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Thomas De Schampheleire
tests: admin_permissions: split test_delete_ips from test_add_ips

While it is not necessary to be pedantic and split each assert in a separate
test, it makes sense to create separate tests for separate logical actions.
This makes it easy to understand from a test summary what works and what
doesn't.

Add and delete are deemed two such separate logical actions. The original
test_add_ips test did both add and delete, but was not even named to cover
this.

Note that the 'add' in the delete test is not the same as the 'add' in the
add test, i.e. for the delete test direct method calls are made instead of
passing through self.app.get/post (which is a higher layer of abstraction).

Background of this commit: during the Turbogears2 port, delete actions were
not yet functional, and 'test_add_ips' failed as a result even though 'add'
was perfectly fine.
.. _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`` flag.
The hg/git commands ``hg/git clone``, ``hg/git pull``,
and ``hg/git push`` influence this state:

- A ``clone`` or ``pull`` action locks the target repository
  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 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 will mention 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.