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)

largefiles: refactor lfutil.findfiles to be more logical

forget: fix subrepo recursion for explicit path handling When support for handling explicit paths in subrepos was added to the forget command (95174c381525), subrepo recursion wasn't taken into account. This change fixes that by pulling the majority of the logic of commands.forget into cmdutil.forget, which can then be called from both there and subrepo.forget.

add: fix subrepo recursion for explicit path handling When support for handling explicit paths in subrepos was added to the add command (9e99d2bbb1b1), subrepo recursion wasn't taken into account. This change adds an explicitonly argument to cmdutil.add to allow controlling which levels of recursion should include only explicit paths versus all matched paths.

tests: add subrepo recursion tests for add/forget with explicit paths When support for handling add/forget of explicit paths within subrepos was added (9e99d2bbb1b1/95174c381525), nested subrepos weren't handled properly. This change adds test coverage to expose the broken behavior, which will be fixed in later patches.