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context: introduce p[12]copies() methods and debugp[12]copies commands...
context: introduce p[12]copies() methods and debugp[12]copies commands As mentioned earlier, I'm working on support for storing copy metadata in the changeset instead of in the filelog. In order to transition a repo from storing metadata in filelogs to storing it in the changeset, I'm going to provide a config option for reading the metadata from the changeset, but falling back to getting it from the filelog if it's not in the changeset. In this compatiblity mode, the changeset-optmized algorithms will be used. We will then need to convert the filelog copy metadata to look like that provided by changeset copy metadata. This patch introduces methods that do just that. By having these methods here, we can start writing changeset-optimized algorithms that should work already before we add any support for storing the metadata in the changesets. This commit also includes new debugp[12]copies commands and exercises them in test-copies.t. Differential Revision: https://phab.mercurial-scm.org/D5990

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storefactory.py
85 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':
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))