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Thomas De Schampheleire

locale: fix environment checks: LC_ALL has precedence over LC_CTYPE

'man 7 locale' describes following precedence:

If the second argument to setlocale(3) is an empty string, "", for
the default locale, it is determined using the following steps:

1. If there is a non-null environment variable LC_ALL, the value of
LC_ALL is used.

2. If an environment variable with the same name as one of the
categories above exists and is non-null, its value is used for that
category.

3. If there is a non-null environment variable LANG, the value of
LANG is used.

So, if LC_ALL is set, it is used regardless of LC_CTYPE or LANG.
Hence, when suggesting users what to change when their locale is invalid, we
should also first check LC_ALL instead of LC_CTYPE.

.. _statistics:

=====================
Repository statistics
=====================

Kallithea has a *repository statistics* feature, disabled by default. When
enabled, the amount of commits per committer is visualized in a timeline. This
feature can be enabled using the ``Enable statistics`` checkbox on the
repository ``Settings`` page.

The statistics system makes heavy demands on the server resources, so
in order to keep a balance between usability and performance, statistics are
cached inside the database and gathered incrementally.

When Celery is disabled:

  On each first visit to the summary page a set of 250 commits are parsed and
  added to the statistics cache. This incremental gathering also happens on each
  visit to the statistics page, until all commits are fetched.

  Statistics are kept cached until additional commits are added to the
  repository. In such a case Kallithea will only fetch the new commits when
  updating its statistics cache.

When Celery is enabled:

  On the first visit to the summary page, Kallithea will create tasks that will
  execute on Celery workers. These tasks will gather all of the statistics until
  all commits are parsed. Each task parses 250 commits, then launches a new
  task.