Mercurial > hg
view mercurial/templates/map-cmdline.changelog @ 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 | f4aeb952ab77 |
children |
line wrap: on
line source
[templates] header = '{date|shortdate} {author|person} <{author|email}>\n\n' header_verbose = '' changeset = '\t* {files|stringify|fill68|tabindent}{desc|fill68|tabindent|strip}\n\t[{node|short}]{tags}{branches}\n\n' changeset_quiet = '\t* {desc|firstline|fill68|tabindent|strip}\n\n' changeset_verbose = '{date|isodate} {author|person} <{author|email}> ({node|short}{tags}{branches})\n\n\t* {file_adds|stringify|fill68|tabindent}{file_dels|stringify|fill68|tabindent}{files|stringify|fill68|tabindent}{desc|fill68|tabindent|strip}\n\n' start_tags = ' [' tag = '{tag}, ' last_tag = '{tag}]' start_branches = ' <' branch = '{branch}, ' last_branch = '{branch}>' file = '{file}, ' last_file = '{file}:\n\t' file_add = '{file_add}, ' last_file_add = '{file_add}: new file.\n* ' file_del = '{file_del}, ' last_file_del = '{file_del}: deleted file.\n* '