contrib: update hg-ssh to conform with import style checks

contrib/hg-ssh

@@ -1,87 +1,93 b''
 #!/usr/bin/env python
 #
 # Copyright 2005-2007 by Intevation GmbH <[e-mail]>
 #
 # Author(s):
 # Thomas Arendsen Hein <[e-mail]>
 #
 # 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
-from mercurial import demandimport; demandimport.enable()
+import hgdemandimport ; hgdemandimport.enable()
 
-from mercurial import dispatch, ui as uimod
-
-import sys, os, shlex
+from mercurial import (
+    dispatch,
+    ui as uimod,
+)
 
 def main():
     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 = ['-R', repo, 'serve', '--stdio']
             req = dispatch.request(cmd)
             if readonly:
                 if not req.ui:
                     req.ui = uimod.ui.load()
                 req.ui.setconfig('hooks', 'pretxnopen.hg-ssh',
                                  'python:__main__.rejectpush', 'hg-ssh')
                 req.ui.setconfig('hooks', 'prepushkey.hg-ssh',
                                  'python:__main__.rejectpush', '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(("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()