platformio-core/docs/librarymanager/config.rst

..  Copyright 2014-2015 Ivan Kravets <me@ikravets.com>
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
       http://www.apache.org/licenses/LICENSE-2.0
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

.. |PIOAPICR| replace:: *PlatformIO Library Registry Crawler*
.. _library_config:

library.json
============

``library.json`` is a manifest file of development library. It allows developers
to keep project in own structure and define:

* location of source code
* examples list
* compatible frameworks and platforms
* library dependencies

PlatformIO Library Crawler uses ``library.json`` manifest to extract
source code from developer's location and keeps cleaned library in own
Libraries Storage.

A data in ``library.json`` should be represented
in `JSON-style <http://en.wikipedia.org/wiki/JSON>`_ via
`associative array <http://en.wikipedia.org/wiki/Associative_array>`_
(name/value pairs). An order doesn't matter. The allowable fields
(names from pairs) are described below.

.. contents::

.. _libjson_name:

``name``
--------

**Required** | Type: ``String`` | Max. Length: 50

A name of the library.

* Must be unique.
* Should be slug style for simplicity, consistency and compatibility.
  Example: *Arduino-SPI*
* Title Case, Aa-z, can contain digits and dashes (but not start/end
  with them).
* Consecutive dashes are not allowed.


.. _libjson_description:

``description``
---------------

**Required** | Type: ``String`` | Max. Length: 255

The field helps users to identify and search for your library with a brief
description. Describe the hardware devices (sensors, boards and etc.) which
are suitable with it.


.. _libjson_keywords:

``keywords``
------------

**Required** | Type: ``String`` | Max. Length: 255

Used for search by keyword. Helps to make your library easier to discover
without people needing to know its name.

The keyword should be lowercased, can contain a-z, digits and dash (but not
start/end with them). A list from the keywords can be specified with
separator ``,``


.. _libjson_authors:

``authors``
-----------

*Required* if :ref:`libjson_repository` field is not defined | Type: ``Object``
or ``Array``

An author contact information

* ``name`` Full name (**Required**)
* ``email``
* ``url`` An author's contact page
* ``maintainer`` Specify "maintainer" status

Examples:

.. code-block:: javascript

    "authors":
    {
        "name": "John Smith",
        "email": "me@john-smith.com",
        "url": "http://www.john-smith/contact"
    }

    ...

    "authors":
    [
        {
            "name": "John Smith",
            "email": "me@john-smith.com",
            "url": "http://www.john-smith/contact"
        },
        {
            "name": "Andrew Smith",
            "email": "me@andrew-smith.com",
            "url": "http://www.andrew-smith/contact",
            "maintainer": true
        }
    ]


.. note::
    You can omit :ref:`libjson_authors` field and define
    :ref:`libjson_repository` field. Only *GitHub-based* repository is
    supported now. In this case
    |PIOAPICR| will use information from
    `GitHub API Users <https://developer.github.com/v3/users/>`_.


.. _libjson_repository:

``repository``
--------------

*Required* if :ref:`libjson_downloadurl` field is not defined | Type: ``Object``

The repository in which the source code can be found.

Example:

.. code-block:: javascript

    "repository":
    {
        "type": "git",
        "url": "https://github.com/foo/bar.git"
    }


.. _libjson_downloadurl:

``downloadUrl``
---------------

*Required* if :ref:`libjson_repository` field is not defined | Type: ``String``

It is the *HTTP URL* to the archived source code of library. It should end
with the type of archive (``.zip`` or ``.tar.gz``).


.. _libjson_version:

``version``
-----------

*Required* if :ref:`libjson_repository` field is not defined | Type: ``String``
| Max. Length: 20

A version of the current library source code.

* Can contain a-z, digits, dots or dash.
* `Semantic Versioning <http://semver.org>`_ is recommended.
* A `CVS <http://en.wikipedia.org/wiki/Concurrent_Versions_System>`_
  revision from the latest commit. Example: ``13`` (*SVN*) or first 10
  chars of *SHA* digest ``e4564b7da4`` (*Git*).

.. note::
    You can omit :ref:`libjson_version` field and define
    :ref:`libjson_repository` field. In this case
    |PIOAPICR| will use the *CVS*-revision from the latest commit.


.. _libjson_url:

``url``
-------

*Optional* | Type: ``String`` | Max. Length: 255

Home page of library (if is different from :ref:`libjson_repository` url).


.. _libjson_include:

``include``
-----------

*Optional* | Type: ``String`` or ``Array`` |
`Glob Pattern <http://en.wikipedia.org/wiki/Glob_(programming)>`_

If :ref:`libjson_include` field is a type of ``String``, then
|PIOAPICR| will recognize it like a "relative path inside
repository/archive to library source code". See example below where the only
source code from the relative directory ``LibrarySourceCodeHere`` will be
included.

.. code-block:: javascript

    "include": "some/child/dir/LibrarySourceCodeHere"

If :ref:`libjson_include` field is a type of ``Array``, then
|PIOAPICR| firstly will apply :ref:`libjson_exclude` filter and
then include only directories/files which match with :ref:`libjson_include`
patterns.

Example:

.. code-block:: javascript

    "include":
    [
        "dir/*.[ch]pp",
        "dir/examples/*",
        "*/*/*.h"
    ]

Pattern	Meaning

.. list-table::
    :header-rows:  1

    * - Pattern
      - Meaning
    * - ``*``
      - matches everything
    * - ``?``
      - matches any single character
    * - ``[seq]``
      - matches any character in seq
    * - ``[!seq]``
      - matches any character not in seq


.. _libjson_exclude:

``exclude``
-----------

*Optional* | Type: ``String`` or ``Array`` |
`Glob Pattern <http://en.wikipedia.org/wiki/Glob_(programming)>`_

Exclude the directories and files which match with :ref:`libjson_exclude`
patterns.

.. _libjson_frameworks:

``frameworks``
--------------

*Optional* | Type: ``String`` or ``Array``

A list with compatible frameworks. The available framework types are defined in
the :ref:`platforms` section.

If the library is compatible with the all frameworks, then you can use ``*``
symbol:

.. code-block:: javascript

    "frameworks": "*"

.. _libjson_platforms:

``platforms``
-------------

*Optional* | Type: ``String`` or ``Array``

A list with compatible platforms. The available platform types are
defined in :ref:`platforms` section.

If the library is compatible with the all platforms, then you can use ``*``
symbol:

.. code-block:: javascript

    "platforms": "*"


.. _libjson_dependencies:

``dependencies``
----------------

*Optional* | Type: ``Array`` or ``Object``

A list of dependent libraries. They will be installed automatically with
:ref:`cmd_lib_install` command.

Allowed requirements for dependent library:

* ``name`` | Type: ``String``
* ``authors`` | Type: ``String`` or ``Array``
* ``frameworks`` | Type: ``String`` or ``Array``
* ``platforms`` | Type: ``String`` or ``Array``

Example:

.. code-block:: javascript

    "dependencies":
    [
        {
            "name": "Library-Foo",
            "authors":
            [
                "Jhon Smith",
                "Andrew Smith"
            ]
        },
        {
            "name": "Library-Bar",
            "frameworks": "FrameworkFoo, FrameworkBar"
        }
    ]


.. _libjson_examples:

``examples``
----------------

*Optional* | Type: ``String`` or ``Array`` |
`Glob Pattern <http://en.wikipedia.org/wiki/Glob_(programming)>`_

A list of example patterns. This field is predefined with default value:

.. code-block:: javascript

    "examples": [
        "[Ee]xamples/*/*.ino",
        "[Ee]xamples/*/*.pde"
    ]