outgoing: rework the handling of the `missingroots` case to be faster
The previous implementation was slow, to the point it was taking a significant
amount of `hg bundle --type none-streamv2` call. We rework the code to compute
the same value much faster, making the operation disappear from the `hg bundle
--type none-streamv2` profile. Someone would remark that producing a streamclone
does not requires an `outgoing` object. However that is a matter for another
day. There is other user of `missingroots` (non stream `hg bundle` call for
example), and they will also benefit from this rework.
We implement an old TODO in the process, directly computing the missing and
common attribute as we have most element at hand already.
### benchmark.name = hg.command.bundle
# bin-env-vars.hg.flavor = default
# bin-env-vars.hg.py-re2-module = default
# benchmark.variants.revs = all
# benchmark.variants.type = none-streamv2
## data-env-vars.name = heptapod-public-2024-03-25-zstd-sparse-revlog
before: 7.750458
after: 6.665565 (-14.00%, -1.08)
## data-env-vars.name = mercurial-public-2024-03-22-zstd-sparse-revlog
before: 0.700229
after: 0.496050 (-29.16%, -0.20)
## data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog
before: 346.508952
after: 316.749699 (-8.59%, -29.76)
## data-env-vars.name = pypy-2024-03-22-zstd-sparse-revlog
before: 3.401700
after: 2.915810 (-14.28%, -0.49)
## data-env-vars.name = tryton-public-2024-03-22-zstd-sparse-revlog
before: 1.870798
after: 1.461583 (-21.87%, -0.41)
note: this whole `missingroots` of outgoing has a limited number of callers and
could likely be replace by something simpler (like taking an explicit
"missing_revs" set for example). However this is a wider change and we focus on
a small impact, quick rework that does not change the API for now.
# 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')