##// END OF EJS Templates
refactor: prefer checks against nullrev over nullid...
refactor: prefer checks against nullrev over nullid A common pattern is using a changeset context and obtaining the node to compare against nullid. Change this to obtain the nullrev instead. In the future, the nullid becomes a property of the repository and is no longer a global constant, so using nullrev is much easier to reason about. Python function call overhead makes the difference moot, but future changes will result in more dictionary lookups otherwise, so prefer the simpler pattern. Differential Revision: https://phab.mercurial-scm.org/D10290

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hg-ssh
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#!/usr/bin/env python3
#
# Copyright 2005-2007 by Intevation GmbH <intevation@intevation.de>
#
# Author(s):
# Thomas Arendsen Hein <thomas@intevation.de>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""
hg-ssh - a wrapper for ssh access to a limited set of mercurial repos
To be used in ~/.ssh/authorized_keys with the "command" option, see sshd(8):
command="hg-ssh path/to/repo1 /path/to/repo2 ~/repo3 ~user/repo4" ssh-dss ...
(probably together with these other useful options:
no-port-forwarding,no-X11-forwarding,no-agent-forwarding)
This allows pull/push over ssh from/to the repositories given as arguments.
If all your repositories are subdirectories of a common directory, you can
allow shorter paths with:
command="cd path/to/my/repositories && hg-ssh repo1 subdir/repo2"
You can use pattern matching of your normal shell, e.g.:
command="cd repos && hg-ssh user/thomas/* projects/{mercurial,foo}"
You can also add a --read-only flag to allow read-only access to a key, e.g.:
command="hg-ssh --read-only repos/*"
"""
from __future__ import absolute_import
import os
import shlex
import sys
# enable importing on demand to reduce startup time
import hgdemandimport
hgdemandimport.enable()
from mercurial import (
dispatch,
pycompat,
ui as uimod,
)
def main():
# Prevent insertion/deletion of CRs
dispatch.initstdio()
cwd = os.getcwd()
readonly = False
args = sys.argv[1:]
while len(args):
if args[0] == '--read-only':
readonly = True
args.pop(0)
else:
break
allowed_paths = [
os.path.normpath(os.path.join(cwd, os.path.expanduser(path)))
for path in args
]
orig_cmd = os.getenv('SSH_ORIGINAL_COMMAND', '?')
try:
cmdargv = shlex.split(orig_cmd)
except ValueError as e:
sys.stderr.write('Illegal command "%s": %s\n' % (orig_cmd, e))
sys.exit(255)
if cmdargv[:2] == ['hg', '-R'] and cmdargv[3:] == ['serve', '--stdio']:
path = cmdargv[2]
repo = os.path.normpath(os.path.join(cwd, os.path.expanduser(path)))
if repo in allowed_paths:
cmd = [b'-R', pycompat.fsencode(repo), b'serve', b'--stdio']
req = dispatch.request(cmd)
if readonly:
if not req.ui:
req.ui = uimod.ui.load()
req.ui.setconfig(
b'hooks',
b'pretxnopen.hg-ssh',
b'python:__main__.rejectpush',
b'hg-ssh',
)
req.ui.setconfig(
b'hooks',
b'prepushkey.hg-ssh',
b'python:__main__.rejectpush',
b'hg-ssh',
)
dispatch.dispatch(req)
else:
sys.stderr.write('Illegal repository "%s"\n' % repo)
sys.exit(255)
else:
sys.stderr.write('Illegal command "%s"\n' % orig_cmd)
sys.exit(255)
def rejectpush(ui, **kwargs):
ui.warn((b"Permission denied\n"))
# mercurial hooks use unix process conventions for hook return values
# so a truthy return means failure
return True
if __name__ == '__main__':
main()