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Thomas De Schampheleire
model/scm: fix incorrect reporting of pull from remote git repo

In issue #327 it was reported that the pull of a remote git repo causes the
following inaccurate journal entry:
"committed via Kallithea into repository"

The problem is caused by the following flow:

1. pull_changes calls _handle_push for git repos, passing
action='push_remote'.

2. _handle_push calls _handle_rc_scm_extras, but does not pass 'action'

3. _handle_rc_scm_extras uses a default value of 'push_local' for action.

4. The action string 'push_local' will result in the mentioned journal
entry, via action_map in action_parser() (kallithea/lib/helpers.py).


To get a more accurate log entry, _handle_push should pass the action that
it got from pull_changes. In that case, the log entry will become
"pulled from remote into repository"
.. _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.