branchcache: add a "pure topological head" fast path
In a narrow but actually quick common case, all topological heads are all on
the same branch and all open. In this case, computing the branch map is very
simple. We can quickly detect situation where this situation will not change.
So we update the V3 format to be able to express this situation and upgrade the
update code to detect we remains in that mode.
The branch cache is populated with the actual value when the branch map is
accessed, but the update_disk method can do the update without needing to
populate it.
# factotum.py - Plan 9 factotum integration for Mercurial
#
# Copyright (C) 2012 Steven Stallion <sstallion@gmail.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
'''http authentication with factotum
This extension allows the factotum(4) facility on Plan 9 from Bell Labs
platforms to provide authentication information for HTTP access. Configuration
entries specified in the auth section as well as authentication information
provided in the repository URL are fully supported. If no prefix is specified,
a value of "*" will be assumed.
By default, keys are specified as::
proto=pass service=hg prefix=<prefix> user=<username> !password=<password>
If the factotum extension is unable to read the required key, one will be
requested interactively.
A configuration section is available to customize runtime behavior. By
default, these entries are::
[factotum]
executable = /bin/auth/factotum
mountpoint = /mnt/factotum
service = hg
The executable entry defines the full path to the factotum binary. The
mountpoint entry defines the path to the factotum file service. Lastly, the
service entry controls the service name used when reading keys.
'''
import os
from mercurial.i18n import _
from mercurial.utils import procutil
from mercurial import (
error,
httpconnection,
registrar,
url,
util,
)
urlreq = util.urlreq
passwordmgr = url.passwordmgr
ERRMAX = 128
_executable = _mountpoint = _service = None
configtable = {}
configitem = registrar.configitem(configtable)
configitem(
b'factotum',
b'executable',
default=b'/bin/auth/factotum',
)
configitem(
b'factotum',
b'mountpoint',
default=b'/mnt/factotum',
)
configitem(
b'factotum',
b'service',
default=b'hg',
)
def auth_getkey(self, params):
if not self.ui.interactive():
raise error.Abort(_(b'factotum not interactive'))
if b'user=' not in params:
params = b'%s user?' % params
params = b'%s !password?' % params
os.system(procutil.tonativestr(b"%s -g '%s'" % (_executable, params)))
def auth_getuserpasswd(self, getkey, params):
params = b'proto=pass %s' % params
while True:
fd = os.open(b'%s/rpc' % _mountpoint, os.O_RDWR)
try:
os.write(fd, b'start %s' % params)
l = os.read(fd, ERRMAX).split()
if l[0] == b'ok':
os.write(fd, b'read')
status, user, passwd = os.read(fd, ERRMAX).split(None, 2)
if status == b'ok':
if passwd.startswith(b"'"):
if passwd.endswith(b"'"):
passwd = passwd[1:-1].replace(b"''", b"'")
else:
raise error.Abort(_(b'malformed password string'))
return (user, passwd)
except (OSError, IOError):
raise error.Abort(_(b'factotum not responding'))
finally:
os.close(fd)
getkey(self, params)
def monkeypatch_method(cls):
def decorator(func):
setattr(cls, func.__name__, func)
return func
return decorator
@monkeypatch_method(passwordmgr)
def find_user_password(self, realm, authuri):
user, passwd = self.passwddb.find_user_password(realm, authuri)
if user and passwd:
self._writedebug(user, passwd)
return (user, passwd)
prefix = b''
res = httpconnection.readauthforuri(self.ui, authuri, user)
if res:
_, auth = res
prefix = auth.get(b'prefix')
user, passwd = auth.get(b'username'), auth.get(b'password')
if not user or not passwd:
if not prefix:
prefix = realm.split(b' ')[0].lower()
params = b'service=%s prefix=%s' % (_service, prefix)
if user:
params = b'%s user=%s' % (params, user)
user, passwd = auth_getuserpasswd(self, auth_getkey, params)
self.add_password(realm, authuri, user, passwd)
self._writedebug(user, passwd)
return (user, passwd)
def uisetup(ui):
global _executable
_executable = ui.config(b'factotum', b'executable')
global _mountpoint
_mountpoint = ui.config(b'factotum', b'mountpoint')
global _service
_service = ui.config(b'factotum', b'service')