.. _installation:

==========================

Installation on Unix/Linux

==========================

The following describes three different ways of installing Kallithea:

- :ref:`installation-source`: The simplest way to keep the installation

  up-to-date and track any local customizations is to run directly from

  source in a Kallithea repository clone, preferably inside a virtualenv

  virtual Python environment.

- :ref:`installation-virtualenv`: If you prefer to only use released versions

  of Kallithea, the recommended method is to install Kallithea in a virtual

  Python environment using `virtualenv`. The advantages of this method over

  direct installation is that Kallithea and its dependencies are completely

  contained inside the virtualenv (which also means you can have multiple

  installations side by side or remove it entirely by just removing the

  virtualenv directory) and does not require root privileges.

- :ref:`installation-without-virtualenv`: The alternative method of installing

  a Kallithea release is using standard pip. The package will be installed in

  the same location as all other Python packages you have ever installed. As a

  result, removing it is not as straightforward as with a virtualenv, as you'd

  have to remove its dependencies manually and make sure that they are not

  needed by other packages.

Regardless of the installation method you may need to make sure you have

appropriate development packages installed, as installation of some of the

Kallithea dependencies requires a working C compiler and libffi library

headers. Depending on your configuration, you may also need to install

Git and development packages for the database of your choice.

For Debian and Ubuntu, the following command will ensure that a reasonable

set of dependencies is installed::

    sudo apt-get install build-essential git libffi-dev python3-dev

For Fedora and RHEL-derivatives, the following command will ensure that a

reasonable set of dependencies is installed::

    sudo yum install gcc git libffi-devel python3-devel

.. _installation-source:

Installation from repository source

-----------------------------------

To install Kallithea in a virtualenv using the stable branch of the development

repository, use the following commands in your bash shell::

        hg clone https://kallithea-scm.org/repos/kallithea -u stable

        cd kallithea

        python3 -m venv ../kallithea-venv

        . ../kallithea-venv/bin/activate

        pip install --upgrade pip setuptools

        pip install --upgrade -e .

        python3 setup.py compile_catalog   # for translation of the UI

You can now proceed to :ref:`install-front-end`.

.. _installation-virtualenv:

Installing a released version in a virtualenv

---------------------------------------------

It is highly recommended to use a separate virtualenv for installing Kallithea.

This way, all libraries required by Kallithea will be installed separately from your

main Python installation and other applications and things will be less

problematic when upgrading the system or Kallithea.

An additional benefit of virtualenv is that it doesn't require root privileges.

- Assuming you have installed virtualenv, create a new virtual environment

  for example, in `/srv/kallithea/venv`, using the venv command::

    python3 -m venv /srv/kallithea/venv

- Activate the virtualenv in your current shell session and make sure the

  basic requirements are up-to-date by running the following commands in your

  bash shell::

    . /srv/kallithea/venv/bin/activate

    pip install --upgrade pip setuptools

.. note:: You can't use UNIX ``sudo`` to source the ``virtualenv`` script; it

   will "activate" a shell that terminates immediately. It is also perfectly

   acceptable (and desirable) to create a virtualenv as a normal user.

- Make a folder for Kallithea data files, and configuration somewhere on the

  filesystem. For example::

    mkdir /srv/kallithea

- Go into the created directory and run this command to install Kallithea::

    pip install --upgrade kallithea

.. note:: Some dependencies are optional. If you need them, install them in

   the virtualenv too::

     pip install --upgrade kallithea python-ldap python-pam psycopg2

   This might require installation of development packages using your

   distribution's package manager.

   Alternatively, download a .tar.gz from http://pypi.python.org/pypi/Kallithea,

   extract it and install from source by running::

     pip install --upgrade .

- This will install Kallithea together with all other required

  Python libraries into the activated virtualenv.

You can now proceed to :ref:`install-front-end`.

.. _installation-without-virtualenv:

Installing a released version without virtualenv

------------------------------------------------

For installation without virtualenv, 'just' use::

    pip install kallithea

Note that this method requires root privileges and will install packages

globally without using the system's package manager.

To install as a regular user in ``~/.local``, you can use::

    pip install --user kallithea

You can now proceed to :ref:`install-front-end`.

.. _install-front-end:

Prepare front-end files

-----------------------

Finally, the front-end files with CSS and JavaScript must be prepared. This

depends on having some commands available in the shell search path: ``npm``

version 6 or later, and ``node.js`` (version 12 or later) available as

``node``. The installation method for these dependencies varies between

operating systems and distributions.

Prepare the front-end by running::

    kallithea-cli front-end-build

You can now proceed to :ref:`setup`.