@subheading Goals

This section describes the @code{prepare} functionality of

@command{centos-art.sh} script and the preliminar steps you need to

follow in order to get your workstation ready for using the CentOS

Artwork Repository.

@subheading Description

The @code{prepare} functionality of @command{centos-art.sh} script

verifies all the information required by the working copy of CentOS

Artwork Repository (e.g., packages of software, symbolic links, etc.)

does exist in your workstation.

The @code{prepare} functionality of @command{centos-art.sh} script is

part of the CentOS Artwork Repository. So, in order to execute the

@code{prepare} functionality of @command{centos-art.sh} script you

need to have access to a working copy of CentOS Artwork Repository,

first.  Working copies of CentOS Artwork Repository are downloaded

from the source repository and made available to you by mean of

workstations.  A workstation is a computer that you install and

configure (prepare) to do something. In this case, you pick a computer

and prepare it for working on the CentOS Artwork Repository.

@subsubheading Installing the workstation

Installing the workstation is the first step you need to perform for

using the CentOS Artwork Repository. In this step you make your

computer functional through an operating system. In this case, The

Community Enterprise Operating System; which is also know as The

CentOS Distribution or just CentOS, for short.

To install The CentOS Distribution you need to have the installation

media somehow (e.g., CDs, DVDs, Pendrives, etc.). There are several

different ways to perform the installation process of CentOS

distribution, but generally, you put the installation media in your

media reader, boot the computer from it, and follow the installer

intructions.  That simple.

If you don't have the installation media of CentOS distribution, you

need to download the ISO files related to the media you plan to use

(e.g., CD or DVD) and then create the installation media by yourself.

The CentOS Distribution ISO files can be downloaded from

@url{http://mirrors.centos.org/} and, if you chosen CD or DVD as your

prefered installation medium, you can burn the ISO files using the

@command{K3B} application to create the installation media you'll use.

Of course, in order to download the ISO files and create the

installation media, you need to have an already installed CentOS

workstation where you can realized all the work.

@subsubheading Configuring the workstation

Once you've installed the workstation and it is up and running, login

as @samp{root} user, create a username (e.g., @samp{centos}) and set a

password for it. This is the username you must use for everyday work

inside your working copy of the CentOS Artwork Repository.

@quotation

@strong{Caution} Do not use ever the @samp{root} username for your

everyday work inside the working copy of CentOS Artwork Repository.

It is dangerous and might provoke unreversable damages on your

workstation.

@end quotation

Once you've created the username for everyday work, there are some

environment variables that you can customize to fit your personal

needs (e.g., the text editor you'll use, the language the automation

scripts will use to print and translate output messages, the time

correction for your location, etc.).  To customize these variables you

need to edit your profile file (i.e., @file{~/.bash_profile}) and set

the redefinition there.  Notice that you may need to logout and then

do login again in order for the new variable values to take effect.

@table @strong

@item Default text editor:

The default text editor information is contrlled by the @env{EDITOR}

environment variable. The @file{centos-art.sh} script uses the default

text editor to edit subversion pre-commit messages, translation files,

documentation files, script files, and similar text-based files.

If @env{EDITOR} environment variable is not set, @file{centos-art.sh}

script uses @file{/usr/bin/vim} as default text editor. Otherwise, the

following values are recognized by @file{centos-art.sh} script:

@itemize

@item @file{/usr/bin/vim}

@item @file{/usr/bin/emacs}

@item @file{/usr/bin/nano}

@end itemize

If no one of these values is set in the @env{EDITOR} environment

variable, the @file{centos-art.sh} script uses @file{/usr/bin/vim}

text editor, the one installed by default in The CentOS Distribution. 

@item Default locale information:

The default locale information is controlled by the @env{LANG}

environment variable. This variable is initially set in the

configuration process of CentOS distribution installer, specifically

in the @samp{Language} step; or once installed using the

@command{system-config-language} tool.

The @command{centos-art.sh} script uses the @env{LANG} environment

variable to determine what language to use for printing output

messages. Moreover, the @code{locale} functionality uses the

@env{LANG} to determine what translation messages to udpate or edit.

@item Default time zone representation:

The time zone representation is a time correction applied to the

system time (stored in the BIOS clock) based on your country location.

This correction is specially useful to distributed computers around

the world that work together and need to be syncronized in time to

know when things happened.

The CentOS Artwork Repository is made of one server and several

workstations spread around the world. In order for all these

workstations to know when changes in the server took place, it is

required that all the workstations set their system clocks to use the

same time information (i.e., @acronym{UTC,Coordinated Universal Time})

and set the time correction for their countries in the operating

system.  Otherwise, it'd be hard to know when something exactly

happened.

Generally, setting the time information is a straight-forward task and

configuration tools provided by The CentOS Distribution do cover time

correction for most of the countries around the world.  However, if

you need a time precision not provided by any of the date and time

configuration tools provided by The CentOS Distribution then, you need

to use the @env{TZ} environment variable to correct the time

information by yourself.  The format of @env{TZ} environment variable

is described in @file{tzset(3)} manual page.  

@end table

@subsubheading Downloading the working copy

Once you've configured the workstation, it is time to download the

working copy of CentOS Artwork Repository. 

To download the working copy of CentOS Artwork Repository you need to

login as your everyday work username (e.g., @samp{centos}) and use the

Subversion client to bring all the files you need to work with down

from the source location of CentOS Artwork Repository

(@url{https://projects.centos.org/svn/artwork/}) to your workstation,

just as the following command describes:

@verbatim

svn co https://projects.centos.org/svn/artwork ~/

@end verbatim

This command will create the working copy of CentOS Artwork Repository

in your workstation, specifically in the @file{/home/centos/artwork}

directory.  Note that you only need to execute this command once.

After that, to keep your working copy up to date, you use the

Subversion @command{update} command instead.

@quotation

@strong{Tip} In the condition that you don't have Subversion client

installed in the workstation, then you can install it using the

command:

@verbatim

sudo yum install subversion

@end verbatim

@end quotation

@subsubheading Configuring the working copy

Once you have a working copy of CentOS Artwork Repository in your

workstation, you can go and run the @code{prepare} functionality of

@command{centos-art.sh} script to realize the remaining configuration

stuff.

Assuming this is the very first time you run the

@command{centos-art.sh} script, you'll find that there is no

@command{centos-art} command-line interface for it in your

workstation.  This is correct. In order to have the

@command{centos-art} command-line in your workstation, you need to run

the @command{centos-art.sh} script using its absolute path:

@verbatim

~/artwork/trunk/Scripts/centos-art.sh prepare [OPTIONS]

@end verbatim

Assuming you've already run the @code{prepare} functionality before,

there is no need for you to use the absolute path again. Instead, you

can use the @command{centos-art} command-line interface directly, as

the following example describes:

@verbatim

centos-art.sh prepare [OPTIONS]

@end verbatim

Notice that you can execute the @code{prepare} functionality more than

once. This is specially useful to keep the link information

syncronized. For example, considering you've added new brushes to or

removed old brushes from your working copy of CentOS Artwork

Repository, the link information related to those files need to be

updated in the @file{~/.gimp-2.2/brushes} directory too, in a way that

reflect the addition/deletion change that took place in your working

copy.  The same is true for fonts, patterns and palettes components.

@subheading Usage

@subsubheading Synopsis

@command{centos-art prepare [OPTIONS]}

@subsubheading Options

@table @option

@item --packages

Verify existence of software packages and install them if they aren't

installed yet.

This option provides the software required to manipulate files inside

the repository (e.g., image files, documentation files, translation

files, script files, etc.). Most of the software packages required by

the CentOS Artwork Repository are available on The CentOS Distribution

and can be installed using The CentOS Distribution installation media.

The only exception is the @file{inkscape}, the package you use to

manipulate @acronym{SVG,Scalable Vector Graphics} files.  The

@file{inkscape} package isn't inside The CentOS Distribution or any of

The CentOS Project repositories neither, so you need to install it from

a third party repositories like @samp{RPMForge} or @samp{EPEL}.

@item --link

Update connection between working copy and workstation through

symbolic links.

This option creates the @command{centos-art} command-line interface of

@command{centos-art.sh} script through a symbolic link.  There is no

need for you to type the full path to @command{centos-art.sh} script

each time you need to execute it.  Instead, you use the

@command{centos-art} command which is much shorter and faster to type.

This option connects design compenents like fonts, brushes, patterns

and palettes inside your working copy of CentOS Artwork Repository

with programs like @acronym{GIMP, GNU Image Manipulation Program} and

Inkscape outside it. This way, all your modifications on these

components will take place inside the repository and will be shared to

all other working copies the next time you commit the changes up to

source repository.

This option standardizes width, tabulation, indentation, and line

numbering for text editors in your workstation.  The configuration

file where these definitions are set, is versioned inside your working

copy and linked from the appropriate place in the workstation to make

it valid to your default text editor.

@item --environment

Print the name and value of some of the environment variables used by

@command{centos-art.sh} scripts.  

@item --quiet

Supress all output messages except errors.  This option assumes an

affirmative response to all questions so, take care when using it.

@end table

@subheading See also

@itemize

@item @ref{Directories trunk Scripts Functions}

@item @ref{Directories trunk Scripts}

@item @ref{Directories trunk}

@item

@url{http://wiki.centos.org/AdditionalResources/Repositories/,The

CentOS Repositories}, to know how to configure third party

repositories inside The CentOS Distribution.

@end itemize