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Limit Query Plugin
==================
``limit`` is a plugin to limit a query to the first or last set of results. We
also provide a query prefix ``'<n'`` to inline the same behavior in the ``list``
command. They are analogous to piping results:
$ beet [list|ls] [QUERY] | [head|tail] -n n
There are two provided interfaces:
1. ``beet lslimit [--head n | --tail n] [QUERY]`` returns the head or tail of a
query
2. ``beet [list|ls] [QUERY] '<n'`` returns the head of a query
There are two differences in behavior:
1. The query prefix does not support tail.
2. The query prefix could appear anywhere in the query but will only have the
same behavior as the ``lslimit`` command and piping to ``head`` when it appears
last.
Performance for the query previx is much worse due to the current
singleton-based implementation.
So why does the query prefix exist? Because it composes with any other
query-based API or plugin (see :doc:`/reference/query`). For example, you can
use the query prefix in ``smartplaylist`` (see :doc:`/plugins/smartplaylist`) to
limit the number of tracks in a smart playlist for applications like most played
and recently added.
Configuration
-------------
Enable the ``limit`` plugin in your configuration (see :ref:`using-plugins`).
Examples
--------
First 10 tracks
.. code-block:: sh
$ beet ls | head -n 10
$ beet lslimit --head 10
$ beet ls '<10'
Last 10 tracks
.. code-block:: sh
$ beet ls | tail -n 10
$ beet lslimit --tail 10
100 mostly recently released tracks
.. code-block:: sh
$ beet lslimit --head 100 year- month- day-
$ beet ls year- month- day- '<100'
$ beet lslimit --tail 100 year+ month+ day+
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