lfs: only hardlink between the usercache and local store if the blob verifies
This fixes the issue where verify (and other read commands) would propagate
corrupt blobs. I originalled coded this to only hardlink if 'verify=True' for
store.read(), but then good blobs weren't being linked, and this broke a bunch
of tests. (The blob in repo5 that is being corrupted seems to be linked into
repo5 in the loop running dumpflog.py prior to it being corrupted, but only if
verify=False is handled too.) It's probably better to do a one time extra
verification in order to create these files, so that the repo can be copied to a
removable drive.
Adding the same check to store.write() was only for completeness, but also needs
to do a one time extra verification to avoid breaking tests.
# Copyright 2009, Alexander Solovyov <piranha@piranha.org.ua>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""extend schemes with shortcuts to repository swarms
This extension allows you to specify shortcuts for parent URLs with a
lot of repositories to act like a scheme, for example::
[schemes]
py = http://code.python.org/hg/
After that you can use it like::
hg clone py://trunk/
Additionally there is support for some more complex schemas, for
example used by Google Code::
[schemes]
gcode = http://{1}.googlecode.com/hg/
The syntax is taken from Mercurial templates, and you have unlimited
number of variables, starting with ``{1}`` and continuing with
``{2}``, ``{3}`` and so on. This variables will receive parts of URL
supplied, split by ``/``. Anything not specified as ``{part}`` will be
just appended to an URL.
For convenience, the extension adds these schemes by default::
[schemes]
py = http://hg.python.org/
bb = https://bitbucket.org/
bb+ssh = ssh://hg@bitbucket.org/
gcode = https://{1}.googlecode.com/hg/
kiln = https://{1}.kilnhg.com/Repo/
You can override a predefined scheme by defining a new scheme with the
same name.
"""
from __future__ import absolute_import
import os
import re
from mercurial.i18n import _
from mercurial import (
error,
extensions,
hg,
pycompat,
registrar,
templater,
util,
)
cmdtable = {}
command = registrar.command(cmdtable)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = 'ships-with-hg-core'
_partre = re.compile(br'\{(\d+)\}')
class ShortRepository(object):
def __init__(self, url, scheme, templater):
self.scheme = scheme
self.templater = templater
self.url = url
try:
self.parts = max(map(int, _partre.findall(self.url)))
except ValueError:
self.parts = 0
def __repr__(self):
return '<ShortRepository: %s>' % self.scheme
def instance(self, ui, url, create):
url = self.resolve(url)
return hg._peerlookup(url).instance(ui, url, create)
def resolve(self, url):
# Should this use the util.url class, or is manual parsing better?
try:
url = url.split('://', 1)[1]
except IndexError:
raise error.Abort(_("no '://' in scheme url '%s'") % url)
parts = url.split('/', self.parts)
if len(parts) > self.parts:
tail = parts[-1]
parts = parts[:-1]
else:
tail = ''
context = dict((str(i + 1), v) for i, v in enumerate(parts))
return ''.join(self.templater.process(self.url, context)) + tail
def hasdriveletter(orig, path):
if path:
for scheme in schemes:
if path.startswith(scheme + ':'):
return False
return orig(path)
schemes = {
'py': 'http://hg.python.org/',
'bb': 'https://bitbucket.org/',
'bb+ssh': 'ssh://hg@bitbucket.org/',
'gcode': 'https://{1}.googlecode.com/hg/',
'kiln': 'https://{1}.kilnhg.com/Repo/'
}
def extsetup(ui):
schemes.update(dict(ui.configitems('schemes')))
t = templater.engine(lambda x: x)
for scheme, url in schemes.items():
if (pycompat.iswindows and len(scheme) == 1 and scheme.isalpha()
and os.path.exists('%s:\\' % scheme)):
raise error.Abort(_('custom scheme %s:// conflicts with drive '
'letter %s:\\\n') % (scheme, scheme.upper()))
hg.schemes[scheme] = ShortRepository(url, scheme, t)
extensions.wrapfunction(util, 'hasdriveletter', hasdriveletter)
@command('debugexpandscheme', norepo=True)
def expandscheme(ui, url, **opts):
"""given a repo path, provide the scheme-expanded path
"""
repo = hg._peerlookup(url)
if isinstance(repo, ShortRepository):
url = repo.resolve(url)
ui.write(url + '\n')