<sect1 id="repo-ws-config">

    <title>Configuring Your Workstation</title>

    <para>

        Once your worstation has been installed, it is time for you to

        configure it. The configuration of your workstation consists

        on defining your workplace, download a working copy from

        &TCAR; and finally, run the <function>prepare</function>

        functionality of <command>centos-art.sh</command> script to

        install/update the software needed, as well as render images,

        links, and anything else needed.

    </para>

    <sect2 id="repo-ws-config-wp">

    <title>Define Your Workplace</title>

    <para>

        Once you've installed the workstation and it is up and

        running, you need to register the user name you'll use for

        working. In this task you need to use the commands

        <command>useradd</command> and <command>passwd</command> to

        create the user name and set a password for it, respectively.

        These commands require administrative privileges to be

        executed, so you need to login as <emphasis>root</emphasis>

        superuser for doing so. 

    </para>

    <caution>

    <para>

        Do not use the <emphasis>root</emphasis> username for regular

        tasks inside your working copy of &TCAR;.  This is dangerous

        and might provoke unreversable damages to your workstation.

    </para>

    </caution>

    <para>

        When you've registered your user name in the workstation, it

        provides an identifier for you to open a user's session in the

        workstation and a place to store the information you produce,

        as well. This place is known as your home directory and is

        unique for each user registered in the workstation. For

        example, if you register the user name john in your

        workstation, your home directory would be located at 

        class="directory">/home/john/</filename>.

    </para>

    <para>

        At this point it is important to define where to download the

        working copy of &TCAR; inside your home directory.  This

        desition deserves special attention and should be implemented

        carefully in order to grant a standard environment that can be

        distributed.  Let's see some alternatives.

    </para>

    <sect3>

    <title>Different Absolute Paths</title>

    <para>

        Consider that you store your working copy under 

        class="directory">/home/john/Projects/artwork/</filename> and

        I store mine under 

        class="directory">/home/al/Projects/artwork/</filename>, we'll

        end up refering the same files inside our working copies

        through different absolute paths.  This alternative generates

        a contradiction when files which hold path information inside

        are committed up to the central repository from different

        working copies. The contradiction comes from the question:

        which is the correct absolute path to use inside such files,

        yours or mine? (None of them is, of course.)

    </para>

    </sect3>

    <sect3 id="repo-ws-config-wp-OneUniqueAbsolutePath">

    <title>One Unique Absolute Path</title>

    <para>

        Another case would be that where you and I ourselves use one

        unique home directory (e.g., 

        class="directory">/home/centos/Projects/artwork/</filename>)

        to store the working copy of &TCAR; in our own workstations,

        but configure the subversion client to use different user

        names to commit changes up from the working copy to the

        central repository.  This alternative might be not so good in

        situations where you and I have to share the same workstation.

        In such cases, it would be required that we both share the

        password information of the same system user (the

        <emphasis>centos</emphasis> user in our example) which, in

        addition, gives access to that user's subversion client

        configuration and this way provokes the whole sense of using

        different subversion credentials for committing changes to be

        lost.

    </para>

    </sect3>

    <sect3>

    <title>Different Absolute Paths Through Dynamic Expansion</title>

    <para>

        Most of the absolute paths we use inside the working copy are

        made of two parts, one dynamic and one relative fixed. The

        dynamic part is the home directory of the current user and its

        value can be retrived from the <envar>$HOME</envar>

        environment variable.  The fixed part of the path is the one

        we set inside the repositroy structure itself as a matter of

        organization.  What we need here is to find a way to expand

        variables inside files that don't support variable expansion.

        This alternative had worked rather fine when we produce

        produce PNG files from SVG files and XTHML from DocBook files,

        but the same is not true for absolute paths inside files that

        are used as in their permanent state inside the repository

        (e.g., CSS files and other files similar in purpose).

    </para>

    </sect3>

    </sect2>

    <sect2 id="repo-ws-config-wc">

    <title>Download Your Working Copy</title>

    <para>

        As convenction, to use the &TCAR;, you must register the user

        name <emphasis>centos</emphasis> in your workstation, do login

        with it, and download the working copy from the central

        repository using the following command:

    </para>

    <screen>svn co https://projects.centos.org/svn/artwork /home/centos/Projects/artwork</screen>

    <para>

        The first time you download the working copy it contains no

        image files, nor documentation, or localized content inside

        it. This is because all the files provided in the working copy

        are source files (e.g., the files needed to produce other

        files) and it is up to you the action of render them to

        produce the final files (e.g., images and documentation) used

        to implement &TCPCVI;. 

    </para>

    </sect2>

    <sect2 id="repo-ws-config-sudoers">

    <title>Configure Administrative Tasks</title>

    <para>

        Most of the administrative tasks you need to perform in your

        working copy of &TCAR; are standardized inside the

        <function>prepare</function> functionality of

        <command>centos-art.sh</command> script. Inside

        <command>centos-art.sh</command>

        script, all administrative task are invoked trough the

        <command>sudo</command> command. Thus, in order for the

        <command>centos-art.sh</command> script to perform

        administrative tasks, you need to update the

        <command>sudo</command>'s configuration in a way that such

        administrative actions be allowed.

    </para>

    <para>

        At time of this writing the <command>centos-art.sh</command>

        script implements just one administrative task, that is

        package management.  Nevertheless, in the future, other

        administrative tasks might be included as well.

    </para>

    <para>

       To update the <command>sudo</command>'s configuration, execute

       the <command>visudo</command> command as <quote>root</quote>.

       Later, uncoment the <varname>Cmnd_Alias</varname> related to

       <quote>SOFTWARE</quote> and add a line for

       <quote>centos</quote> username allowing software commands. This

       configuration is illustrated in 

       linkend="repo-ws-config-sudoers-example" />.

    </para>

    <example id="repo-ws-config-sudoers-example">

    <title>The <filename>/etc/sudoers</filename> configuration file</title>

    <screenshot>

    <screeninfo><filename>/etc/sudoers</filename> configuration file</screeninfo>

    <mediaobject>

    <textobject>

<programlisting>

## Installation and management of software

Cmnd_Alias SOFTWARE = /bin/rpm, /usr/bin/up2date, /usr/bin/yum

## Next comes the main part: which users can run what software on

## which machines (the sudoers file can be shared between multiple

## systems).

## Syntax:

##

##      user    MACHINE=COMMANDS

##

## The COMMANDS section may have other options added to it.

##

## Allow root to run any commands anywhere

root    ALL=(ALL)       ALL

## Allow the centos user to run installation and management of

## software anywhere.

centos  ALL=(ALL)       SOFTWARE

</programlisting>

    </textobject>

    </mediaobject>

    </screenshot>

    </example>

    </sect2>

    <sect2 id="repo-ws-config-runout">

    <title>Run Automation Tool</title>

    <para>

        Once you've created the <quote>centos</quote> username, logged

        in with it, downloaded a working copy from &TCAR; and

        configured the <command>sudo</command>'s configuration file,

        run the <function>prepare</function> functionality of

        <command>centos-art.sh</command> script to complete the

        configuration process using the following command:

    </para>

    <screen>/home/centos/Projects/artwork/trunk/Scripts/Bash/centos-art.sh prepare</screen>

    <para>

        To know more about the <function>prepare</function>

        functionality of <command>centos-art.sh</command> script, see

        <xref linkend="scripts-bash-prepare" />.

    </para>

    </sect2>

</sect1>