##// END OF EJS Templates
wireprotov2: define and implement "manifestdata" command...
wireprotov2: define and implement "manifestdata" command The added command can be used for obtaining manifest data. Given a manifest path and set of manifest nodes, data about manifests can be retrieved. Unlike changeset data, we wish to emit deltas to describe manifest revisions. So the command uses the relatively new API for building delta requests and emitting them. The code calls into deltaparent(), which I'm not very keen of. There's still work to be done in delta generation land so implementation details of storage (e.g. exactly one delta is stored/available) don't creep into higher levels. But we can worry about this later (there is already a TODO on imanifestorage tracking this). On the subject of parent deltas, the server assumes parent revisions exist on the receiving end. This is obviously wrong for shallow clone. I've added TODOs to add a mechanism to the command to allow clients to specify desired behavior. This shouldn't be too difficult to implement. Another big change is that the client must explicitly request manifest nodes to retrieve. This is a major departure from "getbundle," where the server derives relevant manifests as it iterates changesets and sends them automatically. As implemented, the client must transmit each requested node to the server. At 20 bytes per node, we're looking at 2 MB per 100,000 nodes. Plus wire encoding overhead. This isn't ideal for clients with limited upload bandwidth. I plan to address this in the future by allowing alternate mechanisms for defining the revisions to retrieve. One idea is to define a range of changeset revisions whose manifest revisions to retrieve (similar to how "changesetdata" works). We almost certainly want an API to look up an individual manifest by node. And that's where I've chosen to start with the implementation. Again, a theme of this early exchangev2 work is I want to start by building primitives for accessing raw repository data first and see how far we can get with those before we need more complexity. Differential Revision: https://phab.mercurial-scm.org/D4488

File last commit:

r38610:be441eb6 default
r39673:c7a7c7e8 default
Show More
diffutil.py
105 lines | 4.3 KiB | text/x-python | PythonLexer
# diffutil.py - utility functions related to diff and patch
#
# Copyright 2006 Brendan Cully <brendan@kublai.com>
# Copyright 2007 Chris Mason <chris.mason@oracle.com>
# Copyright 2018 Octobus <octobus@octobus.net>
#
# 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 .i18n import _
from . import (
mdiff,
pycompat,
)
def diffallopts(ui, opts=None, untrusted=False, section='diff'):
'''return diffopts with all features supported and parsed'''
return difffeatureopts(ui, opts=opts, untrusted=untrusted, section=section,
git=True, whitespace=True, formatchanging=True)
def difffeatureopts(ui, opts=None, untrusted=False, section='diff', git=False,
whitespace=False, formatchanging=False):
'''return diffopts with only opted-in features parsed
Features:
- git: git-style diffs
- whitespace: whitespace options like ignoreblanklines and ignorews
- formatchanging: options that will likely break or cause correctness issues
with most diff parsers
'''
def get(key, name=None, getter=ui.configbool, forceplain=None):
if opts:
v = opts.get(key)
# diffopts flags are either None-default (which is passed
# through unchanged, so we can identify unset values), or
# some other falsey default (eg --unified, which defaults
# to an empty string). We only want to override the config
# entries from hgrc with command line values if they
# appear to have been set, which is any truthy value,
# True, or False.
if v or isinstance(v, bool):
return v
if forceplain is not None and ui.plain():
return forceplain
return getter(section, name or key, untrusted=untrusted)
# core options, expected to be understood by every diff parser
buildopts = {
'nodates': get('nodates'),
'showfunc': get('show_function', 'showfunc'),
'context': get('unified', getter=ui.config),
}
buildopts['xdiff'] = ui.configbool('experimental', 'xdiff')
if git:
buildopts['git'] = get('git')
# since this is in the experimental section, we need to call
# ui.configbool directory
buildopts['showsimilarity'] = ui.configbool('experimental',
'extendedheader.similarity')
# need to inspect the ui object instead of using get() since we want to
# test for an int
hconf = ui.config('experimental', 'extendedheader.index')
if hconf is not None:
hlen = None
try:
# the hash config could be an integer (for length of hash) or a
# word (e.g. short, full, none)
hlen = int(hconf)
if hlen < 0 or hlen > 40:
msg = _("invalid length for extendedheader.index: '%d'\n")
ui.warn(msg % hlen)
except ValueError:
# default value
if hconf == 'short' or hconf == '':
hlen = 12
elif hconf == 'full':
hlen = 40
elif hconf != 'none':
msg = _("invalid value for extendedheader.index: '%s'\n")
ui.warn(msg % hconf)
finally:
buildopts['index'] = hlen
if whitespace:
buildopts['ignorews'] = get('ignore_all_space', 'ignorews')
buildopts['ignorewsamount'] = get('ignore_space_change',
'ignorewsamount')
buildopts['ignoreblanklines'] = get('ignore_blank_lines',
'ignoreblanklines')
buildopts['ignorewseol'] = get('ignore_space_at_eol', 'ignorewseol')
if formatchanging:
buildopts['text'] = opts and opts.get('text')
binary = None if opts is None else opts.get('binary')
buildopts['nobinary'] = (not binary if binary is not None
else get('nobinary', forceplain=False))
buildopts['noprefix'] = get('noprefix', forceplain=False)
buildopts['worddiff'] = get('word_diff', 'word-diff', forceplain=False)
return mdiff.diffopts(**pycompat.strkwargs(buildopts))