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# acl.py - changeset access control for mercurial
#
# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
#
# this hook allows to allow or deny access to parts of a repo when
# taking incoming changesets.
#
# authorization is against local user name on system where hook is
# run, not committer of original changeset (since that is easy to
# spoof).
#
# acl hook is best to use if you use hgsh to set up restricted shells
# for authenticated users to only push to / pull from. not safe if
# user has interactive shell access, because they can disable hook.
# also not safe if remote users share one local account, because then
# no way to tell remote users apart.
#
# to use, configure acl extension in hgrc like this:
#
# [extensions]
# hgext.acl =
#
# [hooks]
# pretxnchangegroup.acl = python:hgext.acl.hook
#
# [acl]
# sources = serve # check if source of incoming changes in this list
# # ("serve" == ssh or http, "push", "pull", "bundle")
#
# allow and deny lists have subtree pattern (default syntax is glob)
# on left, user names on right. deny list checked before allow list.
#
# [acl.allow]
# # if acl.allow not present, all users allowed by default
# # empty acl.allow = no users allowed
# docs/** = doc_writer
# .hgtags = release_engineer
#
# [acl.deny]
# # if acl.deny not present, no users denied by default
# # empty acl.deny = all users allowed
# glob pattern = user4, user5
# ** = user6
from mercurial.i18n import _
from mercurial.node import *
from mercurial import util
import getpass
class checker(object):
'''acl checker.'''
def buildmatch(self, key):
'''return tuple of (match function, list enabled).'''
if not self.ui.has_section(key):
self.ui.debug(_('acl: %s not enabled\n') % key)
return None, False
thisuser = self.getuser()
pats = [pat for pat, users in self.ui.configitems(key)
if thisuser in users.replace(',', ' ').split()]
self.ui.debug(_('acl: %s enabled, %d entries for user %s\n') %
(key, len(pats), thisuser))
if pats:
match = util.matcher(self.repo.root, names=pats)[1]
else:
match = util.never
return match, True
def getuser(self):
'''return name of authenticated user.'''
return self.user
def __init__(self, ui, repo):
self.ui = ui
self.repo = repo
self.user = getpass.getuser()
cfg = self.ui.config('acl', 'config')
if cfg:
self.ui.readsections(cfg, 'acl.allow', 'acl.deny')
self.allow, self.allowable = self.buildmatch('acl.allow')
self.deny, self.deniable = self.buildmatch('acl.deny')
def skipsource(self, source):
'''true if incoming changes from this source should be skipped.'''
ok_sources = self.ui.config('acl', 'sources', 'serve').split()
return source not in ok_sources
def check(self, node):
'''return if access allowed, raise exception if not.'''
files = self.repo.changectx(node).files()
if self.deniable:
for f in files:
if self.deny(f):
self.ui.debug(_('acl: user %s denied on %s\n') %
(self.getuser(), f))
raise util.Abort(_('acl: access denied for changeset %s') %
short(node))
if self.allowable:
for f in files:
if not self.allow(f):
self.ui.debug(_('acl: user %s not allowed on %s\n') %
(self.getuser(), f))
raise util.Abort(_('acl: access denied for changeset %s') %
short(node))
self.ui.debug(_('acl: allowing changeset %s\n') % short(node))
def hook(ui, repo, hooktype, node=None, source=None, **kwargs):
if hooktype != 'pretxnchangegroup':
raise util.Abort(_('config error - hook type "%s" cannot stop '
'incoming changesets') % hooktype)
c = checker(ui, repo)
if c.skipsource(source):
ui.debug(_('acl: changes have source "%s" - skipping\n') % source)
return
start = repo.changelog.rev(bin(node))
end = repo.changelog.count()
for rev in xrange(start, end):
c.check(repo.changelog.node(rev))
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