Mercurial > hg
view mercurial/cacheutil.py @ 39814:d059cb669632
wireprotov2: allow multiple fields to follow revision maps
The *data wire protocol commands emit a series of CBOR values.
Because revision/delta data may be large, their data is emitted
outside the map as a top-level bytestring value.
Before this commit, we'd emit a single optional bytestring
value after the revision descriptor map. This got the job done.
But it was limiting in that we could only send a single field.
And, it required the consumer to know that the presence of a
key in the map implied the existence of a following bytestring
value.
This commit changes the encoding strategy so top-level bytestring
values in the stream are explicitly denoted in a "fieldsfollowing"
key. This key contains an array defining what fields that follow
and the expected size of each field.
By defining things this way, we can easily send N bytestring
values without any ambiguity about their order. In addition,
clients only need to know how to parse ``fieldsfollowing`` to
know if extra values are present.
Because this breaks backwards compatibility, we've bumped the version
number of the wire protocol version 2 API endpoint.
Differential Revision: https://phab.mercurial-scm.org/D4620
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 20 Sep 2018 12:57:23 -0700 |
parents | 72fdd99eb526 |
children | 57875cf423c9 |
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# scmutil.py - Mercurial core utility functions # # Copyright Matt Mackall <mpm@selenic.com> and other # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import from . import repoview def cachetocopy(srcrepo): """return the list of cache file valuable to copy during a clone""" # In local clones we're copying all nodes, not just served # ones. Therefore copy all branch caches over. cachefiles = ['branch2'] cachefiles += ['branch2-%s' % f for f in repoview.filtertable] cachefiles += ['rbc-names-v1', 'rbc-revs-v1'] cachefiles += ['tags2'] cachefiles += ['tags2-%s' % f for f in repoview.filtertable] cachefiles += ['hgtagsfnodes1'] return cachefiles