Blame Scripts/Functions/Render/render_getConfigOption.sh

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#!/bin/bash
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#
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# render_getConfigOption.sh -- This function standardizes the way
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# action values are retrived from pre-rendition configuration files.
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# Use this function whenever you need to retrive action values from
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# pre-rendition configuration script.
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#
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# Usage: VAR=$(render_getConfigOption "ACTION" "FIELD")
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#
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# VAR is the name of the variable where we store the option named
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# returned by render_getConfigOption. 
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#
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# ACTION is the string definition set in the pre-rendition
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# configuration script that holds the action name and its options
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# fields.
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#
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# FIELD is the field number in the action string we want to retrive
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# option from. By default options start from third field on. The first
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# field is reserved for the action type (i.e., POST or LAST), and the
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# second field is reserved for the action itself (e.g., convertPngTo,
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# renderSyslinux, renderKsplash, etc.).
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#
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# Copyright (C) 2009-2011 Alain Reguera Delgado
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# 
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or (at your option) any later version.
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# 
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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# USA.
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# 
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# ----------------------------------------------------------------------
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# $Id$
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# ----------------------------------------------------------------------
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function render_getConfigOption {
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    local ACTION="$1"
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    local FIELD="$2"
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    local VALUE=''
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    # Check action value. The action's value must be present in order
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    # for this function to work. It provides the string needed to
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    # retrive options from.
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    if [[ "$ACTION" == '' ]];then
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        cli_printMessage "`gettext "There is no action to work with."`"
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        cli_printMessage "${FUNCDIRNAM}" 'AsToKnowMoreLine'
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    fi
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    # Check field value. The field's value must match the cut's
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    # command specification of its -f option.
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    if [[ ! "$FIELD" =~ '^([0-9]+|[0-9]+-|-[0-9]+|[0-9]+-[0-9]+)$' ]];then
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        cli_printMessage "`gettext "The field specified is not valid."`"
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        cli_printMessage "${FUNCDIRNAM}" 'AsToKnowMoreLine'
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    fi
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    # Get option from pre-rendition configuration action definition.
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    VALUE=$(echo -n "$ACTION" | cut -d: -f${FIELD})
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    # Sanitate action value passed from pre-rendition configuration
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    # action definition.
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    VALUE=$(echo -n "${VALUE}" \
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        | sed -r 's!^ *!!g' \
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        | sed -r 's!( |,|;) *! !g' \
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        | sed -r 's! *$!!g')
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    # Output action value without trailing newline.
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    echo -n "$VALUE"
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}