merge default into stable for 2.1 code freeze

revset: add remote() predicate to lookup remote revisions

bookmarks: automatically advance bookmark on naked update (BC) (issue2894)

qimport: back out 2eec74d7ce95 This patch presumed mq csets must always be secret, which isn't yet established.

phases: only synchronize on common changeset when push fails If push failed we should not expect the pushed changeset to exist on remote. The common set before the push is used for phase related operation instead of common + missing. Note: * We still pull phase data even if push fails * We still try to push data even if push fails (same than bookmark)

discovery: diet discovery.prepush from non-discovery code The ``discovery.prepush`` function was doing multiple things not related to discovery. This changeset move some code into the ``localrepo.push`` method. The old ``discovery.prepush`` function jobs is now restricted to checking for multple head creation. It was then renamed ``discovery.checkheads``. This new ``discovery.checkheads`` function may receive several other changes in the future but we are a bit too much near the freeze for a wider refactoring.

qfinish: set all qfinished patch as draft, not only qbase Fix a silly bug.

largefiles: test and simplify empty directory removal in remove

tag: invalidate tag cache immediately after adding new tag (issue3210) New tags were written to .hgtags / .hglocaltags without updating or invalidating the localrepo cache. Before afd459933d5f a lock was acquired soon after the new tags had been written, and that invalidated the cache so the new tags for example could be seen in pretxncommit hooks. With afd459933d5f the lock had already been acquired at this point and the missing cache invalidation was exposed. The tag caches will now explicitly and immediately be invalidated when new tags are added.

mq: ensure mq changesets are set to secret when no phase data are found

mq: qimporting revision set them to secret

mq: have mq create secret changeset only

wireproto: refuse to lookup secret csets

qclone: ignore local qbase if secret

rebase: only advance phase on successful commit

phases: mechanism to allow extension to alter initial computation of phase This commit add a whennodata list where extension can register a callback to be called if no phase related data are found in the repository. The goal is to ensure the existing extension that move phase data in 2.1 can compute consistent phase boundary for existing repo.

qclone: add a few comment and blank line This help readability.

mq: turn changeset draft on qfinish (except if qparent is secret) As mq automatically sets changesets as secret, it should make them draft when he is done with it. We do not move them automatically to draft when we detect that something else have also set them as secret through their parents.

config: have a way to backup and restore value in config This is introduce to allow temporary overwriting of a config value while being able to reinstall the old value once done. The main advantage over using ``config`` and ``setconfig`` is that backup and restore will properly restore the lack of any config. Restoring the fact that there was no value is important to allow config user to keep using meaniful default value. A more naive approach will result in the following scenario:: Before: config(section, item, my_default) --> my_default temporal overwrite old = config(section, item) … setconfig(section, item, old) After config(section, item, my_default) --> None The first user of this feature should be mq to overwriting minimal phase of future commit.

graft: add test to check the phase of new changesets Graft actually do not keep the phase of the source changesets: no need to change the graft code and add test to check this behaviour.

rebase: fix phases movement Rebase now try to keep the phases of source changesets.

largefiles: cache new largefiles for new heads when pulling When the user pulls from a remote repository that is not his default repo, it is quite likely that he will pull a new head. This means that if he tries to merge or rebase with the other head, he will run into a problem becuase largefiles has no way of tracking where the remote repository for this other head is, so it cannot download the largefiles from this other remote repository. It will attempt to download them from its default remote repository, which will not yet contain the largefiles. This patch solves this problem by caching any new largefiles for all heads directly into the system cache at the time of the pull, so they are available later. This behavior is actually more in line with Mercurial's distributed nature, because pulling already implies we have a connection to the remote server, but merging or rebasing does not.

largefiles: remove unused lfutil.readhash()

largefiles: check if largefile could be found when archiving (issue3193)