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Søren Løvborg
auth: turn dead AuthUser code into assertion

The result of db.User.get_dict never contains the keys 'api_keys' or
'permissions'. The keys returned by get_dict are 1) all the User table
columns, 2) the keys explicitly defined in User.__json__, and 3) the
keys defined in User.get_api_data, none of which include the two
blacklisted keys.

'api_keys' would be returned if __json__ called get_api_data with
argument details=True; but currently that is not the case.

In case there's a reason why these two keys must never appear in an
AuthUser object, the check has not been removed entirely; instead, it's
been turned into an assertion. This way, it will be noticed if __json__
is later modified to request detailed API data, for instance.
.. _locking:

==================
Repository locking
==================

Kallithea has a ``repository locking`` feature, disabled by default. When
enabled, every initial clone and every pull gives users (with write permission)
the exclusive right to do a push.

When repository locking is enabled, repositories get a ``locked`` state that
can be true or false.  The hg/git commands ``hg/git clone``, ``hg/git pull``,
and ``hg/git push`` influence this state:

- A ``clone`` or ``pull`` action on the repository locks it (``locked=true``)
  if the user has write/admin permissions on this repository.

- Kallithea will remember the user who locked the repository so only this
  specific user can unlock the repo (``locked=false``) by performing a ``push``
  command.

- Every other command on a locked repository from this user and every command
  from any other user will result in an HTTP return code 423 (Locked).
  Additionally, the HTTP error includes the <user> that locked the repository
  (e.g., “repository <repo> locked by user <user>”).

Each repository can be manually unlocked by an administrator from the
repository settings menu.