=========================
Installation
=========================


We define here two types of installation:

- `Installation for standard users`_: for users who want to process data.

- `Installation for contributors`_: for contributors who want to enrich the project (eg. add a new features).

We recommend users and contributors first set up a virtual environment to install RADAR-API.


.. _virtual_environment:

Virtual environment creation
===============================

While not mandatory, utilizing a virtual environment when installing RADAR-API is recommended.

Using a virtual environment for installing packages provides isolation of dependencies,
easier package management, easier maintenance, improved security, and improved development workflow.

We provide two options to set up a virtual environment: using `venv <https://docs.python.org/3/library/venv.html>`__
or `conda <https://docs.conda.io/en/latest/>`__ (recommended).

**With conda:**

* Install `miniconda <https://docs.conda.io/en/latest/miniconda.html>`__
  or `anaconda <https://docs.anaconda.com/anaconda/install/>`__
  if you don't have it already installed.

* Create the *radar-api-py311* (or any other custom name) conda environment:

.. code-block:: bash

	conda create --name radar-api-py311 python=3.11 --no-default-packages

* Activate the *radar-api-py311* conda environment:

.. code-block:: bash

	conda activate radar-api-py311


**With venv:**

* Windows: Create a virtual environment with venv:

.. code-block:: bash

   python -m venv radar-api-pyXXX
   cd radar-api-pyXXX/Scripts
   activate


* Mac/Linux: Create a virtual environment with venv:

.. code-block:: bash

   virtualenv -p python3 radar-api-pyXXX
   source radar-api-pyXXX/bin/activate

.. _installation_standard:

Installation for standard users
==================================

The latest RADAR-API stable version is available
on the `Python Packaging Index (PyPI) <https://pypi.org/project/radar-api/>`__
and on the `conda-forge channel <https://anaconda.org/conda-forge/radar-api>`__.

Please install the package in the virtual environment you created before!

**With conda:**

.. code-block:: bash

   conda install -c conda-forge radar-api

.. note::
   In an alternative to conda, if you are looking for a lightweight package manager you could use `micromamba <https://micromamba.readthedocs.io/en/latest/>`__.

**With pip:**

.. code-block:: bash

   pip install radar-api

.. _installation_contributor:

Installation for contributors
================================

The latest RADAR-API version is available on the GitHub repository `radar_api <https://github.com/ghiggi/radar_api>`_.
You can install the package in editable mode, so that you can modify the code and see the changes immediately.
The following steps guides to the package installation in editable mode.

Clone the repository from GitHub
......................................

According to the :ref:`contributors guidelines <contributor_guidelines>`,
you should first
`create a fork into your personal GitHub account <https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/fork-a-repo>`__.

Then create a local copy of the repository you forked with:

.. code-block:: bash

   git clone https://github.com/<your-account>/radar_api.git
   cd radar_api

Create the development environment
......................................

We recommend creating a dedicated conda environment for development purposes.
You can create a conda environment (i.e. with python 3.11) with:

.. code-block:: bash

	conda create --name radar-api-dev-py311 python=3.11 --no-default-packages
	conda activate radar-api-dev-py311

Install the package dependencies
............................................

.. code-block:: bash

	conda install --only-deps radar-api


Install the package in editable mode
................................................

Install the RADAR-API package in editable mode by executing the following command in the RADAR-API repository's root:

.. code-block:: bash

	pip install -e ".[dev]"


Install code quality checks
..............................................

Install the pre-commit hook by executing the following command in the RADAR-API repository's root:

.. code-block:: bash

   pre-commit install


Pre-commit hooks are automated scripts that run during each commit to detect basic code quality issues.
If a hook identifies an issue (signified by the pre-commit script exiting with a non-zero status), it halts the commit process and displays the error messages.

.. note::
	The versions of the software used in the pre-commit hooks are specified in the `.pre-commit-config.yaml <https://github.com/ghiggi/radar_api/blob/main/.pre-commit-config.yaml>`__ file. This file serves as a configuration guide, ensuring that the hooks are executed with the correct versions of each tool, thereby maintaining consistency and reliability in the code quality checks.

Further details about pre-commit hooks can be found in the Contributors Guidelines, specifically in the provided in the :ref:`Code quality control <code_quality_control>` section.

Optional dependencies
=======================

Specific functionalities in RADAR-API require additional optional dependencies.
To unlock the full functionalities offered by RADAR-API, it is recommended to install also the packages detailed here below.

The following bash code allow to install all optional dependencies:

.. code-block:: bash

   conda install -c conda-forge jupyter spyder xradar wradlib arm_pyart flox numbagg bottleneck opt-einsum python-graphviz bokeh


IDE Tools
..............

For an improved development experience, consider installing the intuitive `Jupyter <https://jupyter.org/>`_ and
`Spyder <https://www.spyder-ide.org/>`_ Python Integrated Development Environments (IDEs):

.. code-block:: bash

   conda install -c conda-forge jupyter spyder


Radar Processing
...................................

To read and process ground and spaceborne radar data, install
`xradar <https://docs.openradarscience.org/projects/xradar/en/stable/>`_,
`wradlib <https://docs.wradlib.org/en/latest/>`_.
`pyart <https://arm-doe.github.io/pyart/>`_ and
`gpm-api <https://gpm-api.readthedocs.io/>`_.

.. code-block:: bash

   conda install -c conda-forge xradar wradlib arm_pyart gpm-api


Speed Up Xarray Computations
..........................................

To speed up arrays computations with xarray, install
`flox <https://flox.readthedocs.io/en/latest/>`_,
`numbagg <https://github.com/numbagg/numbagg>`_,
`bottleneck <https://bottleneck.readthedocs.io/en/latest/intro.html>`_ and
`opt-einsum <https://optimized-einsum.readthedocs.io/en/stable/>`_:

.. code-block:: bash

   conda install -c conda-forge flox numbagg bottleneck opt-einsum

Dask Operations
......................

To visualize `Dask Task Graphs  <https://docs.dask.org/en/stable/10-minutes-to-dask.html>`_ and monitor
computations through the `Dask Dashboard <https://docs.dask.org/en/stable/dashboard.html>`_, please install:

.. code-block:: bash

   conda install -c conda-forge python-graphviz bokeh


Run on Jupyter Notebooks
=====================================

If you want to run RADAR-API on a `Jupyter Notebook <https://jupyter.org/>`__,
you have to take care to set up the IPython kernel environment where RADAR-API is installed.

For example, if your conda/virtual environment is named ``radar-api-dev``, run:

.. code-block:: bash

   python -m ipykernel install --user --name=radar-api-dev

When you will use the Jupyter Notebook, by clicking on ``Kernel`` and then ``Change Kernel``, you will be able to select the ``radar-api-dev`` kernel.