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@subsection Goals
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The @file{trunk/Scripts/Bash} directory exists to organize the trunk
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development line of @file{centos-art.sh} automation script. The
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@file{centos-art.sh} script standardizes frequent tasks inside your
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working copy of CentOS Artwork Repository.
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@subsection Description
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The best way to understand @file{centos-art.sh} automation script is
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studying its source code. However, as start point, you may prefer to
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read an introductory resume before diving into the source code
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details.
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The @file{centos-art.sh} script is written in Bash. Most tasks, inside
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@file{centos-art.sh} script, have been organized in many specific
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functionalities that you can invoke from the @command{centos-art}
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command-line interface.
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When you type the @command{centos-art} command in your terminal, the
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operating system trys to execute that command. In order to execute the
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command, the operating system needs to know where it is, so the
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operating system uses the @var{PATH} environment variable to look for
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that command location. If your system was prepared to use CentOS
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Artwork Repository correctly (--- @strong{Removed}(pxref:trunk Scripts Bash Functions
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Verify) ---), you should have a symbolic link inside @file{~/bin/}
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directory that points to the @file{centos-art.sh} script file. As
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@file{~/bin/} directory is, by default, inside @var{PATH} environment
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variable, the execution of @command{centos-art} command runs the
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@file{centos-art.sh} script.
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When @file{centos-art.sh} script is executed, the first it does is
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executing the @file{trunk/Scripts/Bash/initEnvironment.sh} script to
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initialize global variables (e.g., @command{gettext} variables) and
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global function scripts. Global function scripts are located inside
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@file{trunk/Scripts/Bash/Functions} directory and their file names
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begin with @samp{cli}. Global function scripts provide common
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functionalities that can be used anywhere inside @file{centos-art.sh}
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script execution environment.
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Once global variables and function scripts have been loaded,
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@file{centos-art.sh} script executes the @command{cli} global function
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from @file{cli.sh} function script to retrive command-line arguments
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and define some default values that may be used later by specific
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function scripts (--- @strong{Removed}(pxref:trunk Scripts Bash Functions) ---).
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As convenction, the @file{centos-art.sh} command-line arguments have
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the following format:
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@verbatim
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centos-art arg1 --arg2=val2 --arg3=val3
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@end verbatim
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In the above example, @samp{centos-art} is the command you use to
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invoke @file{centos-art.sh} script. The @samp{arg1} is required and
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represents the functionality you want to perform (e.g.,
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@option{verify}, @option{render}, @option{locale}, @option{manual},
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etc.). The remaining arguments are modifiers to @option{arg1}. The
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@option{--arg2} definition is required and represets, specifically,
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the action inside the functionality you want to perform. The
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@option{--arg3} and on, are optional.
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Once command-line arguments have been retrived, the
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@file{centos-art.sh} script loads specific functionalities using the
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@file{cli_getFunctions.sh} function script. Only one specific
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functionality can be loaded at one script execution I.e., you run
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@command{centos-art.sh} script to run just one functionality.
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@float Figure,fig:trunk/Scripts/Bash:Initialization
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@verbatim
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+----------------------------------------------------------------------+
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| [centos@host]$ centos-art function --action='value' --option='value' |
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+----------------------------------------------------------------------+
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| ~/bin/centos-art --> ~/artwork/trunk/Scripts/Bash/centos-art.sh |
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+---v-----------------------------------------v------------------------+
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| centos-art.sh |
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+---v---------------------------------v---+
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. | initEnvironment.sh | .
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. +---------------------------------+ .
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. | cli $@ | .
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. +---v-------------------------v---+ .
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. . | cli_getFunctions | . .
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. . +---v-----------------v---+ . .
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9c6e0d |
. . . | function1 | . . .
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9c6e0d |
. . . | function2 | . . .
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9c6e0d |
. . . | function3 | . . .
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. . . +-----------------+ . . .
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. . ........................... . .
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. ................................... .
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9c6e0d |
...........................................
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@end verbatim
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@caption{The functionalities initialization environment.}
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@end float
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Functionalities are implemented by means of actions. Once the
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functionality has been initiazalized, actions initialization take
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place for that functionality. Actions initialization model is very
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similar to functions initialization model. But with the difference,
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that actions are loaded inside function environment, and so, share
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variables and functions defined inside function environment.
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@float Figure,fig:trunk/Scripts/Bash/Functions:Initialization
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@verbatim
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+--------------------------------------+
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| cli_getFunctions |
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+---v------------------------------v---+
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. | function1 | .
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. +---v----------------------v---+ .
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. . | function1_getActions | . .
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. . +---v--------------v---+ . .
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. . . | action 1 | . . .
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9c6e0d |
. . . | action 2 | . . .
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. . . | action n | . . .
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. . . +--------------+ . . .
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. . ........................ . .
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. ................................ .
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. +------------------------------+ .
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. | function2 | .
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. +---v----------------------v---+ .
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. . | function2_getActions | . .
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. . +---v--------------v---+ . .
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. . . | action 1 | . . .
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. . . | action 2 | . . .
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. . . | action n | . . .
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. . . +--------------+ . . .
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. . ........................ . .
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. ................................ .
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. +------------------------------+ .
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. | function3 | .
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. +---v----------------------v---+ .
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. . | function3_getActions | . .
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. . +---v--------------v---+ . .
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. . . | action 1 | . . .
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. . . | action 2 | . . .
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. . . | action n | . . .
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. . . +--------------+ . . .
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. . ........................ . .
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. ................................ .
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........................................
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@end verbatim
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@caption{The actions initialization environment.}
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@end float
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@subsection Usage
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The @file{centos-art.sh} script usage information is described inside
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each specific function documentation (--- @strong{Removed}(pxref:trunk Scripts Bash
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Functions) ---).
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@subsection See also
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@menu
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* Repository trunk Scripts::
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@comment --- Removed(* Repository trunk Scripts Bash Functions::) ---
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@comment --- Removed(* Repository trunk Scripts Bash Locale::) ---
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@end menu
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