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499f4df5a8
Allows you to restrict a ssh key to have read-only access to a set of repos by passing the --read-only flag to hg-ssh. This is useful in an environment where the number of unix users you can or are willing to create is limited. In such an environment, multiple users or applications will share a single unix account. Some of those applications will likely need read-only access to the repository. This change makes it possible to grant them such access without requiring that they use a separate unix account.
87 lines
2.9 KiB
Python
Executable File
87 lines
2.9 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright 2005-2007 by Intevation GmbH <intevation@intevation.de>
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#
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# Author(s):
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# Thomas Arendsen Hein <thomas@intevation.de>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""
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hg-ssh - a wrapper for ssh access to a limited set of mercurial repos
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To be used in ~/.ssh/authorized_keys with the "command" option, see sshd(8):
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command="hg-ssh path/to/repo1 /path/to/repo2 ~/repo3 ~user/repo4" ssh-dss ...
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(probably together with these other useful options:
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no-port-forwarding,no-X11-forwarding,no-agent-forwarding)
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This allows pull/push over ssh from/to the repositories given as arguments.
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If all your repositories are subdirectories of a common directory, you can
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allow shorter paths with:
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command="cd path/to/my/repositories && hg-ssh repo1 subdir/repo2"
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You can use pattern matching of your normal shell, e.g.:
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command="cd repos && hg-ssh user/thomas/* projects/{mercurial,foo}"
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You can also add a --read-only flag to allow read-only access to a key, e.g.:
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command="hg-ssh --read-only repos/*"
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"""
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# enable importing on demand to reduce startup time
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from mercurial import demandimport; demandimport.enable()
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from mercurial import dispatch
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import sys, os, shlex
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def main():
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cwd = os.getcwd()
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readonly = False
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args = sys.argv[1:]
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while len(args):
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if args[0] == '--read-only':
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readonly = True
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args.pop(0)
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else:
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break
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allowed_paths = [os.path.normpath(os.path.join(cwd,
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os.path.expanduser(path)))
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for path in args]
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orig_cmd = os.getenv('SSH_ORIGINAL_COMMAND', '?')
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try:
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cmdargv = shlex.split(orig_cmd)
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except ValueError, e:
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sys.stderr.write('Illegal command "%s": %s\n' % (orig_cmd, e))
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sys.exit(255)
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if cmdargv[:2] == ['hg', '-R'] and cmdargv[3:] == ['serve', '--stdio']:
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path = cmdargv[2]
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repo = os.path.normpath(os.path.join(cwd, os.path.expanduser(path)))
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if repo in allowed_paths:
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cmd = ['-R', repo, 'serve', '--stdio']
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if readonly:
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cmd += [
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'--config',
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'hooks.prechangegroup.hg-ssh=python:__main__.rejectpush',
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'--config',
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'hooks.prepushkey.hg-ssh=python:__main__.rejectpush'
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]
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dispatch.dispatch(dispatch.request(cmd))
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else:
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sys.stderr.write('Illegal repository "%s"\n' % repo)
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sys.exit(255)
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else:
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sys.stderr.write('Illegal command "%s"\n' % orig_cmd)
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sys.exit(255)
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def rejectpush(ui, **kwargs):
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ui.warn("Permission denied\n")
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# mercurial hooks use unix process conventions for hook return values
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# so a truthy return means failure
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return True
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if __name__ == '__main__':
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main()
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