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wireproto: allow wire protocol commands to declare transport support...
wireproto: allow wire protocol commands to declare transport support Currently, wire protocol commands are exposed on all transports. Some wire protocol commands are only supported or sensical on some transports. In the future, new wire protocol commands may only be available on new transports and legacy wire protocol commands may not be available to newer transports. This commit introduces a mechanism to allow @wireprotocommand to declare transports for which they should not be available. The mechanism for determining if a wire protocol command is available for a given transport instance has been taught to take this knowledge into account. To help implement this feature, we add a dict to wireprototypes declaring all wire transports and their metadata. There's probably room to refactor the constants used to identify the wire protocols. But that can be in another commit. Differential Revision: https://phab.mercurial-scm.org/D2483

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storefactory.py
86 lines | 2.5 KiB | text/x-python | PythonLexer
# 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
import re
from mercurial.i18n import _
from mercurial import (
error,
hg,
util,
)
from . import (
lfutil,
localstore,
wirestore,
)
# During clone this function is passed the src's ui object
# but it needs the dest's ui object so it can read out of
# the config file. Use repo.ui instead.
def openstore(repo=None, remote=None, put=False, ui=None):
if ui is None:
ui = repo.ui
if not remote:
lfpullsource = getattr(repo, 'lfpullsource', None)
if lfpullsource:
path = ui.expandpath(lfpullsource)
elif put:
path = ui.expandpath('default-push', 'default')
else:
path = ui.expandpath('default')
# ui.expandpath() leaves 'default-push' and 'default' alone if
# they cannot be expanded: fallback to the empty string,
# meaning the current directory.
if repo is None:
path = ui.expandpath('default')
path, _branches = hg.parseurl(path)
remote = hg.peer(repo or ui, {}, path)
elif path == 'default-push' or path == 'default':
path = ''
remote = repo
else:
path, _branches = hg.parseurl(path)
remote = hg.peer(repo or ui, {}, path)
# The path could be a scheme so use Mercurial's normal functionality
# to resolve the scheme to a repository and use its path
path = util.safehasattr(remote, 'url') and remote.url() or remote.path
match = _scheme_re.match(path)
if not match: # regular filesystem path
scheme = 'file'
else:
scheme = match.group(1)
try:
storeproviders = _storeprovider[scheme]
except KeyError:
raise error.Abort(_('unsupported URL scheme %r') % scheme)
for classobj in storeproviders:
try:
return classobj(ui, repo, remote)
except lfutil.storeprotonotcapable:
pass
raise error.Abort(_('%s does not appear to be a largefile store') %
util.hidepassword(path))
_storeprovider = {
'file': [localstore.localstore],
'http': [wirestore.wirestore],
'https': [wirestore.wirestore],
'ssh': [wirestore.wirestore],
}
_scheme_re = re.compile(br'^([a-zA-Z0-9+-.]+)://')
def getlfile(ui, hash):
return util.chunkbuffer(openstore(ui=ui)._get(hash))