Building kitty from source
==============================

.. image:: https://github.com/kovidgoyal/kitty/workflows/CI/badge.svg
  :alt: Build status
  :target: https://github.com/kovidgoyal/kitty/actions?query=workflow%3ACI


|kitty| is designed to run from source, for easy hackability. Make sure
the following dependencies are installed first.

Dependencies
----------------

Run-time dependencies:

    * python >= 3.5
    * harfbuzz >= 1.5.0
    * zlib
    * libpng
    * liblcms2
    * freetype (not needed on macOS)
    * fontconfig (not needed on macOS)
    * libcanberra (not needed on macOS)
    * ImageMagick (optional, needed to use the ``kitty icat`` tool to display images in the terminal)
    * pygments (optional, need for syntax highlighting in ``kitty +kitten diff``)

Build-time dependencies:

    * gcc or clang
    * pkg-config
    * For building on Linux in addition to the above dependencies you might also need to install the ``-dev`` packages for:
      ``libdbus-1-dev``, ``libxcursor-dev``, ``libxrandr-dev``, ``libxi-dev``, ``libxinerama-dev``, ``libgl1-mesa-dev``, ``libxkbcommon-x11-dev``, ``libfontconfig-dev``, ``libx11-xcb-dev``, ``liblcms2-dev``, and ``libpython3-dev``,
      if they are not already installed by your distro.

Install and run from source
------------------------------

.. code-block:: sh

    git clone https://github.com/kovidgoyal/kitty && cd kitty

Now build the native code parts of |kitty| with the following command::

    make

You can run |kitty|, as::

    ./kitty/launcher/kitty

If that works, you can create a symlink to the launcher in :file:`~/bin` or
some other directory on your PATH so that you can run |kitty| using
just ``kitty``.


Building kitty.app on macOS from source
-------------------------------------------

Run::

    make app

This :file:`kitty.app` unlike the released one does not include its own copy of
python and the other dependencies. So if you ever un-install/upgrade those dependencies
you might have to rebuild the app.

.. note::
   The released :file:`kitty.dmg` includes all dependencies, unlike the
   :file:`kitty.app` built above and is built automatically by using the
   :file:`kitty` branch of `build-calibre
   <https://github.com/kovidgoyal/build-calibre>`_ however, that is designed to
   run on Linux and is not for the faint of heart.


.. note::
   Apple disallows certain functionality, such as notifications for unsigned applications.
   If you need this functionality, you can try signing the built kitty.app with
   a self signed certificate, see for example, `here
   <https://stackoverflow.com/questions/27474751/how-can-i-codesign-an-app-without-being-in-the-mac-developer-program/27474942>`_.

Build and run from source with Nix
-------------------------------------------

On NixOS or any other Linux or macOS system with the Nix package manager
installed, execute `nix-shell
<https://nixos.org/guides/nix-pills/developing-with-nix-shell.html>`_ to create
the correct environment to build kitty or use ``nix-shell --pure`` instead to
eliminate most of the influence of the outside system, e.g. globally installed
packages. ``nix-shell`` will automatically fetch all required dependencies and
make them available in the newly spawned shell.

Then proceed with ``make`` or ``make app`` according to the platform specific instructions above.


Note for Linux/macOS packagers
----------------------------------

The released |kitty| source code is available as a `tarball`_ from
`the GitHub releases page <https://github.com/kovidgoyal/kitty/releases>`_.

While |kitty| does use python, it is not a traditional python package, so please
do not install it in site-packages.
Instead run::

    python3 setup.py linux-package

This will install |kitty| into the directory :file:`linux-package`. You can run |kitty|
with :file:`linux-package/bin/kitty`.  All the files needed to run kitty will be in
:file:`linux-package/lib/kitty`. The terminfo file will be installed into
:file:`linux-package/share/terminfo`. Simply copy these files into :file:`/usr` to install
|kitty|. In other words, :file:`linux-package` is the staging area into which |kitty| is
installed. You can choose a different staging area, by passing the ``--prefix``
argument to :file:`setup.py`.

You should probably split |kitty| into two packages, :file:`kitty-terminfo` that
installs the terminfo file and :file:`kitty` that installs the main program.
This allows users to install the terminfo file on servers into which they ssh,
without needing to install all of |kitty|.

.. note::
        You need a couple of extra dependencies to build linux-package.
        :file:`tic` to compile terminfo files, usually found in the
        development package of :file:`ncurses`. Also, if you are building from
        a git checkout instead of the released source code tarball, you will
        need :file:`sphinx-build` from the `Sphinx documentation generator
        <https://www.sphinx-doc.org/>`_.

This applies to creating packages for |kitty| for macOS package managers such as
brew or MacPorts as well.


.. note::
        |kitty| has its own update check mechanism, if you would like to turn
        it off for your package, use
        ``python3 setup.py linux-package --update-check-interval=0``
