Installing iCalendar
====================

To install the icalendar package, use:

.. code-block:: shell

    pip install icalendar

If installation is successful, you will be able to import the iCalendar
package, like this:

.. code-block:: pycon

    >>> import icalendar

Development Setup
-----------------

To start contributing changes to icalendar,
you can clone the project to your file system
using Git.
You can `fork <https://github.com/collective/icalendar/fork>`_
the project first and clone your fork, too.

.. code-block:: shell

    git clone https://github.com/collective/icalendar.git
    cd icalendar

Installing Python
-----------------

You will need a version of Python installed to run the tests
and execute the code.
The latest version of Python 3 should work and will be enough
to get you started.
If you like to run the tests with different Python versions,
the following setup process should work the same.

Install Tox
-----------

First, install `tox <https://pypi.org/project/tox/>`_..

.. code-block:: shell

    pip install tox

From now on, tox will manage Python versions and
test commands for you.

Running Tests
-------------

``tox`` manages all test environments in all Python versions.

To run all tests in all environments, simply run ``tox``

.. code-block:: shell

    tox

You may not have all Python versions installed or
you may want to run a specific one.
Have a look at the `documentation
<https://tox.wiki/en/stable/user_guide.html#cli>`_.
This is how you can run ``tox`` with Python 3.9:

.. code-block:: shell

    tox -e py39

Code Style
----------

We strive towards a common code style.
You can run the following command to auto-format the code.

.. code-block:: shell

    tox -e ruff

Accessing a ``tox`` environment
-------------------------------

If you like to enter a specific tox environment,
you can do this:

.. code-block:: shell

    source .tox/py39/bin/activate

Install ``icalendar``  Manually
-------------------------------

The best way to test the package is to use ``tox`` as
described above.
If for some reason you cannot install ``tox``, you can
go ahead with the following section using your
installed version of Python and ``pip``.

If for example, you would like to use your local copy of
icalendar in another Python environment,
this section explains how to do it.

You can install the local copy of ``icalendar`` with ``pip``
like this:

.. code-block:: shell

    cd icalendar
    python -m pip install -e .

This installs the module and dependencies in your
Python environment so that you can access local changes.
If tox fails to install ``icalendar`` during its first run,
you can activate the environment in the ``.tox`` folder and
manually setup ``icalendar`` like this.

Try it out:

.. code-block:: pycon

    Python 3.12.0 (main, Mar  1 2024, 09:09:21) [GCC 13.2.0] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import icalendar
    >>> icalendar.Calendar()
    VCALENDAR({})

Build the documentation
-----------------------

To build the documentation, follow these steps:

.. code-block:: shell

    source .tox/py311/bin/activate
    pip install -r requirements_docs.txt
    cd docs
    make html

You can now open the output from ``_build/html/index.html``.

To build the documentation, view it in a web browser, and automatically reload changes while you edit documentation, use the following command.

.. code-block:: shell

    make livehtml

Then open a web browser at `http://127.0.0.1:8050 <http://127.0.0.1:8050>`_.

To build the presentation-version use  the following command.

.. code-block:: shell

    make presentation

You can open the presentation at ``presentation/index.html``.

You can also use ``tox`` to build the documentation:

.. code-block:: shell

    cd icalendar
    tox -e docs