##################
Installation Guide
##################

XGBoost provides binary packages for some language bindings.  The binary packages support
the GPU algorithm (``gpu_hist``) on machines with NVIDIA GPUs. Please note that **training
with multiple GPUs is only supported for Linux platform**. See :doc:`gpu/index`.  Also we
have both stable releases and nightly builds, see below for how to install them.  For
building from source, visit :doc:`this page </build>`.

.. contents:: Contents

Stable Release
==============

Python
------

Pre-built binary are uploaded to PyPI (Python Package Index) for each release.  Supported platforms are Linux (x86_64, aarch64), Windows (x86_64) and MacOS (x86_64).

.. code-block:: bash

  pip install xgboost


You might need to run the command with ``--user`` flag or use ``virtualenv`` if you run
into permission errors.  Python pre-built binary capability for each platform:

.. |tick| unicode:: U+2714
.. |cross| unicode:: U+2718

+-------------------+---------+----------------------+
| Platform          | GPU     | Multi-Node-Multi-GPU |
+===================+=========+======================+
| Linux x86_64      | |tick|  |  |tick|              |
+-------------------+---------+----------------------+
| Linux aarch64     | |cross| |  |cross|             |
+-------------------+---------+----------------------+
| MacOS             | |cross| |  |cross|             |
+-------------------+---------+----------------------+
| Windows           | |tick|  |  |cross|             |
+-------------------+---------+----------------------+

R
-

* From CRAN:

  .. code-block:: R

    install.packages("xgboost")

  .. note:: Using all CPU cores (threads) on Mac OSX

     If you are using Mac OSX, you should first install OpenMP library (``libomp``) by running

     .. code-block:: bash

        brew install libomp

     and then run ``install.packages("xgboost")``. Without OpenMP, XGBoost will only use a
     single CPU core, leading to suboptimal training speed.

* We also provide **experimental** pre-built binary with GPU support. With this binary,
  you will be able to use the GPU algorithm without building XGBoost from the source.
  Download the binary package from the Releases page. The file name will be of the form
  ``xgboost_r_gpu_[os]_[version].tar.gz``, where ``[os]`` is either ``linux`` or ``win64``.
  (We build the binaries for 64-bit Linux and Windows.)
  Then install XGBoost by running:

  .. code-block:: bash

    # Install dependencies
    R -q -e "install.packages(c('data.table', 'jsonlite'))"
    # Install XGBoost
    R CMD INSTALL ./xgboost_r_gpu_linux.tar.gz

JVM
---

You can use XGBoost4J in your Java/Scala application by adding XGBoost4J as a dependency:

.. code-block:: xml
  :caption: Maven

  <properties>
    ...
    <!-- Specify Scala version in package name -->
    <scala.binary.version>2.12</scala.binary.version>
  </properties>

  <dependencies>
    ...
    <dependency>
        <groupId>ml.dmlc</groupId>
        <artifactId>xgboost4j_${scala.binary.version}</artifactId>
        <version>latest_version_num</version>
    </dependency>
    <dependency>
        <groupId>ml.dmlc</groupId>
        <artifactId>xgboost4j-spark_${scala.binary.version}</artifactId>
        <version>latest_version_num</version>
    </dependency>
  </dependencies>

.. code-block:: scala
  :caption: sbt

  libraryDependencies ++= Seq(
    "ml.dmlc" %% "xgboost4j" % "latest_version_num",
    "ml.dmlc" %% "xgboost4j-spark" % "latest_version_num"
  )

This will check out the latest stable version from the Maven Central.

For the latest release version number, please check `release page <https://github.com/dmlc/xgboost/releases>`_.

To enable the GPU algorithm (``tree_method='gpu_hist'``), use artifacts ``xgboost4j-gpu_2.12`` and ``xgboost4j-spark-gpu_2.12`` instead (note the ``gpu`` suffix).


.. note:: Windows not supported in the JVM package

  Currently, XGBoost4J-Spark does not support Windows platform, as the distributed training algorithm is inoperational for Windows. Please use Linux or MacOS.


Nightly Build
=============


Python
------

Nightly builds are available. You can go to `this page <https://s3-us-west-2.amazonaws.com/xgboost-nightly-builds/list.html>`_,
find the wheel with the commit ID you want and install it with pip:

.. code-block:: bash

  pip install <url to the wheel>


The capability of Python pre-built wheel is the same as stable release.


R
-

Other than standard CRAN installation, we also provide *experimental* pre-built binary on
with GPU support.  You can go to `this page
<https://s3-us-west-2.amazonaws.com/xgboost-nightly-builds/list.html>`_, Find the commit
ID you want to install and then locate the file ``xgboost_r_gpu_[os]_[commit].tar.gz``,
where ``[os]`` is either ``linux`` or ``win64``. (We build the binaries for 64-bit Linux
and Windows.) Download it and run the following commands:

.. code-block:: bash

  # Install dependencies
  R -q -e "install.packages(c('data.table', 'jsonlite', 'remotes'))"
  # Install XGBoost
  R CMD INSTALL ./xgboost_r_gpu_linux.tar.gz


JVM
---

First add the following Maven repository hosted by the XGBoost project:

.. code-block:: xml
  :caption: Maven

  <repository>
    <id>XGBoost4J Snapshot Repo</id>
    <name>XGBoost4J Snapshot Repo</name>
    <url>https://s3-us-west-2.amazonaws.com/xgboost-maven-repo/snapshot/</url>
  </repository>

.. code-block:: scala
  :caption: sbt

  resolvers += "XGBoost4J Snapshot Repo" at "https://s3-us-west-2.amazonaws.com/xgboost-maven-repo/snapshot/"

Then add XGBoost4J as a dependency:

.. code-block:: xml
  :caption: maven

  <properties>
    ...
    <!-- Specify Scala version in package name -->
    <scala.binary.version>2.12</scala.binary.version>
  </properties>

  <dependencies>
    ...
    <dependency>
        <groupId>ml.dmlc</groupId>
        <artifactId>xgboost4j_${scala.binary.version}</artifactId>
        <version>latest_version_num-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>ml.dmlc</groupId>
        <artifactId>xgboost4j-spark_${scala.binary.version}</artifactId>
        <version>latest_version_num-SNAPSHOT</version>
    </dependency>
  </dependencies>

.. code-block:: scala
  :caption: sbt

  libraryDependencies ++= Seq(
    "ml.dmlc" %% "xgboost4j" % "latest_version_num-SNAPSHOT",
    "ml.dmlc" %% "xgboost4j-spark" % "latest_version_num-SNAPSHOT"
  )

Look up the ``version`` field in `pom.xml <https://github.com/dmlc/xgboost/blob/master/jvm-packages/pom.xml>`_ to get the correct version number.

The SNAPSHOT JARs are hosted by the XGBoost project. Every commit in the ``master`` branch will automatically trigger generation of a new SNAPSHOT JAR. You can control how often Maven should upgrade your SNAPSHOT installation by specifying ``updatePolicy``. See `here <http://maven.apache.org/pom.html#Repositories>`_ for details.

You can browse the file listing of the Maven repository at https://s3-us-west-2.amazonaws.com/xgboost-maven-repo/list.html.

To enable the GPU algorithm (``tree_method='gpu_hist'``), use artifacts ``xgboost4j-gpu_2.12`` and ``xgboost4j-spark-gpu_2.12`` instead (note the ``gpu`` suffix).
