push: move bundle2-pushkey based bookmarks exchange in its own function We are about to introduce an alternative way to push bookmark over bundle2.

bookmark: add pushkey hook compatiblity to the bundle2 part Currently, pushing a bookmark update triggers a pushkey hooks. It is likely that users in the wild use such hooks to control bookmark movement. Using a non push-key mechanism to exchange bookmark means these hooks are no longer called, possibly breaking existing users setup. So we add explicit call to the pushkey hooks in the handling of the bundle2 part. This behavior can be disabled with a new config knob: 'server.bookmarks-pushkey-compat'.

bookmark: introduce a 'bookmarks' part This part can carry and apply bookmarks information. We start with adding the core behavior of the part. In its current form, the part is only suitable for push since it plain update the bookmark without consideration for the local state. Support of the behavior needed for pulling will be added in later changesets.

push: include a 'check:bookmarks' part when possible Before updating the actual bookmark update, we can start with updating the way we check for push race. Checking bookmarks state earlier is useful even if we still use pushkey. Aborting before the changegroup is added can save a lot of time.

bookmark: add a 'check:bookmarks' bundle2 part This part checks that bookmarks are still at the node they are expected to be. This allows a pushing client to detect push race where the repository was updated between the time it discovered the server state and the time it managed to finish its push. Such checking already exists when pushing bookmark through pushkey. This new part can be inserted at the beginning of the bundle, triggering abort earlier. In addition, we would like to move away from pushey to push bookmark. A step useful to solve issue5165.

bookmark: add methods to binary encode and decode bookmark values Coming new bundle2 parts related to bookmark will use a binary encoding. It encodes a series of '(bookmark, node)' pairs. Bookmark name has a high enough size limit to not be affected by issue5165. (64K length, we are well covered)

tests: remove {a..h} bashism from remotenames I'm not bothering with a check-code test because this is a weird construct that I didn't even know existed before it was breaking the BSD build, and it also appears to fail if /bin/sh is dash like it is on our Linux builder. Differential Revision: https://phab.mercurial-scm.org/D1605

hgweb: move common vertex code to Graph.prototype Just to give some context to the return values: vertex() needs to return two HTML elements as strings, <li> to be used as a background and a <li> to be shown in foreground. The latter was made obsolete recently when changesets started to be rendered server-side, but background elements are still useful for now.

hgweb: create Graph methods using a prototype This way it's possible to call the original methods even if they were overridden.

hgweb: remove unused Graph.cur property It was introduced in 0dba955c2636, but was already unused. I missed it in e46f0b653002.

tests: remove shell function helper from test-largefiles-misc Now that all the complexity is in a Python script, we can just directly invoke the tool. Differential Revision: https://phab.mercurial-scm.org/D1599

contrib: ban find(1)'s -printf operator, as it is a GNU-ism Differential Revision: https://phab.mercurial-scm.org/D1598

merge with stable

repoview: include filter name in repr for debugging

repoview: extract a factory function of proxy class This makes sure that dynamically-created class objects are isolated from local binding of repo instances. The type cache is moved to module level as it isn't tied to each instance.