view mercurial/pushkey.py @ 20801:9c5183cb9bca

bundle2: very first version of a bundle2 bundler

This changeset is the very first of a long series. It create a new bundle2
module and add a simple class that generate and empty bundle2 container.

The module is documented with the current state of the implementation. For
information about the final goal you may want to consult the mercurial wiki
page:

    http://mercurial.selenic.com/wiki/BundleFormat2

The documentation of the module will be updated with later patches adding more and
more feature to the format.

This patches also introduce a test case. This test case build and use its own
small extension that use the new bundle2 module. Since the new format is unable
to do anything right now, we could not use real mercurial code to test it.
Moreover, some advanced feature of the bundle2 spec will not be used by core
mercurial at all. So we need to have them tested.

# pushkey.py - dispatching for pushing and pulling keys
#
# Copyright 2010 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

import bookmarks, phases, obsolete

def _nslist(repo):
    n = {}
    for k in _namespaces:
        n[k] = ""
    if not obsolete._enabled:
        n.pop('obsolete')
    return n

_namespaces = {"namespaces": (lambda *x: False, _nslist),
               "bookmarks": (bookmarks.pushbookmark, bookmarks.listbookmarks),
               "phases": (phases.pushphase, phases.listphases),
               "obsolete": (obsolete.pushmarker, obsolete.listmarkers),
              }

def register(namespace, pushkey, listkeys):
    _namespaces[namespace] = (pushkey, listkeys)

def _get(namespace):
    return _namespaces.get(namespace, (lambda *x: False, lambda *x: {}))

def push(repo, namespace, key, old, new):
    '''should succeed iff value was old'''
    pk = _get(namespace)[0]
    return pk(repo, key, old, new)

def list(repo, namespace):
    '''return a dict'''
    lk = _get(namespace)[1]
    return lk(repo)