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#!/bin/sh
#---------------------------------*- sh -*-------------------------------------
# ========= |
# \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
# \\ / O peration |
# \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
# \\/ M anipulation |
#------------------------------------------------------------------------------
# License
# This file is part of OpenFOAM.
#
# OpenFOAM is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License
# along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
#
# Script
# foamUpdateCaseFileHeader
#
# Description
# Updates the header of application files.
# By default, writes current version in the header.
# Alternatively version can be specified with -v option.
# Also removes consecutive blank lines from file.
#
#------------------------------------------------------------------------------
foamVersion=$WM_PROJECT_VERSION

usage() {
    cat<<USAGE

Usage: ${0##*/} [OPTION] <file1> ... <fileN>

options:
-v VER specifies the version to be written in the header
-h help

Updates the header of application files and removes consecutive blank lines.
By default, writes current OpenFOAM version in the header.
An alternative version can be specified with the -v option.

USAGE
    exit 1
}


printHeader() {
    cat<<HEADER
/*--------------------------------*- C++ -*----------------------------------*\\
| ========= | |
| \\\\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\\\ / O peration | Version: ${foamVersion} |
| \\\\ / A nd | Web: www.OpenFOAM.com |
| \\\\/ M anipulation | |
\\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ${1};
class ${2};
object ${3};
}
HEADER
}


#
# extract attribute '$1' from file '$2'
#
FoamFileAttribute() {
    sed -n -e 's/[ ;]*$//' -e "s/^ *$1 *//p" $2
}


#
# OPTIONS
#
opts=$(getopt hv: $*)
if [ $? -ne 0 ]
then
echo "Aborting due to invalid option"
    usage
fi
eval set -- '$opts'
while [ "$1" != "--" ]
do
case $1 in
    -v)
        foamVersion=$2
        shift
        ;;
    -h)
        usage
        ;;
    esac
shift
done
shift

[ $# -ge 1 ] || usage


# constant width for version
foamVersion=$(printf %-36s $foamVersion)

#
# MAIN
#
unset NOTE

for caseFile
do
if grep FoamFile $caseFile >/dev/null 2>&1
    then
echo "Updating case file: $caseFile"
        sed -n '/FoamFile/,/}/p' $caseFile > FoamFile.tmp

        FORMAT=$(FoamFileAttribute format FoamFile.tmp)
        CLASS=$(FoamFileAttribute class FoamFile.tmp)
        OBJECT=$(FoamFileAttribute object FoamFile.tmp)
        # extract NOTE?

        printHeader $FORMAT $CLASS $OBJECT $NOTE > FoamFile.tmp
        sed '1,/}/d' $caseFile | sed '/./,/^$/!d' >> FoamFile.tmp

        # use cat to avoid removing/replace soft-links
        [ -s FoamFile.tmp ] && cat FoamFile.tmp >| $caseFile
        rm -f FoamFile.tmp 2>/dev/null
    else
echo " Invalid case file: $caseFile" 1>&2
    fi
done

#------------------------------------------------------------------------------
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