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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<chapter id="relinfo-getting-enea-linux">
<title>Getting Enea Linux</title>
<para>Enea Linux is available as both pre-built binary images and source
code. Both serve a specific purpose and each have their advantages. However,
using the pre-built binary images allows for getting up and running faster.
Please refer to the sections below for details on how to get Enea Linux as
pre-built binary images or source code.</para>
<section id="relinfo-getting-pre-built-images">
<title>Getting Pre-built Binaries</title>
<para>Enea Linux pre-built binaries are available for download on <ulink
url="https://portal.enea.com/login/?redirect_to=https%3A%2F%2Fportal.enea.com%2F">portal.enea.com</ulink>.
Log in using the credentials provided by Enea for your user account. Using
the menu, browse to the Linux section where you will now have access to
the <emphasis role="bold">Files</emphasis> and <emphasis
role="bold">Online Documentation</emphasis> sections.</para>
<para>The Files section lists each Enea Linux distribution, one for each
version and profile, as a separate download package. Clicking on the name
of the distribution will open a new page, which presents further details
about the content of the release and a list of downloadable archives, one
for each hardware target included in the release. Each archive provides
the following content:</para>
<itemizedlist>
<listitem>
<para><emphasis>images</emphasis> directory – this directory
includes the binary image files needed to boot the target with Enea
Linux. This includes the kernel, the root file system, device tree,
etc.</para>
</listitem>
<listitem>
<para><emphasis>sdk</emphasis> directory – this directory
includes the installer for the SDK.</para>
</listitem>
<listitem>
<para><emphasis>deb</emphasis> directory – this directory
contains all the packages included in the distribution in deb format,
which can be installed using the package manager.</para>
</listitem>
</itemizedlist>
<para>For faster downloads, each archive is mirrored in several places,
geographically. Choose the archive in the region closest to you.</para>
<para>The Documentation section lists all the documents delivered with the
release:</para>
<itemizedlist>
<listitem>
<para><emphasis role="bold">Enea Linux User’s Guide</emphasis> -
intended for Enea Linux platform developers, who want to configure and
build customized Linux kernel images for embedded system targets,
using the Yocto configuration and build system.</para>
</listitem>
<listitem>
<para><emphasis role="bold">Enea Linux Open Source Report</emphasis> -
contains the open source and license information pertaining to
packages provided with this release of Enea Linux.</para>
</listitem>
<listitem>
<para><emphasis role="bold">Enea Linux Release Info</emphasis> -
provides information about the current released distribution for a
selected set of targets, along with installation requirements and
procedures.</para>
</listitem>
</itemizedlist>
</section>
<section id="relinfo-getting-source">
<title>Getting the Sources</title>
<para>Enea Linux sources are available for cloning from a set of Git
repositories on <ulink url="https://git.enea.com">git.enea.com</ulink>.
Since Enea Linux requires multiple repositories, Google Repo tool is used
in order to manage configurations and make the cloning step simpler. The
Google Repo tool uses files, known as manifests, which store a list of
tuples (repository URL, version). The Repo tool is then used to traverse
the list of tuples in the manifest file and clone the specified versions
of each repository. See <ulink
url="https://code.google.com/p/git-repo/">Google Code Archive for
git-repo</ulink>, for more info.</para>
<section id="getting-source-code-step-one">
<title>Get access to git.enea.com</title>
<para>In order to get access to git.enea.com, a ssh key is required for
Git authentication. If you don't already have such a key, follow the
steps below to generate one:</para>
<orderedlist>
<listitem>
<para>Generate the ssh key pair:</para>
<programlisting>$ ssh-keygen -t rsa</programlisting>
<para>When asked for a password, just press
<command>Enter</command>. This will create two files in the
<literal>.ssh</literal> directory in your home directory.</para>
<programlisting>id_rsa
id_rsa.pub</programlisting>
</listitem>
<listitem>
<para>Copy the public key into an authorized_keys file:</para>
<programlisting>$ cat id_rsa.pub >> authorized_keys</programlisting>
</listitem>
</orderedlist>
<para>Once these steps are done and you have a valid ssh key pair, send
the public key,
<emphasis><emphasis><filename>id_rsa.pub</filename></emphasis></emphasis>,
via email to <email>mailto:git_support@list.enea.se</email> in order to
get access to <ulink
url="https://git.enea.com">git.enea.com</ulink>.</para>
</section>
<section id="getting-source-code-step-two">
<title>Get Sources</title>
<para>To use the Repo tool to download the sources for Enea Linux, do
the following:</para>
<orderedlist>
<listitem condition="hidden">
<para>Make sure that the repo tool is installed. If not, do the
following: <remark>Below is include of ID
"eltf-getting-repo-install-command" from
eltf_params_updated.xml</remark></para>
<xi:include href="eltf_params_updated.xml"
xmlns:xi="http://www.w3.org/2001/XInclude"
xpointer="element(eltf-getting-repo-install-command/1)" />
</listitem>
<listitem>
<para>Define the MACHINE to the following target listed
here:<remark>Below is the "machine_list" programlisting in
machine_list_generated.xml created by the make system by extracting
from the manifest</remark></para>
<xi:include href="machine_list_generated.xml"
xmlns:xi="http://www.w3.org/2001/XInclude"
xpointer="element(machine-list/1)" />
</listitem>
<listitem>
<para>Then use the repo command below:</para>
<xi:include href="eltf_params_updated.xml"
xmlns:xi="http://www.w3.org/2001/XInclude"
xpointer="element(eltf-repo-cloning-enea-linux/1)" />
</listitem>
</orderedlist>
<para>Once the source code is downloaded, the current directory will
contain a README file with instructions on how to build the distro and
boot the raspberry pi machine. For ease of use, these instructions are
also copied into this document, see <xref
linkend="relinfo-build-boot" />.</para>
<para>It is not necessary to explicitly clone the manifest repository
since that is done automatically by the repo tool. To see the current
manifest, use the following command:</para>
<programlisting>$ repo manifest</programlisting>
<remark>The UG should be updated with instructions on how to add
customizations. That section should also contain more info about the
manifest: the manifest templates, using a branch instead of the tag EL6,
etc. When this is done a reference from here should be added.</remark>
</section>
</section>
</chapter>
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