#!/bin/bash

log()
{
	echo $@
}

err()
{
	echo $@ >&2
}

fatal()
{
	err "Fatal: $@"
	exit 1
}

try_assign_sec()
{
	local file="$1"
	local sec="$2"
	local val=`_jwbuild_cat_section "$file" "$sec"`
	[ -n "$val" ] && eval $3=\"$val\"
}

cleanup_requires()
{
#	echo $@ | sed -e '
#		s/\([a-zA-Z0-9.-]\+\)  *\([a-zA-Z0-9.-]\+\)  */\1, \2 /g
#		#s/\([a-zA-Z-]\+\)  *\([<>=]*\)  *\([a-zA-Z0-9\.-]*\)/\1 \2 \3,/g
#		#s/,,/,/g
#		#s/,$//
#	'
	echo $@ | sed -e '
		s/^ //g
		s/\([ 	]\|$\)\+/, /g
		s/, $//
		s/, $//
		s/ *,* *\([<>=]\+\) *,* */ \1 /g
	'
}

usage()
{
	cat <<- EOT | sed 's/^	*|//'
	|
	|  $myname [options]
	|
	|  options are
	|
	|	-h:                  display this help message and exit sucessfully
	|	-F filename          read project description file
	|	-d "description"     use description
	|
	EOT
	goodbye $1
}

project_descr_file="$1"
myname=`basename $0`

set -e

eval set -- `getopt -- hF:d:n:s:p:v:c:l:V:r:R: "$@"`

while [ "$1" != -- ]; do
case $1 in
	-h)
		usage 0;;
	-F)
		project_descr_file="$2"
		shift
		;;
	-d)
		description="$2"
		shift
		;;
	-n)
		name="$2"
		shift
		;;
	-s)
		summary="$2"
		shift
		;;
	-p)
		prefix="$2"
		shift
		;;
	-v)
		version="$2"
		shift
		;;
	-c)
		cflags="$2"
		shift
		;;
	-l)
		libflags="$2"
		shift
		;;
	-r)
		requires_run="$2"
		shift
		;;
	-R)
		requires_build="$2"
		shift
		;;
	-V)
		variables="$variables$2\n"
		shift
		;;
	*)
		usage 1;;
esac
shift
done
shift

set +e

[ -r "$project_descr_file" ] && {

	build_functions_sh=jw-build-functions.sh
	for d in `dirname $0`; do
		[ -f "$d/$build_functions_sh" ] && {
			build_functions_sh_path=$d/$build_functions_sh
			break
		}
	done
	[ "$build_functions_sh_path" ] || fatal "$build_functions_sh not found"
	. $build_functions_sh_path

	try_assign_sec $project_descr_file description descr
	try_assign_sec $project_descr_file summary summary
	try_assign_sec $project_descr_file requires_run requires_run
	try_assign_sec $project_descr_file requires_build requires_build
}

[ "$variables" ] && echo -e "$variables"

cat <<-EOT
prefix=$prefix
exec_prefix=\${prefix}
includedir=\${prefix}/include
libdir=\${exec_prefix}/lib

Name: $name
Description: $summary
Version: $version
EOT
[ "$cflags" ] && echo "Cflags: $cflags"
[ "$libflags" ] && echo "Libs: $libflags"
[ "$requires_run" ] && echo "Requires: `cleanup_requires $requires_run`"
[ "$requires_build" ] && echo "Requires.private: `cleanup_requires $requires_build`"
# [ "$requires_devel" ] && ?? # not sure what to do with this

exit 0