#! /bin/bash
#
# crayftnpreproc-wrapper --- wrapper to produce Cray ftn style front-end
#                            preprocessor output on stdout
#
# Copyright  (C)  2014  Nathanael Hübbe <nathanael.huebbe@informatik.uni-hamburg.de>
#                       Thomas Jahns <jahns@dkrz.de>
#
# Author: Nathanael Hübbe <nathanael.huebbe@informatik.uni-hamburg.de>
#         Thomas Jahns <jahns@dkrz.de>
# Maintainer: Thomas Jahns <jahns@dkrz.de>
# URL: https://www.dkrz.de/redmine/projects/scales-ppm
#
# Redistribution and use in source and binary forms, with or without
# modification, are  permitted provided that the following conditions are
# met:
#
# Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# Neither the name of the DKRZ GmbH nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
# OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#
# Wrapper for the ftn command to write preprocessed fortran files to stdout.
#
test x"$DEBUG" = x || set -x
set -e
# create temp directory for intermediate .i-files
temporaries="$(mktemp -d -t)"
trap "rm -rf $temporaries" EXIT
callDir="$PWD"

declare -a inargs outargs preprocessedFiles
inargs=("$@")
j=0
# filter -o option and argument from flags
for (( i = 0 ; i < ${#inargs[@]} ; i++ )) ; do
	case ${inargs[$i]} in
		(-o) i=$((i + 1)) ;;
		(-o*) ;;
                (-eZ) ;;
	        (-e*Z*)
			outargs[$j]="${inargs[$i]//Z/}"
			j=$((j + 1))
		;;
		(*)
			outargs[$j]="${inargs[$i]}"
			j=$((j + 1))
		;;
	esac
done

# find non-option arguments at end of input and convert to absolute
# path if necessary
for (( i = ${#outargs[@]} - 1 ; i >= 0 ; i-- )) ; do
	[[ -r "${outargs[$i]}" ]] || break
	case "${outargs[$i]}" in
		(/*) ;;
		(*) outargs[$i]="$callDir/${outargs[$i]}" ;;
	esac
done
j=0
# use previous loop termination to build list of
# names of .i-files produced by compiler
for (( i = i + 1 ; i < ${#outargs[@]} ; i++ )) ; do
	preprocessedFiles[$j]="${outargs[$i]%.*}.i"
	preprocessedFiles[$j]="${preprocessedFiles[$j]##*/}"
	j=$((j + 1))
done

# switch to temp directory to no pollute working directory
cd "$temporaries"

# find compiler if not set
if [ "${FC+set}" != set ]; then
	for F90C in ftn '' ; do
		test -n "$F90C" || exit 1
		set +e
		F90BIN=`which $F90C 2>/dev/null`
		set -e
		test ! -x "$F90BIN" || break
	done
fi
FC=${FC-$F90C}

# run compiler to produce preprocessor output
${FC} -eP "${outargs[@]}"
# pipe sanitized preprocessor output to stdout
grep -v -h '^#' "${preprocessedFiles[@]}"

#
# Local Variables:
# license-project-url: "https://www.dkrz.de/redmine/projects/scales-ppm"
# license-default: "bsd"
# End:
#
