchmap: update cache of 'unserved' filter on new changesets The `commitctx` and `addchangegroup` methods of repo upgrade branchcache after completion. This behavior aims to keep the branchcache in sync for read only process as hgweb. See ee317dbfb9d0 for details. Since changelog filtering is used, those calls only update the cache for unfiltered repo. One of no interest for typical read only process like hgweb. Note: By chance in basic case, `repo.unfiltered() == repo.filtered('unserved')` This changesets have the "unserved" cache updated instead. I think this is the only cache that matter for hgweb. We could imagine updating all possible branchcaches instead but: - I'm not sure it would have any benefit impact. It may even increase the odd of all cache being invalidated. - This is more complicated change. So I'm going for updating a single cache only which is already better that updating a cache nobody cares about. This changeset have a few expected impact on the testsuite are different cache are updated.

tests: make test-hgweb.t output stable Instability introduced in combination of a4d7fd7ad1f7 and e389a25e7e60.

hgweb: ensure _navseq yield strictly increasing numbers This is not hard and allows to drop hack in the customer code.

hgweb: better names for _navseq arguments The old names were misleading.

hgweb: drop recursivity in _navseq This is totally not needed.

hgweb: move the `seq` function out of the revnavgen scope There is not reason for it to be a in there. And this function could use a major reworks.

hgweb: simplify return value creation in for navgen We now have access to better syntax allowing a clearer version.

hgweb: do not access first changeset with a string There is not reason not to use an int

refactoring: use unlinkpath with ignoremissing

docs: "deprecate" checkchanged and checkconflicts in merge-tool configuration These settings were replaced by check=changed and check=conflicts in a912f26777d3. There is no reason to announce two different ways to achieve the same. The old way should be kept but not announced.

tests: run with PYTHONHASHSEED=random Python set and dict iteration order is in principle undefined but usually 'quite stable'. Setting PYTHONHASHSEED=random will make the iteration order more random in Python 2.6.8 and 2.7.3 and where it has been backported. This can thus help spot dependencies on undefined behaviour and prevent future problems.

run-tests: exit cleanly if parallel run is interrupted If interrupted while running with "--jobs N", run-tests asynchronously spewed a bunch of output and backtraces from both the master and slave processes, leaving the terminal full of goop. This patch makes it behave more sensibly.

filtering: rename filters to their antonyms Now that changelog filtering is in place, it's become evident that naming the filters according to the set of revs _not_ included in the filtered changelog is confusing. This is especially evident in the collaborative branch cache scheme. This changes the names of the filters to reflect the revs that _are_ included: hidden -> visible unserved -> served mutable -> immutable impactable -> base repoview.filteredrevs is renamed to filterrevs, so that callers read a bit more sensibly, e.g.: filterrevs('visible') # filter revs according to what's visible